Initial commit.

133 files changed, 31425 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..2aac1ab
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,5 @@
+cmake_minimum_required(VERSION 3.0)
+
+add_subdirectory(gfx)
+add_subdirectory(gfx-app)
+add_subdirectory(gltfview)
diff --git a/gfx-app/CMakeLists.txt b/gfx-app/CMakeLists.txt
new file mode 100644
index 0000000..d9cb80f
--- /dev/null
+++ b/gfx-app/CMakeLists.txt
@@ -0,0 +1,14 @@
+cmake_minimum_required(VERSION 3.0)
+
+project(gfx-app)
+
+add_library(gfx-app
+  src/gfx_app.c)
+
+target_include_directories(gfx-app PUBLIC
+  include/)
+
+target_link_libraries(gfx-app PUBLIC
+  glfw
+  log
+  timer)
diff --git a/gfx-app/README.md b/gfx-app/README.md
new file mode 100644
index 0000000..b21d1aa
--- /dev/null
+++ b/gfx-app/README.md
@@ -0,0 +1,3 @@
+# Gfx App
+
+A small library to more conveniently create a window and run a game loop.
diff --git a/gfx-app/include/gfx/gfx_app.h b/gfx-app/include/gfx/gfx_app.h
new file mode 100644
index 0000000..bdb3550
--- /dev/null
+++ b/gfx-app/include/gfx/gfx_app.h
@@ -0,0 +1,23 @@
+#pragma once
+
+#include <stdbool.h>
+
+typedef struct GfxAppDesc {
+  int argc;                 // Number of application arguments.
+  const char** argv;        // Application arguments.
+  int width;                // Window width.
+  int height;               // Window height.
+  int max_fps;              // Desired maximum framerate. 0 to disable.
+  double update_delta_time; // Desired delta time between frame updates.
+} GfxAppDesc;
+
+typedef struct GfxAppCallbacks {
+  bool (*init)(const GfxAppDesc*, void** app_state);
+  void (*update)(void* app_state, double t, double dt);
+  void (*render)(void* app_state);
+  void (*resize)(void* app_state, int width, int height);
+  void (*shutdown)(void* app_state);
+} GfxAppCallbacks;
+
+/// Create a window with an OpenGL context and run the main loop.
+bool gfx_app_run(const GfxAppDesc*, const GfxAppCallbacks*);
diff --git a/gfx-app/src/gfx_app.c b/gfx-app/src/gfx_app.c
new file mode 100644
index 0000000..f3f0473
--- /dev/null
+++ b/gfx-app/src/gfx_app.c
@@ -0,0 +1,126 @@
+#include <gfx/gfx_app.h>
+
+#include <GLFW/glfw3.h>
+#include <log/log.h>
+#include <timer.h>
+
+#include <assert.h>
+#include <stdlib.h>
+
+/// Application state.
+typedef struct GfxApp {
+  void* app_state;
+  GfxAppCallbacks callbacks;
+  int max_fps;
+  double update_delta_time;
+  GLFWwindow* window;
+} GfxApp;
+
+/// Storing the application state in a global variable so that we can call the
+/// application's callbacks from GLFW callbacks.
+static GfxApp g_gfx_app;
+
+/// Called by GLFW when the window is resized.
+static void on_resize(GLFWwindow* window, int width, int height) {
+  (*g_gfx_app.callbacks.resize)(g_gfx_app.app_state, width, height);
+}
+
+/// Run the application's main loop.
+static void loop(GfxApp* app) {
+  assert(app);
+  assert(app->window);
+
+  const double min_frame_time =
+      app->max_fps > 0 ? 1.0 / (double)(app->max_fps) : 0.0;
+  const double update_dt = app->update_delta_time;
+  double time = 0.0;
+  double time_budget = 0.0;
+  Timer timer = timer_make();
+
+  // Warm up the rendering before entering the main loop. A renderer can compile
+  // shaders and do other initialization the first time it renders a scene.
+  (*app->callbacks.render)(app->app_state);
+  glfwSwapBuffers(app->window);
+
+  timer_start(&timer);
+  while (!glfwWindowShouldClose(app->window)) {
+    timer_tick(&timer);
+    time_budget += time_delta_to_sec(timer.delta_time);
+
+    while (time_budget >= update_dt) {
+      (*app->callbacks.update)(app->app_state, time, update_dt);
+      time += update_dt;
+      time_budget -= update_dt;
+    }
+
+    (*app->callbacks.render)(app->app_state);
+    glfwSwapBuffers(app->window);
+    glfwPollEvents();
+
+    const time_point frame_end = time_now();
+    const time_delta frame_time = time_diff(timer.last_tick, frame_end);
+    if (min_frame_time > 0.0 && frame_time < min_frame_time) {
+      time_sleep(min_frame_time - frame_time);
+    }
+  }
+}
+
+bool gfx_app_run(const GfxAppDesc* desc, const GfxAppCallbacks* callbacks) {
+  assert(desc);
+  assert(callbacks);
+
+  bool success = false;
+
+  g_gfx_app.callbacks = *callbacks;
+  g_gfx_app.max_fps = desc->max_fps;
+  g_gfx_app.update_delta_time = desc->update_delta_time;
+  g_gfx_app.window = 0;
+
+  if (!glfwInit()) {
+    LOGE("glfwInit() failed");
+    return false;
+  }
+
+  const int major = 4;
+  const int minor = 4;
+  glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_API);
+  glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, major);
+  glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, minor);
+  glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+  glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GLFW_TRUE);
+  // TODO: Test antialiasing later on.
+  // glfwWindowHint(GLFW_SAMPLES, 4);
+
+  g_gfx_app.window =
+      glfwCreateWindow(desc->width, desc->height, "space", NULL, NULL);
+  if (!g_gfx_app.window) {
+    LOGE("glfwCreateWindow() failed");
+    goto cleanup;
+  }
+  glfwMakeContextCurrent(g_gfx_app.window);
+
+  // Initialize the application's state before setting any callbacks.
+  if (!(*g_gfx_app.callbacks.init)(desc, &g_gfx_app.app_state)) {
+    LOGE("Failed to initialize application");
+    goto cleanup;
+  }
+
+  // Trigger an initial resize for convenience.
+  (*g_gfx_app.callbacks.resize)(g_gfx_app.app_state, desc->width, desc->height);
+
+  // Set GLFW callbacks now that the application has been initialized.
+  glfwSetWindowSizeCallback(g_gfx_app.window, on_resize);
+
+  loop(&g_gfx_app);
+
+  (*g_gfx_app.callbacks.shutdown)(g_gfx_app.app_state);
+
+  success = true;
+
+cleanup:
+  if (g_gfx_app.window) {
+    glfwDestroyWindow(g_gfx_app.window);
+  }
+  glfwTerminate();
+  return success;
+}
diff --git a/gfx/CMakeLists.txt b/gfx/CMakeLists.txt
new file mode 100644
index 0000000..e91450b
--- /dev/null
+++ b/gfx/CMakeLists.txt
@@ -0,0 +1,84 @@
+cmake_minimum_required(VERSION 3.0)
+
+include(cmake/shader.txt)
+
+add_subdirectory(contrib/cgltf)
+add_subdirectory(contrib/cgltf-tangents)
+add_subdirectory(contrib/glad)
+add_subdirectory(contrib/stb)
+
+project(gfx)
+
+add_shader_library(shaders
+  shaders/brdf_integration_map.frag
+  shaders/cook_torrance.frag
+  shaders/cook_torrance.vert
+  shaders/cubemap_filtering.vert
+  shaders/debug3d.frag
+  shaders/debug3d.vert
+  shaders/irradiance_map.frag
+  shaders/prefiltered_environment_map.frag
+  shaders/quad.vert
+  shaders/skyquad.frag
+  shaders/skyquad.vert
+  shaders/view_normal_mapped_normals.frag
+  shaders/view_normal_mapped_normals.vert
+  shaders/view_normals.frag
+  shaders/view_normals.vert
+  shaders/view_tangents.frag
+  shaders/view_tangents.vert
+  shaders/view_texture.frag
+  shaders/view_texture.vert)
+
+add_library(gfx
+  src/render/buffer.c
+  src/render/framebuffer.c
+  src/render/geometry.c
+  src/render/render_backend.c
+  src/render/renderbuffer.c
+  src/render/shader_program.c
+  src/render/shader.c
+  src/render/texture.c
+  src/renderer/renderer.c
+  src/scene/camera.c
+  src/scene/light.c
+  src/scene/material.c
+  src/scene/mesh.c
+  src/scene/node.c
+  src/scene/object.c
+  src/scene/scene.c
+  src/scene/scene_memory.c
+  src/error.c
+  src/gfx.c
+  src/util/geometry.c
+  src/util/ibl.c
+  src/util/shader.c
+  src/util/scene.c
+  src/util/skyquad.c
+  src/util/texture.c)
+
+target_include_directories(gfx PUBLIC
+  include)
+
+target_include_directories(gfx PRIVATE
+  src)
+
+target_compile_options(gfx PRIVATE -std=gnu11 -Wall -Wextra -Wpedantic)
+
+target_link_libraries(gfx PUBLIC
+  cstring)
+
+target_link_libraries(gfx PRIVATE
+  cgltf
+  cgltf-tangents
+  glad
+  listpool
+  log
+  math
+  mempool
+  shaders
+  stb
+  # System libraries.
+  GL
+  # Required to initialize GLAD.
+  -ldl)
diff --git a/gfx/README.md b/gfx/README.md
new file mode 100644
index 0000000..97c6ce9
--- /dev/null
+++ b/gfx/README.md
@@ -0,0 +1,71 @@
+# GFX - 3D Rendering Library
+
+A portable 3D rendering library with minimal dependencies written for
+educational purposes.
+
+## Guiding Principles
+
+- Provide a minimal set of functionality necessary for indie games and graphics
+  applications.
+- Provide a minimal interface; physically hide the implementation.
+- Allow for additional future rendering backends (e.g. Vulkan).
+- Strive for a minimal set of dependencies.
+- All dependencies but system libraries should be compiled with the graphics
+  library for portability and ease of use.
+- Rely on dynamic allocation as little as possible. Isolate dynamic allocation
+  to where it is strictly needed.
+
+## Design
+
+### Gfx
+
+The `Gfx` object represents the graphics subsystem and provides a high-level API
+to render graphics. The `Gfx` object exposes a `Render` backend and a `Renderer`
+, and allows the caller to create `Scene` objects.
+
+### Render Backend
+
+The `Render Backend` is a thin abstraction layer over low-level graphics APIs
+(OpenGL, etc). It presents an immediate mode style of rendering, whereby callers
+directly submit draw commands to the `Render Backend`.
+
+The `Render Backend` holds GPU resources such as geometry, textures, shaders,
+etc.
+
+Currently there is only one implementation of the `Render Backend` based on
+OpenGL for simplicity and portability.
+
+#### Ownership
+
+The `Render Backend` owns all rendering resources: buffers, geometries,
+textures, shaders, etc. Even resources that point to other resources do not own
+those other resources (geometries and buffers).
+
+There is no sophisticated resource sharing on the renderer side, like reference
+counting or resource naming. Instead, it is up to the user to make appropriate
+use of allocated resources and share them where appropriate.
+
+### Scene
+
+A `Scene` is the top-level object of a scene graph. A scene graph is a
+description of the scene and holds all of the elements that make up a scene:
+nodes, cameras, lights, objects, etc.
+
+### Renderer
+
+The `Renderer` takes a `Render` backend and a `Scene` and renders the scene.
+Currently, only a forward renderer is provided, but additional renderers can be
+implemented in the future.
+
+## Future Work
+
+- Ideally, some way to customize the rendering pipeline to allow for custom
+  multi-pass rendering algorithms.
+
+## Build (Ubuntu)
+
+```
+sudo apt install libbsd-dev libgl-dev libglfw3-dev zlib1g-dev
+```
+
+TODO: Add GLFW and zlib to `contrib/`.
diff --git a/gfx/bin/txt2c.py b/gfx/bin/txt2c.py
new file mode 100755
index 0000000..1d8ff70
--- /dev/null
+++ b/gfx/bin/txt2c.py
@@ -0,0 +1,62 @@
+#!/usr/bin/python3
+
+import fileinput
+import os
+import sys
+
+
+def escape_quotes(string):
+  return string.replace("\"", '\\"')
+
+
+def escape_newlines(string):
+  return string.replace("\n", "\\n")
+
+
+def quote(string):
+  return "\"" + string + "\""
+
+
+def main():
+  if len(sys.argv) < 3:
+    print("Usage: {} [text files...] [C files...]".format(sys.argv[0]))
+    return 1
+
+  files = sys.argv[1:]
+  assert(len(files) % 2 == 0)
+  N = int(len(files) / 2)
+  text_files = files[:N]
+  c_files = files[N:]
+
+  for i in range(len(text_files)):
+    text_file = text_files[i]
+    c_file = c_files[i]
+    h_file = c_file.replace(".c", ".h")
+    variable_name = os.path.basename(text_file).replace(".", "_")
+
+    os.makedirs(os.path.join(".", os.path.dirname(c_file)), exist_ok=True)
+
+    # Create the C file.
+    with open(c_file, 'w') as out_file:
+      out_file.write("const char {}[] =\n".format(variable_name))
+      pad = "  "
+      with open(text_file, 'r') as in_file:
+        for line in in_file.readlines():
+          line = escape_quotes(line)
+          line = escape_newlines(line)
+          line = quote(line)
+          line = pad + line + "\n"
+          out_file.write(line)
+        out_file.write(pad + "\"\";")
+
+    # Create the header file.
+    with open(h_file, 'w') as out_file:
+      out_file.write("#pragma once\n")
+      out_file.write("\n")
+      out_file.write("extern const char {}[];".format(variable_name))
+
+  return 0
+
+
+if __name__ == '__main__':
+  sys.exit(main())
diff --git a/gfx/cmake/shader.txt b/gfx/cmake/shader.txt
new file mode 100644
index 0000000..8273f4d
--- /dev/null
+++ b/gfx/cmake/shader.txt
@@ -0,0 +1,5 @@
+include(cmake/txt2c.txt)
+
+macro(add_shader_library)
+  txt2c(${ARGN})
+endmacro()
diff --git a/gfx/cmake/txt2c.txt b/gfx/cmake/txt2c.txt
new file mode 100644
index 0000000..0cb11a9
--- /dev/null
+++ b/gfx/cmake/txt2c.txt
@@ -0,0 +1,44 @@
+function(txt2c target)
+  set(BUILD_DIR "${CMAKE_CURRENT_BINARY_DIR}/${target}")
+  file(MAKE_DIRECTORY ${BUILD_DIR})
+  message(${BUILD_DIR})
+
+  set(TEXT_FILES)
+  set(SOURCE_FILES)
+  set(INCLUDE_DIRECTORIES)
+  foreach(filepath IN ITEMS ${ARGN})
+    set(textfile "${CMAKE_CURRENT_SOURCE_DIR}/${filepath}")
+    list(APPEND TEXT_FILES ${textfile})
+
+    set(srcfile "${BUILD_DIR}/${filepath}.c")
+    list(APPEND SOURCE_FILES ${srcfile})
+
+    get_filename_component(include_dir ${srcfile} DIRECTORY)
+    list(APPEND INCLUDE_DIRECTORIES ${include_dir})
+  endforeach()
+
+  foreach(filepath IN ITEMS ${TEXT_FILES})
+    message(${filepath})
+  endforeach()
+
+  foreach(filepath IN ITEMS ${SOURCE_FILES})
+    message(${filepath})
+  endforeach()
+
+  foreach(filepath IN ITEMS ${INCLUDE_DIRECTORIES})
+    message(${filepath})
+  endforeach()
+
+  add_custom_command(OUTPUT ${SOURCE_FILES}
+    COMMAND "${PROJECT_SOURCE_DIR}/bin/txt2c.py" ${TEXT_FILES} ${SOURCE_FILES}
+    WORKING_DIRECTORY ${BUILD_DIR}
+    DEPENDS ${ARGN}
+    COMMENT "Generating ${target}")
+
+  add_library(${target}
+    ${SOURCE_FILES})
+
+  target_include_directories(${target} PUBLIC
+    ${BUILD_DIR}
+    ${INCLUDE_DIRECTORIES})
+endfunction()
diff --git a/gfx/contrib/cgltf-tangents/CMakeLists.txt b/gfx/contrib/cgltf-tangents/CMakeLists.txt
new file mode 100644
index 0000000..2c0771e
--- /dev/null
+++ b/gfx/contrib/cgltf-tangents/CMakeLists.txt
@@ -0,0 +1,13 @@
+cmake_minimum_required(VERSION 3.0)
+
+project(cgltf-tangents)
+
+add_library(cgltf-tangents
+  cgltf_tangents.c
+  MikkTSpace/mikktspace.c)
+
+target_include_directories(cgltf-tangents PUBLIC
+  ${CMAKE_CURRENT_SOURCE_DIR})
+
+target_link_libraries(cgltf-tangents PUBLIC
+  cgltf)
diff --git a/gfx/contrib/cgltf-tangents/LICENSE b/gfx/contrib/cgltf-tangents/LICENSE
new file mode 100644
index 0000000..7796e37
--- /dev/null
+++ b/gfx/contrib/cgltf-tangents/LICENSE
@@ -0,0 +1,79 @@
+This project has two third-party dependencies:
+- MikkTSpace
+- cgltf
+
+The license for this project and its dependencies are included below.
+
+--------------------------------------------------------------------------------
+cgltf-tangents
+--------------------------------------------------------------------------------
+
+Copyright 2022 Marc Sunet
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+this list of conditions and the following disclaimer in the documentation and/or
+other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+--------------------------------------------------------------------------------
+MikkTSpace
+--------------------------------------------------------------------------------
+
+Copyright (C) 2011 by Morten S. Mikkelsen
+
+This software is provided 'as-is', without any express or implied
+warranty.  In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not
+   claim that you wrote the original software. If you use this software
+   in a product, an acknowledgment in the product documentation would be
+   appreciated but is not required.
+
+2. Altered source versions must be plainly marked as such, and must not be
+   misrepresented as being the original software.
+
+3. This notice may not be removed or altered from any source distribution.
+
+--------------------------------------------------------------------------------
+cgltf
+--------------------------------------------------------------------------------
+
+Copyright (c) 2018-2021 Johannes Kuhlmann
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/gfx/contrib/cgltf-tangents/MikkTSpace/README.md b/gfx/contrib/cgltf-tangents/MikkTSpace/README.md
new file mode 100644
index 0000000..9fda155
--- /dev/null
+++ b/gfx/contrib/cgltf-tangents/MikkTSpace/README.md
@@ -0,0 +1,4 @@
+# MikkTSpace
+A common standard for tangent space used in baking tools to produce normal maps.
+
+More information can be found at http://www.mikktspace.com/.
diff --git a/gfx/contrib/cgltf-tangents/MikkTSpace/mikktspace.c b/gfx/contrib/cgltf-tangents/MikkTSpace/mikktspace.c
new file mode 100644
index 0000000..0342ae0
--- /dev/null
+++ b/gfx/contrib/cgltf-tangents/MikkTSpace/mikktspace.c
@@ -0,0 +1,1899 @@
+/** \file mikktspace/mikktspace.c
+ *  \ingroup mikktspace
+ */
+/**
+ *  Copyright (C) 2011 by Morten S. Mikkelsen
+ *
+ *  This software is provided 'as-is', without any express or implied
+ *  warranty.  In no event will the authors be held liable for any damages
+ *  arising from the use of this software.
+ *
+ *  Permission is granted to anyone to use this software for any purpose,
+ *  including commercial applications, and to alter it and redistribute it
+ *  freely, subject to the following restrictions:
+ *
+ *  1. The origin of this software must not be misrepresented; you must not
+ *     claim that you wrote the original software. If you use this software
+ *     in a product, an acknowledgment in the product documentation would be
+ *     appreciated but is not required.
+ *  2. Altered source versions must be plainly marked as such, and must not be
+ *     misrepresented as being the original software.
+ *  3. This notice may not be removed or altered from any source distribution.
+ */
+
+#include <assert.h>
+#include <stdio.h>
+#include <math.h>
+#include <string.h>
+#include <float.h>
+#include <stdlib.h>
+
+#include "mikktspace.h"
+
+#define TFALSE          0
+#define TTRUE           1
+
+#ifndef M_PI
+#define M_PI    3.1415926535897932384626433832795
+#endif
+
+#define INTERNAL_RND_SORT_SEED          39871946
+
+// internal structure
+typedef struct {
+        float x, y, z;
+} SVec3;
+
+static tbool                    veq( const SVec3 v1, const SVec3 v2 )
+{
+        return (v1.x == v2.x) && (v1.y == v2.y) && (v1.z == v2.z);
+}
+
+static SVec3            vadd( const SVec3 v1, const SVec3 v2 )
+{
+        SVec3 vRes;
+
+        vRes.x = v1.x + v2.x;
+        vRes.y = v1.y + v2.y;
+        vRes.z = v1.z + v2.z;
+
+        return vRes;
+}
+
+
+static SVec3            vsub( const SVec3 v1, const SVec3 v2 )
+{
+        SVec3 vRes;
+
+        vRes.x = v1.x - v2.x;
+        vRes.y = v1.y - v2.y;
+        vRes.z = v1.z - v2.z;
+
+        return vRes;
+}
+
+static SVec3            vscale(const float fS, const SVec3 v)
+{
+        SVec3 vRes;
+
+        vRes.x = fS * v.x;
+        vRes.y = fS * v.y;
+        vRes.z = fS * v.z;
+
+        return vRes;
+}
+
+static float                    LengthSquared( const SVec3 v )
+{
+        return v.x*v.x + v.y*v.y + v.z*v.z;
+}
+
+static float                    Length( const SVec3 v )
+{
+        return sqrtf(LengthSquared(v));
+}
+
+static SVec3            Normalize( const SVec3 v )
+{
+        return vscale(1 / Length(v), v);
+}
+
+static float            vdot( const SVec3 v1, const SVec3 v2)
+{
+        return v1.x*v2.x + v1.y*v2.y + v1.z*v2.z;
+}
+
+
+static tbool NotZero(const float fX)
+{
+        // could possibly use FLT_EPSILON instead
+        return fabsf(fX) > FLT_MIN;
+}
+
+static tbool VNotZero(const SVec3 v)
+{
+        // might change this to an epsilon based test
+        return NotZero(v.x) || NotZero(v.y) || NotZero(v.z);
+}
+
+
+
+typedef struct {
+        int iNrFaces;
+        int * pTriMembers;
+} SSubGroup;
+
+typedef struct {
+        int iNrFaces;
+        int * pFaceIndices;
+        int iVertexRepresentitive;
+        tbool bOrientPreservering;
+} SGroup;
+
+// 
+#define MARK_DEGENERATE                         1
+#define QUAD_ONE_DEGEN_TRI                      2
+#define GROUP_WITH_ANY                          4
+#define ORIENT_PRESERVING                       8
+
+
+
+typedef struct {
+        int FaceNeighbors[3];
+        SGroup * AssignedGroup[3];
+        
+        // normalized first order face derivatives
+        SVec3 vOs, vOt;
+        float fMagS, fMagT;     // original magnitudes
+
+        // determines if the current and the next triangle are a quad.
+        int iOrgFaceNumber;
+        int iFlag, iTSpacesOffs;
+        unsigned char vert_num[4];
+} STriInfo;
+
+typedef struct {
+        SVec3 vOs;
+        float fMagS;
+        SVec3 vOt;
+        float fMagT;
+        int iCounter;   // this is to average back into quads.
+        tbool bOrient;
+} STSpace;
+
+static int GenerateInitialVerticesIndexList(STriInfo pTriInfos[], int piTriList_out[], const SMikkTSpaceContext * pContext, const int iNrTrianglesIn);
+static void GenerateSharedVerticesIndexList(int piTriList_in_and_out[], const SMikkTSpaceContext * pContext, const int iNrTrianglesIn);
+static void InitTriInfo(STriInfo pTriInfos[], const int piTriListIn[], const SMikkTSpaceContext * pContext, const int iNrTrianglesIn);
+static int Build4RuleGroups(STriInfo pTriInfos[], SGroup pGroups[], int piGroupTrianglesBuffer[], const int piTriListIn[], const int iNrTrianglesIn);
+static tbool GenerateTSpaces(STSpace psTspace[], const STriInfo pTriInfos[], const SGroup pGroups[],
+                             const int iNrActiveGroups, const int piTriListIn[], const float fThresCos,
+                             const SMikkTSpaceContext * pContext);
+
+static int MakeIndex(const int iFace, const int iVert)
+{
+        assert(iVert>=0 && iVert<4 && iFace>=0);
+        return (iFace<<2) | (iVert&0x3);
+}
+
+static void IndexToData(int * piFace, int * piVert, const int iIndexIn)
+{
+        piVert[0] = iIndexIn&0x3;
+        piFace[0] = iIndexIn>>2;
+}
+
+static STSpace AvgTSpace(const STSpace * pTS0, const STSpace * pTS1)
+{
+        STSpace ts_res;
+
+        // this if is important. Due to floating point precision
+        // averaging when ts0==ts1 will cause a slight difference
+        // which results in tangent space splits later on
+        if (pTS0->fMagS==pTS1->fMagS && pTS0->fMagT==pTS1->fMagT &&
+           veq(pTS0->vOs,pTS1->vOs)     && veq(pTS0->vOt, pTS1->vOt))
+        {
+                ts_res.fMagS = pTS0->fMagS;
+                ts_res.fMagT = pTS0->fMagT;
+                ts_res.vOs = pTS0->vOs;
+                ts_res.vOt = pTS0->vOt;
+        }
+        else
+        {
+                ts_res.fMagS = 0.5f*(pTS0->fMagS+pTS1->fMagS);
+                ts_res.fMagT = 0.5f*(pTS0->fMagT+pTS1->fMagT);
+                ts_res.vOs = vadd(pTS0->vOs,pTS1->vOs);
+                ts_res.vOt = vadd(pTS0->vOt,pTS1->vOt);
+                if ( VNotZero(ts_res.vOs) ) ts_res.vOs = Normalize(ts_res.vOs);
+                if ( VNotZero(ts_res.vOt) ) ts_res.vOt = Normalize(ts_res.vOt);
+        }
+
+        return ts_res;
+}
+
+
+
+static SVec3 GetPosition(const SMikkTSpaceContext * pContext, const int index);
+static SVec3 GetNormal(const SMikkTSpaceContext * pContext, const int index);
+static SVec3 GetTexCoord(const SMikkTSpaceContext * pContext, const int index);
+
+
+// degen triangles
+static void DegenPrologue(STriInfo pTriInfos[], int piTriList_out[], const int iNrTrianglesIn, const int iTotTris);
+static void DegenEpilogue(STSpace psTspace[], STriInfo pTriInfos[], int piTriListIn[], const SMikkTSpaceContext * pContext, const int iNrTrianglesIn, const int iTotTris);
+
+
+tbool genTangSpaceDefault(const SMikkTSpaceContext * pContext)
+{
+        return genTangSpace(pContext, 180.0f);
+}
+
+tbool genTangSpace(const SMikkTSpaceContext * pContext, const float fAngularThreshold)
+{
+        // count nr_triangles
+        int * piTriListIn = NULL, * piGroupTrianglesBuffer = NULL;
+        STriInfo * pTriInfos = NULL;
+        SGroup * pGroups = NULL;
+        STSpace * psTspace = NULL;
+        int iNrTrianglesIn = 0, f=0, t=0, i=0;
+        int iNrTSPaces = 0, iTotTris = 0, iDegenTriangles = 0, iNrMaxGroups = 0;
+        int iNrActiveGroups = 0, index = 0;
+        const int iNrFaces = pContext->m_pInterface->m_getNumFaces(pContext);
+        tbool bRes = TFALSE;
+        const float fThresCos = (float) cos((fAngularThreshold*(float)M_PI)/180.0f);
+
+        // verify all call-backs have been set
+        if ( pContext->m_pInterface->m_getNumFaces==NULL ||
+                pContext->m_pInterface->m_getNumVerticesOfFace==NULL ||
+                pContext->m_pInterface->m_getPosition==NULL ||
+                pContext->m_pInterface->m_getNormal==NULL ||
+                pContext->m_pInterface->m_getTexCoord==NULL )
+                return TFALSE;
+
+        // count triangles on supported faces
+        for (f=0; f<iNrFaces; f++)
+        {
+                const int verts = pContext->m_pInterface->m_getNumVerticesOfFace(pContext, f);
+                if (verts==3) ++iNrTrianglesIn;
+                else if (verts==4) iNrTrianglesIn += 2;
+        }
+        if (iNrTrianglesIn<=0) return TFALSE;
+
+        // allocate memory for an index list
+        piTriListIn = (int *) malloc(sizeof(int)*3*iNrTrianglesIn);
+        pTriInfos = (STriInfo *) malloc(sizeof(STriInfo)*iNrTrianglesIn);
+        if (piTriListIn==NULL || pTriInfos==NULL)
+        {
+                if (piTriListIn!=NULL) free(piTriListIn);
+                if (pTriInfos!=NULL) free(pTriInfos);
+                return TFALSE;
+        }
+
+        // make an initial triangle --> face index list
+        iNrTSPaces = GenerateInitialVerticesIndexList(pTriInfos, piTriListIn, pContext, iNrTrianglesIn);
+
+        // make a welded index list of identical positions and attributes (pos, norm, texc)
+        //printf("gen welded index list begin\n");
+        GenerateSharedVerticesIndexList(piTriListIn, pContext, iNrTrianglesIn);
+        //printf("gen welded index list end\n");
+
+        // Mark all degenerate triangles
+        iTotTris = iNrTrianglesIn;
+        iDegenTriangles = 0;
+        for (t=0; t<iTotTris; t++)
+        {
+                const int i0 = piTriListIn[t*3+0];
+                const int i1 = piTriListIn[t*3+1];
+                const int i2 = piTriListIn[t*3+2];
+                const SVec3 p0 = GetPosition(pContext, i0);
+                const SVec3 p1 = GetPosition(pContext, i1);
+                const SVec3 p2 = GetPosition(pContext, i2);
+                if (veq(p0,p1) || veq(p0,p2) || veq(p1,p2))     // degenerate
+                {
+                        pTriInfos[t].iFlag |= MARK_DEGENERATE;
+                        ++iDegenTriangles;
+                }
+        }
+        iNrTrianglesIn = iTotTris - iDegenTriangles;
+
+        // mark all triangle pairs that belong to a quad with only one
+        // good triangle. These need special treatment in DegenEpilogue().
+        // Additionally, move all good triangles to the start of
+        // pTriInfos[] and piTriListIn[] without changing order and
+        // put the degenerate triangles last.
+        DegenPrologue(pTriInfos, piTriListIn, iNrTrianglesIn, iTotTris);
+
+        
+        // evaluate triangle level attributes and neighbor list
+        //printf("gen neighbors list begin\n");
+        InitTriInfo(pTriInfos, piTriListIn, pContext, iNrTrianglesIn);
+        //printf("gen neighbors list end\n");
+
+        
+        // based on the 4 rules, identify groups based on connectivity
+        iNrMaxGroups = iNrTrianglesIn*3;
+        pGroups = (SGroup *) malloc(sizeof(SGroup)*iNrMaxGroups);
+        piGroupTrianglesBuffer = (int *) malloc(sizeof(int)*iNrTrianglesIn*3);
+        if (pGroups==NULL || piGroupTrianglesBuffer==NULL)
+        {
+                if (pGroups!=NULL) free(pGroups);
+                if (piGroupTrianglesBuffer!=NULL) free(piGroupTrianglesBuffer);
+                free(piTriListIn);
+                free(pTriInfos);
+                return TFALSE;
+        }
+        //printf("gen 4rule groups begin\n");
+        iNrActiveGroups =
+                Build4RuleGroups(pTriInfos, pGroups, piGroupTrianglesBuffer, piTriListIn, iNrTrianglesIn);
+        //printf("gen 4rule groups end\n");
+
+        //
+
+        psTspace = (STSpace *) malloc(sizeof(STSpace)*iNrTSPaces);
+        if (psTspace==NULL)
+        {
+                free(piTriListIn);
+                free(pTriInfos);
+                free(pGroups);
+                free(piGroupTrianglesBuffer);
+                return TFALSE;
+        }
+        memset(psTspace, 0, sizeof(STSpace)*iNrTSPaces);
+        for (t=0; t<iNrTSPaces; t++)
+        {
+                psTspace[t].vOs.x=1.0f; psTspace[t].vOs.y=0.0f; psTspace[t].vOs.z=0.0f; psTspace[t].fMagS = 1.0f;
+                psTspace[t].vOt.x=0.0f; psTspace[t].vOt.y=1.0f; psTspace[t].vOt.z=0.0f; psTspace[t].fMagT = 1.0f;
+        }
+
+        // make tspaces, each group is split up into subgroups if necessary
+        // based on fAngularThreshold. Finally a tangent space is made for
+        // every resulting subgroup
+        //printf("gen tspaces begin\n");
+        bRes = GenerateTSpaces(psTspace, pTriInfos, pGroups, iNrActiveGroups, piTriListIn, fThresCos, pContext);
+        //printf("gen tspaces end\n");
+        
+        // clean up
+        free(pGroups);
+        free(piGroupTrianglesBuffer);
+
+        if (!bRes)      // if an allocation in GenerateTSpaces() failed
+        {
+                // clean up and return false
+                free(pTriInfos); free(piTriListIn); free(psTspace);
+                return TFALSE;
+        }
+
+
+        // degenerate quads with one good triangle will be fixed by copying a space from
+        // the good triangle to the coinciding vertex.
+        // all other degenerate triangles will just copy a space from any good triangle
+        // with the same welded index in piTriListIn[].
+        DegenEpilogue(psTspace, pTriInfos, piTriListIn, pContext, iNrTrianglesIn, iTotTris);
+
+        free(pTriInfos); free(piTriListIn);
+
+        index = 0;
+        for (f=0; f<iNrFaces; f++)
+        {
+                const int verts = pContext->m_pInterface->m_getNumVerticesOfFace(pContext, f);
+                if (verts!=3 && verts!=4) continue;
+                
+
+                // I've decided to let degenerate triangles and group-with-anythings
+                // vary between left/right hand coordinate systems at the vertices.
+                // All healthy triangles on the other hand are built to always be either or.
+
+                /*// force the coordinate system orientation to be uniform for every face.
+                // (this is already the case for good triangles but not for
+                // degenerate ones and those with bGroupWithAnything==true)
+                bool bOrient = psTspace[index].bOrient;
+                if (psTspace[index].iCounter == 0)      // tspace was not derived from a group
+                {
+                        // look for a space created in GenerateTSpaces() by iCounter>0
+                        bool bNotFound = true;
+                        int i=1;
+                        while (i<verts && bNotFound)
+                        {
+                                if (psTspace[index+i].iCounter > 0) bNotFound=false;
+                                else ++i;
+                        }
+                        if (!bNotFound) bOrient = psTspace[index+i].bOrient;
+                }*/
+
+                // set data
+                for (i=0; i<verts; i++)
+                {
+                        const STSpace * pTSpace = &psTspace[index];
+                        float tang[] = {pTSpace->vOs.x, pTSpace->vOs.y, pTSpace->vOs.z};
+                        float bitang[] = {pTSpace->vOt.x, pTSpace->vOt.y, pTSpace->vOt.z};
+                        if (pContext->m_pInterface->m_setTSpace!=NULL)
+                                pContext->m_pInterface->m_setTSpace(pContext, tang, bitang, pTSpace->fMagS, pTSpace->fMagT, pTSpace->bOrient, f, i);
+                        if (pContext->m_pInterface->m_setTSpaceBasic!=NULL)
+                                pContext->m_pInterface->m_setTSpaceBasic(pContext, tang, pTSpace->bOrient==TTRUE ? 1.0f : (-1.0f), f, i);
+
+                        ++index;
+                }
+        }
+
+        free(psTspace);
+
+        
+        return TTRUE;
+}
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+typedef struct {
+        float vert[3];
+        int index;
+} STmpVert;
+
+static const int g_iCells = 2048;
+
+#ifdef _MSC_VER
+#  define NOINLINE __declspec(noinline)
+#else
+#  define NOINLINE __attribute__ ((noinline))
+#endif
+
+// it is IMPORTANT that this function is called to evaluate the hash since
+// inlining could potentially reorder instructions and generate different
+// results for the same effective input value fVal.
+static NOINLINE int FindGridCell(const float fMin, const float fMax, const float fVal)
+{
+        const float fIndex = g_iCells * ((fVal-fMin)/(fMax-fMin));
+        const int iIndex = (int)fIndex;
+        return iIndex < g_iCells ? (iIndex >= 0 ? iIndex : 0) : (g_iCells - 1);
+}
+
+static void MergeVertsFast(int piTriList_in_and_out[], STmpVert pTmpVert[], const SMikkTSpaceContext * pContext, const int iL_in, const int iR_in);
+static void MergeVertsSlow(int piTriList_in_and_out[], const SMikkTSpaceContext * pContext, const int pTable[], const int iEntries);
+static void GenerateSharedVerticesIndexListSlow(int piTriList_in_and_out[], const SMikkTSpaceContext * pContext, const int iNrTrianglesIn);
+
+static void GenerateSharedVerticesIndexList(int piTriList_in_and_out[], const SMikkTSpaceContext * pContext, const int iNrTrianglesIn)
+{
+
+        // Generate bounding box
+        int * piHashTable=NULL, * piHashCount=NULL, * piHashOffsets=NULL, * piHashCount2=NULL;
+        STmpVert * pTmpVert = NULL;
+        int i=0, iChannel=0, k=0, e=0;
+        int iMaxCount=0;
+        SVec3 vMin = GetPosition(pContext, 0), vMax = vMin, vDim;
+        float fMin, fMax;
+        for (i=1; i<(iNrTrianglesIn*3); i++)
+        {
+                const int index = piTriList_in_and_out[i];
+
+                const SVec3 vP = GetPosition(pContext, index);
+                if (vMin.x > vP.x) vMin.x = vP.x;
+                else if (vMax.x < vP.x) vMax.x = vP.x;
+                if (vMin.y > vP.y) vMin.y = vP.y;
+                else if (vMax.y < vP.y) vMax.y = vP.y;
+                if (vMin.z > vP.z) vMin.z = vP.z;
+                else if (vMax.z < vP.z) vMax.z = vP.z;
+        }
+
+        vDim = vsub(vMax,vMin);
+        iChannel = 0;
+        fMin = vMin.x; fMax=vMax.x;
+        if (vDim.y>vDim.x && vDim.y>vDim.z)
+        {
+                iChannel=1;
+                fMin = vMin.y;
+                fMax = vMax.y;
+        }
+        else if (vDim.z>vDim.x)
+        {
+                iChannel=2;
+                fMin = vMin.z;
+                fMax = vMax.z;
+        }
+
+        // make allocations
+        piHashTable = (int *) malloc(sizeof(int)*iNrTrianglesIn*3);
+        piHashCount = (int *) malloc(sizeof(int)*g_iCells);
+        piHashOffsets = (int *) malloc(sizeof(int)*g_iCells);
+        piHashCount2 = (int *) malloc(sizeof(int)*g_iCells);
+
+        if (piHashTable==NULL || piHashCount==NULL || piHashOffsets==NULL || piHashCount2==NULL)
+        {
+                if (piHashTable!=NULL) free(piHashTable);
+                if (piHashCount!=NULL) free(piHashCount);
+                if (piHashOffsets!=NULL) free(piHashOffsets);
+                if (piHashCount2!=NULL) free(piHashCount2);
+                GenerateSharedVerticesIndexListSlow(piTriList_in_and_out, pContext, iNrTrianglesIn);
+                return;
+        }
+        memset(piHashCount, 0, sizeof(int)*g_iCells);
+        memset(piHashCount2, 0, sizeof(int)*g_iCells);
+
+        // count amount of elements in each cell unit
+        for (i=0; i<(iNrTrianglesIn*3); i++)
+        {
+                const int index = piTriList_in_and_out[i];
+                const SVec3 vP = GetPosition(pContext, index);
+                const float fVal = iChannel==0 ? vP.x : (iChannel==1 ? vP.y : vP.z);
+                const int iCell = FindGridCell(fMin, fMax, fVal);
+                ++piHashCount[iCell];
+        }
+
+        // evaluate start index of each cell.
+        piHashOffsets[0]=0;
+        for (k=1; k<g_iCells; k++)
+                piHashOffsets[k]=piHashOffsets[k-1]+piHashCount[k-1];
+
+        // insert vertices
+        for (i=0; i<(iNrTrianglesIn*3); i++)
+        {
+                const int index = piTriList_in_and_out[i];
+                const SVec3 vP = GetPosition(pContext, index);
+                const float fVal = iChannel==0 ? vP.x : (iChannel==1 ? vP.y : vP.z);
+                const int iCell = FindGridCell(fMin, fMax, fVal);
+                int * pTable = NULL;
+
+                assert(piHashCount2[iCell]<piHashCount[iCell]);
+                pTable = &piHashTable[piHashOffsets[iCell]];
+                pTable[piHashCount2[iCell]] = i;        // vertex i has been inserted.
+                ++piHashCount2[iCell];
+        }
+        for (k=0; k<g_iCells; k++)
+                assert(piHashCount2[k] == piHashCount[k]);      // verify the count
+        free(piHashCount2);
+
+        // find maximum amount of entries in any hash entry
+        iMaxCount = piHashCount[0];
+        for (k=1; k<g_iCells; k++)
+                if (iMaxCount<piHashCount[k])
+                        iMaxCount=piHashCount[k];
+        pTmpVert = (STmpVert *) malloc(sizeof(STmpVert)*iMaxCount);
+        
+
+        // complete the merge
+        for (k=0; k<g_iCells; k++)
+        {
+                // extract table of cell k and amount of entries in it
+                int * pTable = &piHashTable[piHashOffsets[k]];
+                const int iEntries = piHashCount[k];
+                if (iEntries < 2) continue;
+
+                if (pTmpVert!=NULL)
+                {
+                        for (e=0; e<iEntries; e++)
+                        {
+                                int i = pTable[e];
+                                const SVec3 vP = GetPosition(pContext, piTriList_in_and_out[i]);
+                                pTmpVert[e].vert[0] = vP.x; pTmpVert[e].vert[1] = vP.y;
+                                pTmpVert[e].vert[2] = vP.z; pTmpVert[e].index = i;
+                        }
+                        MergeVertsFast(piTriList_in_and_out, pTmpVert, pContext, 0, iEntries-1);
+                }
+                else
+                        MergeVertsSlow(piTriList_in_and_out, pContext, pTable, iEntries);
+        }
+
+        if (pTmpVert!=NULL) { free(pTmpVert); }
+        free(piHashTable);
+        free(piHashCount);
+        free(piHashOffsets);
+}
+
+static void MergeVertsFast(int piTriList_in_and_out[], STmpVert pTmpVert[], const SMikkTSpaceContext * pContext, const int iL_in, const int iR_in)
+{
+        // make bbox
+        int c=0, l=0, channel=0;
+        float fvMin[3], fvMax[3];
+        float dx=0, dy=0, dz=0, fSep=0;
+        for (c=0; c<3; c++)
+        {       fvMin[c]=pTmpVert[iL_in].vert[c]; fvMax[c]=fvMin[c];    }
+        for (l=(iL_in+1); l<=iR_in; l++) {
+                for (c=0; c<3; c++) {
+                        if (fvMin[c]>pTmpVert[l].vert[c]) fvMin[c]=pTmpVert[l].vert[c];
+                        if (fvMax[c]<pTmpVert[l].vert[c]) fvMax[c]=pTmpVert[l].vert[c];
+                }
+        }
+
+        dx = fvMax[0]-fvMin[0];
+        dy = fvMax[1]-fvMin[1];
+        dz = fvMax[2]-fvMin[2];
+
+        channel = 0;
+        if (dy>dx && dy>dz) channel=1;
+        else if (dz>dx) channel=2;
+
+        fSep = 0.5f*(fvMax[channel]+fvMin[channel]);
+
+        // stop if all vertices are NaNs
+        if (!isfinite(fSep))
+                return;
+
+        // terminate recursion when the separation/average value
+        // is no longer strictly between fMin and fMax values.
+        if (fSep>=fvMax[channel] || fSep<=fvMin[channel])
+        {
+                // complete the weld
+                for (l=iL_in; l<=iR_in; l++)
+                {
+                        int i = pTmpVert[l].index;
+                        const int index = piTriList_in_and_out[i];
+                        const SVec3 vP = GetPosition(pContext, index);
+                        const SVec3 vN = GetNormal(pContext, index);
+                        const SVec3 vT = GetTexCoord(pContext, index);
+
+                        tbool bNotFound = TTRUE;
+                        int l2=iL_in, i2rec=-1;
+                        while (l2<l && bNotFound)
+                        {
+                                const int i2 = pTmpVert[l2].index;
+                                const int index2 = piTriList_in_and_out[i2];
+                                const SVec3 vP2 = GetPosition(pContext, index2);
+                                const SVec3 vN2 = GetNormal(pContext, index2);
+                                const SVec3 vT2 = GetTexCoord(pContext, index2);
+                                i2rec=i2;
+
+                                //if (vP==vP2 && vN==vN2 && vT==vT2)
+                                if (vP.x==vP2.x && vP.y==vP2.y && vP.z==vP2.z &&
+                                        vN.x==vN2.x && vN.y==vN2.y && vN.z==vN2.z &&
+                                        vT.x==vT2.x && vT.y==vT2.y && vT.z==vT2.z)
+                                        bNotFound = TFALSE;
+                                else
+                                        ++l2;
+                        }
+                        
+                        // merge if previously found
+                        if (!bNotFound)
+                                piTriList_in_and_out[i] = piTriList_in_and_out[i2rec];
+                }
+        }
+        else
+        {
+                int iL=iL_in, iR=iR_in;
+                assert((iR_in-iL_in)>0);        // at least 2 entries
+
+                // separate (by fSep) all points between iL_in and iR_in in pTmpVert[]
+                while (iL < iR)
+                {
+                        tbool bReadyLeftSwap = TFALSE, bReadyRightSwap = TFALSE;
+                        while ((!bReadyLeftSwap) && iL<iR)
+                        {
+                                assert(iL>=iL_in && iL<=iR_in);
+                                bReadyLeftSwap = !(pTmpVert[iL].vert[channel]<fSep);
+                                if (!bReadyLeftSwap) ++iL;
+                        }
+                        while ((!bReadyRightSwap) && iL<iR)
+                        {
+                                assert(iR>=iL_in && iR<=iR_in);
+                                bReadyRightSwap = pTmpVert[iR].vert[channel]<fSep;
+                                if (!bReadyRightSwap) --iR;
+                        }
+                        assert( (iL<iR) || !(bReadyLeftSwap && bReadyRightSwap) );
+
+                        if (bReadyLeftSwap && bReadyRightSwap)
+                        {
+                                const STmpVert sTmp = pTmpVert[iL];
+                                assert(iL<iR);
+                                pTmpVert[iL] = pTmpVert[iR];
+                                pTmpVert[iR] = sTmp;
+                                ++iL; --iR;
+                        }
+                }
+
+                assert(iL==(iR+1) || (iL==iR));
+                if (iL==iR)
+                {
+                        const tbool bReadyRightSwap = pTmpVert[iR].vert[channel]<fSep;
+                        if (bReadyRightSwap) ++iL;
+                        else --iR;
+                }
+
+                // only need to weld when there is more than 1 instance of the (x,y,z)
+                if (iL_in < iR)
+                        MergeVertsFast(piTriList_in_and_out, pTmpVert, pContext, iL_in, iR);    // weld all left of fSep
+                if (iL < iR_in)
+                        MergeVertsFast(piTriList_in_and_out, pTmpVert, pContext, iL, iR_in);    // weld all right of (or equal to) fSep
+        }
+}
+
+static void MergeVertsSlow(int piTriList_in_and_out[], const SMikkTSpaceContext * pContext, const int pTable[], const int iEntries)
+{
+        // this can be optimized further using a tree structure or more hashing.
+        int e=0;
+        for (e=0; e<iEntries; e++)
+        {
+                int i = pTable[e];
+                const int index = piTriList_in_and_out[i];
+                const SVec3 vP = GetPosition(pContext, index);
+                const SVec3 vN = GetNormal(pContext, index);
+                const SVec3 vT = GetTexCoord(pContext, index);
+
+                tbool bNotFound = TTRUE;
+                int e2=0, i2rec=-1;
+                while (e2<e && bNotFound)
+                {
+                        const int i2 = pTable[e2];
+                        const int index2 = piTriList_in_and_out[i2];
+                        const SVec3 vP2 = GetPosition(pContext, index2);
+                        const SVec3 vN2 = GetNormal(pContext, index2);
+                        const SVec3 vT2 = GetTexCoord(pContext, index2);
+                        i2rec = i2;
+
+                        if (veq(vP,vP2) && veq(vN,vN2) && veq(vT,vT2))
+                                bNotFound = TFALSE;
+                        else
+                                ++e2;
+                }
+                
+                // merge if previously found
+                if (!bNotFound)
+                        piTriList_in_and_out[i] = piTriList_in_and_out[i2rec];
+        }
+}
+
+static void GenerateSharedVerticesIndexListSlow(int piTriList_in_and_out[], const SMikkTSpaceContext * pContext, const int iNrTrianglesIn)
+{
+        int iNumUniqueVerts = 0, t=0, i=0;
+        for (t=0; t<iNrTrianglesIn; t++)
+        {
+                for (i=0; i<3; i++)
+                {
+                        const int offs = t*3 + i;
+                        const int index = piTriList_in_and_out[offs];
+
+                        const SVec3 vP = GetPosition(pContext, index);
+                        const SVec3 vN = GetNormal(pContext, index);
+                        const SVec3 vT = GetTexCoord(pContext, index);
+
+                        tbool bFound = TFALSE;
+                        int t2=0, index2rec=-1;
+                        while (!bFound && t2<=t)
+                        {
+                                int j=0;
+                                while (!bFound && j<3)
+                                {
+                                        const int index2 = piTriList_in_and_out[t2*3 + j];
+                                        const SVec3 vP2 = GetPosition(pContext, index2);
+                                        const SVec3 vN2 = GetNormal(pContext, index2);
+                                        const SVec3 vT2 = GetTexCoord(pContext, index2);
+                                        
+                                        if (veq(vP,vP2) && veq(vN,vN2) && veq(vT,vT2))
+                                                bFound = TTRUE;
+                                        else
+                                                ++j;
+                                }
+                                if (!bFound) ++t2;
+                        }
+
+                        assert(bFound);
+                        // if we found our own
+                        if (index2rec == index) { ++iNumUniqueVerts; }
+
+                        piTriList_in_and_out[offs] = index2rec;
+                }
+        }
+}
+
+static int GenerateInitialVerticesIndexList(STriInfo pTriInfos[], int piTriList_out[], const SMikkTSpaceContext * pContext, const int iNrTrianglesIn)
+{
+        int iTSpacesOffs = 0, f=0, t=0;
+        int iDstTriIndex = 0;
+        for (f=0; f<pContext->m_pInterface->m_getNumFaces(pContext); f++)
+        {
+                const int verts = pContext->m_pInterface->m_getNumVerticesOfFace(pContext, f);
+                if (verts!=3 && verts!=4) continue;
+
+                pTriInfos[iDstTriIndex].iOrgFaceNumber = f;
+                pTriInfos[iDstTriIndex].iTSpacesOffs = iTSpacesOffs;
+
+                if (verts==3)
+                {
+                        unsigned char * pVerts = pTriInfos[iDstTriIndex].vert_num;
+                        pVerts[0]=0; pVerts[1]=1; pVerts[2]=2;
+                        piTriList_out[iDstTriIndex*3+0] = MakeIndex(f, 0);
+                        piTriList_out[iDstTriIndex*3+1] = MakeIndex(f, 1);
+                        piTriList_out[iDstTriIndex*3+2] = MakeIndex(f, 2);
+                        ++iDstTriIndex; // next
+                }
+                else
+                {
+                        {
+                                pTriInfos[iDstTriIndex+1].iOrgFaceNumber = f;
+                                pTriInfos[iDstTriIndex+1].iTSpacesOffs = iTSpacesOffs;
+                        }
+
+                        {
+                                // need an order independent way to evaluate
+                                // tspace on quads. This is done by splitting
+                                // along the shortest diagonal.
+                                const int i0 = MakeIndex(f, 0);
+                                const int i1 = MakeIndex(f, 1);
+                                const int i2 = MakeIndex(f, 2);
+                                const int i3 = MakeIndex(f, 3);
+                                const SVec3 T0 = GetTexCoord(pContext, i0);
+                                const SVec3 T1 = GetTexCoord(pContext, i1);
+                                const SVec3 T2 = GetTexCoord(pContext, i2);
+                                const SVec3 T3 = GetTexCoord(pContext, i3);
+                                const float distSQ_02 = LengthSquared(vsub(T2,T0));
+                                const float distSQ_13 = LengthSquared(vsub(T3,T1));
+                                tbool bQuadDiagIs_02;
+                                if (distSQ_02<distSQ_13)
+                                        bQuadDiagIs_02 = TTRUE;
+                                else if (distSQ_13<distSQ_02)
+                                        bQuadDiagIs_02 = TFALSE;
+                                else
+                                {
+                                        const SVec3 P0 = GetPosition(pContext, i0);
+                                        const SVec3 P1 = GetPosition(pContext, i1);
+                                        const SVec3 P2 = GetPosition(pContext, i2);
+                                        const SVec3 P3 = GetPosition(pContext, i3);
+                                        const float distSQ_02 = LengthSquared(vsub(P2,P0));
+                                        const float distSQ_13 = LengthSquared(vsub(P3,P1));
+
+                                        bQuadDiagIs_02 = distSQ_13<distSQ_02 ? TFALSE : TTRUE;
+                                }
+
+                                if (bQuadDiagIs_02)
+                                {
+                                        {
+                                                unsigned char * pVerts_A = pTriInfos[iDstTriIndex].vert_num;
+                                                pVerts_A[0]=0; pVerts_A[1]=1; pVerts_A[2]=2;
+                                        }
+                                        piTriList_out[iDstTriIndex*3+0] = i0;
+                                        piTriList_out[iDstTriIndex*3+1] = i1;
+                                        piTriList_out[iDstTriIndex*3+2] = i2;
+                                        ++iDstTriIndex; // next
+                                        {
+                                                unsigned char * pVerts_B = pTriInfos[iDstTriIndex].vert_num;
+                                                pVerts_B[0]=0; pVerts_B[1]=2; pVerts_B[2]=3;
+                                        }
+                                        piTriList_out[iDstTriIndex*3+0] = i0;
+                                        piTriList_out[iDstTriIndex*3+1] = i2;
+                                        piTriList_out[iDstTriIndex*3+2] = i3;
+                                        ++iDstTriIndex; // next
+                                }
+                                else
+                                {
+                                        {
+                                                unsigned char * pVerts_A = pTriInfos[iDstTriIndex].vert_num;
+                                                pVerts_A[0]=0; pVerts_A[1]=1; pVerts_A[2]=3;
+                                        }
+                                        piTriList_out[iDstTriIndex*3+0] = i0;
+                                        piTriList_out[iDstTriIndex*3+1] = i1;
+                                        piTriList_out[iDstTriIndex*3+2] = i3;
+                                        ++iDstTriIndex; // next
+                                        {
+                                                unsigned char * pVerts_B = pTriInfos[iDstTriIndex].vert_num;
+                                                pVerts_B[0]=1; pVerts_B[1]=2; pVerts_B[2]=3;
+                                        }
+                                        piTriList_out[iDstTriIndex*3+0] = i1;
+                                        piTriList_out[iDstTriIndex*3+1] = i2;
+                                        piTriList_out[iDstTriIndex*3+2] = i3;
+                                        ++iDstTriIndex; // next
+                                }
+                        }
+                }
+
+                iTSpacesOffs += verts;
+                assert(iDstTriIndex<=iNrTrianglesIn);
+        }
+
+        for (t=0; t<iNrTrianglesIn; t++)
+                pTriInfos[t].iFlag = 0;
+
+        // return total amount of tspaces
+        return iTSpacesOffs;
+}
+
+static SVec3 GetPosition(const SMikkTSpaceContext * pContext, const int index)
+{
+        int iF, iI;
+        SVec3 res; float pos[3];
+        IndexToData(&iF, &iI, index);
+        pContext->m_pInterface->m_getPosition(pContext, pos, iF, iI);
+        res.x=pos[0]; res.y=pos[1]; res.z=pos[2];
+        return res;
+}
+
+static SVec3 GetNormal(const SMikkTSpaceContext * pContext, const int index)
+{
+        int iF, iI;
+        SVec3 res; float norm[3];
+        IndexToData(&iF, &iI, index);
+        pContext->m_pInterface->m_getNormal(pContext, norm, iF, iI);
+        res.x=norm[0]; res.y=norm[1]; res.z=norm[2];
+        return res;
+}
+
+static SVec3 GetTexCoord(const SMikkTSpaceContext * pContext, const int index)
+{
+        int iF, iI;
+        SVec3 res; float texc[2];
+        IndexToData(&iF, &iI, index);
+        pContext->m_pInterface->m_getTexCoord(pContext, texc, iF, iI);
+        res.x=texc[0]; res.y=texc[1]; res.z=1.0f;
+        return res;
+}
+
+/////////////////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////////////////
+
+typedef union {
+        struct
+        {
+                int i0, i1, f;
+        };
+        int array[3];
+} SEdge;
+
+static void BuildNeighborsFast(STriInfo pTriInfos[], SEdge * pEdges, const int piTriListIn[], const int iNrTrianglesIn);
+static void BuildNeighborsSlow(STriInfo pTriInfos[], const int piTriListIn[], const int iNrTrianglesIn);
+
+// returns the texture area times 2
+static float CalcTexArea(const SMikkTSpaceContext * pContext, const int indices[])
+{
+        const SVec3 t1 = GetTexCoord(pContext, indices[0]);
+        const SVec3 t2 = GetTexCoord(pContext, indices[1]);
+        const SVec3 t3 = GetTexCoord(pContext, indices[2]);
+
+        const float t21x = t2.x-t1.x;
+        const float t21y = t2.y-t1.y;
+        const float t31x = t3.x-t1.x;
+        const float t31y = t3.y-t1.y;
+
+        const float fSignedAreaSTx2 = t21x*t31y - t21y*t31x;
+
+        return fSignedAreaSTx2<0 ? (-fSignedAreaSTx2) : fSignedAreaSTx2;
+}
+
+static void InitTriInfo(STriInfo pTriInfos[], const int piTriListIn[], const SMikkTSpaceContext * pContext, const int iNrTrianglesIn)
+{
+        int f=0, i=0, t=0;
+        // pTriInfos[f].iFlag is cleared in GenerateInitialVerticesIndexList() which is called before this function.
+
+        // generate neighbor info list
+        for (f=0; f<iNrTrianglesIn; f++)
+                for (i=0; i<3; i++)
+                {
+                        pTriInfos[f].FaceNeighbors[i] = -1;
+                        pTriInfos[f].AssignedGroup[i] = NULL;
+
+                        pTriInfos[f].vOs.x=0.0f; pTriInfos[f].vOs.y=0.0f; pTriInfos[f].vOs.z=0.0f;
+                        pTriInfos[f].vOt.x=0.0f; pTriInfos[f].vOt.y=0.0f; pTriInfos[f].vOt.z=0.0f;
+                        pTriInfos[f].fMagS = 0;
+                        pTriInfos[f].fMagT = 0;
+
+                        // assumed bad
+                        pTriInfos[f].iFlag |= GROUP_WITH_ANY;
+                }
+
+        // evaluate first order derivatives
+        for (f=0; f<iNrTrianglesIn; f++)
+        {
+                // initial values
+                const SVec3 v1 = GetPosition(pContext, piTriListIn[f*3+0]);
+                const SVec3 v2 = GetPosition(pContext, piTriListIn[f*3+1]);
+                const SVec3 v3 = GetPosition(pContext, piTriListIn[f*3+2]);
+                const SVec3 t1 = GetTexCoord(pContext, piTriListIn[f*3+0]);
+                const SVec3 t2 = GetTexCoord(pContext, piTriListIn[f*3+1]);
+                const SVec3 t3 = GetTexCoord(pContext, piTriListIn[f*3+2]);
+
+                const float t21x = t2.x-t1.x;
+                const float t21y = t2.y-t1.y;
+                const float t31x = t3.x-t1.x;
+                const float t31y = t3.y-t1.y;
+                const SVec3 d1 = vsub(v2,v1);
+                const SVec3 d2 = vsub(v3,v1);
+
+                const float fSignedAreaSTx2 = t21x*t31y - t21y*t31x;
+                //assert(fSignedAreaSTx2!=0);
+                SVec3 vOs = vsub(vscale(t31y,d1), vscale(t21y,d2));     // eq 18
+                SVec3 vOt = vadd(vscale(-t31x,d1), vscale(t21x,d2)); // eq 19
+
+                pTriInfos[f].iFlag |= (fSignedAreaSTx2>0 ? ORIENT_PRESERVING : 0);
+
+                if ( NotZero(fSignedAreaSTx2) )
+                {
+                        const float fAbsArea = fabsf(fSignedAreaSTx2);
+                        const float fLenOs = Length(vOs);
+                        const float fLenOt = Length(vOt);
+                        const float fS = (pTriInfos[f].iFlag&ORIENT_PRESERVING)==0 ? (-1.0f) : 1.0f;
+                        if ( NotZero(fLenOs) ) pTriInfos[f].vOs = vscale(fS/fLenOs, vOs);
+                        if ( NotZero(fLenOt) ) pTriInfos[f].vOt = vscale(fS/fLenOt, vOt);
+
+                        // evaluate magnitudes prior to normalization of vOs and vOt
+                        pTriInfos[f].fMagS = fLenOs / fAbsArea;
+                        pTriInfos[f].fMagT = fLenOt / fAbsArea;
+
+                        // if this is a good triangle
+                        if ( NotZero(pTriInfos[f].fMagS) && NotZero(pTriInfos[f].fMagT))
+                                pTriInfos[f].iFlag &= (~GROUP_WITH_ANY);
+                }
+        }
+
+        // force otherwise healthy quads to a fixed orientation
+        while (t<(iNrTrianglesIn-1))
+        {
+                const int iFO_a = pTriInfos[t].iOrgFaceNumber;
+                const int iFO_b = pTriInfos[t+1].iOrgFaceNumber;
+                if (iFO_a==iFO_b)       // this is a quad
+                {
+                        const tbool bIsDeg_a = (pTriInfos[t].iFlag&MARK_DEGENERATE)!=0 ? TTRUE : TFALSE;
+                        const tbool bIsDeg_b = (pTriInfos[t+1].iFlag&MARK_DEGENERATE)!=0 ? TTRUE : TFALSE;
+                        
+                        // bad triangles should already have been removed by
+                        // DegenPrologue(), but just in case check bIsDeg_a and bIsDeg_a are false
+                        if ((bIsDeg_a||bIsDeg_b)==TFALSE)
+                        {
+                                const tbool bOrientA = (pTriInfos[t].iFlag&ORIENT_PRESERVING)!=0 ? TTRUE : TFALSE;
+                                const tbool bOrientB = (pTriInfos[t+1].iFlag&ORIENT_PRESERVING)!=0 ? TTRUE : TFALSE;
+                                // if this happens the quad has extremely bad mapping!!
+                                if (bOrientA!=bOrientB)
+                                {
+                                        //printf("found quad with bad mapping\n");
+                                        tbool bChooseOrientFirstTri = TFALSE;
+                                        if ((pTriInfos[t+1].iFlag&GROUP_WITH_ANY)!=0) bChooseOrientFirstTri = TTRUE;
+                                        else if ( CalcTexArea(pContext, &piTriListIn[t*3+0]) >= CalcTexArea(pContext, &piTriListIn[(t+1)*3+0]) )
+                                                bChooseOrientFirstTri = TTRUE;
+
+                                        // force match
+                                        {
+                                                const int t0 = bChooseOrientFirstTri ? t : (t+1);
+                                                const int t1 = bChooseOrientFirstTri ? (t+1) : t;
+                                                pTriInfos[t1].iFlag &= (~ORIENT_PRESERVING);    // clear first
+                                                pTriInfos[t1].iFlag |= (pTriInfos[t0].iFlag&ORIENT_PRESERVING); // copy bit
+                                        }
+                                }
+                        }
+                        t += 2;
+                }
+                else
+                        ++t;
+        }
+        
+        // match up edge pairs
+        {
+                SEdge * pEdges = (SEdge *) malloc(sizeof(SEdge)*iNrTrianglesIn*3);
+                if (pEdges==NULL)
+                        BuildNeighborsSlow(pTriInfos, piTriListIn, iNrTrianglesIn);
+                else
+                {
+                        BuildNeighborsFast(pTriInfos, pEdges, piTriListIn, iNrTrianglesIn);
+        
+                        free(pEdges);
+                }
+        }
+}
+
+/////////////////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////////////////
+
+static tbool AssignRecur(const int piTriListIn[], STriInfo psTriInfos[], const int iMyTriIndex, SGroup * pGroup);
+static void AddTriToGroup(SGroup * pGroup, const int iTriIndex);
+
+static int Build4RuleGroups(STriInfo pTriInfos[], SGroup pGroups[], int piGroupTrianglesBuffer[], const int piTriListIn[], const int iNrTrianglesIn)
+{
+        const int iNrMaxGroups = iNrTrianglesIn*3;
+        int iNrActiveGroups = 0;
+        int iOffset = 0, f=0, i=0;
+        (void)iNrMaxGroups;  /* quiet warnings in non debug mode */
+        for (f=0; f<iNrTrianglesIn; f++)
+        {
+                for (i=0; i<3; i++)
+                {
+                        // if not assigned to a group
+                        if ((pTriInfos[f].iFlag&GROUP_WITH_ANY)==0 && pTriInfos[f].AssignedGroup[i]==NULL)
+                        {
+                                tbool bOrPre;
+                                int neigh_indexL, neigh_indexR;
+                                const int vert_index = piTriListIn[f*3+i];
+                                assert(iNrActiveGroups<iNrMaxGroups);
+                                pTriInfos[f].AssignedGroup[i] = &pGroups[iNrActiveGroups];
+                                pTriInfos[f].AssignedGroup[i]->iVertexRepresentitive = vert_index;
+                                pTriInfos[f].AssignedGroup[i]->bOrientPreservering = (pTriInfos[f].iFlag&ORIENT_PRESERVING)!=0;
+                                pTriInfos[f].AssignedGroup[i]->iNrFaces = 0;
+                                pTriInfos[f].AssignedGroup[i]->pFaceIndices = &piGroupTrianglesBuffer[iOffset];
+                                ++iNrActiveGroups;
+
+                                AddTriToGroup(pTriInfos[f].AssignedGroup[i], f);
+                                bOrPre = (pTriInfos[f].iFlag&ORIENT_PRESERVING)!=0 ? TTRUE : TFALSE;
+                                neigh_indexL = pTriInfos[f].FaceNeighbors[i];
+                                neigh_indexR = pTriInfos[f].FaceNeighbors[i>0?(i-1):2];
+                                if (neigh_indexL>=0) // neighbor
+                                {
+                                        const tbool bAnswer =
+                                                AssignRecur(piTriListIn, pTriInfos, neigh_indexL,
+                                                                        pTriInfos[f].AssignedGroup[i] );
+                                        
+                                        const tbool bOrPre2 = (pTriInfos[neigh_indexL].iFlag&ORIENT_PRESERVING)!=0 ? TTRUE : TFALSE;
+                                        const tbool bDiff = bOrPre!=bOrPre2 ? TTRUE : TFALSE;
+                                        assert(bAnswer || bDiff);
+                                        (void)bAnswer, (void)bDiff;  /* quiet warnings in non debug mode */
+                                }
+                                if (neigh_indexR>=0) // neighbor
+                                {
+                                        const tbool bAnswer =
+                                                AssignRecur(piTriListIn, pTriInfos, neigh_indexR,
+                                                                        pTriInfos[f].AssignedGroup[i] );
+
+                                        const tbool bOrPre2 = (pTriInfos[neigh_indexR].iFlag&ORIENT_PRESERVING)!=0 ? TTRUE : TFALSE;
+                                        const tbool bDiff = bOrPre!=bOrPre2 ? TTRUE : TFALSE;
+                                        assert(bAnswer || bDiff);
+                                        (void)bAnswer, (void)bDiff;  /* quiet warnings in non debug mode */
+                                }
+
+                                // update offset
+                                iOffset += pTriInfos[f].AssignedGroup[i]->iNrFaces;
+                                // since the groups are disjoint a triangle can never
+                                // belong to more than 3 groups. Subsequently something
+                                // is completely screwed if this assertion ever hits.
+                                assert(iOffset <= iNrMaxGroups);
+                        }
+                }
+        }
+
+        return iNrActiveGroups;
+}
+
+static void AddTriToGroup(SGroup * pGroup, const int iTriIndex)
+{
+        pGroup->pFaceIndices[pGroup->iNrFaces] = iTriIndex;
+        ++pGroup->iNrFaces;
+}
+
+static tbool AssignRecur(const int piTriListIn[], STriInfo psTriInfos[],
+                                 const int iMyTriIndex, SGroup * pGroup)
+{
+        STriInfo * pMyTriInfo = &psTriInfos[iMyTriIndex];
+
+        // track down vertex
+        const int iVertRep = pGroup->iVertexRepresentitive;
+        const int * pVerts = &piTriListIn[3*iMyTriIndex+0];
+        int i=-1;
+        if (pVerts[0]==iVertRep) i=0;
+        else if (pVerts[1]==iVertRep) i=1;
+        else if (pVerts[2]==iVertRep) i=2;
+        assert(i>=0 && i<3);
+
+        // early out
+        if (pMyTriInfo->AssignedGroup[i] == pGroup) return TTRUE;
+        else if (pMyTriInfo->AssignedGroup[i]!=NULL) return TFALSE;
+        if ((pMyTriInfo->iFlag&GROUP_WITH_ANY)!=0)
+        {
+                // first to group with a group-with-anything triangle
+                // determines it's orientation.
+                // This is the only existing order dependency in the code!!
+                if ( pMyTriInfo->AssignedGroup[0] == NULL &&
+                        pMyTriInfo->AssignedGroup[1] == NULL &&
+                        pMyTriInfo->AssignedGroup[2] == NULL )
+                {
+                        pMyTriInfo->iFlag &= (~ORIENT_PRESERVING);
+                        pMyTriInfo->iFlag |= (pGroup->bOrientPreservering ? ORIENT_PRESERVING : 0);
+                }
+        }
+        {
+                const tbool bOrient = (pMyTriInfo->iFlag&ORIENT_PRESERVING)!=0 ? TTRUE : TFALSE;
+                if (bOrient != pGroup->bOrientPreservering) return TFALSE;
+        }
+
+        AddTriToGroup(pGroup, iMyTriIndex);
+        pMyTriInfo->AssignedGroup[i] = pGroup;
+
+        {
+                const int neigh_indexL = pMyTriInfo->FaceNeighbors[i];
+                const int neigh_indexR = pMyTriInfo->FaceNeighbors[i>0?(i-1):2];
+                if (neigh_indexL>=0)
+                        AssignRecur(piTriListIn, psTriInfos, neigh_indexL, pGroup);
+                if (neigh_indexR>=0)
+                        AssignRecur(piTriListIn, psTriInfos, neigh_indexR, pGroup);
+        }
+
+
+
+        return TTRUE;
+}
+
+/////////////////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////////////////
+
+static tbool CompareSubGroups(const SSubGroup * pg1, const SSubGroup * pg2);
+static void QuickSort(int* pSortBuffer, int iLeft, int iRight, unsigned int uSeed);
+static STSpace EvalTspace(int face_indices[], const int iFaces, const int piTriListIn[], const STriInfo pTriInfos[], const SMikkTSpaceContext * pContext, const int iVertexRepresentitive);
+
+static tbool GenerateTSpaces(STSpace psTspace[], const STriInfo pTriInfos[], const SGroup pGroups[],
+                             const int iNrActiveGroups, const int piTriListIn[], const float fThresCos,
+                             const SMikkTSpaceContext * pContext)
+{
+        STSpace * pSubGroupTspace = NULL;
+        SSubGroup * pUniSubGroups = NULL;
+        int * pTmpMembers = NULL;
+        int iMaxNrFaces=0, iUniqueTspaces=0, g=0, i=0;
+        for (g=0; g<iNrActiveGroups; g++)
+                if (iMaxNrFaces < pGroups[g].iNrFaces)
+                        iMaxNrFaces = pGroups[g].iNrFaces;
+
+        if (iMaxNrFaces == 0) return TTRUE;
+
+        // make initial allocations
+        pSubGroupTspace = (STSpace *) malloc(sizeof(STSpace)*iMaxNrFaces);
+        pUniSubGroups = (SSubGroup *) malloc(sizeof(SSubGroup)*iMaxNrFaces);
+        pTmpMembers = (int *) malloc(sizeof(int)*iMaxNrFaces);
+        if (pSubGroupTspace==NULL || pUniSubGroups==NULL || pTmpMembers==NULL)
+        {
+                if (pSubGroupTspace!=NULL) free(pSubGroupTspace);
+                if (pUniSubGroups!=NULL) free(pUniSubGroups);
+                if (pTmpMembers!=NULL) free(pTmpMembers);
+                return TFALSE;
+        }
+
+
+        iUniqueTspaces = 0;
+        for (g=0; g<iNrActiveGroups; g++)
+        {
+                const SGroup * pGroup = &pGroups[g];
+                int iUniqueSubGroups = 0, s=0;
+
+                for (i=0; i<pGroup->iNrFaces; i++)      // triangles
+                {
+                        const int f = pGroup->pFaceIndices[i];  // triangle number
+                        int index=-1, iVertIndex=-1, iOF_1=-1, iMembers=0, j=0, l=0;
+                        SSubGroup tmp_group;
+                        tbool bFound;
+                        SVec3 n, vOs, vOt;
+                        if (pTriInfos[f].AssignedGroup[0]==pGroup) index=0;
+                        else if (pTriInfos[f].AssignedGroup[1]==pGroup) index=1;
+                        else if (pTriInfos[f].AssignedGroup[2]==pGroup) index=2;
+                        assert(index>=0 && index<3);
+
+                        iVertIndex = piTriListIn[f*3+index];
+                        assert(iVertIndex==pGroup->iVertexRepresentitive);
+
+                        // is normalized already
+                        n = GetNormal(pContext, iVertIndex);
+                        
+                        // project
+                        vOs = vsub(pTriInfos[f].vOs, vscale(vdot(n,pTriInfos[f].vOs), n));
+                        vOt = vsub(pTriInfos[f].vOt, vscale(vdot(n,pTriInfos[f].vOt), n));
+                        if ( VNotZero(vOs) ) vOs = Normalize(vOs);
+                        if ( VNotZero(vOt) ) vOt = Normalize(vOt);
+
+                        // original face number
+                        iOF_1 = pTriInfos[f].iOrgFaceNumber;
+                        
+                        iMembers = 0;
+                        for (j=0; j<pGroup->iNrFaces; j++)
+                        {
+                                const int t = pGroup->pFaceIndices[j];  // triangle number
+                                const int iOF_2 = pTriInfos[t].iOrgFaceNumber;
+
+                                // project
+                                SVec3 vOs2 = vsub(pTriInfos[t].vOs, vscale(vdot(n,pTriInfos[t].vOs), n));
+                                SVec3 vOt2 = vsub(pTriInfos[t].vOt, vscale(vdot(n,pTriInfos[t].vOt), n));
+                                if ( VNotZero(vOs2) ) vOs2 = Normalize(vOs2);
+                                if ( VNotZero(vOt2) ) vOt2 = Normalize(vOt2);
+
+                                {
+                                        const tbool bAny = ( (pTriInfos[f].iFlag | pTriInfos[t].iFlag) & GROUP_WITH_ANY )!=0 ? TTRUE : TFALSE;
+                                        // make sure triangles which belong to the same quad are joined.
+                                        const tbool bSameOrgFace = iOF_1==iOF_2 ? TTRUE : TFALSE;
+
+                                        const float fCosS = vdot(vOs,vOs2);
+                                        const float fCosT = vdot(vOt,vOt2);
+
+                                        assert(f!=t || bSameOrgFace);   // sanity check
+                                        if (bAny || bSameOrgFace || (fCosS>fThresCos && fCosT>fThresCos))
+                                                pTmpMembers[iMembers++] = t;
+                                }
+                        }
+
+                        // sort pTmpMembers
+                        tmp_group.iNrFaces = iMembers;
+                        tmp_group.pTriMembers = pTmpMembers;
+                        if (iMembers>1)
+                        {
+                                unsigned int uSeed = INTERNAL_RND_SORT_SEED;    // could replace with a random seed?
+                                QuickSort(pTmpMembers, 0, iMembers-1, uSeed);
+                        }
+
+                        // look for an existing match
+                        bFound = TFALSE;
+                        l=0;
+                        while (l<iUniqueSubGroups && !bFound)
+                        {
+                                bFound = CompareSubGroups(&tmp_group, &pUniSubGroups[l]);
+                                if (!bFound) ++l;
+                        }
+                        
+                        // assign tangent space index
+                        assert(bFound || l==iUniqueSubGroups);
+                        //piTempTangIndices[f*3+index] = iUniqueTspaces+l;
+
+                        // if no match was found we allocate a new subgroup
+                        if (!bFound)
+                        {
+                                // insert new subgroup
+                                int * pIndices = (int *) malloc(sizeof(int)*iMembers);
+                                if (pIndices==NULL)
+                                {
+                                        // clean up and return false
+                                        int s=0;
+                                        for (s=0; s<iUniqueSubGroups; s++)
+                                                free(pUniSubGroups[s].pTriMembers);
+                                        free(pUniSubGroups);
+                                        free(pTmpMembers);
+                                        free(pSubGroupTspace);
+                                        return TFALSE;
+                                }
+                                pUniSubGroups[iUniqueSubGroups].iNrFaces = iMembers;
+                                pUniSubGroups[iUniqueSubGroups].pTriMembers = pIndices;
+                                memcpy(pIndices, tmp_group.pTriMembers, iMembers*sizeof(int));
+                                pSubGroupTspace[iUniqueSubGroups] =
+                                        EvalTspace(tmp_group.pTriMembers, iMembers, piTriListIn, pTriInfos, pContext, pGroup->iVertexRepresentitive);
+                                ++iUniqueSubGroups;
+                        }
+
+                        // output tspace
+                        {
+                                const int iOffs = pTriInfos[f].iTSpacesOffs;
+                                const int iVert = pTriInfos[f].vert_num[index];
+                                STSpace * pTS_out = &psTspace[iOffs+iVert];
+                                assert(pTS_out->iCounter<2);
+                                assert(((pTriInfos[f].iFlag&ORIENT_PRESERVING)!=0) == pGroup->bOrientPreservering);
+                                if (pTS_out->iCounter==1)
+                                {
+                                        *pTS_out = AvgTSpace(pTS_out, &pSubGroupTspace[l]);
+                                        pTS_out->iCounter = 2;  // update counter
+                                        pTS_out->bOrient = pGroup->bOrientPreservering;
+                                }
+                                else
+                                {
+                                        assert(pTS_out->iCounter==0);
+                                        *pTS_out = pSubGroupTspace[l];
+                                        pTS_out->iCounter = 1;  // update counter
+                                        pTS_out->bOrient = pGroup->bOrientPreservering;
+                                }
+                        }
+                }
+
+                // clean up and offset iUniqueTspaces
+                for (s=0; s<iUniqueSubGroups; s++)
+                        free(pUniSubGroups[s].pTriMembers);
+                iUniqueTspaces += iUniqueSubGroups;
+        }
+
+        // clean up
+        free(pUniSubGroups);
+        free(pTmpMembers);
+        free(pSubGroupTspace);
+
+        return TTRUE;
+}
+
+static STSpace EvalTspace(int face_indices[], const int iFaces, const int piTriListIn[], const STriInfo pTriInfos[],
+                          const SMikkTSpaceContext * pContext, const int iVertexRepresentitive)
+{
+        STSpace res;
+        float fAngleSum = 0;
+        int face=0;
+        res.vOs.x=0.0f; res.vOs.y=0.0f; res.vOs.z=0.0f;
+        res.vOt.x=0.0f; res.vOt.y=0.0f; res.vOt.z=0.0f;
+        res.fMagS = 0; res.fMagT = 0;
+
+        for (face=0; face<iFaces; face++)
+        {
+                const int f = face_indices[face];
+
+                // only valid triangles get to add their contribution
+                if ( (pTriInfos[f].iFlag&GROUP_WITH_ANY)==0 )
+                {
+                        SVec3 n, vOs, vOt, p0, p1, p2, v1, v2;
+                        float fCos, fAngle, fMagS, fMagT;
+                        int i=-1, index=-1, i0=-1, i1=-1, i2=-1;
+                        if (piTriListIn[3*f+0]==iVertexRepresentitive) i=0;
+                        else if (piTriListIn[3*f+1]==iVertexRepresentitive) i=1;
+                        else if (piTriListIn[3*f+2]==iVertexRepresentitive) i=2;
+                        assert(i>=0 && i<3);
+
+                        // project
+                        index = piTriListIn[3*f+i];
+                        n = GetNormal(pContext, index);
+                        vOs = vsub(pTriInfos[f].vOs, vscale(vdot(n,pTriInfos[f].vOs), n));
+                        vOt = vsub(pTriInfos[f].vOt, vscale(vdot(n,pTriInfos[f].vOt), n));
+                        if ( VNotZero(vOs) ) vOs = Normalize(vOs);
+                        if ( VNotZero(vOt) ) vOt = Normalize(vOt);
+
+                        i2 = piTriListIn[3*f + (i<2?(i+1):0)];
+                        i1 = piTriListIn[3*f + i];
+                        i0 = piTriListIn[3*f + (i>0?(i-1):2)];
+
+                        p0 = GetPosition(pContext, i0);
+                        p1 = GetPosition(pContext, i1);
+                        p2 = GetPosition(pContext, i2);
+                        v1 = vsub(p0,p1);
+                        v2 = vsub(p2,p1);
+
+                        // project
+                        v1 = vsub(v1, vscale(vdot(n,v1),n)); if ( VNotZero(v1) ) v1 = Normalize(v1);
+                        v2 = vsub(v2, vscale(vdot(n,v2),n)); if ( VNotZero(v2) ) v2 = Normalize(v2);
+
+                        // weight contribution by the angle
+                        // between the two edge vectors
+                        fCos = vdot(v1,v2); fCos=fCos>1?1:(fCos<(-1) ? (-1) : fCos);
+                        fAngle = (float) acos(fCos);
+                        fMagS = pTriInfos[f].fMagS;
+                        fMagT = pTriInfos[f].fMagT;
+
+                        res.vOs=vadd(res.vOs, vscale(fAngle,vOs));
+                        res.vOt=vadd(res.vOt,vscale(fAngle,vOt));
+                        res.fMagS+=(fAngle*fMagS);
+                        res.fMagT+=(fAngle*fMagT);
+                        fAngleSum += fAngle;
+                }
+        }
+
+        // normalize
+        if ( VNotZero(res.vOs) ) res.vOs = Normalize(res.vOs);
+        if ( VNotZero(res.vOt) ) res.vOt = Normalize(res.vOt);
+        if (fAngleSum>0)
+        {
+                res.fMagS /= fAngleSum;
+                res.fMagT /= fAngleSum;
+        }
+
+        return res;
+}
+
+static tbool CompareSubGroups(const SSubGroup * pg1, const SSubGroup * pg2)
+{
+        tbool bStillSame=TTRUE;
+        int i=0;
+        if (pg1->iNrFaces!=pg2->iNrFaces) return TFALSE;
+        while (i<pg1->iNrFaces && bStillSame)
+        {
+                bStillSame = pg1->pTriMembers[i]==pg2->pTriMembers[i] ? TTRUE : TFALSE;
+                if (bStillSame) ++i;
+        }
+        return bStillSame;
+}
+
+static void QuickSort(int* pSortBuffer, int iLeft, int iRight, unsigned int uSeed)
+{
+        int iL, iR, n, index, iMid, iTmp;
+
+        // Random
+        unsigned int t=uSeed&31;
+        t=(uSeed<<t)|(uSeed>>(32-t));
+        uSeed=uSeed+t+3;
+        // Random end
+
+        iL=iLeft; iR=iRight;
+        n = (iR-iL)+1;
+        assert(n>=0);
+        index = (int) (uSeed%n);
+
+        iMid=pSortBuffer[index + iL];
+
+
+        do
+        {
+                while (pSortBuffer[iL] < iMid)
+                        ++iL;
+                while (pSortBuffer[iR] > iMid)
+                        --iR;
+
+                if (iL <= iR)
+                {
+                        iTmp = pSortBuffer[iL];
+                        pSortBuffer[iL] = pSortBuffer[iR];
+                        pSortBuffer[iR] = iTmp;
+                        ++iL; --iR;
+                }
+        }
+        while (iL <= iR);
+
+        if (iLeft < iR)
+                QuickSort(pSortBuffer, iLeft, iR, uSeed);
+        if (iL < iRight)
+                QuickSort(pSortBuffer, iL, iRight, uSeed);
+}
+
+/////////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////////
+
+static void QuickSortEdges(SEdge * pSortBuffer, int iLeft, int iRight, const int channel, unsigned int uSeed);
+static void GetEdge(int * i0_out, int * i1_out, int * edgenum_out, const int indices[], const int i0_in, const int i1_in);
+
+static void BuildNeighborsFast(STriInfo pTriInfos[], SEdge * pEdges, const int piTriListIn[], const int iNrTrianglesIn)
+{
+        // build array of edges
+        unsigned int uSeed = INTERNAL_RND_SORT_SEED;                            // could replace with a random seed?
+        int iEntries=0, iCurStartIndex=-1, f=0, i=0;
+        for (f=0; f<iNrTrianglesIn; f++)
+                for (i=0; i<3; i++)
+                {
+                        const int i0 = piTriListIn[f*3+i];
+                        const int i1 = piTriListIn[f*3+(i<2?(i+1):0)];
+                        pEdges[f*3+i].i0 = i0 < i1 ? i0 : i1;                   // put minimum index in i0
+                        pEdges[f*3+i].i1 = !(i0 < i1) ? i0 : i1;                // put maximum index in i1
+                        pEdges[f*3+i].f = f;                                                    // record face number
+                }
+
+        // sort over all edges by i0, this is the pricy one.
+        QuickSortEdges(pEdges, 0, iNrTrianglesIn*3-1, 0, uSeed);        // sort channel 0 which is i0
+
+        // sub sort over i1, should be fast.
+        // could replace this with a 64 bit int sort over (i0,i1)
+        // with i0 as msb in the quicksort call above.
+        iEntries = iNrTrianglesIn*3;
+        iCurStartIndex = 0;
+        for (i=1; i<iEntries; i++)
+        {
+                if (pEdges[iCurStartIndex].i0 != pEdges[i].i0)
+                {
+                        const int iL = iCurStartIndex;
+                        const int iR = i-1;
+                        //const int iElems = i-iL;
+                        iCurStartIndex = i;
+                        QuickSortEdges(pEdges, iL, iR, 1, uSeed);       // sort channel 1 which is i1
+                }
+        }
+
+        // sub sort over f, which should be fast.
+        // this step is to remain compliant with BuildNeighborsSlow() when
+        // more than 2 triangles use the same edge (such as a butterfly topology).
+        iCurStartIndex = 0;
+        for (i=1; i<iEntries; i++)
+        {
+                if (pEdges[iCurStartIndex].i0 != pEdges[i].i0 || pEdges[iCurStartIndex].i1 != pEdges[i].i1)
+                {
+                        const int iL = iCurStartIndex;
+                        const int iR = i-1;
+                        //const int iElems = i-iL;
+                        iCurStartIndex = i;
+                        QuickSortEdges(pEdges, iL, iR, 2, uSeed);       // sort channel 2 which is f
+                }
+        }
+
+        // pair up, adjacent triangles
+        for (i=0; i<iEntries; i++)
+        {
+                const int i0=pEdges[i].i0;
+                const int i1=pEdges[i].i1;
+                const int f = pEdges[i].f;
+                tbool bUnassigned_A;
+
+                int i0_A, i1_A;
+                int edgenum_A, edgenum_B=0;     // 0,1 or 2
+                GetEdge(&i0_A, &i1_A, &edgenum_A, &piTriListIn[f*3], i0, i1);   // resolve index ordering and edge_num
+                bUnassigned_A = pTriInfos[f].FaceNeighbors[edgenum_A] == -1 ? TTRUE : TFALSE;
+
+                if (bUnassigned_A)
+                {
+                        // get true index ordering
+                        int j=i+1, t;
+                        tbool bNotFound = TTRUE;
+                        while (j<iEntries && i0==pEdges[j].i0 && i1==pEdges[j].i1 && bNotFound)
+                        {
+                                tbool bUnassigned_B;
+                                int i0_B, i1_B;
+                                t = pEdges[j].f;
+                                // flip i0_B and i1_B
+                                GetEdge(&i1_B, &i0_B, &edgenum_B, &piTriListIn[t*3], pEdges[j].i0, pEdges[j].i1);       // resolve index ordering and edge_num
+                                //assert(!(i0_A==i1_B && i1_A==i0_B));
+                                bUnassigned_B =  pTriInfos[t].FaceNeighbors[edgenum_B]==-1 ? TTRUE : TFALSE;
+                                if (i0_A==i0_B && i1_A==i1_B && bUnassigned_B)
+                                        bNotFound = TFALSE;
+                                else
+                                        ++j;
+                        }
+
+                        if (!bNotFound)
+                        {
+                                int t = pEdges[j].f;
+                                pTriInfos[f].FaceNeighbors[edgenum_A] = t;
+                                //assert(pTriInfos[t].FaceNeighbors[edgenum_B]==-1);
+                                pTriInfos[t].FaceNeighbors[edgenum_B] = f;
+                        }
+                }
+        }
+}
+
+static void BuildNeighborsSlow(STriInfo pTriInfos[], const int piTriListIn[], const int iNrTrianglesIn)
+{
+        int f=0, i=0;
+        for (f=0; f<iNrTrianglesIn; f++)
+        {
+                for (i=0; i<3; i++)
+                {
+                        // if unassigned
+                        if (pTriInfos[f].FaceNeighbors[i] == -1)
+                        {
+                                const int i0_A = piTriListIn[f*3+i];
+                                const int i1_A = piTriListIn[f*3+(i<2?(i+1):0)];
+
+                                // search for a neighbor
+                                tbool bFound = TFALSE;
+                                int t=0, j=0;
+                                while (!bFound && t<iNrTrianglesIn)
+                                {
+                                        if (t!=f)
+                                        {
+                                                j=0;
+                                                while (!bFound && j<3)
+                                                {
+                                                        // in rev order
+                                                        const int i1_B = piTriListIn[t*3+j];
+                                                        const int i0_B = piTriListIn[t*3+(j<2?(j+1):0)];
+                                                        //assert(!(i0_A==i1_B && i1_A==i0_B));
+                                                        if (i0_A==i0_B && i1_A==i1_B)
+                                                                bFound = TTRUE;
+                                                        else
+                                                                ++j;
+                                                }
+                                        }
+                                        
+                                        if (!bFound) ++t;
+                                }
+
+                                // assign neighbors
+                                if (bFound)
+                                {
+                                        pTriInfos[f].FaceNeighbors[i] = t;
+                                        //assert(pTriInfos[t].FaceNeighbors[j]==-1);
+                                        pTriInfos[t].FaceNeighbors[j] = f;
+                                }
+                        }
+                }
+        }
+}
+
+static void QuickSortEdges(SEdge * pSortBuffer, int iLeft, int iRight, const int channel, unsigned int uSeed)
+{
+        unsigned int t;
+        int iL, iR, n, index, iMid;
+
+        // early out
+        SEdge sTmp;
+        const int iElems = iRight-iLeft+1;
+        if (iElems<2) return;
+        else if (iElems==2)
+        {
+                if (pSortBuffer[iLeft].array[channel] > pSortBuffer[iRight].array[channel])
+                {
+                        sTmp = pSortBuffer[iLeft];
+                        pSortBuffer[iLeft] = pSortBuffer[iRight];
+                        pSortBuffer[iRight] = sTmp;
+                }
+                return;
+        }
+
+        // Random
+        t=uSeed&31;
+        t=(uSeed<<t)|(uSeed>>(32-t));
+        uSeed=uSeed+t+3;
+        // Random end
+
+        iL = iLeft;
+        iR = iRight;
+        n = (iR-iL)+1;
+        assert(n>=0);
+        index = (int) (uSeed%n);
+
+        iMid=pSortBuffer[index + iL].array[channel];
+
+        do
+        {
+                while (pSortBuffer[iL].array[channel] < iMid)
+                        ++iL;
+                while (pSortBuffer[iR].array[channel] > iMid)
+                        --iR;
+
+                if (iL <= iR)
+                {
+                        sTmp = pSortBuffer[iL];
+                        pSortBuffer[iL] = pSortBuffer[iR];
+                        pSortBuffer[iR] = sTmp;
+                        ++iL; --iR;
+                }
+        }
+        while (iL <= iR);
+
+        if (iLeft < iR)
+                QuickSortEdges(pSortBuffer, iLeft, iR, channel, uSeed);
+        if (iL < iRight)
+                QuickSortEdges(pSortBuffer, iL, iRight, channel, uSeed);
+}
+
+// resolve ordering and edge number
+static void GetEdge(int * i0_out, int * i1_out, int * edgenum_out, const int indices[], const int i0_in, const int i1_in)
+{
+        *edgenum_out = -1;
+        
+        // test if first index is on the edge
+        if (indices[0]==i0_in || indices[0]==i1_in)
+        {
+                // test if second index is on the edge
+                if (indices[1]==i0_in || indices[1]==i1_in)
+                {
+                        edgenum_out[0]=0;       // first edge
+                        i0_out[0]=indices[0];
+                        i1_out[0]=indices[1];
+                }
+                else
+                {
+                        edgenum_out[0]=2;       // third edge
+                        i0_out[0]=indices[2];
+                        i1_out[0]=indices[0];
+                }
+        }
+        else
+        {
+                // only second and third index is on the edge
+                edgenum_out[0]=1;       // second edge
+                i0_out[0]=indices[1];
+                i1_out[0]=indices[2];
+        }
+}
+
+
+/////////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////// Degenerate triangles ////////////////////////////////////
+
+static void DegenPrologue(STriInfo pTriInfos[], int piTriList_out[], const int iNrTrianglesIn, const int iTotTris)
+{
+        int iNextGoodTriangleSearchIndex=-1;
+        tbool bStillFindingGoodOnes;
+
+        // locate quads with only one good triangle
+        int t=0;
+        while (t<(iTotTris-1))
+        {
+                const int iFO_a = pTriInfos[t].iOrgFaceNumber;
+                const int iFO_b = pTriInfos[t+1].iOrgFaceNumber;
+                if (iFO_a==iFO_b)       // this is a quad
+                {
+                        const tbool bIsDeg_a = (pTriInfos[t].iFlag&MARK_DEGENERATE)!=0 ? TTRUE : TFALSE;
+                        const tbool bIsDeg_b = (pTriInfos[t+1].iFlag&MARK_DEGENERATE)!=0 ? TTRUE : TFALSE;
+                        if ((bIsDeg_a^bIsDeg_b)!=0)
+                        {
+                                pTriInfos[t].iFlag |= QUAD_ONE_DEGEN_TRI;
+                                pTriInfos[t+1].iFlag |= QUAD_ONE_DEGEN_TRI;
+                        }
+                        t += 2;
+                }
+                else
+                        ++t;
+        }
+
+        // reorder list so all degen triangles are moved to the back
+        // without reordering the good triangles
+        iNextGoodTriangleSearchIndex = 1;
+        t=0;
+        bStillFindingGoodOnes = TTRUE;
+        while (t<iNrTrianglesIn && bStillFindingGoodOnes)
+        {
+                const tbool bIsGood = (pTriInfos[t].iFlag&MARK_DEGENERATE)==0 ? TTRUE : TFALSE;
+                if (bIsGood)
+                {
+                        if (iNextGoodTriangleSearchIndex < (t+2))
+                                iNextGoodTriangleSearchIndex = t+2;
+                }
+                else
+                {
+                        int t0, t1;
+                        // search for the first good triangle.
+                        tbool bJustADegenerate = TTRUE;
+                        while (bJustADegenerate && iNextGoodTriangleSearchIndex<iTotTris)
+                        {
+                                const tbool bIsGood = (pTriInfos[iNextGoodTriangleSearchIndex].iFlag&MARK_DEGENERATE)==0 ? TTRUE : TFALSE;
+                                if (bIsGood) bJustADegenerate=TFALSE;
+                                else ++iNextGoodTriangleSearchIndex;
+                        }
+
+                        t0 = t;
+                        t1 = iNextGoodTriangleSearchIndex;
+                        ++iNextGoodTriangleSearchIndex;
+                        assert(iNextGoodTriangleSearchIndex > (t+1));
+
+                        // swap triangle t0 and t1
+                        if (!bJustADegenerate)
+                        {
+                                int i=0;
+                                for (i=0; i<3; i++)
+                                {
+                                        const int index = piTriList_out[t0*3+i];
+                                        piTriList_out[t0*3+i] = piTriList_out[t1*3+i];
+                                        piTriList_out[t1*3+i] = index;
+                                }
+                                {
+                                        const STriInfo tri_info = pTriInfos[t0];
+                                        pTriInfos[t0] = pTriInfos[t1];
+                                        pTriInfos[t1] = tri_info;
+                                }
+                        }
+                        else
+                                bStillFindingGoodOnes = TFALSE; // this is not supposed to happen
+                }
+
+                if (bStillFindingGoodOnes) ++t;
+        }
+
+        assert(bStillFindingGoodOnes);  // code will still work.
+        assert(iNrTrianglesIn == t);
+}
+
+static void DegenEpilogue(STSpace psTspace[], STriInfo pTriInfos[], int piTriListIn[], const SMikkTSpaceContext * pContext, const int iNrTrianglesIn, const int iTotTris)
+{
+        int t=0, i=0;
+        // deal with degenerate triangles
+        // punishment for degenerate triangles is O(N^2)
+        for (t=iNrTrianglesIn; t<iTotTris; t++)
+        {
+                // degenerate triangles on a quad with one good triangle are skipped
+                // here but processed in the next loop
+                const tbool bSkip = (pTriInfos[t].iFlag&QUAD_ONE_DEGEN_TRI)!=0 ? TTRUE : TFALSE;
+
+                if (!bSkip)
+                {
+                        for (i=0; i<3; i++)
+                        {
+                                const int index1 = piTriListIn[t*3+i];
+                                // search through the good triangles
+                                tbool bNotFound = TTRUE;
+                                int j=0;
+                                while (bNotFound && j<(3*iNrTrianglesIn))
+                                {
+                                        const int index2 = piTriListIn[j];
+                                        if (index1==index2) bNotFound=TFALSE;
+                                        else ++j;
+                                }
+
+                                if (!bNotFound)
+                                {
+                                        const int iTri = j/3;
+                                        const int iVert = j%3;
+                                        const int iSrcVert=pTriInfos[iTri].vert_num[iVert];
+                                        const int iSrcOffs=pTriInfos[iTri].iTSpacesOffs;
+                                        const int iDstVert=pTriInfos[t].vert_num[i];
+                                        const int iDstOffs=pTriInfos[t].iTSpacesOffs;
+                                        
+                                        // copy tspace
+                                        psTspace[iDstOffs+iDstVert] = psTspace[iSrcOffs+iSrcVert];
+                                }
+                        }
+                }
+        }
+
+        // deal with degenerate quads with one good triangle
+        for (t=0; t<iNrTrianglesIn; t++)
+        {
+                // this triangle belongs to a quad where the
+                // other triangle is degenerate
+                if ( (pTriInfos[t].iFlag&QUAD_ONE_DEGEN_TRI)!=0 )
+                {
+                        SVec3 vDstP;
+                        int iOrgF=-1, i=0;
+                        tbool bNotFound;
+                        unsigned char * pV = pTriInfos[t].vert_num;
+                        int iFlag = (1<<pV[0]) | (1<<pV[1]) | (1<<pV[2]);
+                        int iMissingIndex = 0;
+                        if ((iFlag&2)==0) iMissingIndex=1;
+                        else if ((iFlag&4)==0) iMissingIndex=2;
+                        else if ((iFlag&8)==0) iMissingIndex=3;
+
+                        iOrgF = pTriInfos[t].iOrgFaceNumber;
+                        vDstP = GetPosition(pContext, MakeIndex(iOrgF, iMissingIndex));
+                        bNotFound = TTRUE;
+                        i=0;
+                        while (bNotFound && i<3)
+                        {
+                                const int iVert = pV[i];
+                                const SVec3 vSrcP = GetPosition(pContext, MakeIndex(iOrgF, iVert));
+                                if (veq(vSrcP, vDstP)==TTRUE)
+                                {
+                                        const int iOffs = pTriInfos[t].iTSpacesOffs;
+                                        psTspace[iOffs+iMissingIndex] = psTspace[iOffs+iVert];
+                                        bNotFound=TFALSE;
+                                }
+                                else
+                                        ++i;
+                        }
+                        assert(!bNotFound);
+                }
+        }
+}
diff --git a/gfx/contrib/cgltf-tangents/MikkTSpace/mikktspace.h b/gfx/contrib/cgltf-tangents/MikkTSpace/mikktspace.h
new file mode 100644
index 0000000..52c44a7
--- /dev/null
+++ b/gfx/contrib/cgltf-tangents/MikkTSpace/mikktspace.h
@@ -0,0 +1,145 @@
+/** \file mikktspace/mikktspace.h
+ *  \ingroup mikktspace
+ */
+/**
+ *  Copyright (C) 2011 by Morten S. Mikkelsen
+ *
+ *  This software is provided 'as-is', without any express or implied
+ *  warranty.  In no event will the authors be held liable for any damages
+ *  arising from the use of this software.
+ *
+ *  Permission is granted to anyone to use this software for any purpose,
+ *  including commercial applications, and to alter it and redistribute it
+ *  freely, subject to the following restrictions:
+ *
+ *  1. The origin of this software must not be misrepresented; you must not
+ *     claim that you wrote the original software. If you use this software
+ *     in a product, an acknowledgment in the product documentation would be
+ *     appreciated but is not required.
+ *  2. Altered source versions must be plainly marked as such, and must not be
+ *     misrepresented as being the original software.
+ *  3. This notice may not be removed or altered from any source distribution.
+ */
+
+#ifndef __MIKKTSPACE_H__
+#define __MIKKTSPACE_H__
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Author: Morten S. Mikkelsen
+ * Version: 1.0
+ *
+ * The files mikktspace.h and mikktspace.c are designed to be
+ * stand-alone files and it is important that they are kept this way.
+ * Not having dependencies on structures/classes/libraries specific
+ * to the program, in which they are used, allows them to be copied
+ * and used as is into any tool, program or plugin.
+ * The code is designed to consistently generate the same
+ * tangent spaces, for a given mesh, in any tool in which it is used.
+ * This is done by performing an internal welding step and subsequently an order-independent evaluation
+ * of tangent space for meshes consisting of triangles and quads.
+ * This means faces can be received in any order and the same is true for
+ * the order of vertices of each face. The generated result will not be affected
+ * by such reordering. Additionally, whether degenerate (vertices or texture coordinates)
+ * primitives are present or not will not affect the generated results either.
+ * Once tangent space calculation is done the vertices of degenerate primitives will simply
+ * inherit tangent space from neighboring non degenerate primitives.
+ * The analysis behind this implementation can be found in my master's thesis
+ * which is available for download --> http://image.diku.dk/projects/media/morten.mikkelsen.08.pdf
+ * Note that though the tangent spaces at the vertices are generated in an order-independent way,
+ * by this implementation, the interpolated tangent space is still affected by which diagonal is
+ * chosen to split each quad. A sensible solution is to have your tools pipeline always
+ * split quads by the shortest diagonal. This choice is order-independent and works with mirroring.
+ * If these have the same length then compare the diagonals defined by the texture coordinates.
+ * XNormal which is a tool for baking normal maps allows you to write your own tangent space plugin
+ * and also quad triangulator plugin.
+ */
+
+
+typedef int tbool;
+typedef struct SMikkTSpaceContext SMikkTSpaceContext;
+
+typedef struct {
+        // Returns the number of faces (triangles/quads) on the mesh to be processed.
+        int (*m_getNumFaces)(const SMikkTSpaceContext * pContext);
+
+        // Returns the number of vertices on face number iFace
+        // iFace is a number in the range {0, 1, ..., getNumFaces()-1}
+        int (*m_getNumVerticesOfFace)(const SMikkTSpaceContext * pContext, const int iFace);
+
+        // returns the position/normal/texcoord of the referenced face of vertex number iVert.
+        // iVert is in the range {0,1,2} for triangles and {0,1,2,3} for quads.
+        void (*m_getPosition)(const SMikkTSpaceContext * pContext, float fvPosOut[], const int iFace, const int iVert);
+        void (*m_getNormal)(const SMikkTSpaceContext * pContext, float fvNormOut[], const int iFace, const int iVert);
+        void (*m_getTexCoord)(const SMikkTSpaceContext * pContext, float fvTexcOut[], const int iFace, const int iVert);
+
+        // either (or both) of the two setTSpace callbacks can be set.
+        // The call-back m_setTSpaceBasic() is sufficient for basic normal mapping.
+
+        // This function is used to return the tangent and fSign to the application.
+        // fvTangent is a unit length vector.
+        // For normal maps it is sufficient to use the following simplified version of the bitangent which is generated at pixel/vertex level.
+        // bitangent = fSign * cross(vN, tangent);
+        // Note that the results are returned unindexed. It is possible to generate a new index list
+        // But averaging/overwriting tangent spaces by using an already existing index list WILL produce INCRORRECT results.
+        // DO NOT! use an already existing index list.
+        void (*m_setTSpaceBasic)(const SMikkTSpaceContext * pContext, const float fvTangent[], const float fSign, const int iFace, const int iVert);
+
+        // This function is used to return tangent space results to the application.
+        // fvTangent and fvBiTangent are unit length vectors and fMagS and fMagT are their
+        // true magnitudes which can be used for relief mapping effects.
+        // fvBiTangent is the "real" bitangent and thus may not be perpendicular to fvTangent.
+        // However, both are perpendicular to the vertex normal.
+        // For normal maps it is sufficient to use the following simplified version of the bitangent which is generated at pixel/vertex level.
+        // fSign = bIsOrientationPreserving ? 1.0f : (-1.0f);
+        // bitangent = fSign * cross(vN, tangent);
+        // Note that the results are returned unindexed. It is possible to generate a new index list
+        // But averaging/overwriting tangent spaces by using an already existing index list WILL produce INCRORRECT results.
+        // DO NOT! use an already existing index list.
+        void (*m_setTSpace)(const SMikkTSpaceContext * pContext, const float fvTangent[], const float fvBiTangent[], const float fMagS, const float fMagT,
+                                                const tbool bIsOrientationPreserving, const int iFace, const int iVert);
+} SMikkTSpaceInterface;
+
+struct SMikkTSpaceContext
+{
+        SMikkTSpaceInterface * m_pInterface;    // initialized with callback functions
+        void * m_pUserData;                                             // pointer to client side mesh data etc. (passed as the first parameter with every interface call)
+};
+
+// these are both thread safe!
+tbool genTangSpaceDefault(const SMikkTSpaceContext * pContext); // Default (recommended) fAngularThreshold is 180 degrees (which means threshold disabled)
+tbool genTangSpace(const SMikkTSpaceContext * pContext, const float fAngularThreshold);
+
+
+// To avoid visual errors (distortions/unwanted hard edges in lighting), when using sampled normal maps, the
+// normal map sampler must use the exact inverse of the pixel shader transformation.
+// The most efficient transformation we can possibly do in the pixel shader is
+// achieved by using, directly, the "unnormalized" interpolated tangent, bitangent and vertex normal: vT, vB and vN.
+// pixel shader (fast transform out)
+// vNout = normalize( vNt.x * vT + vNt.y * vB + vNt.z * vN );
+// where vNt is the tangent space normal. The normal map sampler must likewise use the
+// interpolated and "unnormalized" tangent, bitangent and vertex normal to be compliant with the pixel shader.
+// sampler does (exact inverse of pixel shader):
+// float3 row0 = cross(vB, vN);
+// float3 row1 = cross(vN, vT);
+// float3 row2 = cross(vT, vB);
+// float fSign = dot(vT, row0)<0 ? -1 : 1;
+// vNt = normalize( fSign * float3(dot(vNout,row0), dot(vNout,row1), dot(vNout,row2)) );
+// where vNout is the sampled normal in some chosen 3D space.
+//
+// Should you choose to reconstruct the bitangent in the pixel shader instead
+// of the vertex shader, as explained earlier, then be sure to do this in the normal map sampler also.
+// Finally, beware of quad triangulations. If the normal map sampler doesn't use the same triangulation of
+// quads as your renderer then problems will occur since the interpolated tangent spaces will differ
+// eventhough the vertex level tangent spaces match. This can be solved either by triangulating before
+// sampling/exporting or by using the order-independent choice of diagonal for splitting quads suggested earlier.
+// However, this must be used both by the sampler and your tools/rendering pipeline.
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/gfx/contrib/cgltf-tangents/README.md b/gfx/contrib/cgltf-tangents/README.md
new file mode 100644
index 0000000..2a68b27
--- /dev/null
+++ b/gfx/contrib/cgltf-tangents/README.md
@@ -0,0 +1,42 @@
+# cgltf-tangents
+
+A library to compute missing tangent vectors in glTF models using MikkTSpace.
+
+## Example
+
+```
+// Load the glTF scene and buffers as usual.
+cgltf_result result = cgltf_parse_file(&options, filepath, &data);
+cgltf_load_buffers(&options, data, filepath);
+
+// Compute missing tangents.
+cgltfTangentBuffer* tangent_buffers = 0;
+cgltf_size num_tangent_buffers = 0;
+cgltf_compute_tangents(&options, data, &tangent_buffers, &num_tangent_buffers);
+```
+
+## About
+
+This is a single-header/source library that combines
+[MikkTSpace](https://github.com/mmikk/MikkTSpace) and
+[cgltf](https://github.com/jkuhlmann/cgltf) to compute missing tangent vectors
+for models.
+
+Mesh primitives in glTF may have a normal map but not necessarily tangent
+vectors. An example is the
+[DamagedHelmet](https://github.com/KhronosGroup/glTF-Sample-Models/tree/master/2.0/DamagedHelmet/glTF)
+sample. From the
+[spec](https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html#meshes):
+
+*"When tangents are not specified, client implementations SHOULD calculate
+tangents using default MikkTSpace algorithms with the specified vertex
+positions, normals, and texture coordinates associated with the normal texture."*
+
+cgltf-tangents takes an input glTF scene and scans it for mesh primitives that
+have a normal map but no tangents. cgltf-tangents then invokes MikkTSpace to
+compute tangents for those mesh primitives and outputs an array of tangent
+buffers. The client can then upload these buffers to GPU memory for rendering.
+
+See `test/` for a complete example.
+
+MikkTSpace is packaged here for convenience. cgltf must be obtained separately.
diff --git a/gfx/contrib/cgltf-tangents/cgltf_tangents.c b/gfx/contrib/cgltf-tangents/cgltf_tangents.c
new file mode 100644
index 0000000..80b1e56
--- /dev/null
+++ b/gfx/contrib/cgltf-tangents/cgltf_tangents.c
@@ -0,0 +1,618 @@
+/*
+Copyright 2022 Marc Sunet
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+this list of conditions and the following disclaimer in the documentation and/or
+other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+#include "cgltf_tangents.h"
+#include "cgltf.h"
+
+#include "MikkTSpace/mikktspace.h"
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef CGLTF_TANGENTS_DEBUG
+#include <stdio.h>
+#define DLOG printf
+#else
+#define DLOG(...)
+#endif
+
+#include <stdio.h> // TODO: Remove me.
+
+#define CGLTF_OPTIONS_MALLOC(size)                                             \
+  options->memory.alloc(options->memory.user_data, size)
+
+#define CGLTF_OPTIONS_FREE(ptr)                                                \
+  options->memory.free(options->memory.user_data, ptr)
+
+static void* cgltf_default_alloc(void* user, cgltf_size size) {
+  (void)user;
+  return malloc(size);
+}
+
+static void cgltf_default_free(void* user, void* ptr) {
+  (void)user;
+  free(ptr);
+}
+
+static const cgltf_size NUM_TANGENT_COMPONENTS = 4; // X,Y,Z,fSign
+
+static float normalize_i8(int8_t x) { return (float)x / 128.0; }
+static float normalize_u8(uint8_t x) { return (float)x / 255.0; }
+static float normalize_i16(int16_t x) { return (float)x / 32768.0; }
+static float normalize_u16(uint16_t x) { return (float)x / 65535.0; }
+static float normalize_u32(uint32_t x) { return (float)x / 4294967295.0; }
+
+static cgltf_size num_vertex_attrib_components(cgltf_type type) {
+  switch (type) {
+  case cgltf_type_scalar:
+    return 1;
+  case cgltf_type_vec2:
+    return 2;
+  case cgltf_type_vec3:
+    return 3;
+  case cgltf_type_vec4:
+    return 4;
+  default:
+    assert(false);
+    return 0;
+  }
+}
+
+static cgltf_size cgltf_component_type_size_bytes(cgltf_component_type type) {
+  switch (type) {
+  case cgltf_component_type_r_8:
+    return 1;
+  case cgltf_component_type_r_8u:
+    return 1;
+  case cgltf_component_type_r_16:
+    return 2;
+  case cgltf_component_type_r_16u:
+    return 2;
+  case cgltf_component_type_r_32u:
+    return 4;
+  case cgltf_component_type_r_32f:
+    return 4;
+  default:
+    assert(false);
+    return 0;
+  }
+}
+
+static cgltf_size default_stride(cgltf_type type,
+                                 cgltf_component_type component_type) {
+  return num_vertex_attrib_components(type) *
+         cgltf_component_type_size_bytes(component_type);
+}
+
+// -----------------------------------------------------------------------------
+// MikkTSpace interface
+
+// An array of values for a given vertex attribute or for vertex indices.
+// For positions and normals, glTF mandates floats.
+// Texcoords and indices can be different types and vary in size: 8-bit, 16-bit,
+// or 32-bit.
+// We store void* pointers so that we can do byte pointer arithmetic.
+typedef struct Buffer {
+  const void* start;         // X-coordinate of the first attribute.
+  const void* end;           // One byte past the end of the buffer.
+  cgltf_size stride_bytes;   // Stride in bytes between each value.
+  cgltf_component_type type; // Type of each value in the buffer.
+} Buffer;
+
+// User data for mesh processing.
+// See: https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html#meshes
+// Buffer pointers have the accessor + view offsets baked in so that we do the
+// addition only once.
+typedef struct SMikkUserData {
+  const cgltf_primitive* primitive;
+  // Index buffer may be empty (mesh primitive has no indices).
+  Buffer indices;
+  // Vertex attributes.
+  Buffer positions;
+  Buffer normals;
+  Buffer texcoords;
+  // Output tangents.
+  void* tangents;
+} SMikkUserData;
+
+static cgltf_size get_vertex_index(const SMikkUserData* data, cgltf_size iFace,
+                                   cgltf_size iVert) {
+  const cgltf_primitive* primitive = data->primitive;
+
+  // First compute a vertex index as if the mesh primitive had no indices.
+  cgltf_size vertex_idx = 0;
+  switch (primitive->type) {
+  case cgltf_primitive_type_triangles:
+    vertex_idx = iFace * 3 + iVert;
+    break;
+  case cgltf_primitive_type_triangle_strip:
+    // For triangle strips:
+    // face 0 -> verts 0, 1, 2
+    // face 1 -> verts 1, 3, 2 (1, 2, 3 flipped)
+    // face 2 -> verts 2, 3, 4
+    // face 3 -> verts 3, 5, 4 (3, 4, 5 flipped)
+    // ...
+    // face N=2k   -> verts N, N+1, N+2
+    // face N=2k+1 -> verts N, N+2, N+1
+    if (iFace & 1) {
+      // Flip the winding of odd faces so that the is consistent with the even
+      // ones.
+      // iVert = 0 -> vert 0
+      // iVert = 1 -> vert 2
+      // iVert = 2 -> vert 1
+      vertex_idx = iFace + (2 - iVert);
+    } else {
+      vertex_idx = iFace + iVert;
+    }
+    break;
+  case cgltf_primitive_type_triangle_fan:
+    // For triangle fans:
+    // face 0 -> verts 0, 1, 2
+    // face 1 -> verts 0, 2, 3
+    // face 2 -> verts 0, 3, 4
+    // face 3 -> verts 0, 4, 5
+    // ...
+    // face N -> verts 0, N=1, N=2
+    if (iVert == 0) {
+      vertex_idx = 0;
+    } else {
+      vertex_idx = iFace + iVert;
+    }
+    break;
+  default:
+    assert(false);
+    break;
+  }
+
+  // If the mesh primitive has vertex indices, then vertex_idx is actually the
+  // index of the index. Index the index buffer with vertex_idx to find the
+  // real vertex index.
+  if (primitive->indices != NULL) {
+    const void* p_idx =
+        data->indices.start + vertex_idx * data->indices.stride_bytes;
+    switch (data->indices.type) {
+    case cgltf_component_type_r_8:
+      vertex_idx = *((int8_t*)p_idx);
+      break;
+    case cgltf_component_type_r_8u:
+      vertex_idx = *((uint8_t*)p_idx);
+      break;
+    case cgltf_component_type_r_16:
+      vertex_idx = *((int16_t*)p_idx);
+      break;
+    case cgltf_component_type_r_16u:
+      vertex_idx = *((uint16_t*)p_idx);
+      break;
+    case cgltf_component_type_r_32u:
+      vertex_idx = *((uint32_t*)p_idx);
+      break;
+    default:
+      assert(false);
+      break;
+    }
+  }
+
+  return vertex_idx;
+}
+
+static const void* get_vertex(const Buffer* buffer, cgltf_size index) {
+  // Stride is the offset in bytes between vertex attributes.
+  const void* vertex = buffer->start + buffer->stride_bytes * index;
+  assert(vertex < buffer->end);
+  return vertex;
+}
+
+static const void* get_position(const SMikkUserData* data, cgltf_size index) {
+  return get_vertex(&data->positions, index);
+}
+
+static const void* get_normal(const SMikkUserData* data, cgltf_size index) {
+  return get_vertex(&data->normals, index);
+}
+
+static const void* get_texcoord(const SMikkUserData* data, cgltf_size index) {
+  return get_vertex(&data->texcoords, index);
+}
+
+static float* get_tangent(void* buffer, cgltf_size index) {
+  // Tangents are tightly packed.
+  return (float*)(buffer) + NUM_TANGENT_COMPONENTS * index;
+}
+
+static int SMikk_get_num_faces(const SMikkTSpaceContext* pContext) {
+  SMikkUserData* data = (SMikkUserData*)pContext->m_pUserData;
+  const cgltf_primitive* primitive = data->primitive;
+
+  // Find the number of effective vertices (vertices or indices) in the mesh
+  // primitive.
+  //
+  // https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html#meshes
+  //
+  // "All attribute accessors for a given primitive MUST have the same count.
+  // When indices property is not defined, attribute accessors' count indicates
+  // the number of vertices to render; when indices property is defined, it
+  // indicates the upper (exclusive) bound on the index values in the indices
+  // accessor, i.e., all index values MUST be less than attribute accessors'
+  // count."
+  const cgltf_size num_verts = (primitive->indices != NULL)
+                                   ? primitive->indices->count
+                                   : primitive->attributes_count;
+
+  // Determine the number of faces given the number of vertices.
+  //
+  // We use the fact that glTF only supports triangles for faces.
+  // https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html#meshes
+  switch (primitive->type) {
+  case cgltf_primitive_type_triangles:
+    return (int)num_verts / 3;
+  case cgltf_primitive_type_triangle_strip:
+  case cgltf_primitive_type_triangle_fan:
+    return (int)num_verts - 2;
+  default:
+    return 0;
+  }
+}
+
+int SMikk_get_num_vertices_of_face(const SMikkTSpaceContext* pContext,
+                                   const int iFace) {
+  // Triangles are the only faces supported by glTF.
+  // https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html#meshes
+  return 3;
+}
+
+void SMikk_get_position(const SMikkTSpaceContext* pContext, float fvPosOut[],
+                        const int iFace, const int iVert) {
+  const SMikkUserData* data = (SMikkUserData*)pContext->m_pUserData;
+  const cgltf_primitive* primitive = data->primitive;
+
+  const cgltf_size idx = get_vertex_index(data, iFace, iVert);
+  const float* coord = get_position(data, idx);
+  fvPosOut[0] = *coord++;
+  fvPosOut[1] = *coord++;
+  fvPosOut[2] = *coord;
+  DLOG("Position (face: %d, vert: %d): %f, %f, %f; idx: %lu\n", iFace, iVert,
+       fvPosOut[0], fvPosOut[1], fvPosOut[2], idx);
+}
+
+void SMikk_get_normal(const SMikkTSpaceContext* pContext, float fvNormOut[],
+                      const int iFace, const int iVert) {
+  const SMikkUserData* data = (SMikkUserData*)pContext->m_pUserData;
+  const cgltf_primitive* primitive = data->primitive;
+
+  const cgltf_size idx = get_vertex_index(data, iFace, iVert);
+  const float* coord = get_normal(data, idx);
+  fvNormOut[0] = *coord++;
+  fvNormOut[1] = *coord++;
+  fvNormOut[2] = *coord;
+  DLOG("Normal (face: %d, vert: %d): %f, %f, %f\n", iFace, iVert, fvNormOut[0],
+       fvNormOut[1], fvNormOut[2]);
+}
+
+void SMikk_get_texcoord(const SMikkTSpaceContext* pContext, float fvTexcOut[],
+                        const int iFace, const int iVert) {
+  const SMikkUserData* data = (SMikkUserData*)pContext->m_pUserData;
+  const cgltf_primitive* primitive = data->primitive;
+
+  const cgltf_size idx = get_vertex_index(data, iFace, iVert);
+  const void* coord = get_texcoord(data, idx);
+  switch (data->texcoords.type) {
+  case cgltf_component_type_r_8: {
+    const int8_t* c = coord;
+    fvTexcOut[0] = normalize_i8(*c++);
+    fvTexcOut[1] = normalize_i8(*c);
+    break;
+  }
+  case cgltf_component_type_r_8u: {
+    const uint8_t* c = coord;
+    fvTexcOut[0] = normalize_u8(*c++);
+    fvTexcOut[1] = normalize_u8(*c);
+    break;
+  }
+  case cgltf_component_type_r_16: {
+    const int16_t* c = coord;
+    fvTexcOut[0] = normalize_i16(*c++);
+    fvTexcOut[1] = normalize_i16(*c);
+    break;
+  }
+  case cgltf_component_type_r_16u: {
+    const uint16_t* c = coord;
+    fvTexcOut[0] = normalize_u16(*c++);
+    fvTexcOut[1] = normalize_u16(*c);
+    break;
+  }
+  case cgltf_component_type_r_32u: {
+    const uint32_t* c = coord;
+    fvTexcOut[0] = normalize_u32(*c++);
+    fvTexcOut[1] = normalize_u32(*c);
+    break;
+  }
+  case cgltf_component_type_r_32f: {
+    const float* c = coord;
+    fvTexcOut[0] = *c++;
+    fvTexcOut[1] = *c;
+    break;
+  }
+  default:
+    assert(false);
+    break;
+  }
+  DLOG("Texcoord (face: %d, vert: %d): %f, %f\n", iFace, iVert, fvTexcOut[0],
+       fvTexcOut[1]);
+}
+
+void SMikk_set_TSpace_basic(const SMikkTSpaceContext* pContext,
+                            const float fvTangent[], const float fSign,
+                            const int iFace, const int iVert) {
+  SMikkUserData* data = (SMikkUserData*)pContext->m_pUserData;
+  const cgltf_primitive* primitive = data->primitive;
+
+  const cgltf_size idx = get_vertex_index(data, iFace, iVert);
+  float* coord = get_tangent(data->tangents, idx);
+  *coord++ = fvTangent[0];
+  *coord++ = fvTangent[1];
+  *coord++ = fvTangent[2];
+  *coord = fSign;
+  DLOG("Tangent (face: %d, vert: %d): %f, %f, %f; sign: %f\n", iFace, iVert,
+       fvTangent[0], fvTangent[1], fvTangent[2], fSign);
+}
+
+// -----------------------------------------------------------------------------
+
+static bool has_normal_map(const cgltf_primitive* primitive) {
+  return (primitive->material != NULL) &&
+         (primitive->material->normal_texture.texture != NULL);
+}
+
+static const cgltf_attribute* find_attribute(const cgltf_primitive* primitive,
+                                             cgltf_attribute_type type) {
+  for (cgltf_size i = 0; i < primitive->attributes_count; ++i) {
+    const cgltf_attribute* attrib = &primitive->attributes[i];
+    if (attrib->type == type) {
+      return attrib;
+    }
+  }
+  return NULL;
+}
+
+static bool has_attribute(const cgltf_primitive* primitive,
+                          cgltf_attribute_type type) {
+  return find_attribute(primitive, type) != NULL;
+}
+
+static bool has_positions3d(const cgltf_primitive* primitive) {
+  const cgltf_attribute* attrib =
+      find_attribute(primitive, cgltf_attribute_type_position);
+  if (attrib) {
+    return attrib->data->type == cgltf_type_vec3;
+  }
+  return false;
+}
+
+static bool has_normals(const cgltf_primitive* primitive) {
+  return has_attribute(primitive, cgltf_attribute_type_normal);
+}
+
+static bool has_texcoords(const cgltf_primitive* primitive) {
+  return has_attribute(primitive, cgltf_attribute_type_texcoord);
+}
+
+static bool has_tangents(const cgltf_primitive* primitive) {
+  return has_attribute(primitive, cgltf_attribute_type_tangent);
+}
+
+static bool has_indices(const cgltf_primitive* primitive) {
+  return primitive->indices != 0;
+}
+
+static cgltfTangentBuffer compute_tangents(const cgltf_options* options,
+                                           const cgltf_data* data,
+                                           cgltf_primitive* primitive) {
+  cgltfTangentBuffer buffer = {0};
+  SMikkUserData user = {0};
+  cgltf_size num_verts = 0;
+
+  user.primitive = primitive;
+
+  if (primitive->indices != NULL) {
+    const cgltf_accessor* accessor = primitive->indices;
+    const cgltf_buffer_view* view = accessor->buffer_view;
+    const cgltf_size offset_bytes = accessor->offset + view->offset;
+    const void* buffer_data = view->buffer->data + offset_bytes;
+    const void* buffer_end = view->buffer->data + view->offset + view->size;
+
+    user.indices.start = buffer_data;
+    user.indices.end = buffer_end;
+    // Indices are tightly packed, stride 0.
+    user.indices.stride_bytes =
+        default_stride(accessor->type, accessor->component_type);
+    user.indices.type = accessor->component_type;
+  }
+
+  for (cgltf_size i = 0; i < primitive->attributes_count; ++i) {
+    const cgltf_attribute* attrib = &primitive->attributes[i];
+
+    if ((attrib->type == cgltf_attribute_type_position) ||
+        (attrib->type == cgltf_attribute_type_normal) ||
+        (attrib->type == cgltf_attribute_type_texcoord)) {
+      const cgltf_accessor* accessor = attrib->data;
+      const cgltf_buffer_view* view = accessor->buffer_view;
+      const cgltf_buffer* buffer = view->buffer;
+      const cgltf_size offset_bytes = accessor->offset + view->offset;
+      const cgltf_size stride_bytes =
+          view->stride > 0
+              ? view->stride
+              : default_stride(accessor->type, accessor->component_type);
+      // const cgltf_size size_bytes = view->size;
+      const void* buffer_data = view->buffer->data + offset_bytes;
+      const void* buffer_end = view->buffer->data + view->offset + view->size;
+
+      Buffer* attrib_buffer = 0;
+
+      if (attrib->type == cgltf_attribute_type_position) {
+        // glTF currently mandates vec3 for positions. Caller should ensure
+        // this.
+        assert(accessor->type == cgltf_type_vec3);
+        num_verts = attrib->data->count;
+        attrib_buffer = &user.positions;
+      } else if (attrib->type == cgltf_attribute_type_normal) {
+        attrib_buffer = &user.normals;
+      } else if (attrib->type == cgltf_attribute_type_texcoord) {
+        attrib_buffer = &user.texcoords;
+      }
+
+      attrib_buffer->start = buffer_data;
+      attrib_buffer->end = buffer_end;
+      attrib_buffer->stride_bytes = stride_bytes;
+      attrib_buffer->type = accessor->component_type;
+    }
+  }
+
+  assert(user.positions.start);
+  assert(user.positions.end);
+  assert(user.normals.start);
+  assert(user.normals.end);
+  assert(user.texcoords.start);
+  assert(user.texcoords.end);
+  assert(num_verts > 0);
+
+  const cgltf_size tangents_size_bytes =
+      num_verts * NUM_TANGENT_COMPONENTS * sizeof(float);
+
+  user.tangents = CGLTF_OPTIONS_MALLOC(tangents_size_bytes);
+  if (!user.tangents) {
+    return buffer;
+  }
+
+  SMikkTSpaceInterface interface = (SMikkTSpaceInterface){
+      .m_getNumFaces = SMikk_get_num_faces,
+      .m_getNumVerticesOfFace = SMikk_get_num_vertices_of_face,
+      .m_getPosition = SMikk_get_position,
+      .m_getNormal = SMikk_get_normal,
+      .m_getTexCoord = SMikk_get_texcoord,
+      .m_setTSpaceBasic = SMikk_set_TSpace_basic,
+  };
+  const SMikkTSpaceContext context = (SMikkTSpaceContext){
+      .m_pInterface = &interface,
+      .m_pUserData = &user,
+  };
+  if (!genTangSpaceDefault(&context)) {
+    return buffer;
+  }
+
+  buffer.data = user.tangents;
+  buffer.size_bytes = tangents_size_bytes;
+  buffer.primitive = primitive;
+
+  return buffer;
+}
+
+static void process_primitive(const cgltf_options* options,
+                              const cgltf_data* data,
+                              cgltf_primitive* primitive,
+                              cgltfTangentBuffer* tangent_buffers,
+                              cgltf_size* num_tangent_buffers) {
+  DLOG("Processing primitive\n");
+  cgltf_size cur_buffer = 0;
+  // TODO: MikkTSpace should not be used with models with vertex indices. One
+  // workaround is to unindex the mesh, compute tangents, and then re-index it.
+  if (((primitive->type == cgltf_primitive_type_triangle_fan) ||
+       (primitive->type == cgltf_primitive_type_triangle_strip) ||
+       (primitive->type == cgltf_primitive_type_triangles)) &&
+      has_normal_map(primitive) && !has_tangents(primitive) &&
+      has_positions3d(primitive) && has_normals(primitive) &&
+      has_texcoords(primitive) && !has_indices(primitive)) {
+    *num_tangent_buffers += 1;
+    if (tangent_buffers) {
+      DLOG("Model with normal map missing tangents detected\n");
+      tangent_buffers[cur_buffer] = compute_tangents(options, data, primitive);
+      if (tangent_buffers[cur_buffer].data) {
+        DLOG("Tangents computed\n");
+      }
+      cur_buffer++;
+    }
+  }
+}
+
+cgltf_result cgltf_compute_tangents(const cgltf_options* input_options,
+                                    const cgltf_data* data,
+                                    cgltfTangentBuffer** tangent_buffers,
+                                    cgltf_size* num_tangent_buffers) {
+  if ((input_options == NULL) || (data == NULL)) {
+    return cgltf_result_invalid_options;
+  }
+
+  DLOG("cgltf_compute_tangents\n");
+
+  cgltf_options options = *input_options;
+  if (options.memory.alloc == NULL) {
+    options.memory.alloc = &cgltf_default_alloc;
+  }
+  if (options.memory.free == NULL) {
+    options.memory.free = &cgltf_default_free;
+  }
+
+  // First pass: compute the number of tangent buffers to be created.
+  *num_tangent_buffers = 0;
+  for (cgltf_size mesh_idx = 0; mesh_idx < data->meshes_count; ++mesh_idx) {
+    const cgltf_mesh* mesh = &data->meshes[mesh_idx];
+
+    for (cgltf_size prim_idx = 0; prim_idx < mesh->primitives_count;
+         ++prim_idx) {
+      // Pass in null for the tangent buffers to just compute the number of
+      // buffers.
+      process_primitive(&options, data, &mesh->primitives[prim_idx], 0,
+                        num_tangent_buffers);
+    }
+  }
+  DLOG("Number of primitives to be patched: %lu\n", *num_tangent_buffers);
+
+  // Second pass: compute the tangents.
+  if (*num_tangent_buffers > 0) {
+    *tangent_buffers =
+        options.memory.alloc(options.memory.user_data,
+                             *num_tangent_buffers * sizeof(cgltfTangentBuffer));
+    if (!*tangent_buffers) {
+      return cgltf_result_out_of_memory;
+    }
+
+    cgltf_size tangent_buffers_computed = 0;
+
+    for (cgltf_size mesh_idx = 0; mesh_idx < data->meshes_count; ++mesh_idx) {
+      const cgltf_mesh* mesh = &data->meshes[mesh_idx];
+
+      for (cgltf_size prim_idx = 0; prim_idx < mesh->primitives_count;
+           ++prim_idx) {
+        process_primitive(&options, data, &mesh->primitives[prim_idx],
+                          *tangent_buffers, &tangent_buffers_computed);
+      }
+    }
+
+    assert(tangent_buffers_computed == *num_tangent_buffers);
+  }
+
+  return cgltf_result_success;
+}
diff --git a/gfx/contrib/cgltf-tangents/cgltf_tangents.h b/gfx/contrib/cgltf-tangents/cgltf_tangents.h
new file mode 100644
index 0000000..79e3502
--- /dev/null
+++ b/gfx/contrib/cgltf-tangents/cgltf_tangents.h
@@ -0,0 +1,67 @@
+/*
+Copyright 2022 Marc Sunet
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+this list of conditions and the following disclaimer in the documentation and/or
+other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+#ifndef CGLTF_TANGENTS_H_INCLUDED__
+#define CGLTF_TANGENTS_H_INCLUDED__
+
+#include <cgltf.h>
+
+/// A buffer that holds tangent vectors.
+///
+/// Tangent vectors are tightly packed in the array.
+///
+/// Tangent vectors have 4 coordinates: (X,Y,Z) for the vector, W for the sign.
+/// The usual rules of MikkTSpace apply, namely that the bitangent should be
+/// computed as:
+///
+///   bitangent = tangent.w * cross(normal, tangent.xyz);
+///
+/// Refer to the MikkTSpace documentation for more details.
+///
+/// The primitive pointer points to the mesh primitive for which the tangents in
+/// this buffer were computed. When your application loads mesh primitives, it
+/// can scan the cgltfTangetBuffer array outputed by cgltf_compute_tangents() to
+/// see whether tangents were computed for the mesh primitive.
+typedef struct cgltfTangentBuffer {
+  void* data;                 // X-coordinate of the first tangent vector.
+  cgltf_size size_bytes;      // Total Size of data in bytes.
+  cgltf_primitive* primitive; // The primitive these tangents belong to.
+} cgltfTangentBuffer;
+
+/// Compute tangent vectors for normal-mapped mesh primitives missing them.
+///
+/// cgltf_options can be zeroed out but must be non-null.
+///
+/// cgltf_data is the scene previously loaded by cgltf.
+///
+/// out_tangent_buffers is an output array of tangent buffers, one buffer per
+/// mesh primitive for which tangents were computed.
+///
+/// out_num_tangent_buffers is the number of tangent buffers in the output
+/// array.
+cgltf_result cgltf_compute_tangents(const cgltf_options*, const cgltf_data*,
+                                    cgltfTangentBuffer** out_tangent_buffers,
+                                    cgltf_size* out_num_tangent_buffers);
+
+#endif // CGLTF_TANGENTS_H_INCLUDED__
diff --git a/gfx/contrib/cgltf-tangents/test/CMakeLists.txt b/gfx/contrib/cgltf-tangents/test/CMakeLists.txt
new file mode 100644
index 0000000..422c950
--- /dev/null
+++ b/gfx/contrib/cgltf-tangents/test/CMakeLists.txt
@@ -0,0 +1,11 @@
+cmake_minimum_required(VERSION 3.0)
+
+project (cgltf-test)
+
+add_executable(cgltf-test
+  main.c)
+
+target_link_libraries(cgltf-test
+  cgltf
+  cgltf-tangents
+  -lm)
diff --git a/gfx/contrib/cgltf-tangents/test/main.c b/gfx/contrib/cgltf-tangents/test/main.c
new file mode 100644
index 0000000..0d70008
--- /dev/null
+++ b/gfx/contrib/cgltf-tangents/test/main.c
@@ -0,0 +1,86 @@
+/*
+Copyright 2022 Marc Sunet
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+this list of conditions and the following disclaimer in the documentation and/or
+other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+#include <cgltf_tangents.h>
+#define CGLTF_IMPLEMENTATION
+#include <cgltf.h>
+
+#include <stdio.h>
+
+void print_tangent_buffer(const cgltfTangentBuffer* buffer, int max_vectors) {
+  printf("Tangent buffer for primitive (%p) (%lu bytes):\n", buffer->primitive,
+         buffer->size_bytes);
+
+  const float* xyzw = (const float*)buffer->data;
+  const float* end = (const float*)(buffer->data + buffer->size_bytes);
+
+  for (int i = 0; i < max_vectors && xyzw < end; ++i, xyzw += 4) {
+    printf("(%3.2f, %3.2f, %3.2f, sign: %3.2f)\n", *xyzw, *(xyzw + 1),
+           *(xyzw + 2), *(xyzw + 3));
+  }
+  printf("--------------------");
+}
+
+void usage(const char* argv0) {
+  fprintf(stderr, "Usage: %s <glTF file path>\n", argv0);
+}
+
+int main(int argc, const char** argv) {
+  cgltf_options options = {0};
+  cgltf_data* data = NULL;
+
+  if (argc != 2) {
+    usage(argv[0]);
+    return 0;
+  }
+
+  const char* filepath = argv[1];
+
+  cgltf_result result = cgltf_parse_file(&options, filepath, &data);
+  if (result != cgltf_result_success) {
+    cgltf_free(data);
+    return 1;
+  }
+
+  // Must call cgltf_load_buffers() to load buffer data.
+  result = cgltf_load_buffers(&options, data, filepath);
+  if (result != cgltf_result_success) {
+    cgltf_free(data);
+    return 2;
+  }
+
+  cgltfTangentBuffer* tangent_buffers = 0;
+  cgltf_size num_tangent_buffers = 0;
+  cgltf_compute_tangents(&options, data, &tangent_buffers,
+                         &num_tangent_buffers);
+
+  // cgltf scene not needed beyond this point.
+  cgltf_free(data);
+
+  for (cgltf_size i = 0; i < num_tangent_buffers; ++i) {
+    print_tangent_buffer(tangent_buffers, 10);
+  }
+
+  return 0;
+}
diff --git a/gfx/contrib/cgltf/CMakeLists.txt b/gfx/contrib/cgltf/CMakeLists.txt
new file mode 100644
index 0000000..0ac840a
--- /dev/null
+++ b/gfx/contrib/cgltf/CMakeLists.txt
@@ -0,0 +1,8 @@
+cmake_minimum_required(VERSION 3.16)
+
+project(cgltf)
+
+add_library(cgltf INTERFACE)
+
+target_include_directories(cgltf INTERFACE
+  ${CMAKE_CURRENT_SOURCE_DIR})
diff --git a/gfx/contrib/cgltf/LICENSE b/gfx/contrib/cgltf/LICENSE
new file mode 100644
index 0000000..0afe8c7
--- /dev/null
+++ b/gfx/contrib/cgltf/LICENSE
@@ -0,0 +1,7 @@
+Copyright (c) 2018 Johannes Kuhlmann
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/gfx/contrib/cgltf/README.md b/gfx/contrib/cgltf/README.md
new file mode 100644
index 0000000..3b49d52
--- /dev/null
+++ b/gfx/contrib/cgltf/README.md
@@ -0,0 +1,154 @@
+# :diamond_shape_with_a_dot_inside: cgltf
+**Single-file/stb-style C glTF loader and writer**
+
+[![Build Status](https://travis-ci.org/jkuhlmann/cgltf.svg?branch=master)](https://travis-ci.org/jkuhlmann/cgltf)
+
+Used in: [bgfx](https://github.com/bkaradzic/bgfx), [Filament](https://github.com/google/filament), [meshoptimizer](https://github.com/zeux/meshoptimizer), [raylib](https://github.com/raysan5/raylib), and more!
+
+## Usage: Loading
+Loading from file:
+```c
+#define CGLTF_IMPLEMENTATION
+#include "cgltf.h"
+
+cgltf_options options = {0};
+cgltf_data* data = NULL;
+cgltf_result result = cgltf_parse_file(&options, "scene.gltf", &data);
+if (result == cgltf_result_success)
+{
+        /* TODO make awesome stuff */
+        cgltf_free(data);
+}
+```
+
+Loading from memory:
+```c
+#define CGLTF_IMPLEMENTATION
+#include "cgltf.h"
+
+void* buf; /* Pointer to glb or gltf file data */
+size_t size; /* Size of the file data */
+
+cgltf_options options = {0};
+cgltf_data* data = NULL;
+cgltf_result result = cgltf_parse(&options, buf, size, &data);
+if (result == cgltf_result_success)
+{
+        /* TODO make awesome stuff */
+        cgltf_free(data);
+}
+```
+
+Note that cgltf does not load the contents of extra files such as buffers or images into memory by default. You'll need to read these files yourself using URIs from `data.buffers[]` or `data.images[]` respectively.
+For buffer data, you can alternatively call `cgltf_load_buffers`, which will use `FILE*` APIs to open and read buffer files.
+
+**For more in-depth documentation and a description of the public interface refer to the top of the `cgltf.h` file.**
+
+## Usage: Writing
+When writing glTF data, you need a valid `cgltf_data` structure that represents a valid glTF document. You can construct such a structure yourself or load it using the loader functions described above. The writer functions do not deallocate any memory. So, you either have to do it manually or call `cgltf_free()` if you got the data by loading it from a glTF document.
+
+Writing to file:
+```c
+#define CGLTF_IMPLEMENTATION
+#define CGLTF_WRITE_IMPLEMENTATION
+#include "cgltf_write.h"
+
+cgltf_options options = {0};
+cgltf_data* data = /* TODO must be valid data */;
+cgltf_result result = cgltf_write_file(&options, "out.gltf", data);
+if (result != cgltf_result_success)
+{
+        /* TODO handle error */
+}
+```
+
+Writing to memory:
+```c
+#define CGLTF_IMPLEMENTATION
+#define CGLTF_WRITE_IMPLEMENTATION
+#include "cgltf_write.h"
+cgltf_options options = {0};
+cgltf_data* data = /* TODO must be valid data */;
+
+cgltf_size size = cgltf_write(&options, NULL, 0, data);
+
+char* buf = malloc(size);
+
+cgltf_size written = cgltf_write(&options, buf, size, data);
+if (written != size)
+{
+        /* TODO handle error */
+}
+```
+
+Note that cgltf does not write the contents of extra files such as buffers or images. You'll need to write this data yourself.
+
+Writing does not yet support "extras" data.
+
+**For more in-depth documentation and a description of the public interface refer to the top of the `cgltf_write.h` file.**
+
+
+## Features
+cgltf supports core glTF 2.0:
+- glb (binary files) and gltf (JSON files)
+- meshes (including accessors, buffer views, buffers)
+- materials (including textures, samplers, images)
+- scenes and nodes
+- skins
+- animations
+- cameras
+- morph targets
+- extras data
+
+cgltf also supports some glTF extensions:
+- KHR_draco_mesh_compression (requires a library like [Google's Draco](https://github.com/google/draco) for decompression though)
+- KHR_lights_punctual
+- KHR_materials_clearcoat
+- KHR_materials_ior
+- KHR_materials_pbrSpecularGlossiness
+- KHR_materials_specular
+- KHR_materials_transmission
+- KHR_materials_unlit
+- KHR_texture_transform
+
+cgltf does **not** yet support unlisted extensions. However, unlisted extensions can be accessed via "extensions" member on objects.
+
+## Building
+The easiest approach is to integrate the `cgltf.h` header file into your project. If you are unfamiliar with single-file C libraries (also known as stb-style libraries), this is how it goes:
+
+1. Include `cgltf.h` where you need the functionality.
+1. Have exactly one source file that defines `CGLTF_IMPLEMENTATION` before including `cgltf.h`.
+1. Use the cgltf functions as described above.
+
+Support for writing can be found in a separate file called `cgltf_write.h` (which includes `cgltf.h`). Building it works analogously using the `CGLTF_WRITE_IMPLEMENTATION` define.
+
+## Contributing
+Everyone is welcome to contribute to the library. If you find any problems, you can submit them using [GitHub's issue system](https://github.com/jkuhlmann/cgltf/issues). If you want to contribute code, you should fork the project and then send a pull request.
+
+
+## Dependencies
+None.
+
+C headers being used by implementation:
+```
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <limits.h>
+```
+
+Note, this library has a copy of the [JSMN JSON parser](https://github.com/zserge/jsmn) embedded in its source.
+
+## Testing
+There is a Python script in the `test/` folder that retrieves the glTF 2.0 sample files from the glTF-Sample-Models repository (https://github.com/KhronosGroup/glTF-Sample-Models/tree/master/2.0) and runs the library against all gltf and glb files.
+
+Here's one way to build and run the test:
+
+    cd test ; mkdir build ; cd build ; cmake .. -DCMAKE_BUILD_TYPE=Debug
+    make -j
+    cd ..
+    ./test_all.py
+
+There is also a llvm-fuzz test in `fuzz/`. See http://llvm.org/docs/LibFuzzer.html for more information.
diff --git a/gfx/contrib/cgltf/cgltf.h b/gfx/contrib/cgltf/cgltf.h
new file mode 100644
index 0000000..077cf36
--- /dev/null
+++ b/gfx/contrib/cgltf/cgltf.h
@@ -0,0 +1,5746 @@
+/**
+ * cgltf - a single-file glTF 2.0 parser written in C99.
+ *
+ * Version: 1.7
+ *
+ * Website: https://github.com/jkuhlmann/cgltf
+ *
+ * Distributed under the MIT License, see notice at the end of this file.
+ *
+ * Building:
+ * Include this file where you need the struct and function
+ * declarations. Have exactly one source file where you define
+ * `CGLTF_IMPLEMENTATION` before including this file to get the
+ * function definitions.
+ *
+ * Reference:
+ * `cgltf_result cgltf_parse(const cgltf_options*, const void*,
+ * cgltf_size, cgltf_data**)` parses both glTF and GLB data. If
+ * this function returns `cgltf_result_success`, you have to call
+ * `cgltf_free()` on the created `cgltf_data*` variable.
+ * Note that contents of external files for buffers and images are not
+ * automatically loaded. You'll need to read these files yourself using
+ * URIs in the `cgltf_data` structure.
+ *
+ * `cgltf_options` is the struct passed to `cgltf_parse()` to control
+ * parts of the parsing process. You can use it to force the file type
+ * and provide memory allocation as well as file operation callbacks. 
+ * Should be zero-initialized to trigger default behavior.
+ *
+ * `cgltf_data` is the struct allocated and filled by `cgltf_parse()`.
+ * It generally mirrors the glTF format as described by the spec (see
+ * https://github.com/KhronosGroup/glTF/tree/master/specification/2.0).
+ *
+ * `void cgltf_free(cgltf_data*)` frees the allocated `cgltf_data`
+ * variable.
+ *
+ * `cgltf_result cgltf_load_buffers(const cgltf_options*, cgltf_data*,
+ * const char* gltf_path)` can be optionally called to open and read buffer
+ * files using the `FILE*` APIs. The `gltf_path` argument is the path to
+ * the original glTF file, which allows the parser to resolve the path to
+ * buffer files.
+ *
+ * `cgltf_result cgltf_load_buffer_base64(const cgltf_options* options,
+ * cgltf_size size, const char* base64, void** out_data)` decodes
+ * base64-encoded data content. Used internally by `cgltf_load_buffers()`
+ * and may be useful if you're not dealing with normal files.
+ *
+ * `cgltf_result cgltf_parse_file(const cgltf_options* options, const
+ * char* path, cgltf_data** out_data)` can be used to open the given
+ * file using `FILE*` APIs and parse the data using `cgltf_parse()`.
+ *
+ * `cgltf_result cgltf_validate(cgltf_data*)` can be used to do additional
+ * checks to make sure the parsed glTF data is valid.
+ *
+ * `cgltf_node_transform_local` converts the translation / rotation / scale properties of a node
+ * into a mat4.
+ *
+ * `cgltf_node_transform_world` calls `cgltf_node_transform_local` on every ancestor in order
+ * to compute the root-to-node transformation.
+ *
+ * `cgltf_accessor_unpack_floats` reads in the data from an accessor, applies sparse data (if any),
+ * and converts them to floating point. Assumes that `cgltf_load_buffers` has already been called.
+ * By passing null for the output pointer, users can find out how many floats are required in the
+ * output buffer.
+ *
+ * `cgltf_accessor_num_components` is a tiny utility that tells you the dimensionality of
+ * a certain accessor type. This can be used before `cgltf_accessor_unpack_floats` to help allocate
+ * the necessary amount of memory.
+ *
+ * `cgltf_accessor_read_float` reads a certain element from a non-sparse accessor and converts it to
+ * floating point, assuming that `cgltf_load_buffers` has already been called. The passed-in element
+ * size is the number of floats in the output buffer, which should be in the range [1, 16]. Returns
+ * false if the passed-in element_size is too small, or if the accessor is sparse.
+ *
+ * `cgltf_accessor_read_uint` is similar to its floating-point counterpart, but limited to reading
+ * vector types and does not support matrix types. The passed-in element size is the number of uints
+ * in the output buffer, which should be in the range [1, 4]. Returns false if the passed-in 
+ * element_size is too small, or if the accessor is sparse.
+ *
+ * `cgltf_accessor_read_index` is similar to its floating-point counterpart, but it returns size_t
+ * and only works with single-component data types.
+ *
+ * `cgltf_result cgltf_copy_extras_json(const cgltf_data*, const cgltf_extras*,
+ * char* dest, cgltf_size* dest_size)` allows users to retrieve the "extras" data that
+ * can be attached to many glTF objects (which can be arbitrary JSON data). The
+ * `cgltf_extras` struct stores the offsets of the start and end of the extras JSON data
+ * as it appears in the complete glTF JSON data. This function copies the extras data
+ * into the provided buffer. If `dest` is NULL, the length of the data is written into
+ * `dest_size`. You can then parse this data using your own JSON parser
+ * or, if you've included the cgltf implementation using the integrated JSMN JSON parser.
+ */
+#ifndef CGLTF_H_INCLUDED__
+#define CGLTF_H_INCLUDED__
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef size_t cgltf_size;
+typedef float cgltf_float;
+typedef int cgltf_int;
+typedef unsigned int cgltf_uint;
+typedef int cgltf_bool;
+
+typedef enum cgltf_file_type
+{
+        cgltf_file_type_invalid,
+        cgltf_file_type_gltf,
+        cgltf_file_type_glb,
+} cgltf_file_type;
+
+typedef enum cgltf_result
+{
+        cgltf_result_success,
+        cgltf_result_data_too_short,
+        cgltf_result_unknown_format,
+        cgltf_result_invalid_json,
+        cgltf_result_invalid_gltf,
+        cgltf_result_invalid_options,
+        cgltf_result_file_not_found,
+        cgltf_result_io_error,
+        cgltf_result_out_of_memory,
+        cgltf_result_legacy_gltf,
+} cgltf_result;
+
+typedef struct cgltf_memory_options
+{
+        void* (*alloc)(void* user, cgltf_size size);
+        void (*free) (void* user, void* ptr);
+        void* user_data;
+} cgltf_memory_options;
+
+typedef struct cgltf_file_options
+{
+        cgltf_result(*read)(const struct cgltf_memory_options* memory_options, const struct cgltf_file_options* file_options, const char* path, cgltf_size* size, void** data);
+        void (*release)(const struct cgltf_memory_options* memory_options, const struct cgltf_file_options* file_options, void* data);
+        void* user_data;
+} cgltf_file_options;
+
+typedef struct cgltf_options
+{
+        cgltf_file_type type; /* invalid == auto detect */
+        cgltf_size json_token_count; /* 0 == auto */
+        cgltf_memory_options memory;
+        cgltf_file_options file;
+} cgltf_options;
+
+typedef enum cgltf_buffer_view_type
+{
+        cgltf_buffer_view_type_invalid,
+        cgltf_buffer_view_type_indices,
+        cgltf_buffer_view_type_vertices,
+} cgltf_buffer_view_type;
+
+typedef enum cgltf_attribute_type
+{
+        cgltf_attribute_type_invalid,
+        cgltf_attribute_type_position,
+        cgltf_attribute_type_normal,
+        cgltf_attribute_type_tangent,
+        cgltf_attribute_type_texcoord,
+        cgltf_attribute_type_color,
+        cgltf_attribute_type_joints,
+        cgltf_attribute_type_weights,
+} cgltf_attribute_type;
+
+typedef enum cgltf_component_type
+{
+        cgltf_component_type_invalid,
+        cgltf_component_type_r_8, /* BYTE */
+        cgltf_component_type_r_8u, /* UNSIGNED_BYTE */
+        cgltf_component_type_r_16, /* SHORT */
+        cgltf_component_type_r_16u, /* UNSIGNED_SHORT */
+        cgltf_component_type_r_32u, /* UNSIGNED_INT */
+        cgltf_component_type_r_32f, /* FLOAT */
+} cgltf_component_type;
+
+typedef enum cgltf_type
+{
+        cgltf_type_invalid,
+        cgltf_type_scalar,
+        cgltf_type_vec2,
+        cgltf_type_vec3,
+        cgltf_type_vec4,
+        cgltf_type_mat2,
+        cgltf_type_mat3,
+        cgltf_type_mat4,
+} cgltf_type;
+
+typedef enum cgltf_primitive_type
+{
+        cgltf_primitive_type_points,
+        cgltf_primitive_type_lines,
+        cgltf_primitive_type_line_loop,
+        cgltf_primitive_type_line_strip,
+        cgltf_primitive_type_triangles,
+        cgltf_primitive_type_triangle_strip,
+        cgltf_primitive_type_triangle_fan,
+} cgltf_primitive_type;
+
+typedef enum cgltf_alpha_mode
+{
+        cgltf_alpha_mode_opaque,
+        cgltf_alpha_mode_mask,
+        cgltf_alpha_mode_blend,
+} cgltf_alpha_mode;
+
+typedef enum cgltf_animation_path_type {
+        cgltf_animation_path_type_invalid,
+        cgltf_animation_path_type_translation,
+        cgltf_animation_path_type_rotation,
+        cgltf_animation_path_type_scale,
+        cgltf_animation_path_type_weights,
+} cgltf_animation_path_type;
+
+typedef enum cgltf_interpolation_type {
+        cgltf_interpolation_type_linear,
+        cgltf_interpolation_type_step,
+        cgltf_interpolation_type_cubic_spline,
+} cgltf_interpolation_type;
+
+typedef enum cgltf_camera_type {
+        cgltf_camera_type_invalid,
+        cgltf_camera_type_perspective,
+        cgltf_camera_type_orthographic,
+} cgltf_camera_type;
+
+typedef enum cgltf_light_type {
+        cgltf_light_type_invalid,
+        cgltf_light_type_directional,
+        cgltf_light_type_point,
+        cgltf_light_type_spot,
+} cgltf_light_type;
+
+typedef struct cgltf_extras {
+        cgltf_size start_offset;
+        cgltf_size end_offset;
+} cgltf_extras;
+
+typedef struct cgltf_extension {
+        char* name;
+        char* data;
+} cgltf_extension;
+
+typedef struct cgltf_buffer
+{
+        cgltf_size size;
+        char* uri;
+        void* data; /* loaded by cgltf_load_buffers */
+        cgltf_extras extras;
+        cgltf_size extensions_count;
+        cgltf_extension* extensions;
+} cgltf_buffer;
+
+typedef struct cgltf_buffer_view
+{
+        cgltf_buffer* buffer;
+        cgltf_size offset;
+        cgltf_size size;
+        cgltf_size stride; /* 0 == automatically determined by accessor */
+        cgltf_buffer_view_type type;
+        cgltf_extras extras;
+        cgltf_size extensions_count;
+        cgltf_extension* extensions;
+} cgltf_buffer_view;
+
+typedef struct cgltf_accessor_sparse
+{
+        cgltf_size count;
+        cgltf_buffer_view* indices_buffer_view;
+        cgltf_size indices_byte_offset;
+        cgltf_component_type indices_component_type;
+        cgltf_buffer_view* values_buffer_view;
+        cgltf_size values_byte_offset;
+        cgltf_extras extras;
+        cgltf_extras indices_extras;
+        cgltf_extras values_extras;
+        cgltf_size extensions_count;
+        cgltf_extension* extensions;
+        cgltf_size indices_extensions_count;
+        cgltf_extension* indices_extensions;
+        cgltf_size values_extensions_count;
+        cgltf_extension* values_extensions;
+} cgltf_accessor_sparse;
+
+typedef struct cgltf_accessor
+{
+        cgltf_component_type component_type;
+        cgltf_bool normalized;
+        cgltf_type type;
+        cgltf_size offset;
+        cgltf_size count;
+        cgltf_size stride;
+        cgltf_buffer_view* buffer_view;
+        cgltf_bool has_min;
+        cgltf_float min[16];
+        cgltf_bool has_max;
+        cgltf_float max[16];
+        cgltf_bool is_sparse;
+        cgltf_accessor_sparse sparse;
+        cgltf_extras extras;
+        cgltf_size extensions_count;
+        cgltf_extension* extensions;
+} cgltf_accessor;
+
+typedef struct cgltf_attribute
+{
+        char* name;
+        cgltf_attribute_type type;
+        cgltf_int index;
+        cgltf_accessor* data;
+} cgltf_attribute;
+
+typedef struct cgltf_image
+{
+        char* name;
+        char* uri;
+        cgltf_buffer_view* buffer_view;
+        char* mime_type;
+        cgltf_extras extras;
+        cgltf_size extensions_count;
+        cgltf_extension* extensions;
+} cgltf_image;
+
+typedef struct cgltf_sampler
+{
+        cgltf_int mag_filter;
+        cgltf_int min_filter;
+        cgltf_int wrap_s;
+        cgltf_int wrap_t;
+        cgltf_extras extras;
+        cgltf_size extensions_count;
+        cgltf_extension* extensions;
+} cgltf_sampler;
+
+typedef struct cgltf_texture
+{
+        char* name;
+        cgltf_image* image;
+        cgltf_sampler* sampler;
+        cgltf_extras extras;
+        cgltf_size extensions_count;
+        cgltf_extension* extensions;
+} cgltf_texture;
+
+typedef struct cgltf_texture_transform
+{
+        cgltf_float offset[2];
+        cgltf_float rotation;
+        cgltf_float scale[2];
+        cgltf_int texcoord;
+} cgltf_texture_transform;
+
+typedef struct cgltf_texture_view
+{
+        cgltf_texture* texture;
+        cgltf_int texcoord;
+        cgltf_float scale; /* equivalent to strength for occlusion_texture */
+        cgltf_bool has_transform;
+        cgltf_texture_transform transform;
+        cgltf_extras extras;
+        cgltf_size extensions_count;
+        cgltf_extension* extensions;
+} cgltf_texture_view;
+
+typedef struct cgltf_pbr_metallic_roughness
+{
+        cgltf_texture_view base_color_texture;
+        cgltf_texture_view metallic_roughness_texture;
+
+        cgltf_float base_color_factor[4];
+        cgltf_float metallic_factor;
+        cgltf_float roughness_factor;
+
+        cgltf_extras extras;
+} cgltf_pbr_metallic_roughness;
+
+typedef struct cgltf_pbr_specular_glossiness
+{
+        cgltf_texture_view diffuse_texture;
+        cgltf_texture_view specular_glossiness_texture;
+
+        cgltf_float diffuse_factor[4];
+        cgltf_float specular_factor[3];
+        cgltf_float glossiness_factor;
+} cgltf_pbr_specular_glossiness;
+
+typedef struct cgltf_clearcoat
+{
+        cgltf_texture_view clearcoat_texture;
+        cgltf_texture_view clearcoat_roughness_texture;
+        cgltf_texture_view clearcoat_normal_texture;
+
+        cgltf_float clearcoat_factor;
+        cgltf_float clearcoat_roughness_factor;
+} cgltf_clearcoat;
+
+typedef struct cgltf_transmission
+{
+        cgltf_texture_view transmission_texture;
+        cgltf_float transmission_factor;
+} cgltf_transmission;
+
+typedef struct cgltf_ior
+{
+        cgltf_float ior;
+} cgltf_ior;
+
+typedef struct cgltf_specular
+{
+        cgltf_texture_view specular_texture;
+        cgltf_float specular_color_factor[3];
+        cgltf_float specular_factor;
+} cgltf_specular;
+
+typedef struct cgltf_material
+{
+        char* name;
+        cgltf_bool has_pbr_metallic_roughness;
+        cgltf_bool has_pbr_specular_glossiness;
+        cgltf_bool has_clearcoat;
+        cgltf_bool has_transmission;
+        cgltf_bool has_ior;
+        cgltf_bool has_specular;
+        cgltf_pbr_metallic_roughness pbr_metallic_roughness;
+        cgltf_pbr_specular_glossiness pbr_specular_glossiness;
+        cgltf_clearcoat clearcoat;
+        cgltf_ior ior;
+        cgltf_specular specular;
+        cgltf_transmission transmission;
+        cgltf_texture_view normal_texture;
+        cgltf_texture_view occlusion_texture;
+        cgltf_texture_view emissive_texture;
+        cgltf_float emissive_factor[3];
+        cgltf_alpha_mode alpha_mode;
+        cgltf_float alpha_cutoff;
+        cgltf_bool double_sided;
+        cgltf_bool unlit;
+        cgltf_extras extras;
+        cgltf_size extensions_count;
+        cgltf_extension* extensions;
+} cgltf_material;
+
+typedef struct cgltf_morph_target {
+        cgltf_attribute* attributes;
+        cgltf_size attributes_count;
+} cgltf_morph_target;
+
+typedef struct cgltf_draco_mesh_compression {
+        cgltf_buffer_view* buffer_view;
+        cgltf_attribute* attributes;
+        cgltf_size attributes_count;
+} cgltf_draco_mesh_compression;
+
+typedef struct cgltf_primitive {
+        cgltf_primitive_type type;
+        cgltf_accessor* indices;
+        cgltf_material* material;
+        cgltf_attribute* attributes;
+        cgltf_size attributes_count;
+        cgltf_morph_target* targets;
+        cgltf_size targets_count;
+        cgltf_extras extras;
+        cgltf_bool has_draco_mesh_compression;
+        cgltf_draco_mesh_compression draco_mesh_compression;
+        cgltf_size extensions_count;
+        cgltf_extension* extensions;
+} cgltf_primitive;
+
+typedef struct cgltf_mesh {
+        char* name;
+        cgltf_primitive* primitives;
+        cgltf_size primitives_count;
+        cgltf_float* weights;
+        cgltf_size weights_count;
+        char** target_names;
+        cgltf_size target_names_count;
+        cgltf_extras extras;
+        cgltf_size extensions_count;
+        cgltf_extension* extensions;
+} cgltf_mesh;
+
+typedef struct cgltf_node cgltf_node;
+
+typedef struct cgltf_skin {
+        char* name;
+        cgltf_node** joints;
+        cgltf_size joints_count;
+        cgltf_node* skeleton;
+        cgltf_accessor* inverse_bind_matrices;
+        cgltf_extras extras;
+        cgltf_size extensions_count;
+        cgltf_extension* extensions;
+} cgltf_skin;
+
+typedef struct cgltf_camera_perspective {
+        cgltf_float aspect_ratio;
+        cgltf_float yfov;
+        cgltf_float zfar;
+        cgltf_float znear;
+        cgltf_extras extras;
+} cgltf_camera_perspective;
+
+typedef struct cgltf_camera_orthographic {
+        cgltf_float xmag;
+        cgltf_float ymag;
+        cgltf_float zfar;
+        cgltf_float znear;
+        cgltf_extras extras;
+} cgltf_camera_orthographic;
+
+typedef struct cgltf_camera {
+        char* name;
+        cgltf_camera_type type;
+        union {
+                cgltf_camera_perspective perspective;
+                cgltf_camera_orthographic orthographic;
+        } data;
+        cgltf_extras extras;
+        cgltf_size extensions_count;
+        cgltf_extension* extensions;
+} cgltf_camera;
+
+typedef struct cgltf_light {
+        char* name;
+        cgltf_float color[3];
+        cgltf_float intensity;
+        cgltf_light_type type;
+        cgltf_float range;
+        cgltf_float spot_inner_cone_angle;
+        cgltf_float spot_outer_cone_angle;
+} cgltf_light;
+
+struct cgltf_node {
+        char* name;
+        cgltf_node* parent;
+        cgltf_node** children;
+        cgltf_size children_count;
+        cgltf_skin* skin;
+        cgltf_mesh* mesh;
+        cgltf_camera* camera;
+        cgltf_light* light;
+        cgltf_float* weights;
+        cgltf_size weights_count;
+        cgltf_bool has_translation;
+        cgltf_bool has_rotation;
+        cgltf_bool has_scale;
+        cgltf_bool has_matrix;
+        cgltf_float translation[3];
+        cgltf_float rotation[4];
+        cgltf_float scale[3];
+        cgltf_float matrix[16];
+        cgltf_extras extras;
+        cgltf_size extensions_count;
+        cgltf_extension* extensions;
+};
+
+typedef struct cgltf_scene {
+        char* name;
+        cgltf_node** nodes;
+        cgltf_size nodes_count;
+        cgltf_extras extras;
+        cgltf_size extensions_count;
+        cgltf_extension* extensions;
+} cgltf_scene;
+
+typedef struct cgltf_animation_sampler {
+        cgltf_accessor* input;
+        cgltf_accessor* output;
+        cgltf_interpolation_type interpolation;
+        cgltf_extras extras;
+        cgltf_size extensions_count;
+        cgltf_extension* extensions;
+} cgltf_animation_sampler;
+
+typedef struct cgltf_animation_channel {
+        cgltf_animation_sampler* sampler;
+        cgltf_node* target_node;
+        cgltf_animation_path_type target_path;
+        cgltf_extras extras;
+        cgltf_size extensions_count;
+        cgltf_extension* extensions;
+} cgltf_animation_channel;
+
+typedef struct cgltf_animation {
+        char* name;
+        cgltf_animation_sampler* samplers;
+        cgltf_size samplers_count;
+        cgltf_animation_channel* channels;
+        cgltf_size channels_count;
+        cgltf_extras extras;
+        cgltf_size extensions_count;
+        cgltf_extension* extensions;
+} cgltf_animation;
+
+typedef struct cgltf_asset {
+        char* copyright;
+        char* generator;
+        char* version;
+        char* min_version;
+        cgltf_extras extras;
+        cgltf_size extensions_count;
+        cgltf_extension* extensions;
+} cgltf_asset;
+
+typedef struct cgltf_data
+{
+        cgltf_file_type file_type;
+        void* file_data;
+
+        cgltf_asset asset;
+
+        cgltf_mesh* meshes;
+        cgltf_size meshes_count;
+
+        cgltf_material* materials;
+        cgltf_size materials_count;
+
+        cgltf_accessor* accessors;
+        cgltf_size accessors_count;
+
+        cgltf_buffer_view* buffer_views;
+        cgltf_size buffer_views_count;
+
+        cgltf_buffer* buffers;
+        cgltf_size buffers_count;
+
+        cgltf_image* images;
+        cgltf_size images_count;
+
+        cgltf_texture* textures;
+        cgltf_size textures_count;
+
+        cgltf_sampler* samplers;
+        cgltf_size samplers_count;
+
+        cgltf_skin* skins;
+        cgltf_size skins_count;
+
+        cgltf_camera* cameras;
+        cgltf_size cameras_count;
+
+        cgltf_light* lights;
+        cgltf_size lights_count;
+
+        cgltf_node* nodes;
+        cgltf_size nodes_count;
+
+        cgltf_scene* scenes;
+        cgltf_size scenes_count;
+
+        cgltf_scene* scene;
+
+        cgltf_animation* animations;
+        cgltf_size animations_count;
+
+        cgltf_extras extras;
+
+        cgltf_size data_extensions_count;
+        cgltf_extension* data_extensions;
+
+        char** extensions_used;
+        cgltf_size extensions_used_count;
+
+        char** extensions_required;
+        cgltf_size extensions_required_count;
+
+        const char* json;
+        cgltf_size json_size;
+
+        const void* bin;
+        cgltf_size bin_size;
+
+        cgltf_memory_options memory;
+        cgltf_file_options file;
+} cgltf_data;
+
+cgltf_result cgltf_parse(
+                const cgltf_options* options,
+                const void* data,
+                cgltf_size size,
+                cgltf_data** out_data);
+
+cgltf_result cgltf_parse_file(
+                const cgltf_options* options,
+                const char* path,
+                cgltf_data** out_data);
+
+cgltf_result cgltf_load_buffers(
+                const cgltf_options* options,
+                cgltf_data* data,
+                const char* gltf_path);
+
+cgltf_result cgltf_load_buffer_base64(const cgltf_options* options, cgltf_size size, const char* base64, void** out_data);
+
+void cgltf_decode_uri(char* uri);
+
+cgltf_result cgltf_validate(cgltf_data* data);
+
+void cgltf_free(cgltf_data* data);
+
+void cgltf_node_transform_local(const cgltf_node* node, cgltf_float* out_matrix);
+void cgltf_node_transform_world(const cgltf_node* node, cgltf_float* out_matrix);
+
+cgltf_bool cgltf_accessor_read_float(const cgltf_accessor* accessor, cgltf_size index, cgltf_float* out, cgltf_size element_size);
+cgltf_bool cgltf_accessor_read_uint(const cgltf_accessor* accessor, cgltf_size index, cgltf_uint* out, cgltf_size element_size);
+cgltf_size cgltf_accessor_read_index(const cgltf_accessor* accessor, cgltf_size index);
+
+cgltf_size cgltf_num_components(cgltf_type type);
+
+cgltf_size cgltf_accessor_unpack_floats(const cgltf_accessor* accessor, cgltf_float* out, cgltf_size float_count);
+
+cgltf_result cgltf_copy_extras_json(const cgltf_data* data, const cgltf_extras* extras, char* dest, cgltf_size* dest_size);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* #ifndef CGLTF_H_INCLUDED__ */
+
+/*
+ *
+ * Stop now, if you are only interested in the API.
+ * Below, you find the implementation.
+ *
+ */
+
+#if defined(__INTELLISENSE__) || defined(__JETBRAINS_IDE__)
+/* This makes MSVC/CLion intellisense work. */
+#define CGLTF_IMPLEMENTATION
+#endif
+
+#ifdef CGLTF_IMPLEMENTATION
+
+#include <stdint.h> /* For uint8_t, uint32_t */
+#include <string.h> /* For strncpy */
+#include <stdio.h>  /* For fopen */
+#include <limits.h> /* For UINT_MAX etc */
+
+#if !defined(CGLTF_MALLOC) || !defined(CGLTF_FREE) || !defined(CGLTF_ATOI) || !defined(CGLTF_ATOF)
+#include <stdlib.h> /* For malloc, free, atoi, atof */
+#endif
+
+/* JSMN_PARENT_LINKS is necessary to make parsing large structures linear in input size */
+#define JSMN_PARENT_LINKS
+
+/* JSMN_STRICT is necessary to reject invalid JSON documents */
+#define JSMN_STRICT
+
+/*
+ * -- jsmn.h start --
+ * Source: https://github.com/zserge/jsmn
+ * License: MIT
+ */
+typedef enum {
+        JSMN_UNDEFINED = 0,
+        JSMN_OBJECT = 1,
+        JSMN_ARRAY = 2,
+        JSMN_STRING = 3,
+        JSMN_PRIMITIVE = 4
+} jsmntype_t;
+enum jsmnerr {
+        /* Not enough tokens were provided */
+        JSMN_ERROR_NOMEM = -1,
+        /* Invalid character inside JSON string */
+        JSMN_ERROR_INVAL = -2,
+        /* The string is not a full JSON packet, more bytes expected */
+        JSMN_ERROR_PART = -3
+};
+typedef struct {
+        jsmntype_t type;
+        int start;
+        int end;
+        int size;
+#ifdef JSMN_PARENT_LINKS
+        int parent;
+#endif
+} jsmntok_t;
+typedef struct {
+        unsigned int pos; /* offset in the JSON string */
+        unsigned int toknext; /* next token to allocate */
+        int toksuper; /* superior token node, e.g parent object or array */
+} jsmn_parser;
+static void jsmn_init(jsmn_parser *parser);
+static int jsmn_parse(jsmn_parser *parser, const char *js, size_t len, jsmntok_t *tokens, size_t num_tokens);
+/*
+ * -- jsmn.h end --
+ */
+
+
+static const cgltf_size GlbHeaderSize = 12;
+static const cgltf_size GlbChunkHeaderSize = 8;
+static const uint32_t GlbVersion = 2;
+static const uint32_t GlbMagic = 0x46546C67;
+static const uint32_t GlbMagicJsonChunk = 0x4E4F534A;
+static const uint32_t GlbMagicBinChunk = 0x004E4942;
+
+#ifndef CGLTF_MALLOC
+#define CGLTF_MALLOC(size) malloc(size)
+#endif
+#ifndef CGLTF_FREE
+#define CGLTF_FREE(ptr) free(ptr)
+#endif
+#ifndef CGLTF_ATOI
+#define CGLTF_ATOI(str) atoi(str)
+#endif
+#ifndef CGLTF_ATOF
+#define CGLTF_ATOF(str) atof(str)
+#endif
+
+static void* cgltf_default_alloc(void* user, cgltf_size size)
+{
+        (void)user;
+        return CGLTF_MALLOC(size);
+}
+
+static void cgltf_default_free(void* user, void* ptr)
+{
+        (void)user;
+        CGLTF_FREE(ptr);
+}
+
+static void* cgltf_calloc(cgltf_options* options, size_t element_size, cgltf_size count)
+{
+        if (SIZE_MAX / element_size < count)
+        {
+                return NULL;
+        }
+        void* result = options->memory.alloc(options->memory.user_data, element_size * count);
+        if (!result)
+        {
+                return NULL;
+        }
+        memset(result, 0, element_size * count);
+        return result;
+}
+
+static cgltf_result cgltf_default_file_read(const struct cgltf_memory_options* memory_options, const struct cgltf_file_options* file_options, const char* path, cgltf_size* size, void** data)
+{
+        (void)file_options;
+        void* (*memory_alloc)(void*, cgltf_size) = memory_options->alloc ? memory_options->alloc : &cgltf_default_alloc;
+        void (*memory_free)(void*, void*) = memory_options->free ? memory_options->free : &cgltf_default_free;
+
+        FILE* file = fopen(path, "rb");
+        if (!file)
+        {
+                return cgltf_result_file_not_found;
+        }
+
+        cgltf_size file_size = size ? *size : 0;
+
+        if (file_size == 0)
+        {
+                fseek(file, 0, SEEK_END);
+
+                long length = ftell(file);
+                if (length < 0)
+                {
+                        fclose(file);
+                        return cgltf_result_io_error;
+                }
+
+                fseek(file, 0, SEEK_SET);
+                file_size = (cgltf_size)length;
+        }
+
+        char* file_data = (char*)memory_alloc(memory_options->user_data, file_size);
+        if (!file_data)
+        {
+                fclose(file);
+                return cgltf_result_out_of_memory;
+        }
+        
+        cgltf_size read_size = fread(file_data, 1, file_size, file);
+
+        fclose(file);
+
+        if (read_size != file_size)
+        {
+                memory_free(memory_options->user_data, file_data);
+                return cgltf_result_io_error;
+        }
+
+        if (size)
+        {
+                *size = file_size;
+        }
+        if (data)
+        {
+                *data = file_data;
+        }
+
+        return cgltf_result_success;
+}
+
+static void cgltf_default_file_release(const struct cgltf_memory_options* memory_options, const struct cgltf_file_options* file_options, void* data)
+{
+        (void)file_options;
+        void (*memfree)(void*, void*) = memory_options->free ? memory_options->free : &cgltf_default_free;
+        memfree(memory_options->user_data, data);
+}
+
+static cgltf_result cgltf_parse_json(cgltf_options* options, const uint8_t* json_chunk, cgltf_size size, cgltf_data** out_data);
+
+cgltf_result cgltf_parse(const cgltf_options* options, const void* data, cgltf_size size, cgltf_data** out_data)
+{
+        if (size < GlbHeaderSize)
+        {
+                return cgltf_result_data_too_short;
+        }
+
+        if (options == NULL)
+        {
+                return cgltf_result_invalid_options;
+        }
+
+        cgltf_options fixed_options = *options;
+        if (fixed_options.memory.alloc == NULL)
+        {
+                fixed_options.memory.alloc = &cgltf_default_alloc;
+        }
+        if (fixed_options.memory.free == NULL)
+        {
+                fixed_options.memory.free = &cgltf_default_free;
+        }
+
+        uint32_t tmp;
+        // Magic
+        memcpy(&tmp, data, 4);
+        if (tmp != GlbMagic)
+        {
+                if (fixed_options.type == cgltf_file_type_invalid)
+                {
+                        fixed_options.type = cgltf_file_type_gltf;
+                }
+                else if (fixed_options.type == cgltf_file_type_glb)
+                {
+                        return cgltf_result_unknown_format;
+                }
+        }
+
+        if (fixed_options.type == cgltf_file_type_gltf)
+        {
+                cgltf_result json_result = cgltf_parse_json(&fixed_options, (const uint8_t*)data, size, out_data);
+                if (json_result != cgltf_result_success)
+                {
+                        return json_result;
+                }
+
+                (*out_data)->file_type = cgltf_file_type_gltf;
+
+                return cgltf_result_success;
+        }
+
+        const uint8_t* ptr = (const uint8_t*)data;
+        // Version
+        memcpy(&tmp, ptr + 4, 4);
+        uint32_t version = tmp;
+        if (version != GlbVersion)
+        {
+                return version < GlbVersion ? cgltf_result_legacy_gltf : cgltf_result_unknown_format;
+        }
+
+        // Total length
+        memcpy(&tmp, ptr + 8, 4);
+        if (tmp > size)
+        {
+                return cgltf_result_data_too_short;
+        }
+
+        const uint8_t* json_chunk = ptr + GlbHeaderSize;
+
+        if (GlbHeaderSize + GlbChunkHeaderSize > size)
+        {
+                return cgltf_result_data_too_short;
+        }
+
+        // JSON chunk: length
+        uint32_t json_length;
+        memcpy(&json_length, json_chunk, 4);
+        if (GlbHeaderSize + GlbChunkHeaderSize + json_length > size)
+        {
+                return cgltf_result_data_too_short;
+        }
+
+        // JSON chunk: magic
+        memcpy(&tmp, json_chunk + 4, 4);
+        if (tmp != GlbMagicJsonChunk)
+        {
+                return cgltf_result_unknown_format;
+        }
+
+        json_chunk += GlbChunkHeaderSize;
+
+        const void* bin = 0;
+        cgltf_size bin_size = 0;
+
+        if (GlbHeaderSize + GlbChunkHeaderSize + json_length + GlbChunkHeaderSize <= size)
+        {
+                // We can read another chunk
+                const uint8_t* bin_chunk = json_chunk + json_length;
+
+                // Bin chunk: length
+                uint32_t bin_length;
+                memcpy(&bin_length, bin_chunk, 4);
+                if (GlbHeaderSize + GlbChunkHeaderSize + json_length + GlbChunkHeaderSize + bin_length > size)
+                {
+                        return cgltf_result_data_too_short;
+                }
+
+                // Bin chunk: magic
+                memcpy(&tmp, bin_chunk + 4, 4);
+                if (tmp != GlbMagicBinChunk)
+                {
+                        return cgltf_result_unknown_format;
+                }
+
+                bin_chunk += GlbChunkHeaderSize;
+
+                bin = bin_chunk;
+                bin_size = bin_length;
+        }
+
+        cgltf_result json_result = cgltf_parse_json(&fixed_options, json_chunk, json_length, out_data);
+        if (json_result != cgltf_result_success)
+        {
+                return json_result;
+        }
+
+        (*out_data)->file_type = cgltf_file_type_glb;
+        (*out_data)->bin = bin;
+        (*out_data)->bin_size = bin_size;
+
+        return cgltf_result_success;
+}
+
+cgltf_result cgltf_parse_file(const cgltf_options* options, const char* path, cgltf_data** out_data)
+{
+        if (options == NULL)
+        {
+                return cgltf_result_invalid_options;
+        }
+
+        void (*memory_free)(void*, void*) = options->memory.free ? options->memory.free : &cgltf_default_free;
+        cgltf_result (*file_read)(const struct cgltf_memory_options*, const struct cgltf_file_options*, const char*, cgltf_size*, void**) = options->file.read ? options->file.read : &cgltf_default_file_read;
+
+        void* file_data = NULL;
+        cgltf_size file_size = 0;
+        cgltf_result result = file_read(&options->memory, &options->file, path, &file_size, &file_data);
+        if (result != cgltf_result_success)
+        {
+                return result;
+        }
+
+        result = cgltf_parse(options, file_data, file_size, out_data);
+
+        if (result != cgltf_result_success)
+        {
+                memory_free(options->memory.user_data, file_data);
+                return result;
+        }
+
+        (*out_data)->file_data = file_data;
+
+        return cgltf_result_success;
+}
+
+static void cgltf_combine_paths(char* path, const char* base, const char* uri)
+{
+        const char* s0 = strrchr(base, '/');
+        const char* s1 = strrchr(base, '\\');
+        const char* slash = s0 ? (s1 && s1 > s0 ? s1 : s0) : s1;
+
+        if (slash)
+        {
+                size_t prefix = slash - base + 1;
+
+                strncpy(path, base, prefix);
+                strcpy(path + prefix, uri);
+        }
+        else
+        {
+                strcpy(path, uri);
+        }
+}
+
+static cgltf_result cgltf_load_buffer_file(const cgltf_options* options, cgltf_size size, const char* uri, const char* gltf_path, void** out_data)
+{
+        void* (*memory_alloc)(void*, cgltf_size) = options->memory.alloc ? options->memory.alloc : &cgltf_default_alloc;
+        void (*memory_free)(void*, void*) = options->memory.free ? options->memory.free : &cgltf_default_free;
+        cgltf_result (*file_read)(const struct cgltf_memory_options*, const struct cgltf_file_options*, const char*, cgltf_size*, void**) = options->file.read ? options->file.read : &cgltf_default_file_read;
+
+        char* path = (char*)memory_alloc(options->memory.user_data, strlen(uri) + strlen(gltf_path) + 1);
+        if (!path)
+        {
+                return cgltf_result_out_of_memory;
+        }
+
+        cgltf_combine_paths(path, gltf_path, uri);
+
+        // after combining, the tail of the resulting path is a uri; decode_uri converts it into path
+        cgltf_decode_uri(path + strlen(path) - strlen(uri));
+
+        void* file_data = NULL;
+        cgltf_result result = file_read(&options->memory, &options->file, path, &size, &file_data);
+
+        memory_free(options->memory.user_data, path);
+
+        *out_data = (result == cgltf_result_success) ? file_data : NULL;
+
+        return result;
+}
+
+cgltf_result cgltf_load_buffer_base64(const cgltf_options* options, cgltf_size size, const char* base64, void** out_data)
+{
+        void* (*memory_alloc)(void*, cgltf_size) = options->memory.alloc ? options->memory.alloc : &cgltf_default_alloc;
+        void (*memory_free)(void*, void*) = options->memory.free ? options->memory.free : &cgltf_default_free;
+
+        unsigned char* data = (unsigned char*)memory_alloc(options->memory.user_data, size);
+        if (!data)
+        {
+                return cgltf_result_out_of_memory;
+        }
+
+        unsigned int buffer = 0;
+        unsigned int buffer_bits = 0;
+
+        for (cgltf_size i = 0; i < size; ++i)
+        {
+                while (buffer_bits < 8)
+                {
+                        char ch = *base64++;
+
+                        int index =
+                                (unsigned)(ch - 'A') < 26 ? (ch - 'A') :
+                                (unsigned)(ch - 'a') < 26 ? (ch - 'a') + 26 :
+                                (unsigned)(ch - '0') < 10 ? (ch - '0') + 52 :
+                                ch == '+' ? 62 :
+                                ch == '/' ? 63 :
+                                -1;
+
+                        if (index < 0)
+                        {
+                                memory_free(options->memory.user_data, data);
+                                return cgltf_result_io_error;
+                        }
+
+                        buffer = (buffer << 6) | index;
+                        buffer_bits += 6;
+                }
+
+                data[i] = (unsigned char)(buffer >> (buffer_bits - 8));
+                buffer_bits -= 8;
+        }
+
+        *out_data = data;
+
+        return cgltf_result_success;
+}
+
+static int cgltf_unhex(char ch)
+{
+        return
+                (unsigned)(ch - '0') < 10 ? (ch - '0') :
+                (unsigned)(ch - 'A') < 6 ? (ch - 'A') + 10 :
+                (unsigned)(ch - 'a') < 6 ? (ch - 'a') + 10 :
+                -1;
+}
+
+void cgltf_decode_uri(char* uri)
+{
+        char* write = uri;
+        char* i = uri;
+
+        while (*i)
+        {
+                if (*i == '%')
+                {
+                        int ch1 = cgltf_unhex(i[1]);
+
+                        if (ch1 >= 0)
+                        {
+                                int ch2 = cgltf_unhex(i[2]);
+
+                                if (ch2 >= 0)
+                                {
+                                        *write++ = (char)(ch1 * 16 + ch2);
+                                        i += 3;
+                                        continue;
+                                }
+                        }
+                }
+
+                *write++ = *i++;
+        }
+
+        *write = 0;
+}
+
+cgltf_result cgltf_load_buffers(const cgltf_options* options, cgltf_data* data, const char* gltf_path)
+{
+        if (options == NULL)
+        {
+                return cgltf_result_invalid_options;
+        }
+
+        if (data->buffers_count && data->buffers[0].data == NULL && data->buffers[0].uri == NULL && data->bin)
+        {
+                if (data->bin_size < data->buffers[0].size)
+                {
+                        return cgltf_result_data_too_short;
+                }
+
+                data->buffers[0].data = (void*)data->bin;
+        }
+
+        for (cgltf_size i = 0; i < data->buffers_count; ++i)
+        {
+                if (data->buffers[i].data)
+                {
+                        continue;
+                }
+
+                const char* uri = data->buffers[i].uri;
+
+                if (uri == NULL)
+                {
+                        continue;
+                }
+
+                if (strncmp(uri, "data:", 5) == 0)
+                {
+                        const char* comma = strchr(uri, ',');
+
+                        if (comma && comma - uri >= 7 && strncmp(comma - 7, ";base64", 7) == 0)
+                        {
+                                cgltf_result res = cgltf_load_buffer_base64(options, data->buffers[i].size, comma + 1, &data->buffers[i].data);
+
+                                if (res != cgltf_result_success)
+                                {
+                                        return res;
+                                }
+                        }
+                        else
+                        {
+                                return cgltf_result_unknown_format;
+                        }
+                }
+                else if (strstr(uri, "://") == NULL && gltf_path)
+                {
+                        cgltf_result res = cgltf_load_buffer_file(options, data->buffers[i].size, uri, gltf_path, &data->buffers[i].data);
+
+                        if (res != cgltf_result_success)
+                        {
+                                return res;
+                        }
+                }
+                else
+                {
+                        return cgltf_result_unknown_format;
+                }
+        }
+
+        return cgltf_result_success;
+}
+
+static cgltf_size cgltf_calc_size(cgltf_type type, cgltf_component_type component_type);
+
+static cgltf_size cgltf_calc_index_bound(cgltf_buffer_view* buffer_view, cgltf_size offset, cgltf_component_type component_type, cgltf_size count)
+{
+        char* data = (char*)buffer_view->buffer->data + offset + buffer_view->offset;
+        cgltf_size bound = 0;
+
+        switch (component_type)
+        {
+        case cgltf_component_type_r_8u:
+                for (size_t i = 0; i < count; ++i)
+                {
+                        cgltf_size v = ((unsigned char*)data)[i];
+                        bound = bound > v ? bound : v;
+                }
+                break;
+
+        case cgltf_component_type_r_16u:
+                for (size_t i = 0; i < count; ++i)
+                {
+                        cgltf_size v = ((unsigned short*)data)[i];
+                        bound = bound > v ? bound : v;
+                }
+                break;
+
+        case cgltf_component_type_r_32u:
+                for (size_t i = 0; i < count; ++i)
+                {
+                        cgltf_size v = ((unsigned int*)data)[i];
+                        bound = bound > v ? bound : v;
+                }
+                break;
+
+        default:
+                ;
+        }
+
+        return bound;
+}
+
+cgltf_result cgltf_validate(cgltf_data* data)
+{
+        for (cgltf_size i = 0; i < data->accessors_count; ++i)
+        {
+                cgltf_accessor* accessor = &data->accessors[i];
+
+                cgltf_size element_size = cgltf_calc_size(accessor->type, accessor->component_type);
+
+                if (accessor->buffer_view)
+                {
+                        cgltf_size req_size = accessor->offset + accessor->stride * (accessor->count - 1) + element_size;
+
+                        if (accessor->buffer_view->size < req_size)
+                        {
+                                return cgltf_result_data_too_short;
+                        }
+                }
+
+                if (accessor->is_sparse)
+                {
+                        cgltf_accessor_sparse* sparse = &accessor->sparse;
+
+                        cgltf_size indices_component_size = cgltf_calc_size(cgltf_type_scalar, sparse->indices_component_type);
+                        cgltf_size indices_req_size = sparse->indices_byte_offset + indices_component_size * sparse->count;
+                        cgltf_size values_req_size = sparse->values_byte_offset + element_size * sparse->count;
+
+                        if (sparse->indices_buffer_view->size < indices_req_size ||
+                                sparse->values_buffer_view->size < values_req_size)
+                        {
+                                return cgltf_result_data_too_short;
+                        }
+
+                        if (sparse->indices_component_type != cgltf_component_type_r_8u &&
+                                sparse->indices_component_type != cgltf_component_type_r_16u &&
+                                sparse->indices_component_type != cgltf_component_type_r_32u)
+                        {
+                                return cgltf_result_invalid_gltf;
+                        }
+
+                        if (sparse->indices_buffer_view->buffer->data)
+                        {
+                                cgltf_size index_bound = cgltf_calc_index_bound(sparse->indices_buffer_view, sparse->indices_byte_offset, sparse->indices_component_type, sparse->count);
+
+                                if (index_bound >= accessor->count)
+                                {
+                                        return cgltf_result_data_too_short;
+                                }
+                        }
+                }
+        }
+
+        for (cgltf_size i = 0; i < data->buffer_views_count; ++i)
+        {
+                cgltf_size req_size = data->buffer_views[i].offset + data->buffer_views[i].size;
+
+                if (data->buffer_views[i].buffer && data->buffer_views[i].buffer->size < req_size)
+                {
+                        return cgltf_result_data_too_short;
+                }
+        }
+
+        for (cgltf_size i = 0; i < data->meshes_count; ++i)
+        {
+                if (data->meshes[i].weights)
+                {
+                        if (data->meshes[i].primitives_count && data->meshes[i].primitives[0].targets_count != data->meshes[i].weights_count)
+                        {
+                                return cgltf_result_invalid_gltf;
+                        }
+                }
+
+                if (data->meshes[i].target_names)
+                {
+                        if (data->meshes[i].primitives_count && data->meshes[i].primitives[0].targets_count != data->meshes[i].target_names_count)
+                        {
+                                return cgltf_result_invalid_gltf;
+                        }
+                }
+
+                for (cgltf_size j = 0; j < data->meshes[i].primitives_count; ++j)
+                {
+                        if (data->meshes[i].primitives[j].targets_count != data->meshes[i].primitives[0].targets_count)
+                        {
+                                return cgltf_result_invalid_gltf;
+                        }
+
+                        if (data->meshes[i].primitives[j].attributes_count)
+                        {
+                                cgltf_accessor* first = data->meshes[i].primitives[j].attributes[0].data;
+
+                                for (cgltf_size k = 0; k < data->meshes[i].primitives[j].attributes_count; ++k)
+                                {
+                                        if (data->meshes[i].primitives[j].attributes[k].data->count != first->count)
+                                        {
+                                                return cgltf_result_invalid_gltf;
+                                        }
+                                }
+
+                                for (cgltf_size k = 0; k < data->meshes[i].primitives[j].targets_count; ++k)
+                                {
+                                        for (cgltf_size m = 0; m < data->meshes[i].primitives[j].targets[k].attributes_count; ++m)
+                                        {
+                                                if (data->meshes[i].primitives[j].targets[k].attributes[m].data->count != first->count)
+                                                {
+                                                        return cgltf_result_invalid_gltf;
+                                                }
+                                        }
+                                }
+
+                                cgltf_accessor* indices = data->meshes[i].primitives[j].indices;
+
+                                if (indices &&
+                                        indices->component_type != cgltf_component_type_r_8u &&
+                                        indices->component_type != cgltf_component_type_r_16u &&
+                                        indices->component_type != cgltf_component_type_r_32u)
+                                {
+                                        return cgltf_result_invalid_gltf;
+                                }
+
+                                if (indices && indices->buffer_view && indices->buffer_view->buffer->data)
+                                {
+                                        cgltf_size index_bound = cgltf_calc_index_bound(indices->buffer_view, indices->offset, indices->component_type, indices->count);
+
+                                        if (index_bound >= first->count)
+                                        {
+                                                return cgltf_result_data_too_short;
+                                        }
+                                }
+                        }
+                }
+        }
+
+        for (cgltf_size i = 0; i < data->nodes_count; ++i)
+        {
+                if (data->nodes[i].weights && data->nodes[i].mesh)
+                {
+                        if (data->nodes[i].mesh->primitives_count && data->nodes[i].mesh->primitives[0].targets_count != data->nodes[i].weights_count)
+                        {
+                                return cgltf_result_invalid_gltf;
+                        }
+                }
+        }
+
+        for (cgltf_size i = 0; i < data->nodes_count; ++i)
+        {
+                cgltf_node* p1 = data->nodes[i].parent;
+                cgltf_node* p2 = p1 ? p1->parent : NULL;
+
+                while (p1 && p2)
+                {
+                        if (p1 == p2)
+                        {
+                                return cgltf_result_invalid_gltf;
+                        }
+
+                        p1 = p1->parent;
+                        p2 = p2->parent ? p2->parent->parent : NULL;
+                }
+        }
+
+        for (cgltf_size i = 0; i < data->scenes_count; ++i)
+        {
+                for (cgltf_size j = 0; j < data->scenes[i].nodes_count; ++j)
+                {
+                        if (data->scenes[i].nodes[j]->parent)
+                        {
+                                return cgltf_result_invalid_gltf;
+                        }
+                }
+        }
+
+        for (cgltf_size i = 0; i < data->animations_count; ++i)
+        {
+                for (cgltf_size j = 0; j < data->animations[i].channels_count; ++j)
+                {
+                        cgltf_animation_channel* channel = &data->animations[i].channels[j];
+
+                        if (!channel->target_node)
+                        {
+                                continue;
+                        }
+
+                        cgltf_size components = 1;
+
+                        if (channel->target_path == cgltf_animation_path_type_weights)
+                        {
+                                if (!channel->target_node->mesh || !channel->target_node->mesh->primitives_count)
+                                {
+                                        return cgltf_result_invalid_gltf;
+                                }
+
+                                components = channel->target_node->mesh->primitives[0].targets_count;
+                        }
+
+                        cgltf_size values = channel->sampler->interpolation == cgltf_interpolation_type_cubic_spline ? 3 : 1;
+
+                        if (channel->sampler->input->count * components * values != channel->sampler->output->count)
+                        {
+                                return cgltf_result_data_too_short;
+                        }
+                }
+        }
+
+        return cgltf_result_success;
+}
+
+cgltf_result cgltf_copy_extras_json(const cgltf_data* data, const cgltf_extras* extras, char* dest, cgltf_size* dest_size)
+{
+        cgltf_size json_size = extras->end_offset - extras->start_offset;
+
+        if (!dest)
+        {
+                if (dest_size)
+                {
+                        *dest_size = json_size + 1;
+                        return cgltf_result_success;
+                }
+                return cgltf_result_invalid_options;
+        }
+
+        if (*dest_size + 1 < json_size)
+        {
+                strncpy(dest, data->json + extras->start_offset, *dest_size - 1);
+                dest[*dest_size - 1] = 0;
+        }
+        else
+        {
+                strncpy(dest, data->json + extras->start_offset, json_size);
+                dest[json_size] = 0;
+        }
+
+        return cgltf_result_success;
+}
+
+void cgltf_free_extensions(cgltf_data* data, cgltf_extension* extensions, cgltf_size extensions_count)
+{
+        for (cgltf_size i = 0; i < extensions_count; ++i)
+        {
+                data->memory.free(data->memory.user_data, extensions[i].name);
+                data->memory.free(data->memory.user_data, extensions[i].data);
+        }
+        data->memory.free(data->memory.user_data, extensions);
+}
+
+void cgltf_free(cgltf_data* data)
+{
+        if (!data)
+        {
+                return;
+        }
+
+        void (*file_release)(const struct cgltf_memory_options*, const struct cgltf_file_options*, void* data) = data->file.release ? data->file.release : cgltf_default_file_release;
+
+        data->memory.free(data->memory.user_data, data->asset.copyright);
+        data->memory.free(data->memory.user_data, data->asset.generator);
+        data->memory.free(data->memory.user_data, data->asset.version);
+        data->memory.free(data->memory.user_data, data->asset.min_version);
+
+        cgltf_free_extensions(data, data->asset.extensions, data->asset.extensions_count);
+
+        for (cgltf_size i = 0; i < data->accessors_count; ++i)
+        {
+                if(data->accessors[i].is_sparse)
+                {
+                        cgltf_free_extensions(data, data->accessors[i].sparse.extensions, data->accessors[i].sparse.extensions_count);
+                        cgltf_free_extensions(data, data->accessors[i].sparse.indices_extensions, data->accessors[i].sparse.indices_extensions_count);
+                        cgltf_free_extensions(data, data->accessors[i].sparse.values_extensions, data->accessors[i].sparse.values_extensions_count);
+                }
+                cgltf_free_extensions(data, data->accessors[i].extensions, data->accessors[i].extensions_count);
+        }
+        data->memory.free(data->memory.user_data, data->accessors);
+
+        for (cgltf_size i = 0; i < data->buffer_views_count; ++i)
+        {
+                cgltf_free_extensions(data, data->buffer_views[i].extensions, data->buffer_views[i].extensions_count);
+        }
+        data->memory.free(data->memory.user_data, data->buffer_views);
+
+        for (cgltf_size i = 0; i < data->buffers_count; ++i)
+        {
+                if (data->buffers[i].data != data->bin)
+                {
+                        file_release(&data->memory, &data->file, data->buffers[i].data);
+                }
+                data->memory.free(data->memory.user_data, data->buffers[i].uri);
+
+                cgltf_free_extensions(data, data->buffers[i].extensions, data->buffers[i].extensions_count);
+        }
+
+        data->memory.free(data->memory.user_data, data->buffers);
+
+        for (cgltf_size i = 0; i < data->meshes_count; ++i)
+        {
+                data->memory.free(data->memory.user_data, data->meshes[i].name);
+
+                for (cgltf_size j = 0; j < data->meshes[i].primitives_count; ++j)
+                {
+                        for (cgltf_size k = 0; k < data->meshes[i].primitives[j].attributes_count; ++k)
+                        {
+                                data->memory.free(data->memory.user_data, data->meshes[i].primitives[j].attributes[k].name);
+                        }
+
+                        data->memory.free(data->memory.user_data, data->meshes[i].primitives[j].attributes);
+
+                        for (cgltf_size k = 0; k < data->meshes[i].primitives[j].targets_count; ++k)
+                        {
+                                for (cgltf_size m = 0; m < data->meshes[i].primitives[j].targets[k].attributes_count; ++m)
+                                {
+                                        data->memory.free(data->memory.user_data, data->meshes[i].primitives[j].targets[k].attributes[m].name);
+                                }
+
+                                data->memory.free(data->memory.user_data, data->meshes[i].primitives[j].targets[k].attributes);
+                        }
+
+                        data->memory.free(data->memory.user_data, data->meshes[i].primitives[j].targets);
+
+                        if (data->meshes[i].primitives[j].has_draco_mesh_compression)
+                        {
+                                for (cgltf_size k = 0; k < data->meshes[i].primitives[j].draco_mesh_compression.attributes_count; ++k)
+                                {
+                                        data->memory.free(data->memory.user_data, data->meshes[i].primitives[j].draco_mesh_compression.attributes[k].name);
+                                }
+
+                                data->memory.free(data->memory.user_data, data->meshes[i].primitives[j].draco_mesh_compression.attributes);
+                        }
+
+                        cgltf_free_extensions(data, data->meshes[i].primitives[j].extensions, data->meshes[i].primitives[j].extensions_count);
+                }
+
+                data->memory.free(data->memory.user_data, data->meshes[i].primitives);
+                data->memory.free(data->memory.user_data, data->meshes[i].weights);
+
+                for (cgltf_size j = 0; j < data->meshes[i].target_names_count; ++j)
+                {
+                        data->memory.free(data->memory.user_data, data->meshes[i].target_names[j]);
+                }
+
+                cgltf_free_extensions(data, data->meshes[i].extensions, data->meshes[i].extensions_count);
+
+                data->memory.free(data->memory.user_data, data->meshes[i].target_names);
+        }
+
+        data->memory.free(data->memory.user_data, data->meshes);
+
+        for (cgltf_size i = 0; i < data->materials_count; ++i)
+        {
+                data->memory.free(data->memory.user_data, data->materials[i].name);
+
+                if(data->materials[i].has_pbr_metallic_roughness)
+                {
+                        cgltf_free_extensions(data, data->materials[i].pbr_metallic_roughness.metallic_roughness_texture.extensions, data->materials[i].pbr_metallic_roughness.metallic_roughness_texture.extensions_count);
+                        cgltf_free_extensions(data, data->materials[i].pbr_metallic_roughness.base_color_texture.extensions, data->materials[i].pbr_metallic_roughness.base_color_texture.extensions_count);
+                }
+                if(data->materials[i].has_pbr_specular_glossiness)
+                {
+                        cgltf_free_extensions(data, data->materials[i].pbr_specular_glossiness.diffuse_texture.extensions, data->materials[i].pbr_specular_glossiness.diffuse_texture.extensions_count);
+                        cgltf_free_extensions(data, data->materials[i].pbr_specular_glossiness.specular_glossiness_texture.extensions, data->materials[i].pbr_specular_glossiness.specular_glossiness_texture.extensions_count);
+                }
+                if(data->materials[i].has_clearcoat)
+                {
+                        cgltf_free_extensions(data, data->materials[i].clearcoat.clearcoat_texture.extensions, data->materials[i].clearcoat.clearcoat_texture.extensions_count);
+                        cgltf_free_extensions(data, data->materials[i].clearcoat.clearcoat_roughness_texture.extensions, data->materials[i].clearcoat.clearcoat_roughness_texture.extensions_count);
+                        cgltf_free_extensions(data, data->materials[i].clearcoat.clearcoat_normal_texture.extensions, data->materials[i].clearcoat.clearcoat_normal_texture.extensions_count);
+                }
+                if(data->materials[i].has_specular)
+                {
+                        cgltf_free_extensions(data, data->materials[i].specular.specular_texture.extensions, data->materials[i].specular.specular_texture.extensions_count);
+                }
+                if(data->materials[i].has_transmission)
+                {
+                        cgltf_free_extensions(data, data->materials[i].transmission.transmission_texture.extensions, data->materials[i].transmission.transmission_texture.extensions_count);
+                }
+
+                cgltf_free_extensions(data, data->materials[i].normal_texture.extensions, data->materials[i].normal_texture.extensions_count);
+                cgltf_free_extensions(data, data->materials[i].occlusion_texture.extensions, data->materials[i].occlusion_texture.extensions_count);
+                cgltf_free_extensions(data, data->materials[i].emissive_texture.extensions, data->materials[i].emissive_texture.extensions_count);
+
+                cgltf_free_extensions(data, data->materials[i].extensions, data->materials[i].extensions_count);
+        }
+
+        data->memory.free(data->memory.user_data, data->materials);
+
+        for (cgltf_size i = 0; i < data->images_count; ++i) 
+        {
+                data->memory.free(data->memory.user_data, data->images[i].name);
+                data->memory.free(data->memory.user_data, data->images[i].uri);
+                data->memory.free(data->memory.user_data, data->images[i].mime_type);
+
+                cgltf_free_extensions(data, data->images[i].extensions, data->images[i].extensions_count);
+        }
+
+        data->memory.free(data->memory.user_data, data->images);
+
+        for (cgltf_size i = 0; i < data->textures_count; ++i)
+        {
+                data->memory.free(data->memory.user_data, data->textures[i].name);
+                cgltf_free_extensions(data, data->textures[i].extensions, data->textures[i].extensions_count);
+        }
+
+        data->memory.free(data->memory.user_data, data->textures);
+
+        for (cgltf_size i = 0; i < data->samplers_count; ++i)
+        {
+                cgltf_free_extensions(data, data->samplers[i].extensions, data->samplers[i].extensions_count);
+        }
+
+        data->memory.free(data->memory.user_data, data->samplers);
+
+        for (cgltf_size i = 0; i < data->skins_count; ++i)
+        {
+                data->memory.free(data->memory.user_data, data->skins[i].name);
+                data->memory.free(data->memory.user_data, data->skins[i].joints);
+
+                cgltf_free_extensions(data, data->skins[i].extensions, data->skins[i].extensions_count);
+        }
+
+        data->memory.free(data->memory.user_data, data->skins);
+
+        for (cgltf_size i = 0; i < data->cameras_count; ++i)
+        {
+                data->memory.free(data->memory.user_data, data->cameras[i].name);
+                cgltf_free_extensions(data, data->cameras[i].extensions, data->cameras[i].extensions_count);
+        }
+
+        data->memory.free(data->memory.user_data, data->cameras);
+
+        for (cgltf_size i = 0; i < data->lights_count; ++i)
+        {
+                data->memory.free(data->memory.user_data, data->lights[i].name);
+        }
+
+        data->memory.free(data->memory.user_data, data->lights);
+
+        for (cgltf_size i = 0; i < data->nodes_count; ++i)
+        {
+                data->memory.free(data->memory.user_data, data->nodes[i].name);
+                data->memory.free(data->memory.user_data, data->nodes[i].children);
+                data->memory.free(data->memory.user_data, data->nodes[i].weights);
+                cgltf_free_extensions(data, data->nodes[i].extensions, data->nodes[i].extensions_count);
+        }
+
+        data->memory.free(data->memory.user_data, data->nodes);
+
+        for (cgltf_size i = 0; i < data->scenes_count; ++i)
+        {
+                data->memory.free(data->memory.user_data, data->scenes[i].name);
+                data->memory.free(data->memory.user_data, data->scenes[i].nodes);
+
+                cgltf_free_extensions(data, data->scenes[i].extensions, data->scenes[i].extensions_count);
+        }
+
+        data->memory.free(data->memory.user_data, data->scenes);
+
+        for (cgltf_size i = 0; i < data->animations_count; ++i)
+        {
+                data->memory.free(data->memory.user_data, data->animations[i].name);
+                for (cgltf_size j = 0; j <  data->animations[i].samplers_count; ++j)
+                {
+                        cgltf_free_extensions(data, data->animations[i].samplers[j].extensions, data->animations[i].samplers[j].extensions_count);
+                }
+                data->memory.free(data->memory.user_data, data->animations[i].samplers);
+
+                for (cgltf_size j = 0; j <  data->animations[i].channels_count; ++j)
+                {
+                        cgltf_free_extensions(data, data->animations[i].channels[j].extensions, data->animations[i].channels[j].extensions_count);
+                }
+                data->memory.free(data->memory.user_data, data->animations[i].channels);
+
+                cgltf_free_extensions(data, data->animations[i].extensions, data->animations[i].extensions_count);
+        }
+
+        data->memory.free(data->memory.user_data, data->animations);
+
+        cgltf_free_extensions(data, data->data_extensions, data->data_extensions_count);
+
+        for (cgltf_size i = 0; i < data->extensions_used_count; ++i)
+        {
+                data->memory.free(data->memory.user_data, data->extensions_used[i]);
+        }
+
+        data->memory.free(data->memory.user_data, data->extensions_used);
+
+        for (cgltf_size i = 0; i < data->extensions_required_count; ++i)
+        {
+                data->memory.free(data->memory.user_data, data->extensions_required[i]);
+        }
+
+        data->memory.free(data->memory.user_data, data->extensions_required);
+
+        file_release(&data->memory, &data->file, data->file_data);
+
+        data->memory.free(data->memory.user_data, data);
+}
+
+void cgltf_node_transform_local(const cgltf_node* node, cgltf_float* out_matrix)
+{
+        cgltf_float* lm = out_matrix;
+
+        if (node->has_matrix)
+        {
+                memcpy(lm, node->matrix, sizeof(float) * 16);
+        }
+        else
+        {
+                float tx = node->translation[0];
+                float ty = node->translation[1];
+                float tz = node->translation[2];
+
+                float qx = node->rotation[0];
+                float qy = node->rotation[1];
+                float qz = node->rotation[2];
+                float qw = node->rotation[3];
+
+                float sx = node->scale[0];
+                float sy = node->scale[1];
+                float sz = node->scale[2];
+
+                lm[0] = (1 - 2 * qy*qy - 2 * qz*qz) * sx;
+                lm[1] = (2 * qx*qy + 2 * qz*qw) * sx;
+                lm[2] = (2 * qx*qz - 2 * qy*qw) * sx;
+                lm[3] = 0.f;
+
+                lm[4] = (2 * qx*qy - 2 * qz*qw) * sy;
+                lm[5] = (1 - 2 * qx*qx - 2 * qz*qz) * sy;
+                lm[6] = (2 * qy*qz + 2 * qx*qw) * sy;
+                lm[7] = 0.f;
+
+                lm[8] = (2 * qx*qz + 2 * qy*qw) * sz;
+                lm[9] = (2 * qy*qz - 2 * qx*qw) * sz;
+                lm[10] = (1 - 2 * qx*qx - 2 * qy*qy) * sz;
+                lm[11] = 0.f;
+
+                lm[12] = tx;
+                lm[13] = ty;
+                lm[14] = tz;
+                lm[15] = 1.f;
+        }
+}
+
+void cgltf_node_transform_world(const cgltf_node* node, cgltf_float* out_matrix)
+{
+        cgltf_float* lm = out_matrix;
+        cgltf_node_transform_local(node, lm);
+
+        const cgltf_node* parent = node->parent;
+
+        while (parent)
+        {
+                float pm[16];
+                cgltf_node_transform_local(parent, pm);
+
+                for (int i = 0; i < 4; ++i)
+                {
+                        float l0 = lm[i * 4 + 0];
+                        float l1 = lm[i * 4 + 1];
+                        float l2 = lm[i * 4 + 2];
+
+                        float r0 = l0 * pm[0] + l1 * pm[4] + l2 * pm[8];
+                        float r1 = l0 * pm[1] + l1 * pm[5] + l2 * pm[9];
+                        float r2 = l0 * pm[2] + l1 * pm[6] + l2 * pm[10];
+
+                        lm[i * 4 + 0] = r0;
+                        lm[i * 4 + 1] = r1;
+                        lm[i * 4 + 2] = r2;
+                }
+
+                lm[12] += pm[12];
+                lm[13] += pm[13];
+                lm[14] += pm[14];
+
+                parent = parent->parent;
+        }
+}
+
+static cgltf_size cgltf_component_read_index(const void* in, cgltf_component_type component_type)
+{
+        switch (component_type)
+        {
+                case cgltf_component_type_r_16:
+                        return *((const int16_t*) in);
+                case cgltf_component_type_r_16u:
+                        return *((const uint16_t*) in);
+                case cgltf_component_type_r_32u:
+                        return *((const uint32_t*) in);
+                case cgltf_component_type_r_32f:
+                        return (cgltf_size)*((const float*) in);
+                case cgltf_component_type_r_8:
+                        return *((const int8_t*) in);
+                case cgltf_component_type_r_8u:
+                        return *((const uint8_t*) in);
+                default:
+                        return 0;
+        }
+}
+
+static cgltf_float cgltf_component_read_float(const void* in, cgltf_component_type component_type, cgltf_bool normalized)
+{
+        if (component_type == cgltf_component_type_r_32f)
+        {
+                return *((const float*) in);
+        }
+
+        if (normalized)
+        {
+                switch (component_type)
+                {
+                        // note: glTF spec doesn't currently define normalized conversions for 32-bit integers
+                        case cgltf_component_type_r_16:
+                                return *((const int16_t*) in) / (cgltf_float)32767;
+                        case cgltf_component_type_r_16u:
+                                return *((const uint16_t*) in) / (cgltf_float)65535;
+                        case cgltf_component_type_r_8:
+                                return *((const int8_t*) in) / (cgltf_float)127;
+                        case cgltf_component_type_r_8u:
+                                return *((const uint8_t*) in) / (cgltf_float)255;
+                        default:
+                                return 0;
+                }
+        }
+
+        return (cgltf_float)cgltf_component_read_index(in, component_type);
+}
+
+static cgltf_size cgltf_component_size(cgltf_component_type component_type);
+
+static cgltf_bool cgltf_element_read_float(const uint8_t* element, cgltf_type type, cgltf_component_type component_type, cgltf_bool normalized, cgltf_float* out, cgltf_size element_size)
+{
+        cgltf_size num_components = cgltf_num_components(type);
+
+        if (element_size < num_components) {
+                return 0;
+        }
+
+        // There are three special cases for component extraction, see #data-alignment in the 2.0 spec.
+
+        cgltf_size component_size = cgltf_component_size(component_type);
+
+        if (type == cgltf_type_mat2 && component_size == 1)
+        {
+                out[0] = cgltf_component_read_float(element, component_type, normalized);
+                out[1] = cgltf_component_read_float(element + 1, component_type, normalized);
+                out[2] = cgltf_component_read_float(element + 4, component_type, normalized);
+                out[3] = cgltf_component_read_float(element + 5, component_type, normalized);
+                return 1;
+        }
+
+        if (type == cgltf_type_mat3 && component_size == 1)
+        {
+                out[0] = cgltf_component_read_float(element, component_type, normalized);
+                out[1] = cgltf_component_read_float(element + 1, component_type, normalized);
+                out[2] = cgltf_component_read_float(element + 2, component_type, normalized);
+                out[3] = cgltf_component_read_float(element + 4, component_type, normalized);
+                out[4] = cgltf_component_read_float(element + 5, component_type, normalized);
+                out[5] = cgltf_component_read_float(element + 6, component_type, normalized);
+                out[6] = cgltf_component_read_float(element + 8, component_type, normalized);
+                out[7] = cgltf_component_read_float(element + 9, component_type, normalized);
+                out[8] = cgltf_component_read_float(element + 10, component_type, normalized);
+                return 1;
+        }
+
+        if (type == cgltf_type_mat3 && component_size == 2)
+        {
+                out[0] = cgltf_component_read_float(element, component_type, normalized);
+                out[1] = cgltf_component_read_float(element + 2, component_type, normalized);
+                out[2] = cgltf_component_read_float(element + 4, component_type, normalized);
+                out[3] = cgltf_component_read_float(element + 8, component_type, normalized);
+                out[4] = cgltf_component_read_float(element + 10, component_type, normalized);
+                out[5] = cgltf_component_read_float(element + 12, component_type, normalized);
+                out[6] = cgltf_component_read_float(element + 16, component_type, normalized);
+                out[7] = cgltf_component_read_float(element + 18, component_type, normalized);
+                out[8] = cgltf_component_read_float(element + 20, component_type, normalized);
+                return 1;
+        }
+
+        for (cgltf_size i = 0; i < num_components; ++i)
+        {
+                out[i] = cgltf_component_read_float(element + component_size * i, component_type, normalized);
+        }
+        return 1;
+}
+
+cgltf_bool cgltf_accessor_read_float(const cgltf_accessor* accessor, cgltf_size index, cgltf_float* out, cgltf_size element_size)
+{
+        if (accessor->is_sparse)
+        {
+                return 0;
+        }
+        if (accessor->buffer_view == NULL)
+        {
+                memset(out, 0, element_size * sizeof(cgltf_float));
+                return 1;
+        }
+        if (accessor->buffer_view->buffer->data == NULL)
+        {
+                return 0;
+        }
+        cgltf_size offset = accessor->offset + accessor->buffer_view->offset;
+        const uint8_t* element = (const uint8_t*) accessor->buffer_view->buffer->data;
+        element += offset + accessor->stride * index;
+        return cgltf_element_read_float(element, accessor->type, accessor->component_type, accessor->normalized, out, element_size);
+}
+
+cgltf_size cgltf_accessor_unpack_floats(const cgltf_accessor* accessor, cgltf_float* out, cgltf_size float_count)
+{
+        cgltf_size floats_per_element = cgltf_num_components(accessor->type);
+        cgltf_size available_floats = accessor->count * floats_per_element;
+        if (out == NULL)
+        {
+                return available_floats;
+        }
+
+        float_count = available_floats < float_count ? available_floats : float_count;
+        cgltf_size element_count = float_count / floats_per_element;
+
+        // First pass: convert each element in the base accessor.
+        cgltf_float* dest = out;
+        cgltf_accessor dense = *accessor;
+        dense.is_sparse = 0;
+        for (cgltf_size index = 0; index < element_count; index++, dest += floats_per_element)
+        {
+                if (!cgltf_accessor_read_float(&dense, index, dest, floats_per_element))
+                {
+                        return 0;
+                }
+        }
+
+        // Second pass: write out each element in the sparse accessor.
+        if (accessor->is_sparse)
+        {
+                const cgltf_accessor_sparse* sparse = &dense.sparse;
+
+                if (sparse->indices_buffer_view->buffer->data == NULL || sparse->values_buffer_view->buffer->data == NULL)
+                {
+                        return 0;
+                }
+
+                const uint8_t* index_data = (const uint8_t*) sparse->indices_buffer_view->buffer->data;
+                index_data += sparse->indices_byte_offset + sparse->indices_buffer_view->offset;
+                cgltf_size index_stride = cgltf_component_size(sparse->indices_component_type);
+                const uint8_t* reader_head = (const uint8_t*) sparse->values_buffer_view->buffer->data;
+                reader_head += sparse->values_byte_offset + sparse->values_buffer_view->offset;
+                for (cgltf_size reader_index = 0; reader_index < sparse->count; reader_index++, index_data += index_stride)
+                {
+                        size_t writer_index = cgltf_component_read_index(index_data, sparse->indices_component_type);
+                        float* writer_head = out + writer_index * floats_per_element;
+
+                        if (!cgltf_element_read_float(reader_head, dense.type, dense.component_type, dense.normalized, writer_head, floats_per_element))
+                        {
+                                return 0;
+                        }
+
+                        reader_head += dense.stride;
+                }
+        }
+
+        return element_count * floats_per_element;
+}
+
+static cgltf_uint cgltf_component_read_uint(const void* in, cgltf_component_type component_type)
+{
+        switch (component_type)
+        {
+                case cgltf_component_type_r_8:
+                        return *((const int8_t*) in);
+
+                case cgltf_component_type_r_8u:
+                        return *((const uint8_t*) in);
+
+                case cgltf_component_type_r_16:
+                        return *((const int16_t*) in);
+
+                case cgltf_component_type_r_16u:
+                        return *((const uint16_t*) in);
+
+                case cgltf_component_type_r_32u:
+                        return *((const uint32_t*) in);
+
+                default:
+                        return 0;
+        }
+}
+
+static cgltf_bool cgltf_element_read_uint(const uint8_t* element, cgltf_type type, cgltf_component_type component_type, cgltf_uint* out, cgltf_size element_size)
+{
+    cgltf_size num_components = cgltf_num_components(type);
+
+    if (element_size < num_components)
+    {
+        return 0;
+    }
+
+        // Reading integer matrices is not a valid use case
+    if (type == cgltf_type_mat2 || type == cgltf_type_mat3 || type == cgltf_type_mat4)
+    {
+        return 0;
+    }
+
+    cgltf_size component_size = cgltf_component_size(component_type);
+
+    for (cgltf_size i = 0; i < num_components; ++i)
+    {
+        out[i] = cgltf_component_read_uint(element + component_size * i, component_type);
+    }
+    return 1;
+}
+
+cgltf_bool cgltf_accessor_read_uint(const cgltf_accessor* accessor, cgltf_size index, cgltf_uint* out, cgltf_size element_size)
+{
+    if (accessor->is_sparse)
+    {
+        return 0;
+    }
+    if (accessor->buffer_view == NULL)
+    {
+        memset(out, 0, element_size * sizeof( cgltf_uint ));
+        return 1;
+    }
+    if (accessor->buffer_view->buffer->data == NULL)
+    {
+        return 0;
+    }
+    cgltf_size offset = accessor->offset + accessor->buffer_view->offset;
+    const uint8_t* element = (const uint8_t*) accessor->buffer_view->buffer->data;
+    element += offset + accessor->stride * index;
+    return cgltf_element_read_uint(element, accessor->type, accessor->component_type, out, element_size);
+}
+
+cgltf_size cgltf_accessor_read_index(const cgltf_accessor* accessor, cgltf_size index)
+{
+        if (accessor->is_sparse)
+        {
+                return 0; // This is an error case, but we can't communicate the error with existing interface.
+        }
+        if (accessor->buffer_view == NULL)
+        {
+                return 0;
+        }
+        if (accessor->buffer_view->buffer->data == NULL)
+        {
+                return 0; // This is an error case, but we can't communicate the error with existing interface.
+        }
+
+        cgltf_size offset = accessor->offset + accessor->buffer_view->offset;
+        const uint8_t* element = (const uint8_t*) accessor->buffer_view->buffer->data;
+        element += offset + accessor->stride * index;
+        return cgltf_component_read_index(element, accessor->component_type);
+}
+
+#define CGLTF_ERROR_JSON -1
+#define CGLTF_ERROR_NOMEM -2
+#define CGLTF_ERROR_LEGACY -3
+
+#define CGLTF_CHECK_TOKTYPE(tok_, type_) if ((tok_).type != (type_)) { return CGLTF_ERROR_JSON; }
+#define CGLTF_CHECK_KEY(tok_) if ((tok_).type != JSMN_STRING || (tok_).size == 0) { return CGLTF_ERROR_JSON; } /* checking size for 0 verifies that a value follows the key */
+
+#define CGLTF_PTRINDEX(type, idx) (type*)((cgltf_size)idx + 1)
+#define CGLTF_PTRFIXUP(var, data, size) if (var) { if ((cgltf_size)var > size) { return CGLTF_ERROR_JSON; } var = &data[(cgltf_size)var-1]; }
+#define CGLTF_PTRFIXUP_REQ(var, data, size) if (!var || (cgltf_size)var > size) { return CGLTF_ERROR_JSON; } var = &data[(cgltf_size)var-1];
+
+static int cgltf_json_strcmp(jsmntok_t const* tok, const uint8_t* json_chunk, const char* str)
+{
+        CGLTF_CHECK_TOKTYPE(*tok, JSMN_STRING);
+        size_t const str_len = strlen(str);
+        size_t const name_length = tok->end - tok->start;
+        return (str_len == name_length) ? strncmp((const char*)json_chunk + tok->start, str, str_len) : 128;
+}
+
+static int cgltf_json_to_int(jsmntok_t const* tok, const uint8_t* json_chunk)
+{
+        CGLTF_CHECK_TOKTYPE(*tok, JSMN_PRIMITIVE);
+        char tmp[128];
+        int size = (cgltf_size)(tok->end - tok->start) < sizeof(tmp) ? tok->end - tok->start : (int)(sizeof(tmp) - 1);
+        strncpy(tmp, (const char*)json_chunk + tok->start, size);
+        tmp[size] = 0;
+        return CGLTF_ATOI(tmp);
+}
+
+static cgltf_float cgltf_json_to_float(jsmntok_t const* tok, const uint8_t* json_chunk)
+{
+        CGLTF_CHECK_TOKTYPE(*tok, JSMN_PRIMITIVE);
+        char tmp[128];
+        int size = (cgltf_size)(tok->end - tok->start) < sizeof(tmp) ? tok->end - tok->start : (int)(sizeof(tmp) - 1);
+        strncpy(tmp, (const char*)json_chunk + tok->start, size);
+        tmp[size] = 0;
+        return (cgltf_float)CGLTF_ATOF(tmp);
+}
+
+static cgltf_bool cgltf_json_to_bool(jsmntok_t const* tok, const uint8_t* json_chunk)
+{
+        int size = tok->end - tok->start;
+        return size == 4 && memcmp(json_chunk + tok->start, "true", 4) == 0;
+}
+
+static int cgltf_skip_json(jsmntok_t const* tokens, int i)
+{
+        int end = i + 1;
+
+        while (i < end)
+        {
+                switch (tokens[i].type)
+                {
+                case JSMN_OBJECT:
+                        end += tokens[i].size * 2;
+                        break;
+
+                case JSMN_ARRAY:
+                        end += tokens[i].size;
+                        break;
+
+                case JSMN_PRIMITIVE:
+                case JSMN_STRING:
+                        break;
+
+                default:
+                        return -1;
+                }
+
+                i++;
+        }
+
+        return i;
+}
+
+static void cgltf_fill_float_array(float* out_array, int size, float value)
+{
+        for (int j = 0; j < size; ++j)
+        {
+                out_array[j] = value;
+        }
+}
+
+static int cgltf_parse_json_float_array(jsmntok_t const* tokens, int i, const uint8_t* json_chunk, float* out_array, int size)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_ARRAY);
+        if (tokens[i].size != size)
+        {
+                return CGLTF_ERROR_JSON;
+        }
+        ++i;
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_PRIMITIVE);
+                out_array[j] = cgltf_json_to_float(tokens + i, json_chunk);
+                ++i;
+        }
+        return i;
+}
+
+static int cgltf_parse_json_string(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, char** out_string)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_STRING);
+        if (*out_string)
+        {
+                return CGLTF_ERROR_JSON;
+        }
+        int size = tokens[i].end - tokens[i].start;
+        char* result = (char*)options->memory.alloc(options->memory.user_data, size + 1);
+        if (!result)
+        {
+                return CGLTF_ERROR_NOMEM;
+        }
+        strncpy(result, (const char*)json_chunk + tokens[i].start, size);
+        result[size] = 0;
+        *out_string = result;
+        return i + 1;
+}
+
+static int cgltf_parse_json_array(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, size_t element_size, void** out_array, cgltf_size* out_size)
+{
+        (void)json_chunk;
+        if (tokens[i].type != JSMN_ARRAY)
+        {
+                return tokens[i].type == JSMN_OBJECT ? CGLTF_ERROR_LEGACY : CGLTF_ERROR_JSON;
+        }
+        if (*out_array)
+        {
+                return CGLTF_ERROR_JSON;
+        }
+        int size = tokens[i].size;
+        void* result = cgltf_calloc(options, element_size, size);
+        if (!result)
+        {
+                return CGLTF_ERROR_NOMEM;
+        }
+        *out_array = result;
+        *out_size = size;
+        return i + 1;
+}
+
+static int cgltf_parse_json_string_array(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, char*** out_array, cgltf_size* out_size)
+{
+    CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_ARRAY);
+    i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(char*), (void**)out_array, out_size);
+    if (i < 0)
+    {
+        return i;
+    }
+
+    for (cgltf_size j = 0; j < *out_size; ++j)
+    {
+        i = cgltf_parse_json_string(options, tokens, i, json_chunk, j + (*out_array));
+        if (i < 0)
+        {
+            return i;
+        }
+    }
+    return i;
+}
+
+static void cgltf_parse_attribute_type(const char* name, cgltf_attribute_type* out_type, int* out_index)
+{
+        const char* us = strchr(name, '_');
+        size_t len = us ? (size_t)(us - name) : strlen(name);
+
+        if (len == 8 && strncmp(name, "POSITION", 8) == 0)
+        {
+                *out_type = cgltf_attribute_type_position;
+        }
+        else if (len == 6 && strncmp(name, "NORMAL", 6) == 0)
+        {
+                *out_type = cgltf_attribute_type_normal;
+        }
+        else if (len == 7 && strncmp(name, "TANGENT", 7) == 0)
+        {
+                *out_type = cgltf_attribute_type_tangent;
+        }
+        else if (len == 8 && strncmp(name, "TEXCOORD", 8) == 0)
+        {
+                *out_type = cgltf_attribute_type_texcoord;
+        }
+        else if (len == 5 && strncmp(name, "COLOR", 5) == 0)
+        {
+                *out_type = cgltf_attribute_type_color;
+        }
+        else if (len == 6 && strncmp(name, "JOINTS", 6) == 0)
+        {
+                *out_type = cgltf_attribute_type_joints;
+        }
+        else if (len == 7 && strncmp(name, "WEIGHTS", 7) == 0)
+        {
+                *out_type = cgltf_attribute_type_weights;
+        }
+        else
+        {
+                *out_type = cgltf_attribute_type_invalid;
+        }
+
+        if (us && *out_type != cgltf_attribute_type_invalid)
+        {
+                *out_index = CGLTF_ATOI(us + 1);
+        }
+}
+
+static int cgltf_parse_json_attribute_list(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_attribute** out_attributes, cgltf_size* out_attributes_count)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        if (*out_attributes)
+        {
+                return CGLTF_ERROR_JSON;
+        }
+
+        *out_attributes_count = tokens[i].size;
+        *out_attributes = (cgltf_attribute*)cgltf_calloc(options, sizeof(cgltf_attribute), *out_attributes_count);
+        ++i;
+
+        if (!*out_attributes)
+        {
+                return CGLTF_ERROR_NOMEM;
+        }
+
+        for (cgltf_size j = 0; j < *out_attributes_count; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                i = cgltf_parse_json_string(options, tokens, i, json_chunk, &(*out_attributes)[j].name);
+                if (i < 0)
+                {
+                        return CGLTF_ERROR_JSON;
+                }
+
+                cgltf_parse_attribute_type((*out_attributes)[j].name, &(*out_attributes)[j].type, &(*out_attributes)[j].index);
+
+                (*out_attributes)[j].data = CGLTF_PTRINDEX(cgltf_accessor, cgltf_json_to_int(tokens + i, json_chunk));
+                ++i;
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_extras(jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_extras* out_extras)
+{
+        (void)json_chunk;
+        out_extras->start_offset = tokens[i].start;
+        out_extras->end_offset = tokens[i].end;
+        i = cgltf_skip_json(tokens, i);
+        return i;
+}
+
+static int cgltf_parse_json_unprocessed_extension(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_extension* out_extension)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_STRING);
+        CGLTF_CHECK_TOKTYPE(tokens[i+1], JSMN_OBJECT);
+        if (out_extension->name)
+        {
+                return CGLTF_ERROR_JSON;
+        }
+
+        cgltf_size name_length = tokens[i].end - tokens[i].start;
+        out_extension->name = (char*)options->memory.alloc(options->memory.user_data, name_length + 1);
+        if (!out_extension->name)
+        {
+                return CGLTF_ERROR_NOMEM;
+        }
+        strncpy(out_extension->name, (const char*)json_chunk + tokens[i].start, name_length);
+        out_extension->name[name_length] = 0;
+        i++;
+
+        size_t start = tokens[i].start;
+        size_t size = tokens[i].end - start;
+        out_extension->data = (char*)options->memory.alloc(options->memory.user_data, size + 1);
+        if (!out_extension->data)
+        {
+                return CGLTF_ERROR_NOMEM;
+        }
+        strncpy(out_extension->data, (const char*)json_chunk + start, size);
+        out_extension->data[size] = '\0';
+
+        i = cgltf_skip_json(tokens, i);
+
+        return i;
+}
+
+static int cgltf_parse_json_unprocessed_extensions(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_size* out_extensions_count, cgltf_extension** out_extensions)
+{
+        ++i;
+
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+        if(*out_extensions)
+        {
+                return CGLTF_ERROR_JSON;
+        }
+
+        int extensions_size = tokens[i].size;
+        *out_extensions_count = 0;
+        *out_extensions = (cgltf_extension*)cgltf_calloc(options, sizeof(cgltf_extension), extensions_size);
+
+        if (!*out_extensions)
+        {
+                return CGLTF_ERROR_NOMEM;
+        }
+
+        ++i;
+
+        for (int j = 0; j < extensions_size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                cgltf_size extension_index = (*out_extensions_count)++;
+                cgltf_extension* extension = &((*out_extensions)[extension_index]);
+                i = cgltf_parse_json_unprocessed_extension(options, tokens, i, json_chunk, extension);
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+        return i;
+}
+
+static int cgltf_parse_json_draco_mesh_compression(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_draco_mesh_compression* out_draco_mesh_compression)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens + i, json_chunk, "attributes") == 0)
+                {
+                        i = cgltf_parse_json_attribute_list(options, tokens, i + 1, json_chunk, &out_draco_mesh_compression->attributes, &out_draco_mesh_compression->attributes_count);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "bufferView") == 0)
+                {
+                        ++i;
+                        out_draco_mesh_compression->buffer_view = CGLTF_PTRINDEX(cgltf_buffer_view, cgltf_json_to_int(tokens + i, json_chunk));
+                        ++i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_primitive(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_primitive* out_prim)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        out_prim->type = cgltf_primitive_type_triangles;
+
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens+i, json_chunk, "mode") == 0)
+                {
+                        ++i;
+                        out_prim->type
+                                        = (cgltf_primitive_type)
+                                        cgltf_json_to_int(tokens+i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "indices") == 0)
+                {
+                        ++i;
+                        out_prim->indices = CGLTF_PTRINDEX(cgltf_accessor, cgltf_json_to_int(tokens + i, json_chunk));
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "material") == 0)
+                {
+                        ++i;
+                        out_prim->material = CGLTF_PTRINDEX(cgltf_material, cgltf_json_to_int(tokens + i, json_chunk));
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "attributes") == 0)
+                {
+                        i = cgltf_parse_json_attribute_list(options, tokens, i + 1, json_chunk, &out_prim->attributes, &out_prim->attributes_count);
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "targets") == 0)
+                {
+                        i = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_morph_target), (void**)&out_prim->targets, &out_prim->targets_count);
+                        if (i < 0)
+                        {
+                                return i;
+                        }
+
+                        for (cgltf_size k = 0; k < out_prim->targets_count; ++k)
+                        {
+                                i = cgltf_parse_json_attribute_list(options, tokens, i, json_chunk, &out_prim->targets[k].attributes, &out_prim->targets[k].attributes_count);
+                                if (i < 0)
+                                {
+                                        return i;
+                                }
+                        }
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
+                {
+                        i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_prim->extras);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
+                {
+                        ++i;
+
+                        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+                        if(out_prim->extensions)
+                        {
+                                return CGLTF_ERROR_JSON;
+                        }
+
+                        int extensions_size = tokens[i].size;
+                        out_prim->extensions_count = 0;
+                        out_prim->extensions = (cgltf_extension*)cgltf_calloc(options, sizeof(cgltf_extension), extensions_size);
+
+                        if (!out_prim->extensions)
+                        {
+                                return CGLTF_ERROR_NOMEM;
+                        }
+
+                        ++i;
+                        for (int k = 0; k < extensions_size; ++k)
+                        {
+                                CGLTF_CHECK_KEY(tokens[i]);
+
+                                if (cgltf_json_strcmp(tokens+i, json_chunk, "KHR_draco_mesh_compression") == 0)
+                                {
+                                        out_prim->has_draco_mesh_compression = 1;
+                                        i = cgltf_parse_json_draco_mesh_compression(options, tokens, i + 1, json_chunk, &out_prim->draco_mesh_compression);
+                                }
+                                else
+                                {
+                                        i = cgltf_parse_json_unprocessed_extension(options, tokens, i, json_chunk, &(out_prim->extensions[out_prim->extensions_count++]));
+                                }
+
+                                if (i < 0)
+                                {
+                                        return i;
+                                }
+                        }
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i+1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_mesh(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_mesh* out_mesh)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens+i, json_chunk, "name") == 0)
+                {
+                        i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_mesh->name);
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "primitives") == 0)
+                {
+                        i = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_primitive), (void**)&out_mesh->primitives, &out_mesh->primitives_count);
+                        if (i < 0)
+                        {
+                                return i;
+                        }
+
+                        for (cgltf_size prim_index = 0; prim_index < out_mesh->primitives_count; ++prim_index)
+                        {
+                                i = cgltf_parse_json_primitive(options, tokens, i, json_chunk, &out_mesh->primitives[prim_index]);
+                                if (i < 0)
+                                {
+                                        return i;
+                                }
+                        }
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "weights") == 0)
+                {
+                        i = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_float), (void**)&out_mesh->weights, &out_mesh->weights_count);
+                        if (i < 0)
+                        {
+                                return i;
+                        }
+
+                        i = cgltf_parse_json_float_array(tokens, i - 1, json_chunk, out_mesh->weights, (int)out_mesh->weights_count);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
+                {
+                        ++i;
+
+                        out_mesh->extras.start_offset = tokens[i].start;
+                        out_mesh->extras.end_offset = tokens[i].end;
+
+                        if (tokens[i].type == JSMN_OBJECT)
+                        {
+                                int extras_size = tokens[i].size;
+                                ++i;
+
+                                for (int k = 0; k < extras_size; ++k)
+                                {
+                                        CGLTF_CHECK_KEY(tokens[i]);
+
+                                        if (cgltf_json_strcmp(tokens+i, json_chunk, "targetNames") == 0)
+                                        {
+                                                i = cgltf_parse_json_string_array(options, tokens, i + 1, json_chunk, &out_mesh->target_names, &out_mesh->target_names_count);
+                                        }
+                                        else
+                                        {
+                                                i = cgltf_skip_json(tokens, i+1);
+                                        }
+
+                                        if (i < 0)
+                                        {
+                                                return i;
+                                        }
+                                }
+                        }
+                        else
+                        {
+                                i = cgltf_skip_json(tokens, i);
+                        }
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
+                {
+                        i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_mesh->extensions_count, &out_mesh->extensions);
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i+1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_meshes(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
+{
+        i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_mesh), (void**)&out_data->meshes, &out_data->meshes_count);
+        if (i < 0)
+        {
+                return i;
+        }
+
+        for (cgltf_size j = 0; j < out_data->meshes_count; ++j)
+        {
+                i = cgltf_parse_json_mesh(options, tokens, i, json_chunk, &out_data->meshes[j]);
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+        return i;
+}
+
+static cgltf_component_type cgltf_json_to_component_type(jsmntok_t const* tok, const uint8_t* json_chunk)
+{
+        int type = cgltf_json_to_int(tok, json_chunk);
+
+        switch (type)
+        {
+        case 5120:
+                return cgltf_component_type_r_8;
+        case 5121:
+                return cgltf_component_type_r_8u;
+        case 5122:
+                return cgltf_component_type_r_16;
+        case 5123:
+                return cgltf_component_type_r_16u;
+        case 5125:
+                return cgltf_component_type_r_32u;
+        case 5126:
+                return cgltf_component_type_r_32f;
+        default:
+                return cgltf_component_type_invalid;
+        }
+}
+
+static int cgltf_parse_json_accessor_sparse(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_accessor_sparse* out_sparse)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens+i, json_chunk, "count") == 0)
+                {
+                        ++i;
+                        out_sparse->count = cgltf_json_to_int(tokens + i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "indices") == 0)
+                {
+                        ++i;
+                        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+                        int indices_size = tokens[i].size;
+                        ++i;
+
+                        for (int k = 0; k < indices_size; ++k)
+                        {
+                                CGLTF_CHECK_KEY(tokens[i]);
+
+                                if (cgltf_json_strcmp(tokens+i, json_chunk, "bufferView") == 0)
+                                {
+                                        ++i;
+                                        out_sparse->indices_buffer_view = CGLTF_PTRINDEX(cgltf_buffer_view, cgltf_json_to_int(tokens + i, json_chunk));
+                                        ++i;
+                                }
+                                else if (cgltf_json_strcmp(tokens+i, json_chunk, "byteOffset") == 0)
+                                {
+                                        ++i;
+                                        out_sparse->indices_byte_offset = cgltf_json_to_int(tokens + i, json_chunk);
+                                        ++i;
+                                }
+                                else if (cgltf_json_strcmp(tokens+i, json_chunk, "componentType") == 0)
+                                {
+                                        ++i;
+                                        out_sparse->indices_component_type = cgltf_json_to_component_type(tokens + i, json_chunk);
+                                        ++i;
+                                }
+                                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
+                                {
+                                        i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_sparse->indices_extras);
+                                }
+                                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
+                                {
+                                        i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_sparse->indices_extensions_count, &out_sparse->indices_extensions);
+                                }
+                                else
+                                {
+                                        i = cgltf_skip_json(tokens, i+1);
+                                }
+
+                                if (i < 0)
+                                {
+                                        return i;
+                                }
+                        }
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "values") == 0)
+                {
+                        ++i;
+                        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+                        int values_size = tokens[i].size;
+                        ++i;
+
+                        for (int k = 0; k < values_size; ++k)
+                        {
+                                CGLTF_CHECK_KEY(tokens[i]);
+
+                                if (cgltf_json_strcmp(tokens+i, json_chunk, "bufferView") == 0)
+                                {
+                                        ++i;
+                                        out_sparse->values_buffer_view = CGLTF_PTRINDEX(cgltf_buffer_view, cgltf_json_to_int(tokens + i, json_chunk));
+                                        ++i;
+                                }
+                                else if (cgltf_json_strcmp(tokens+i, json_chunk, "byteOffset") == 0)
+                                {
+                                        ++i;
+                                        out_sparse->values_byte_offset = cgltf_json_to_int(tokens + i, json_chunk);
+                                        ++i;
+                                }
+                                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
+                                {
+                                        i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_sparse->values_extras);
+                                }
+                                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
+                                {
+                                        i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_sparse->values_extensions_count, &out_sparse->values_extensions);
+                                }
+                                else
+                                {
+                                        i = cgltf_skip_json(tokens, i+1);
+                                }
+
+                                if (i < 0)
+                                {
+                                        return i;
+                                }
+                        }
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
+                {
+                        i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_sparse->extras);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
+                {
+                        i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_sparse->extensions_count, &out_sparse->extensions);
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i+1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_accessor(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_accessor* out_accessor)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens+i, json_chunk, "bufferView") == 0)
+                {
+                        ++i;
+                        out_accessor->buffer_view = CGLTF_PTRINDEX(cgltf_buffer_view, cgltf_json_to_int(tokens + i, json_chunk));
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "byteOffset") == 0)
+                {
+                        ++i;
+                        out_accessor->offset =
+                                        cgltf_json_to_int(tokens+i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "componentType") == 0)
+                {
+                        ++i;
+                        out_accessor->component_type = cgltf_json_to_component_type(tokens + i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "normalized") == 0)
+                {
+                        ++i;
+                        out_accessor->normalized = cgltf_json_to_bool(tokens+i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "count") == 0)
+                {
+                        ++i;
+                        out_accessor->count =
+                                        cgltf_json_to_int(tokens+i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "type") == 0)
+                {
+                        ++i;
+                        if (cgltf_json_strcmp(tokens+i, json_chunk, "SCALAR") == 0)
+                        {
+                                out_accessor->type = cgltf_type_scalar;
+                        }
+                        else if (cgltf_json_strcmp(tokens+i, json_chunk, "VEC2") == 0)
+                        {
+                                out_accessor->type = cgltf_type_vec2;
+                        }
+                        else if (cgltf_json_strcmp(tokens+i, json_chunk, "VEC3") == 0)
+                        {
+                                out_accessor->type = cgltf_type_vec3;
+                        }
+                        else if (cgltf_json_strcmp(tokens+i, json_chunk, "VEC4") == 0)
+                        {
+                                out_accessor->type = cgltf_type_vec4;
+                        }
+                        else if (cgltf_json_strcmp(tokens+i, json_chunk, "MAT2") == 0)
+                        {
+                                out_accessor->type = cgltf_type_mat2;
+                        }
+                        else if (cgltf_json_strcmp(tokens+i, json_chunk, "MAT3") == 0)
+                        {
+                                out_accessor->type = cgltf_type_mat3;
+                        }
+                        else if (cgltf_json_strcmp(tokens+i, json_chunk, "MAT4") == 0)
+                        {
+                                out_accessor->type = cgltf_type_mat4;
+                        }
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "min") == 0)
+                {
+                        ++i;
+                        out_accessor->has_min = 1;
+                        // note: we can't parse the precise number of elements since type may not have been computed yet
+                        int min_size = tokens[i].size > 16 ? 16 : tokens[i].size;
+                        i = cgltf_parse_json_float_array(tokens, i, json_chunk, out_accessor->min, min_size);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "max") == 0)
+                {
+                        ++i;
+                        out_accessor->has_max = 1;
+                        // note: we can't parse the precise number of elements since type may not have been computed yet
+                        int max_size = tokens[i].size > 16 ? 16 : tokens[i].size;
+                        i = cgltf_parse_json_float_array(tokens, i, json_chunk, out_accessor->max, max_size);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "sparse") == 0)
+                {
+                        out_accessor->is_sparse = 1;
+                        i = cgltf_parse_json_accessor_sparse(options, tokens, i + 1, json_chunk, &out_accessor->sparse);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
+                {
+                        i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_accessor->extras);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
+                {
+                        i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_accessor->extensions_count, &out_accessor->extensions);
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i+1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_texture_transform(jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_texture_transform* out_texture_transform)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens + i, json_chunk, "offset") == 0)
+                {
+                        i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_texture_transform->offset, 2);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "rotation") == 0)
+                {
+                        ++i;
+                        out_texture_transform->rotation = cgltf_json_to_float(tokens + i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "scale") == 0)
+                {
+                        i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_texture_transform->scale, 2);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "texCoord") == 0)
+                {
+                        ++i;
+                        out_texture_transform->texcoord = cgltf_json_to_int(tokens + i, json_chunk);
+                        ++i;
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i + 1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_texture_view(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_texture_view* out_texture_view)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        out_texture_view->scale = 1.0f;
+        cgltf_fill_float_array(out_texture_view->transform.scale, 2, 1.0f);
+
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens + i, json_chunk, "index") == 0)
+                {
+                        ++i;
+                        out_texture_view->texture = CGLTF_PTRINDEX(cgltf_texture, cgltf_json_to_int(tokens + i, json_chunk));
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "texCoord") == 0)
+                {
+                        ++i;
+                        out_texture_view->texcoord = cgltf_json_to_int(tokens + i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "scale") == 0) 
+                {
+                        ++i;
+                        out_texture_view->scale = cgltf_json_to_float(tokens + i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "strength") == 0)
+                {
+                        ++i;
+                        out_texture_view->scale = cgltf_json_to_float(tokens + i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
+                {
+                        i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_texture_view->extras);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
+                {
+                        ++i;
+
+                        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+                        if(out_texture_view->extensions)
+                        {
+                                return CGLTF_ERROR_JSON;
+                        }
+
+                        int extensions_size = tokens[i].size;
+                        out_texture_view->extensions_count = 0;
+                        out_texture_view->extensions = (cgltf_extension*)cgltf_calloc(options, sizeof(cgltf_extension), extensions_size);
+
+                        if (!out_texture_view->extensions)
+                        {
+                                return CGLTF_ERROR_NOMEM;
+                        }
+
+                        ++i;
+
+                        for (int k = 0; k < extensions_size; ++k)
+                        {
+                                CGLTF_CHECK_KEY(tokens[i]);
+
+                                if (cgltf_json_strcmp(tokens+i, json_chunk, "KHR_texture_transform") == 0)
+                                {
+                                        out_texture_view->has_transform = 1;
+                                        i = cgltf_parse_json_texture_transform(tokens, i + 1, json_chunk, &out_texture_view->transform);
+                                }
+                                else
+                                {
+                                        i = cgltf_parse_json_unprocessed_extension(options, tokens, i, json_chunk, &(out_texture_view->extensions[out_texture_view->extensions_count++]));
+                                }
+
+                                if (i < 0)
+                                {
+                                        return i;
+                                }
+                        }
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i + 1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_pbr_metallic_roughness(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_pbr_metallic_roughness* out_pbr)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens+i, json_chunk, "metallicFactor") == 0)
+                {
+                        ++i;
+                        out_pbr->metallic_factor = 
+                                cgltf_json_to_float(tokens + i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "roughnessFactor") == 0) 
+                {
+                        ++i;
+                        out_pbr->roughness_factor =
+                                cgltf_json_to_float(tokens+i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "baseColorFactor") == 0)
+                {
+                        i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_pbr->base_color_factor, 4);
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "baseColorTexture") == 0)
+                {
+                        i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk,
+                                &out_pbr->base_color_texture);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "metallicRoughnessTexture") == 0)
+                {
+                        i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk,
+                                &out_pbr->metallic_roughness_texture);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
+                {
+                        i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_pbr->extras);
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i+1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_pbr_specular_glossiness(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_pbr_specular_glossiness* out_pbr)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens+i, json_chunk, "diffuseFactor") == 0)
+                {
+                        i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_pbr->diffuse_factor, 4);
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "specularFactor") == 0)
+                {
+                        i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_pbr->specular_factor, 3);
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "glossinessFactor") == 0)
+                {
+                        ++i;
+                        out_pbr->glossiness_factor = cgltf_json_to_float(tokens + i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "diffuseTexture") == 0)
+                {
+                        i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_pbr->diffuse_texture);
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "specularGlossinessTexture") == 0)
+                {
+                        i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_pbr->specular_glossiness_texture);
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i+1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_clearcoat(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_clearcoat* out_clearcoat)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens+i, json_chunk, "clearcoatFactor") == 0)
+                {
+                        ++i;
+                        out_clearcoat->clearcoat_factor = cgltf_json_to_float(tokens + i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "clearcoatRoughnessFactor") == 0)
+                {
+                        ++i;
+                        out_clearcoat->clearcoat_roughness_factor = cgltf_json_to_float(tokens + i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "clearcoatTexture") == 0)
+                {
+                        i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_clearcoat->clearcoat_texture);
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "clearcoatRoughnessTexture") == 0)
+                {
+                        i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_clearcoat->clearcoat_roughness_texture);
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "clearcoatNormalTexture") == 0)
+                {
+                        i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_clearcoat->clearcoat_normal_texture);
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i+1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_ior(jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_ior* out_ior)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+        int size = tokens[i].size;
+        ++i;
+
+        // Default values
+        out_ior->ior = 1.5f;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens+i, json_chunk, "ior") == 0)
+                {
+                        ++i;
+                        out_ior->ior = cgltf_json_to_float(tokens + i, json_chunk);
+                        ++i;
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i+1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_specular(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_specular* out_specular)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+        int size = tokens[i].size;
+        ++i;
+
+        // Default values
+        out_specular->specular_factor = 1.0f;
+        cgltf_fill_float_array(out_specular->specular_color_factor, 3, 1.0f);
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens+i, json_chunk, "specularFactor") == 0)
+                {
+                        ++i;
+                        out_specular->specular_factor = cgltf_json_to_float(tokens + i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "specularColorFactor") == 0)
+                {
+                        i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_specular->specular_color_factor, 3);
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "specularTexture") == 0)
+                {
+                        i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_specular->specular_texture);
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i+1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_transmission(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_transmission* out_transmission)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens+i, json_chunk, "transmissionFactor") == 0)
+                {
+                        ++i;
+                        out_transmission->transmission_factor = cgltf_json_to_float(tokens + i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "transmissionTexture") == 0)
+                {
+                        i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_transmission->transmission_texture);
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i+1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_image(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_image* out_image)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j) 
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens + i, json_chunk, "uri") == 0) 
+                {
+                        i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_image->uri);
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "bufferView") == 0)
+                {
+                        ++i;
+                        out_image->buffer_view = CGLTF_PTRINDEX(cgltf_buffer_view, cgltf_json_to_int(tokens + i, json_chunk));
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "mimeType") == 0)
+                {
+                        i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_image->mime_type);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "name") == 0)
+                {
+                        i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_image->name);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
+                {
+                        i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_image->extras);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
+                {
+                        i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_image->extensions_count, &out_image->extensions);
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i + 1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_sampler(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_sampler* out_sampler)
+{
+        (void)options;
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        out_sampler->wrap_s = 10497;
+        out_sampler->wrap_t = 10497;
+
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens + i, json_chunk, "magFilter") == 0) 
+                {
+                        ++i;
+                        out_sampler->mag_filter
+                                = cgltf_json_to_int(tokens + i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "minFilter") == 0)
+                {
+                        ++i;
+                        out_sampler->min_filter
+                                = cgltf_json_to_int(tokens + i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "wrapS") == 0)
+                {
+                        ++i;
+                        out_sampler->wrap_s
+                                = cgltf_json_to_int(tokens + i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "wrapT") == 0) 
+                {
+                        ++i;
+                        out_sampler->wrap_t
+                                = cgltf_json_to_int(tokens + i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
+                {
+                        i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_sampler->extras);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
+                {
+                        i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_sampler->extensions_count, &out_sampler->extensions);
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i + 1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_texture(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_texture* out_texture)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens+i, json_chunk, "name") == 0)
+                {
+                        i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_texture->name);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "sampler") == 0)
+                {
+                        ++i;
+                        out_texture->sampler = CGLTF_PTRINDEX(cgltf_sampler, cgltf_json_to_int(tokens + i, json_chunk));
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "source") == 0) 
+                {
+                        ++i;
+                        out_texture->image = CGLTF_PTRINDEX(cgltf_image, cgltf_json_to_int(tokens + i, json_chunk));
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
+                {
+                        i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_texture->extras);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
+                {
+                        i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_texture->extensions_count, &out_texture->extensions);
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i + 1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_material(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_material* out_material)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        cgltf_fill_float_array(out_material->pbr_metallic_roughness.base_color_factor, 4, 1.0f);
+        out_material->pbr_metallic_roughness.metallic_factor = 1.0f;
+        out_material->pbr_metallic_roughness.roughness_factor = 1.0f;
+
+        cgltf_fill_float_array(out_material->pbr_specular_glossiness.diffuse_factor, 4, 1.0f);
+        cgltf_fill_float_array(out_material->pbr_specular_glossiness.specular_factor, 3, 1.0f);
+        out_material->pbr_specular_glossiness.glossiness_factor = 1.0f;
+
+        out_material->alpha_cutoff = 0.5f;
+
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens+i, json_chunk, "name") == 0)
+                {
+                        i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_material->name);
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "pbrMetallicRoughness") == 0)
+                {
+                        out_material->has_pbr_metallic_roughness = 1;
+                        i = cgltf_parse_json_pbr_metallic_roughness(options, tokens, i + 1, json_chunk, &out_material->pbr_metallic_roughness);
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "emissiveFactor") == 0)
+                {
+                        i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_material->emissive_factor, 3);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "normalTexture") == 0)
+                {
+                        i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk,
+                                &out_material->normal_texture);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "occlusionTexture") == 0)
+                {
+                        i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk,
+                                &out_material->occlusion_texture);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "emissiveTexture") == 0)
+                {
+                        i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk,
+                                &out_material->emissive_texture);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "alphaMode") == 0)
+                {
+                        ++i;
+                        if (cgltf_json_strcmp(tokens + i, json_chunk, "OPAQUE") == 0)
+                        {
+                                out_material->alpha_mode = cgltf_alpha_mode_opaque;
+                        }
+                        else if (cgltf_json_strcmp(tokens + i, json_chunk, "MASK") == 0)
+                        {
+                                out_material->alpha_mode = cgltf_alpha_mode_mask;
+                        }
+                        else if (cgltf_json_strcmp(tokens + i, json_chunk, "BLEND") == 0)
+                        {
+                                out_material->alpha_mode = cgltf_alpha_mode_blend;
+                        }
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "alphaCutoff") == 0)
+                {
+                        ++i;
+                        out_material->alpha_cutoff = cgltf_json_to_float(tokens + i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "doubleSided") == 0)
+                {
+                        ++i;
+                        out_material->double_sided =
+                                cgltf_json_to_bool(tokens + i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
+                {
+                        i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_material->extras);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
+                {
+                        ++i;
+
+                        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+                        if(out_material->extensions)
+                        {
+                                return CGLTF_ERROR_JSON;
+                        }
+
+                        int extensions_size = tokens[i].size;
+                        ++i;
+                        out_material->extensions = (cgltf_extension*)cgltf_calloc(options, sizeof(cgltf_extension), extensions_size);
+                        out_material->extensions_count= 0;
+
+                        if (!out_material->extensions)
+                        {
+                                return CGLTF_ERROR_NOMEM;
+                        }
+
+                        for (int k = 0; k < extensions_size; ++k)
+                        {
+                                CGLTF_CHECK_KEY(tokens[i]);
+
+                                if (cgltf_json_strcmp(tokens+i, json_chunk, "KHR_materials_pbrSpecularGlossiness") == 0)
+                                {
+                                        out_material->has_pbr_specular_glossiness = 1;
+                                        i = cgltf_parse_json_pbr_specular_glossiness(options, tokens, i + 1, json_chunk, &out_material->pbr_specular_glossiness);
+                                }
+                                else if (cgltf_json_strcmp(tokens+i, json_chunk, "KHR_materials_unlit") == 0)
+                                {
+                                        out_material->unlit = 1;
+                                        i = cgltf_skip_json(tokens, i+1);
+                                }
+                                else if (cgltf_json_strcmp(tokens+i, json_chunk, "KHR_materials_clearcoat") == 0)
+                                {
+                                        out_material->has_clearcoat = 1;
+                                        i = cgltf_parse_json_clearcoat(options, tokens, i + 1, json_chunk, &out_material->clearcoat);
+                                }
+                                else if (cgltf_json_strcmp(tokens+i, json_chunk, "KHR_materials_ior") == 0)
+                                {
+                                        out_material->has_ior = 1;
+                                        i = cgltf_parse_json_ior(tokens, i + 1, json_chunk, &out_material->ior);
+                                }
+                                else if (cgltf_json_strcmp(tokens+i, json_chunk, "KHR_materials_specular") == 0)
+                                {
+                                        out_material->has_specular = 1;
+                                        i = cgltf_parse_json_specular(options, tokens, i + 1, json_chunk, &out_material->specular);
+                                }
+                                else if (cgltf_json_strcmp(tokens+i, json_chunk, "KHR_materials_transmission") == 0)
+                                {
+                                        out_material->has_transmission = 1;
+                                        i = cgltf_parse_json_transmission(options, tokens, i + 1, json_chunk, &out_material->transmission);
+                                }
+                                else
+                                {
+                                        i = cgltf_parse_json_unprocessed_extension(options, tokens, i, json_chunk, &(out_material->extensions[out_material->extensions_count++]));
+                                }
+
+                                if (i < 0)
+                                {
+                                        return i;
+                                }
+                        }
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i+1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_accessors(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
+{
+        i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_accessor), (void**)&out_data->accessors, &out_data->accessors_count);
+        if (i < 0)
+        {
+                return i;
+        }
+
+        for (cgltf_size j = 0; j < out_data->accessors_count; ++j)
+        {
+                i = cgltf_parse_json_accessor(options, tokens, i, json_chunk, &out_data->accessors[j]);
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+        return i;
+}
+
+static int cgltf_parse_json_materials(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
+{
+        i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_material), (void**)&out_data->materials, &out_data->materials_count);
+        if (i < 0)
+        {
+                return i;
+        }
+
+        for (cgltf_size j = 0; j < out_data->materials_count; ++j)
+        {
+                i = cgltf_parse_json_material(options, tokens, i, json_chunk, &out_data->materials[j]);
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+        return i;
+}
+
+static int cgltf_parse_json_images(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
+{
+        i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_image), (void**)&out_data->images, &out_data->images_count);
+        if (i < 0)
+        {
+                return i;
+        }
+
+        for (cgltf_size j = 0; j < out_data->images_count; ++j)
+        {
+                i = cgltf_parse_json_image(options, tokens, i, json_chunk, &out_data->images[j]);
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+        return i;
+}
+
+static int cgltf_parse_json_textures(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
+{
+        i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_texture), (void**)&out_data->textures, &out_data->textures_count);
+        if (i < 0)
+        {
+                return i;
+        }
+
+        for (cgltf_size j = 0; j < out_data->textures_count; ++j)
+        {
+                i = cgltf_parse_json_texture(options, tokens, i, json_chunk, &out_data->textures[j]);
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+        return i;
+}
+
+static int cgltf_parse_json_samplers(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
+{
+        i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_sampler), (void**)&out_data->samplers, &out_data->samplers_count);
+        if (i < 0)
+        {
+                return i;
+        }
+
+        for (cgltf_size j = 0; j < out_data->samplers_count; ++j)
+        {
+                i = cgltf_parse_json_sampler(options, tokens, i, json_chunk, &out_data->samplers[j]);
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+        return i;
+}
+
+static int cgltf_parse_json_buffer_view(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_buffer_view* out_buffer_view)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens+i, json_chunk, "buffer") == 0)
+                {
+                        ++i;
+                        out_buffer_view->buffer = CGLTF_PTRINDEX(cgltf_buffer, cgltf_json_to_int(tokens + i, json_chunk));
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "byteOffset") == 0)
+                {
+                        ++i;
+                        out_buffer_view->offset =
+                                        cgltf_json_to_int(tokens+i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "byteLength") == 0)
+                {
+                        ++i;
+                        out_buffer_view->size =
+                                        cgltf_json_to_int(tokens+i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "byteStride") == 0)
+                {
+                        ++i;
+                        out_buffer_view->stride =
+                                        cgltf_json_to_int(tokens+i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "target") == 0)
+                {
+                        ++i;
+                        int type = cgltf_json_to_int(tokens+i, json_chunk);
+                        switch (type)
+                        {
+                        case 34962:
+                                type = cgltf_buffer_view_type_vertices;
+                                break;
+                        case 34963:
+                                type = cgltf_buffer_view_type_indices;
+                                break;
+                        default:
+                                type = cgltf_buffer_view_type_invalid;
+                                break;
+                        }
+                        out_buffer_view->type = (cgltf_buffer_view_type)type;
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
+                {
+                        i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_buffer_view->extras);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
+                {
+                        i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_buffer_view->extensions_count, &out_buffer_view->extensions);
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i+1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_buffer_views(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
+{
+        i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_buffer_view), (void**)&out_data->buffer_views, &out_data->buffer_views_count);
+        if (i < 0)
+        {
+                return i;
+        }
+
+        for (cgltf_size j = 0; j < out_data->buffer_views_count; ++j)
+        {
+                i = cgltf_parse_json_buffer_view(options, tokens, i, json_chunk, &out_data->buffer_views[j]);
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+        return i;
+}
+
+static int cgltf_parse_json_buffer(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_buffer* out_buffer)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens+i, json_chunk, "byteLength") == 0)
+                {
+                        ++i;
+                        out_buffer->size =
+                                        cgltf_json_to_int(tokens+i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "uri") == 0)
+                {
+                        i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_buffer->uri);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
+                {
+                        i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_buffer->extras);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
+                {
+                        i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_buffer->extensions_count, &out_buffer->extensions);
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i+1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_buffers(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
+{
+        i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_buffer), (void**)&out_data->buffers, &out_data->buffers_count);
+        if (i < 0)
+        {
+                return i;
+        }
+
+        for (cgltf_size j = 0; j < out_data->buffers_count; ++j)
+        {
+                i = cgltf_parse_json_buffer(options, tokens, i, json_chunk, &out_data->buffers[j]);
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+        return i;
+}
+
+static int cgltf_parse_json_skin(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_skin* out_skin)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens+i, json_chunk, "name") == 0)
+                {
+                        i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_skin->name);
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "joints") == 0)
+                {
+                        i = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_node*), (void**)&out_skin->joints, &out_skin->joints_count);
+                        if (i < 0)
+                        {
+                                return i;
+                        }
+
+                        for (cgltf_size k = 0; k < out_skin->joints_count; ++k)
+                        {
+                                out_skin->joints[k] = CGLTF_PTRINDEX(cgltf_node, cgltf_json_to_int(tokens + i, json_chunk));
+                                ++i;
+                        }
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "skeleton") == 0)
+                {
+                        ++i;
+                        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_PRIMITIVE);
+                        out_skin->skeleton = CGLTF_PTRINDEX(cgltf_node, cgltf_json_to_int(tokens + i, json_chunk));
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "inverseBindMatrices") == 0)
+                {
+                        ++i;
+                        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_PRIMITIVE);
+                        out_skin->inverse_bind_matrices = CGLTF_PTRINDEX(cgltf_accessor, cgltf_json_to_int(tokens + i, json_chunk));
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
+                {
+                        i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_skin->extras);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
+                {
+                        i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_skin->extensions_count, &out_skin->extensions);
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i+1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_skins(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
+{
+        i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_skin), (void**)&out_data->skins, &out_data->skins_count);
+        if (i < 0)
+        {
+                return i;
+        }
+
+        for (cgltf_size j = 0; j < out_data->skins_count; ++j)
+        {
+                i = cgltf_parse_json_skin(options, tokens, i, json_chunk, &out_data->skins[j]);
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+        return i;
+}
+
+static int cgltf_parse_json_camera(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_camera* out_camera)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens+i, json_chunk, "name") == 0)
+                {
+                        i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_camera->name);
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "type") == 0)
+                {
+                        ++i;
+                        if (cgltf_json_strcmp(tokens + i, json_chunk, "perspective") == 0)
+                        {
+                                out_camera->type = cgltf_camera_type_perspective;
+                        }
+                        else if (cgltf_json_strcmp(tokens + i, json_chunk, "orthographic") == 0)
+                        {
+                                out_camera->type = cgltf_camera_type_orthographic;
+                        }
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "perspective") == 0)
+                {
+                        ++i;
+
+                        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+                        int data_size = tokens[i].size;
+                        ++i;
+
+                        out_camera->type = cgltf_camera_type_perspective;
+
+                        for (int k = 0; k < data_size; ++k)
+                        {
+                                CGLTF_CHECK_KEY(tokens[i]);
+
+                                if (cgltf_json_strcmp(tokens+i, json_chunk, "aspectRatio") == 0)
+                                {
+                                        ++i;
+                                        out_camera->data.perspective.aspect_ratio = cgltf_json_to_float(tokens + i, json_chunk);
+                                        ++i;
+                                }
+                                else if (cgltf_json_strcmp(tokens+i, json_chunk, "yfov") == 0)
+                                {
+                                        ++i;
+                                        out_camera->data.perspective.yfov = cgltf_json_to_float(tokens + i, json_chunk);
+                                        ++i;
+                                }
+                                else if (cgltf_json_strcmp(tokens+i, json_chunk, "zfar") == 0)
+                                {
+                                        ++i;
+                                        out_camera->data.perspective.zfar = cgltf_json_to_float(tokens + i, json_chunk);
+                                        ++i;
+                                }
+                                else if (cgltf_json_strcmp(tokens+i, json_chunk, "znear") == 0)
+                                {
+                                        ++i;
+                                        out_camera->data.perspective.znear = cgltf_json_to_float(tokens + i, json_chunk);
+                                        ++i;
+                                }
+                                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
+                                {
+                                        i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_camera->data.perspective.extras);
+                                }
+                                else
+                                {
+                                        i = cgltf_skip_json(tokens, i+1);
+                                }
+
+                                if (i < 0)
+                                {
+                                        return i;
+                                }
+                        }
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "orthographic") == 0)
+                {
+                        ++i;
+
+                        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+                        int data_size = tokens[i].size;
+                        ++i;
+
+                        out_camera->type = cgltf_camera_type_orthographic;
+
+                        for (int k = 0; k < data_size; ++k)
+                        {
+                                CGLTF_CHECK_KEY(tokens[i]);
+
+                                if (cgltf_json_strcmp(tokens+i, json_chunk, "xmag") == 0)
+                                {
+                                        ++i;
+                                        out_camera->data.orthographic.xmag = cgltf_json_to_float(tokens + i, json_chunk);
+                                        ++i;
+                                }
+                                else if (cgltf_json_strcmp(tokens+i, json_chunk, "ymag") == 0)
+                                {
+                                        ++i;
+                                        out_camera->data.orthographic.ymag = cgltf_json_to_float(tokens + i, json_chunk);
+                                        ++i;
+                                }
+                                else if (cgltf_json_strcmp(tokens+i, json_chunk, "zfar") == 0)
+                                {
+                                        ++i;
+                                        out_camera->data.orthographic.zfar = cgltf_json_to_float(tokens + i, json_chunk);
+                                        ++i;
+                                }
+                                else if (cgltf_json_strcmp(tokens+i, json_chunk, "znear") == 0)
+                                {
+                                        ++i;
+                                        out_camera->data.orthographic.znear = cgltf_json_to_float(tokens + i, json_chunk);
+                                        ++i;
+                                }
+                                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
+                                {
+                                        i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_camera->data.orthographic.extras);
+                                }
+                                else
+                                {
+                                        i = cgltf_skip_json(tokens, i+1);
+                                }
+
+                                if (i < 0)
+                                {
+                                        return i;
+                                }
+                        }
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
+                {
+                        i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_camera->extras);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
+                {
+                        i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_camera->extensions_count, &out_camera->extensions);
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i+1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_cameras(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
+{
+        i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_camera), (void**)&out_data->cameras, &out_data->cameras_count);
+        if (i < 0)
+        {
+                return i;
+        }
+
+        for (cgltf_size j = 0; j < out_data->cameras_count; ++j)
+        {
+                i = cgltf_parse_json_camera(options, tokens, i, json_chunk, &out_data->cameras[j]);
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+        return i;
+}
+
+static int cgltf_parse_json_light(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_light* out_light)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens+i, json_chunk, "name") == 0)
+                {
+                        i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_light->name);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "color") == 0)
+                {
+                        i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_light->color, 3);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "intensity") == 0)
+                {
+                        ++i;
+                        out_light->intensity = cgltf_json_to_float(tokens + i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "type") == 0)
+                {
+                        ++i;
+                        if (cgltf_json_strcmp(tokens + i, json_chunk, "directional") == 0)
+                        {
+                                out_light->type = cgltf_light_type_directional;
+                        }
+                        else if (cgltf_json_strcmp(tokens + i, json_chunk, "point") == 0)
+                        {
+                                out_light->type = cgltf_light_type_point;
+                        }
+                        else if (cgltf_json_strcmp(tokens + i, json_chunk, "spot") == 0)
+                        {
+                                out_light->type = cgltf_light_type_spot;
+                        }
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "range") == 0)
+                {
+                        ++i;
+                        out_light->range = cgltf_json_to_float(tokens + i, json_chunk);
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "spot") == 0)
+                {
+                        ++i;
+
+                        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+                        int data_size = tokens[i].size;
+                        ++i;
+
+                        for (int k = 0; k < data_size; ++k)
+                        {
+                                CGLTF_CHECK_KEY(tokens[i]);
+
+                                if (cgltf_json_strcmp(tokens+i, json_chunk, "innerConeAngle") == 0)
+                                {
+                                        ++i;
+                                        out_light->spot_inner_cone_angle = cgltf_json_to_float(tokens + i, json_chunk);
+                                        ++i;
+                                }
+                                else if (cgltf_json_strcmp(tokens+i, json_chunk, "outerConeAngle") == 0)
+                                {
+                                        ++i;
+                                        out_light->spot_outer_cone_angle = cgltf_json_to_float(tokens + i, json_chunk);
+                                        ++i;
+                                }
+                                else
+                                {
+                                        i = cgltf_skip_json(tokens, i+1);
+                                }
+
+                                if (i < 0)
+                                {
+                                        return i;
+                                }
+                        }
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i+1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_lights(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
+{
+        i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_light), (void**)&out_data->lights, &out_data->lights_count);
+        if (i < 0)
+        {
+                return i;
+        }
+
+        for (cgltf_size j = 0; j < out_data->lights_count; ++j)
+        {
+                i = cgltf_parse_json_light(options, tokens, i, json_chunk, &out_data->lights[j]);
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+        return i;
+}
+
+static int cgltf_parse_json_node(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_node* out_node)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        out_node->rotation[3] = 1.0f;
+        out_node->scale[0] = 1.0f;
+        out_node->scale[1] = 1.0f;
+        out_node->scale[2] = 1.0f;
+        out_node->matrix[0] = 1.0f;
+        out_node->matrix[5] = 1.0f;
+        out_node->matrix[10] = 1.0f;
+        out_node->matrix[15] = 1.0f;
+
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens+i, json_chunk, "name") == 0)
+                {
+                        i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_node->name);
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "children") == 0)
+                {
+                        i = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_node*), (void**)&out_node->children, &out_node->children_count);
+                        if (i < 0)
+                        {
+                                return i;
+                        }
+
+                        for (cgltf_size k = 0; k < out_node->children_count; ++k)
+                        {
+                                out_node->children[k] = CGLTF_PTRINDEX(cgltf_node, cgltf_json_to_int(tokens + i, json_chunk));
+                                ++i;
+                        }
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "mesh") == 0)
+                {
+                        ++i;
+                        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_PRIMITIVE);
+                        out_node->mesh = CGLTF_PTRINDEX(cgltf_mesh, cgltf_json_to_int(tokens + i, json_chunk));
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "skin") == 0)
+                {
+                        ++i;
+                        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_PRIMITIVE);
+                        out_node->skin = CGLTF_PTRINDEX(cgltf_skin, cgltf_json_to_int(tokens + i, json_chunk));
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "camera") == 0)
+                {
+                        ++i;
+                        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_PRIMITIVE);
+                        out_node->camera = CGLTF_PTRINDEX(cgltf_camera, cgltf_json_to_int(tokens + i, json_chunk));
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "translation") == 0)
+                {
+                        out_node->has_translation = 1;
+                        i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_node->translation, 3);
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "rotation") == 0)
+                {
+                        out_node->has_rotation = 1;
+                        i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_node->rotation, 4);
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "scale") == 0)
+                {
+                        out_node->has_scale = 1;
+                        i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_node->scale, 3);
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "matrix") == 0)
+                {
+                        out_node->has_matrix = 1;
+                        i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_node->matrix, 16);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "weights") == 0)
+                {
+                        i = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_float), (void**)&out_node->weights, &out_node->weights_count);
+                        if (i < 0)
+                        {
+                                return i;
+                        }
+
+                        i = cgltf_parse_json_float_array(tokens, i - 1, json_chunk, out_node->weights, (int)out_node->weights_count);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
+                {
+                        i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_node->extras);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
+                {
+                        ++i;
+
+                        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+                        if(out_node->extensions)
+                        {
+                                return CGLTF_ERROR_JSON;
+                        }
+
+                        int extensions_size = tokens[i].size;
+                        out_node->extensions_count= 0;
+                        out_node->extensions = (cgltf_extension*)cgltf_calloc(options, sizeof(cgltf_extension), extensions_size);
+
+                        if (!out_node->extensions)
+                        {
+                                return CGLTF_ERROR_NOMEM;
+                        }
+
+                        ++i;
+
+                        for (int k = 0; k < extensions_size; ++k)
+                        {
+                                CGLTF_CHECK_KEY(tokens[i]);
+
+                                if (cgltf_json_strcmp(tokens+i, json_chunk, "KHR_lights_punctual") == 0)
+                                {
+                                        ++i;
+
+                                        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+                                        int data_size = tokens[i].size;
+                                        ++i;
+
+                                        for (int m = 0; m < data_size; ++m)
+                                        {
+                                                CGLTF_CHECK_KEY(tokens[i]);
+
+                                                if (cgltf_json_strcmp(tokens + i, json_chunk, "light") == 0)
+                                                {
+                                                        ++i;
+                                                        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_PRIMITIVE);
+                                                        out_node->light = CGLTF_PTRINDEX(cgltf_light, cgltf_json_to_int(tokens + i, json_chunk));
+                                                        ++i;
+                                                }
+                                                else
+                                                {
+                                                        i = cgltf_skip_json(tokens, i + 1);
+                                                }
+
+                                                if (i < 0)
+                                                {
+                                                        return i;
+                                                }
+                                        }
+                                }
+                                else
+                                {
+                                        i = cgltf_parse_json_unprocessed_extension(options, tokens, i, json_chunk, &(out_node->extensions[out_node->extensions_count++]));
+                                }
+
+                                if (i < 0)
+                                {
+                                        return i;
+                                }
+                        }
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i+1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_nodes(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
+{
+        i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_node), (void**)&out_data->nodes, &out_data->nodes_count);
+        if (i < 0)
+        {
+                return i;
+        }
+
+        for (cgltf_size j = 0; j < out_data->nodes_count; ++j)
+        {
+                i = cgltf_parse_json_node(options, tokens, i, json_chunk, &out_data->nodes[j]);
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+        return i;
+}
+
+static int cgltf_parse_json_scene(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_scene* out_scene)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens+i, json_chunk, "name") == 0)
+                {
+                        i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_scene->name);
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "nodes") == 0)
+                {
+                        i = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_node*), (void**)&out_scene->nodes, &out_scene->nodes_count);
+                        if (i < 0)
+                        {
+                                return i;
+                        }
+
+                        for (cgltf_size k = 0; k < out_scene->nodes_count; ++k)
+                        {
+                                out_scene->nodes[k] = CGLTF_PTRINDEX(cgltf_node, cgltf_json_to_int(tokens + i, json_chunk));
+                                ++i;
+                        }
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
+                {
+                        i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_scene->extras);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
+                {
+                        i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_scene->extensions_count, &out_scene->extensions);
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i+1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_scenes(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
+{
+        i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_scene), (void**)&out_data->scenes, &out_data->scenes_count);
+        if (i < 0)
+        {
+                return i;
+        }
+
+        for (cgltf_size j = 0; j < out_data->scenes_count; ++j)
+        {
+                i = cgltf_parse_json_scene(options, tokens, i, json_chunk, &out_data->scenes[j]);
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+        return i;
+}
+
+static int cgltf_parse_json_animation_sampler(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_animation_sampler* out_sampler)
+{
+        (void)options;
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens+i, json_chunk, "input") == 0)
+                {
+                        ++i;
+                        out_sampler->input = CGLTF_PTRINDEX(cgltf_accessor, cgltf_json_to_int(tokens + i, json_chunk));
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "output") == 0)
+                {
+                        ++i;
+                        out_sampler->output = CGLTF_PTRINDEX(cgltf_accessor, cgltf_json_to_int(tokens + i, json_chunk));
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "interpolation") == 0)
+                {
+                        ++i;
+                        if (cgltf_json_strcmp(tokens + i, json_chunk, "LINEAR") == 0)
+                        {
+                                out_sampler->interpolation = cgltf_interpolation_type_linear;
+                        }
+                        else if (cgltf_json_strcmp(tokens + i, json_chunk, "STEP") == 0)
+                        {
+                                out_sampler->interpolation = cgltf_interpolation_type_step;
+                        }
+                        else if (cgltf_json_strcmp(tokens + i, json_chunk, "CUBICSPLINE") == 0)
+                        {
+                                out_sampler->interpolation = cgltf_interpolation_type_cubic_spline;
+                        }
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
+                {
+                        i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_sampler->extras);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
+                {
+                        i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_sampler->extensions_count, &out_sampler->extensions);
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i+1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_animation_channel(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_animation_channel* out_channel)
+{
+        (void)options;
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens+i, json_chunk, "sampler") == 0)
+                {
+                        ++i;
+                        out_channel->sampler = CGLTF_PTRINDEX(cgltf_animation_sampler, cgltf_json_to_int(tokens + i, json_chunk));
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "target") == 0)
+                {
+                        ++i;
+
+                        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+                        int target_size = tokens[i].size;
+                        ++i;
+
+                        for (int k = 0; k < target_size; ++k)
+                        {
+                                CGLTF_CHECK_KEY(tokens[i]);
+
+                                if (cgltf_json_strcmp(tokens+i, json_chunk, "node") == 0)
+                                {
+                                        ++i;
+                                        out_channel->target_node = CGLTF_PTRINDEX(cgltf_node, cgltf_json_to_int(tokens + i, json_chunk));
+                                        ++i;
+                                }
+                                else if (cgltf_json_strcmp(tokens+i, json_chunk, "path") == 0)
+                                {
+                                        ++i;
+                                        if (cgltf_json_strcmp(tokens+i, json_chunk, "translation") == 0)
+                                        {
+                                                out_channel->target_path = cgltf_animation_path_type_translation;
+                                        }
+                                        else if (cgltf_json_strcmp(tokens+i, json_chunk, "rotation") == 0)
+                                        {
+                                                out_channel->target_path = cgltf_animation_path_type_rotation;
+                                        }
+                                        else if (cgltf_json_strcmp(tokens+i, json_chunk, "scale") == 0)
+                                        {
+                                                out_channel->target_path = cgltf_animation_path_type_scale;
+                                        }
+                                        else if (cgltf_json_strcmp(tokens+i, json_chunk, "weights") == 0)
+                                        {
+                                                out_channel->target_path = cgltf_animation_path_type_weights;
+                                        }
+                                        ++i;
+                                }
+                                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
+                                {
+                                        i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_channel->extras);
+                                }
+                                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
+                                {
+                                        i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_channel->extensions_count, &out_channel->extensions);
+                                }
+                                else
+                                {
+                                        i = cgltf_skip_json(tokens, i+1);
+                                }
+
+                                if (i < 0)
+                                {
+                                        return i;
+                                }
+                        }
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i+1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_animation(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_animation* out_animation)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens+i, json_chunk, "name") == 0)
+                {
+                        i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_animation->name);
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "samplers") == 0)
+                {
+                        i = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_animation_sampler), (void**)&out_animation->samplers, &out_animation->samplers_count);
+                        if (i < 0)
+                        {
+                                return i;
+                        }
+
+                        for (cgltf_size k = 0; k < out_animation->samplers_count; ++k)
+                        {
+                                i = cgltf_parse_json_animation_sampler(options, tokens, i, json_chunk, &out_animation->samplers[k]);
+                                if (i < 0)
+                                {
+                                        return i;
+                                }
+                        }
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "channels") == 0)
+                {
+                        i = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_animation_channel), (void**)&out_animation->channels, &out_animation->channels_count);
+                        if (i < 0)
+                        {
+                                return i;
+                        }
+
+                        for (cgltf_size k = 0; k < out_animation->channels_count; ++k)
+                        {
+                                i = cgltf_parse_json_animation_channel(options, tokens, i, json_chunk, &out_animation->channels[k]);
+                                if (i < 0)
+                                {
+                                        return i;
+                                }
+                        }
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
+                {
+                        i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_animation->extras);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
+                {
+                        i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_animation->extensions_count, &out_animation->extensions);
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i+1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+static int cgltf_parse_json_animations(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
+{
+        i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_animation), (void**)&out_data->animations, &out_data->animations_count);
+        if (i < 0)
+        {
+                return i;
+        }
+
+        for (cgltf_size j = 0; j < out_data->animations_count; ++j)
+        {
+                i = cgltf_parse_json_animation(options, tokens, i, json_chunk, &out_data->animations[j]);
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+        return i;
+}
+
+static int cgltf_parse_json_asset(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_asset* out_asset)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens+i, json_chunk, "copyright") == 0)
+                {
+                        i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_asset->copyright);
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "generator") == 0)
+                {
+                        i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_asset->generator);
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "version") == 0)
+                {
+                        i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_asset->version);
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "minVersion") == 0)
+                {
+                        i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_asset->min_version);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
+                {
+                        i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_asset->extras);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
+                {
+                        i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_asset->extensions_count, &out_asset->extensions);
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i+1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        if (out_asset->version && CGLTF_ATOF(out_asset->version) < 2)
+        {
+                return CGLTF_ERROR_LEGACY;
+        }
+
+        return i;
+}
+
+cgltf_size cgltf_num_components(cgltf_type type) {
+        switch (type)
+        {
+        case cgltf_type_vec2:
+                return 2;
+        case cgltf_type_vec3:
+                return 3;
+        case cgltf_type_vec4:
+                return 4;
+        case cgltf_type_mat2:
+                return 4;
+        case cgltf_type_mat3:
+                return 9;
+        case cgltf_type_mat4:
+                return 16;
+        case cgltf_type_invalid:
+        case cgltf_type_scalar:
+        default:
+                return 1;
+        }
+}
+
+static cgltf_size cgltf_component_size(cgltf_component_type component_type) {
+        switch (component_type)
+        {
+        case cgltf_component_type_r_8:
+        case cgltf_component_type_r_8u:
+                return 1;
+        case cgltf_component_type_r_16:
+        case cgltf_component_type_r_16u:
+                return 2;
+        case cgltf_component_type_r_32u:
+        case cgltf_component_type_r_32f:
+                return 4;
+        case cgltf_component_type_invalid:
+        default:
+                return 0;
+        }
+}
+
+static cgltf_size cgltf_calc_size(cgltf_type type, cgltf_component_type component_type)
+{
+        cgltf_size component_size = cgltf_component_size(component_type);
+        if (type == cgltf_type_mat2 && component_size == 1)
+        {
+                return 8 * component_size;
+        }
+        else if (type == cgltf_type_mat3 && (component_size == 1 || component_size == 2))
+        {
+                return 12 * component_size;
+        }
+        return component_size * cgltf_num_components(type);
+}
+
+static int cgltf_fixup_pointers(cgltf_data* out_data);
+
+static int cgltf_parse_json_root(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
+{
+        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+        int size = tokens[i].size;
+        ++i;
+
+        for (int j = 0; j < size; ++j)
+        {
+                CGLTF_CHECK_KEY(tokens[i]);
+
+                if (cgltf_json_strcmp(tokens + i, json_chunk, "asset") == 0)
+                {
+                        i = cgltf_parse_json_asset(options, tokens, i + 1, json_chunk, &out_data->asset);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "meshes") == 0)
+                {
+                        i = cgltf_parse_json_meshes(options, tokens, i + 1, json_chunk, out_data);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "accessors") == 0)
+                {
+                        i = cgltf_parse_json_accessors(options, tokens, i + 1, json_chunk, out_data);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "bufferViews") == 0)
+                {
+                        i = cgltf_parse_json_buffer_views(options, tokens, i + 1, json_chunk, out_data);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "buffers") == 0)
+                {
+                        i = cgltf_parse_json_buffers(options, tokens, i + 1, json_chunk, out_data);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "materials") == 0)
+                {
+                        i = cgltf_parse_json_materials(options, tokens, i + 1, json_chunk, out_data);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "images") == 0)
+                {
+                        i = cgltf_parse_json_images(options, tokens, i + 1, json_chunk, out_data);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "textures") == 0)
+                {
+                        i = cgltf_parse_json_textures(options, tokens, i + 1, json_chunk, out_data);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "samplers") == 0)
+                {
+                        i = cgltf_parse_json_samplers(options, tokens, i + 1, json_chunk, out_data);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "skins") == 0)
+                {
+                        i = cgltf_parse_json_skins(options, tokens, i + 1, json_chunk, out_data);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "cameras") == 0)
+                {
+                        i = cgltf_parse_json_cameras(options, tokens, i + 1, json_chunk, out_data);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "nodes") == 0)
+                {
+                        i = cgltf_parse_json_nodes(options, tokens, i + 1, json_chunk, out_data);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "scenes") == 0)
+                {
+                        i = cgltf_parse_json_scenes(options, tokens, i + 1, json_chunk, out_data);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "scene") == 0)
+                {
+                        ++i;
+                        out_data->scene = CGLTF_PTRINDEX(cgltf_scene, cgltf_json_to_int(tokens + i, json_chunk));
+                        ++i;
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "animations") == 0)
+                {
+                        i = cgltf_parse_json_animations(options, tokens, i + 1, json_chunk, out_data);
+                }
+                else if (cgltf_json_strcmp(tokens+i, json_chunk, "extras") == 0)
+                {
+                        i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_data->extras);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
+                {
+                        ++i;
+
+                        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+                        if(out_data->data_extensions)
+                        {
+                                return CGLTF_ERROR_JSON;
+                        }
+
+                        int extensions_size = tokens[i].size;
+                        out_data->data_extensions_count = 0;
+                        out_data->data_extensions = (cgltf_extension*)cgltf_calloc(options, sizeof(cgltf_extension), extensions_size);
+
+                        if (!out_data->data_extensions)
+                        {
+                                return CGLTF_ERROR_NOMEM;
+                        }
+
+                        ++i;
+
+                        for (int k = 0; k < extensions_size; ++k)
+                        {
+                                CGLTF_CHECK_KEY(tokens[i]);
+
+                                if (cgltf_json_strcmp(tokens+i, json_chunk, "KHR_lights_punctual") == 0)
+                                {
+                                        ++i;
+
+                                        CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+
+                                        int data_size = tokens[i].size;
+                                        ++i;
+
+                                        for (int m = 0; m < data_size; ++m)
+                                        {
+                                                CGLTF_CHECK_KEY(tokens[i]);
+
+                                                if (cgltf_json_strcmp(tokens + i, json_chunk, "lights") == 0)
+                                                {
+                                                        i = cgltf_parse_json_lights(options, tokens, i + 1, json_chunk, out_data);
+                                                }
+                                                else
+                                                {
+                                                        i = cgltf_skip_json(tokens, i + 1);
+                                                }
+
+                                                if (i < 0)
+                                                {
+                                                        return i;
+                                                }
+                                        }
+                                }
+                                else
+                                {
+                                        i = cgltf_parse_json_unprocessed_extension(options, tokens, i, json_chunk, &(out_data->data_extensions[out_data->data_extensions_count++]));
+                                }
+
+                                if (i < 0)
+                                {
+                                        return i;
+                                }
+                        }
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensionsUsed") == 0)
+                {
+                        i = cgltf_parse_json_string_array(options, tokens, i + 1, json_chunk, &out_data->extensions_used, &out_data->extensions_used_count);
+                }
+                else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensionsRequired") == 0)
+                {
+                        i = cgltf_parse_json_string_array(options, tokens, i + 1, json_chunk, &out_data->extensions_required, &out_data->extensions_required_count);
+                }
+                else
+                {
+                        i = cgltf_skip_json(tokens, i + 1);
+                }
+
+                if (i < 0)
+                {
+                        return i;
+                }
+        }
+
+        return i;
+}
+
+cgltf_result cgltf_parse_json(cgltf_options* options, const uint8_t* json_chunk, cgltf_size size, cgltf_data** out_data)
+{
+        jsmn_parser parser = { 0, 0, 0 };
+
+        if (options->json_token_count == 0)
+        {
+                int token_count = jsmn_parse(&parser, (const char*)json_chunk, size, NULL, 0);
+
+                if (token_count <= 0)
+                {
+                        return cgltf_result_invalid_json;
+                }
+
+                options->json_token_count = token_count;
+        }
+
+        jsmntok_t* tokens = (jsmntok_t*)options->memory.alloc(options->memory.user_data, sizeof(jsmntok_t) * (options->json_token_count + 1));
+
+        if (!tokens)
+        {
+                return cgltf_result_out_of_memory;
+        }
+
+        jsmn_init(&parser);
+
+        int token_count = jsmn_parse(&parser, (const char*)json_chunk, size, tokens, options->json_token_count);
+
+        if (token_count <= 0)
+        {
+                options->memory.free(options->memory.user_data, tokens);
+                return cgltf_result_invalid_json;
+        }
+
+        // this makes sure that we always have an UNDEFINED token at the end of the stream
+        // for invalid JSON inputs this makes sure we don't perform out of bound reads of token data
+        tokens[token_count].type = JSMN_UNDEFINED;
+
+        cgltf_data* data = (cgltf_data*)options->memory.alloc(options->memory.user_data, sizeof(cgltf_data));
+
+        if (!data)
+        {
+                options->memory.free(options->memory.user_data, tokens);
+                return cgltf_result_out_of_memory;
+        }
+
+        memset(data, 0, sizeof(cgltf_data));
+        data->memory = options->memory;
+        data->file = options->file;
+
+        int i = cgltf_parse_json_root(options, tokens, 0, json_chunk, data);
+
+        options->memory.free(options->memory.user_data, tokens);
+
+        if (i < 0)
+        {
+                cgltf_free(data);
+
+                switch (i)
+                {
+                case CGLTF_ERROR_NOMEM: return cgltf_result_out_of_memory;
+                case CGLTF_ERROR_LEGACY: return cgltf_result_legacy_gltf;
+                default: return cgltf_result_invalid_gltf;
+                }
+        }
+
+        if (cgltf_fixup_pointers(data) < 0)
+        {
+                cgltf_free(data);
+                return cgltf_result_invalid_gltf;
+        }
+
+        data->json = (const char*)json_chunk;
+        data->json_size = size;
+
+        *out_data = data;
+
+        return cgltf_result_success;
+}
+
+static int cgltf_fixup_pointers(cgltf_data* data)
+{
+        for (cgltf_size i = 0; i < data->meshes_count; ++i)
+        {
+                for (cgltf_size j = 0; j < data->meshes[i].primitives_count; ++j)
+                {
+                        CGLTF_PTRFIXUP(data->meshes[i].primitives[j].indices, data->accessors, data->accessors_count);
+                        CGLTF_PTRFIXUP(data->meshes[i].primitives[j].material, data->materials, data->materials_count);
+
+                        for (cgltf_size k = 0; k < data->meshes[i].primitives[j].attributes_count; ++k)
+                        {
+                                CGLTF_PTRFIXUP_REQ(data->meshes[i].primitives[j].attributes[k].data, data->accessors, data->accessors_count);
+                        }
+
+                        for (cgltf_size k = 0; k < data->meshes[i].primitives[j].targets_count; ++k)
+                        {
+                                for (cgltf_size m = 0; m < data->meshes[i].primitives[j].targets[k].attributes_count; ++m)
+                                {
+                                        CGLTF_PTRFIXUP_REQ(data->meshes[i].primitives[j].targets[k].attributes[m].data, data->accessors, data->accessors_count);
+                                }
+                        }
+
+                        if (data->meshes[i].primitives[j].has_draco_mesh_compression)
+                        {
+                                CGLTF_PTRFIXUP_REQ(data->meshes[i].primitives[j].draco_mesh_compression.buffer_view, data->buffer_views, data->buffer_views_count);
+                                for (cgltf_size m = 0; m < data->meshes[i].primitives[j].draco_mesh_compression.attributes_count; ++m)
+                                {
+                                        CGLTF_PTRFIXUP_REQ(data->meshes[i].primitives[j].draco_mesh_compression.attributes[m].data, data->accessors, data->accessors_count);
+                                }
+                        }
+                }
+        }
+
+        for (cgltf_size i = 0; i < data->accessors_count; ++i)
+        {
+                CGLTF_PTRFIXUP(data->accessors[i].buffer_view, data->buffer_views, data->buffer_views_count);
+
+                if (data->accessors[i].is_sparse)
+                {
+                        CGLTF_PTRFIXUP_REQ(data->accessors[i].sparse.indices_buffer_view, data->buffer_views, data->buffer_views_count);
+                        CGLTF_PTRFIXUP_REQ(data->accessors[i].sparse.values_buffer_view, data->buffer_views, data->buffer_views_count);
+                }
+
+                if (data->accessors[i].buffer_view)
+                {
+                        data->accessors[i].stride = data->accessors[i].buffer_view->stride;
+                }
+
+                if (data->accessors[i].stride == 0)
+                {
+                        data->accessors[i].stride = cgltf_calc_size(data->accessors[i].type, data->accessors[i].component_type);
+                }
+        }
+
+        for (cgltf_size i = 0; i < data->textures_count; ++i)
+        {
+                CGLTF_PTRFIXUP(data->textures[i].image, data->images, data->images_count);
+                CGLTF_PTRFIXUP(data->textures[i].sampler, data->samplers, data->samplers_count);
+        }
+
+        for (cgltf_size i = 0; i < data->images_count; ++i)
+        {
+                CGLTF_PTRFIXUP(data->images[i].buffer_view, data->buffer_views, data->buffer_views_count);
+        }
+
+        for (cgltf_size i = 0; i < data->materials_count; ++i)
+        {
+                CGLTF_PTRFIXUP(data->materials[i].normal_texture.texture, data->textures, data->textures_count);
+                CGLTF_PTRFIXUP(data->materials[i].emissive_texture.texture, data->textures, data->textures_count);
+                CGLTF_PTRFIXUP(data->materials[i].occlusion_texture.texture, data->textures, data->textures_count);
+
+                CGLTF_PTRFIXUP(data->materials[i].pbr_metallic_roughness.base_color_texture.texture, data->textures, data->textures_count);
+                CGLTF_PTRFIXUP(data->materials[i].pbr_metallic_roughness.metallic_roughness_texture.texture, data->textures, data->textures_count);
+
+                CGLTF_PTRFIXUP(data->materials[i].pbr_specular_glossiness.diffuse_texture.texture, data->textures, data->textures_count);
+                CGLTF_PTRFIXUP(data->materials[i].pbr_specular_glossiness.specular_glossiness_texture.texture, data->textures, data->textures_count);
+
+                CGLTF_PTRFIXUP(data->materials[i].clearcoat.clearcoat_texture.texture, data->textures, data->textures_count);
+                CGLTF_PTRFIXUP(data->materials[i].clearcoat.clearcoat_roughness_texture.texture, data->textures, data->textures_count);
+                CGLTF_PTRFIXUP(data->materials[i].clearcoat.clearcoat_normal_texture.texture, data->textures, data->textures_count);
+
+                CGLTF_PTRFIXUP(data->materials[i].specular.specular_texture.texture, data->textures, data->textures_count);
+
+                CGLTF_PTRFIXUP(data->materials[i].transmission.transmission_texture.texture, data->textures, data->textures_count);
+        }
+
+        for (cgltf_size i = 0; i < data->buffer_views_count; ++i)
+        {
+                CGLTF_PTRFIXUP_REQ(data->buffer_views[i].buffer, data->buffers, data->buffers_count);
+        }
+
+        for (cgltf_size i = 0; i < data->skins_count; ++i)
+        {
+                for (cgltf_size j = 0; j < data->skins[i].joints_count; ++j)
+                {
+                        CGLTF_PTRFIXUP_REQ(data->skins[i].joints[j], data->nodes, data->nodes_count);
+                }
+
+                CGLTF_PTRFIXUP(data->skins[i].skeleton, data->nodes, data->nodes_count);
+                CGLTF_PTRFIXUP(data->skins[i].inverse_bind_matrices, data->accessors, data->accessors_count);
+        }
+
+        for (cgltf_size i = 0; i < data->nodes_count; ++i)
+        {
+                for (cgltf_size j = 0; j < data->nodes[i].children_count; ++j)
+                {
+                        CGLTF_PTRFIXUP_REQ(data->nodes[i].children[j], data->nodes, data->nodes_count);
+
+                        if (data->nodes[i].children[j]->parent)
+                        {
+                                return CGLTF_ERROR_JSON;
+                        }
+
+                        data->nodes[i].children[j]->parent = &data->nodes[i];
+                }
+
+                CGLTF_PTRFIXUP(data->nodes[i].mesh, data->meshes, data->meshes_count);
+                CGLTF_PTRFIXUP(data->nodes[i].skin, data->skins, data->skins_count);
+                CGLTF_PTRFIXUP(data->nodes[i].camera, data->cameras, data->cameras_count);
+                CGLTF_PTRFIXUP(data->nodes[i].light, data->lights, data->lights_count);
+        }
+
+        for (cgltf_size i = 0; i < data->scenes_count; ++i)
+        {
+                for (cgltf_size j = 0; j < data->scenes[i].nodes_count; ++j)
+                {
+                        CGLTF_PTRFIXUP_REQ(data->scenes[i].nodes[j], data->nodes, data->nodes_count);
+
+                        if (data->scenes[i].nodes[j]->parent)
+                        {
+                                return CGLTF_ERROR_JSON;
+                        }
+                }
+        }
+
+        CGLTF_PTRFIXUP(data->scene, data->scenes, data->scenes_count);
+
+        for (cgltf_size i = 0; i < data->animations_count; ++i)
+        {
+                for (cgltf_size j = 0; j < data->animations[i].samplers_count; ++j)
+                {
+                        CGLTF_PTRFIXUP_REQ(data->animations[i].samplers[j].input, data->accessors, data->accessors_count);
+                        CGLTF_PTRFIXUP_REQ(data->animations[i].samplers[j].output, data->accessors, data->accessors_count);
+                }
+
+                for (cgltf_size j = 0; j < data->animations[i].channels_count; ++j)
+                {
+                        CGLTF_PTRFIXUP_REQ(data->animations[i].channels[j].sampler, data->animations[i].samplers, data->animations[i].samplers_count);
+                        CGLTF_PTRFIXUP(data->animations[i].channels[j].target_node, data->nodes, data->nodes_count);
+                }
+        }
+
+        return 0;
+}
+
+/*
+ * -- jsmn.c start --
+ * Source: https://github.com/zserge/jsmn
+ * License: MIT
+ *
+ * Copyright (c) 2010 Serge A. Zaitsev
+
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+/**
+ * Allocates a fresh unused token from the token pull.
+ */
+static jsmntok_t *jsmn_alloc_token(jsmn_parser *parser,
+                                   jsmntok_t *tokens, size_t num_tokens) {
+        jsmntok_t *tok;
+        if (parser->toknext >= num_tokens) {
+                return NULL;
+        }
+        tok = &tokens[parser->toknext++];
+        tok->start = tok->end = -1;
+        tok->size = 0;
+#ifdef JSMN_PARENT_LINKS
+        tok->parent = -1;
+#endif
+        return tok;
+}
+
+/**
+ * Fills token type and boundaries.
+ */
+static void jsmn_fill_token(jsmntok_t *token, jsmntype_t type,
+                            int start, int end) {
+        token->type = type;
+        token->start = start;
+        token->end = end;
+        token->size = 0;
+}
+
+/**
+ * Fills next available token with JSON primitive.
+ */
+static int jsmn_parse_primitive(jsmn_parser *parser, const char *js,
+                                size_t len, jsmntok_t *tokens, size_t num_tokens) {
+        jsmntok_t *token;
+        int start;
+
+        start = parser->pos;
+
+        for (; parser->pos < len && js[parser->pos] != '\0'; parser->pos++) {
+                switch (js[parser->pos]) {
+#ifndef JSMN_STRICT
+                /* In strict mode primitive must be followed by "," or "}" or "]" */
+                case ':':
+#endif
+                case '\t' : case '\r' : case '\n' : case ' ' :
+                case ','  : case ']'  : case '}' :
+                        goto found;
+                }
+                if (js[parser->pos] < 32 || js[parser->pos] >= 127) {
+                        parser->pos = start;
+                        return JSMN_ERROR_INVAL;
+                }
+        }
+#ifdef JSMN_STRICT
+        /* In strict mode primitive must be followed by a comma/object/array */
+        parser->pos = start;
+        return JSMN_ERROR_PART;
+#endif
+
+found:
+        if (tokens == NULL) {
+                parser->pos--;
+                return 0;
+        }
+        token = jsmn_alloc_token(parser, tokens, num_tokens);
+        if (token == NULL) {
+                parser->pos = start;
+                return JSMN_ERROR_NOMEM;
+        }
+        jsmn_fill_token(token, JSMN_PRIMITIVE, start, parser->pos);
+#ifdef JSMN_PARENT_LINKS
+        token->parent = parser->toksuper;
+#endif
+        parser->pos--;
+        return 0;
+}
+
+/**
+ * Fills next token with JSON string.
+ */
+static int jsmn_parse_string(jsmn_parser *parser, const char *js,
+                             size_t len, jsmntok_t *tokens, size_t num_tokens) {
+        jsmntok_t *token;
+
+        int start = parser->pos;
+
+        parser->pos++;
+
+        /* Skip starting quote */
+        for (; parser->pos < len && js[parser->pos] != '\0'; parser->pos++) {
+                char c = js[parser->pos];
+
+                /* Quote: end of string */
+                if (c == '\"') {
+                        if (tokens == NULL) {
+                                return 0;
+                        }
+                        token = jsmn_alloc_token(parser, tokens, num_tokens);
+                        if (token == NULL) {
+                                parser->pos = start;
+                                return JSMN_ERROR_NOMEM;
+                        }
+                        jsmn_fill_token(token, JSMN_STRING, start+1, parser->pos);
+#ifdef JSMN_PARENT_LINKS
+                        token->parent = parser->toksuper;
+#endif
+                        return 0;
+                }
+
+                /* Backslash: Quoted symbol expected */
+                if (c == '\\' && parser->pos + 1 < len) {
+                        int i;
+                        parser->pos++;
+                        switch (js[parser->pos]) {
+                        /* Allowed escaped symbols */
+                        case '\"': case '/' : case '\\' : case 'b' :
+                        case 'f' : case 'r' : case 'n'  : case 't' :
+                                break;
+                                /* Allows escaped symbol \uXXXX */
+                        case 'u':
+                                parser->pos++;
+                                for(i = 0; i < 4 && parser->pos < len && js[parser->pos] != '\0'; i++) {
+                                        /* If it isn't a hex character we have an error */
+                                        if(!((js[parser->pos] >= 48 && js[parser->pos] <= 57) || /* 0-9 */
+                                             (js[parser->pos] >= 65 && js[parser->pos] <= 70) || /* A-F */
+                                             (js[parser->pos] >= 97 && js[parser->pos] <= 102))) { /* a-f */
+                                                parser->pos = start;
+                                                return JSMN_ERROR_INVAL;
+                                        }
+                                        parser->pos++;
+                                }
+                                parser->pos--;
+                                break;
+                                /* Unexpected symbol */
+                        default:
+                                parser->pos = start;
+                                return JSMN_ERROR_INVAL;
+                        }
+                }
+        }
+        parser->pos = start;
+        return JSMN_ERROR_PART;
+}
+
+/**
+ * Parse JSON string and fill tokens.
+ */
+static int jsmn_parse(jsmn_parser *parser, const char *js, size_t len,
+               jsmntok_t *tokens, size_t num_tokens) {
+        int r;
+        int i;
+        jsmntok_t *token;
+        int count = parser->toknext;
+
+        for (; parser->pos < len && js[parser->pos] != '\0'; parser->pos++) {
+                char c;
+                jsmntype_t type;
+
+                c = js[parser->pos];
+                switch (c) {
+                case '{': case '[':
+                        count++;
+                        if (tokens == NULL) {
+                                break;
+                        }
+                        token = jsmn_alloc_token(parser, tokens, num_tokens);
+                        if (token == NULL)
+                                return JSMN_ERROR_NOMEM;
+                        if (parser->toksuper != -1) {
+                                tokens[parser->toksuper].size++;
+#ifdef JSMN_PARENT_LINKS
+                                token->parent = parser->toksuper;
+#endif
+                        }
+                        token->type = (c == '{' ? JSMN_OBJECT : JSMN_ARRAY);
+                        token->start = parser->pos;
+                        parser->toksuper = parser->toknext - 1;
+                        break;
+                case '}': case ']':
+                        if (tokens == NULL)
+                                break;
+                        type = (c == '}' ? JSMN_OBJECT : JSMN_ARRAY);
+#ifdef JSMN_PARENT_LINKS
+                        if (parser->toknext < 1) {
+                                return JSMN_ERROR_INVAL;
+                        }
+                        token = &tokens[parser->toknext - 1];
+                        for (;;) {
+                                if (token->start != -1 && token->end == -1) {
+                                        if (token->type != type) {
+                                                return JSMN_ERROR_INVAL;
+                                        }
+                                        token->end = parser->pos + 1;
+                                        parser->toksuper = token->parent;
+                                        break;
+                                }
+                                if (token->parent == -1) {
+                                        if(token->type != type || parser->toksuper == -1) {
+                                                return JSMN_ERROR_INVAL;
+                                        }
+                                        break;
+                                }
+                                token = &tokens[token->parent];
+                        }
+#else
+                        for (i = parser->toknext - 1; i >= 0; i--) {
+                                token = &tokens[i];
+                                if (token->start != -1 && token->end == -1) {
+                                        if (token->type != type) {
+                                                return JSMN_ERROR_INVAL;
+                                        }
+                                        parser->toksuper = -1;
+                                        token->end = parser->pos + 1;
+                                        break;
+                                }
+                        }
+                        /* Error if unmatched closing bracket */
+                        if (i == -1) return JSMN_ERROR_INVAL;
+                        for (; i >= 0; i--) {
+                                token = &tokens[i];
+                                if (token->start != -1 && token->end == -1) {
+                                        parser->toksuper = i;
+                                        break;
+                                }
+                        }
+#endif
+                        break;
+                case '\"':
+                        r = jsmn_parse_string(parser, js, len, tokens, num_tokens);
+                        if (r < 0) return r;
+                        count++;
+                        if (parser->toksuper != -1 && tokens != NULL)
+                                tokens[parser->toksuper].size++;
+                        break;
+                case '\t' : case '\r' : case '\n' : case ' ':
+                        break;
+                case ':':
+                        parser->toksuper = parser->toknext - 1;
+                        break;
+                case ',':
+                        if (tokens != NULL && parser->toksuper != -1 &&
+                                        tokens[parser->toksuper].type != JSMN_ARRAY &&
+                                        tokens[parser->toksuper].type != JSMN_OBJECT) {
+#ifdef JSMN_PARENT_LINKS
+                                parser->toksuper = tokens[parser->toksuper].parent;
+#else
+                                for (i = parser->toknext - 1; i >= 0; i--) {
+                                        if (tokens[i].type == JSMN_ARRAY || tokens[i].type == JSMN_OBJECT) {
+                                                if (tokens[i].start != -1 && tokens[i].end == -1) {
+                                                        parser->toksuper = i;
+                                                        break;
+                                                }
+                                        }
+                                }
+#endif
+                        }
+                        break;
+#ifdef JSMN_STRICT
+                        /* In strict mode primitives are: numbers and booleans */
+                case '-': case '0': case '1' : case '2': case '3' : case '4':
+                case '5': case '6': case '7' : case '8': case '9':
+                case 't': case 'f': case 'n' :
+                        /* And they must not be keys of the object */
+                        if (tokens != NULL && parser->toksuper != -1) {
+                                jsmntok_t *t = &tokens[parser->toksuper];
+                                if (t->type == JSMN_OBJECT ||
+                                                (t->type == JSMN_STRING && t->size != 0)) {
+                                        return JSMN_ERROR_INVAL;
+                                }
+                        }
+#else
+                        /* In non-strict mode every unquoted value is a primitive */
+                default:
+#endif
+                        r = jsmn_parse_primitive(parser, js, len, tokens, num_tokens);
+                        if (r < 0) return r;
+                        count++;
+                        if (parser->toksuper != -1 && tokens != NULL)
+                                tokens[parser->toksuper].size++;
+                        break;
+
+#ifdef JSMN_STRICT
+                        /* Unexpected char in strict mode */
+                default:
+                        return JSMN_ERROR_INVAL;
+#endif
+                }
+        }
+
+        if (tokens != NULL) {
+                for (i = parser->toknext - 1; i >= 0; i--) {
+                        /* Unmatched opened object or array */
+                        if (tokens[i].start != -1 && tokens[i].end == -1) {
+                                return JSMN_ERROR_PART;
+                        }
+                }
+        }
+
+        return count;
+}
+
+/**
+ * Creates a new parser based over a given  buffer with an array of tokens
+ * available.
+ */
+static void jsmn_init(jsmn_parser *parser) {
+        parser->pos = 0;
+        parser->toknext = 0;
+        parser->toksuper = -1;
+}
+/*
+ * -- jsmn.c end --
+ */
+
+#endif /* #ifdef CGLTF_IMPLEMENTATION */
+
+/* cgltf is distributed under MIT license:
+ *
+ * Copyright (c) 2018 Johannes Kuhlmann
+
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
diff --git a/gfx/contrib/cgltf/cgltf_write.h b/gfx/contrib/cgltf/cgltf_write.h
new file mode 100644
index 0000000..2096a5b
--- /dev/null
+++ b/gfx/contrib/cgltf/cgltf_write.h
@@ -0,0 +1,1173 @@
+/**
+ * cgltf_write - a single-file glTF 2.0 writer written in C99.
+ *
+ * Version: 1.7
+ *
+ * Website: https://github.com/jkuhlmann/cgltf
+ *
+ * Distributed under the MIT License, see notice at the end of this file.
+ *
+ * Building:
+ * Include this file where you need the struct and function
+ * declarations. Have exactly one source file where you define
+ * `CGLTF_WRITE_IMPLEMENTATION` before including this file to get the
+ * function definitions.
+ *
+ * Reference:
+ * `cgltf_result cgltf_write_file(const cgltf_options* options, const char*
+ * path, const cgltf_data* data)` writes JSON to the given file path. Buffer
+ * files and external images are not written out. `data` is not deallocated.
+ *
+ * `cgltf_size cgltf_write(const cgltf_options* options, char* buffer,
+ * cgltf_size size, const cgltf_data* data)` writes JSON into the given memory
+ * buffer. Returns the number of bytes written to `buffer`, including a null
+ * terminator. If buffer is null, returns the number of bytes that would have
+ * been written. `data` is not deallocated.
+ *
+ * To write custom JSON into the `extras` field, aggregate all the custom JSON
+ * into a single buffer, then set `file_data` to this buffer. By supplying
+ * start_offset and end_offset values for various objects, you can select a
+ * range of characters within the aggregated buffer.
+ */
+#ifndef CGLTF_WRITE_H_INCLUDED__
+#define CGLTF_WRITE_H_INCLUDED__
+
+#include "cgltf.h"
+
+#include <stddef.h>
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+cgltf_result cgltf_write_file(const cgltf_options* options, const char* path, const cgltf_data* data);
+cgltf_size cgltf_write(const cgltf_options* options, char* buffer, cgltf_size size, const cgltf_data* data);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* #ifndef CGLTF_WRITE_H_INCLUDED__ */
+
+/*
+ *
+ * Stop now, if you are only interested in the API.
+ * Below, you find the implementation.
+ *
+ */
+
+#if defined(__INTELLISENSE__) || defined(__JETBRAINS_IDE__)
+/* This makes MSVC/CLion intellisense work. */
+#define CGLTF_IMPLEMENTATION
+#endif
+
+#ifdef CGLTF_WRITE_IMPLEMENTATION
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define CGLTF_EXTENSION_FLAG_TEXTURE_TRANSFORM      (1 << 0)
+#define CGLTF_EXTENSION_FLAG_MATERIALS_UNLIT        (1 << 1)
+#define CGLTF_EXTENSION_FLAG_SPECULAR_GLOSSINESS    (1 << 2)
+#define CGLTF_EXTENSION_FLAG_LIGHTS_PUNCTUAL        (1 << 3)
+#define CGLTF_EXTENSION_FLAG_DRACO_MESH_COMPRESSION (1 << 4)
+#define CGLTF_EXTENSION_FLAG_MATERIALS_CLEARCOAT    (1 << 5)
+#define CGLTF_EXTENSION_FLAG_MATERIALS_IOR          (1 << 6)
+#define CGLTF_EXTENSION_FLAG_MATERIALS_SPECULAR     (1 << 7)
+#define CGLTF_EXTENSION_FLAG_MATERIALS_TRANSMISSION (1 << 8)
+
+typedef struct {
+        char* buffer;
+        cgltf_size buffer_size;
+        cgltf_size remaining;
+        char* cursor;
+        cgltf_size tmp;
+        cgltf_size chars_written;
+        const cgltf_data* data;
+        int depth;
+        const char* indent;
+        int needs_comma;
+        uint32_t extension_flags;
+        uint32_t required_extension_flags;
+} cgltf_write_context;
+
+#define CGLTF_MIN(a, b) (a < b ? a : b)
+
+#define CGLTF_SPRINTF(...) { \
+                context->tmp = snprintf ( context->cursor, context->remaining, __VA_ARGS__ ); \
+                context->chars_written += context->tmp; \
+                if (context->cursor) { \
+                        context->cursor += context->tmp; \
+                        context->remaining -= context->tmp; \
+                } }
+
+#define CGLTF_SNPRINTF(length, ...) { \
+                context->tmp = snprintf ( context->cursor, CGLTF_MIN(length + 1, context->remaining), __VA_ARGS__ ); \
+                context->chars_written += length; \
+                if (context->cursor) { \
+                        context->cursor += length; \
+                        context->remaining -= length; \
+                } }
+
+#define CGLTF_WRITE_IDXPROP(label, val, start) if (val) { \
+                cgltf_write_indent(context); \
+                CGLTF_SPRINTF("\"%s\": %d", label, (int) (val - start)); \
+                context->needs_comma = 1; }
+
+#define CGLTF_WRITE_IDXARRPROP(label, dim, vals, start) if (vals) { \
+                cgltf_write_indent(context); \
+                CGLTF_SPRINTF("\"%s\": [", label); \
+                for (int i = 0; i < (int)(dim); ++i) { \
+                        int idx = (int) (vals[i] - start); \
+                        if (i != 0) CGLTF_SPRINTF(","); \
+                        CGLTF_SPRINTF(" %d", idx); \
+                } \
+                CGLTF_SPRINTF(" ]"); \
+                context->needs_comma = 1; }
+
+#define CGLTF_WRITE_TEXTURE_INFO(label, info) if (info.texture) { \
+                cgltf_write_line(context, "\"" label "\": {"); \
+                CGLTF_WRITE_IDXPROP("index", info.texture, context->data->textures); \
+                cgltf_write_intprop(context, "texCoord", info.texcoord, 0); \
+                cgltf_write_floatprop(context, "scale", info.scale, 1.0f); \
+                if (info.has_transform) { \
+                        context->extension_flags |= CGLTF_EXTENSION_FLAG_TEXTURE_TRANSFORM; \
+                        cgltf_write_texture_transform(context, &info.transform); \
+                } \
+                cgltf_write_extras(context, &info.extras); \
+                cgltf_write_line(context, "}"); }
+
+static void cgltf_write_indent(cgltf_write_context* context)
+{
+        if (context->needs_comma)
+        {
+                CGLTF_SPRINTF(",\n");
+                context->needs_comma = 0;
+        }
+        else
+        {
+                CGLTF_SPRINTF("\n");
+        }
+        for (int i = 0; i < context->depth; ++i)
+        {
+                CGLTF_SPRINTF("%s", context->indent);
+        }
+}
+
+static void cgltf_write_line(cgltf_write_context* context, const char* line)
+{
+        if (line[0] == ']' || line[0] == '}')
+        {
+                --context->depth;
+                context->needs_comma = 0;
+        }
+        cgltf_write_indent(context);
+        CGLTF_SPRINTF("%s", line);
+        cgltf_size last = (cgltf_size)(strlen(line) - 1);
+        if (line[0] == ']' || line[0] == '}')
+        {
+                context->needs_comma = 1;
+        }
+        if (line[last] == '[' || line[last] == '{')
+        {
+                ++context->depth;
+                context->needs_comma = 0;
+        }
+}
+
+static void cgltf_write_strprop(cgltf_write_context* context, const char* label, const char* val)
+{
+        if (val)
+        {
+                cgltf_write_indent(context);
+                CGLTF_SPRINTF("\"%s\": \"%s\"", label, val);
+                context->needs_comma = 1;
+        }
+}
+
+static void cgltf_write_extras(cgltf_write_context* context, const cgltf_extras* extras)
+{
+        cgltf_size length = extras->end_offset - extras->start_offset;
+        if (length > 0 && context->data->file_data)
+        {
+                char* json_string = ((char*) context->data->file_data) + extras->start_offset;
+                cgltf_write_indent(context);
+                CGLTF_SPRINTF("%s", "\"extras\": ");
+                CGLTF_SNPRINTF(length, "%s", json_string);
+                context->needs_comma = 1;
+        }
+}
+
+static void cgltf_write_stritem(cgltf_write_context* context, const char* item)
+{
+        cgltf_write_indent(context);
+        CGLTF_SPRINTF("\"%s\"", item);
+        context->needs_comma = 1;
+}
+
+static void cgltf_write_intprop(cgltf_write_context* context, const char* label, int val, int def)
+{
+        if (val != def)
+        {
+                cgltf_write_indent(context);
+                CGLTF_SPRINTF("\"%s\": %d", label, val);
+                context->needs_comma = 1;
+        }
+}
+
+static void cgltf_write_floatprop(cgltf_write_context* context, const char* label, float val, float def)
+{
+        if (val != def)
+        {
+                cgltf_write_indent(context);
+                CGLTF_SPRINTF("\"%s\": ", label);
+                CGLTF_SPRINTF("%g", val);
+                context->needs_comma = 1;
+
+                if (context->cursor)
+                {
+                        char *decimal_comma = strchr(context->cursor - context->tmp, ',');
+                        if (decimal_comma)
+                        {
+                                *decimal_comma = '.';
+                        }
+                }
+        }
+}
+
+static void cgltf_write_boolprop_optional(cgltf_write_context* context, const char* label, bool val, bool def)
+{
+        if (val != def)
+        {
+                cgltf_write_indent(context);
+                CGLTF_SPRINTF("\"%s\": %s", label, val ? "true" : "false");
+                context->needs_comma = 1;
+        }
+}
+
+static void cgltf_write_floatarrayprop(cgltf_write_context* context, const char* label, const cgltf_float* vals, cgltf_size dim)
+{
+        cgltf_write_indent(context);
+        CGLTF_SPRINTF("\"%s\": [", label);
+        for (cgltf_size i = 0; i < dim; ++i)
+        {
+                if (i != 0)
+                {
+                        CGLTF_SPRINTF(", %g", vals[i]);
+                }
+                else
+                {
+                        CGLTF_SPRINTF("%g", vals[i]);
+                }
+        }
+        CGLTF_SPRINTF("]");
+        context->needs_comma = 1;
+}
+
+static bool cgltf_check_floatarray(const float* vals, int dim, float val) {
+        while (dim--)
+        {
+                if (vals[dim] != val)
+                {
+                        return true;
+                }
+        }
+        return false;
+}
+
+static int cgltf_int_from_component_type(cgltf_component_type ctype)
+{
+        switch (ctype)
+        {
+                case cgltf_component_type_r_8: return 5120;
+                case cgltf_component_type_r_8u: return 5121;
+                case cgltf_component_type_r_16: return 5122;
+                case cgltf_component_type_r_16u: return 5123;
+                case cgltf_component_type_r_32u: return 5125;
+                case cgltf_component_type_r_32f: return 5126;
+                default: return 0;
+        }
+}
+
+static const char* cgltf_str_from_alpha_mode(cgltf_alpha_mode alpha_mode)
+{
+        switch (alpha_mode)
+        {
+                case cgltf_alpha_mode_mask: return "MASK";
+                case cgltf_alpha_mode_blend: return "BLEND";
+                default: return NULL;
+        }
+}
+
+static const char* cgltf_str_from_type(cgltf_type type)
+{
+        switch (type)
+        {
+                case cgltf_type_scalar: return "SCALAR";
+                case cgltf_type_vec2: return "VEC2";
+                case cgltf_type_vec3: return "VEC3";
+                case cgltf_type_vec4: return "VEC4";
+                case cgltf_type_mat2: return "MAT2";
+                case cgltf_type_mat3: return "MAT3";
+                case cgltf_type_mat4: return "MAT4";
+                default: return NULL;
+        }
+}
+
+static cgltf_size cgltf_dim_from_type(cgltf_type type)
+{
+        switch (type)
+        {
+                case cgltf_type_scalar: return 1;
+                case cgltf_type_vec2: return 2;
+                case cgltf_type_vec3: return 3;
+                case cgltf_type_vec4: return 4;
+                case cgltf_type_mat2: return 4;
+                case cgltf_type_mat3: return 9;
+                case cgltf_type_mat4: return 16;
+                default: return 0;
+        }
+}
+
+static const char* cgltf_str_from_camera_type(cgltf_camera_type camera_type)
+{
+        switch (camera_type)
+        {
+                case cgltf_camera_type_perspective: return "perspective";
+                case cgltf_camera_type_orthographic: return "orthographic";
+                default: return NULL;
+        }
+}
+
+static const char* cgltf_str_from_light_type(cgltf_light_type light_type)
+{
+        switch (light_type)
+        {
+                case cgltf_light_type_directional: return "directional";
+                case cgltf_light_type_point: return "point";
+                case cgltf_light_type_spot: return "spot";
+                default: return NULL;
+        }
+}
+
+static void cgltf_write_texture_transform(cgltf_write_context* context, const cgltf_texture_transform* transform)
+{
+        cgltf_write_line(context, "\"extensions\": {");
+        cgltf_write_line(context, "\"KHR_texture_transform\": {");
+        if (cgltf_check_floatarray(transform->offset, 2, 0.0f))
+        {
+                cgltf_write_floatarrayprop(context, "offset", transform->offset, 2);
+        }
+        cgltf_write_floatprop(context, "rotation", transform->rotation, 0.0f);
+        if (cgltf_check_floatarray(transform->scale, 2, 1.0f))
+        {
+                cgltf_write_floatarrayprop(context, "scale", transform->scale, 2);
+        }
+        cgltf_write_intprop(context, "texCoord", transform->texcoord, 0);
+        cgltf_write_line(context, "}");
+        cgltf_write_line(context, "}");
+}
+
+static void cgltf_write_asset(cgltf_write_context* context, const cgltf_asset* asset)
+{
+        cgltf_write_line(context, "\"asset\": {");
+        cgltf_write_strprop(context, "copyright", asset->copyright);
+        cgltf_write_strprop(context, "generator", asset->generator);
+        cgltf_write_strprop(context, "version", asset->version);
+        cgltf_write_strprop(context, "min_version", asset->min_version);
+        cgltf_write_extras(context, &asset->extras);
+        cgltf_write_line(context, "}");
+}
+
+static void cgltf_write_primitive(cgltf_write_context* context, const cgltf_primitive* prim)
+{
+        cgltf_write_intprop(context, "mode", (int) prim->type, 4);
+        CGLTF_WRITE_IDXPROP("indices", prim->indices, context->data->accessors);
+        CGLTF_WRITE_IDXPROP("material", prim->material, context->data->materials);
+        cgltf_write_line(context, "\"attributes\": {");
+        for (cgltf_size i = 0; i < prim->attributes_count; ++i)
+        {
+                const cgltf_attribute* attr = prim->attributes + i;
+                CGLTF_WRITE_IDXPROP(attr->name, attr->data, context->data->accessors);
+        }
+        cgltf_write_line(context, "}");
+
+        if (prim->targets_count)
+        {
+                cgltf_write_line(context, "\"targets\": [");
+                for (cgltf_size i = 0; i < prim->targets_count; ++i)
+                {
+                        cgltf_write_line(context, "{");
+                        for (cgltf_size j = 0; j < prim->targets[i].attributes_count; ++j)
+                        {
+                                const cgltf_attribute* attr = prim->targets[i].attributes + j;
+                                CGLTF_WRITE_IDXPROP(attr->name, attr->data, context->data->accessors);
+                        }
+                        cgltf_write_line(context, "}");
+                }
+                cgltf_write_line(context, "]");
+        }
+        cgltf_write_extras(context, &prim->extras);
+
+        cgltf_bool has_extensions = prim->has_draco_mesh_compression;
+        if (has_extensions) {
+                cgltf_write_line(context, "\"extensions\": {");
+
+                if (prim->has_draco_mesh_compression) {
+                        context->extension_flags |= CGLTF_EXTENSION_FLAG_DRACO_MESH_COMPRESSION;
+                        if (prim->attributes_count == 0 || prim->indices == 0) {
+                                context->required_extension_flags |= CGLTF_EXTENSION_FLAG_DRACO_MESH_COMPRESSION;                                
+                        }
+
+                        cgltf_write_line(context, "\"KHR_draco_mesh_compression\": {");
+                        CGLTF_WRITE_IDXPROP("bufferView", prim->draco_mesh_compression.buffer_view, context->data->buffer_views);
+                        cgltf_write_line(context, "\"attributes\": {");
+                        for (cgltf_size i = 0; i < prim->draco_mesh_compression.attributes_count; ++i)
+                        {
+                                const cgltf_attribute* attr = prim->draco_mesh_compression.attributes + i;
+                                CGLTF_WRITE_IDXPROP(attr->name, attr->data, context->data->accessors);
+                        }
+                        cgltf_write_line(context, "}");
+                        cgltf_write_line(context, "}");
+                }
+
+                cgltf_write_line(context, "}");
+        }
+}
+
+static void cgltf_write_mesh(cgltf_write_context* context, const cgltf_mesh* mesh)
+{
+        cgltf_write_line(context, "{");
+        cgltf_write_strprop(context, "name", mesh->name);
+
+        cgltf_write_line(context, "\"primitives\": [");
+        for (cgltf_size i = 0; i < mesh->primitives_count; ++i)
+        {
+                cgltf_write_line(context, "{");
+                cgltf_write_primitive(context, mesh->primitives + i);
+                cgltf_write_line(context, "}");
+        }
+        cgltf_write_line(context, "]");
+
+        if (mesh->weights_count > 0)
+        {
+                cgltf_write_floatarrayprop(context, "weights", mesh->weights, mesh->weights_count);
+        }
+        cgltf_write_extras(context, &mesh->extras);
+        cgltf_write_line(context, "}");
+}
+
+static void cgltf_write_buffer_view(cgltf_write_context* context, const cgltf_buffer_view* view)
+{
+        cgltf_write_line(context, "{");
+        CGLTF_WRITE_IDXPROP("buffer", view->buffer, context->data->buffers);
+        cgltf_write_intprop(context, "byteLength", (int)view->size, -1);
+        cgltf_write_intprop(context, "byteOffset", (int)view->offset, 0);
+        cgltf_write_intprop(context, "byteStride", (int)view->stride, 0);
+        // NOTE: We skip writing "target" because the spec says its usage can be inferred.
+        cgltf_write_extras(context, &view->extras);
+        cgltf_write_line(context, "}");
+}
+
+
+static void cgltf_write_buffer(cgltf_write_context* context, const cgltf_buffer* buffer)
+{
+        cgltf_write_line(context, "{");
+        cgltf_write_strprop(context, "uri", buffer->uri);
+        cgltf_write_intprop(context, "byteLength", (int)buffer->size, -1);
+        cgltf_write_extras(context, &buffer->extras);
+        cgltf_write_line(context, "}");
+}
+
+static void cgltf_write_material(cgltf_write_context* context, const cgltf_material* material)
+{
+        cgltf_write_line(context, "{");
+        cgltf_write_strprop(context, "name", material->name);
+        cgltf_write_floatprop(context, "alphaCutoff", material->alpha_cutoff, 0.5f);
+        cgltf_write_boolprop_optional(context, "doubleSided", material->double_sided, false);
+        // cgltf_write_boolprop_optional(context, "unlit", material->unlit, false);
+
+        if (material->unlit)
+        {
+                context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_UNLIT;
+        }
+
+        if (material->has_pbr_specular_glossiness)
+        {
+                context->extension_flags |= CGLTF_EXTENSION_FLAG_SPECULAR_GLOSSINESS;
+        }
+
+        if (material->has_clearcoat)
+        {
+                context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_CLEARCOAT;
+        }
+
+        if (material->has_transmission)
+        {
+                context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_TRANSMISSION;
+        }
+
+        if (material->has_ior)
+        {
+                context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_IOR;
+        }
+
+        if (material->has_specular)
+        {
+                context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_SPECULAR;
+        }
+
+        if (material->has_pbr_metallic_roughness)
+        {
+                const cgltf_pbr_metallic_roughness* params = &material->pbr_metallic_roughness;
+                cgltf_write_line(context, "\"pbrMetallicRoughness\": {");
+                CGLTF_WRITE_TEXTURE_INFO("baseColorTexture", params->base_color_texture);
+                CGLTF_WRITE_TEXTURE_INFO("metallicRoughnessTexture", params->metallic_roughness_texture);
+                cgltf_write_floatprop(context, "metallicFactor", params->metallic_factor, 1.0f);
+                cgltf_write_floatprop(context, "roughnessFactor", params->roughness_factor, 1.0f);
+                if (cgltf_check_floatarray(params->base_color_factor, 4, 1.0f))
+                {
+                        cgltf_write_floatarrayprop(context, "baseColorFactor", params->base_color_factor, 4);
+                }
+                cgltf_write_extras(context, &params->extras);
+                cgltf_write_line(context, "}");
+        }
+
+        if (material->unlit || material->has_pbr_specular_glossiness || material->has_clearcoat || material->has_ior || material->has_specular || material->has_transmission)
+        {
+                cgltf_write_line(context, "\"extensions\": {");
+                if (material->has_clearcoat)
+                {
+                        const cgltf_clearcoat* params = &material->clearcoat;
+                        cgltf_write_line(context, "\"KHR_materials_clearcoat\": {");
+                        CGLTF_WRITE_TEXTURE_INFO("clearcoatTexture", params->clearcoat_texture);
+                        CGLTF_WRITE_TEXTURE_INFO("clearcoatRoughnessTexture", params->clearcoat_roughness_texture);
+                        CGLTF_WRITE_TEXTURE_INFO("clearcoatNormalTexture", params->clearcoat_normal_texture);
+                        cgltf_write_floatprop(context, "clearcoatFactor", params->clearcoat_factor, 0.0f);
+                        cgltf_write_floatprop(context, "clearcoatRoughnessFactor", params->clearcoat_roughness_factor, 0.0f);
+                        cgltf_write_line(context, "}");
+                }
+                if (material->has_ior)
+                {
+                        const cgltf_ior* params = &material->ior;
+                        cgltf_write_line(context, "\"KHR_materials_ior\": {");
+                        cgltf_write_floatprop(context, "ior", params->ior, 1.5f);
+                        cgltf_write_line(context, "}");
+                }
+                if (material->has_specular)
+                {
+                        const cgltf_specular* params = &material->specular;
+                        cgltf_write_line(context, "\"KHR_materials_specular\": {");
+                        CGLTF_WRITE_TEXTURE_INFO("specularTexture", params->specular_texture);
+                        cgltf_write_floatprop(context, "specularFactor", params->specular_factor, 1.0f);
+                        if (cgltf_check_floatarray(params->specular_color_factor, 3, 1.0f))
+                        {
+                                cgltf_write_floatarrayprop(context, "specularColorFactor", params->specular_color_factor, 3);
+                        }
+                        cgltf_write_line(context, "}");
+                }
+                if (material->has_transmission)
+                {
+                        const cgltf_transmission* params = &material->transmission;
+                        cgltf_write_line(context, "\"KHR_materials_transmission\": {");
+                        CGLTF_WRITE_TEXTURE_INFO("transmissionTexture", params->transmission_texture);
+                        cgltf_write_floatprop(context, "transmissionFactor", params->transmission_factor, 0.0f);
+                        cgltf_write_line(context, "}");
+                }
+                if (material->has_pbr_specular_glossiness)
+                {
+                        const cgltf_pbr_specular_glossiness* params = &material->pbr_specular_glossiness;
+                        cgltf_write_line(context, "\"KHR_materials_pbrSpecularGlossiness\": {");
+                        CGLTF_WRITE_TEXTURE_INFO("diffuseTexture", params->diffuse_texture);
+                        CGLTF_WRITE_TEXTURE_INFO("specularGlossinessTexture", params->specular_glossiness_texture);
+                        if (cgltf_check_floatarray(params->diffuse_factor, 4, 1.0f))
+                        {
+                                cgltf_write_floatarrayprop(context, "dffuseFactor", params->diffuse_factor, 4);
+                        }
+                        if (cgltf_check_floatarray(params->specular_factor, 3, 1.0f))
+                        {
+                                cgltf_write_floatarrayprop(context, "specularFactor", params->specular_factor, 3);
+                        }
+                        cgltf_write_floatprop(context, "glossinessFactor", params->glossiness_factor, 1.0f);
+                        cgltf_write_line(context, "}");
+                }
+                if (material->unlit)
+                {
+                        cgltf_write_line(context, "\"KHR_materials_unlit\": {}");
+                }
+                cgltf_write_line(context, "}");
+        }
+
+        CGLTF_WRITE_TEXTURE_INFO("normalTexture", material->normal_texture);
+        CGLTF_WRITE_TEXTURE_INFO("occlusionTexture", material->occlusion_texture);
+        CGLTF_WRITE_TEXTURE_INFO("emissiveTexture", material->emissive_texture);
+        if (cgltf_check_floatarray(material->emissive_factor, 3, 0.0f))
+        {
+                cgltf_write_floatarrayprop(context, "emissiveFactor", material->emissive_factor, 3);
+        }
+        cgltf_write_strprop(context, "alphaMode", cgltf_str_from_alpha_mode(material->alpha_mode));
+        cgltf_write_extras(context, &material->extras);
+        cgltf_write_line(context, "}");
+}
+
+static void cgltf_write_image(cgltf_write_context* context, const cgltf_image* image)
+{
+        cgltf_write_line(context, "{");
+        cgltf_write_strprop(context, "name", image->name);
+        cgltf_write_strprop(context, "uri", image->uri);
+        CGLTF_WRITE_IDXPROP("bufferView", image->buffer_view, context->data->buffer_views);
+        cgltf_write_strprop(context, "mimeType", image->mime_type);
+        cgltf_write_extras(context, &image->extras);
+        cgltf_write_line(context, "}");
+}
+
+static void cgltf_write_texture(cgltf_write_context* context, const cgltf_texture* texture)
+{
+        cgltf_write_line(context, "{");
+        cgltf_write_strprop(context, "name", texture->name);
+        CGLTF_WRITE_IDXPROP("source", texture->image, context->data->images);
+        CGLTF_WRITE_IDXPROP("sampler", texture->sampler, context->data->samplers);
+        cgltf_write_extras(context, &texture->extras);
+        cgltf_write_line(context, "}");
+}
+
+static void cgltf_write_skin(cgltf_write_context* context, const cgltf_skin* skin)
+{
+        cgltf_write_line(context, "{");
+        CGLTF_WRITE_IDXPROP("skeleton", skin->skeleton, context->data->nodes);
+        CGLTF_WRITE_IDXPROP("inverseBindMatrices", skin->inverse_bind_matrices, context->data->accessors);
+        CGLTF_WRITE_IDXARRPROP("joints", skin->joints_count, skin->joints, context->data->nodes);
+        cgltf_write_strprop(context, "name", skin->name);
+        cgltf_write_extras(context, &skin->extras);
+        cgltf_write_line(context, "}");
+}
+
+static const char* cgltf_write_str_path_type(cgltf_animation_path_type path_type)
+{
+        switch (path_type)
+        {
+        case cgltf_animation_path_type_translation:
+                return "translation";
+        case cgltf_animation_path_type_rotation:
+                return "rotation";
+        case cgltf_animation_path_type_scale:
+                return "scale";
+        case cgltf_animation_path_type_weights:
+                return "weights";
+        case cgltf_animation_path_type_invalid:
+                break;
+        }
+        return "invalid";
+}
+
+static const char* cgltf_write_str_interpolation_type(cgltf_interpolation_type interpolation_type)
+{
+        switch (interpolation_type)
+        {
+        case cgltf_interpolation_type_linear:
+                return "LINEAR";
+        case cgltf_interpolation_type_step:
+                return "STEP";
+        case cgltf_interpolation_type_cubic_spline:
+                return "CUBICSPLINE";
+        }
+        return "invalid";
+}
+
+static void cgltf_write_path_type(cgltf_write_context* context, const char *label, cgltf_animation_path_type path_type)
+{
+        cgltf_write_strprop(context, label, cgltf_write_str_path_type(path_type));
+}
+
+static void cgltf_write_interpolation_type(cgltf_write_context* context, const char *label, cgltf_interpolation_type interpolation_type)
+{
+        cgltf_write_strprop(context, label, cgltf_write_str_interpolation_type(interpolation_type));
+}
+
+static void cgltf_write_animation_sampler(cgltf_write_context* context, const cgltf_animation_sampler* animation_sampler)
+{
+        cgltf_write_line(context, "{");
+        cgltf_write_interpolation_type(context, "interpolation", animation_sampler->interpolation);
+        CGLTF_WRITE_IDXPROP("input", animation_sampler->input, context->data->accessors);
+        CGLTF_WRITE_IDXPROP("output", animation_sampler->output, context->data->accessors);
+        cgltf_write_extras(context, &animation_sampler->extras);
+        cgltf_write_line(context, "}");
+}
+
+static void cgltf_write_animation_channel(cgltf_write_context* context, const cgltf_animation* animation, const cgltf_animation_channel* animation_channel)
+{
+        cgltf_write_line(context, "{");
+        CGLTF_WRITE_IDXPROP("sampler", animation_channel->sampler, animation->samplers);
+        cgltf_write_line(context, "\"target\": {");
+        CGLTF_WRITE_IDXPROP("node", animation_channel->target_node, context->data->nodes);
+        cgltf_write_path_type(context, "path", animation_channel->target_path);
+        cgltf_write_line(context, "}");
+        cgltf_write_extras(context, &animation_channel->extras);
+        cgltf_write_line(context, "}");
+}
+
+static void cgltf_write_animation(cgltf_write_context* context, const cgltf_animation* animation)
+{
+        cgltf_write_line(context, "{");
+        cgltf_write_strprop(context, "name", animation->name);
+
+        if (animation->samplers_count > 0)
+        {
+                cgltf_write_line(context, "\"samplers\": [");
+                for (cgltf_size i = 0; i < animation->samplers_count; ++i)
+                {
+                        cgltf_write_animation_sampler(context, animation->samplers + i);
+                }
+                cgltf_write_line(context, "]");
+        }
+        if (animation->channels_count > 0)
+        {
+                cgltf_write_line(context, "\"channels\": [");
+                for (cgltf_size i = 0; i < animation->channels_count; ++i)
+                {
+                        cgltf_write_animation_channel(context, animation, animation->channels + i);
+                }
+                cgltf_write_line(context, "]");
+        }
+        cgltf_write_extras(context, &animation->extras);
+        cgltf_write_line(context, "}");
+}
+
+static void cgltf_write_sampler(cgltf_write_context* context, const cgltf_sampler* sampler)
+{
+        cgltf_write_line(context, "{");
+        cgltf_write_intprop(context, "magFilter", sampler->mag_filter, 0);
+        cgltf_write_intprop(context, "minFilter", sampler->min_filter, 0);
+        cgltf_write_intprop(context, "wrapS", sampler->wrap_s, 10497);
+        cgltf_write_intprop(context, "wrapT", sampler->wrap_t, 10497);
+        cgltf_write_extras(context, &sampler->extras);
+        cgltf_write_line(context, "}");
+}
+
+static void cgltf_write_node(cgltf_write_context* context, const cgltf_node* node)
+{
+        cgltf_write_line(context, "{");
+        CGLTF_WRITE_IDXARRPROP("children", node->children_count, node->children, context->data->nodes);
+        CGLTF_WRITE_IDXPROP("mesh", node->mesh, context->data->meshes);
+        cgltf_write_strprop(context, "name", node->name);
+        if (node->has_matrix)
+        {
+                cgltf_write_floatarrayprop(context, "matrix", node->matrix, 16);
+        }
+        if (node->has_translation)
+        {
+                cgltf_write_floatarrayprop(context, "translation", node->translation, 3);
+        }
+        if (node->has_rotation)
+        {
+                cgltf_write_floatarrayprop(context, "rotation", node->rotation, 4);
+        }
+        if (node->has_scale)
+        {
+                cgltf_write_floatarrayprop(context, "scale", node->scale, 3);
+        }
+        if (node->skin)
+        {
+                CGLTF_WRITE_IDXPROP("skin", node->skin, context->data->skins);
+        }
+
+        if (node->light)
+        {
+                context->extension_flags |= CGLTF_EXTENSION_FLAG_LIGHTS_PUNCTUAL;
+                cgltf_write_line(context, "\"extensions\": {");
+                cgltf_write_line(context, "\"KHR_lights_punctual\": {");
+                CGLTF_WRITE_IDXPROP("light", node->light, context->data->lights);
+                cgltf_write_line(context, "}");
+                cgltf_write_line(context, "}");
+        }
+
+        if (node->weights_count > 0)
+        {
+                cgltf_write_floatarrayprop(context, "weights", node->weights, node->weights_count);
+        }
+
+        if (node->camera)
+        {
+                CGLTF_WRITE_IDXPROP("camera", node->camera, context->data->cameras);
+        }
+
+        cgltf_write_extras(context, &node->extras);
+        cgltf_write_line(context, "}");
+}
+
+static void cgltf_write_scene(cgltf_write_context* context, const cgltf_scene* scene)
+{
+        cgltf_write_line(context, "{");
+        cgltf_write_strprop(context, "name", scene->name);
+        CGLTF_WRITE_IDXARRPROP("nodes", scene->nodes_count, scene->nodes, context->data->nodes);
+        cgltf_write_extras(context, &scene->extras);
+        cgltf_write_line(context, "}");
+}
+
+static void cgltf_write_accessor(cgltf_write_context* context, const cgltf_accessor* accessor)
+{
+        cgltf_write_line(context, "{");
+        CGLTF_WRITE_IDXPROP("bufferView", accessor->buffer_view, context->data->buffer_views);
+        cgltf_write_intprop(context, "componentType", cgltf_int_from_component_type(accessor->component_type), 0);
+        cgltf_write_strprop(context, "type", cgltf_str_from_type(accessor->type));
+        cgltf_size dim = cgltf_dim_from_type(accessor->type);
+        cgltf_write_boolprop_optional(context, "normalized", accessor->normalized, false);
+        cgltf_write_intprop(context, "byteOffset", (int)accessor->offset, 0);
+        cgltf_write_intprop(context, "count", (int)accessor->count, -1);
+        if (accessor->has_min)
+        {
+                cgltf_write_floatarrayprop(context, "min", accessor->min, dim);
+        }
+        if (accessor->has_max)
+        {
+                cgltf_write_floatarrayprop(context, "max", accessor->max, dim);
+        }
+        if (accessor->is_sparse)
+        {
+                cgltf_write_line(context, "\"sparse\": {");
+                cgltf_write_intprop(context, "count", (int)accessor->sparse.count, 0);
+                cgltf_write_line(context, "\"indices\": {");
+                cgltf_write_intprop(context, "byteOffset", (int)accessor->sparse.indices_byte_offset, 0);
+                CGLTF_WRITE_IDXPROP("bufferView", accessor->sparse.indices_buffer_view, context->data->buffer_views);
+                cgltf_write_intprop(context, "componentType", cgltf_int_from_component_type(accessor->sparse.indices_component_type), 0);
+                cgltf_write_extras(context, &accessor->sparse.indices_extras);
+                cgltf_write_line(context, "}");
+                cgltf_write_line(context, "\"values\": {");
+                cgltf_write_intprop(context, "byteOffset", (int)accessor->sparse.values_byte_offset, 0);
+                CGLTF_WRITE_IDXPROP("bufferView", accessor->sparse.values_buffer_view, context->data->buffer_views);
+                cgltf_write_extras(context, &accessor->sparse.values_extras);
+                cgltf_write_line(context, "}");
+                cgltf_write_extras(context, &accessor->sparse.extras);
+                cgltf_write_line(context, "}");
+        }
+        cgltf_write_extras(context, &accessor->extras);
+        cgltf_write_line(context, "}");
+}
+
+static void cgltf_write_camera(cgltf_write_context* context, const cgltf_camera* camera)
+{
+        cgltf_write_line(context, "{");
+        cgltf_write_strprop(context, "type", cgltf_str_from_camera_type(camera->type));
+        if (camera->name)
+        {
+                cgltf_write_strprop(context, "name", camera->name);
+        }
+
+        if (camera->type == cgltf_camera_type_orthographic)
+        {
+                cgltf_write_line(context, "\"orthographic\": {");
+                cgltf_write_floatprop(context, "xmag", camera->data.orthographic.xmag, -1.0f);
+                cgltf_write_floatprop(context, "ymag", camera->data.orthographic.ymag, -1.0f);
+                cgltf_write_floatprop(context, "zfar", camera->data.orthographic.zfar, -1.0f);
+                cgltf_write_floatprop(context, "znear", camera->data.orthographic.znear, -1.0f);
+                cgltf_write_extras(context, &camera->data.orthographic.extras);
+                cgltf_write_line(context, "}");
+        }
+        else if (camera->type == cgltf_camera_type_perspective)
+        {
+                cgltf_write_line(context, "\"perspective\": {");
+                cgltf_write_floatprop(context, "aspectRatio", camera->data.perspective.aspect_ratio, -1.0f);
+                cgltf_write_floatprop(context, "yfov", camera->data.perspective.yfov, -1.0f);
+                cgltf_write_floatprop(context, "zfar", camera->data.perspective.zfar, -1.0f);
+                cgltf_write_floatprop(context, "znear", camera->data.perspective.znear, -1.0f);
+                cgltf_write_extras(context, &camera->data.perspective.extras);
+                cgltf_write_line(context, "}");
+        }
+        cgltf_write_extras(context, &camera->extras);
+        cgltf_write_line(context, "}");
+}
+
+static void cgltf_write_light(cgltf_write_context* context, const cgltf_light* light)
+{
+        cgltf_write_line(context, "{");
+        cgltf_write_strprop(context, "type", cgltf_str_from_light_type(light->type));
+        if (light->name)
+        {
+                cgltf_write_strprop(context, "name", light->name);
+        }
+        if (cgltf_check_floatarray(light->color, 3, 1.0f))
+        {
+                cgltf_write_floatarrayprop(context, "color", light->color, 3);
+        }
+        cgltf_write_floatprop(context, "intensity", light->intensity, 1.0f);
+        cgltf_write_floatprop(context, "range", light->range, 0.0f);
+
+        if (light->type == cgltf_light_type_spot)
+        {
+                cgltf_write_line(context, "\"spot\": {");
+                cgltf_write_floatprop(context, "innerConeAngle", light->spot_inner_cone_angle, 0.0f);
+                cgltf_write_floatprop(context, "outerConeAngle", light->spot_outer_cone_angle, 3.14159265358979323846f/4.0f);
+                cgltf_write_line(context, "}");
+        }
+        cgltf_write_line(context, "}");
+}
+
+cgltf_result cgltf_write_file(const cgltf_options* options, const char* path, const cgltf_data* data)
+{
+        cgltf_size expected = cgltf_write(options, NULL, 0, data);
+        char* buffer = (char*) malloc(expected);
+        cgltf_size actual = cgltf_write(options, buffer, expected, data);
+        if (expected != actual) {
+                fprintf(stderr, "Error: expected %zu bytes but wrote %zu bytes.\n", expected, actual);
+        }
+        FILE* file = fopen(path, "wt");
+        if (!file)
+        {
+                return cgltf_result_file_not_found;
+        }
+        // Note that cgltf_write() includes a null terminator, which we omit from the file content.
+        fwrite(buffer, actual - 1, 1, file);
+        fclose(file);
+        free(buffer);
+        return cgltf_result_success;
+}
+
+static void cgltf_write_extensions(cgltf_write_context* context, uint32_t extension_flags)
+{
+        if (extension_flags & CGLTF_EXTENSION_FLAG_TEXTURE_TRANSFORM) {
+                cgltf_write_stritem(context, "KHR_texture_transform");
+        }
+        if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_UNLIT) {
+                cgltf_write_stritem(context, "KHR_materials_unlit");
+        }
+        if (extension_flags & CGLTF_EXTENSION_FLAG_SPECULAR_GLOSSINESS) {
+                cgltf_write_stritem(context, "KHR_materials_pbrSpecularGlossiness");
+        }
+        if (extension_flags & CGLTF_EXTENSION_FLAG_LIGHTS_PUNCTUAL) {
+                cgltf_write_stritem(context, "KHR_lights_punctual");
+        }
+        if (extension_flags & CGLTF_EXTENSION_FLAG_DRACO_MESH_COMPRESSION) {
+                cgltf_write_stritem(context, "KHR_draco_mesh_compression");
+        }
+        if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_CLEARCOAT) {
+                cgltf_write_stritem(context, "KHR_materials_clearcoat");
+        }
+        if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_IOR) {
+                cgltf_write_stritem(context, "KHR_materials_ior");
+        }
+        if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_SPECULAR) {
+                cgltf_write_stritem(context, "KHR_materials_specular");
+        }
+        if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_TRANSMISSION) {
+                cgltf_write_stritem(context, "KHR_materials_transmission");
+        }
+}
+
+cgltf_size cgltf_write(const cgltf_options* options, char* buffer, cgltf_size size, const cgltf_data* data)
+{
+        (void)options;
+        cgltf_write_context ctx;
+        ctx.buffer = buffer;
+        ctx.buffer_size = size;
+        ctx.remaining = size;
+        ctx.cursor = buffer;
+        ctx.chars_written = 0;
+        ctx.data = data;
+        ctx.depth = 1;
+        ctx.indent = "  ";
+        ctx.needs_comma = 0;
+        ctx.extension_flags = 0;
+        ctx.required_extension_flags = 0;
+
+        cgltf_write_context* context = &ctx;
+
+        CGLTF_SPRINTF("{");
+
+        if (data->accessors_count > 0)
+        {
+                cgltf_write_line(context, "\"accessors\": [");
+                for (cgltf_size i = 0; i < data->accessors_count; ++i)
+                {
+                        cgltf_write_accessor(context, data->accessors + i);
+                }
+                cgltf_write_line(context, "]");
+        }
+
+        cgltf_write_asset(context, &data->asset);
+
+        if (data->buffer_views_count > 0)
+        {
+                cgltf_write_line(context, "\"bufferViews\": [");
+                for (cgltf_size i = 0; i < data->buffer_views_count; ++i)
+                {
+                        cgltf_write_buffer_view(context, data->buffer_views + i);
+                }
+                cgltf_write_line(context, "]");
+        }
+
+        if (data->buffers_count > 0)
+        {
+                cgltf_write_line(context, "\"buffers\": [");
+                for (cgltf_size i = 0; i < data->buffers_count; ++i)
+                {
+                        cgltf_write_buffer(context, data->buffers + i);
+                }
+                cgltf_write_line(context, "]");
+        }
+
+        if (data->images_count > 0)
+        {
+                cgltf_write_line(context, "\"images\": [");
+                for (cgltf_size i = 0; i < data->images_count; ++i)
+                {
+                        cgltf_write_image(context, data->images + i);
+                }
+                cgltf_write_line(context, "]");
+        }
+
+        if (data->meshes_count > 0)
+        {
+                cgltf_write_line(context, "\"meshes\": [");
+                for (cgltf_size i = 0; i < data->meshes_count; ++i)
+                {
+                        cgltf_write_mesh(context, data->meshes + i);
+                }
+                cgltf_write_line(context, "]");
+        }
+
+        if (data->materials_count > 0)
+        {
+                cgltf_write_line(context, "\"materials\": [");
+                for (cgltf_size i = 0; i < data->materials_count; ++i)
+                {
+                        cgltf_write_material(context, data->materials + i);
+                }
+                cgltf_write_line(context, "]");
+        }
+
+        if (data->nodes_count > 0)
+        {
+                cgltf_write_line(context, "\"nodes\": [");
+                for (cgltf_size i = 0; i < data->nodes_count; ++i)
+                {
+                        cgltf_write_node(context, data->nodes + i);
+                }
+                cgltf_write_line(context, "]");
+        }
+
+        if (data->samplers_count > 0)
+        {
+                cgltf_write_line(context, "\"samplers\": [");
+                for (cgltf_size i = 0; i < data->samplers_count; ++i)
+                {
+                        cgltf_write_sampler(context, data->samplers + i);
+                }
+                cgltf_write_line(context, "]");
+        }
+
+        CGLTF_WRITE_IDXPROP("scene", data->scene, data->scenes);
+
+        if (data->scenes_count > 0)
+        {
+                cgltf_write_line(context, "\"scenes\": [");
+                for (cgltf_size i = 0; i < data->scenes_count; ++i)
+                {
+                        cgltf_write_scene(context, data->scenes + i);
+                }
+                cgltf_write_line(context, "]");
+        }
+
+        if (data->textures_count > 0)
+        {
+                cgltf_write_line(context, "\"textures\": [");
+                for (cgltf_size i = 0; i < data->textures_count; ++i)
+                {
+                        cgltf_write_texture(context, data->textures + i);
+                }
+                cgltf_write_line(context, "]");
+        }
+
+        if (data->skins_count > 0)
+        {
+                cgltf_write_line(context, "\"skins\": [");
+                for (cgltf_size i = 0; i < data->skins_count; ++i)
+                {
+                        cgltf_write_skin(context, data->skins + i);
+                }
+                cgltf_write_line(context, "]");
+        }
+
+        if (data->animations_count > 0)
+        {
+                cgltf_write_line(context, "\"animations\": [");
+                for (cgltf_size i = 0; i < data->animations_count; ++i)
+                {
+                        cgltf_write_animation(context, data->animations + i);
+                }
+                cgltf_write_line(context, "]");
+        }
+
+        if (data->cameras_count > 0)
+        {
+                cgltf_write_line(context, "\"cameras\": [");
+                for (cgltf_size i = 0; i < data->cameras_count; ++i)
+                {
+                        cgltf_write_camera(context, data->cameras + i);
+                }
+                cgltf_write_line(context, "]");
+        }
+
+        if (data->lights_count > 0)
+        {
+                cgltf_write_line(context, "\"extensions\": {");
+
+                cgltf_write_line(context, "\"KHR_lights_punctual\": {");
+                cgltf_write_line(context, "\"lights\": [");
+                for (cgltf_size i = 0; i < data->lights_count; ++i)
+                {
+                        cgltf_write_light(context, data->lights + i);
+                }
+                cgltf_write_line(context, "]");
+                cgltf_write_line(context, "}");
+
+                cgltf_write_line(context, "}");
+        }
+
+        if (context->extension_flags != 0) {
+                cgltf_write_line(context, "\"extensionsUsed\": [");
+                cgltf_write_extensions(context, context->extension_flags);
+                cgltf_write_line(context, "]");
+        }
+
+        if (context->required_extension_flags != 0) {
+                cgltf_write_line(context, "\"extensionsRequired\": [");
+                cgltf_write_extensions(context, context->required_extension_flags);
+                cgltf_write_line(context, "]");
+        }
+
+        cgltf_write_extras(context, &data->extras);
+
+        CGLTF_SPRINTF("\n}\n");
+
+        // snprintf does not include the null terminator in its return value, so be sure to include it
+        // in the returned byte count.
+        return 1 + ctx.chars_written;
+}
+
+#endif /* #ifdef CGLTF_WRITE_IMPLEMENTATION */
+
+/* cgltf is distributed under MIT license:
+ *
+ * Copyright (c) 2019 Philip Rideout
+
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
diff --git a/gfx/contrib/glad.zip b/gfx/contrib/glad.zip
new file mode 100644
index 0000000..d5d3564
--- /dev/null
+++ b/gfx/contrib/glad.zip
diff --git a/gfx/contrib/glad/CMakeLists.txt b/gfx/contrib/glad/CMakeLists.txt
new file mode 100644
index 0000000..08b550c
--- /dev/null
+++ b/gfx/contrib/glad/CMakeLists.txt
@@ -0,0 +1,9 @@
+cmake_minimum_required(VERSION 3.16)
+
+project(glad)
+
+add_library(glad
+  src/glad.c)
+
+target_include_directories(glad PUBLIC
+  include)
diff --git a/gfx/contrib/glad/README.md b/gfx/contrib/glad/README.md
new file mode 100644
index 0000000..a0c9908
--- /dev/null
+++ b/gfx/contrib/glad/README.md
@@ -0,0 +1,10 @@
+# GLAD
+
+[GLAD OpenGL file loader](https://glad.dav1d.de/)
+
+Spec: OpenGL
+Profile: Core
+
+GL: 4.6
+GLES1: None
+GLES2: 3.2
diff --git a/gfx/contrib/glad/include/KHR/khrplatform.h b/gfx/contrib/glad/include/KHR/khrplatform.h
new file mode 100644
index 0000000..dd22d92
--- /dev/null
+++ b/gfx/contrib/glad/include/KHR/khrplatform.h
@@ -0,0 +1,290 @@
+#ifndef __khrplatform_h_
+#define __khrplatform_h_
+
+/*
+** Copyright (c) 2008-2018 The Khronos Group Inc.
+**
+** Permission is hereby granted, free of charge, to any person obtaining a
+** copy of this software and/or associated documentation files (the
+** "Materials"), to deal in the Materials without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Materials, and to
+** permit persons to whom the Materials are furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be included
+** in all copies or substantial portions of the Materials.
+**
+** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+*/
+
+/* Khronos platform-specific types and definitions.
+ *
+ * The master copy of khrplatform.h is maintained in the Khronos EGL
+ * Registry repository at https://github.com/KhronosGroup/EGL-Registry
+ * The last semantic modification to khrplatform.h was at commit ID:
+ *      67a3e0864c2d75ea5287b9f3d2eb74a745936692
+ *
+ * Adopters may modify this file to suit their platform. Adopters are
+ * encouraged to submit platform specific modifications to the Khronos
+ * group so that they can be included in future versions of this file.
+ * Please submit changes by filing pull requests or issues on
+ * the EGL Registry repository linked above.
+ *
+ *
+ * See the Implementer's Guidelines for information about where this file
+ * should be located on your system and for more details of its use:
+ *    http://www.khronos.org/registry/implementers_guide.pdf
+ *
+ * This file should be included as
+ *        #include <KHR/khrplatform.h>
+ * by Khronos client API header files that use its types and defines.
+ *
+ * The types in khrplatform.h should only be used to define API-specific types.
+ *
+ * Types defined in khrplatform.h:
+ *    khronos_int8_t              signed   8  bit
+ *    khronos_uint8_t             unsigned 8  bit
+ *    khronos_int16_t             signed   16 bit
+ *    khronos_uint16_t            unsigned 16 bit
+ *    khronos_int32_t             signed   32 bit
+ *    khronos_uint32_t            unsigned 32 bit
+ *    khronos_int64_t             signed   64 bit
+ *    khronos_uint64_t            unsigned 64 bit
+ *    khronos_intptr_t            signed   same number of bits as a pointer
+ *    khronos_uintptr_t           unsigned same number of bits as a pointer
+ *    khronos_ssize_t             signed   size
+ *    khronos_usize_t             unsigned size
+ *    khronos_float_t             signed   32 bit floating point
+ *    khronos_time_ns_t           unsigned 64 bit time in nanoseconds
+ *    khronos_utime_nanoseconds_t unsigned time interval or absolute time in
+ *                                         nanoseconds
+ *    khronos_stime_nanoseconds_t signed time interval in nanoseconds
+ *    khronos_boolean_enum_t      enumerated boolean type. This should
+ *      only be used as a base type when a client API's boolean type is
+ *      an enum. Client APIs which use an integer or other type for
+ *      booleans cannot use this as the base type for their boolean.
+ *
+ * Tokens defined in khrplatform.h:
+ *
+ *    KHRONOS_FALSE, KHRONOS_TRUE Enumerated boolean false/true values.
+ *
+ *    KHRONOS_SUPPORT_INT64 is 1 if 64 bit integers are supported; otherwise 0.
+ *    KHRONOS_SUPPORT_FLOAT is 1 if floats are supported; otherwise 0.
+ *
+ * Calling convention macros defined in this file:
+ *    KHRONOS_APICALL
+ *    KHRONOS_APIENTRY
+ *    KHRONOS_APIATTRIBUTES
+ *
+ * These may be used in function prototypes as:
+ *
+ *      KHRONOS_APICALL void KHRONOS_APIENTRY funcname(
+ *                                  int arg1,
+ *                                  int arg2) KHRONOS_APIATTRIBUTES;
+ */
+
+#if defined(__SCITECH_SNAP__) && !defined(KHRONOS_STATIC)
+#   define KHRONOS_STATIC 1
+#endif
+
+/*-------------------------------------------------------------------------
+ * Definition of KHRONOS_APICALL
+ *-------------------------------------------------------------------------
+ * This precedes the return type of the function in the function prototype.
+ */
+#if defined(KHRONOS_STATIC)
+    /* If the preprocessor constant KHRONOS_STATIC is defined, make the
+     * header compatible with static linking. */
+#   define KHRONOS_APICALL
+#elif defined(_WIN32)
+#   define KHRONOS_APICALL __declspec(dllimport)
+#elif defined (__SYMBIAN32__)
+#   define KHRONOS_APICALL IMPORT_C
+#elif defined(__ANDROID__)
+#   define KHRONOS_APICALL __attribute__((visibility("default")))
+#else
+#   define KHRONOS_APICALL
+#endif
+
+/*-------------------------------------------------------------------------
+ * Definition of KHRONOS_APIENTRY
+ *-------------------------------------------------------------------------
+ * This follows the return type of the function  and precedes the function
+ * name in the function prototype.
+ */
+#if defined(_WIN32) && !defined(_WIN32_WCE) && !defined(__SCITECH_SNAP__)
+    /* Win32 but not WinCE */
+#   define KHRONOS_APIENTRY __stdcall
+#else
+#   define KHRONOS_APIENTRY
+#endif
+
+/*-------------------------------------------------------------------------
+ * Definition of KHRONOS_APIATTRIBUTES
+ *-------------------------------------------------------------------------
+ * This follows the closing parenthesis of the function prototype arguments.
+ */
+#if defined (__ARMCC_2__)
+#define KHRONOS_APIATTRIBUTES __softfp
+#else
+#define KHRONOS_APIATTRIBUTES
+#endif
+
+/*-------------------------------------------------------------------------
+ * basic type definitions
+ *-----------------------------------------------------------------------*/
+#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || defined(__GNUC__) || defined(__SCO__) || defined(__USLC__)
+
+
+/*
+ * Using <stdint.h>
+ */
+#include <stdint.h>
+typedef int32_t                 khronos_int32_t;
+typedef uint32_t                khronos_uint32_t;
+typedef int64_t                 khronos_int64_t;
+typedef uint64_t                khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#elif defined(__VMS ) || defined(__sgi)
+
+/*
+ * Using <inttypes.h>
+ */
+#include <inttypes.h>
+typedef int32_t                 khronos_int32_t;
+typedef uint32_t                khronos_uint32_t;
+typedef int64_t                 khronos_int64_t;
+typedef uint64_t                khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#elif defined(_WIN32) && !defined(__SCITECH_SNAP__)
+
+/*
+ * Win32
+ */
+typedef __int32                 khronos_int32_t;
+typedef unsigned __int32        khronos_uint32_t;
+typedef __int64                 khronos_int64_t;
+typedef unsigned __int64        khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#elif defined(__sun__) || defined(__digital__)
+
+/*
+ * Sun or Digital
+ */
+typedef int                     khronos_int32_t;
+typedef unsigned int            khronos_uint32_t;
+#if defined(__arch64__) || defined(_LP64)
+typedef long int                khronos_int64_t;
+typedef unsigned long int       khronos_uint64_t;
+#else
+typedef long long int           khronos_int64_t;
+typedef unsigned long long int  khronos_uint64_t;
+#endif /* __arch64__ */
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#elif 0
+
+/*
+ * Hypothetical platform with no float or int64 support
+ */
+typedef int                     khronos_int32_t;
+typedef unsigned int            khronos_uint32_t;
+#define KHRONOS_SUPPORT_INT64   0
+#define KHRONOS_SUPPORT_FLOAT   0
+
+#else
+
+/*
+ * Generic fallback
+ */
+#include <stdint.h>
+typedef int32_t                 khronos_int32_t;
+typedef uint32_t                khronos_uint32_t;
+typedef int64_t                 khronos_int64_t;
+typedef uint64_t                khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#endif
+
+
+/*
+ * Types that are (so far) the same on all platforms
+ */
+typedef signed   char          khronos_int8_t;
+typedef unsigned char          khronos_uint8_t;
+typedef signed   short int     khronos_int16_t;
+typedef unsigned short int     khronos_uint16_t;
+
+/*
+ * Types that differ between LLP64 and LP64 architectures - in LLP64,
+ * pointers are 64 bits, but 'long' is still 32 bits. Win64 appears
+ * to be the only LLP64 architecture in current use.
+ */
+#ifdef _WIN64
+typedef signed   long long int khronos_intptr_t;
+typedef unsigned long long int khronos_uintptr_t;
+typedef signed   long long int khronos_ssize_t;
+typedef unsigned long long int khronos_usize_t;
+#else
+typedef signed   long  int     khronos_intptr_t;
+typedef unsigned long  int     khronos_uintptr_t;
+typedef signed   long  int     khronos_ssize_t;
+typedef unsigned long  int     khronos_usize_t;
+#endif
+
+#if KHRONOS_SUPPORT_FLOAT
+/*
+ * Float type
+ */
+typedef          float         khronos_float_t;
+#endif
+
+#if KHRONOS_SUPPORT_INT64
+/* Time types
+ *
+ * These types can be used to represent a time interval in nanoseconds or
+ * an absolute Unadjusted System Time.  Unadjusted System Time is the number
+ * of nanoseconds since some arbitrary system event (e.g. since the last
+ * time the system booted).  The Unadjusted System Time is an unsigned
+ * 64 bit value that wraps back to 0 every 584 years.  Time intervals
+ * may be either signed or unsigned.
+ */
+typedef khronos_uint64_t       khronos_utime_nanoseconds_t;
+typedef khronos_int64_t        khronos_stime_nanoseconds_t;
+#endif
+
+/*
+ * Dummy value used to pad enum types to 32 bits.
+ */
+#ifndef KHRONOS_MAX_ENUM
+#define KHRONOS_MAX_ENUM 0x7FFFFFFF
+#endif
+
+/*
+ * Enumerated boolean type
+ *
+ * Values other than zero should be considered to be true.  Therefore
+ * comparisons should not be made against KHRONOS_TRUE.
+ */
+typedef enum {
+    KHRONOS_FALSE = 0,
+    KHRONOS_TRUE  = 1,
+    KHRONOS_BOOLEAN_ENUM_FORCE_SIZE = KHRONOS_MAX_ENUM
+} khronos_boolean_enum_t;
+
+#endif /* __khrplatform_h_ */
diff --git a/gfx/contrib/glad/include/glad/glad.h b/gfx/contrib/glad/include/glad/glad.h
new file mode 100644
index 0000000..0556552
--- /dev/null
+++ b/gfx/contrib/glad/include/glad/glad.h
@@ -0,0 +1,3773 @@
+/*
+
+    OpenGL, OpenGL ES loader generated by glad 0.1.33 on Sun Aug 30 00:22:38 2020.
+
+    Language/Generator: C/C++
+    Specification: gl
+    APIs: gl=4.6, gles2=3.2
+    Profile: core
+    Extensions:
+        
+    Loader: True
+    Local files: False
+    Omit khrplatform: False
+    Reproducible: False
+
+    Commandline:
+        --profile="core" --api="gl=4.6,gles2=3.2" --generator="c" --spec="gl" --extensions=""
+    Online:
+        https://glad.dav1d.de/#profile=core&language=c&specification=gl&loader=on&api=gl%3D4.6&api=gles2%3D3.2
+*/
+
+
+#ifndef __glad_h_
+#define __glad_h_
+
+#ifdef __gl_h_
+#error OpenGL header already included, remove this include, glad already provides it
+#endif
+#define __gl_h_
+
+#ifdef __gl2_h_
+#error OpenGL ES 2 header already included, remove this include, glad already provides it
+#endif
+#define __gl2_h_
+
+#ifdef __gl3_h_
+#error OpenGL ES 3 header already included, remove this include, glad already provides it
+#endif
+#define __gl3_h_
+
+#if defined(_WIN32) && !defined(APIENTRY) && !defined(__CYGWIN__) && !defined(__SCITECH_SNAP__)
+#define APIENTRY __stdcall
+#endif
+
+#ifndef APIENTRY
+#define APIENTRY
+#endif
+#ifndef APIENTRYP
+#define APIENTRYP APIENTRY *
+#endif
+
+#ifndef GLAPIENTRY
+#define GLAPIENTRY APIENTRY
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct gladGLversionStruct {
+    int major;
+    int minor;
+};
+
+typedef void* (* GLADloadproc)(const char *name);
+
+#ifndef GLAPI
+# if defined(GLAD_GLAPI_EXPORT)
+#  if defined(_WIN32) || defined(__CYGWIN__)
+#   if defined(GLAD_GLAPI_EXPORT_BUILD)
+#    if defined(__GNUC__)
+#     define GLAPI __attribute__ ((dllexport)) extern
+#    else
+#     define GLAPI __declspec(dllexport) extern
+#    endif
+#   else
+#    if defined(__GNUC__)
+#     define GLAPI __attribute__ ((dllimport)) extern
+#    else
+#     define GLAPI __declspec(dllimport) extern
+#    endif
+#   endif
+#  elif defined(__GNUC__) && defined(GLAD_GLAPI_EXPORT_BUILD)
+#   define GLAPI __attribute__ ((visibility ("default"))) extern
+#  else
+#   define GLAPI extern
+#  endif
+# else
+#  define GLAPI extern
+# endif
+#endif
+
+GLAPI struct gladGLversionStruct GLVersion;
+
+GLAPI int gladLoadGL(void);
+
+GLAPI int gladLoadGLLoader(GLADloadproc);
+
+GLAPI int gladLoadGLES2Loader(GLADloadproc);
+
+#include <KHR/khrplatform.h>
+typedef unsigned int GLenum;
+typedef unsigned char GLboolean;
+typedef unsigned int GLbitfield;
+typedef void GLvoid;
+typedef khronos_int8_t GLbyte;
+typedef khronos_uint8_t GLubyte;
+typedef khronos_int16_t GLshort;
+typedef khronos_uint16_t GLushort;
+typedef int GLint;
+typedef unsigned int GLuint;
+typedef khronos_int32_t GLclampx;
+typedef int GLsizei;
+typedef khronos_float_t GLfloat;
+typedef khronos_float_t GLclampf;
+typedef double GLdouble;
+typedef double GLclampd;
+typedef void *GLeglClientBufferEXT;
+typedef void *GLeglImageOES;
+typedef char GLchar;
+typedef char GLcharARB;
+#ifdef __APPLE__
+typedef void *GLhandleARB;
+#else
+typedef unsigned int GLhandleARB;
+#endif
+typedef khronos_uint16_t GLhalf;
+typedef khronos_uint16_t GLhalfARB;
+typedef khronos_int32_t GLfixed;
+typedef khronos_intptr_t GLintptr;
+typedef khronos_intptr_t GLintptrARB;
+typedef khronos_ssize_t GLsizeiptr;
+typedef khronos_ssize_t GLsizeiptrARB;
+typedef khronos_int64_t GLint64;
+typedef khronos_int64_t GLint64EXT;
+typedef khronos_uint64_t GLuint64;
+typedef khronos_uint64_t GLuint64EXT;
+typedef struct __GLsync *GLsync;
+struct _cl_context;
+struct _cl_event;
+typedef void (APIENTRY *GLDEBUGPROC)(GLenum source,GLenum type,GLuint id,GLenum severity,GLsizei length,const GLchar *message,const void *userParam);
+typedef void (APIENTRY *GLDEBUGPROCARB)(GLenum source,GLenum type,GLuint id,GLenum severity,GLsizei length,const GLchar *message,const void *userParam);
+typedef void (APIENTRY *GLDEBUGPROCKHR)(GLenum source,GLenum type,GLuint id,GLenum severity,GLsizei length,const GLchar *message,const void *userParam);
+typedef void (APIENTRY *GLDEBUGPROCAMD)(GLuint id,GLenum category,GLenum severity,GLsizei length,const GLchar *message,void *userParam);
+typedef unsigned short GLhalfNV;
+typedef GLintptr GLvdpauSurfaceNV;
+typedef void (APIENTRY *GLVULKANPROCNV)(void);
+#define GL_DEPTH_BUFFER_BIT 0x00000100
+#define GL_STENCIL_BUFFER_BIT 0x00000400
+#define GL_COLOR_BUFFER_BIT 0x00004000
+#define GL_FALSE 0
+#define GL_TRUE 1
+#define GL_POINTS 0x0000
+#define GL_LINES 0x0001
+#define GL_LINE_LOOP 0x0002
+#define GL_LINE_STRIP 0x0003
+#define GL_TRIANGLES 0x0004
+#define GL_TRIANGLE_STRIP 0x0005
+#define GL_TRIANGLE_FAN 0x0006
+#define GL_NEVER 0x0200
+#define GL_LESS 0x0201
+#define GL_EQUAL 0x0202
+#define GL_LEQUAL 0x0203
+#define GL_GREATER 0x0204
+#define GL_NOTEQUAL 0x0205
+#define GL_GEQUAL 0x0206
+#define GL_ALWAYS 0x0207
+#define GL_ZERO 0
+#define GL_ONE 1
+#define GL_SRC_COLOR 0x0300
+#define GL_ONE_MINUS_SRC_COLOR 0x0301
+#define GL_SRC_ALPHA 0x0302
+#define GL_ONE_MINUS_SRC_ALPHA 0x0303
+#define GL_DST_ALPHA 0x0304
+#define GL_ONE_MINUS_DST_ALPHA 0x0305
+#define GL_DST_COLOR 0x0306
+#define GL_ONE_MINUS_DST_COLOR 0x0307
+#define GL_SRC_ALPHA_SATURATE 0x0308
+#define GL_NONE 0
+#define GL_FRONT_LEFT 0x0400
+#define GL_FRONT_RIGHT 0x0401
+#define GL_BACK_LEFT 0x0402
+#define GL_BACK_RIGHT 0x0403
+#define GL_FRONT 0x0404
+#define GL_BACK 0x0405
+#define GL_LEFT 0x0406
+#define GL_RIGHT 0x0407
+#define GL_FRONT_AND_BACK 0x0408
+#define GL_NO_ERROR 0
+#define GL_INVALID_ENUM 0x0500
+#define GL_INVALID_VALUE 0x0501
+#define GL_INVALID_OPERATION 0x0502
+#define GL_OUT_OF_MEMORY 0x0505
+#define GL_CW 0x0900
+#define GL_CCW 0x0901
+#define GL_POINT_SIZE 0x0B11
+#define GL_POINT_SIZE_RANGE 0x0B12
+#define GL_POINT_SIZE_GRANULARITY 0x0B13
+#define GL_LINE_SMOOTH 0x0B20
+#define GL_LINE_WIDTH 0x0B21
+#define GL_LINE_WIDTH_RANGE 0x0B22
+#define GL_LINE_WIDTH_GRANULARITY 0x0B23
+#define GL_POLYGON_MODE 0x0B40
+#define GL_POLYGON_SMOOTH 0x0B41
+#define GL_CULL_FACE 0x0B44
+#define GL_CULL_FACE_MODE 0x0B45
+#define GL_FRONT_FACE 0x0B46
+#define GL_DEPTH_RANGE 0x0B70
+#define GL_DEPTH_TEST 0x0B71
+#define GL_DEPTH_WRITEMASK 0x0B72
+#define GL_DEPTH_CLEAR_VALUE 0x0B73
+#define GL_DEPTH_FUNC 0x0B74
+#define GL_STENCIL_TEST 0x0B90
+#define GL_STENCIL_CLEAR_VALUE 0x0B91
+#define GL_STENCIL_FUNC 0x0B92
+#define GL_STENCIL_VALUE_MASK 0x0B93
+#define GL_STENCIL_FAIL 0x0B94
+#define GL_STENCIL_PASS_DEPTH_FAIL 0x0B95
+#define GL_STENCIL_PASS_DEPTH_PASS 0x0B96
+#define GL_STENCIL_REF 0x0B97
+#define GL_STENCIL_WRITEMASK 0x0B98
+#define GL_VIEWPORT 0x0BA2
+#define GL_DITHER 0x0BD0
+#define GL_BLEND_DST 0x0BE0
+#define GL_BLEND_SRC 0x0BE1
+#define GL_BLEND 0x0BE2
+#define GL_LOGIC_OP_MODE 0x0BF0
+#define GL_DRAW_BUFFER 0x0C01
+#define GL_READ_BUFFER 0x0C02
+#define GL_SCISSOR_BOX 0x0C10
+#define GL_SCISSOR_TEST 0x0C11
+#define GL_COLOR_CLEAR_VALUE 0x0C22
+#define GL_COLOR_WRITEMASK 0x0C23
+#define GL_DOUBLEBUFFER 0x0C32
+#define GL_STEREO 0x0C33
+#define GL_LINE_SMOOTH_HINT 0x0C52
+#define GL_POLYGON_SMOOTH_HINT 0x0C53
+#define GL_UNPACK_SWAP_BYTES 0x0CF0
+#define GL_UNPACK_LSB_FIRST 0x0CF1
+#define GL_UNPACK_ROW_LENGTH 0x0CF2
+#define GL_UNPACK_SKIP_ROWS 0x0CF3
+#define GL_UNPACK_SKIP_PIXELS 0x0CF4
+#define GL_UNPACK_ALIGNMENT 0x0CF5
+#define GL_PACK_SWAP_BYTES 0x0D00
+#define GL_PACK_LSB_FIRST 0x0D01
+#define GL_PACK_ROW_LENGTH 0x0D02
+#define GL_PACK_SKIP_ROWS 0x0D03
+#define GL_PACK_SKIP_PIXELS 0x0D04
+#define GL_PACK_ALIGNMENT 0x0D05
+#define GL_MAX_TEXTURE_SIZE 0x0D33
+#define GL_MAX_VIEWPORT_DIMS 0x0D3A
+#define GL_SUBPIXEL_BITS 0x0D50
+#define GL_TEXTURE_1D 0x0DE0
+#define GL_TEXTURE_2D 0x0DE1
+#define GL_TEXTURE_WIDTH 0x1000
+#define GL_TEXTURE_HEIGHT 0x1001
+#define GL_TEXTURE_BORDER_COLOR 0x1004
+#define GL_DONT_CARE 0x1100
+#define GL_FASTEST 0x1101
+#define GL_NICEST 0x1102
+#define GL_BYTE 0x1400
+#define GL_UNSIGNED_BYTE 0x1401
+#define GL_SHORT 0x1402
+#define GL_UNSIGNED_SHORT 0x1403
+#define GL_INT 0x1404
+#define GL_UNSIGNED_INT 0x1405
+#define GL_FLOAT 0x1406
+#define GL_CLEAR 0x1500
+#define GL_AND 0x1501
+#define GL_AND_REVERSE 0x1502
+#define GL_COPY 0x1503
+#define GL_AND_INVERTED 0x1504
+#define GL_NOOP 0x1505
+#define GL_XOR 0x1506
+#define GL_OR 0x1507
+#define GL_NOR 0x1508
+#define GL_EQUIV 0x1509
+#define GL_INVERT 0x150A
+#define GL_OR_REVERSE 0x150B
+#define GL_COPY_INVERTED 0x150C
+#define GL_OR_INVERTED 0x150D
+#define GL_NAND 0x150E
+#define GL_SET 0x150F
+#define GL_TEXTURE 0x1702
+#define GL_COLOR 0x1800
+#define GL_DEPTH 0x1801
+#define GL_STENCIL 0x1802
+#define GL_STENCIL_INDEX 0x1901
+#define GL_DEPTH_COMPONENT 0x1902
+#define GL_RED 0x1903
+#define GL_GREEN 0x1904
+#define GL_BLUE 0x1905
+#define GL_ALPHA 0x1906
+#define GL_RGB 0x1907
+#define GL_RGBA 0x1908
+#define GL_POINT 0x1B00
+#define GL_LINE 0x1B01
+#define GL_FILL 0x1B02
+#define GL_KEEP 0x1E00
+#define GL_REPLACE 0x1E01
+#define GL_INCR 0x1E02
+#define GL_DECR 0x1E03
+#define GL_VENDOR 0x1F00
+#define GL_RENDERER 0x1F01
+#define GL_VERSION 0x1F02
+#define GL_EXTENSIONS 0x1F03
+#define GL_NEAREST 0x2600
+#define GL_LINEAR 0x2601
+#define GL_NEAREST_MIPMAP_NEAREST 0x2700
+#define GL_LINEAR_MIPMAP_NEAREST 0x2701
+#define GL_NEAREST_MIPMAP_LINEAR 0x2702
+#define GL_LINEAR_MIPMAP_LINEAR 0x2703
+#define GL_TEXTURE_MAG_FILTER 0x2800
+#define GL_TEXTURE_MIN_FILTER 0x2801
+#define GL_TEXTURE_WRAP_S 0x2802
+#define GL_TEXTURE_WRAP_T 0x2803
+#define GL_REPEAT 0x2901
+#define GL_COLOR_LOGIC_OP 0x0BF2
+#define GL_POLYGON_OFFSET_UNITS 0x2A00
+#define GL_POLYGON_OFFSET_POINT 0x2A01
+#define GL_POLYGON_OFFSET_LINE 0x2A02
+#define GL_POLYGON_OFFSET_FILL 0x8037
+#define GL_POLYGON_OFFSET_FACTOR 0x8038
+#define GL_TEXTURE_BINDING_1D 0x8068
+#define GL_TEXTURE_BINDING_2D 0x8069
+#define GL_TEXTURE_INTERNAL_FORMAT 0x1003
+#define GL_TEXTURE_RED_SIZE 0x805C
+#define GL_TEXTURE_GREEN_SIZE 0x805D
+#define GL_TEXTURE_BLUE_SIZE 0x805E
+#define GL_TEXTURE_ALPHA_SIZE 0x805F
+#define GL_DOUBLE 0x140A
+#define GL_PROXY_TEXTURE_1D 0x8063
+#define GL_PROXY_TEXTURE_2D 0x8064
+#define GL_R3_G3_B2 0x2A10
+#define GL_RGB4 0x804F
+#define GL_RGB5 0x8050
+#define GL_RGB8 0x8051
+#define GL_RGB10 0x8052
+#define GL_RGB12 0x8053
+#define GL_RGB16 0x8054
+#define GL_RGBA2 0x8055
+#define GL_RGBA4 0x8056
+#define GL_RGB5_A1 0x8057
+#define GL_RGBA8 0x8058
+#define GL_RGB10_A2 0x8059
+#define GL_RGBA12 0x805A
+#define GL_RGBA16 0x805B
+#define GL_UNSIGNED_BYTE_3_3_2 0x8032
+#define GL_UNSIGNED_SHORT_4_4_4_4 0x8033
+#define GL_UNSIGNED_SHORT_5_5_5_1 0x8034
+#define GL_UNSIGNED_INT_8_8_8_8 0x8035
+#define GL_UNSIGNED_INT_10_10_10_2 0x8036
+#define GL_TEXTURE_BINDING_3D 0x806A
+#define GL_PACK_SKIP_IMAGES 0x806B
+#define GL_PACK_IMAGE_HEIGHT 0x806C
+#define GL_UNPACK_SKIP_IMAGES 0x806D
+#define GL_UNPACK_IMAGE_HEIGHT 0x806E
+#define GL_TEXTURE_3D 0x806F
+#define GL_PROXY_TEXTURE_3D 0x8070
+#define GL_TEXTURE_DEPTH 0x8071
+#define GL_TEXTURE_WRAP_R 0x8072
+#define GL_MAX_3D_TEXTURE_SIZE 0x8073
+#define GL_UNSIGNED_BYTE_2_3_3_REV 0x8362
+#define GL_UNSIGNED_SHORT_5_6_5 0x8363
+#define GL_UNSIGNED_SHORT_5_6_5_REV 0x8364
+#define GL_UNSIGNED_SHORT_4_4_4_4_REV 0x8365
+#define GL_UNSIGNED_SHORT_1_5_5_5_REV 0x8366
+#define GL_UNSIGNED_INT_8_8_8_8_REV 0x8367
+#define GL_UNSIGNED_INT_2_10_10_10_REV 0x8368
+#define GL_BGR 0x80E0
+#define GL_BGRA 0x80E1
+#define GL_MAX_ELEMENTS_VERTICES 0x80E8
+#define GL_MAX_ELEMENTS_INDICES 0x80E9
+#define GL_CLAMP_TO_EDGE 0x812F
+#define GL_TEXTURE_MIN_LOD 0x813A
+#define GL_TEXTURE_MAX_LOD 0x813B
+#define GL_TEXTURE_BASE_LEVEL 0x813C
+#define GL_TEXTURE_MAX_LEVEL 0x813D
+#define GL_SMOOTH_POINT_SIZE_RANGE 0x0B12
+#define GL_SMOOTH_POINT_SIZE_GRANULARITY 0x0B13
+#define GL_SMOOTH_LINE_WIDTH_RANGE 0x0B22
+#define GL_SMOOTH_LINE_WIDTH_GRANULARITY 0x0B23
+#define GL_ALIASED_LINE_WIDTH_RANGE 0x846E
+#define GL_TEXTURE0 0x84C0
+#define GL_TEXTURE1 0x84C1
+#define GL_TEXTURE2 0x84C2
+#define GL_TEXTURE3 0x84C3
+#define GL_TEXTURE4 0x84C4
+#define GL_TEXTURE5 0x84C5
+#define GL_TEXTURE6 0x84C6
+#define GL_TEXTURE7 0x84C7
+#define GL_TEXTURE8 0x84C8
+#define GL_TEXTURE9 0x84C9
+#define GL_TEXTURE10 0x84CA
+#define GL_TEXTURE11 0x84CB
+#define GL_TEXTURE12 0x84CC
+#define GL_TEXTURE13 0x84CD
+#define GL_TEXTURE14 0x84CE
+#define GL_TEXTURE15 0x84CF
+#define GL_TEXTURE16 0x84D0
+#define GL_TEXTURE17 0x84D1
+#define GL_TEXTURE18 0x84D2
+#define GL_TEXTURE19 0x84D3
+#define GL_TEXTURE20 0x84D4
+#define GL_TEXTURE21 0x84D5
+#define GL_TEXTURE22 0x84D6
+#define GL_TEXTURE23 0x84D7
+#define GL_TEXTURE24 0x84D8
+#define GL_TEXTURE25 0x84D9
+#define GL_TEXTURE26 0x84DA
+#define GL_TEXTURE27 0x84DB
+#define GL_TEXTURE28 0x84DC
+#define GL_TEXTURE29 0x84DD
+#define GL_TEXTURE30 0x84DE
+#define GL_TEXTURE31 0x84DF
+#define GL_ACTIVE_TEXTURE 0x84E0
+#define GL_MULTISAMPLE 0x809D
+#define GL_SAMPLE_ALPHA_TO_COVERAGE 0x809E
+#define GL_SAMPLE_ALPHA_TO_ONE 0x809F
+#define GL_SAMPLE_COVERAGE 0x80A0
+#define GL_SAMPLE_BUFFERS 0x80A8
+#define GL_SAMPLES 0x80A9
+#define GL_SAMPLE_COVERAGE_VALUE 0x80AA
+#define GL_SAMPLE_COVERAGE_INVERT 0x80AB
+#define GL_TEXTURE_CUBE_MAP 0x8513
+#define GL_TEXTURE_BINDING_CUBE_MAP 0x8514
+#define GL_TEXTURE_CUBE_MAP_POSITIVE_X 0x8515
+#define GL_TEXTURE_CUBE_MAP_NEGATIVE_X 0x8516
+#define GL_TEXTURE_CUBE_MAP_POSITIVE_Y 0x8517
+#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Y 0x8518
+#define GL_TEXTURE_CUBE_MAP_POSITIVE_Z 0x8519
+#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Z 0x851A
+#define GL_PROXY_TEXTURE_CUBE_MAP 0x851B
+#define GL_MAX_CUBE_MAP_TEXTURE_SIZE 0x851C
+#define GL_COMPRESSED_RGB 0x84ED
+#define GL_COMPRESSED_RGBA 0x84EE
+#define GL_TEXTURE_COMPRESSION_HINT 0x84EF
+#define GL_TEXTURE_COMPRESSED_IMAGE_SIZE 0x86A0
+#define GL_TEXTURE_COMPRESSED 0x86A1
+#define GL_NUM_COMPRESSED_TEXTURE_FORMATS 0x86A2
+#define GL_COMPRESSED_TEXTURE_FORMATS 0x86A3
+#define GL_CLAMP_TO_BORDER 0x812D
+#define GL_BLEND_DST_RGB 0x80C8
+#define GL_BLEND_SRC_RGB 0x80C9
+#define GL_BLEND_DST_ALPHA 0x80CA
+#define GL_BLEND_SRC_ALPHA 0x80CB
+#define GL_POINT_FADE_THRESHOLD_SIZE 0x8128
+#define GL_DEPTH_COMPONENT16 0x81A5
+#define GL_DEPTH_COMPONENT24 0x81A6
+#define GL_DEPTH_COMPONENT32 0x81A7
+#define GL_MIRRORED_REPEAT 0x8370
+#define GL_MAX_TEXTURE_LOD_BIAS 0x84FD
+#define GL_TEXTURE_LOD_BIAS 0x8501
+#define GL_INCR_WRAP 0x8507
+#define GL_DECR_WRAP 0x8508
+#define GL_TEXTURE_DEPTH_SIZE 0x884A
+#define GL_TEXTURE_COMPARE_MODE 0x884C
+#define GL_TEXTURE_COMPARE_FUNC 0x884D
+#define GL_BLEND_COLOR 0x8005
+#define GL_BLEND_EQUATION 0x8009
+#define GL_CONSTANT_COLOR 0x8001
+#define GL_ONE_MINUS_CONSTANT_COLOR 0x8002
+#define GL_CONSTANT_ALPHA 0x8003
+#define GL_ONE_MINUS_CONSTANT_ALPHA 0x8004
+#define GL_FUNC_ADD 0x8006
+#define GL_FUNC_REVERSE_SUBTRACT 0x800B
+#define GL_FUNC_SUBTRACT 0x800A
+#define GL_MIN 0x8007
+#define GL_MAX 0x8008
+#define GL_BUFFER_SIZE 0x8764
+#define GL_BUFFER_USAGE 0x8765
+#define GL_QUERY_COUNTER_BITS 0x8864
+#define GL_CURRENT_QUERY 0x8865
+#define GL_QUERY_RESULT 0x8866
+#define GL_QUERY_RESULT_AVAILABLE 0x8867
+#define GL_ARRAY_BUFFER 0x8892
+#define GL_ELEMENT_ARRAY_BUFFER 0x8893
+#define GL_ARRAY_BUFFER_BINDING 0x8894
+#define GL_ELEMENT_ARRAY_BUFFER_BINDING 0x8895
+#define GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING 0x889F
+#define GL_READ_ONLY 0x88B8
+#define GL_WRITE_ONLY 0x88B9
+#define GL_READ_WRITE 0x88BA
+#define GL_BUFFER_ACCESS 0x88BB
+#define GL_BUFFER_MAPPED 0x88BC
+#define GL_BUFFER_MAP_POINTER 0x88BD
+#define GL_STREAM_DRAW 0x88E0
+#define GL_STREAM_READ 0x88E1
+#define GL_STREAM_COPY 0x88E2
+#define GL_STATIC_DRAW 0x88E4
+#define GL_STATIC_READ 0x88E5
+#define GL_STATIC_COPY 0x88E6
+#define GL_DYNAMIC_DRAW 0x88E8
+#define GL_DYNAMIC_READ 0x88E9
+#define GL_DYNAMIC_COPY 0x88EA
+#define GL_SAMPLES_PASSED 0x8914
+#define GL_SRC1_ALPHA 0x8589
+#define GL_BLEND_EQUATION_RGB 0x8009
+#define GL_VERTEX_ATTRIB_ARRAY_ENABLED 0x8622
+#define GL_VERTEX_ATTRIB_ARRAY_SIZE 0x8623
+#define GL_VERTEX_ATTRIB_ARRAY_STRIDE 0x8624
+#define GL_VERTEX_ATTRIB_ARRAY_TYPE 0x8625
+#define GL_CURRENT_VERTEX_ATTRIB 0x8626
+#define GL_VERTEX_PROGRAM_POINT_SIZE 0x8642
+#define GL_VERTEX_ATTRIB_ARRAY_POINTER 0x8645
+#define GL_STENCIL_BACK_FUNC 0x8800
+#define GL_STENCIL_BACK_FAIL 0x8801
+#define GL_STENCIL_BACK_PASS_DEPTH_FAIL 0x8802
+#define GL_STENCIL_BACK_PASS_DEPTH_PASS 0x8803
+#define GL_MAX_DRAW_BUFFERS 0x8824
+#define GL_DRAW_BUFFER0 0x8825
+#define GL_DRAW_BUFFER1 0x8826
+#define GL_DRAW_BUFFER2 0x8827
+#define GL_DRAW_BUFFER3 0x8828
+#define GL_DRAW_BUFFER4 0x8829
+#define GL_DRAW_BUFFER5 0x882A
+#define GL_DRAW_BUFFER6 0x882B
+#define GL_DRAW_BUFFER7 0x882C
+#define GL_DRAW_BUFFER8 0x882D
+#define GL_DRAW_BUFFER9 0x882E
+#define GL_DRAW_BUFFER10 0x882F
+#define GL_DRAW_BUFFER11 0x8830
+#define GL_DRAW_BUFFER12 0x8831
+#define GL_DRAW_BUFFER13 0x8832
+#define GL_DRAW_BUFFER14 0x8833
+#define GL_DRAW_BUFFER15 0x8834
+#define GL_BLEND_EQUATION_ALPHA 0x883D
+#define GL_MAX_VERTEX_ATTRIBS 0x8869
+#define GL_VERTEX_ATTRIB_ARRAY_NORMALIZED 0x886A
+#define GL_MAX_TEXTURE_IMAGE_UNITS 0x8872
+#define GL_FRAGMENT_SHADER 0x8B30
+#define GL_VERTEX_SHADER 0x8B31
+#define GL_MAX_FRAGMENT_UNIFORM_COMPONENTS 0x8B49
+#define GL_MAX_VERTEX_UNIFORM_COMPONENTS 0x8B4A
+#define GL_MAX_VARYING_FLOATS 0x8B4B
+#define GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS 0x8B4C
+#define GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS 0x8B4D
+#define GL_SHADER_TYPE 0x8B4F
+#define GL_FLOAT_VEC2 0x8B50
+#define GL_FLOAT_VEC3 0x8B51
+#define GL_FLOAT_VEC4 0x8B52
+#define GL_INT_VEC2 0x8B53
+#define GL_INT_VEC3 0x8B54
+#define GL_INT_VEC4 0x8B55
+#define GL_BOOL 0x8B56
+#define GL_BOOL_VEC2 0x8B57
+#define GL_BOOL_VEC3 0x8B58
+#define GL_BOOL_VEC4 0x8B59
+#define GL_FLOAT_MAT2 0x8B5A
+#define GL_FLOAT_MAT3 0x8B5B
+#define GL_FLOAT_MAT4 0x8B5C
+#define GL_SAMPLER_1D 0x8B5D
+#define GL_SAMPLER_2D 0x8B5E
+#define GL_SAMPLER_3D 0x8B5F
+#define GL_SAMPLER_CUBE 0x8B60
+#define GL_SAMPLER_1D_SHADOW 0x8B61
+#define GL_SAMPLER_2D_SHADOW 0x8B62
+#define GL_DELETE_STATUS 0x8B80
+#define GL_COMPILE_STATUS 0x8B81
+#define GL_LINK_STATUS 0x8B82
+#define GL_VALIDATE_STATUS 0x8B83
+#define GL_INFO_LOG_LENGTH 0x8B84
+#define GL_ATTACHED_SHADERS 0x8B85
+#define GL_ACTIVE_UNIFORMS 0x8B86
+#define GL_ACTIVE_UNIFORM_MAX_LENGTH 0x8B87
+#define GL_SHADER_SOURCE_LENGTH 0x8B88
+#define GL_ACTIVE_ATTRIBUTES 0x8B89
+#define GL_ACTIVE_ATTRIBUTE_MAX_LENGTH 0x8B8A
+#define GL_FRAGMENT_SHADER_DERIVATIVE_HINT 0x8B8B
+#define GL_SHADING_LANGUAGE_VERSION 0x8B8C
+#define GL_CURRENT_PROGRAM 0x8B8D
+#define GL_POINT_SPRITE_COORD_ORIGIN 0x8CA0
+#define GL_LOWER_LEFT 0x8CA1
+#define GL_UPPER_LEFT 0x8CA2
+#define GL_STENCIL_BACK_REF 0x8CA3
+#define GL_STENCIL_BACK_VALUE_MASK 0x8CA4
+#define GL_STENCIL_BACK_WRITEMASK 0x8CA5
+#define GL_PIXEL_PACK_BUFFER 0x88EB
+#define GL_PIXEL_UNPACK_BUFFER 0x88EC
+#define GL_PIXEL_PACK_BUFFER_BINDING 0x88ED
+#define GL_PIXEL_UNPACK_BUFFER_BINDING 0x88EF
+#define GL_FLOAT_MAT2x3 0x8B65
+#define GL_FLOAT_MAT2x4 0x8B66
+#define GL_FLOAT_MAT3x2 0x8B67
+#define GL_FLOAT_MAT3x4 0x8B68
+#define GL_FLOAT_MAT4x2 0x8B69
+#define GL_FLOAT_MAT4x3 0x8B6A
+#define GL_SRGB 0x8C40
+#define GL_SRGB8 0x8C41
+#define GL_SRGB_ALPHA 0x8C42
+#define GL_SRGB8_ALPHA8 0x8C43
+#define GL_COMPRESSED_SRGB 0x8C48
+#define GL_COMPRESSED_SRGB_ALPHA 0x8C49
+#define GL_COMPARE_REF_TO_TEXTURE 0x884E
+#define GL_CLIP_DISTANCE0 0x3000
+#define GL_CLIP_DISTANCE1 0x3001
+#define GL_CLIP_DISTANCE2 0x3002
+#define GL_CLIP_DISTANCE3 0x3003
+#define GL_CLIP_DISTANCE4 0x3004
+#define GL_CLIP_DISTANCE5 0x3005
+#define GL_CLIP_DISTANCE6 0x3006
+#define GL_CLIP_DISTANCE7 0x3007
+#define GL_MAX_CLIP_DISTANCES 0x0D32
+#define GL_MAJOR_VERSION 0x821B
+#define GL_MINOR_VERSION 0x821C
+#define GL_NUM_EXTENSIONS 0x821D
+#define GL_CONTEXT_FLAGS 0x821E
+#define GL_COMPRESSED_RED 0x8225
+#define GL_COMPRESSED_RG 0x8226
+#define GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT 0x00000001
+#define GL_RGBA32F 0x8814
+#define GL_RGB32F 0x8815
+#define GL_RGBA16F 0x881A
+#define GL_RGB16F 0x881B
+#define GL_VERTEX_ATTRIB_ARRAY_INTEGER 0x88FD
+#define GL_MAX_ARRAY_TEXTURE_LAYERS 0x88FF
+#define GL_MIN_PROGRAM_TEXEL_OFFSET 0x8904
+#define GL_MAX_PROGRAM_TEXEL_OFFSET 0x8905
+#define GL_CLAMP_READ_COLOR 0x891C
+#define GL_FIXED_ONLY 0x891D
+#define GL_MAX_VARYING_COMPONENTS 0x8B4B
+#define GL_TEXTURE_1D_ARRAY 0x8C18
+#define GL_PROXY_TEXTURE_1D_ARRAY 0x8C19
+#define GL_TEXTURE_2D_ARRAY 0x8C1A
+#define GL_PROXY_TEXTURE_2D_ARRAY 0x8C1B
+#define GL_TEXTURE_BINDING_1D_ARRAY 0x8C1C
+#define GL_TEXTURE_BINDING_2D_ARRAY 0x8C1D
+#define GL_R11F_G11F_B10F 0x8C3A
+#define GL_UNSIGNED_INT_10F_11F_11F_REV 0x8C3B
+#define GL_RGB9_E5 0x8C3D
+#define GL_UNSIGNED_INT_5_9_9_9_REV 0x8C3E
+#define GL_TEXTURE_SHARED_SIZE 0x8C3F
+#define GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH 0x8C76
+#define GL_TRANSFORM_FEEDBACK_BUFFER_MODE 0x8C7F
+#define GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS 0x8C80
+#define GL_TRANSFORM_FEEDBACK_VARYINGS 0x8C83
+#define GL_TRANSFORM_FEEDBACK_BUFFER_START 0x8C84
+#define GL_TRANSFORM_FEEDBACK_BUFFER_SIZE 0x8C85
+#define GL_PRIMITIVES_GENERATED 0x8C87
+#define GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN 0x8C88
+#define GL_RASTERIZER_DISCARD 0x8C89
+#define GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS 0x8C8A
+#define GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS 0x8C8B
+#define GL_INTERLEAVED_ATTRIBS 0x8C8C
+#define GL_SEPARATE_ATTRIBS 0x8C8D
+#define GL_TRANSFORM_FEEDBACK_BUFFER 0x8C8E
+#define GL_TRANSFORM_FEEDBACK_BUFFER_BINDING 0x8C8F
+#define GL_RGBA32UI 0x8D70
+#define GL_RGB32UI 0x8D71
+#define GL_RGBA16UI 0x8D76
+#define GL_RGB16UI 0x8D77
+#define GL_RGBA8UI 0x8D7C
+#define GL_RGB8UI 0x8D7D
+#define GL_RGBA32I 0x8D82
+#define GL_RGB32I 0x8D83
+#define GL_RGBA16I 0x8D88
+#define GL_RGB16I 0x8D89
+#define GL_RGBA8I 0x8D8E
+#define GL_RGB8I 0x8D8F
+#define GL_RED_INTEGER 0x8D94
+#define GL_GREEN_INTEGER 0x8D95
+#define GL_BLUE_INTEGER 0x8D96
+#define GL_RGB_INTEGER 0x8D98
+#define GL_RGBA_INTEGER 0x8D99
+#define GL_BGR_INTEGER 0x8D9A
+#define GL_BGRA_INTEGER 0x8D9B
+#define GL_SAMPLER_1D_ARRAY 0x8DC0
+#define GL_SAMPLER_2D_ARRAY 0x8DC1
+#define GL_SAMPLER_1D_ARRAY_SHADOW 0x8DC3
+#define GL_SAMPLER_2D_ARRAY_SHADOW 0x8DC4
+#define GL_SAMPLER_CUBE_SHADOW 0x8DC5
+#define GL_UNSIGNED_INT_VEC2 0x8DC6
+#define GL_UNSIGNED_INT_VEC3 0x8DC7
+#define GL_UNSIGNED_INT_VEC4 0x8DC8
+#define GL_INT_SAMPLER_1D 0x8DC9
+#define GL_INT_SAMPLER_2D 0x8DCA
+#define GL_INT_SAMPLER_3D 0x8DCB
+#define GL_INT_SAMPLER_CUBE 0x8DCC
+#define GL_INT_SAMPLER_1D_ARRAY 0x8DCE
+#define GL_INT_SAMPLER_2D_ARRAY 0x8DCF
+#define GL_UNSIGNED_INT_SAMPLER_1D 0x8DD1
+#define GL_UNSIGNED_INT_SAMPLER_2D 0x8DD2
+#define GL_UNSIGNED_INT_SAMPLER_3D 0x8DD3
+#define GL_UNSIGNED_INT_SAMPLER_CUBE 0x8DD4
+#define GL_UNSIGNED_INT_SAMPLER_1D_ARRAY 0x8DD6
+#define GL_UNSIGNED_INT_SAMPLER_2D_ARRAY 0x8DD7
+#define GL_QUERY_WAIT 0x8E13
+#define GL_QUERY_NO_WAIT 0x8E14
+#define GL_QUERY_BY_REGION_WAIT 0x8E15
+#define GL_QUERY_BY_REGION_NO_WAIT 0x8E16
+#define GL_BUFFER_ACCESS_FLAGS 0x911F
+#define GL_BUFFER_MAP_LENGTH 0x9120
+#define GL_BUFFER_MAP_OFFSET 0x9121
+#define GL_DEPTH_COMPONENT32F 0x8CAC
+#define GL_DEPTH32F_STENCIL8 0x8CAD
+#define GL_FLOAT_32_UNSIGNED_INT_24_8_REV 0x8DAD
+#define GL_INVALID_FRAMEBUFFER_OPERATION 0x0506
+#define GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING 0x8210
+#define GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE 0x8211
+#define GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE 0x8212
+#define GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE 0x8213
+#define GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE 0x8214
+#define GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE 0x8215
+#define GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE 0x8216
+#define GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE 0x8217
+#define GL_FRAMEBUFFER_DEFAULT 0x8218
+#define GL_FRAMEBUFFER_UNDEFINED 0x8219
+#define GL_DEPTH_STENCIL_ATTACHMENT 0x821A
+#define GL_MAX_RENDERBUFFER_SIZE 0x84E8
+#define GL_DEPTH_STENCIL 0x84F9
+#define GL_UNSIGNED_INT_24_8 0x84FA
+#define GL_DEPTH24_STENCIL8 0x88F0
+#define GL_TEXTURE_STENCIL_SIZE 0x88F1
+#define GL_TEXTURE_RED_TYPE 0x8C10
+#define GL_TEXTURE_GREEN_TYPE 0x8C11
+#define GL_TEXTURE_BLUE_TYPE 0x8C12
+#define GL_TEXTURE_ALPHA_TYPE 0x8C13
+#define GL_TEXTURE_DEPTH_TYPE 0x8C16
+#define GL_UNSIGNED_NORMALIZED 0x8C17
+#define GL_FRAMEBUFFER_BINDING 0x8CA6
+#define GL_DRAW_FRAMEBUFFER_BINDING 0x8CA6
+#define GL_RENDERBUFFER_BINDING 0x8CA7
+#define GL_READ_FRAMEBUFFER 0x8CA8
+#define GL_DRAW_FRAMEBUFFER 0x8CA9
+#define GL_READ_FRAMEBUFFER_BINDING 0x8CAA
+#define GL_RENDERBUFFER_SAMPLES 0x8CAB
+#define GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE 0x8CD0
+#define GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME 0x8CD1
+#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL 0x8CD2
+#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE 0x8CD3
+#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER 0x8CD4
+#define GL_FRAMEBUFFER_COMPLETE 0x8CD5
+#define GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT 0x8CD6
+#define GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT 0x8CD7
+#define GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER 0x8CDB
+#define GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER 0x8CDC
+#define GL_FRAMEBUFFER_UNSUPPORTED 0x8CDD
+#define GL_MAX_COLOR_ATTACHMENTS 0x8CDF
+#define GL_COLOR_ATTACHMENT0 0x8CE0
+#define GL_COLOR_ATTACHMENT1 0x8CE1
+#define GL_COLOR_ATTACHMENT2 0x8CE2
+#define GL_COLOR_ATTACHMENT3 0x8CE3
+#define GL_COLOR_ATTACHMENT4 0x8CE4
+#define GL_COLOR_ATTACHMENT5 0x8CE5
+#define GL_COLOR_ATTACHMENT6 0x8CE6
+#define GL_COLOR_ATTACHMENT7 0x8CE7
+#define GL_COLOR_ATTACHMENT8 0x8CE8
+#define GL_COLOR_ATTACHMENT9 0x8CE9
+#define GL_COLOR_ATTACHMENT10 0x8CEA
+#define GL_COLOR_ATTACHMENT11 0x8CEB
+#define GL_COLOR_ATTACHMENT12 0x8CEC
+#define GL_COLOR_ATTACHMENT13 0x8CED
+#define GL_COLOR_ATTACHMENT14 0x8CEE
+#define GL_COLOR_ATTACHMENT15 0x8CEF
+#define GL_COLOR_ATTACHMENT16 0x8CF0
+#define GL_COLOR_ATTACHMENT17 0x8CF1
+#define GL_COLOR_ATTACHMENT18 0x8CF2
+#define GL_COLOR_ATTACHMENT19 0x8CF3
+#define GL_COLOR_ATTACHMENT20 0x8CF4
+#define GL_COLOR_ATTACHMENT21 0x8CF5
+#define GL_COLOR_ATTACHMENT22 0x8CF6
+#define GL_COLOR_ATTACHMENT23 0x8CF7
+#define GL_COLOR_ATTACHMENT24 0x8CF8
+#define GL_COLOR_ATTACHMENT25 0x8CF9
+#define GL_COLOR_ATTACHMENT26 0x8CFA
+#define GL_COLOR_ATTACHMENT27 0x8CFB
+#define GL_COLOR_ATTACHMENT28 0x8CFC
+#define GL_COLOR_ATTACHMENT29 0x8CFD
+#define GL_COLOR_ATTACHMENT30 0x8CFE
+#define GL_COLOR_ATTACHMENT31 0x8CFF
+#define GL_DEPTH_ATTACHMENT 0x8D00
+#define GL_STENCIL_ATTACHMENT 0x8D20
+#define GL_FRAMEBUFFER 0x8D40
+#define GL_RENDERBUFFER 0x8D41
+#define GL_RENDERBUFFER_WIDTH 0x8D42
+#define GL_RENDERBUFFER_HEIGHT 0x8D43
+#define GL_RENDERBUFFER_INTERNAL_FORMAT 0x8D44
+#define GL_STENCIL_INDEX1 0x8D46
+#define GL_STENCIL_INDEX4 0x8D47
+#define GL_STENCIL_INDEX8 0x8D48
+#define GL_STENCIL_INDEX16 0x8D49
+#define GL_RENDERBUFFER_RED_SIZE 0x8D50
+#define GL_RENDERBUFFER_GREEN_SIZE 0x8D51
+#define GL_RENDERBUFFER_BLUE_SIZE 0x8D52
+#define GL_RENDERBUFFER_ALPHA_SIZE 0x8D53
+#define GL_RENDERBUFFER_DEPTH_SIZE 0x8D54
+#define GL_RENDERBUFFER_STENCIL_SIZE 0x8D55
+#define GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE 0x8D56
+#define GL_MAX_SAMPLES 0x8D57
+#define GL_FRAMEBUFFER_SRGB 0x8DB9
+#define GL_HALF_FLOAT 0x140B
+#define GL_MAP_READ_BIT 0x0001
+#define GL_MAP_WRITE_BIT 0x0002
+#define GL_MAP_INVALIDATE_RANGE_BIT 0x0004
+#define GL_MAP_INVALIDATE_BUFFER_BIT 0x0008
+#define GL_MAP_FLUSH_EXPLICIT_BIT 0x0010
+#define GL_MAP_UNSYNCHRONIZED_BIT 0x0020
+#define GL_COMPRESSED_RED_RGTC1 0x8DBB
+#define GL_COMPRESSED_SIGNED_RED_RGTC1 0x8DBC
+#define GL_COMPRESSED_RG_RGTC2 0x8DBD
+#define GL_COMPRESSED_SIGNED_RG_RGTC2 0x8DBE
+#define GL_RG 0x8227
+#define GL_RG_INTEGER 0x8228
+#define GL_R8 0x8229
+#define GL_R16 0x822A
+#define GL_RG8 0x822B
+#define GL_RG16 0x822C
+#define GL_R16F 0x822D
+#define GL_R32F 0x822E
+#define GL_RG16F 0x822F
+#define GL_RG32F 0x8230
+#define GL_R8I 0x8231
+#define GL_R8UI 0x8232
+#define GL_R16I 0x8233
+#define GL_R16UI 0x8234
+#define GL_R32I 0x8235
+#define GL_R32UI 0x8236
+#define GL_RG8I 0x8237
+#define GL_RG8UI 0x8238
+#define GL_RG16I 0x8239
+#define GL_RG16UI 0x823A
+#define GL_RG32I 0x823B
+#define GL_RG32UI 0x823C
+#define GL_VERTEX_ARRAY_BINDING 0x85B5
+#define GL_SAMPLER_2D_RECT 0x8B63
+#define GL_SAMPLER_2D_RECT_SHADOW 0x8B64
+#define GL_SAMPLER_BUFFER 0x8DC2
+#define GL_INT_SAMPLER_2D_RECT 0x8DCD
+#define GL_INT_SAMPLER_BUFFER 0x8DD0
+#define GL_UNSIGNED_INT_SAMPLER_2D_RECT 0x8DD5
+#define GL_UNSIGNED_INT_SAMPLER_BUFFER 0x8DD8
+#define GL_TEXTURE_BUFFER 0x8C2A
+#define GL_MAX_TEXTURE_BUFFER_SIZE 0x8C2B
+#define GL_TEXTURE_BINDING_BUFFER 0x8C2C
+#define GL_TEXTURE_BUFFER_DATA_STORE_BINDING 0x8C2D
+#define GL_TEXTURE_RECTANGLE 0x84F5
+#define GL_TEXTURE_BINDING_RECTANGLE 0x84F6
+#define GL_PROXY_TEXTURE_RECTANGLE 0x84F7
+#define GL_MAX_RECTANGLE_TEXTURE_SIZE 0x84F8
+#define GL_R8_SNORM 0x8F94
+#define GL_RG8_SNORM 0x8F95
+#define GL_RGB8_SNORM 0x8F96
+#define GL_RGBA8_SNORM 0x8F97
+#define GL_R16_SNORM 0x8F98
+#define GL_RG16_SNORM 0x8F99
+#define GL_RGB16_SNORM 0x8F9A
+#define GL_RGBA16_SNORM 0x8F9B
+#define GL_SIGNED_NORMALIZED 0x8F9C
+#define GL_PRIMITIVE_RESTART 0x8F9D
+#define GL_PRIMITIVE_RESTART_INDEX 0x8F9E
+#define GL_COPY_READ_BUFFER 0x8F36
+#define GL_COPY_WRITE_BUFFER 0x8F37
+#define GL_UNIFORM_BUFFER 0x8A11
+#define GL_UNIFORM_BUFFER_BINDING 0x8A28
+#define GL_UNIFORM_BUFFER_START 0x8A29
+#define GL_UNIFORM_BUFFER_SIZE 0x8A2A
+#define GL_MAX_VERTEX_UNIFORM_BLOCKS 0x8A2B
+#define GL_MAX_GEOMETRY_UNIFORM_BLOCKS 0x8A2C
+#define GL_MAX_FRAGMENT_UNIFORM_BLOCKS 0x8A2D
+#define GL_MAX_COMBINED_UNIFORM_BLOCKS 0x8A2E
+#define GL_MAX_UNIFORM_BUFFER_BINDINGS 0x8A2F
+#define GL_MAX_UNIFORM_BLOCK_SIZE 0x8A30
+#define GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS 0x8A31
+#define GL_MAX_COMBINED_GEOMETRY_UNIFORM_COMPONENTS 0x8A32
+#define GL_MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS 0x8A33
+#define GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT 0x8A34
+#define GL_ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH 0x8A35
+#define GL_ACTIVE_UNIFORM_BLOCKS 0x8A36
+#define GL_UNIFORM_TYPE 0x8A37
+#define GL_UNIFORM_SIZE 0x8A38
+#define GL_UNIFORM_NAME_LENGTH 0x8A39
+#define GL_UNIFORM_BLOCK_INDEX 0x8A3A
+#define GL_UNIFORM_OFFSET 0x8A3B
+#define GL_UNIFORM_ARRAY_STRIDE 0x8A3C
+#define GL_UNIFORM_MATRIX_STRIDE 0x8A3D
+#define GL_UNIFORM_IS_ROW_MAJOR 0x8A3E
+#define GL_UNIFORM_BLOCK_BINDING 0x8A3F
+#define GL_UNIFORM_BLOCK_DATA_SIZE 0x8A40
+#define GL_UNIFORM_BLOCK_NAME_LENGTH 0x8A41
+#define GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS 0x8A42
+#define GL_UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES 0x8A43
+#define GL_UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER 0x8A44
+#define GL_UNIFORM_BLOCK_REFERENCED_BY_GEOMETRY_SHADER 0x8A45
+#define GL_UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER 0x8A46
+#define GL_INVALID_INDEX 0xFFFFFFFF
+#define GL_CONTEXT_CORE_PROFILE_BIT 0x00000001
+#define GL_CONTEXT_COMPATIBILITY_PROFILE_BIT 0x00000002
+#define GL_LINES_ADJACENCY 0x000A
+#define GL_LINE_STRIP_ADJACENCY 0x000B
+#define GL_TRIANGLES_ADJACENCY 0x000C
+#define GL_TRIANGLE_STRIP_ADJACENCY 0x000D
+#define GL_PROGRAM_POINT_SIZE 0x8642
+#define GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS 0x8C29
+#define GL_FRAMEBUFFER_ATTACHMENT_LAYERED 0x8DA7
+#define GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS 0x8DA8
+#define GL_GEOMETRY_SHADER 0x8DD9
+#define GL_GEOMETRY_VERTICES_OUT 0x8916
+#define GL_GEOMETRY_INPUT_TYPE 0x8917
+#define GL_GEOMETRY_OUTPUT_TYPE 0x8918
+#define GL_MAX_GEOMETRY_UNIFORM_COMPONENTS 0x8DDF
+#define GL_MAX_GEOMETRY_OUTPUT_VERTICES 0x8DE0
+#define GL_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS 0x8DE1
+#define GL_MAX_VERTEX_OUTPUT_COMPONENTS 0x9122
+#define GL_MAX_GEOMETRY_INPUT_COMPONENTS 0x9123
+#define GL_MAX_GEOMETRY_OUTPUT_COMPONENTS 0x9124
+#define GL_MAX_FRAGMENT_INPUT_COMPONENTS 0x9125
+#define GL_CONTEXT_PROFILE_MASK 0x9126
+#define GL_DEPTH_CLAMP 0x864F
+#define GL_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION 0x8E4C
+#define GL_FIRST_VERTEX_CONVENTION 0x8E4D
+#define GL_LAST_VERTEX_CONVENTION 0x8E4E
+#define GL_PROVOKING_VERTEX 0x8E4F
+#define GL_TEXTURE_CUBE_MAP_SEAMLESS 0x884F
+#define GL_MAX_SERVER_WAIT_TIMEOUT 0x9111
+#define GL_OBJECT_TYPE 0x9112
+#define GL_SYNC_CONDITION 0x9113
+#define GL_SYNC_STATUS 0x9114
+#define GL_SYNC_FLAGS 0x9115
+#define GL_SYNC_FENCE 0x9116
+#define GL_SYNC_GPU_COMMANDS_COMPLETE 0x9117
+#define GL_UNSIGNALED 0x9118
+#define GL_SIGNALED 0x9119
+#define GL_ALREADY_SIGNALED 0x911A
+#define GL_TIMEOUT_EXPIRED 0x911B
+#define GL_CONDITION_SATISFIED 0x911C
+#define GL_WAIT_FAILED 0x911D
+#define GL_TIMEOUT_IGNORED 0xFFFFFFFFFFFFFFFF
+#define GL_SYNC_FLUSH_COMMANDS_BIT 0x00000001
+#define GL_SAMPLE_POSITION 0x8E50
+#define GL_SAMPLE_MASK 0x8E51
+#define GL_SAMPLE_MASK_VALUE 0x8E52
+#define GL_MAX_SAMPLE_MASK_WORDS 0x8E59
+#define GL_TEXTURE_2D_MULTISAMPLE 0x9100
+#define GL_PROXY_TEXTURE_2D_MULTISAMPLE 0x9101
+#define GL_TEXTURE_2D_MULTISAMPLE_ARRAY 0x9102
+#define GL_PROXY_TEXTURE_2D_MULTISAMPLE_ARRAY 0x9103
+#define GL_TEXTURE_BINDING_2D_MULTISAMPLE 0x9104
+#define GL_TEXTURE_BINDING_2D_MULTISAMPLE_ARRAY 0x9105
+#define GL_TEXTURE_SAMPLES 0x9106
+#define GL_TEXTURE_FIXED_SAMPLE_LOCATIONS 0x9107
+#define GL_SAMPLER_2D_MULTISAMPLE 0x9108
+#define GL_INT_SAMPLER_2D_MULTISAMPLE 0x9109
+#define GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE 0x910A
+#define GL_SAMPLER_2D_MULTISAMPLE_ARRAY 0x910B
+#define GL_INT_SAMPLER_2D_MULTISAMPLE_ARRAY 0x910C
+#define GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY 0x910D
+#define GL_MAX_COLOR_TEXTURE_SAMPLES 0x910E
+#define GL_MAX_DEPTH_TEXTURE_SAMPLES 0x910F
+#define GL_MAX_INTEGER_SAMPLES 0x9110
+#define GL_VERTEX_ATTRIB_ARRAY_DIVISOR 0x88FE
+#define GL_SRC1_COLOR 0x88F9
+#define GL_ONE_MINUS_SRC1_COLOR 0x88FA
+#define GL_ONE_MINUS_SRC1_ALPHA 0x88FB
+#define GL_MAX_DUAL_SOURCE_DRAW_BUFFERS 0x88FC
+#define GL_ANY_SAMPLES_PASSED 0x8C2F
+#define GL_SAMPLER_BINDING 0x8919
+#define GL_RGB10_A2UI 0x906F
+#define GL_TEXTURE_SWIZZLE_R 0x8E42
+#define GL_TEXTURE_SWIZZLE_G 0x8E43
+#define GL_TEXTURE_SWIZZLE_B 0x8E44
+#define GL_TEXTURE_SWIZZLE_A 0x8E45
+#define GL_TEXTURE_SWIZZLE_RGBA 0x8E46
+#define GL_TIME_ELAPSED 0x88BF
+#define GL_TIMESTAMP 0x8E28
+#define GL_INT_2_10_10_10_REV 0x8D9F
+#define GL_SAMPLE_SHADING 0x8C36
+#define GL_MIN_SAMPLE_SHADING_VALUE 0x8C37
+#define GL_MIN_PROGRAM_TEXTURE_GATHER_OFFSET 0x8E5E
+#define GL_MAX_PROGRAM_TEXTURE_GATHER_OFFSET 0x8E5F
+#define GL_TEXTURE_CUBE_MAP_ARRAY 0x9009
+#define GL_TEXTURE_BINDING_CUBE_MAP_ARRAY 0x900A
+#define GL_PROXY_TEXTURE_CUBE_MAP_ARRAY 0x900B
+#define GL_SAMPLER_CUBE_MAP_ARRAY 0x900C
+#define GL_SAMPLER_CUBE_MAP_ARRAY_SHADOW 0x900D
+#define GL_INT_SAMPLER_CUBE_MAP_ARRAY 0x900E
+#define GL_UNSIGNED_INT_SAMPLER_CUBE_MAP_ARRAY 0x900F
+#define GL_DRAW_INDIRECT_BUFFER 0x8F3F
+#define GL_DRAW_INDIRECT_BUFFER_BINDING 0x8F43
+#define GL_GEOMETRY_SHADER_INVOCATIONS 0x887F
+#define GL_MAX_GEOMETRY_SHADER_INVOCATIONS 0x8E5A
+#define GL_MIN_FRAGMENT_INTERPOLATION_OFFSET 0x8E5B
+#define GL_MAX_FRAGMENT_INTERPOLATION_OFFSET 0x8E5C
+#define GL_FRAGMENT_INTERPOLATION_OFFSET_BITS 0x8E5D
+#define GL_MAX_VERTEX_STREAMS 0x8E71
+#define GL_DOUBLE_VEC2 0x8FFC
+#define GL_DOUBLE_VEC3 0x8FFD
+#define GL_DOUBLE_VEC4 0x8FFE
+#define GL_DOUBLE_MAT2 0x8F46
+#define GL_DOUBLE_MAT3 0x8F47
+#define GL_DOUBLE_MAT4 0x8F48
+#define GL_DOUBLE_MAT2x3 0x8F49
+#define GL_DOUBLE_MAT2x4 0x8F4A
+#define GL_DOUBLE_MAT3x2 0x8F4B
+#define GL_DOUBLE_MAT3x4 0x8F4C
+#define GL_DOUBLE_MAT4x2 0x8F4D
+#define GL_DOUBLE_MAT4x3 0x8F4E
+#define GL_ACTIVE_SUBROUTINES 0x8DE5
+#define GL_ACTIVE_SUBROUTINE_UNIFORMS 0x8DE6
+#define GL_ACTIVE_SUBROUTINE_UNIFORM_LOCATIONS 0x8E47
+#define GL_ACTIVE_SUBROUTINE_MAX_LENGTH 0x8E48
+#define GL_ACTIVE_SUBROUTINE_UNIFORM_MAX_LENGTH 0x8E49
+#define GL_MAX_SUBROUTINES 0x8DE7
+#define GL_MAX_SUBROUTINE_UNIFORM_LOCATIONS 0x8DE8
+#define GL_NUM_COMPATIBLE_SUBROUTINES 0x8E4A
+#define GL_COMPATIBLE_SUBROUTINES 0x8E4B
+#define GL_PATCHES 0x000E
+#define GL_PATCH_VERTICES 0x8E72
+#define GL_PATCH_DEFAULT_INNER_LEVEL 0x8E73
+#define GL_PATCH_DEFAULT_OUTER_LEVEL 0x8E74
+#define GL_TESS_CONTROL_OUTPUT_VERTICES 0x8E75
+#define GL_TESS_GEN_MODE 0x8E76
+#define GL_TESS_GEN_SPACING 0x8E77
+#define GL_TESS_GEN_VERTEX_ORDER 0x8E78
+#define GL_TESS_GEN_POINT_MODE 0x8E79
+#define GL_ISOLINES 0x8E7A
+#define GL_QUADS 0x0007
+#define GL_FRACTIONAL_ODD 0x8E7B
+#define GL_FRACTIONAL_EVEN 0x8E7C
+#define GL_MAX_PATCH_VERTICES 0x8E7D
+#define GL_MAX_TESS_GEN_LEVEL 0x8E7E
+#define GL_MAX_TESS_CONTROL_UNIFORM_COMPONENTS 0x8E7F
+#define GL_MAX_TESS_EVALUATION_UNIFORM_COMPONENTS 0x8E80
+#define GL_MAX_TESS_CONTROL_TEXTURE_IMAGE_UNITS 0x8E81
+#define GL_MAX_TESS_EVALUATION_TEXTURE_IMAGE_UNITS 0x8E82
+#define GL_MAX_TESS_CONTROL_OUTPUT_COMPONENTS 0x8E83
+#define GL_MAX_TESS_PATCH_COMPONENTS 0x8E84
+#define GL_MAX_TESS_CONTROL_TOTAL_OUTPUT_COMPONENTS 0x8E85
+#define GL_MAX_TESS_EVALUATION_OUTPUT_COMPONENTS 0x8E86
+#define GL_MAX_TESS_CONTROL_UNIFORM_BLOCKS 0x8E89
+#define GL_MAX_TESS_EVALUATION_UNIFORM_BLOCKS 0x8E8A
+#define GL_MAX_TESS_CONTROL_INPUT_COMPONENTS 0x886C
+#define GL_MAX_TESS_EVALUATION_INPUT_COMPONENTS 0x886D
+#define GL_MAX_COMBINED_TESS_CONTROL_UNIFORM_COMPONENTS 0x8E1E
+#define GL_MAX_COMBINED_TESS_EVALUATION_UNIFORM_COMPONENTS 0x8E1F
+#define GL_UNIFORM_BLOCK_REFERENCED_BY_TESS_CONTROL_SHADER 0x84F0
+#define GL_UNIFORM_BLOCK_REFERENCED_BY_TESS_EVALUATION_SHADER 0x84F1
+#define GL_TESS_EVALUATION_SHADER 0x8E87
+#define GL_TESS_CONTROL_SHADER 0x8E88
+#define GL_TRANSFORM_FEEDBACK 0x8E22
+#define GL_TRANSFORM_FEEDBACK_BUFFER_PAUSED 0x8E23
+#define GL_TRANSFORM_FEEDBACK_BUFFER_ACTIVE 0x8E24
+#define GL_TRANSFORM_FEEDBACK_BINDING 0x8E25
+#define GL_MAX_TRANSFORM_FEEDBACK_BUFFERS 0x8E70
+#define GL_FIXED 0x140C
+#define GL_IMPLEMENTATION_COLOR_READ_TYPE 0x8B9A
+#define GL_IMPLEMENTATION_COLOR_READ_FORMAT 0x8B9B
+#define GL_LOW_FLOAT 0x8DF0
+#define GL_MEDIUM_FLOAT 0x8DF1
+#define GL_HIGH_FLOAT 0x8DF2
+#define GL_LOW_INT 0x8DF3
+#define GL_MEDIUM_INT 0x8DF4
+#define GL_HIGH_INT 0x8DF5
+#define GL_SHADER_COMPILER 0x8DFA
+#define GL_SHADER_BINARY_FORMATS 0x8DF8
+#define GL_NUM_SHADER_BINARY_FORMATS 0x8DF9
+#define GL_MAX_VERTEX_UNIFORM_VECTORS 0x8DFB
+#define GL_MAX_VARYING_VECTORS 0x8DFC
+#define GL_MAX_FRAGMENT_UNIFORM_VECTORS 0x8DFD
+#define GL_RGB565 0x8D62
+#define GL_PROGRAM_BINARY_RETRIEVABLE_HINT 0x8257
+#define GL_PROGRAM_BINARY_LENGTH 0x8741
+#define GL_NUM_PROGRAM_BINARY_FORMATS 0x87FE
+#define GL_PROGRAM_BINARY_FORMATS 0x87FF
+#define GL_VERTEX_SHADER_BIT 0x00000001
+#define GL_FRAGMENT_SHADER_BIT 0x00000002
+#define GL_GEOMETRY_SHADER_BIT 0x00000004
+#define GL_TESS_CONTROL_SHADER_BIT 0x00000008
+#define GL_TESS_EVALUATION_SHADER_BIT 0x00000010
+#define GL_ALL_SHADER_BITS 0xFFFFFFFF
+#define GL_PROGRAM_SEPARABLE 0x8258
+#define GL_ACTIVE_PROGRAM 0x8259
+#define GL_PROGRAM_PIPELINE_BINDING 0x825A
+#define GL_MAX_VIEWPORTS 0x825B
+#define GL_VIEWPORT_SUBPIXEL_BITS 0x825C
+#define GL_VIEWPORT_BOUNDS_RANGE 0x825D
+#define GL_LAYER_PROVOKING_VERTEX 0x825E
+#define GL_VIEWPORT_INDEX_PROVOKING_VERTEX 0x825F
+#define GL_UNDEFINED_VERTEX 0x8260
+#define GL_COPY_READ_BUFFER_BINDING 0x8F36
+#define GL_COPY_WRITE_BUFFER_BINDING 0x8F37
+#define GL_TRANSFORM_FEEDBACK_ACTIVE 0x8E24
+#define GL_TRANSFORM_FEEDBACK_PAUSED 0x8E23
+#define GL_UNPACK_COMPRESSED_BLOCK_WIDTH 0x9127
+#define GL_UNPACK_COMPRESSED_BLOCK_HEIGHT 0x9128
+#define GL_UNPACK_COMPRESSED_BLOCK_DEPTH 0x9129
+#define GL_UNPACK_COMPRESSED_BLOCK_SIZE 0x912A
+#define GL_PACK_COMPRESSED_BLOCK_WIDTH 0x912B
+#define GL_PACK_COMPRESSED_BLOCK_HEIGHT 0x912C
+#define GL_PACK_COMPRESSED_BLOCK_DEPTH 0x912D
+#define GL_PACK_COMPRESSED_BLOCK_SIZE 0x912E
+#define GL_NUM_SAMPLE_COUNTS 0x9380
+#define GL_MIN_MAP_BUFFER_ALIGNMENT 0x90BC
+#define GL_ATOMIC_COUNTER_BUFFER 0x92C0
+#define GL_ATOMIC_COUNTER_BUFFER_BINDING 0x92C1
+#define GL_ATOMIC_COUNTER_BUFFER_START 0x92C2
+#define GL_ATOMIC_COUNTER_BUFFER_SIZE 0x92C3
+#define GL_ATOMIC_COUNTER_BUFFER_DATA_SIZE 0x92C4
+#define GL_ATOMIC_COUNTER_BUFFER_ACTIVE_ATOMIC_COUNTERS 0x92C5
+#define GL_ATOMIC_COUNTER_BUFFER_ACTIVE_ATOMIC_COUNTER_INDICES 0x92C6
+#define GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_VERTEX_SHADER 0x92C7
+#define GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_TESS_CONTROL_SHADER 0x92C8
+#define GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_TESS_EVALUATION_SHADER 0x92C9
+#define GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_GEOMETRY_SHADER 0x92CA
+#define GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_FRAGMENT_SHADER 0x92CB
+#define GL_MAX_VERTEX_ATOMIC_COUNTER_BUFFERS 0x92CC
+#define GL_MAX_TESS_CONTROL_ATOMIC_COUNTER_BUFFERS 0x92CD
+#define GL_MAX_TESS_EVALUATION_ATOMIC_COUNTER_BUFFERS 0x92CE
+#define GL_MAX_GEOMETRY_ATOMIC_COUNTER_BUFFERS 0x92CF
+#define GL_MAX_FRAGMENT_ATOMIC_COUNTER_BUFFERS 0x92D0
+#define GL_MAX_COMBINED_ATOMIC_COUNTER_BUFFERS 0x92D1
+#define GL_MAX_VERTEX_ATOMIC_COUNTERS 0x92D2
+#define GL_MAX_TESS_CONTROL_ATOMIC_COUNTERS 0x92D3
+#define GL_MAX_TESS_EVALUATION_ATOMIC_COUNTERS 0x92D4
+#define GL_MAX_GEOMETRY_ATOMIC_COUNTERS 0x92D5
+#define GL_MAX_FRAGMENT_ATOMIC_COUNTERS 0x92D6
+#define GL_MAX_COMBINED_ATOMIC_COUNTERS 0x92D7
+#define GL_MAX_ATOMIC_COUNTER_BUFFER_SIZE 0x92D8
+#define GL_MAX_ATOMIC_COUNTER_BUFFER_BINDINGS 0x92DC
+#define GL_ACTIVE_ATOMIC_COUNTER_BUFFERS 0x92D9
+#define GL_UNIFORM_ATOMIC_COUNTER_BUFFER_INDEX 0x92DA
+#define GL_UNSIGNED_INT_ATOMIC_COUNTER 0x92DB
+#define GL_VERTEX_ATTRIB_ARRAY_BARRIER_BIT 0x00000001
+#define GL_ELEMENT_ARRAY_BARRIER_BIT 0x00000002
+#define GL_UNIFORM_BARRIER_BIT 0x00000004
+#define GL_TEXTURE_FETCH_BARRIER_BIT 0x00000008
+#define GL_SHADER_IMAGE_ACCESS_BARRIER_BIT 0x00000020
+#define GL_COMMAND_BARRIER_BIT 0x00000040
+#define GL_PIXEL_BUFFER_BARRIER_BIT 0x00000080
+#define GL_TEXTURE_UPDATE_BARRIER_BIT 0x00000100
+#define GL_BUFFER_UPDATE_BARRIER_BIT 0x00000200
+#define GL_FRAMEBUFFER_BARRIER_BIT 0x00000400
+#define GL_TRANSFORM_FEEDBACK_BARRIER_BIT 0x00000800
+#define GL_ATOMIC_COUNTER_BARRIER_BIT 0x00001000
+#define GL_ALL_BARRIER_BITS 0xFFFFFFFF
+#define GL_MAX_IMAGE_UNITS 0x8F38
+#define GL_MAX_COMBINED_IMAGE_UNITS_AND_FRAGMENT_OUTPUTS 0x8F39
+#define GL_IMAGE_BINDING_NAME 0x8F3A
+#define GL_IMAGE_BINDING_LEVEL 0x8F3B
+#define GL_IMAGE_BINDING_LAYERED 0x8F3C
+#define GL_IMAGE_BINDING_LAYER 0x8F3D
+#define GL_IMAGE_BINDING_ACCESS 0x8F3E
+#define GL_IMAGE_1D 0x904C
+#define GL_IMAGE_2D 0x904D
+#define GL_IMAGE_3D 0x904E
+#define GL_IMAGE_2D_RECT 0x904F
+#define GL_IMAGE_CUBE 0x9050
+#define GL_IMAGE_BUFFER 0x9051
+#define GL_IMAGE_1D_ARRAY 0x9052
+#define GL_IMAGE_2D_ARRAY 0x9053
+#define GL_IMAGE_CUBE_MAP_ARRAY 0x9054
+#define GL_IMAGE_2D_MULTISAMPLE 0x9055
+#define GL_IMAGE_2D_MULTISAMPLE_ARRAY 0x9056
+#define GL_INT_IMAGE_1D 0x9057
+#define GL_INT_IMAGE_2D 0x9058
+#define GL_INT_IMAGE_3D 0x9059
+#define GL_INT_IMAGE_2D_RECT 0x905A
+#define GL_INT_IMAGE_CUBE 0x905B
+#define GL_INT_IMAGE_BUFFER 0x905C
+#define GL_INT_IMAGE_1D_ARRAY 0x905D
+#define GL_INT_IMAGE_2D_ARRAY 0x905E
+#define GL_INT_IMAGE_CUBE_MAP_ARRAY 0x905F
+#define GL_INT_IMAGE_2D_MULTISAMPLE 0x9060
+#define GL_INT_IMAGE_2D_MULTISAMPLE_ARRAY 0x9061
+#define GL_UNSIGNED_INT_IMAGE_1D 0x9062
+#define GL_UNSIGNED_INT_IMAGE_2D 0x9063
+#define GL_UNSIGNED_INT_IMAGE_3D 0x9064
+#define GL_UNSIGNED_INT_IMAGE_2D_RECT 0x9065
+#define GL_UNSIGNED_INT_IMAGE_CUBE 0x9066
+#define GL_UNSIGNED_INT_IMAGE_BUFFER 0x9067
+#define GL_UNSIGNED_INT_IMAGE_1D_ARRAY 0x9068
+#define GL_UNSIGNED_INT_IMAGE_2D_ARRAY 0x9069
+#define GL_UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY 0x906A
+#define GL_UNSIGNED_INT_IMAGE_2D_MULTISAMPLE 0x906B
+#define GL_UNSIGNED_INT_IMAGE_2D_MULTISAMPLE_ARRAY 0x906C
+#define GL_MAX_IMAGE_SAMPLES 0x906D
+#define GL_IMAGE_BINDING_FORMAT 0x906E
+#define GL_IMAGE_FORMAT_COMPATIBILITY_TYPE 0x90C7
+#define GL_IMAGE_FORMAT_COMPATIBILITY_BY_SIZE 0x90C8
+#define GL_IMAGE_FORMAT_COMPATIBILITY_BY_CLASS 0x90C9
+#define GL_MAX_VERTEX_IMAGE_UNIFORMS 0x90CA
+#define GL_MAX_TESS_CONTROL_IMAGE_UNIFORMS 0x90CB
+#define GL_MAX_TESS_EVALUATION_IMAGE_UNIFORMS 0x90CC
+#define GL_MAX_GEOMETRY_IMAGE_UNIFORMS 0x90CD
+#define GL_MAX_FRAGMENT_IMAGE_UNIFORMS 0x90CE
+#define GL_MAX_COMBINED_IMAGE_UNIFORMS 0x90CF
+#define GL_COMPRESSED_RGBA_BPTC_UNORM 0x8E8C
+#define GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM 0x8E8D
+#define GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT 0x8E8E
+#define GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT 0x8E8F
+#define GL_TEXTURE_IMMUTABLE_FORMAT 0x912F
+#define GL_NUM_SHADING_LANGUAGE_VERSIONS 0x82E9
+#define GL_VERTEX_ATTRIB_ARRAY_LONG 0x874E
+#define GL_COMPRESSED_RGB8_ETC2 0x9274
+#define GL_COMPRESSED_SRGB8_ETC2 0x9275
+#define GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2 0x9276
+#define GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2 0x9277
+#define GL_COMPRESSED_RGBA8_ETC2_EAC 0x9278
+#define GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC 0x9279
+#define GL_COMPRESSED_R11_EAC 0x9270
+#define GL_COMPRESSED_SIGNED_R11_EAC 0x9271
+#define GL_COMPRESSED_RG11_EAC 0x9272
+#define GL_COMPRESSED_SIGNED_RG11_EAC 0x9273
+#define GL_PRIMITIVE_RESTART_FIXED_INDEX 0x8D69
+#define GL_ANY_SAMPLES_PASSED_CONSERVATIVE 0x8D6A
+#define GL_MAX_ELEMENT_INDEX 0x8D6B
+#define GL_COMPUTE_SHADER 0x91B9
+#define GL_MAX_COMPUTE_UNIFORM_BLOCKS 0x91BB
+#define GL_MAX_COMPUTE_TEXTURE_IMAGE_UNITS 0x91BC
+#define GL_MAX_COMPUTE_IMAGE_UNIFORMS 0x91BD
+#define GL_MAX_COMPUTE_SHARED_MEMORY_SIZE 0x8262
+#define GL_MAX_COMPUTE_UNIFORM_COMPONENTS 0x8263
+#define GL_MAX_COMPUTE_ATOMIC_COUNTER_BUFFERS 0x8264
+#define GL_MAX_COMPUTE_ATOMIC_COUNTERS 0x8265
+#define GL_MAX_COMBINED_COMPUTE_UNIFORM_COMPONENTS 0x8266
+#define GL_MAX_COMPUTE_WORK_GROUP_INVOCATIONS 0x90EB
+#define GL_MAX_COMPUTE_WORK_GROUP_COUNT 0x91BE
+#define GL_MAX_COMPUTE_WORK_GROUP_SIZE 0x91BF
+#define GL_COMPUTE_WORK_GROUP_SIZE 0x8267
+#define GL_UNIFORM_BLOCK_REFERENCED_BY_COMPUTE_SHADER 0x90EC
+#define GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_COMPUTE_SHADER 0x90ED
+#define GL_DISPATCH_INDIRECT_BUFFER 0x90EE
+#define GL_DISPATCH_INDIRECT_BUFFER_BINDING 0x90EF
+#define GL_COMPUTE_SHADER_BIT 0x00000020
+#define GL_DEBUG_OUTPUT_SYNCHRONOUS 0x8242
+#define GL_DEBUG_NEXT_LOGGED_MESSAGE_LENGTH 0x8243
+#define GL_DEBUG_CALLBACK_FUNCTION 0x8244
+#define GL_DEBUG_CALLBACK_USER_PARAM 0x8245
+#define GL_DEBUG_SOURCE_API 0x8246
+#define GL_DEBUG_SOURCE_WINDOW_SYSTEM 0x8247
+#define GL_DEBUG_SOURCE_SHADER_COMPILER 0x8248
+#define GL_DEBUG_SOURCE_THIRD_PARTY 0x8249
+#define GL_DEBUG_SOURCE_APPLICATION 0x824A
+#define GL_DEBUG_SOURCE_OTHER 0x824B
+#define GL_DEBUG_TYPE_ERROR 0x824C
+#define GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR 0x824D
+#define GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR 0x824E
+#define GL_DEBUG_TYPE_PORTABILITY 0x824F
+#define GL_DEBUG_TYPE_PERFORMANCE 0x8250
+#define GL_DEBUG_TYPE_OTHER 0x8251
+#define GL_MAX_DEBUG_MESSAGE_LENGTH 0x9143
+#define GL_MAX_DEBUG_LOGGED_MESSAGES 0x9144
+#define GL_DEBUG_LOGGED_MESSAGES 0x9145
+#define GL_DEBUG_SEVERITY_HIGH 0x9146
+#define GL_DEBUG_SEVERITY_MEDIUM 0x9147
+#define GL_DEBUG_SEVERITY_LOW 0x9148
+#define GL_DEBUG_TYPE_MARKER 0x8268
+#define GL_DEBUG_TYPE_PUSH_GROUP 0x8269
+#define GL_DEBUG_TYPE_POP_GROUP 0x826A
+#define GL_DEBUG_SEVERITY_NOTIFICATION 0x826B
+#define GL_MAX_DEBUG_GROUP_STACK_DEPTH 0x826C
+#define GL_DEBUG_GROUP_STACK_DEPTH 0x826D
+#define GL_BUFFER 0x82E0
+#define GL_SHADER 0x82E1
+#define GL_PROGRAM 0x82E2
+#define GL_VERTEX_ARRAY 0x8074
+#define GL_QUERY 0x82E3
+#define GL_PROGRAM_PIPELINE 0x82E4
+#define GL_SAMPLER 0x82E6
+#define GL_MAX_LABEL_LENGTH 0x82E8
+#define GL_DEBUG_OUTPUT 0x92E0
+#define GL_CONTEXT_FLAG_DEBUG_BIT 0x00000002
+#define GL_MAX_UNIFORM_LOCATIONS 0x826E
+#define GL_FRAMEBUFFER_DEFAULT_WIDTH 0x9310
+#define GL_FRAMEBUFFER_DEFAULT_HEIGHT 0x9311
+#define GL_FRAMEBUFFER_DEFAULT_LAYERS 0x9312
+#define GL_FRAMEBUFFER_DEFAULT_SAMPLES 0x9313
+#define GL_FRAMEBUFFER_DEFAULT_FIXED_SAMPLE_LOCATIONS 0x9314
+#define GL_MAX_FRAMEBUFFER_WIDTH 0x9315
+#define GL_MAX_FRAMEBUFFER_HEIGHT 0x9316
+#define GL_MAX_FRAMEBUFFER_LAYERS 0x9317
+#define GL_MAX_FRAMEBUFFER_SAMPLES 0x9318
+#define GL_INTERNALFORMAT_SUPPORTED 0x826F
+#define GL_INTERNALFORMAT_PREFERRED 0x8270
+#define GL_INTERNALFORMAT_RED_SIZE 0x8271
+#define GL_INTERNALFORMAT_GREEN_SIZE 0x8272
+#define GL_INTERNALFORMAT_BLUE_SIZE 0x8273
+#define GL_INTERNALFORMAT_ALPHA_SIZE 0x8274
+#define GL_INTERNALFORMAT_DEPTH_SIZE 0x8275
+#define GL_INTERNALFORMAT_STENCIL_SIZE 0x8276
+#define GL_INTERNALFORMAT_SHARED_SIZE 0x8277
+#define GL_INTERNALFORMAT_RED_TYPE 0x8278
+#define GL_INTERNALFORMAT_GREEN_TYPE 0x8279
+#define GL_INTERNALFORMAT_BLUE_TYPE 0x827A
+#define GL_INTERNALFORMAT_ALPHA_TYPE 0x827B
+#define GL_INTERNALFORMAT_DEPTH_TYPE 0x827C
+#define GL_INTERNALFORMAT_STENCIL_TYPE 0x827D
+#define GL_MAX_WIDTH 0x827E
+#define GL_MAX_HEIGHT 0x827F
+#define GL_MAX_DEPTH 0x8280
+#define GL_MAX_LAYERS 0x8281
+#define GL_MAX_COMBINED_DIMENSIONS 0x8282
+#define GL_COLOR_COMPONENTS 0x8283
+#define GL_DEPTH_COMPONENTS 0x8284
+#define GL_STENCIL_COMPONENTS 0x8285
+#define GL_COLOR_RENDERABLE 0x8286
+#define GL_DEPTH_RENDERABLE 0x8287
+#define GL_STENCIL_RENDERABLE 0x8288
+#define GL_FRAMEBUFFER_RENDERABLE 0x8289
+#define GL_FRAMEBUFFER_RENDERABLE_LAYERED 0x828A
+#define GL_FRAMEBUFFER_BLEND 0x828B
+#define GL_READ_PIXELS 0x828C
+#define GL_READ_PIXELS_FORMAT 0x828D
+#define GL_READ_PIXELS_TYPE 0x828E
+#define GL_TEXTURE_IMAGE_FORMAT 0x828F
+#define GL_TEXTURE_IMAGE_TYPE 0x8290
+#define GL_GET_TEXTURE_IMAGE_FORMAT 0x8291
+#define GL_GET_TEXTURE_IMAGE_TYPE 0x8292
+#define GL_MIPMAP 0x8293
+#define GL_MANUAL_GENERATE_MIPMAP 0x8294
+#define GL_AUTO_GENERATE_MIPMAP 0x8295
+#define GL_COLOR_ENCODING 0x8296
+#define GL_SRGB_READ 0x8297
+#define GL_SRGB_WRITE 0x8298
+#define GL_FILTER 0x829A
+#define GL_VERTEX_TEXTURE 0x829B
+#define GL_TESS_CONTROL_TEXTURE 0x829C
+#define GL_TESS_EVALUATION_TEXTURE 0x829D
+#define GL_GEOMETRY_TEXTURE 0x829E
+#define GL_FRAGMENT_TEXTURE 0x829F
+#define GL_COMPUTE_TEXTURE 0x82A0
+#define GL_TEXTURE_SHADOW 0x82A1
+#define GL_TEXTURE_GATHER 0x82A2
+#define GL_TEXTURE_GATHER_SHADOW 0x82A3
+#define GL_SHADER_IMAGE_LOAD 0x82A4
+#define GL_SHADER_IMAGE_STORE 0x82A5
+#define GL_SHADER_IMAGE_ATOMIC 0x82A6
+#define GL_IMAGE_TEXEL_SIZE 0x82A7
+#define GL_IMAGE_COMPATIBILITY_CLASS 0x82A8
+#define GL_IMAGE_PIXEL_FORMAT 0x82A9
+#define GL_IMAGE_PIXEL_TYPE 0x82AA
+#define GL_SIMULTANEOUS_TEXTURE_AND_DEPTH_TEST 0x82AC
+#define GL_SIMULTANEOUS_TEXTURE_AND_STENCIL_TEST 0x82AD
+#define GL_SIMULTANEOUS_TEXTURE_AND_DEPTH_WRITE 0x82AE
+#define GL_SIMULTANEOUS_TEXTURE_AND_STENCIL_WRITE 0x82AF
+#define GL_TEXTURE_COMPRESSED_BLOCK_WIDTH 0x82B1
+#define GL_TEXTURE_COMPRESSED_BLOCK_HEIGHT 0x82B2
+#define GL_TEXTURE_COMPRESSED_BLOCK_SIZE 0x82B3
+#define GL_CLEAR_BUFFER 0x82B4
+#define GL_TEXTURE_VIEW 0x82B5
+#define GL_VIEW_COMPATIBILITY_CLASS 0x82B6
+#define GL_FULL_SUPPORT 0x82B7
+#define GL_CAVEAT_SUPPORT 0x82B8
+#define GL_IMAGE_CLASS_4_X_32 0x82B9
+#define GL_IMAGE_CLASS_2_X_32 0x82BA
+#define GL_IMAGE_CLASS_1_X_32 0x82BB
+#define GL_IMAGE_CLASS_4_X_16 0x82BC
+#define GL_IMAGE_CLASS_2_X_16 0x82BD
+#define GL_IMAGE_CLASS_1_X_16 0x82BE
+#define GL_IMAGE_CLASS_4_X_8 0x82BF
+#define GL_IMAGE_CLASS_2_X_8 0x82C0
+#define GL_IMAGE_CLASS_1_X_8 0x82C1
+#define GL_IMAGE_CLASS_11_11_10 0x82C2
+#define GL_IMAGE_CLASS_10_10_10_2 0x82C3
+#define GL_VIEW_CLASS_128_BITS 0x82C4
+#define GL_VIEW_CLASS_96_BITS 0x82C5
+#define GL_VIEW_CLASS_64_BITS 0x82C6
+#define GL_VIEW_CLASS_48_BITS 0x82C7
+#define GL_VIEW_CLASS_32_BITS 0x82C8
+#define GL_VIEW_CLASS_24_BITS 0x82C9
+#define GL_VIEW_CLASS_16_BITS 0x82CA
+#define GL_VIEW_CLASS_8_BITS 0x82CB
+#define GL_VIEW_CLASS_S3TC_DXT1_RGB 0x82CC
+#define GL_VIEW_CLASS_S3TC_DXT1_RGBA 0x82CD
+#define GL_VIEW_CLASS_S3TC_DXT3_RGBA 0x82CE
+#define GL_VIEW_CLASS_S3TC_DXT5_RGBA 0x82CF
+#define GL_VIEW_CLASS_RGTC1_RED 0x82D0
+#define GL_VIEW_CLASS_RGTC2_RG 0x82D1
+#define GL_VIEW_CLASS_BPTC_UNORM 0x82D2
+#define GL_VIEW_CLASS_BPTC_FLOAT 0x82D3
+#define GL_UNIFORM 0x92E1
+#define GL_UNIFORM_BLOCK 0x92E2
+#define GL_PROGRAM_INPUT 0x92E3
+#define GL_PROGRAM_OUTPUT 0x92E4
+#define GL_BUFFER_VARIABLE 0x92E5
+#define GL_SHADER_STORAGE_BLOCK 0x92E6
+#define GL_VERTEX_SUBROUTINE 0x92E8
+#define GL_TESS_CONTROL_SUBROUTINE 0x92E9
+#define GL_TESS_EVALUATION_SUBROUTINE 0x92EA
+#define GL_GEOMETRY_SUBROUTINE 0x92EB
+#define GL_FRAGMENT_SUBROUTINE 0x92EC
+#define GL_COMPUTE_SUBROUTINE 0x92ED
+#define GL_VERTEX_SUBROUTINE_UNIFORM 0x92EE
+#define GL_TESS_CONTROL_SUBROUTINE_UNIFORM 0x92EF
+#define GL_TESS_EVALUATION_SUBROUTINE_UNIFORM 0x92F0
+#define GL_GEOMETRY_SUBROUTINE_UNIFORM 0x92F1
+#define GL_FRAGMENT_SUBROUTINE_UNIFORM 0x92F2
+#define GL_COMPUTE_SUBROUTINE_UNIFORM 0x92F3
+#define GL_TRANSFORM_FEEDBACK_VARYING 0x92F4
+#define GL_ACTIVE_RESOURCES 0x92F5
+#define GL_MAX_NAME_LENGTH 0x92F6
+#define GL_MAX_NUM_ACTIVE_VARIABLES 0x92F7
+#define GL_MAX_NUM_COMPATIBLE_SUBROUTINES 0x92F8
+#define GL_NAME_LENGTH 0x92F9
+#define GL_TYPE 0x92FA
+#define GL_ARRAY_SIZE 0x92FB
+#define GL_OFFSET 0x92FC
+#define GL_BLOCK_INDEX 0x92FD
+#define GL_ARRAY_STRIDE 0x92FE
+#define GL_MATRIX_STRIDE 0x92FF
+#define GL_IS_ROW_MAJOR 0x9300
+#define GL_ATOMIC_COUNTER_BUFFER_INDEX 0x9301
+#define GL_BUFFER_BINDING 0x9302
+#define GL_BUFFER_DATA_SIZE 0x9303
+#define GL_NUM_ACTIVE_VARIABLES 0x9304
+#define GL_ACTIVE_VARIABLES 0x9305
+#define GL_REFERENCED_BY_VERTEX_SHADER 0x9306
+#define GL_REFERENCED_BY_TESS_CONTROL_SHADER 0x9307
+#define GL_REFERENCED_BY_TESS_EVALUATION_SHADER 0x9308
+#define GL_REFERENCED_BY_GEOMETRY_SHADER 0x9309
+#define GL_REFERENCED_BY_FRAGMENT_SHADER 0x930A
+#define GL_REFERENCED_BY_COMPUTE_SHADER 0x930B
+#define GL_TOP_LEVEL_ARRAY_SIZE 0x930C
+#define GL_TOP_LEVEL_ARRAY_STRIDE 0x930D
+#define GL_LOCATION 0x930E
+#define GL_LOCATION_INDEX 0x930F
+#define GL_IS_PER_PATCH 0x92E7
+#define GL_SHADER_STORAGE_BUFFER 0x90D2
+#define GL_SHADER_STORAGE_BUFFER_BINDING 0x90D3
+#define GL_SHADER_STORAGE_BUFFER_START 0x90D4
+#define GL_SHADER_STORAGE_BUFFER_SIZE 0x90D5
+#define GL_MAX_VERTEX_SHADER_STORAGE_BLOCKS 0x90D6
+#define GL_MAX_GEOMETRY_SHADER_STORAGE_BLOCKS 0x90D7
+#define GL_MAX_TESS_CONTROL_SHADER_STORAGE_BLOCKS 0x90D8
+#define GL_MAX_TESS_EVALUATION_SHADER_STORAGE_BLOCKS 0x90D9
+#define GL_MAX_FRAGMENT_SHADER_STORAGE_BLOCKS 0x90DA
+#define GL_MAX_COMPUTE_SHADER_STORAGE_BLOCKS 0x90DB
+#define GL_MAX_COMBINED_SHADER_STORAGE_BLOCKS 0x90DC
+#define GL_MAX_SHADER_STORAGE_BUFFER_BINDINGS 0x90DD
+#define GL_MAX_SHADER_STORAGE_BLOCK_SIZE 0x90DE
+#define GL_SHADER_STORAGE_BUFFER_OFFSET_ALIGNMENT 0x90DF
+#define GL_SHADER_STORAGE_BARRIER_BIT 0x00002000
+#define GL_MAX_COMBINED_SHADER_OUTPUT_RESOURCES 0x8F39
+#define GL_DEPTH_STENCIL_TEXTURE_MODE 0x90EA
+#define GL_TEXTURE_BUFFER_OFFSET 0x919D
+#define GL_TEXTURE_BUFFER_SIZE 0x919E
+#define GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT 0x919F
+#define GL_TEXTURE_VIEW_MIN_LEVEL 0x82DB
+#define GL_TEXTURE_VIEW_NUM_LEVELS 0x82DC
+#define GL_TEXTURE_VIEW_MIN_LAYER 0x82DD
+#define GL_TEXTURE_VIEW_NUM_LAYERS 0x82DE
+#define GL_TEXTURE_IMMUTABLE_LEVELS 0x82DF
+#define GL_VERTEX_ATTRIB_BINDING 0x82D4
+#define GL_VERTEX_ATTRIB_RELATIVE_OFFSET 0x82D5
+#define GL_VERTEX_BINDING_DIVISOR 0x82D6
+#define GL_VERTEX_BINDING_OFFSET 0x82D7
+#define GL_VERTEX_BINDING_STRIDE 0x82D8
+#define GL_MAX_VERTEX_ATTRIB_RELATIVE_OFFSET 0x82D9
+#define GL_MAX_VERTEX_ATTRIB_BINDINGS 0x82DA
+#define GL_VERTEX_BINDING_BUFFER 0x8F4F
+#define GL_DISPLAY_LIST 0x82E7
+#define GL_STACK_UNDERFLOW 0x0504
+#define GL_STACK_OVERFLOW 0x0503
+#define GL_MAX_VERTEX_ATTRIB_STRIDE 0x82E5
+#define GL_PRIMITIVE_RESTART_FOR_PATCHES_SUPPORTED 0x8221
+#define GL_TEXTURE_BUFFER_BINDING 0x8C2A
+#define GL_MAP_PERSISTENT_BIT 0x0040
+#define GL_MAP_COHERENT_BIT 0x0080
+#define GL_DYNAMIC_STORAGE_BIT 0x0100
+#define GL_CLIENT_STORAGE_BIT 0x0200
+#define GL_CLIENT_MAPPED_BUFFER_BARRIER_BIT 0x00004000
+#define GL_BUFFER_IMMUTABLE_STORAGE 0x821F
+#define GL_BUFFER_STORAGE_FLAGS 0x8220
+#define GL_CLEAR_TEXTURE 0x9365
+#define GL_LOCATION_COMPONENT 0x934A
+#define GL_TRANSFORM_FEEDBACK_BUFFER_INDEX 0x934B
+#define GL_TRANSFORM_FEEDBACK_BUFFER_STRIDE 0x934C
+#define GL_QUERY_BUFFER 0x9192
+#define GL_QUERY_BUFFER_BARRIER_BIT 0x00008000
+#define GL_QUERY_BUFFER_BINDING 0x9193
+#define GL_QUERY_RESULT_NO_WAIT 0x9194
+#define GL_MIRROR_CLAMP_TO_EDGE 0x8743
+#define GL_CONTEXT_LOST 0x0507
+#define GL_NEGATIVE_ONE_TO_ONE 0x935E
+#define GL_ZERO_TO_ONE 0x935F
+#define GL_CLIP_ORIGIN 0x935C
+#define GL_CLIP_DEPTH_MODE 0x935D
+#define GL_QUERY_WAIT_INVERTED 0x8E17
+#define GL_QUERY_NO_WAIT_INVERTED 0x8E18
+#define GL_QUERY_BY_REGION_WAIT_INVERTED 0x8E19
+#define GL_QUERY_BY_REGION_NO_WAIT_INVERTED 0x8E1A
+#define GL_MAX_CULL_DISTANCES 0x82F9
+#define GL_MAX_COMBINED_CLIP_AND_CULL_DISTANCES 0x82FA
+#define GL_TEXTURE_TARGET 0x1006
+#define GL_QUERY_TARGET 0x82EA
+#define GL_GUILTY_CONTEXT_RESET 0x8253
+#define GL_INNOCENT_CONTEXT_RESET 0x8254
+#define GL_UNKNOWN_CONTEXT_RESET 0x8255
+#define GL_RESET_NOTIFICATION_STRATEGY 0x8256
+#define GL_LOSE_CONTEXT_ON_RESET 0x8252
+#define GL_NO_RESET_NOTIFICATION 0x8261
+#define GL_CONTEXT_FLAG_ROBUST_ACCESS_BIT 0x00000004
+#define GL_CONTEXT_RELEASE_BEHAVIOR 0x82FB
+#define GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH 0x82FC
+#define GL_SHADER_BINARY_FORMAT_SPIR_V 0x9551
+#define GL_SPIR_V_BINARY 0x9552
+#define GL_PARAMETER_BUFFER 0x80EE
+#define GL_PARAMETER_BUFFER_BINDING 0x80EF
+#define GL_CONTEXT_FLAG_NO_ERROR_BIT 0x00000008
+#define GL_VERTICES_SUBMITTED 0x82EE
+#define GL_PRIMITIVES_SUBMITTED 0x82EF
+#define GL_VERTEX_SHADER_INVOCATIONS 0x82F0
+#define GL_TESS_CONTROL_SHADER_PATCHES 0x82F1
+#define GL_TESS_EVALUATION_SHADER_INVOCATIONS 0x82F2
+#define GL_GEOMETRY_SHADER_PRIMITIVES_EMITTED 0x82F3
+#define GL_FRAGMENT_SHADER_INVOCATIONS 0x82F4
+#define GL_COMPUTE_SHADER_INVOCATIONS 0x82F5
+#define GL_CLIPPING_INPUT_PRIMITIVES 0x82F6
+#define GL_CLIPPING_OUTPUT_PRIMITIVES 0x82F7
+#define GL_POLYGON_OFFSET_CLAMP 0x8E1B
+#define GL_SPIR_V_EXTENSIONS 0x9553
+#define GL_NUM_SPIR_V_EXTENSIONS 0x9554
+#define GL_TEXTURE_MAX_ANISOTROPY 0x84FE
+#define GL_MAX_TEXTURE_MAX_ANISOTROPY 0x84FF
+#define GL_TRANSFORM_FEEDBACK_OVERFLOW 0x82EC
+#define GL_TRANSFORM_FEEDBACK_STREAM_OVERFLOW 0x82ED
+#define GL_ALIASED_POINT_SIZE_RANGE 0x846D
+#define GL_RED_BITS 0x0D52
+#define GL_GREEN_BITS 0x0D53
+#define GL_BLUE_BITS 0x0D54
+#define GL_ALPHA_BITS 0x0D55
+#define GL_DEPTH_BITS 0x0D56
+#define GL_STENCIL_BITS 0x0D57
+#define GL_GENERATE_MIPMAP_HINT 0x8192
+#define GL_LUMINANCE 0x1909
+#define GL_LUMINANCE_ALPHA 0x190A
+#define GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS 0x8CD9
+#define GL_MULTISAMPLE_LINE_WIDTH_RANGE 0x9381
+#define GL_MULTISAMPLE_LINE_WIDTH_GRANULARITY 0x9382
+#define GL_MULTIPLY 0x9294
+#define GL_SCREEN 0x9295
+#define GL_OVERLAY 0x9296
+#define GL_DARKEN 0x9297
+#define GL_LIGHTEN 0x9298
+#define GL_COLORDODGE 0x9299
+#define GL_COLORBURN 0x929A
+#define GL_HARDLIGHT 0x929B
+#define GL_SOFTLIGHT 0x929C
+#define GL_DIFFERENCE 0x929E
+#define GL_EXCLUSION 0x92A0
+#define GL_HSL_HUE 0x92AD
+#define GL_HSL_SATURATION 0x92AE
+#define GL_HSL_COLOR 0x92AF
+#define GL_HSL_LUMINOSITY 0x92B0
+#define GL_PRIMITIVE_BOUNDING_BOX 0x92BE
+#define GL_COMPRESSED_RGBA_ASTC_4x4 0x93B0
+#define GL_COMPRESSED_RGBA_ASTC_5x4 0x93B1
+#define GL_COMPRESSED_RGBA_ASTC_5x5 0x93B2
+#define GL_COMPRESSED_RGBA_ASTC_6x5 0x93B3
+#define GL_COMPRESSED_RGBA_ASTC_6x6 0x93B4
+#define GL_COMPRESSED_RGBA_ASTC_8x5 0x93B5
+#define GL_COMPRESSED_RGBA_ASTC_8x6 0x93B6
+#define GL_COMPRESSED_RGBA_ASTC_8x8 0x93B7
+#define GL_COMPRESSED_RGBA_ASTC_10x5 0x93B8
+#define GL_COMPRESSED_RGBA_ASTC_10x6 0x93B9
+#define GL_COMPRESSED_RGBA_ASTC_10x8 0x93BA
+#define GL_COMPRESSED_RGBA_ASTC_10x10 0x93BB
+#define GL_COMPRESSED_RGBA_ASTC_12x10 0x93BC
+#define GL_COMPRESSED_RGBA_ASTC_12x12 0x93BD
+#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4 0x93D0
+#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4 0x93D1
+#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5 0x93D2
+#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5 0x93D3
+#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6 0x93D4
+#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5 0x93D5
+#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6 0x93D6
+#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8 0x93D7
+#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5 0x93D8
+#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6 0x93D9
+#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8 0x93DA
+#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10 0x93DB
+#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10 0x93DC
+#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12 0x93DD
+#ifndef GL_VERSION_1_0
+#define GL_VERSION_1_0 1
+GLAPI int GLAD_GL_VERSION_1_0;
+typedef void (APIENTRYP PFNGLCULLFACEPROC)(GLenum mode);
+GLAPI PFNGLCULLFACEPROC glad_glCullFace;
+#define glCullFace glad_glCullFace
+typedef void (APIENTRYP PFNGLFRONTFACEPROC)(GLenum mode);
+GLAPI PFNGLFRONTFACEPROC glad_glFrontFace;
+#define glFrontFace glad_glFrontFace
+typedef void (APIENTRYP PFNGLHINTPROC)(GLenum target, GLenum mode);
+GLAPI PFNGLHINTPROC glad_glHint;
+#define glHint glad_glHint
+typedef void (APIENTRYP PFNGLLINEWIDTHPROC)(GLfloat width);
+GLAPI PFNGLLINEWIDTHPROC glad_glLineWidth;
+#define glLineWidth glad_glLineWidth
+typedef void (APIENTRYP PFNGLPOINTSIZEPROC)(GLfloat size);
+GLAPI PFNGLPOINTSIZEPROC glad_glPointSize;
+#define glPointSize glad_glPointSize
+typedef void (APIENTRYP PFNGLPOLYGONMODEPROC)(GLenum face, GLenum mode);
+GLAPI PFNGLPOLYGONMODEPROC glad_glPolygonMode;
+#define glPolygonMode glad_glPolygonMode
+typedef void (APIENTRYP PFNGLSCISSORPROC)(GLint x, GLint y, GLsizei width, GLsizei height);
+GLAPI PFNGLSCISSORPROC glad_glScissor;
+#define glScissor glad_glScissor
+typedef void (APIENTRYP PFNGLTEXPARAMETERFPROC)(GLenum target, GLenum pname, GLfloat param);
+GLAPI PFNGLTEXPARAMETERFPROC glad_glTexParameterf;
+#define glTexParameterf glad_glTexParameterf
+typedef void (APIENTRYP PFNGLTEXPARAMETERFVPROC)(GLenum target, GLenum pname, const GLfloat *params);
+GLAPI PFNGLTEXPARAMETERFVPROC glad_glTexParameterfv;
+#define glTexParameterfv glad_glTexParameterfv
+typedef void (APIENTRYP PFNGLTEXPARAMETERIPROC)(GLenum target, GLenum pname, GLint param);
+GLAPI PFNGLTEXPARAMETERIPROC glad_glTexParameteri;
+#define glTexParameteri glad_glTexParameteri
+typedef void (APIENTRYP PFNGLTEXPARAMETERIVPROC)(GLenum target, GLenum pname, const GLint *params);
+GLAPI PFNGLTEXPARAMETERIVPROC glad_glTexParameteriv;
+#define glTexParameteriv glad_glTexParameteriv
+typedef void (APIENTRYP PFNGLTEXIMAGE1DPROC)(GLenum target, GLint level, GLint internalformat, GLsizei width, GLint border, GLenum format, GLenum type, const void *pixels);
+GLAPI PFNGLTEXIMAGE1DPROC glad_glTexImage1D;
+#define glTexImage1D glad_glTexImage1D
+typedef void (APIENTRYP PFNGLTEXIMAGE2DPROC)(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const void *pixels);
+GLAPI PFNGLTEXIMAGE2DPROC glad_glTexImage2D;
+#define glTexImage2D glad_glTexImage2D
+typedef void (APIENTRYP PFNGLDRAWBUFFERPROC)(GLenum buf);
+GLAPI PFNGLDRAWBUFFERPROC glad_glDrawBuffer;
+#define glDrawBuffer glad_glDrawBuffer
+typedef void (APIENTRYP PFNGLCLEARPROC)(GLbitfield mask);
+GLAPI PFNGLCLEARPROC glad_glClear;
+#define glClear glad_glClear
+typedef void (APIENTRYP PFNGLCLEARCOLORPROC)(GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha);
+GLAPI PFNGLCLEARCOLORPROC glad_glClearColor;
+#define glClearColor glad_glClearColor
+typedef void (APIENTRYP PFNGLCLEARSTENCILPROC)(GLint s);
+GLAPI PFNGLCLEARSTENCILPROC glad_glClearStencil;
+#define glClearStencil glad_glClearStencil
+typedef void (APIENTRYP PFNGLCLEARDEPTHPROC)(GLdouble depth);
+GLAPI PFNGLCLEARDEPTHPROC glad_glClearDepth;
+#define glClearDepth glad_glClearDepth
+typedef void (APIENTRYP PFNGLSTENCILMASKPROC)(GLuint mask);
+GLAPI PFNGLSTENCILMASKPROC glad_glStencilMask;
+#define glStencilMask glad_glStencilMask
+typedef void (APIENTRYP PFNGLCOLORMASKPROC)(GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha);
+GLAPI PFNGLCOLORMASKPROC glad_glColorMask;
+#define glColorMask glad_glColorMask
+typedef void (APIENTRYP PFNGLDEPTHMASKPROC)(GLboolean flag);
+GLAPI PFNGLDEPTHMASKPROC glad_glDepthMask;
+#define glDepthMask glad_glDepthMask
+typedef void (APIENTRYP PFNGLDISABLEPROC)(GLenum cap);
+GLAPI PFNGLDISABLEPROC glad_glDisable;
+#define glDisable glad_glDisable
+typedef void (APIENTRYP PFNGLENABLEPROC)(GLenum cap);
+GLAPI PFNGLENABLEPROC glad_glEnable;
+#define glEnable glad_glEnable
+typedef void (APIENTRYP PFNGLFINISHPROC)(void);
+GLAPI PFNGLFINISHPROC glad_glFinish;
+#define glFinish glad_glFinish
+typedef void (APIENTRYP PFNGLFLUSHPROC)(void);
+GLAPI PFNGLFLUSHPROC glad_glFlush;
+#define glFlush glad_glFlush
+typedef void (APIENTRYP PFNGLBLENDFUNCPROC)(GLenum sfactor, GLenum dfactor);
+GLAPI PFNGLBLENDFUNCPROC glad_glBlendFunc;
+#define glBlendFunc glad_glBlendFunc
+typedef void (APIENTRYP PFNGLLOGICOPPROC)(GLenum opcode);
+GLAPI PFNGLLOGICOPPROC glad_glLogicOp;
+#define glLogicOp glad_glLogicOp
+typedef void (APIENTRYP PFNGLSTENCILFUNCPROC)(GLenum func, GLint ref, GLuint mask);
+GLAPI PFNGLSTENCILFUNCPROC glad_glStencilFunc;
+#define glStencilFunc glad_glStencilFunc
+typedef void (APIENTRYP PFNGLSTENCILOPPROC)(GLenum fail, GLenum zfail, GLenum zpass);
+GLAPI PFNGLSTENCILOPPROC glad_glStencilOp;
+#define glStencilOp glad_glStencilOp
+typedef void (APIENTRYP PFNGLDEPTHFUNCPROC)(GLenum func);
+GLAPI PFNGLDEPTHFUNCPROC glad_glDepthFunc;
+#define glDepthFunc glad_glDepthFunc
+typedef void (APIENTRYP PFNGLPIXELSTOREFPROC)(GLenum pname, GLfloat param);
+GLAPI PFNGLPIXELSTOREFPROC glad_glPixelStoref;
+#define glPixelStoref glad_glPixelStoref
+typedef void (APIENTRYP PFNGLPIXELSTOREIPROC)(GLenum pname, GLint param);
+GLAPI PFNGLPIXELSTOREIPROC glad_glPixelStorei;
+#define glPixelStorei glad_glPixelStorei
+typedef void (APIENTRYP PFNGLREADBUFFERPROC)(GLenum src);
+GLAPI PFNGLREADBUFFERPROC glad_glReadBuffer;
+#define glReadBuffer glad_glReadBuffer
+typedef void (APIENTRYP PFNGLREADPIXELSPROC)(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, void *pixels);
+GLAPI PFNGLREADPIXELSPROC glad_glReadPixels;
+#define glReadPixels glad_glReadPixels
+typedef void (APIENTRYP PFNGLGETBOOLEANVPROC)(GLenum pname, GLboolean *data);
+GLAPI PFNGLGETBOOLEANVPROC glad_glGetBooleanv;
+#define glGetBooleanv glad_glGetBooleanv
+typedef void (APIENTRYP PFNGLGETDOUBLEVPROC)(GLenum pname, GLdouble *data);
+GLAPI PFNGLGETDOUBLEVPROC glad_glGetDoublev;
+#define glGetDoublev glad_glGetDoublev
+typedef GLenum (APIENTRYP PFNGLGETERRORPROC)(void);
+GLAPI PFNGLGETERRORPROC glad_glGetError;
+#define glGetError glad_glGetError
+typedef void (APIENTRYP PFNGLGETFLOATVPROC)(GLenum pname, GLfloat *data);
+GLAPI PFNGLGETFLOATVPROC glad_glGetFloatv;
+#define glGetFloatv glad_glGetFloatv
+typedef void (APIENTRYP PFNGLGETINTEGERVPROC)(GLenum pname, GLint *data);
+GLAPI PFNGLGETINTEGERVPROC glad_glGetIntegerv;
+#define glGetIntegerv glad_glGetIntegerv
+typedef const GLubyte * (APIENTRYP PFNGLGETSTRINGPROC)(GLenum name);
+GLAPI PFNGLGETSTRINGPROC glad_glGetString;
+#define glGetString glad_glGetString
+typedef void (APIENTRYP PFNGLGETTEXIMAGEPROC)(GLenum target, GLint level, GLenum format, GLenum type, void *pixels);
+GLAPI PFNGLGETTEXIMAGEPROC glad_glGetTexImage;
+#define glGetTexImage glad_glGetTexImage
+typedef void (APIENTRYP PFNGLGETTEXPARAMETERFVPROC)(GLenum target, GLenum pname, GLfloat *params);
+GLAPI PFNGLGETTEXPARAMETERFVPROC glad_glGetTexParameterfv;
+#define glGetTexParameterfv glad_glGetTexParameterfv
+typedef void (APIENTRYP PFNGLGETTEXPARAMETERIVPROC)(GLenum target, GLenum pname, GLint *params);
+GLAPI PFNGLGETTEXPARAMETERIVPROC glad_glGetTexParameteriv;
+#define glGetTexParameteriv glad_glGetTexParameteriv
+typedef void (APIENTRYP PFNGLGETTEXLEVELPARAMETERFVPROC)(GLenum target, GLint level, GLenum pname, GLfloat *params);
+GLAPI PFNGLGETTEXLEVELPARAMETERFVPROC glad_glGetTexLevelParameterfv;
+#define glGetTexLevelParameterfv glad_glGetTexLevelParameterfv
+typedef void (APIENTRYP PFNGLGETTEXLEVELPARAMETERIVPROC)(GLenum target, GLint level, GLenum pname, GLint *params);
+GLAPI PFNGLGETTEXLEVELPARAMETERIVPROC glad_glGetTexLevelParameteriv;
+#define glGetTexLevelParameteriv glad_glGetTexLevelParameteriv
+typedef GLboolean (APIENTRYP PFNGLISENABLEDPROC)(GLenum cap);
+GLAPI PFNGLISENABLEDPROC glad_glIsEnabled;
+#define glIsEnabled glad_glIsEnabled
+typedef void (APIENTRYP PFNGLDEPTHRANGEPROC)(GLdouble n, GLdouble f);
+GLAPI PFNGLDEPTHRANGEPROC glad_glDepthRange;
+#define glDepthRange glad_glDepthRange
+typedef void (APIENTRYP PFNGLVIEWPORTPROC)(GLint x, GLint y, GLsizei width, GLsizei height);
+GLAPI PFNGLVIEWPORTPROC glad_glViewport;
+#define glViewport glad_glViewport
+#endif
+#ifndef GL_VERSION_1_1
+#define GL_VERSION_1_1 1
+GLAPI int GLAD_GL_VERSION_1_1;
+typedef void (APIENTRYP PFNGLDRAWARRAYSPROC)(GLenum mode, GLint first, GLsizei count);
+GLAPI PFNGLDRAWARRAYSPROC glad_glDrawArrays;
+#define glDrawArrays glad_glDrawArrays
+typedef void (APIENTRYP PFNGLDRAWELEMENTSPROC)(GLenum mode, GLsizei count, GLenum type, const void *indices);
+GLAPI PFNGLDRAWELEMENTSPROC glad_glDrawElements;
+#define glDrawElements glad_glDrawElements
+typedef void (APIENTRYP PFNGLPOLYGONOFFSETPROC)(GLfloat factor, GLfloat units);
+GLAPI PFNGLPOLYGONOFFSETPROC glad_glPolygonOffset;
+#define glPolygonOffset glad_glPolygonOffset
+typedef void (APIENTRYP PFNGLCOPYTEXIMAGE1DPROC)(GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLint border);
+GLAPI PFNGLCOPYTEXIMAGE1DPROC glad_glCopyTexImage1D;
+#define glCopyTexImage1D glad_glCopyTexImage1D
+typedef void (APIENTRYP PFNGLCOPYTEXIMAGE2DPROC)(GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border);
+GLAPI PFNGLCOPYTEXIMAGE2DPROC glad_glCopyTexImage2D;
+#define glCopyTexImage2D glad_glCopyTexImage2D
+typedef void (APIENTRYP PFNGLCOPYTEXSUBIMAGE1DPROC)(GLenum target, GLint level, GLint xoffset, GLint x, GLint y, GLsizei width);
+GLAPI PFNGLCOPYTEXSUBIMAGE1DPROC glad_glCopyTexSubImage1D;
+#define glCopyTexSubImage1D glad_glCopyTexSubImage1D
+typedef void (APIENTRYP PFNGLCOPYTEXSUBIMAGE2DPROC)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
+GLAPI PFNGLCOPYTEXSUBIMAGE2DPROC glad_glCopyTexSubImage2D;
+#define glCopyTexSubImage2D glad_glCopyTexSubImage2D
+typedef void (APIENTRYP PFNGLTEXSUBIMAGE1DPROC)(GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLenum type, const void *pixels);
+GLAPI PFNGLTEXSUBIMAGE1DPROC glad_glTexSubImage1D;
+#define glTexSubImage1D glad_glTexSubImage1D
+typedef void (APIENTRYP PFNGLTEXSUBIMAGE2DPROC)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const void *pixels);
+GLAPI PFNGLTEXSUBIMAGE2DPROC glad_glTexSubImage2D;
+#define glTexSubImage2D glad_glTexSubImage2D
+typedef void (APIENTRYP PFNGLBINDTEXTUREPROC)(GLenum target, GLuint texture);
+GLAPI PFNGLBINDTEXTUREPROC glad_glBindTexture;
+#define glBindTexture glad_glBindTexture
+typedef void (APIENTRYP PFNGLDELETETEXTURESPROC)(GLsizei n, const GLuint *textures);
+GLAPI PFNGLDELETETEXTURESPROC glad_glDeleteTextures;
+#define glDeleteTextures glad_glDeleteTextures
+typedef void (APIENTRYP PFNGLGENTEXTURESPROC)(GLsizei n, GLuint *textures);
+GLAPI PFNGLGENTEXTURESPROC glad_glGenTextures;
+#define glGenTextures glad_glGenTextures
+typedef GLboolean (APIENTRYP PFNGLISTEXTUREPROC)(GLuint texture);
+GLAPI PFNGLISTEXTUREPROC glad_glIsTexture;
+#define glIsTexture glad_glIsTexture
+#endif
+#ifndef GL_VERSION_1_2
+#define GL_VERSION_1_2 1
+GLAPI int GLAD_GL_VERSION_1_2;
+typedef void (APIENTRYP PFNGLDRAWRANGEELEMENTSPROC)(GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const void *indices);
+GLAPI PFNGLDRAWRANGEELEMENTSPROC glad_glDrawRangeElements;
+#define glDrawRangeElements glad_glDrawRangeElements
+typedef void (APIENTRYP PFNGLTEXIMAGE3DPROC)(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const void *pixels);
+GLAPI PFNGLTEXIMAGE3DPROC glad_glTexImage3D;
+#define glTexImage3D glad_glTexImage3D
+typedef void (APIENTRYP PFNGLTEXSUBIMAGE3DPROC)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const void *pixels);
+GLAPI PFNGLTEXSUBIMAGE3DPROC glad_glTexSubImage3D;
+#define glTexSubImage3D glad_glTexSubImage3D
+typedef void (APIENTRYP PFNGLCOPYTEXSUBIMAGE3DPROC)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height);
+GLAPI PFNGLCOPYTEXSUBIMAGE3DPROC glad_glCopyTexSubImage3D;
+#define glCopyTexSubImage3D glad_glCopyTexSubImage3D
+#endif
+#ifndef GL_VERSION_1_3
+#define GL_VERSION_1_3 1
+GLAPI int GLAD_GL_VERSION_1_3;
+typedef void (APIENTRYP PFNGLACTIVETEXTUREPROC)(GLenum texture);
+GLAPI PFNGLACTIVETEXTUREPROC glad_glActiveTexture;
+#define glActiveTexture glad_glActiveTexture
+typedef void (APIENTRYP PFNGLSAMPLECOVERAGEPROC)(GLfloat value, GLboolean invert);
+GLAPI PFNGLSAMPLECOVERAGEPROC glad_glSampleCoverage;
+#define glSampleCoverage glad_glSampleCoverage
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXIMAGE3DPROC)(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLsizei imageSize, const void *data);
+GLAPI PFNGLCOMPRESSEDTEXIMAGE3DPROC glad_glCompressedTexImage3D;
+#define glCompressedTexImage3D glad_glCompressedTexImage3D
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXIMAGE2DPROC)(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLsizei imageSize, const void *data);
+GLAPI PFNGLCOMPRESSEDTEXIMAGE2DPROC glad_glCompressedTexImage2D;
+#define glCompressedTexImage2D glad_glCompressedTexImage2D
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXIMAGE1DPROC)(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLsizei imageSize, const void *data);
+GLAPI PFNGLCOMPRESSEDTEXIMAGE1DPROC glad_glCompressedTexImage1D;
+#define glCompressedTexImage1D glad_glCompressedTexImage1D
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXSUBIMAGE3DPROC)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const void *data);
+GLAPI PFNGLCOMPRESSEDTEXSUBIMAGE3DPROC glad_glCompressedTexSubImage3D;
+#define glCompressedTexSubImage3D glad_glCompressedTexSubImage3D
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXSUBIMAGE2DPROC)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const void *data);
+GLAPI PFNGLCOMPRESSEDTEXSUBIMAGE2DPROC glad_glCompressedTexSubImage2D;
+#define glCompressedTexSubImage2D glad_glCompressedTexSubImage2D
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXSUBIMAGE1DPROC)(GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLsizei imageSize, const void *data);
+GLAPI PFNGLCOMPRESSEDTEXSUBIMAGE1DPROC glad_glCompressedTexSubImage1D;
+#define glCompressedTexSubImage1D glad_glCompressedTexSubImage1D
+typedef void (APIENTRYP PFNGLGETCOMPRESSEDTEXIMAGEPROC)(GLenum target, GLint level, void *img);
+GLAPI PFNGLGETCOMPRESSEDTEXIMAGEPROC glad_glGetCompressedTexImage;
+#define glGetCompressedTexImage glad_glGetCompressedTexImage
+#endif
+#ifndef GL_VERSION_1_4
+#define GL_VERSION_1_4 1
+GLAPI int GLAD_GL_VERSION_1_4;
+typedef void (APIENTRYP PFNGLBLENDFUNCSEPARATEPROC)(GLenum sfactorRGB, GLenum dfactorRGB, GLenum sfactorAlpha, GLenum dfactorAlpha);
+GLAPI PFNGLBLENDFUNCSEPARATEPROC glad_glBlendFuncSeparate;
+#define glBlendFuncSeparate glad_glBlendFuncSeparate
+typedef void (APIENTRYP PFNGLMULTIDRAWARRAYSPROC)(GLenum mode, const GLint *first, const GLsizei *count, GLsizei drawcount);
+GLAPI PFNGLMULTIDRAWARRAYSPROC glad_glMultiDrawArrays;
+#define glMultiDrawArrays glad_glMultiDrawArrays
+typedef void (APIENTRYP PFNGLMULTIDRAWELEMENTSPROC)(GLenum mode, const GLsizei *count, GLenum type, const void *const*indices, GLsizei drawcount);
+GLAPI PFNGLMULTIDRAWELEMENTSPROC glad_glMultiDrawElements;
+#define glMultiDrawElements glad_glMultiDrawElements
+typedef void (APIENTRYP PFNGLPOINTPARAMETERFPROC)(GLenum pname, GLfloat param);
+GLAPI PFNGLPOINTPARAMETERFPROC glad_glPointParameterf;
+#define glPointParameterf glad_glPointParameterf
+typedef void (APIENTRYP PFNGLPOINTPARAMETERFVPROC)(GLenum pname, const GLfloat *params);
+GLAPI PFNGLPOINTPARAMETERFVPROC glad_glPointParameterfv;
+#define glPointParameterfv glad_glPointParameterfv
+typedef void (APIENTRYP PFNGLPOINTPARAMETERIPROC)(GLenum pname, GLint param);
+GLAPI PFNGLPOINTPARAMETERIPROC glad_glPointParameteri;
+#define glPointParameteri glad_glPointParameteri
+typedef void (APIENTRYP PFNGLPOINTPARAMETERIVPROC)(GLenum pname, const GLint *params);
+GLAPI PFNGLPOINTPARAMETERIVPROC glad_glPointParameteriv;
+#define glPointParameteriv glad_glPointParameteriv
+typedef void (APIENTRYP PFNGLBLENDCOLORPROC)(GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha);
+GLAPI PFNGLBLENDCOLORPROC glad_glBlendColor;
+#define glBlendColor glad_glBlendColor
+typedef void (APIENTRYP PFNGLBLENDEQUATIONPROC)(GLenum mode);
+GLAPI PFNGLBLENDEQUATIONPROC glad_glBlendEquation;
+#define glBlendEquation glad_glBlendEquation
+#endif
+#ifndef GL_VERSION_1_5
+#define GL_VERSION_1_5 1
+GLAPI int GLAD_GL_VERSION_1_5;
+typedef void (APIENTRYP PFNGLGENQUERIESPROC)(GLsizei n, GLuint *ids);
+GLAPI PFNGLGENQUERIESPROC glad_glGenQueries;
+#define glGenQueries glad_glGenQueries
+typedef void (APIENTRYP PFNGLDELETEQUERIESPROC)(GLsizei n, const GLuint *ids);
+GLAPI PFNGLDELETEQUERIESPROC glad_glDeleteQueries;
+#define glDeleteQueries glad_glDeleteQueries
+typedef GLboolean (APIENTRYP PFNGLISQUERYPROC)(GLuint id);
+GLAPI PFNGLISQUERYPROC glad_glIsQuery;
+#define glIsQuery glad_glIsQuery
+typedef void (APIENTRYP PFNGLBEGINQUERYPROC)(GLenum target, GLuint id);
+GLAPI PFNGLBEGINQUERYPROC glad_glBeginQuery;
+#define glBeginQuery glad_glBeginQuery
+typedef void (APIENTRYP PFNGLENDQUERYPROC)(GLenum target);
+GLAPI PFNGLENDQUERYPROC glad_glEndQuery;
+#define glEndQuery glad_glEndQuery
+typedef void (APIENTRYP PFNGLGETQUERYIVPROC)(GLenum target, GLenum pname, GLint *params);
+GLAPI PFNGLGETQUERYIVPROC glad_glGetQueryiv;
+#define glGetQueryiv glad_glGetQueryiv
+typedef void (APIENTRYP PFNGLGETQUERYOBJECTIVPROC)(GLuint id, GLenum pname, GLint *params);
+GLAPI PFNGLGETQUERYOBJECTIVPROC glad_glGetQueryObjectiv;
+#define glGetQueryObjectiv glad_glGetQueryObjectiv
+typedef void (APIENTRYP PFNGLGETQUERYOBJECTUIVPROC)(GLuint id, GLenum pname, GLuint *params);
+GLAPI PFNGLGETQUERYOBJECTUIVPROC glad_glGetQueryObjectuiv;
+#define glGetQueryObjectuiv glad_glGetQueryObjectuiv
+typedef void (APIENTRYP PFNGLBINDBUFFERPROC)(GLenum target, GLuint buffer);
+GLAPI PFNGLBINDBUFFERPROC glad_glBindBuffer;
+#define glBindBuffer glad_glBindBuffer
+typedef void (APIENTRYP PFNGLDELETEBUFFERSPROC)(GLsizei n, const GLuint *buffers);
+GLAPI PFNGLDELETEBUFFERSPROC glad_glDeleteBuffers;
+#define glDeleteBuffers glad_glDeleteBuffers
+typedef void (APIENTRYP PFNGLGENBUFFERSPROC)(GLsizei n, GLuint *buffers);
+GLAPI PFNGLGENBUFFERSPROC glad_glGenBuffers;
+#define glGenBuffers glad_glGenBuffers
+typedef GLboolean (APIENTRYP PFNGLISBUFFERPROC)(GLuint buffer);
+GLAPI PFNGLISBUFFERPROC glad_glIsBuffer;
+#define glIsBuffer glad_glIsBuffer
+typedef void (APIENTRYP PFNGLBUFFERDATAPROC)(GLenum target, GLsizeiptr size, const void *data, GLenum usage);
+GLAPI PFNGLBUFFERDATAPROC glad_glBufferData;
+#define glBufferData glad_glBufferData
+typedef void (APIENTRYP PFNGLBUFFERSUBDATAPROC)(GLenum target, GLintptr offset, GLsizeiptr size, const void *data);
+GLAPI PFNGLBUFFERSUBDATAPROC glad_glBufferSubData;
+#define glBufferSubData glad_glBufferSubData
+typedef void (APIENTRYP PFNGLGETBUFFERSUBDATAPROC)(GLenum target, GLintptr offset, GLsizeiptr size, void *data);
+GLAPI PFNGLGETBUFFERSUBDATAPROC glad_glGetBufferSubData;
+#define glGetBufferSubData glad_glGetBufferSubData
+typedef void * (APIENTRYP PFNGLMAPBUFFERPROC)(GLenum target, GLenum access);
+GLAPI PFNGLMAPBUFFERPROC glad_glMapBuffer;
+#define glMapBuffer glad_glMapBuffer
+typedef GLboolean (APIENTRYP PFNGLUNMAPBUFFERPROC)(GLenum target);
+GLAPI PFNGLUNMAPBUFFERPROC glad_glUnmapBuffer;
+#define glUnmapBuffer glad_glUnmapBuffer
+typedef void (APIENTRYP PFNGLGETBUFFERPARAMETERIVPROC)(GLenum target, GLenum pname, GLint *params);
+GLAPI PFNGLGETBUFFERPARAMETERIVPROC glad_glGetBufferParameteriv;
+#define glGetBufferParameteriv glad_glGetBufferParameteriv
+typedef void (APIENTRYP PFNGLGETBUFFERPOINTERVPROC)(GLenum target, GLenum pname, void **params);
+GLAPI PFNGLGETBUFFERPOINTERVPROC glad_glGetBufferPointerv;
+#define glGetBufferPointerv glad_glGetBufferPointerv
+#endif
+#ifndef GL_VERSION_2_0
+#define GL_VERSION_2_0 1
+GLAPI int GLAD_GL_VERSION_2_0;
+typedef void (APIENTRYP PFNGLBLENDEQUATIONSEPARATEPROC)(GLenum modeRGB, GLenum modeAlpha);
+GLAPI PFNGLBLENDEQUATIONSEPARATEPROC glad_glBlendEquationSeparate;
+#define glBlendEquationSeparate glad_glBlendEquationSeparate
+typedef void (APIENTRYP PFNGLDRAWBUFFERSPROC)(GLsizei n, const GLenum *bufs);
+GLAPI PFNGLDRAWBUFFERSPROC glad_glDrawBuffers;
+#define glDrawBuffers glad_glDrawBuffers
+typedef void (APIENTRYP PFNGLSTENCILOPSEPARATEPROC)(GLenum face, GLenum sfail, GLenum dpfail, GLenum dppass);
+GLAPI PFNGLSTENCILOPSEPARATEPROC glad_glStencilOpSeparate;
+#define glStencilOpSeparate glad_glStencilOpSeparate
+typedef void (APIENTRYP PFNGLSTENCILFUNCSEPARATEPROC)(GLenum face, GLenum func, GLint ref, GLuint mask);
+GLAPI PFNGLSTENCILFUNCSEPARATEPROC glad_glStencilFuncSeparate;
+#define glStencilFuncSeparate glad_glStencilFuncSeparate
+typedef void (APIENTRYP PFNGLSTENCILMASKSEPARATEPROC)(GLenum face, GLuint mask);
+GLAPI PFNGLSTENCILMASKSEPARATEPROC glad_glStencilMaskSeparate;
+#define glStencilMaskSeparate glad_glStencilMaskSeparate
+typedef void (APIENTRYP PFNGLATTACHSHADERPROC)(GLuint program, GLuint shader);
+GLAPI PFNGLATTACHSHADERPROC glad_glAttachShader;
+#define glAttachShader glad_glAttachShader
+typedef void (APIENTRYP PFNGLBINDATTRIBLOCATIONPROC)(GLuint program, GLuint index, const GLchar *name);
+GLAPI PFNGLBINDATTRIBLOCATIONPROC glad_glBindAttribLocation;
+#define glBindAttribLocation glad_glBindAttribLocation
+typedef void (APIENTRYP PFNGLCOMPILESHADERPROC)(GLuint shader);
+GLAPI PFNGLCOMPILESHADERPROC glad_glCompileShader;
+#define glCompileShader glad_glCompileShader
+typedef GLuint (APIENTRYP PFNGLCREATEPROGRAMPROC)(void);
+GLAPI PFNGLCREATEPROGRAMPROC glad_glCreateProgram;
+#define glCreateProgram glad_glCreateProgram
+typedef GLuint (APIENTRYP PFNGLCREATESHADERPROC)(GLenum type);
+GLAPI PFNGLCREATESHADERPROC glad_glCreateShader;
+#define glCreateShader glad_glCreateShader
+typedef void (APIENTRYP PFNGLDELETEPROGRAMPROC)(GLuint program);
+GLAPI PFNGLDELETEPROGRAMPROC glad_glDeleteProgram;
+#define glDeleteProgram glad_glDeleteProgram
+typedef void (APIENTRYP PFNGLDELETESHADERPROC)(GLuint shader);
+GLAPI PFNGLDELETESHADERPROC glad_glDeleteShader;
+#define glDeleteShader glad_glDeleteShader
+typedef void (APIENTRYP PFNGLDETACHSHADERPROC)(GLuint program, GLuint shader);
+GLAPI PFNGLDETACHSHADERPROC glad_glDetachShader;
+#define glDetachShader glad_glDetachShader
+typedef void (APIENTRYP PFNGLDISABLEVERTEXATTRIBARRAYPROC)(GLuint index);
+GLAPI PFNGLDISABLEVERTEXATTRIBARRAYPROC glad_glDisableVertexAttribArray;
+#define glDisableVertexAttribArray glad_glDisableVertexAttribArray
+typedef void (APIENTRYP PFNGLENABLEVERTEXATTRIBARRAYPROC)(GLuint index);
+GLAPI PFNGLENABLEVERTEXATTRIBARRAYPROC glad_glEnableVertexAttribArray;
+#define glEnableVertexAttribArray glad_glEnableVertexAttribArray
+typedef void (APIENTRYP PFNGLGETACTIVEATTRIBPROC)(GLuint program, GLuint index, GLsizei bufSize, GLsizei *length, GLint *size, GLenum *type, GLchar *name);
+GLAPI PFNGLGETACTIVEATTRIBPROC glad_glGetActiveAttrib;
+#define glGetActiveAttrib glad_glGetActiveAttrib
+typedef void (APIENTRYP PFNGLGETACTIVEUNIFORMPROC)(GLuint program, GLuint index, GLsizei bufSize, GLsizei *length, GLint *size, GLenum *type, GLchar *name);
+GLAPI PFNGLGETACTIVEUNIFORMPROC glad_glGetActiveUniform;
+#define glGetActiveUniform glad_glGetActiveUniform
+typedef void (APIENTRYP PFNGLGETATTACHEDSHADERSPROC)(GLuint program, GLsizei maxCount, GLsizei *count, GLuint *shaders);
+GLAPI PFNGLGETATTACHEDSHADERSPROC glad_glGetAttachedShaders;
+#define glGetAttachedShaders glad_glGetAttachedShaders
+typedef GLint (APIENTRYP PFNGLGETATTRIBLOCATIONPROC)(GLuint program, const GLchar *name);
+GLAPI PFNGLGETATTRIBLOCATIONPROC glad_glGetAttribLocation;
+#define glGetAttribLocation glad_glGetAttribLocation
+typedef void (APIENTRYP PFNGLGETPROGRAMIVPROC)(GLuint program, GLenum pname, GLint *params);
+GLAPI PFNGLGETPROGRAMIVPROC glad_glGetProgramiv;
+#define glGetProgramiv glad_glGetProgramiv
+typedef void (APIENTRYP PFNGLGETPROGRAMINFOLOGPROC)(GLuint program, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
+GLAPI PFNGLGETPROGRAMINFOLOGPROC glad_glGetProgramInfoLog;
+#define glGetProgramInfoLog glad_glGetProgramInfoLog
+typedef void (APIENTRYP PFNGLGETSHADERIVPROC)(GLuint shader, GLenum pname, GLint *params);
+GLAPI PFNGLGETSHADERIVPROC glad_glGetShaderiv;
+#define glGetShaderiv glad_glGetShaderiv
+typedef void (APIENTRYP PFNGLGETSHADERINFOLOGPROC)(GLuint shader, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
+GLAPI PFNGLGETSHADERINFOLOGPROC glad_glGetShaderInfoLog;
+#define glGetShaderInfoLog glad_glGetShaderInfoLog
+typedef void (APIENTRYP PFNGLGETSHADERSOURCEPROC)(GLuint shader, GLsizei bufSize, GLsizei *length, GLchar *source);
+GLAPI PFNGLGETSHADERSOURCEPROC glad_glGetShaderSource;
+#define glGetShaderSource glad_glGetShaderSource
+typedef GLint (APIENTRYP PFNGLGETUNIFORMLOCATIONPROC)(GLuint program, const GLchar *name);
+GLAPI PFNGLGETUNIFORMLOCATIONPROC glad_glGetUniformLocation;
+#define glGetUniformLocation glad_glGetUniformLocation
+typedef void (APIENTRYP PFNGLGETUNIFORMFVPROC)(GLuint program, GLint location, GLfloat *params);
+GLAPI PFNGLGETUNIFORMFVPROC glad_glGetUniformfv;
+#define glGetUniformfv glad_glGetUniformfv
+typedef void (APIENTRYP PFNGLGETUNIFORMIVPROC)(GLuint program, GLint location, GLint *params);
+GLAPI PFNGLGETUNIFORMIVPROC glad_glGetUniformiv;
+#define glGetUniformiv glad_glGetUniformiv
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBDVPROC)(GLuint index, GLenum pname, GLdouble *params);
+GLAPI PFNGLGETVERTEXATTRIBDVPROC glad_glGetVertexAttribdv;
+#define glGetVertexAttribdv glad_glGetVertexAttribdv
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBFVPROC)(GLuint index, GLenum pname, GLfloat *params);
+GLAPI PFNGLGETVERTEXATTRIBFVPROC glad_glGetVertexAttribfv;
+#define glGetVertexAttribfv glad_glGetVertexAttribfv
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBIVPROC)(GLuint index, GLenum pname, GLint *params);
+GLAPI PFNGLGETVERTEXATTRIBIVPROC glad_glGetVertexAttribiv;
+#define glGetVertexAttribiv glad_glGetVertexAttribiv
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBPOINTERVPROC)(GLuint index, GLenum pname, void **pointer);
+GLAPI PFNGLGETVERTEXATTRIBPOINTERVPROC glad_glGetVertexAttribPointerv;
+#define glGetVertexAttribPointerv glad_glGetVertexAttribPointerv
+typedef GLboolean (APIENTRYP PFNGLISPROGRAMPROC)(GLuint program);
+GLAPI PFNGLISPROGRAMPROC glad_glIsProgram;
+#define glIsProgram glad_glIsProgram
+typedef GLboolean (APIENTRYP PFNGLISSHADERPROC)(GLuint shader);
+GLAPI PFNGLISSHADERPROC glad_glIsShader;
+#define glIsShader glad_glIsShader
+typedef void (APIENTRYP PFNGLLINKPROGRAMPROC)(GLuint program);
+GLAPI PFNGLLINKPROGRAMPROC glad_glLinkProgram;
+#define glLinkProgram glad_glLinkProgram
+typedef void (APIENTRYP PFNGLSHADERSOURCEPROC)(GLuint shader, GLsizei count, const GLchar *const*string, const GLint *length);
+GLAPI PFNGLSHADERSOURCEPROC glad_glShaderSource;
+#define glShaderSource glad_glShaderSource
+typedef void (APIENTRYP PFNGLUSEPROGRAMPROC)(GLuint program);
+GLAPI PFNGLUSEPROGRAMPROC glad_glUseProgram;
+#define glUseProgram glad_glUseProgram
+typedef void (APIENTRYP PFNGLUNIFORM1FPROC)(GLint location, GLfloat v0);
+GLAPI PFNGLUNIFORM1FPROC glad_glUniform1f;
+#define glUniform1f glad_glUniform1f
+typedef void (APIENTRYP PFNGLUNIFORM2FPROC)(GLint location, GLfloat v0, GLfloat v1);
+GLAPI PFNGLUNIFORM2FPROC glad_glUniform2f;
+#define glUniform2f glad_glUniform2f
+typedef void (APIENTRYP PFNGLUNIFORM3FPROC)(GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
+GLAPI PFNGLUNIFORM3FPROC glad_glUniform3f;
+#define glUniform3f glad_glUniform3f
+typedef void (APIENTRYP PFNGLUNIFORM4FPROC)(GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
+GLAPI PFNGLUNIFORM4FPROC glad_glUniform4f;
+#define glUniform4f glad_glUniform4f
+typedef void (APIENTRYP PFNGLUNIFORM1IPROC)(GLint location, GLint v0);
+GLAPI PFNGLUNIFORM1IPROC glad_glUniform1i;
+#define glUniform1i glad_glUniform1i
+typedef void (APIENTRYP PFNGLUNIFORM2IPROC)(GLint location, GLint v0, GLint v1);
+GLAPI PFNGLUNIFORM2IPROC glad_glUniform2i;
+#define glUniform2i glad_glUniform2i
+typedef void (APIENTRYP PFNGLUNIFORM3IPROC)(GLint location, GLint v0, GLint v1, GLint v2);
+GLAPI PFNGLUNIFORM3IPROC glad_glUniform3i;
+#define glUniform3i glad_glUniform3i
+typedef void (APIENTRYP PFNGLUNIFORM4IPROC)(GLint location, GLint v0, GLint v1, GLint v2, GLint v3);
+GLAPI PFNGLUNIFORM4IPROC glad_glUniform4i;
+#define glUniform4i glad_glUniform4i
+typedef void (APIENTRYP PFNGLUNIFORM1FVPROC)(GLint location, GLsizei count, const GLfloat *value);
+GLAPI PFNGLUNIFORM1FVPROC glad_glUniform1fv;
+#define glUniform1fv glad_glUniform1fv
+typedef void (APIENTRYP PFNGLUNIFORM2FVPROC)(GLint location, GLsizei count, const GLfloat *value);
+GLAPI PFNGLUNIFORM2FVPROC glad_glUniform2fv;
+#define glUniform2fv glad_glUniform2fv
+typedef void (APIENTRYP PFNGLUNIFORM3FVPROC)(GLint location, GLsizei count, const GLfloat *value);
+GLAPI PFNGLUNIFORM3FVPROC glad_glUniform3fv;
+#define glUniform3fv glad_glUniform3fv
+typedef void (APIENTRYP PFNGLUNIFORM4FVPROC)(GLint location, GLsizei count, const GLfloat *value);
+GLAPI PFNGLUNIFORM4FVPROC glad_glUniform4fv;
+#define glUniform4fv glad_glUniform4fv
+typedef void (APIENTRYP PFNGLUNIFORM1IVPROC)(GLint location, GLsizei count, const GLint *value);
+GLAPI PFNGLUNIFORM1IVPROC glad_glUniform1iv;
+#define glUniform1iv glad_glUniform1iv
+typedef void (APIENTRYP PFNGLUNIFORM2IVPROC)(GLint location, GLsizei count, const GLint *value);
+GLAPI PFNGLUNIFORM2IVPROC glad_glUniform2iv;
+#define glUniform2iv glad_glUniform2iv
+typedef void (APIENTRYP PFNGLUNIFORM3IVPROC)(GLint location, GLsizei count, const GLint *value);
+GLAPI PFNGLUNIFORM3IVPROC glad_glUniform3iv;
+#define glUniform3iv glad_glUniform3iv
+typedef void (APIENTRYP PFNGLUNIFORM4IVPROC)(GLint location, GLsizei count, const GLint *value);
+GLAPI PFNGLUNIFORM4IVPROC glad_glUniform4iv;
+#define glUniform4iv glad_glUniform4iv
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX2FVPROC)(GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI PFNGLUNIFORMMATRIX2FVPROC glad_glUniformMatrix2fv;
+#define glUniformMatrix2fv glad_glUniformMatrix2fv
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX3FVPROC)(GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI PFNGLUNIFORMMATRIX3FVPROC glad_glUniformMatrix3fv;
+#define glUniformMatrix3fv glad_glUniformMatrix3fv
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX4FVPROC)(GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI PFNGLUNIFORMMATRIX4FVPROC glad_glUniformMatrix4fv;
+#define glUniformMatrix4fv glad_glUniformMatrix4fv
+typedef void (APIENTRYP PFNGLVALIDATEPROGRAMPROC)(GLuint program);
+GLAPI PFNGLVALIDATEPROGRAMPROC glad_glValidateProgram;
+#define glValidateProgram glad_glValidateProgram
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1DPROC)(GLuint index, GLdouble x);
+GLAPI PFNGLVERTEXATTRIB1DPROC glad_glVertexAttrib1d;
+#define glVertexAttrib1d glad_glVertexAttrib1d
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1DVPROC)(GLuint index, const GLdouble *v);
+GLAPI PFNGLVERTEXATTRIB1DVPROC glad_glVertexAttrib1dv;
+#define glVertexAttrib1dv glad_glVertexAttrib1dv
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1FPROC)(GLuint index, GLfloat x);
+GLAPI PFNGLVERTEXATTRIB1FPROC glad_glVertexAttrib1f;
+#define glVertexAttrib1f glad_glVertexAttrib1f
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1FVPROC)(GLuint index, const GLfloat *v);
+GLAPI PFNGLVERTEXATTRIB1FVPROC glad_glVertexAttrib1fv;
+#define glVertexAttrib1fv glad_glVertexAttrib1fv
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1SPROC)(GLuint index, GLshort x);
+GLAPI PFNGLVERTEXATTRIB1SPROC glad_glVertexAttrib1s;
+#define glVertexAttrib1s glad_glVertexAttrib1s
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1SVPROC)(GLuint index, const GLshort *v);
+GLAPI PFNGLVERTEXATTRIB1SVPROC glad_glVertexAttrib1sv;
+#define glVertexAttrib1sv glad_glVertexAttrib1sv
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2DPROC)(GLuint index, GLdouble x, GLdouble y);
+GLAPI PFNGLVERTEXATTRIB2DPROC glad_glVertexAttrib2d;
+#define glVertexAttrib2d glad_glVertexAttrib2d
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2DVPROC)(GLuint index, const GLdouble *v);
+GLAPI PFNGLVERTEXATTRIB2DVPROC glad_glVertexAttrib2dv;
+#define glVertexAttrib2dv glad_glVertexAttrib2dv
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2FPROC)(GLuint index, GLfloat x, GLfloat y);
+GLAPI PFNGLVERTEXATTRIB2FPROC glad_glVertexAttrib2f;
+#define glVertexAttrib2f glad_glVertexAttrib2f
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2FVPROC)(GLuint index, const GLfloat *v);
+GLAPI PFNGLVERTEXATTRIB2FVPROC glad_glVertexAttrib2fv;
+#define glVertexAttrib2fv glad_glVertexAttrib2fv
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2SPROC)(GLuint index, GLshort x, GLshort y);
+GLAPI PFNGLVERTEXATTRIB2SPROC glad_glVertexAttrib2s;
+#define glVertexAttrib2s glad_glVertexAttrib2s
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2SVPROC)(GLuint index, const GLshort *v);
+GLAPI PFNGLVERTEXATTRIB2SVPROC glad_glVertexAttrib2sv;
+#define glVertexAttrib2sv glad_glVertexAttrib2sv
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3DPROC)(GLuint index, GLdouble x, GLdouble y, GLdouble z);
+GLAPI PFNGLVERTEXATTRIB3DPROC glad_glVertexAttrib3d;
+#define glVertexAttrib3d glad_glVertexAttrib3d
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3DVPROC)(GLuint index, const GLdouble *v);
+GLAPI PFNGLVERTEXATTRIB3DVPROC glad_glVertexAttrib3dv;
+#define glVertexAttrib3dv glad_glVertexAttrib3dv
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3FPROC)(GLuint index, GLfloat x, GLfloat y, GLfloat z);
+GLAPI PFNGLVERTEXATTRIB3FPROC glad_glVertexAttrib3f;
+#define glVertexAttrib3f glad_glVertexAttrib3f
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3FVPROC)(GLuint index, const GLfloat *v);
+GLAPI PFNGLVERTEXATTRIB3FVPROC glad_glVertexAttrib3fv;
+#define glVertexAttrib3fv glad_glVertexAttrib3fv
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3SPROC)(GLuint index, GLshort x, GLshort y, GLshort z);
+GLAPI PFNGLVERTEXATTRIB3SPROC glad_glVertexAttrib3s;
+#define glVertexAttrib3s glad_glVertexAttrib3s
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3SVPROC)(GLuint index, const GLshort *v);
+GLAPI PFNGLVERTEXATTRIB3SVPROC glad_glVertexAttrib3sv;
+#define glVertexAttrib3sv glad_glVertexAttrib3sv
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4NBVPROC)(GLuint index, const GLbyte *v);
+GLAPI PFNGLVERTEXATTRIB4NBVPROC glad_glVertexAttrib4Nbv;
+#define glVertexAttrib4Nbv glad_glVertexAttrib4Nbv
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4NIVPROC)(GLuint index, const GLint *v);
+GLAPI PFNGLVERTEXATTRIB4NIVPROC glad_glVertexAttrib4Niv;
+#define glVertexAttrib4Niv glad_glVertexAttrib4Niv
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4NSVPROC)(GLuint index, const GLshort *v);
+GLAPI PFNGLVERTEXATTRIB4NSVPROC glad_glVertexAttrib4Nsv;
+#define glVertexAttrib4Nsv glad_glVertexAttrib4Nsv
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4NUBPROC)(GLuint index, GLubyte x, GLubyte y, GLubyte z, GLubyte w);
+GLAPI PFNGLVERTEXATTRIB4NUBPROC glad_glVertexAttrib4Nub;
+#define glVertexAttrib4Nub glad_glVertexAttrib4Nub
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4NUBVPROC)(GLuint index, const GLubyte *v);
+GLAPI PFNGLVERTEXATTRIB4NUBVPROC glad_glVertexAttrib4Nubv;
+#define glVertexAttrib4Nubv glad_glVertexAttrib4Nubv
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4NUIVPROC)(GLuint index, const GLuint *v);
+GLAPI PFNGLVERTEXATTRIB4NUIVPROC glad_glVertexAttrib4Nuiv;
+#define glVertexAttrib4Nuiv glad_glVertexAttrib4Nuiv
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4NUSVPROC)(GLuint index, const GLushort *v);
+GLAPI PFNGLVERTEXATTRIB4NUSVPROC glad_glVertexAttrib4Nusv;
+#define glVertexAttrib4Nusv glad_glVertexAttrib4Nusv
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4BVPROC)(GLuint index, const GLbyte *v);
+GLAPI PFNGLVERTEXATTRIB4BVPROC glad_glVertexAttrib4bv;
+#define glVertexAttrib4bv glad_glVertexAttrib4bv
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4DPROC)(GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+GLAPI PFNGLVERTEXATTRIB4DPROC glad_glVertexAttrib4d;
+#define glVertexAttrib4d glad_glVertexAttrib4d
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4DVPROC)(GLuint index, const GLdouble *v);
+GLAPI PFNGLVERTEXATTRIB4DVPROC glad_glVertexAttrib4dv;
+#define glVertexAttrib4dv glad_glVertexAttrib4dv
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4FPROC)(GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+GLAPI PFNGLVERTEXATTRIB4FPROC glad_glVertexAttrib4f;
+#define glVertexAttrib4f glad_glVertexAttrib4f
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4FVPROC)(GLuint index, const GLfloat *v);
+GLAPI PFNGLVERTEXATTRIB4FVPROC glad_glVertexAttrib4fv;
+#define glVertexAttrib4fv glad_glVertexAttrib4fv
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4IVPROC)(GLuint index, const GLint *v);
+GLAPI PFNGLVERTEXATTRIB4IVPROC glad_glVertexAttrib4iv;
+#define glVertexAttrib4iv glad_glVertexAttrib4iv
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4SPROC)(GLuint index, GLshort x, GLshort y, GLshort z, GLshort w);
+GLAPI PFNGLVERTEXATTRIB4SPROC glad_glVertexAttrib4s;
+#define glVertexAttrib4s glad_glVertexAttrib4s
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4SVPROC)(GLuint index, const GLshort *v);
+GLAPI PFNGLVERTEXATTRIB4SVPROC glad_glVertexAttrib4sv;
+#define glVertexAttrib4sv glad_glVertexAttrib4sv
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4UBVPROC)(GLuint index, const GLubyte *v);
+GLAPI PFNGLVERTEXATTRIB4UBVPROC glad_glVertexAttrib4ubv;
+#define glVertexAttrib4ubv glad_glVertexAttrib4ubv
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4UIVPROC)(GLuint index, const GLuint *v);
+GLAPI PFNGLVERTEXATTRIB4UIVPROC glad_glVertexAttrib4uiv;
+#define glVertexAttrib4uiv glad_glVertexAttrib4uiv
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4USVPROC)(GLuint index, const GLushort *v);
+GLAPI PFNGLVERTEXATTRIB4USVPROC glad_glVertexAttrib4usv;
+#define glVertexAttrib4usv glad_glVertexAttrib4usv
+typedef void (APIENTRYP PFNGLVERTEXATTRIBPOINTERPROC)(GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const void *pointer);
+GLAPI PFNGLVERTEXATTRIBPOINTERPROC glad_glVertexAttribPointer;
+#define glVertexAttribPointer glad_glVertexAttribPointer
+#endif
+#ifndef GL_VERSION_2_1
+#define GL_VERSION_2_1 1
+GLAPI int GLAD_GL_VERSION_2_1;
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX2X3FVPROC)(GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI PFNGLUNIFORMMATRIX2X3FVPROC glad_glUniformMatrix2x3fv;
+#define glUniformMatrix2x3fv glad_glUniformMatrix2x3fv
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX3X2FVPROC)(GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI PFNGLUNIFORMMATRIX3X2FVPROC glad_glUniformMatrix3x2fv;
+#define glUniformMatrix3x2fv glad_glUniformMatrix3x2fv
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX2X4FVPROC)(GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI PFNGLUNIFORMMATRIX2X4FVPROC glad_glUniformMatrix2x4fv;
+#define glUniformMatrix2x4fv glad_glUniformMatrix2x4fv
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX4X2FVPROC)(GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI PFNGLUNIFORMMATRIX4X2FVPROC glad_glUniformMatrix4x2fv;
+#define glUniformMatrix4x2fv glad_glUniformMatrix4x2fv
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX3X4FVPROC)(GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI PFNGLUNIFORMMATRIX3X4FVPROC glad_glUniformMatrix3x4fv;
+#define glUniformMatrix3x4fv glad_glUniformMatrix3x4fv
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX4X3FVPROC)(GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI PFNGLUNIFORMMATRIX4X3FVPROC glad_glUniformMatrix4x3fv;
+#define glUniformMatrix4x3fv glad_glUniformMatrix4x3fv
+#endif
+#ifndef GL_VERSION_3_0
+#define GL_VERSION_3_0 1
+GLAPI int GLAD_GL_VERSION_3_0;
+typedef void (APIENTRYP PFNGLCOLORMASKIPROC)(GLuint index, GLboolean r, GLboolean g, GLboolean b, GLboolean a);
+GLAPI PFNGLCOLORMASKIPROC glad_glColorMaski;
+#define glColorMaski glad_glColorMaski
+typedef void (APIENTRYP PFNGLGETBOOLEANI_VPROC)(GLenum target, GLuint index, GLboolean *data);
+GLAPI PFNGLGETBOOLEANI_VPROC glad_glGetBooleani_v;
+#define glGetBooleani_v glad_glGetBooleani_v
+typedef void (APIENTRYP PFNGLGETINTEGERI_VPROC)(GLenum target, GLuint index, GLint *data);
+GLAPI PFNGLGETINTEGERI_VPROC glad_glGetIntegeri_v;
+#define glGetIntegeri_v glad_glGetIntegeri_v
+typedef void (APIENTRYP PFNGLENABLEIPROC)(GLenum target, GLuint index);
+GLAPI PFNGLENABLEIPROC glad_glEnablei;
+#define glEnablei glad_glEnablei
+typedef void (APIENTRYP PFNGLDISABLEIPROC)(GLenum target, GLuint index);
+GLAPI PFNGLDISABLEIPROC glad_glDisablei;
+#define glDisablei glad_glDisablei
+typedef GLboolean (APIENTRYP PFNGLISENABLEDIPROC)(GLenum target, GLuint index);
+GLAPI PFNGLISENABLEDIPROC glad_glIsEnabledi;
+#define glIsEnabledi glad_glIsEnabledi
+typedef void (APIENTRYP PFNGLBEGINTRANSFORMFEEDBACKPROC)(GLenum primitiveMode);
+GLAPI PFNGLBEGINTRANSFORMFEEDBACKPROC glad_glBeginTransformFeedback;
+#define glBeginTransformFeedback glad_glBeginTransformFeedback
+typedef void (APIENTRYP PFNGLENDTRANSFORMFEEDBACKPROC)(void);
+GLAPI PFNGLENDTRANSFORMFEEDBACKPROC glad_glEndTransformFeedback;
+#define glEndTransformFeedback glad_glEndTransformFeedback
+typedef void (APIENTRYP PFNGLBINDBUFFERRANGEPROC)(GLenum target, GLuint index, GLuint buffer, GLintptr offset, GLsizeiptr size);
+GLAPI PFNGLBINDBUFFERRANGEPROC glad_glBindBufferRange;
+#define glBindBufferRange glad_glBindBufferRange
+typedef void (APIENTRYP PFNGLBINDBUFFERBASEPROC)(GLenum target, GLuint index, GLuint buffer);
+GLAPI PFNGLBINDBUFFERBASEPROC glad_glBindBufferBase;
+#define glBindBufferBase glad_glBindBufferBase
+typedef void (APIENTRYP PFNGLTRANSFORMFEEDBACKVARYINGSPROC)(GLuint program, GLsizei count, const GLchar *const*varyings, GLenum bufferMode);
+GLAPI PFNGLTRANSFORMFEEDBACKVARYINGSPROC glad_glTransformFeedbackVaryings;
+#define glTransformFeedbackVaryings glad_glTransformFeedbackVaryings
+typedef void (APIENTRYP PFNGLGETTRANSFORMFEEDBACKVARYINGPROC)(GLuint program, GLuint index, GLsizei bufSize, GLsizei *length, GLsizei *size, GLenum *type, GLchar *name);
+GLAPI PFNGLGETTRANSFORMFEEDBACKVARYINGPROC glad_glGetTransformFeedbackVarying;
+#define glGetTransformFeedbackVarying glad_glGetTransformFeedbackVarying
+typedef void (APIENTRYP PFNGLCLAMPCOLORPROC)(GLenum target, GLenum clamp);
+GLAPI PFNGLCLAMPCOLORPROC glad_glClampColor;
+#define glClampColor glad_glClampColor
+typedef void (APIENTRYP PFNGLBEGINCONDITIONALRENDERPROC)(GLuint id, GLenum mode);
+GLAPI PFNGLBEGINCONDITIONALRENDERPROC glad_glBeginConditionalRender;
+#define glBeginConditionalRender glad_glBeginConditionalRender
+typedef void (APIENTRYP PFNGLENDCONDITIONALRENDERPROC)(void);
+GLAPI PFNGLENDCONDITIONALRENDERPROC glad_glEndConditionalRender;
+#define glEndConditionalRender glad_glEndConditionalRender
+typedef void (APIENTRYP PFNGLVERTEXATTRIBIPOINTERPROC)(GLuint index, GLint size, GLenum type, GLsizei stride, const void *pointer);
+GLAPI PFNGLVERTEXATTRIBIPOINTERPROC glad_glVertexAttribIPointer;
+#define glVertexAttribIPointer glad_glVertexAttribIPointer
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBIIVPROC)(GLuint index, GLenum pname, GLint *params);
+GLAPI PFNGLGETVERTEXATTRIBIIVPROC glad_glGetVertexAttribIiv;
+#define glGetVertexAttribIiv glad_glGetVertexAttribIiv
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBIUIVPROC)(GLuint index, GLenum pname, GLuint *params);
+GLAPI PFNGLGETVERTEXATTRIBIUIVPROC glad_glGetVertexAttribIuiv;
+#define glGetVertexAttribIuiv glad_glGetVertexAttribIuiv
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI1IPROC)(GLuint index, GLint x);
+GLAPI PFNGLVERTEXATTRIBI1IPROC glad_glVertexAttribI1i;
+#define glVertexAttribI1i glad_glVertexAttribI1i
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI2IPROC)(GLuint index, GLint x, GLint y);
+GLAPI PFNGLVERTEXATTRIBI2IPROC glad_glVertexAttribI2i;
+#define glVertexAttribI2i glad_glVertexAttribI2i
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI3IPROC)(GLuint index, GLint x, GLint y, GLint z);
+GLAPI PFNGLVERTEXATTRIBI3IPROC glad_glVertexAttribI3i;
+#define glVertexAttribI3i glad_glVertexAttribI3i
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI4IPROC)(GLuint index, GLint x, GLint y, GLint z, GLint w);
+GLAPI PFNGLVERTEXATTRIBI4IPROC glad_glVertexAttribI4i;
+#define glVertexAttribI4i glad_glVertexAttribI4i
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI1UIPROC)(GLuint index, GLuint x);
+GLAPI PFNGLVERTEXATTRIBI1UIPROC glad_glVertexAttribI1ui;
+#define glVertexAttribI1ui glad_glVertexAttribI1ui
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI2UIPROC)(GLuint index, GLuint x, GLuint y);
+GLAPI PFNGLVERTEXATTRIBI2UIPROC glad_glVertexAttribI2ui;
+#define glVertexAttribI2ui glad_glVertexAttribI2ui
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI3UIPROC)(GLuint index, GLuint x, GLuint y, GLuint z);
+GLAPI PFNGLVERTEXATTRIBI3UIPROC glad_glVertexAttribI3ui;
+#define glVertexAttribI3ui glad_glVertexAttribI3ui
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI4UIPROC)(GLuint index, GLuint x, GLuint y, GLuint z, GLuint w);
+GLAPI PFNGLVERTEXATTRIBI4UIPROC glad_glVertexAttribI4ui;
+#define glVertexAttribI4ui glad_glVertexAttribI4ui
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI1IVPROC)(GLuint index, const GLint *v);
+GLAPI PFNGLVERTEXATTRIBI1IVPROC glad_glVertexAttribI1iv;
+#define glVertexAttribI1iv glad_glVertexAttribI1iv
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI2IVPROC)(GLuint index, const GLint *v);
+GLAPI PFNGLVERTEXATTRIBI2IVPROC glad_glVertexAttribI2iv;
+#define glVertexAttribI2iv glad_glVertexAttribI2iv
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI3IVPROC)(GLuint index, const GLint *v);
+GLAPI PFNGLVERTEXATTRIBI3IVPROC glad_glVertexAttribI3iv;
+#define glVertexAttribI3iv glad_glVertexAttribI3iv
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI4IVPROC)(GLuint index, const GLint *v);
+GLAPI PFNGLVERTEXATTRIBI4IVPROC glad_glVertexAttribI4iv;
+#define glVertexAttribI4iv glad_glVertexAttribI4iv
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI1UIVPROC)(GLuint index, const GLuint *v);
+GLAPI PFNGLVERTEXATTRIBI1UIVPROC glad_glVertexAttribI1uiv;
+#define glVertexAttribI1uiv glad_glVertexAttribI1uiv
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI2UIVPROC)(GLuint index, const GLuint *v);
+GLAPI PFNGLVERTEXATTRIBI2UIVPROC glad_glVertexAttribI2uiv;
+#define glVertexAttribI2uiv glad_glVertexAttribI2uiv
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI3UIVPROC)(GLuint index, const GLuint *v);
+GLAPI PFNGLVERTEXATTRIBI3UIVPROC glad_glVertexAttribI3uiv;
+#define glVertexAttribI3uiv glad_glVertexAttribI3uiv
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI4UIVPROC)(GLuint index, const GLuint *v);
+GLAPI PFNGLVERTEXATTRIBI4UIVPROC glad_glVertexAttribI4uiv;
+#define glVertexAttribI4uiv glad_glVertexAttribI4uiv
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI4BVPROC)(GLuint index, const GLbyte *v);
+GLAPI PFNGLVERTEXATTRIBI4BVPROC glad_glVertexAttribI4bv;
+#define glVertexAttribI4bv glad_glVertexAttribI4bv
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI4SVPROC)(GLuint index, const GLshort *v);
+GLAPI PFNGLVERTEXATTRIBI4SVPROC glad_glVertexAttribI4sv;
+#define glVertexAttribI4sv glad_glVertexAttribI4sv
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI4UBVPROC)(GLuint index, const GLubyte *v);
+GLAPI PFNGLVERTEXATTRIBI4UBVPROC glad_glVertexAttribI4ubv;
+#define glVertexAttribI4ubv glad_glVertexAttribI4ubv
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI4USVPROC)(GLuint index, const GLushort *v);
+GLAPI PFNGLVERTEXATTRIBI4USVPROC glad_glVertexAttribI4usv;
+#define glVertexAttribI4usv glad_glVertexAttribI4usv
+typedef void (APIENTRYP PFNGLGETUNIFORMUIVPROC)(GLuint program, GLint location, GLuint *params);
+GLAPI PFNGLGETUNIFORMUIVPROC glad_glGetUniformuiv;
+#define glGetUniformuiv glad_glGetUniformuiv
+typedef void (APIENTRYP PFNGLBINDFRAGDATALOCATIONPROC)(GLuint program, GLuint color, const GLchar *name);
+GLAPI PFNGLBINDFRAGDATALOCATIONPROC glad_glBindFragDataLocation;
+#define glBindFragDataLocation glad_glBindFragDataLocation
+typedef GLint (APIENTRYP PFNGLGETFRAGDATALOCATIONPROC)(GLuint program, const GLchar *name);
+GLAPI PFNGLGETFRAGDATALOCATIONPROC glad_glGetFragDataLocation;
+#define glGetFragDataLocation glad_glGetFragDataLocation
+typedef void (APIENTRYP PFNGLUNIFORM1UIPROC)(GLint location, GLuint v0);
+GLAPI PFNGLUNIFORM1UIPROC glad_glUniform1ui;
+#define glUniform1ui glad_glUniform1ui
+typedef void (APIENTRYP PFNGLUNIFORM2UIPROC)(GLint location, GLuint v0, GLuint v1);
+GLAPI PFNGLUNIFORM2UIPROC glad_glUniform2ui;
+#define glUniform2ui glad_glUniform2ui
+typedef void (APIENTRYP PFNGLUNIFORM3UIPROC)(GLint location, GLuint v0, GLuint v1, GLuint v2);
+GLAPI PFNGLUNIFORM3UIPROC glad_glUniform3ui;
+#define glUniform3ui glad_glUniform3ui
+typedef void (APIENTRYP PFNGLUNIFORM4UIPROC)(GLint location, GLuint v0, GLuint v1, GLuint v2, GLuint v3);
+GLAPI PFNGLUNIFORM4UIPROC glad_glUniform4ui;
+#define glUniform4ui glad_glUniform4ui
+typedef void (APIENTRYP PFNGLUNIFORM1UIVPROC)(GLint location, GLsizei count, const GLuint *value);
+GLAPI PFNGLUNIFORM1UIVPROC glad_glUniform1uiv;
+#define glUniform1uiv glad_glUniform1uiv
+typedef void (APIENTRYP PFNGLUNIFORM2UIVPROC)(GLint location, GLsizei count, const GLuint *value);
+GLAPI PFNGLUNIFORM2UIVPROC glad_glUniform2uiv;
+#define glUniform2uiv glad_glUniform2uiv
+typedef void (APIENTRYP PFNGLUNIFORM3UIVPROC)(GLint location, GLsizei count, const GLuint *value);
+GLAPI PFNGLUNIFORM3UIVPROC glad_glUniform3uiv;
+#define glUniform3uiv glad_glUniform3uiv
+typedef void (APIENTRYP PFNGLUNIFORM4UIVPROC)(GLint location, GLsizei count, const GLuint *value);
+GLAPI PFNGLUNIFORM4UIVPROC glad_glUniform4uiv;
+#define glUniform4uiv glad_glUniform4uiv
+typedef void (APIENTRYP PFNGLTEXPARAMETERIIVPROC)(GLenum target, GLenum pname, const GLint *params);
+GLAPI PFNGLTEXPARAMETERIIVPROC glad_glTexParameterIiv;
+#define glTexParameterIiv glad_glTexParameterIiv
+typedef void (APIENTRYP PFNGLTEXPARAMETERIUIVPROC)(GLenum target, GLenum pname, const GLuint *params);
+GLAPI PFNGLTEXPARAMETERIUIVPROC glad_glTexParameterIuiv;
+#define glTexParameterIuiv glad_glTexParameterIuiv
+typedef void (APIENTRYP PFNGLGETTEXPARAMETERIIVPROC)(GLenum target, GLenum pname, GLint *params);
+GLAPI PFNGLGETTEXPARAMETERIIVPROC glad_glGetTexParameterIiv;
+#define glGetTexParameterIiv glad_glGetTexParameterIiv
+typedef void (APIENTRYP PFNGLGETTEXPARAMETERIUIVPROC)(GLenum target, GLenum pname, GLuint *params);
+GLAPI PFNGLGETTEXPARAMETERIUIVPROC glad_glGetTexParameterIuiv;
+#define glGetTexParameterIuiv glad_glGetTexParameterIuiv
+typedef void (APIENTRYP PFNGLCLEARBUFFERIVPROC)(GLenum buffer, GLint drawbuffer, const GLint *value);
+GLAPI PFNGLCLEARBUFFERIVPROC glad_glClearBufferiv;
+#define glClearBufferiv glad_glClearBufferiv
+typedef void (APIENTRYP PFNGLCLEARBUFFERUIVPROC)(GLenum buffer, GLint drawbuffer, const GLuint *value);
+GLAPI PFNGLCLEARBUFFERUIVPROC glad_glClearBufferuiv;
+#define glClearBufferuiv glad_glClearBufferuiv
+typedef void (APIENTRYP PFNGLCLEARBUFFERFVPROC)(GLenum buffer, GLint drawbuffer, const GLfloat *value);
+GLAPI PFNGLCLEARBUFFERFVPROC glad_glClearBufferfv;
+#define glClearBufferfv glad_glClearBufferfv
+typedef void (APIENTRYP PFNGLCLEARBUFFERFIPROC)(GLenum buffer, GLint drawbuffer, GLfloat depth, GLint stencil);
+GLAPI PFNGLCLEARBUFFERFIPROC glad_glClearBufferfi;
+#define glClearBufferfi glad_glClearBufferfi
+typedef const GLubyte * (APIENTRYP PFNGLGETSTRINGIPROC)(GLenum name, GLuint index);
+GLAPI PFNGLGETSTRINGIPROC glad_glGetStringi;
+#define glGetStringi glad_glGetStringi
+typedef GLboolean (APIENTRYP PFNGLISRENDERBUFFERPROC)(GLuint renderbuffer);
+GLAPI PFNGLISRENDERBUFFERPROC glad_glIsRenderbuffer;
+#define glIsRenderbuffer glad_glIsRenderbuffer
+typedef void (APIENTRYP PFNGLBINDRENDERBUFFERPROC)(GLenum target, GLuint renderbuffer);
+GLAPI PFNGLBINDRENDERBUFFERPROC glad_glBindRenderbuffer;
+#define glBindRenderbuffer glad_glBindRenderbuffer
+typedef void (APIENTRYP PFNGLDELETERENDERBUFFERSPROC)(GLsizei n, const GLuint *renderbuffers);
+GLAPI PFNGLDELETERENDERBUFFERSPROC glad_glDeleteRenderbuffers;
+#define glDeleteRenderbuffers glad_glDeleteRenderbuffers
+typedef void (APIENTRYP PFNGLGENRENDERBUFFERSPROC)(GLsizei n, GLuint *renderbuffers);
+GLAPI PFNGLGENRENDERBUFFERSPROC glad_glGenRenderbuffers;
+#define glGenRenderbuffers glad_glGenRenderbuffers
+typedef void (APIENTRYP PFNGLRENDERBUFFERSTORAGEPROC)(GLenum target, GLenum internalformat, GLsizei width, GLsizei height);
+GLAPI PFNGLRENDERBUFFERSTORAGEPROC glad_glRenderbufferStorage;
+#define glRenderbufferStorage glad_glRenderbufferStorage
+typedef void (APIENTRYP PFNGLGETRENDERBUFFERPARAMETERIVPROC)(GLenum target, GLenum pname, GLint *params);
+GLAPI PFNGLGETRENDERBUFFERPARAMETERIVPROC glad_glGetRenderbufferParameteriv;
+#define glGetRenderbufferParameteriv glad_glGetRenderbufferParameteriv
+typedef GLboolean (APIENTRYP PFNGLISFRAMEBUFFERPROC)(GLuint framebuffer);
+GLAPI PFNGLISFRAMEBUFFERPROC glad_glIsFramebuffer;
+#define glIsFramebuffer glad_glIsFramebuffer
+typedef void (APIENTRYP PFNGLBINDFRAMEBUFFERPROC)(GLenum target, GLuint framebuffer);
+GLAPI PFNGLBINDFRAMEBUFFERPROC glad_glBindFramebuffer;
+#define glBindFramebuffer glad_glBindFramebuffer
+typedef void (APIENTRYP PFNGLDELETEFRAMEBUFFERSPROC)(GLsizei n, const GLuint *framebuffers);
+GLAPI PFNGLDELETEFRAMEBUFFERSPROC glad_glDeleteFramebuffers;
+#define glDeleteFramebuffers glad_glDeleteFramebuffers
+typedef void (APIENTRYP PFNGLGENFRAMEBUFFERSPROC)(GLsizei n, GLuint *framebuffers);
+GLAPI PFNGLGENFRAMEBUFFERSPROC glad_glGenFramebuffers;
+#define glGenFramebuffers glad_glGenFramebuffers
+typedef GLenum (APIENTRYP PFNGLCHECKFRAMEBUFFERSTATUSPROC)(GLenum target);
+GLAPI PFNGLCHECKFRAMEBUFFERSTATUSPROC glad_glCheckFramebufferStatus;
+#define glCheckFramebufferStatus glad_glCheckFramebufferStatus
+typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTURE1DPROC)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
+GLAPI PFNGLFRAMEBUFFERTEXTURE1DPROC glad_glFramebufferTexture1D;
+#define glFramebufferTexture1D glad_glFramebufferTexture1D
+typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTURE2DPROC)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
+GLAPI PFNGLFRAMEBUFFERTEXTURE2DPROC glad_glFramebufferTexture2D;
+#define glFramebufferTexture2D glad_glFramebufferTexture2D
+typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTURE3DPROC)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level, GLint zoffset);
+GLAPI PFNGLFRAMEBUFFERTEXTURE3DPROC glad_glFramebufferTexture3D;
+#define glFramebufferTexture3D glad_glFramebufferTexture3D
+typedef void (APIENTRYP PFNGLFRAMEBUFFERRENDERBUFFERPROC)(GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
+GLAPI PFNGLFRAMEBUFFERRENDERBUFFERPROC glad_glFramebufferRenderbuffer;
+#define glFramebufferRenderbuffer glad_glFramebufferRenderbuffer
+typedef void (APIENTRYP PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC)(GLenum target, GLenum attachment, GLenum pname, GLint *params);
+GLAPI PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC glad_glGetFramebufferAttachmentParameteriv;
+#define glGetFramebufferAttachmentParameteriv glad_glGetFramebufferAttachmentParameteriv
+typedef void (APIENTRYP PFNGLGENERATEMIPMAPPROC)(GLenum target);
+GLAPI PFNGLGENERATEMIPMAPPROC glad_glGenerateMipmap;
+#define glGenerateMipmap glad_glGenerateMipmap
+typedef void (APIENTRYP PFNGLBLITFRAMEBUFFERPROC)(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter);
+GLAPI PFNGLBLITFRAMEBUFFERPROC glad_glBlitFramebuffer;
+#define glBlitFramebuffer glad_glBlitFramebuffer
+typedef void (APIENTRYP PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC)(GLenum target, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height);
+GLAPI PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC glad_glRenderbufferStorageMultisample;
+#define glRenderbufferStorageMultisample glad_glRenderbufferStorageMultisample
+typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTURELAYERPROC)(GLenum target, GLenum attachment, GLuint texture, GLint level, GLint layer);
+GLAPI PFNGLFRAMEBUFFERTEXTURELAYERPROC glad_glFramebufferTextureLayer;
+#define glFramebufferTextureLayer glad_glFramebufferTextureLayer
+typedef void * (APIENTRYP PFNGLMAPBUFFERRANGEPROC)(GLenum target, GLintptr offset, GLsizeiptr length, GLbitfield access);
+GLAPI PFNGLMAPBUFFERRANGEPROC glad_glMapBufferRange;
+#define glMapBufferRange glad_glMapBufferRange
+typedef void (APIENTRYP PFNGLFLUSHMAPPEDBUFFERRANGEPROC)(GLenum target, GLintptr offset, GLsizeiptr length);
+GLAPI PFNGLFLUSHMAPPEDBUFFERRANGEPROC glad_glFlushMappedBufferRange;
+#define glFlushMappedBufferRange glad_glFlushMappedBufferRange
+typedef void (APIENTRYP PFNGLBINDVERTEXARRAYPROC)(GLuint array);
+GLAPI PFNGLBINDVERTEXARRAYPROC glad_glBindVertexArray;
+#define glBindVertexArray glad_glBindVertexArray
+typedef void (APIENTRYP PFNGLDELETEVERTEXARRAYSPROC)(GLsizei n, const GLuint *arrays);
+GLAPI PFNGLDELETEVERTEXARRAYSPROC glad_glDeleteVertexArrays;
+#define glDeleteVertexArrays glad_glDeleteVertexArrays
+typedef void (APIENTRYP PFNGLGENVERTEXARRAYSPROC)(GLsizei n, GLuint *arrays);
+GLAPI PFNGLGENVERTEXARRAYSPROC glad_glGenVertexArrays;
+#define glGenVertexArrays glad_glGenVertexArrays
+typedef GLboolean (APIENTRYP PFNGLISVERTEXARRAYPROC)(GLuint array);
+GLAPI PFNGLISVERTEXARRAYPROC glad_glIsVertexArray;
+#define glIsVertexArray glad_glIsVertexArray
+#endif
+#ifndef GL_VERSION_3_1
+#define GL_VERSION_3_1 1
+GLAPI int GLAD_GL_VERSION_3_1;
+typedef void (APIENTRYP PFNGLDRAWARRAYSINSTANCEDPROC)(GLenum mode, GLint first, GLsizei count, GLsizei instancecount);
+GLAPI PFNGLDRAWARRAYSINSTANCEDPROC glad_glDrawArraysInstanced;
+#define glDrawArraysInstanced glad_glDrawArraysInstanced
+typedef void (APIENTRYP PFNGLDRAWELEMENTSINSTANCEDPROC)(GLenum mode, GLsizei count, GLenum type, const void *indices, GLsizei instancecount);
+GLAPI PFNGLDRAWELEMENTSINSTANCEDPROC glad_glDrawElementsInstanced;
+#define glDrawElementsInstanced glad_glDrawElementsInstanced
+typedef void (APIENTRYP PFNGLTEXBUFFERPROC)(GLenum target, GLenum internalformat, GLuint buffer);
+GLAPI PFNGLTEXBUFFERPROC glad_glTexBuffer;
+#define glTexBuffer glad_glTexBuffer
+typedef void (APIENTRYP PFNGLPRIMITIVERESTARTINDEXPROC)(GLuint index);
+GLAPI PFNGLPRIMITIVERESTARTINDEXPROC glad_glPrimitiveRestartIndex;
+#define glPrimitiveRestartIndex glad_glPrimitiveRestartIndex
+typedef void (APIENTRYP PFNGLCOPYBUFFERSUBDATAPROC)(GLenum readTarget, GLenum writeTarget, GLintptr readOffset, GLintptr writeOffset, GLsizeiptr size);
+GLAPI PFNGLCOPYBUFFERSUBDATAPROC glad_glCopyBufferSubData;
+#define glCopyBufferSubData glad_glCopyBufferSubData
+typedef void (APIENTRYP PFNGLGETUNIFORMINDICESPROC)(GLuint program, GLsizei uniformCount, const GLchar *const*uniformNames, GLuint *uniformIndices);
+GLAPI PFNGLGETUNIFORMINDICESPROC glad_glGetUniformIndices;
+#define glGetUniformIndices glad_glGetUniformIndices
+typedef void (APIENTRYP PFNGLGETACTIVEUNIFORMSIVPROC)(GLuint program, GLsizei uniformCount, const GLuint *uniformIndices, GLenum pname, GLint *params);
+GLAPI PFNGLGETACTIVEUNIFORMSIVPROC glad_glGetActiveUniformsiv;
+#define glGetActiveUniformsiv glad_glGetActiveUniformsiv
+typedef void (APIENTRYP PFNGLGETACTIVEUNIFORMNAMEPROC)(GLuint program, GLuint uniformIndex, GLsizei bufSize, GLsizei *length, GLchar *uniformName);
+GLAPI PFNGLGETACTIVEUNIFORMNAMEPROC glad_glGetActiveUniformName;
+#define glGetActiveUniformName glad_glGetActiveUniformName
+typedef GLuint (APIENTRYP PFNGLGETUNIFORMBLOCKINDEXPROC)(GLuint program, const GLchar *uniformBlockName);
+GLAPI PFNGLGETUNIFORMBLOCKINDEXPROC glad_glGetUniformBlockIndex;
+#define glGetUniformBlockIndex glad_glGetUniformBlockIndex
+typedef void (APIENTRYP PFNGLGETACTIVEUNIFORMBLOCKIVPROC)(GLuint program, GLuint uniformBlockIndex, GLenum pname, GLint *params);
+GLAPI PFNGLGETACTIVEUNIFORMBLOCKIVPROC glad_glGetActiveUniformBlockiv;
+#define glGetActiveUniformBlockiv glad_glGetActiveUniformBlockiv
+typedef void (APIENTRYP PFNGLGETACTIVEUNIFORMBLOCKNAMEPROC)(GLuint program, GLuint uniformBlockIndex, GLsizei bufSize, GLsizei *length, GLchar *uniformBlockName);
+GLAPI PFNGLGETACTIVEUNIFORMBLOCKNAMEPROC glad_glGetActiveUniformBlockName;
+#define glGetActiveUniformBlockName glad_glGetActiveUniformBlockName
+typedef void (APIENTRYP PFNGLUNIFORMBLOCKBINDINGPROC)(GLuint program, GLuint uniformBlockIndex, GLuint uniformBlockBinding);
+GLAPI PFNGLUNIFORMBLOCKBINDINGPROC glad_glUniformBlockBinding;
+#define glUniformBlockBinding glad_glUniformBlockBinding
+#endif
+#ifndef GL_VERSION_3_2
+#define GL_VERSION_3_2 1
+GLAPI int GLAD_GL_VERSION_3_2;
+typedef void (APIENTRYP PFNGLDRAWELEMENTSBASEVERTEXPROC)(GLenum mode, GLsizei count, GLenum type, const void *indices, GLint basevertex);
+GLAPI PFNGLDRAWELEMENTSBASEVERTEXPROC glad_glDrawElementsBaseVertex;
+#define glDrawElementsBaseVertex glad_glDrawElementsBaseVertex
+typedef void (APIENTRYP PFNGLDRAWRANGEELEMENTSBASEVERTEXPROC)(GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const void *indices, GLint basevertex);
+GLAPI PFNGLDRAWRANGEELEMENTSBASEVERTEXPROC glad_glDrawRangeElementsBaseVertex;
+#define glDrawRangeElementsBaseVertex glad_glDrawRangeElementsBaseVertex
+typedef void (APIENTRYP PFNGLDRAWELEMENTSINSTANCEDBASEVERTEXPROC)(GLenum mode, GLsizei count, GLenum type, const void *indices, GLsizei instancecount, GLint basevertex);
+GLAPI PFNGLDRAWELEMENTSINSTANCEDBASEVERTEXPROC glad_glDrawElementsInstancedBaseVertex;
+#define glDrawElementsInstancedBaseVertex glad_glDrawElementsInstancedBaseVertex
+typedef void (APIENTRYP PFNGLMULTIDRAWELEMENTSBASEVERTEXPROC)(GLenum mode, const GLsizei *count, GLenum type, const void *const*indices, GLsizei drawcount, const GLint *basevertex);
+GLAPI PFNGLMULTIDRAWELEMENTSBASEVERTEXPROC glad_glMultiDrawElementsBaseVertex;
+#define glMultiDrawElementsBaseVertex glad_glMultiDrawElementsBaseVertex
+typedef void (APIENTRYP PFNGLPROVOKINGVERTEXPROC)(GLenum mode);
+GLAPI PFNGLPROVOKINGVERTEXPROC glad_glProvokingVertex;
+#define glProvokingVertex glad_glProvokingVertex
+typedef GLsync (APIENTRYP PFNGLFENCESYNCPROC)(GLenum condition, GLbitfield flags);
+GLAPI PFNGLFENCESYNCPROC glad_glFenceSync;
+#define glFenceSync glad_glFenceSync
+typedef GLboolean (APIENTRYP PFNGLISSYNCPROC)(GLsync sync);
+GLAPI PFNGLISSYNCPROC glad_glIsSync;
+#define glIsSync glad_glIsSync
+typedef void (APIENTRYP PFNGLDELETESYNCPROC)(GLsync sync);
+GLAPI PFNGLDELETESYNCPROC glad_glDeleteSync;
+#define glDeleteSync glad_glDeleteSync
+typedef GLenum (APIENTRYP PFNGLCLIENTWAITSYNCPROC)(GLsync sync, GLbitfield flags, GLuint64 timeout);
+GLAPI PFNGLCLIENTWAITSYNCPROC glad_glClientWaitSync;
+#define glClientWaitSync glad_glClientWaitSync
+typedef void (APIENTRYP PFNGLWAITSYNCPROC)(GLsync sync, GLbitfield flags, GLuint64 timeout);
+GLAPI PFNGLWAITSYNCPROC glad_glWaitSync;
+#define glWaitSync glad_glWaitSync
+typedef void (APIENTRYP PFNGLGETINTEGER64VPROC)(GLenum pname, GLint64 *data);
+GLAPI PFNGLGETINTEGER64VPROC glad_glGetInteger64v;
+#define glGetInteger64v glad_glGetInteger64v
+typedef void (APIENTRYP PFNGLGETSYNCIVPROC)(GLsync sync, GLenum pname, GLsizei count, GLsizei *length, GLint *values);
+GLAPI PFNGLGETSYNCIVPROC glad_glGetSynciv;
+#define glGetSynciv glad_glGetSynciv
+typedef void (APIENTRYP PFNGLGETINTEGER64I_VPROC)(GLenum target, GLuint index, GLint64 *data);
+GLAPI PFNGLGETINTEGER64I_VPROC glad_glGetInteger64i_v;
+#define glGetInteger64i_v glad_glGetInteger64i_v
+typedef void (APIENTRYP PFNGLGETBUFFERPARAMETERI64VPROC)(GLenum target, GLenum pname, GLint64 *params);
+GLAPI PFNGLGETBUFFERPARAMETERI64VPROC glad_glGetBufferParameteri64v;
+#define glGetBufferParameteri64v glad_glGetBufferParameteri64v
+typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTUREPROC)(GLenum target, GLenum attachment, GLuint texture, GLint level);
+GLAPI PFNGLFRAMEBUFFERTEXTUREPROC glad_glFramebufferTexture;
+#define glFramebufferTexture glad_glFramebufferTexture
+typedef void (APIENTRYP PFNGLTEXIMAGE2DMULTISAMPLEPROC)(GLenum target, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height, GLboolean fixedsamplelocations);
+GLAPI PFNGLTEXIMAGE2DMULTISAMPLEPROC glad_glTexImage2DMultisample;
+#define glTexImage2DMultisample glad_glTexImage2DMultisample
+typedef void (APIENTRYP PFNGLTEXIMAGE3DMULTISAMPLEPROC)(GLenum target, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLboolean fixedsamplelocations);
+GLAPI PFNGLTEXIMAGE3DMULTISAMPLEPROC glad_glTexImage3DMultisample;
+#define glTexImage3DMultisample glad_glTexImage3DMultisample
+typedef void (APIENTRYP PFNGLGETMULTISAMPLEFVPROC)(GLenum pname, GLuint index, GLfloat *val);
+GLAPI PFNGLGETMULTISAMPLEFVPROC glad_glGetMultisamplefv;
+#define glGetMultisamplefv glad_glGetMultisamplefv
+typedef void (APIENTRYP PFNGLSAMPLEMASKIPROC)(GLuint maskNumber, GLbitfield mask);
+GLAPI PFNGLSAMPLEMASKIPROC glad_glSampleMaski;
+#define glSampleMaski glad_glSampleMaski
+#endif
+#ifndef GL_VERSION_3_3
+#define GL_VERSION_3_3 1
+GLAPI int GLAD_GL_VERSION_3_3;
+typedef void (APIENTRYP PFNGLBINDFRAGDATALOCATIONINDEXEDPROC)(GLuint program, GLuint colorNumber, GLuint index, const GLchar *name);
+GLAPI PFNGLBINDFRAGDATALOCATIONINDEXEDPROC glad_glBindFragDataLocationIndexed;
+#define glBindFragDataLocationIndexed glad_glBindFragDataLocationIndexed
+typedef GLint (APIENTRYP PFNGLGETFRAGDATAINDEXPROC)(GLuint program, const GLchar *name);
+GLAPI PFNGLGETFRAGDATAINDEXPROC glad_glGetFragDataIndex;
+#define glGetFragDataIndex glad_glGetFragDataIndex
+typedef void (APIENTRYP PFNGLGENSAMPLERSPROC)(GLsizei count, GLuint *samplers);
+GLAPI PFNGLGENSAMPLERSPROC glad_glGenSamplers;
+#define glGenSamplers glad_glGenSamplers
+typedef void (APIENTRYP PFNGLDELETESAMPLERSPROC)(GLsizei count, const GLuint *samplers);
+GLAPI PFNGLDELETESAMPLERSPROC glad_glDeleteSamplers;
+#define glDeleteSamplers glad_glDeleteSamplers
+typedef GLboolean (APIENTRYP PFNGLISSAMPLERPROC)(GLuint sampler);
+GLAPI PFNGLISSAMPLERPROC glad_glIsSampler;
+#define glIsSampler glad_glIsSampler
+typedef void (APIENTRYP PFNGLBINDSAMPLERPROC)(GLuint unit, GLuint sampler);
+GLAPI PFNGLBINDSAMPLERPROC glad_glBindSampler;
+#define glBindSampler glad_glBindSampler
+typedef void (APIENTRYP PFNGLSAMPLERPARAMETERIPROC)(GLuint sampler, GLenum pname, GLint param);
+GLAPI PFNGLSAMPLERPARAMETERIPROC glad_glSamplerParameteri;
+#define glSamplerParameteri glad_glSamplerParameteri
+typedef void (APIENTRYP PFNGLSAMPLERPARAMETERIVPROC)(GLuint sampler, GLenum pname, const GLint *param);
+GLAPI PFNGLSAMPLERPARAMETERIVPROC glad_glSamplerParameteriv;
+#define glSamplerParameteriv glad_glSamplerParameteriv
+typedef void (APIENTRYP PFNGLSAMPLERPARAMETERFPROC)(GLuint sampler, GLenum pname, GLfloat param);
+GLAPI PFNGLSAMPLERPARAMETERFPROC glad_glSamplerParameterf;
+#define glSamplerParameterf glad_glSamplerParameterf
+typedef void (APIENTRYP PFNGLSAMPLERPARAMETERFVPROC)(GLuint sampler, GLenum pname, const GLfloat *param);
+GLAPI PFNGLSAMPLERPARAMETERFVPROC glad_glSamplerParameterfv;
+#define glSamplerParameterfv glad_glSamplerParameterfv
+typedef void (APIENTRYP PFNGLSAMPLERPARAMETERIIVPROC)(GLuint sampler, GLenum pname, const GLint *param);
+GLAPI PFNGLSAMPLERPARAMETERIIVPROC glad_glSamplerParameterIiv;
+#define glSamplerParameterIiv glad_glSamplerParameterIiv
+typedef void (APIENTRYP PFNGLSAMPLERPARAMETERIUIVPROC)(GLuint sampler, GLenum pname, const GLuint *param);
+GLAPI PFNGLSAMPLERPARAMETERIUIVPROC glad_glSamplerParameterIuiv;
+#define glSamplerParameterIuiv glad_glSamplerParameterIuiv
+typedef void (APIENTRYP PFNGLGETSAMPLERPARAMETERIVPROC)(GLuint sampler, GLenum pname, GLint *params);
+GLAPI PFNGLGETSAMPLERPARAMETERIVPROC glad_glGetSamplerParameteriv;
+#define glGetSamplerParameteriv glad_glGetSamplerParameteriv
+typedef void (APIENTRYP PFNGLGETSAMPLERPARAMETERIIVPROC)(GLuint sampler, GLenum pname, GLint *params);
+GLAPI PFNGLGETSAMPLERPARAMETERIIVPROC glad_glGetSamplerParameterIiv;
+#define glGetSamplerParameterIiv glad_glGetSamplerParameterIiv
+typedef void (APIENTRYP PFNGLGETSAMPLERPARAMETERFVPROC)(GLuint sampler, GLenum pname, GLfloat *params);
+GLAPI PFNGLGETSAMPLERPARAMETERFVPROC glad_glGetSamplerParameterfv;
+#define glGetSamplerParameterfv glad_glGetSamplerParameterfv
+typedef void (APIENTRYP PFNGLGETSAMPLERPARAMETERIUIVPROC)(GLuint sampler, GLenum pname, GLuint *params);
+GLAPI PFNGLGETSAMPLERPARAMETERIUIVPROC glad_glGetSamplerParameterIuiv;
+#define glGetSamplerParameterIuiv glad_glGetSamplerParameterIuiv
+typedef void (APIENTRYP PFNGLQUERYCOUNTERPROC)(GLuint id, GLenum target);
+GLAPI PFNGLQUERYCOUNTERPROC glad_glQueryCounter;
+#define glQueryCounter glad_glQueryCounter
+typedef void (APIENTRYP PFNGLGETQUERYOBJECTI64VPROC)(GLuint id, GLenum pname, GLint64 *params);
+GLAPI PFNGLGETQUERYOBJECTI64VPROC glad_glGetQueryObjecti64v;
+#define glGetQueryObjecti64v glad_glGetQueryObjecti64v
+typedef void (APIENTRYP PFNGLGETQUERYOBJECTUI64VPROC)(GLuint id, GLenum pname, GLuint64 *params);
+GLAPI PFNGLGETQUERYOBJECTUI64VPROC glad_glGetQueryObjectui64v;
+#define glGetQueryObjectui64v glad_glGetQueryObjectui64v
+typedef void (APIENTRYP PFNGLVERTEXATTRIBDIVISORPROC)(GLuint index, GLuint divisor);
+GLAPI PFNGLVERTEXATTRIBDIVISORPROC glad_glVertexAttribDivisor;
+#define glVertexAttribDivisor glad_glVertexAttribDivisor
+typedef void (APIENTRYP PFNGLVERTEXATTRIBP1UIPROC)(GLuint index, GLenum type, GLboolean normalized, GLuint value);
+GLAPI PFNGLVERTEXATTRIBP1UIPROC glad_glVertexAttribP1ui;
+#define glVertexAttribP1ui glad_glVertexAttribP1ui
+typedef void (APIENTRYP PFNGLVERTEXATTRIBP1UIVPROC)(GLuint index, GLenum type, GLboolean normalized, const GLuint *value);
+GLAPI PFNGLVERTEXATTRIBP1UIVPROC glad_glVertexAttribP1uiv;
+#define glVertexAttribP1uiv glad_glVertexAttribP1uiv
+typedef void (APIENTRYP PFNGLVERTEXATTRIBP2UIPROC)(GLuint index, GLenum type, GLboolean normalized, GLuint value);
+GLAPI PFNGLVERTEXATTRIBP2UIPROC glad_glVertexAttribP2ui;
+#define glVertexAttribP2ui glad_glVertexAttribP2ui
+typedef void (APIENTRYP PFNGLVERTEXATTRIBP2UIVPROC)(GLuint index, GLenum type, GLboolean normalized, const GLuint *value);
+GLAPI PFNGLVERTEXATTRIBP2UIVPROC glad_glVertexAttribP2uiv;
+#define glVertexAttribP2uiv glad_glVertexAttribP2uiv
+typedef void (APIENTRYP PFNGLVERTEXATTRIBP3UIPROC)(GLuint index, GLenum type, GLboolean normalized, GLuint value);
+GLAPI PFNGLVERTEXATTRIBP3UIPROC glad_glVertexAttribP3ui;
+#define glVertexAttribP3ui glad_glVertexAttribP3ui
+typedef void (APIENTRYP PFNGLVERTEXATTRIBP3UIVPROC)(GLuint index, GLenum type, GLboolean normalized, const GLuint *value);
+GLAPI PFNGLVERTEXATTRIBP3UIVPROC glad_glVertexAttribP3uiv;
+#define glVertexAttribP3uiv glad_glVertexAttribP3uiv
+typedef void (APIENTRYP PFNGLVERTEXATTRIBP4UIPROC)(GLuint index, GLenum type, GLboolean normalized, GLuint value);
+GLAPI PFNGLVERTEXATTRIBP4UIPROC glad_glVertexAttribP4ui;
+#define glVertexAttribP4ui glad_glVertexAttribP4ui
+typedef void (APIENTRYP PFNGLVERTEXATTRIBP4UIVPROC)(GLuint index, GLenum type, GLboolean normalized, const GLuint *value);
+GLAPI PFNGLVERTEXATTRIBP4UIVPROC glad_glVertexAttribP4uiv;
+#define glVertexAttribP4uiv glad_glVertexAttribP4uiv
+typedef void (APIENTRYP PFNGLVERTEXP2UIPROC)(GLenum type, GLuint value);
+GLAPI PFNGLVERTEXP2UIPROC glad_glVertexP2ui;
+#define glVertexP2ui glad_glVertexP2ui
+typedef void (APIENTRYP PFNGLVERTEXP2UIVPROC)(GLenum type, const GLuint *value);
+GLAPI PFNGLVERTEXP2UIVPROC glad_glVertexP2uiv;
+#define glVertexP2uiv glad_glVertexP2uiv
+typedef void (APIENTRYP PFNGLVERTEXP3UIPROC)(GLenum type, GLuint value);
+GLAPI PFNGLVERTEXP3UIPROC glad_glVertexP3ui;
+#define glVertexP3ui glad_glVertexP3ui
+typedef void (APIENTRYP PFNGLVERTEXP3UIVPROC)(GLenum type, const GLuint *value);
+GLAPI PFNGLVERTEXP3UIVPROC glad_glVertexP3uiv;
+#define glVertexP3uiv glad_glVertexP3uiv
+typedef void (APIENTRYP PFNGLVERTEXP4UIPROC)(GLenum type, GLuint value);
+GLAPI PFNGLVERTEXP4UIPROC glad_glVertexP4ui;
+#define glVertexP4ui glad_glVertexP4ui
+typedef void (APIENTRYP PFNGLVERTEXP4UIVPROC)(GLenum type, const GLuint *value);
+GLAPI PFNGLVERTEXP4UIVPROC glad_glVertexP4uiv;
+#define glVertexP4uiv glad_glVertexP4uiv
+typedef void (APIENTRYP PFNGLTEXCOORDP1UIPROC)(GLenum type, GLuint coords);
+GLAPI PFNGLTEXCOORDP1UIPROC glad_glTexCoordP1ui;
+#define glTexCoordP1ui glad_glTexCoordP1ui
+typedef void (APIENTRYP PFNGLTEXCOORDP1UIVPROC)(GLenum type, const GLuint *coords);
+GLAPI PFNGLTEXCOORDP1UIVPROC glad_glTexCoordP1uiv;
+#define glTexCoordP1uiv glad_glTexCoordP1uiv
+typedef void (APIENTRYP PFNGLTEXCOORDP2UIPROC)(GLenum type, GLuint coords);
+GLAPI PFNGLTEXCOORDP2UIPROC glad_glTexCoordP2ui;
+#define glTexCoordP2ui glad_glTexCoordP2ui
+typedef void (APIENTRYP PFNGLTEXCOORDP2UIVPROC)(GLenum type, const GLuint *coords);
+GLAPI PFNGLTEXCOORDP2UIVPROC glad_glTexCoordP2uiv;
+#define glTexCoordP2uiv glad_glTexCoordP2uiv
+typedef void (APIENTRYP PFNGLTEXCOORDP3UIPROC)(GLenum type, GLuint coords);
+GLAPI PFNGLTEXCOORDP3UIPROC glad_glTexCoordP3ui;
+#define glTexCoordP3ui glad_glTexCoordP3ui
+typedef void (APIENTRYP PFNGLTEXCOORDP3UIVPROC)(GLenum type, const GLuint *coords);
+GLAPI PFNGLTEXCOORDP3UIVPROC glad_glTexCoordP3uiv;
+#define glTexCoordP3uiv glad_glTexCoordP3uiv
+typedef void (APIENTRYP PFNGLTEXCOORDP4UIPROC)(GLenum type, GLuint coords);
+GLAPI PFNGLTEXCOORDP4UIPROC glad_glTexCoordP4ui;
+#define glTexCoordP4ui glad_glTexCoordP4ui
+typedef void (APIENTRYP PFNGLTEXCOORDP4UIVPROC)(GLenum type, const GLuint *coords);
+GLAPI PFNGLTEXCOORDP4UIVPROC glad_glTexCoordP4uiv;
+#define glTexCoordP4uiv glad_glTexCoordP4uiv
+typedef void (APIENTRYP PFNGLMULTITEXCOORDP1UIPROC)(GLenum texture, GLenum type, GLuint coords);
+GLAPI PFNGLMULTITEXCOORDP1UIPROC glad_glMultiTexCoordP1ui;
+#define glMultiTexCoordP1ui glad_glMultiTexCoordP1ui
+typedef void (APIENTRYP PFNGLMULTITEXCOORDP1UIVPROC)(GLenum texture, GLenum type, const GLuint *coords);
+GLAPI PFNGLMULTITEXCOORDP1UIVPROC glad_glMultiTexCoordP1uiv;
+#define glMultiTexCoordP1uiv glad_glMultiTexCoordP1uiv
+typedef void (APIENTRYP PFNGLMULTITEXCOORDP2UIPROC)(GLenum texture, GLenum type, GLuint coords);
+GLAPI PFNGLMULTITEXCOORDP2UIPROC glad_glMultiTexCoordP2ui;
+#define glMultiTexCoordP2ui glad_glMultiTexCoordP2ui
+typedef void (APIENTRYP PFNGLMULTITEXCOORDP2UIVPROC)(GLenum texture, GLenum type, const GLuint *coords);
+GLAPI PFNGLMULTITEXCOORDP2UIVPROC glad_glMultiTexCoordP2uiv;
+#define glMultiTexCoordP2uiv glad_glMultiTexCoordP2uiv
+typedef void (APIENTRYP PFNGLMULTITEXCOORDP3UIPROC)(GLenum texture, GLenum type, GLuint coords);
+GLAPI PFNGLMULTITEXCOORDP3UIPROC glad_glMultiTexCoordP3ui;
+#define glMultiTexCoordP3ui glad_glMultiTexCoordP3ui
+typedef void (APIENTRYP PFNGLMULTITEXCOORDP3UIVPROC)(GLenum texture, GLenum type, const GLuint *coords);
+GLAPI PFNGLMULTITEXCOORDP3UIVPROC glad_glMultiTexCoordP3uiv;
+#define glMultiTexCoordP3uiv glad_glMultiTexCoordP3uiv
+typedef void (APIENTRYP PFNGLMULTITEXCOORDP4UIPROC)(GLenum texture, GLenum type, GLuint coords);
+GLAPI PFNGLMULTITEXCOORDP4UIPROC glad_glMultiTexCoordP4ui;
+#define glMultiTexCoordP4ui glad_glMultiTexCoordP4ui
+typedef void (APIENTRYP PFNGLMULTITEXCOORDP4UIVPROC)(GLenum texture, GLenum type, const GLuint *coords);
+GLAPI PFNGLMULTITEXCOORDP4UIVPROC glad_glMultiTexCoordP4uiv;
+#define glMultiTexCoordP4uiv glad_glMultiTexCoordP4uiv
+typedef void (APIENTRYP PFNGLNORMALP3UIPROC)(GLenum type, GLuint coords);
+GLAPI PFNGLNORMALP3UIPROC glad_glNormalP3ui;
+#define glNormalP3ui glad_glNormalP3ui
+typedef void (APIENTRYP PFNGLNORMALP3UIVPROC)(GLenum type, const GLuint *coords);
+GLAPI PFNGLNORMALP3UIVPROC glad_glNormalP3uiv;
+#define glNormalP3uiv glad_glNormalP3uiv
+typedef void (APIENTRYP PFNGLCOLORP3UIPROC)(GLenum type, GLuint color);
+GLAPI PFNGLCOLORP3UIPROC glad_glColorP3ui;
+#define glColorP3ui glad_glColorP3ui
+typedef void (APIENTRYP PFNGLCOLORP3UIVPROC)(GLenum type, const GLuint *color);
+GLAPI PFNGLCOLORP3UIVPROC glad_glColorP3uiv;
+#define glColorP3uiv glad_glColorP3uiv
+typedef void (APIENTRYP PFNGLCOLORP4UIPROC)(GLenum type, GLuint color);
+GLAPI PFNGLCOLORP4UIPROC glad_glColorP4ui;
+#define glColorP4ui glad_glColorP4ui
+typedef void (APIENTRYP PFNGLCOLORP4UIVPROC)(GLenum type, const GLuint *color);
+GLAPI PFNGLCOLORP4UIVPROC glad_glColorP4uiv;
+#define glColorP4uiv glad_glColorP4uiv
+typedef void (APIENTRYP PFNGLSECONDARYCOLORP3UIPROC)(GLenum type, GLuint color);
+GLAPI PFNGLSECONDARYCOLORP3UIPROC glad_glSecondaryColorP3ui;
+#define glSecondaryColorP3ui glad_glSecondaryColorP3ui
+typedef void (APIENTRYP PFNGLSECONDARYCOLORP3UIVPROC)(GLenum type, const GLuint *color);
+GLAPI PFNGLSECONDARYCOLORP3UIVPROC glad_glSecondaryColorP3uiv;
+#define glSecondaryColorP3uiv glad_glSecondaryColorP3uiv
+#endif
+#ifndef GL_VERSION_4_0
+#define GL_VERSION_4_0 1
+GLAPI int GLAD_GL_VERSION_4_0;
+typedef void (APIENTRYP PFNGLMINSAMPLESHADINGPROC)(GLfloat value);
+GLAPI PFNGLMINSAMPLESHADINGPROC glad_glMinSampleShading;
+#define glMinSampleShading glad_glMinSampleShading
+typedef void (APIENTRYP PFNGLBLENDEQUATIONIPROC)(GLuint buf, GLenum mode);
+GLAPI PFNGLBLENDEQUATIONIPROC glad_glBlendEquationi;
+#define glBlendEquationi glad_glBlendEquationi
+typedef void (APIENTRYP PFNGLBLENDEQUATIONSEPARATEIPROC)(GLuint buf, GLenum modeRGB, GLenum modeAlpha);
+GLAPI PFNGLBLENDEQUATIONSEPARATEIPROC glad_glBlendEquationSeparatei;
+#define glBlendEquationSeparatei glad_glBlendEquationSeparatei
+typedef void (APIENTRYP PFNGLBLENDFUNCIPROC)(GLuint buf, GLenum src, GLenum dst);
+GLAPI PFNGLBLENDFUNCIPROC glad_glBlendFunci;
+#define glBlendFunci glad_glBlendFunci
+typedef void (APIENTRYP PFNGLBLENDFUNCSEPARATEIPROC)(GLuint buf, GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha);
+GLAPI PFNGLBLENDFUNCSEPARATEIPROC glad_glBlendFuncSeparatei;
+#define glBlendFuncSeparatei glad_glBlendFuncSeparatei
+typedef void (APIENTRYP PFNGLDRAWARRAYSINDIRECTPROC)(GLenum mode, const void *indirect);
+GLAPI PFNGLDRAWARRAYSINDIRECTPROC glad_glDrawArraysIndirect;
+#define glDrawArraysIndirect glad_glDrawArraysIndirect
+typedef void (APIENTRYP PFNGLDRAWELEMENTSINDIRECTPROC)(GLenum mode, GLenum type, const void *indirect);
+GLAPI PFNGLDRAWELEMENTSINDIRECTPROC glad_glDrawElementsIndirect;
+#define glDrawElementsIndirect glad_glDrawElementsIndirect
+typedef void (APIENTRYP PFNGLUNIFORM1DPROC)(GLint location, GLdouble x);
+GLAPI PFNGLUNIFORM1DPROC glad_glUniform1d;
+#define glUniform1d glad_glUniform1d
+typedef void (APIENTRYP PFNGLUNIFORM2DPROC)(GLint location, GLdouble x, GLdouble y);
+GLAPI PFNGLUNIFORM2DPROC glad_glUniform2d;
+#define glUniform2d glad_glUniform2d
+typedef void (APIENTRYP PFNGLUNIFORM3DPROC)(GLint location, GLdouble x, GLdouble y, GLdouble z);
+GLAPI PFNGLUNIFORM3DPROC glad_glUniform3d;
+#define glUniform3d glad_glUniform3d
+typedef void (APIENTRYP PFNGLUNIFORM4DPROC)(GLint location, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+GLAPI PFNGLUNIFORM4DPROC glad_glUniform4d;
+#define glUniform4d glad_glUniform4d
+typedef void (APIENTRYP PFNGLUNIFORM1DVPROC)(GLint location, GLsizei count, const GLdouble *value);
+GLAPI PFNGLUNIFORM1DVPROC glad_glUniform1dv;
+#define glUniform1dv glad_glUniform1dv
+typedef void (APIENTRYP PFNGLUNIFORM2DVPROC)(GLint location, GLsizei count, const GLdouble *value);
+GLAPI PFNGLUNIFORM2DVPROC glad_glUniform2dv;
+#define glUniform2dv glad_glUniform2dv
+typedef void (APIENTRYP PFNGLUNIFORM3DVPROC)(GLint location, GLsizei count, const GLdouble *value);
+GLAPI PFNGLUNIFORM3DVPROC glad_glUniform3dv;
+#define glUniform3dv glad_glUniform3dv
+typedef void (APIENTRYP PFNGLUNIFORM4DVPROC)(GLint location, GLsizei count, const GLdouble *value);
+GLAPI PFNGLUNIFORM4DVPROC glad_glUniform4dv;
+#define glUniform4dv glad_glUniform4dv
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX2DVPROC)(GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI PFNGLUNIFORMMATRIX2DVPROC glad_glUniformMatrix2dv;
+#define glUniformMatrix2dv glad_glUniformMatrix2dv
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX3DVPROC)(GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI PFNGLUNIFORMMATRIX3DVPROC glad_glUniformMatrix3dv;
+#define glUniformMatrix3dv glad_glUniformMatrix3dv
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX4DVPROC)(GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI PFNGLUNIFORMMATRIX4DVPROC glad_glUniformMatrix4dv;
+#define glUniformMatrix4dv glad_glUniformMatrix4dv
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX2X3DVPROC)(GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI PFNGLUNIFORMMATRIX2X3DVPROC glad_glUniformMatrix2x3dv;
+#define glUniformMatrix2x3dv glad_glUniformMatrix2x3dv
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX2X4DVPROC)(GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI PFNGLUNIFORMMATRIX2X4DVPROC glad_glUniformMatrix2x4dv;
+#define glUniformMatrix2x4dv glad_glUniformMatrix2x4dv
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX3X2DVPROC)(GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI PFNGLUNIFORMMATRIX3X2DVPROC glad_glUniformMatrix3x2dv;
+#define glUniformMatrix3x2dv glad_glUniformMatrix3x2dv
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX3X4DVPROC)(GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI PFNGLUNIFORMMATRIX3X4DVPROC glad_glUniformMatrix3x4dv;
+#define glUniformMatrix3x4dv glad_glUniformMatrix3x4dv
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX4X2DVPROC)(GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI PFNGLUNIFORMMATRIX4X2DVPROC glad_glUniformMatrix4x2dv;
+#define glUniformMatrix4x2dv glad_glUniformMatrix4x2dv
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX4X3DVPROC)(GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI PFNGLUNIFORMMATRIX4X3DVPROC glad_glUniformMatrix4x3dv;
+#define glUniformMatrix4x3dv glad_glUniformMatrix4x3dv
+typedef void (APIENTRYP PFNGLGETUNIFORMDVPROC)(GLuint program, GLint location, GLdouble *params);
+GLAPI PFNGLGETUNIFORMDVPROC glad_glGetUniformdv;
+#define glGetUniformdv glad_glGetUniformdv
+typedef GLint (APIENTRYP PFNGLGETSUBROUTINEUNIFORMLOCATIONPROC)(GLuint program, GLenum shadertype, const GLchar *name);
+GLAPI PFNGLGETSUBROUTINEUNIFORMLOCATIONPROC glad_glGetSubroutineUniformLocation;
+#define glGetSubroutineUniformLocation glad_glGetSubroutineUniformLocation
+typedef GLuint (APIENTRYP PFNGLGETSUBROUTINEINDEXPROC)(GLuint program, GLenum shadertype, const GLchar *name);
+GLAPI PFNGLGETSUBROUTINEINDEXPROC glad_glGetSubroutineIndex;
+#define glGetSubroutineIndex glad_glGetSubroutineIndex
+typedef void (APIENTRYP PFNGLGETACTIVESUBROUTINEUNIFORMIVPROC)(GLuint program, GLenum shadertype, GLuint index, GLenum pname, GLint *values);
+GLAPI PFNGLGETACTIVESUBROUTINEUNIFORMIVPROC glad_glGetActiveSubroutineUniformiv;
+#define glGetActiveSubroutineUniformiv glad_glGetActiveSubroutineUniformiv
+typedef void (APIENTRYP PFNGLGETACTIVESUBROUTINEUNIFORMNAMEPROC)(GLuint program, GLenum shadertype, GLuint index, GLsizei bufSize, GLsizei *length, GLchar *name);
+GLAPI PFNGLGETACTIVESUBROUTINEUNIFORMNAMEPROC glad_glGetActiveSubroutineUniformName;
+#define glGetActiveSubroutineUniformName glad_glGetActiveSubroutineUniformName
+typedef void (APIENTRYP PFNGLGETACTIVESUBROUTINENAMEPROC)(GLuint program, GLenum shadertype, GLuint index, GLsizei bufSize, GLsizei *length, GLchar *name);
+GLAPI PFNGLGETACTIVESUBROUTINENAMEPROC glad_glGetActiveSubroutineName;
+#define glGetActiveSubroutineName glad_glGetActiveSubroutineName
+typedef void (APIENTRYP PFNGLUNIFORMSUBROUTINESUIVPROC)(GLenum shadertype, GLsizei count, const GLuint *indices);
+GLAPI PFNGLUNIFORMSUBROUTINESUIVPROC glad_glUniformSubroutinesuiv;
+#define glUniformSubroutinesuiv glad_glUniformSubroutinesuiv
+typedef void (APIENTRYP PFNGLGETUNIFORMSUBROUTINEUIVPROC)(GLenum shadertype, GLint location, GLuint *params);
+GLAPI PFNGLGETUNIFORMSUBROUTINEUIVPROC glad_glGetUniformSubroutineuiv;
+#define glGetUniformSubroutineuiv glad_glGetUniformSubroutineuiv
+typedef void (APIENTRYP PFNGLGETPROGRAMSTAGEIVPROC)(GLuint program, GLenum shadertype, GLenum pname, GLint *values);
+GLAPI PFNGLGETPROGRAMSTAGEIVPROC glad_glGetProgramStageiv;
+#define glGetProgramStageiv glad_glGetProgramStageiv
+typedef void (APIENTRYP PFNGLPATCHPARAMETERIPROC)(GLenum pname, GLint value);
+GLAPI PFNGLPATCHPARAMETERIPROC glad_glPatchParameteri;
+#define glPatchParameteri glad_glPatchParameteri
+typedef void (APIENTRYP PFNGLPATCHPARAMETERFVPROC)(GLenum pname, const GLfloat *values);
+GLAPI PFNGLPATCHPARAMETERFVPROC glad_glPatchParameterfv;
+#define glPatchParameterfv glad_glPatchParameterfv
+typedef void (APIENTRYP PFNGLBINDTRANSFORMFEEDBACKPROC)(GLenum target, GLuint id);
+GLAPI PFNGLBINDTRANSFORMFEEDBACKPROC glad_glBindTransformFeedback;
+#define glBindTransformFeedback glad_glBindTransformFeedback
+typedef void (APIENTRYP PFNGLDELETETRANSFORMFEEDBACKSPROC)(GLsizei n, const GLuint *ids);
+GLAPI PFNGLDELETETRANSFORMFEEDBACKSPROC glad_glDeleteTransformFeedbacks;
+#define glDeleteTransformFeedbacks glad_glDeleteTransformFeedbacks
+typedef void (APIENTRYP PFNGLGENTRANSFORMFEEDBACKSPROC)(GLsizei n, GLuint *ids);
+GLAPI PFNGLGENTRANSFORMFEEDBACKSPROC glad_glGenTransformFeedbacks;
+#define glGenTransformFeedbacks glad_glGenTransformFeedbacks
+typedef GLboolean (APIENTRYP PFNGLISTRANSFORMFEEDBACKPROC)(GLuint id);
+GLAPI PFNGLISTRANSFORMFEEDBACKPROC glad_glIsTransformFeedback;
+#define glIsTransformFeedback glad_glIsTransformFeedback
+typedef void (APIENTRYP PFNGLPAUSETRANSFORMFEEDBACKPROC)(void);
+GLAPI PFNGLPAUSETRANSFORMFEEDBACKPROC glad_glPauseTransformFeedback;
+#define glPauseTransformFeedback glad_glPauseTransformFeedback
+typedef void (APIENTRYP PFNGLRESUMETRANSFORMFEEDBACKPROC)(void);
+GLAPI PFNGLRESUMETRANSFORMFEEDBACKPROC glad_glResumeTransformFeedback;
+#define glResumeTransformFeedback glad_glResumeTransformFeedback
+typedef void (APIENTRYP PFNGLDRAWTRANSFORMFEEDBACKPROC)(GLenum mode, GLuint id);
+GLAPI PFNGLDRAWTRANSFORMFEEDBACKPROC glad_glDrawTransformFeedback;
+#define glDrawTransformFeedback glad_glDrawTransformFeedback
+typedef void (APIENTRYP PFNGLDRAWTRANSFORMFEEDBACKSTREAMPROC)(GLenum mode, GLuint id, GLuint stream);
+GLAPI PFNGLDRAWTRANSFORMFEEDBACKSTREAMPROC glad_glDrawTransformFeedbackStream;
+#define glDrawTransformFeedbackStream glad_glDrawTransformFeedbackStream
+typedef void (APIENTRYP PFNGLBEGINQUERYINDEXEDPROC)(GLenum target, GLuint index, GLuint id);
+GLAPI PFNGLBEGINQUERYINDEXEDPROC glad_glBeginQueryIndexed;
+#define glBeginQueryIndexed glad_glBeginQueryIndexed
+typedef void (APIENTRYP PFNGLENDQUERYINDEXEDPROC)(GLenum target, GLuint index);
+GLAPI PFNGLENDQUERYINDEXEDPROC glad_glEndQueryIndexed;
+#define glEndQueryIndexed glad_glEndQueryIndexed
+typedef void (APIENTRYP PFNGLGETQUERYINDEXEDIVPROC)(GLenum target, GLuint index, GLenum pname, GLint *params);
+GLAPI PFNGLGETQUERYINDEXEDIVPROC glad_glGetQueryIndexediv;
+#define glGetQueryIndexediv glad_glGetQueryIndexediv
+#endif
+#ifndef GL_VERSION_4_1
+#define GL_VERSION_4_1 1
+GLAPI int GLAD_GL_VERSION_4_1;
+typedef void (APIENTRYP PFNGLRELEASESHADERCOMPILERPROC)(void);
+GLAPI PFNGLRELEASESHADERCOMPILERPROC glad_glReleaseShaderCompiler;
+#define glReleaseShaderCompiler glad_glReleaseShaderCompiler
+typedef void (APIENTRYP PFNGLSHADERBINARYPROC)(GLsizei count, const GLuint *shaders, GLenum binaryformat, const void *binary, GLsizei length);
+GLAPI PFNGLSHADERBINARYPROC glad_glShaderBinary;
+#define glShaderBinary glad_glShaderBinary
+typedef void (APIENTRYP PFNGLGETSHADERPRECISIONFORMATPROC)(GLenum shadertype, GLenum precisiontype, GLint *range, GLint *precision);
+GLAPI PFNGLGETSHADERPRECISIONFORMATPROC glad_glGetShaderPrecisionFormat;
+#define glGetShaderPrecisionFormat glad_glGetShaderPrecisionFormat
+typedef void (APIENTRYP PFNGLDEPTHRANGEFPROC)(GLfloat n, GLfloat f);
+GLAPI PFNGLDEPTHRANGEFPROC glad_glDepthRangef;
+#define glDepthRangef glad_glDepthRangef
+typedef void (APIENTRYP PFNGLCLEARDEPTHFPROC)(GLfloat d);
+GLAPI PFNGLCLEARDEPTHFPROC glad_glClearDepthf;
+#define glClearDepthf glad_glClearDepthf
+typedef void (APIENTRYP PFNGLGETPROGRAMBINARYPROC)(GLuint program, GLsizei bufSize, GLsizei *length, GLenum *binaryFormat, void *binary);
+GLAPI PFNGLGETPROGRAMBINARYPROC glad_glGetProgramBinary;
+#define glGetProgramBinary glad_glGetProgramBinary
+typedef void (APIENTRYP PFNGLPROGRAMBINARYPROC)(GLuint program, GLenum binaryFormat, const void *binary, GLsizei length);
+GLAPI PFNGLPROGRAMBINARYPROC glad_glProgramBinary;
+#define glProgramBinary glad_glProgramBinary
+typedef void (APIENTRYP PFNGLPROGRAMPARAMETERIPROC)(GLuint program, GLenum pname, GLint value);
+GLAPI PFNGLPROGRAMPARAMETERIPROC glad_glProgramParameteri;
+#define glProgramParameteri glad_glProgramParameteri
+typedef void (APIENTRYP PFNGLUSEPROGRAMSTAGESPROC)(GLuint pipeline, GLbitfield stages, GLuint program);
+GLAPI PFNGLUSEPROGRAMSTAGESPROC glad_glUseProgramStages;
+#define glUseProgramStages glad_glUseProgramStages
+typedef void (APIENTRYP PFNGLACTIVESHADERPROGRAMPROC)(GLuint pipeline, GLuint program);
+GLAPI PFNGLACTIVESHADERPROGRAMPROC glad_glActiveShaderProgram;
+#define glActiveShaderProgram glad_glActiveShaderProgram
+typedef GLuint (APIENTRYP PFNGLCREATESHADERPROGRAMVPROC)(GLenum type, GLsizei count, const GLchar *const*strings);
+GLAPI PFNGLCREATESHADERPROGRAMVPROC glad_glCreateShaderProgramv;
+#define glCreateShaderProgramv glad_glCreateShaderProgramv
+typedef void (APIENTRYP PFNGLBINDPROGRAMPIPELINEPROC)(GLuint pipeline);
+GLAPI PFNGLBINDPROGRAMPIPELINEPROC glad_glBindProgramPipeline;
+#define glBindProgramPipeline glad_glBindProgramPipeline
+typedef void (APIENTRYP PFNGLDELETEPROGRAMPIPELINESPROC)(GLsizei n, const GLuint *pipelines);
+GLAPI PFNGLDELETEPROGRAMPIPELINESPROC glad_glDeleteProgramPipelines;
+#define glDeleteProgramPipelines glad_glDeleteProgramPipelines
+typedef void (APIENTRYP PFNGLGENPROGRAMPIPELINESPROC)(GLsizei n, GLuint *pipelines);
+GLAPI PFNGLGENPROGRAMPIPELINESPROC glad_glGenProgramPipelines;
+#define glGenProgramPipelines glad_glGenProgramPipelines
+typedef GLboolean (APIENTRYP PFNGLISPROGRAMPIPELINEPROC)(GLuint pipeline);
+GLAPI PFNGLISPROGRAMPIPELINEPROC glad_glIsProgramPipeline;
+#define glIsProgramPipeline glad_glIsProgramPipeline
+typedef void (APIENTRYP PFNGLGETPROGRAMPIPELINEIVPROC)(GLuint pipeline, GLenum pname, GLint *params);
+GLAPI PFNGLGETPROGRAMPIPELINEIVPROC glad_glGetProgramPipelineiv;
+#define glGetProgramPipelineiv glad_glGetProgramPipelineiv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1IPROC)(GLuint program, GLint location, GLint v0);
+GLAPI PFNGLPROGRAMUNIFORM1IPROC glad_glProgramUniform1i;
+#define glProgramUniform1i glad_glProgramUniform1i
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1IVPROC)(GLuint program, GLint location, GLsizei count, const GLint *value);
+GLAPI PFNGLPROGRAMUNIFORM1IVPROC glad_glProgramUniform1iv;
+#define glProgramUniform1iv glad_glProgramUniform1iv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1FPROC)(GLuint program, GLint location, GLfloat v0);
+GLAPI PFNGLPROGRAMUNIFORM1FPROC glad_glProgramUniform1f;
+#define glProgramUniform1f glad_glProgramUniform1f
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1FVPROC)(GLuint program, GLint location, GLsizei count, const GLfloat *value);
+GLAPI PFNGLPROGRAMUNIFORM1FVPROC glad_glProgramUniform1fv;
+#define glProgramUniform1fv glad_glProgramUniform1fv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1DPROC)(GLuint program, GLint location, GLdouble v0);
+GLAPI PFNGLPROGRAMUNIFORM1DPROC glad_glProgramUniform1d;
+#define glProgramUniform1d glad_glProgramUniform1d
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1DVPROC)(GLuint program, GLint location, GLsizei count, const GLdouble *value);
+GLAPI PFNGLPROGRAMUNIFORM1DVPROC glad_glProgramUniform1dv;
+#define glProgramUniform1dv glad_glProgramUniform1dv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1UIPROC)(GLuint program, GLint location, GLuint v0);
+GLAPI PFNGLPROGRAMUNIFORM1UIPROC glad_glProgramUniform1ui;
+#define glProgramUniform1ui glad_glProgramUniform1ui
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1UIVPROC)(GLuint program, GLint location, GLsizei count, const GLuint *value);
+GLAPI PFNGLPROGRAMUNIFORM1UIVPROC glad_glProgramUniform1uiv;
+#define glProgramUniform1uiv glad_glProgramUniform1uiv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2IPROC)(GLuint program, GLint location, GLint v0, GLint v1);
+GLAPI PFNGLPROGRAMUNIFORM2IPROC glad_glProgramUniform2i;
+#define glProgramUniform2i glad_glProgramUniform2i
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2IVPROC)(GLuint program, GLint location, GLsizei count, const GLint *value);
+GLAPI PFNGLPROGRAMUNIFORM2IVPROC glad_glProgramUniform2iv;
+#define glProgramUniform2iv glad_glProgramUniform2iv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2FPROC)(GLuint program, GLint location, GLfloat v0, GLfloat v1);
+GLAPI PFNGLPROGRAMUNIFORM2FPROC glad_glProgramUniform2f;
+#define glProgramUniform2f glad_glProgramUniform2f
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2FVPROC)(GLuint program, GLint location, GLsizei count, const GLfloat *value);
+GLAPI PFNGLPROGRAMUNIFORM2FVPROC glad_glProgramUniform2fv;
+#define glProgramUniform2fv glad_glProgramUniform2fv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2DPROC)(GLuint program, GLint location, GLdouble v0, GLdouble v1);
+GLAPI PFNGLPROGRAMUNIFORM2DPROC glad_glProgramUniform2d;
+#define glProgramUniform2d glad_glProgramUniform2d
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2DVPROC)(GLuint program, GLint location, GLsizei count, const GLdouble *value);
+GLAPI PFNGLPROGRAMUNIFORM2DVPROC glad_glProgramUniform2dv;
+#define glProgramUniform2dv glad_glProgramUniform2dv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2UIPROC)(GLuint program, GLint location, GLuint v0, GLuint v1);
+GLAPI PFNGLPROGRAMUNIFORM2UIPROC glad_glProgramUniform2ui;
+#define glProgramUniform2ui glad_glProgramUniform2ui
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2UIVPROC)(GLuint program, GLint location, GLsizei count, const GLuint *value);
+GLAPI PFNGLPROGRAMUNIFORM2UIVPROC glad_glProgramUniform2uiv;
+#define glProgramUniform2uiv glad_glProgramUniform2uiv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3IPROC)(GLuint program, GLint location, GLint v0, GLint v1, GLint v2);
+GLAPI PFNGLPROGRAMUNIFORM3IPROC glad_glProgramUniform3i;
+#define glProgramUniform3i glad_glProgramUniform3i
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3IVPROC)(GLuint program, GLint location, GLsizei count, const GLint *value);
+GLAPI PFNGLPROGRAMUNIFORM3IVPROC glad_glProgramUniform3iv;
+#define glProgramUniform3iv glad_glProgramUniform3iv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3FPROC)(GLuint program, GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
+GLAPI PFNGLPROGRAMUNIFORM3FPROC glad_glProgramUniform3f;
+#define glProgramUniform3f glad_glProgramUniform3f
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3FVPROC)(GLuint program, GLint location, GLsizei count, const GLfloat *value);
+GLAPI PFNGLPROGRAMUNIFORM3FVPROC glad_glProgramUniform3fv;
+#define glProgramUniform3fv glad_glProgramUniform3fv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3DPROC)(GLuint program, GLint location, GLdouble v0, GLdouble v1, GLdouble v2);
+GLAPI PFNGLPROGRAMUNIFORM3DPROC glad_glProgramUniform3d;
+#define glProgramUniform3d glad_glProgramUniform3d
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3DVPROC)(GLuint program, GLint location, GLsizei count, const GLdouble *value);
+GLAPI PFNGLPROGRAMUNIFORM3DVPROC glad_glProgramUniform3dv;
+#define glProgramUniform3dv glad_glProgramUniform3dv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3UIPROC)(GLuint program, GLint location, GLuint v0, GLuint v1, GLuint v2);
+GLAPI PFNGLPROGRAMUNIFORM3UIPROC glad_glProgramUniform3ui;
+#define glProgramUniform3ui glad_glProgramUniform3ui
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3UIVPROC)(GLuint program, GLint location, GLsizei count, const GLuint *value);
+GLAPI PFNGLPROGRAMUNIFORM3UIVPROC glad_glProgramUniform3uiv;
+#define glProgramUniform3uiv glad_glProgramUniform3uiv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4IPROC)(GLuint program, GLint location, GLint v0, GLint v1, GLint v2, GLint v3);
+GLAPI PFNGLPROGRAMUNIFORM4IPROC glad_glProgramUniform4i;
+#define glProgramUniform4i glad_glProgramUniform4i
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4IVPROC)(GLuint program, GLint location, GLsizei count, const GLint *value);
+GLAPI PFNGLPROGRAMUNIFORM4IVPROC glad_glProgramUniform4iv;
+#define glProgramUniform4iv glad_glProgramUniform4iv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4FPROC)(GLuint program, GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
+GLAPI PFNGLPROGRAMUNIFORM4FPROC glad_glProgramUniform4f;
+#define glProgramUniform4f glad_glProgramUniform4f
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4FVPROC)(GLuint program, GLint location, GLsizei count, const GLfloat *value);
+GLAPI PFNGLPROGRAMUNIFORM4FVPROC glad_glProgramUniform4fv;
+#define glProgramUniform4fv glad_glProgramUniform4fv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4DPROC)(GLuint program, GLint location, GLdouble v0, GLdouble v1, GLdouble v2, GLdouble v3);
+GLAPI PFNGLPROGRAMUNIFORM4DPROC glad_glProgramUniform4d;
+#define glProgramUniform4d glad_glProgramUniform4d
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4DVPROC)(GLuint program, GLint location, GLsizei count, const GLdouble *value);
+GLAPI PFNGLPROGRAMUNIFORM4DVPROC glad_glProgramUniform4dv;
+#define glProgramUniform4dv glad_glProgramUniform4dv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4UIPROC)(GLuint program, GLint location, GLuint v0, GLuint v1, GLuint v2, GLuint v3);
+GLAPI PFNGLPROGRAMUNIFORM4UIPROC glad_glProgramUniform4ui;
+#define glProgramUniform4ui glad_glProgramUniform4ui
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4UIVPROC)(GLuint program, GLint location, GLsizei count, const GLuint *value);
+GLAPI PFNGLPROGRAMUNIFORM4UIVPROC glad_glProgramUniform4uiv;
+#define glProgramUniform4uiv glad_glProgramUniform4uiv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2FVPROC)(GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI PFNGLPROGRAMUNIFORMMATRIX2FVPROC glad_glProgramUniformMatrix2fv;
+#define glProgramUniformMatrix2fv glad_glProgramUniformMatrix2fv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3FVPROC)(GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI PFNGLPROGRAMUNIFORMMATRIX3FVPROC glad_glProgramUniformMatrix3fv;
+#define glProgramUniformMatrix3fv glad_glProgramUniformMatrix3fv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4FVPROC)(GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI PFNGLPROGRAMUNIFORMMATRIX4FVPROC glad_glProgramUniformMatrix4fv;
+#define glProgramUniformMatrix4fv glad_glProgramUniformMatrix4fv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2DVPROC)(GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI PFNGLPROGRAMUNIFORMMATRIX2DVPROC glad_glProgramUniformMatrix2dv;
+#define glProgramUniformMatrix2dv glad_glProgramUniformMatrix2dv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3DVPROC)(GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI PFNGLPROGRAMUNIFORMMATRIX3DVPROC glad_glProgramUniformMatrix3dv;
+#define glProgramUniformMatrix3dv glad_glProgramUniformMatrix3dv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4DVPROC)(GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI PFNGLPROGRAMUNIFORMMATRIX4DVPROC glad_glProgramUniformMatrix4dv;
+#define glProgramUniformMatrix4dv glad_glProgramUniformMatrix4dv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2X3FVPROC)(GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI PFNGLPROGRAMUNIFORMMATRIX2X3FVPROC glad_glProgramUniformMatrix2x3fv;
+#define glProgramUniformMatrix2x3fv glad_glProgramUniformMatrix2x3fv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3X2FVPROC)(GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI PFNGLPROGRAMUNIFORMMATRIX3X2FVPROC glad_glProgramUniformMatrix3x2fv;
+#define glProgramUniformMatrix3x2fv glad_glProgramUniformMatrix3x2fv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2X4FVPROC)(GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI PFNGLPROGRAMUNIFORMMATRIX2X4FVPROC glad_glProgramUniformMatrix2x4fv;
+#define glProgramUniformMatrix2x4fv glad_glProgramUniformMatrix2x4fv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4X2FVPROC)(GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI PFNGLPROGRAMUNIFORMMATRIX4X2FVPROC glad_glProgramUniformMatrix4x2fv;
+#define glProgramUniformMatrix4x2fv glad_glProgramUniformMatrix4x2fv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3X4FVPROC)(GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI PFNGLPROGRAMUNIFORMMATRIX3X4FVPROC glad_glProgramUniformMatrix3x4fv;
+#define glProgramUniformMatrix3x4fv glad_glProgramUniformMatrix3x4fv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4X3FVPROC)(GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI PFNGLPROGRAMUNIFORMMATRIX4X3FVPROC glad_glProgramUniformMatrix4x3fv;
+#define glProgramUniformMatrix4x3fv glad_glProgramUniformMatrix4x3fv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2X3DVPROC)(GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI PFNGLPROGRAMUNIFORMMATRIX2X3DVPROC glad_glProgramUniformMatrix2x3dv;
+#define glProgramUniformMatrix2x3dv glad_glProgramUniformMatrix2x3dv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3X2DVPROC)(GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI PFNGLPROGRAMUNIFORMMATRIX3X2DVPROC glad_glProgramUniformMatrix3x2dv;
+#define glProgramUniformMatrix3x2dv glad_glProgramUniformMatrix3x2dv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2X4DVPROC)(GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI PFNGLPROGRAMUNIFORMMATRIX2X4DVPROC glad_glProgramUniformMatrix2x4dv;
+#define glProgramUniformMatrix2x4dv glad_glProgramUniformMatrix2x4dv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4X2DVPROC)(GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI PFNGLPROGRAMUNIFORMMATRIX4X2DVPROC glad_glProgramUniformMatrix4x2dv;
+#define glProgramUniformMatrix4x2dv glad_glProgramUniformMatrix4x2dv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3X4DVPROC)(GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI PFNGLPROGRAMUNIFORMMATRIX3X4DVPROC glad_glProgramUniformMatrix3x4dv;
+#define glProgramUniformMatrix3x4dv glad_glProgramUniformMatrix3x4dv
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4X3DVPROC)(GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI PFNGLPROGRAMUNIFORMMATRIX4X3DVPROC glad_glProgramUniformMatrix4x3dv;
+#define glProgramUniformMatrix4x3dv glad_glProgramUniformMatrix4x3dv
+typedef void (APIENTRYP PFNGLVALIDATEPROGRAMPIPELINEPROC)(GLuint pipeline);
+GLAPI PFNGLVALIDATEPROGRAMPIPELINEPROC glad_glValidateProgramPipeline;
+#define glValidateProgramPipeline glad_glValidateProgramPipeline
+typedef void (APIENTRYP PFNGLGETPROGRAMPIPELINEINFOLOGPROC)(GLuint pipeline, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
+GLAPI PFNGLGETPROGRAMPIPELINEINFOLOGPROC glad_glGetProgramPipelineInfoLog;
+#define glGetProgramPipelineInfoLog glad_glGetProgramPipelineInfoLog
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL1DPROC)(GLuint index, GLdouble x);
+GLAPI PFNGLVERTEXATTRIBL1DPROC glad_glVertexAttribL1d;
+#define glVertexAttribL1d glad_glVertexAttribL1d
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL2DPROC)(GLuint index, GLdouble x, GLdouble y);
+GLAPI PFNGLVERTEXATTRIBL2DPROC glad_glVertexAttribL2d;
+#define glVertexAttribL2d glad_glVertexAttribL2d
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL3DPROC)(GLuint index, GLdouble x, GLdouble y, GLdouble z);
+GLAPI PFNGLVERTEXATTRIBL3DPROC glad_glVertexAttribL3d;
+#define glVertexAttribL3d glad_glVertexAttribL3d
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL4DPROC)(GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+GLAPI PFNGLVERTEXATTRIBL4DPROC glad_glVertexAttribL4d;
+#define glVertexAttribL4d glad_glVertexAttribL4d
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL1DVPROC)(GLuint index, const GLdouble *v);
+GLAPI PFNGLVERTEXATTRIBL1DVPROC glad_glVertexAttribL1dv;
+#define glVertexAttribL1dv glad_glVertexAttribL1dv
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL2DVPROC)(GLuint index, const GLdouble *v);
+GLAPI PFNGLVERTEXATTRIBL2DVPROC glad_glVertexAttribL2dv;
+#define glVertexAttribL2dv glad_glVertexAttribL2dv
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL3DVPROC)(GLuint index, const GLdouble *v);
+GLAPI PFNGLVERTEXATTRIBL3DVPROC glad_glVertexAttribL3dv;
+#define glVertexAttribL3dv glad_glVertexAttribL3dv
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL4DVPROC)(GLuint index, const GLdouble *v);
+GLAPI PFNGLVERTEXATTRIBL4DVPROC glad_glVertexAttribL4dv;
+#define glVertexAttribL4dv glad_glVertexAttribL4dv
+typedef void (APIENTRYP PFNGLVERTEXATTRIBLPOINTERPROC)(GLuint index, GLint size, GLenum type, GLsizei stride, const void *pointer);
+GLAPI PFNGLVERTEXATTRIBLPOINTERPROC glad_glVertexAttribLPointer;
+#define glVertexAttribLPointer glad_glVertexAttribLPointer
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBLDVPROC)(GLuint index, GLenum pname, GLdouble *params);
+GLAPI PFNGLGETVERTEXATTRIBLDVPROC glad_glGetVertexAttribLdv;
+#define glGetVertexAttribLdv glad_glGetVertexAttribLdv
+typedef void (APIENTRYP PFNGLVIEWPORTARRAYVPROC)(GLuint first, GLsizei count, const GLfloat *v);
+GLAPI PFNGLVIEWPORTARRAYVPROC glad_glViewportArrayv;
+#define glViewportArrayv glad_glViewportArrayv
+typedef void (APIENTRYP PFNGLVIEWPORTINDEXEDFPROC)(GLuint index, GLfloat x, GLfloat y, GLfloat w, GLfloat h);
+GLAPI PFNGLVIEWPORTINDEXEDFPROC glad_glViewportIndexedf;
+#define glViewportIndexedf glad_glViewportIndexedf
+typedef void (APIENTRYP PFNGLVIEWPORTINDEXEDFVPROC)(GLuint index, const GLfloat *v);
+GLAPI PFNGLVIEWPORTINDEXEDFVPROC glad_glViewportIndexedfv;
+#define glViewportIndexedfv glad_glViewportIndexedfv
+typedef void (APIENTRYP PFNGLSCISSORARRAYVPROC)(GLuint first, GLsizei count, const GLint *v);
+GLAPI PFNGLSCISSORARRAYVPROC glad_glScissorArrayv;
+#define glScissorArrayv glad_glScissorArrayv
+typedef void (APIENTRYP PFNGLSCISSORINDEXEDPROC)(GLuint index, GLint left, GLint bottom, GLsizei width, GLsizei height);
+GLAPI PFNGLSCISSORINDEXEDPROC glad_glScissorIndexed;
+#define glScissorIndexed glad_glScissorIndexed
+typedef void (APIENTRYP PFNGLSCISSORINDEXEDVPROC)(GLuint index, const GLint *v);
+GLAPI PFNGLSCISSORINDEXEDVPROC glad_glScissorIndexedv;
+#define glScissorIndexedv glad_glScissorIndexedv
+typedef void (APIENTRYP PFNGLDEPTHRANGEARRAYVPROC)(GLuint first, GLsizei count, const GLdouble *v);
+GLAPI PFNGLDEPTHRANGEARRAYVPROC glad_glDepthRangeArrayv;
+#define glDepthRangeArrayv glad_glDepthRangeArrayv
+typedef void (APIENTRYP PFNGLDEPTHRANGEINDEXEDPROC)(GLuint index, GLdouble n, GLdouble f);
+GLAPI PFNGLDEPTHRANGEINDEXEDPROC glad_glDepthRangeIndexed;
+#define glDepthRangeIndexed glad_glDepthRangeIndexed
+typedef void (APIENTRYP PFNGLGETFLOATI_VPROC)(GLenum target, GLuint index, GLfloat *data);
+GLAPI PFNGLGETFLOATI_VPROC glad_glGetFloati_v;
+#define glGetFloati_v glad_glGetFloati_v
+typedef void (APIENTRYP PFNGLGETDOUBLEI_VPROC)(GLenum target, GLuint index, GLdouble *data);
+GLAPI PFNGLGETDOUBLEI_VPROC glad_glGetDoublei_v;
+#define glGetDoublei_v glad_glGetDoublei_v
+#endif
+#ifndef GL_VERSION_4_2
+#define GL_VERSION_4_2 1
+GLAPI int GLAD_GL_VERSION_4_2;
+typedef void (APIENTRYP PFNGLDRAWARRAYSINSTANCEDBASEINSTANCEPROC)(GLenum mode, GLint first, GLsizei count, GLsizei instancecount, GLuint baseinstance);
+GLAPI PFNGLDRAWARRAYSINSTANCEDBASEINSTANCEPROC glad_glDrawArraysInstancedBaseInstance;
+#define glDrawArraysInstancedBaseInstance glad_glDrawArraysInstancedBaseInstance
+typedef void (APIENTRYP PFNGLDRAWELEMENTSINSTANCEDBASEINSTANCEPROC)(GLenum mode, GLsizei count, GLenum type, const void *indices, GLsizei instancecount, GLuint baseinstance);
+GLAPI PFNGLDRAWELEMENTSINSTANCEDBASEINSTANCEPROC glad_glDrawElementsInstancedBaseInstance;
+#define glDrawElementsInstancedBaseInstance glad_glDrawElementsInstancedBaseInstance
+typedef void (APIENTRYP PFNGLDRAWELEMENTSINSTANCEDBASEVERTEXBASEINSTANCEPROC)(GLenum mode, GLsizei count, GLenum type, const void *indices, GLsizei instancecount, GLint basevertex, GLuint baseinstance);
+GLAPI PFNGLDRAWELEMENTSINSTANCEDBASEVERTEXBASEINSTANCEPROC glad_glDrawElementsInstancedBaseVertexBaseInstance;
+#define glDrawElementsInstancedBaseVertexBaseInstance glad_glDrawElementsInstancedBaseVertexBaseInstance
+typedef void (APIENTRYP PFNGLGETINTERNALFORMATIVPROC)(GLenum target, GLenum internalformat, GLenum pname, GLsizei count, GLint *params);
+GLAPI PFNGLGETINTERNALFORMATIVPROC glad_glGetInternalformativ;
+#define glGetInternalformativ glad_glGetInternalformativ
+typedef void (APIENTRYP PFNGLGETACTIVEATOMICCOUNTERBUFFERIVPROC)(GLuint program, GLuint bufferIndex, GLenum pname, GLint *params);
+GLAPI PFNGLGETACTIVEATOMICCOUNTERBUFFERIVPROC glad_glGetActiveAtomicCounterBufferiv;
+#define glGetActiveAtomicCounterBufferiv glad_glGetActiveAtomicCounterBufferiv
+typedef void (APIENTRYP PFNGLBINDIMAGETEXTUREPROC)(GLuint unit, GLuint texture, GLint level, GLboolean layered, GLint layer, GLenum access, GLenum format);
+GLAPI PFNGLBINDIMAGETEXTUREPROC glad_glBindImageTexture;
+#define glBindImageTexture glad_glBindImageTexture
+typedef void (APIENTRYP PFNGLMEMORYBARRIERPROC)(GLbitfield barriers);
+GLAPI PFNGLMEMORYBARRIERPROC glad_glMemoryBarrier;
+#define glMemoryBarrier glad_glMemoryBarrier
+typedef void (APIENTRYP PFNGLTEXSTORAGE1DPROC)(GLenum target, GLsizei levels, GLenum internalformat, GLsizei width);
+GLAPI PFNGLTEXSTORAGE1DPROC glad_glTexStorage1D;
+#define glTexStorage1D glad_glTexStorage1D
+typedef void (APIENTRYP PFNGLTEXSTORAGE2DPROC)(GLenum target, GLsizei levels, GLenum internalformat, GLsizei width, GLsizei height);
+GLAPI PFNGLTEXSTORAGE2DPROC glad_glTexStorage2D;
+#define glTexStorage2D glad_glTexStorage2D
+typedef void (APIENTRYP PFNGLTEXSTORAGE3DPROC)(GLenum target, GLsizei levels, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth);
+GLAPI PFNGLTEXSTORAGE3DPROC glad_glTexStorage3D;
+#define glTexStorage3D glad_glTexStorage3D
+typedef void (APIENTRYP PFNGLDRAWTRANSFORMFEEDBACKINSTANCEDPROC)(GLenum mode, GLuint id, GLsizei instancecount);
+GLAPI PFNGLDRAWTRANSFORMFEEDBACKINSTANCEDPROC glad_glDrawTransformFeedbackInstanced;
+#define glDrawTransformFeedbackInstanced glad_glDrawTransformFeedbackInstanced
+typedef void (APIENTRYP PFNGLDRAWTRANSFORMFEEDBACKSTREAMINSTANCEDPROC)(GLenum mode, GLuint id, GLuint stream, GLsizei instancecount);
+GLAPI PFNGLDRAWTRANSFORMFEEDBACKSTREAMINSTANCEDPROC glad_glDrawTransformFeedbackStreamInstanced;
+#define glDrawTransformFeedbackStreamInstanced glad_glDrawTransformFeedbackStreamInstanced
+#endif
+#ifndef GL_VERSION_4_3
+#define GL_VERSION_4_3 1
+GLAPI int GLAD_GL_VERSION_4_3;
+typedef void (APIENTRYP PFNGLCLEARBUFFERDATAPROC)(GLenum target, GLenum internalformat, GLenum format, GLenum type, const void *data);
+GLAPI PFNGLCLEARBUFFERDATAPROC glad_glClearBufferData;
+#define glClearBufferData glad_glClearBufferData
+typedef void (APIENTRYP PFNGLCLEARBUFFERSUBDATAPROC)(GLenum target, GLenum internalformat, GLintptr offset, GLsizeiptr size, GLenum format, GLenum type, const void *data);
+GLAPI PFNGLCLEARBUFFERSUBDATAPROC glad_glClearBufferSubData;
+#define glClearBufferSubData glad_glClearBufferSubData
+typedef void (APIENTRYP PFNGLDISPATCHCOMPUTEPROC)(GLuint num_groups_x, GLuint num_groups_y, GLuint num_groups_z);
+GLAPI PFNGLDISPATCHCOMPUTEPROC glad_glDispatchCompute;
+#define glDispatchCompute glad_glDispatchCompute
+typedef void (APIENTRYP PFNGLDISPATCHCOMPUTEINDIRECTPROC)(GLintptr indirect);
+GLAPI PFNGLDISPATCHCOMPUTEINDIRECTPROC glad_glDispatchComputeIndirect;
+#define glDispatchComputeIndirect glad_glDispatchComputeIndirect
+typedef void (APIENTRYP PFNGLCOPYIMAGESUBDATAPROC)(GLuint srcName, GLenum srcTarget, GLint srcLevel, GLint srcX, GLint srcY, GLint srcZ, GLuint dstName, GLenum dstTarget, GLint dstLevel, GLint dstX, GLint dstY, GLint dstZ, GLsizei srcWidth, GLsizei srcHeight, GLsizei srcDepth);
+GLAPI PFNGLCOPYIMAGESUBDATAPROC glad_glCopyImageSubData;
+#define glCopyImageSubData glad_glCopyImageSubData
+typedef void (APIENTRYP PFNGLFRAMEBUFFERPARAMETERIPROC)(GLenum target, GLenum pname, GLint param);
+GLAPI PFNGLFRAMEBUFFERPARAMETERIPROC glad_glFramebufferParameteri;
+#define glFramebufferParameteri glad_glFramebufferParameteri
+typedef void (APIENTRYP PFNGLGETFRAMEBUFFERPARAMETERIVPROC)(GLenum target, GLenum pname, GLint *params);
+GLAPI PFNGLGETFRAMEBUFFERPARAMETERIVPROC glad_glGetFramebufferParameteriv;
+#define glGetFramebufferParameteriv glad_glGetFramebufferParameteriv
+typedef void (APIENTRYP PFNGLGETINTERNALFORMATI64VPROC)(GLenum target, GLenum internalformat, GLenum pname, GLsizei count, GLint64 *params);
+GLAPI PFNGLGETINTERNALFORMATI64VPROC glad_glGetInternalformati64v;
+#define glGetInternalformati64v glad_glGetInternalformati64v
+typedef void (APIENTRYP PFNGLINVALIDATETEXSUBIMAGEPROC)(GLuint texture, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth);
+GLAPI PFNGLINVALIDATETEXSUBIMAGEPROC glad_glInvalidateTexSubImage;
+#define glInvalidateTexSubImage glad_glInvalidateTexSubImage
+typedef void (APIENTRYP PFNGLINVALIDATETEXIMAGEPROC)(GLuint texture, GLint level);
+GLAPI PFNGLINVALIDATETEXIMAGEPROC glad_glInvalidateTexImage;
+#define glInvalidateTexImage glad_glInvalidateTexImage
+typedef void (APIENTRYP PFNGLINVALIDATEBUFFERSUBDATAPROC)(GLuint buffer, GLintptr offset, GLsizeiptr length);
+GLAPI PFNGLINVALIDATEBUFFERSUBDATAPROC glad_glInvalidateBufferSubData;
+#define glInvalidateBufferSubData glad_glInvalidateBufferSubData
+typedef void (APIENTRYP PFNGLINVALIDATEBUFFERDATAPROC)(GLuint buffer);
+GLAPI PFNGLINVALIDATEBUFFERDATAPROC glad_glInvalidateBufferData;
+#define glInvalidateBufferData glad_glInvalidateBufferData
+typedef void (APIENTRYP PFNGLINVALIDATEFRAMEBUFFERPROC)(GLenum target, GLsizei numAttachments, const GLenum *attachments);
+GLAPI PFNGLINVALIDATEFRAMEBUFFERPROC glad_glInvalidateFramebuffer;
+#define glInvalidateFramebuffer glad_glInvalidateFramebuffer
+typedef void (APIENTRYP PFNGLINVALIDATESUBFRAMEBUFFERPROC)(GLenum target, GLsizei numAttachments, const GLenum *attachments, GLint x, GLint y, GLsizei width, GLsizei height);
+GLAPI PFNGLINVALIDATESUBFRAMEBUFFERPROC glad_glInvalidateSubFramebuffer;
+#define glInvalidateSubFramebuffer glad_glInvalidateSubFramebuffer
+typedef void (APIENTRYP PFNGLMULTIDRAWARRAYSINDIRECTPROC)(GLenum mode, const void *indirect, GLsizei drawcount, GLsizei stride);
+GLAPI PFNGLMULTIDRAWARRAYSINDIRECTPROC glad_glMultiDrawArraysIndirect;
+#define glMultiDrawArraysIndirect glad_glMultiDrawArraysIndirect
+typedef void (APIENTRYP PFNGLMULTIDRAWELEMENTSINDIRECTPROC)(GLenum mode, GLenum type, const void *indirect, GLsizei drawcount, GLsizei stride);
+GLAPI PFNGLMULTIDRAWELEMENTSINDIRECTPROC glad_glMultiDrawElementsIndirect;
+#define glMultiDrawElementsIndirect glad_glMultiDrawElementsIndirect
+typedef void (APIENTRYP PFNGLGETPROGRAMINTERFACEIVPROC)(GLuint program, GLenum programInterface, GLenum pname, GLint *params);
+GLAPI PFNGLGETPROGRAMINTERFACEIVPROC glad_glGetProgramInterfaceiv;
+#define glGetProgramInterfaceiv glad_glGetProgramInterfaceiv
+typedef GLuint (APIENTRYP PFNGLGETPROGRAMRESOURCEINDEXPROC)(GLuint program, GLenum programInterface, const GLchar *name);
+GLAPI PFNGLGETPROGRAMRESOURCEINDEXPROC glad_glGetProgramResourceIndex;
+#define glGetProgramResourceIndex glad_glGetProgramResourceIndex
+typedef void (APIENTRYP PFNGLGETPROGRAMRESOURCENAMEPROC)(GLuint program, GLenum programInterface, GLuint index, GLsizei bufSize, GLsizei *length, GLchar *name);
+GLAPI PFNGLGETPROGRAMRESOURCENAMEPROC glad_glGetProgramResourceName;
+#define glGetProgramResourceName glad_glGetProgramResourceName
+typedef void (APIENTRYP PFNGLGETPROGRAMRESOURCEIVPROC)(GLuint program, GLenum programInterface, GLuint index, GLsizei propCount, const GLenum *props, GLsizei count, GLsizei *length, GLint *params);
+GLAPI PFNGLGETPROGRAMRESOURCEIVPROC glad_glGetProgramResourceiv;
+#define glGetProgramResourceiv glad_glGetProgramResourceiv
+typedef GLint (APIENTRYP PFNGLGETPROGRAMRESOURCELOCATIONPROC)(GLuint program, GLenum programInterface, const GLchar *name);
+GLAPI PFNGLGETPROGRAMRESOURCELOCATIONPROC glad_glGetProgramResourceLocation;
+#define glGetProgramResourceLocation glad_glGetProgramResourceLocation
+typedef GLint (APIENTRYP PFNGLGETPROGRAMRESOURCELOCATIONINDEXPROC)(GLuint program, GLenum programInterface, const GLchar *name);
+GLAPI PFNGLGETPROGRAMRESOURCELOCATIONINDEXPROC glad_glGetProgramResourceLocationIndex;
+#define glGetProgramResourceLocationIndex glad_glGetProgramResourceLocationIndex
+typedef void (APIENTRYP PFNGLSHADERSTORAGEBLOCKBINDINGPROC)(GLuint program, GLuint storageBlockIndex, GLuint storageBlockBinding);
+GLAPI PFNGLSHADERSTORAGEBLOCKBINDINGPROC glad_glShaderStorageBlockBinding;
+#define glShaderStorageBlockBinding glad_glShaderStorageBlockBinding
+typedef void (APIENTRYP PFNGLTEXBUFFERRANGEPROC)(GLenum target, GLenum internalformat, GLuint buffer, GLintptr offset, GLsizeiptr size);
+GLAPI PFNGLTEXBUFFERRANGEPROC glad_glTexBufferRange;
+#define glTexBufferRange glad_glTexBufferRange
+typedef void (APIENTRYP PFNGLTEXSTORAGE2DMULTISAMPLEPROC)(GLenum target, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height, GLboolean fixedsamplelocations);
+GLAPI PFNGLTEXSTORAGE2DMULTISAMPLEPROC glad_glTexStorage2DMultisample;
+#define glTexStorage2DMultisample glad_glTexStorage2DMultisample
+typedef void (APIENTRYP PFNGLTEXSTORAGE3DMULTISAMPLEPROC)(GLenum target, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLboolean fixedsamplelocations);
+GLAPI PFNGLTEXSTORAGE3DMULTISAMPLEPROC glad_glTexStorage3DMultisample;
+#define glTexStorage3DMultisample glad_glTexStorage3DMultisample
+typedef void (APIENTRYP PFNGLTEXTUREVIEWPROC)(GLuint texture, GLenum target, GLuint origtexture, GLenum internalformat, GLuint minlevel, GLuint numlevels, GLuint minlayer, GLuint numlayers);
+GLAPI PFNGLTEXTUREVIEWPROC glad_glTextureView;
+#define glTextureView glad_glTextureView
+typedef void (APIENTRYP PFNGLBINDVERTEXBUFFERPROC)(GLuint bindingindex, GLuint buffer, GLintptr offset, GLsizei stride);
+GLAPI PFNGLBINDVERTEXBUFFERPROC glad_glBindVertexBuffer;
+#define glBindVertexBuffer glad_glBindVertexBuffer
+typedef void (APIENTRYP PFNGLVERTEXATTRIBFORMATPROC)(GLuint attribindex, GLint size, GLenum type, GLboolean normalized, GLuint relativeoffset);
+GLAPI PFNGLVERTEXATTRIBFORMATPROC glad_glVertexAttribFormat;
+#define glVertexAttribFormat glad_glVertexAttribFormat
+typedef void (APIENTRYP PFNGLVERTEXATTRIBIFORMATPROC)(GLuint attribindex, GLint size, GLenum type, GLuint relativeoffset);
+GLAPI PFNGLVERTEXATTRIBIFORMATPROC glad_glVertexAttribIFormat;
+#define glVertexAttribIFormat glad_glVertexAttribIFormat
+typedef void (APIENTRYP PFNGLVERTEXATTRIBLFORMATPROC)(GLuint attribindex, GLint size, GLenum type, GLuint relativeoffset);
+GLAPI PFNGLVERTEXATTRIBLFORMATPROC glad_glVertexAttribLFormat;
+#define glVertexAttribLFormat glad_glVertexAttribLFormat
+typedef void (APIENTRYP PFNGLVERTEXATTRIBBINDINGPROC)(GLuint attribindex, GLuint bindingindex);
+GLAPI PFNGLVERTEXATTRIBBINDINGPROC glad_glVertexAttribBinding;
+#define glVertexAttribBinding glad_glVertexAttribBinding
+typedef void (APIENTRYP PFNGLVERTEXBINDINGDIVISORPROC)(GLuint bindingindex, GLuint divisor);
+GLAPI PFNGLVERTEXBINDINGDIVISORPROC glad_glVertexBindingDivisor;
+#define glVertexBindingDivisor glad_glVertexBindingDivisor
+typedef void (APIENTRYP PFNGLDEBUGMESSAGECONTROLPROC)(GLenum source, GLenum type, GLenum severity, GLsizei count, const GLuint *ids, GLboolean enabled);
+GLAPI PFNGLDEBUGMESSAGECONTROLPROC glad_glDebugMessageControl;
+#define glDebugMessageControl glad_glDebugMessageControl
+typedef void (APIENTRYP PFNGLDEBUGMESSAGEINSERTPROC)(GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar *buf);
+GLAPI PFNGLDEBUGMESSAGEINSERTPROC glad_glDebugMessageInsert;
+#define glDebugMessageInsert glad_glDebugMessageInsert
+typedef void (APIENTRYP PFNGLDEBUGMESSAGECALLBACKPROC)(GLDEBUGPROC callback, const void *userParam);
+GLAPI PFNGLDEBUGMESSAGECALLBACKPROC glad_glDebugMessageCallback;
+#define glDebugMessageCallback glad_glDebugMessageCallback
+typedef GLuint (APIENTRYP PFNGLGETDEBUGMESSAGELOGPROC)(GLuint count, GLsizei bufSize, GLenum *sources, GLenum *types, GLuint *ids, GLenum *severities, GLsizei *lengths, GLchar *messageLog);
+GLAPI PFNGLGETDEBUGMESSAGELOGPROC glad_glGetDebugMessageLog;
+#define glGetDebugMessageLog glad_glGetDebugMessageLog
+typedef void (APIENTRYP PFNGLPUSHDEBUGGROUPPROC)(GLenum source, GLuint id, GLsizei length, const GLchar *message);
+GLAPI PFNGLPUSHDEBUGGROUPPROC glad_glPushDebugGroup;
+#define glPushDebugGroup glad_glPushDebugGroup
+typedef void (APIENTRYP PFNGLPOPDEBUGGROUPPROC)(void);
+GLAPI PFNGLPOPDEBUGGROUPPROC glad_glPopDebugGroup;
+#define glPopDebugGroup glad_glPopDebugGroup
+typedef void (APIENTRYP PFNGLOBJECTLABELPROC)(GLenum identifier, GLuint name, GLsizei length, const GLchar *label);
+GLAPI PFNGLOBJECTLABELPROC glad_glObjectLabel;
+#define glObjectLabel glad_glObjectLabel
+typedef void (APIENTRYP PFNGLGETOBJECTLABELPROC)(GLenum identifier, GLuint name, GLsizei bufSize, GLsizei *length, GLchar *label);
+GLAPI PFNGLGETOBJECTLABELPROC glad_glGetObjectLabel;
+#define glGetObjectLabel glad_glGetObjectLabel
+typedef void (APIENTRYP PFNGLOBJECTPTRLABELPROC)(const void *ptr, GLsizei length, const GLchar *label);
+GLAPI PFNGLOBJECTPTRLABELPROC glad_glObjectPtrLabel;
+#define glObjectPtrLabel glad_glObjectPtrLabel
+typedef void (APIENTRYP PFNGLGETOBJECTPTRLABELPROC)(const void *ptr, GLsizei bufSize, GLsizei *length, GLchar *label);
+GLAPI PFNGLGETOBJECTPTRLABELPROC glad_glGetObjectPtrLabel;
+#define glGetObjectPtrLabel glad_glGetObjectPtrLabel
+typedef void (APIENTRYP PFNGLGETPOINTERVPROC)(GLenum pname, void **params);
+GLAPI PFNGLGETPOINTERVPROC glad_glGetPointerv;
+#define glGetPointerv glad_glGetPointerv
+#endif
+#ifndef GL_VERSION_4_4
+#define GL_VERSION_4_4 1
+GLAPI int GLAD_GL_VERSION_4_4;
+typedef void (APIENTRYP PFNGLBUFFERSTORAGEPROC)(GLenum target, GLsizeiptr size, const void *data, GLbitfield flags);
+GLAPI PFNGLBUFFERSTORAGEPROC glad_glBufferStorage;
+#define glBufferStorage glad_glBufferStorage
+typedef void (APIENTRYP PFNGLCLEARTEXIMAGEPROC)(GLuint texture, GLint level, GLenum format, GLenum type, const void *data);
+GLAPI PFNGLCLEARTEXIMAGEPROC glad_glClearTexImage;
+#define glClearTexImage glad_glClearTexImage
+typedef void (APIENTRYP PFNGLCLEARTEXSUBIMAGEPROC)(GLuint texture, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const void *data);
+GLAPI PFNGLCLEARTEXSUBIMAGEPROC glad_glClearTexSubImage;
+#define glClearTexSubImage glad_glClearTexSubImage
+typedef void (APIENTRYP PFNGLBINDBUFFERSBASEPROC)(GLenum target, GLuint first, GLsizei count, const GLuint *buffers);
+GLAPI PFNGLBINDBUFFERSBASEPROC glad_glBindBuffersBase;
+#define glBindBuffersBase glad_glBindBuffersBase
+typedef void (APIENTRYP PFNGLBINDBUFFERSRANGEPROC)(GLenum target, GLuint first, GLsizei count, const GLuint *buffers, const GLintptr *offsets, const GLsizeiptr *sizes);
+GLAPI PFNGLBINDBUFFERSRANGEPROC glad_glBindBuffersRange;
+#define glBindBuffersRange glad_glBindBuffersRange
+typedef void (APIENTRYP PFNGLBINDTEXTURESPROC)(GLuint first, GLsizei count, const GLuint *textures);
+GLAPI PFNGLBINDTEXTURESPROC glad_glBindTextures;
+#define glBindTextures glad_glBindTextures
+typedef void (APIENTRYP PFNGLBINDSAMPLERSPROC)(GLuint first, GLsizei count, const GLuint *samplers);
+GLAPI PFNGLBINDSAMPLERSPROC glad_glBindSamplers;
+#define glBindSamplers glad_glBindSamplers
+typedef void (APIENTRYP PFNGLBINDIMAGETEXTURESPROC)(GLuint first, GLsizei count, const GLuint *textures);
+GLAPI PFNGLBINDIMAGETEXTURESPROC glad_glBindImageTextures;
+#define glBindImageTextures glad_glBindImageTextures
+typedef void (APIENTRYP PFNGLBINDVERTEXBUFFERSPROC)(GLuint first, GLsizei count, const GLuint *buffers, const GLintptr *offsets, const GLsizei *strides);
+GLAPI PFNGLBINDVERTEXBUFFERSPROC glad_glBindVertexBuffers;
+#define glBindVertexBuffers glad_glBindVertexBuffers
+#endif
+#ifndef GL_VERSION_4_5
+#define GL_VERSION_4_5 1
+GLAPI int GLAD_GL_VERSION_4_5;
+typedef void (APIENTRYP PFNGLCLIPCONTROLPROC)(GLenum origin, GLenum depth);
+GLAPI PFNGLCLIPCONTROLPROC glad_glClipControl;
+#define glClipControl glad_glClipControl
+typedef void (APIENTRYP PFNGLCREATETRANSFORMFEEDBACKSPROC)(GLsizei n, GLuint *ids);
+GLAPI PFNGLCREATETRANSFORMFEEDBACKSPROC glad_glCreateTransformFeedbacks;
+#define glCreateTransformFeedbacks glad_glCreateTransformFeedbacks
+typedef void (APIENTRYP PFNGLTRANSFORMFEEDBACKBUFFERBASEPROC)(GLuint xfb, GLuint index, GLuint buffer);
+GLAPI PFNGLTRANSFORMFEEDBACKBUFFERBASEPROC glad_glTransformFeedbackBufferBase;
+#define glTransformFeedbackBufferBase glad_glTransformFeedbackBufferBase
+typedef void (APIENTRYP PFNGLTRANSFORMFEEDBACKBUFFERRANGEPROC)(GLuint xfb, GLuint index, GLuint buffer, GLintptr offset, GLsizeiptr size);
+GLAPI PFNGLTRANSFORMFEEDBACKBUFFERRANGEPROC glad_glTransformFeedbackBufferRange;
+#define glTransformFeedbackBufferRange glad_glTransformFeedbackBufferRange
+typedef void (APIENTRYP PFNGLGETTRANSFORMFEEDBACKIVPROC)(GLuint xfb, GLenum pname, GLint *param);
+GLAPI PFNGLGETTRANSFORMFEEDBACKIVPROC glad_glGetTransformFeedbackiv;
+#define glGetTransformFeedbackiv glad_glGetTransformFeedbackiv
+typedef void (APIENTRYP PFNGLGETTRANSFORMFEEDBACKI_VPROC)(GLuint xfb, GLenum pname, GLuint index, GLint *param);
+GLAPI PFNGLGETTRANSFORMFEEDBACKI_VPROC glad_glGetTransformFeedbacki_v;
+#define glGetTransformFeedbacki_v glad_glGetTransformFeedbacki_v
+typedef void (APIENTRYP PFNGLGETTRANSFORMFEEDBACKI64_VPROC)(GLuint xfb, GLenum pname, GLuint index, GLint64 *param);
+GLAPI PFNGLGETTRANSFORMFEEDBACKI64_VPROC glad_glGetTransformFeedbacki64_v;
+#define glGetTransformFeedbacki64_v glad_glGetTransformFeedbacki64_v
+typedef void (APIENTRYP PFNGLCREATEBUFFERSPROC)(GLsizei n, GLuint *buffers);
+GLAPI PFNGLCREATEBUFFERSPROC glad_glCreateBuffers;
+#define glCreateBuffers glad_glCreateBuffers
+typedef void (APIENTRYP PFNGLNAMEDBUFFERSTORAGEPROC)(GLuint buffer, GLsizeiptr size, const void *data, GLbitfield flags);
+GLAPI PFNGLNAMEDBUFFERSTORAGEPROC glad_glNamedBufferStorage;
+#define glNamedBufferStorage glad_glNamedBufferStorage
+typedef void (APIENTRYP PFNGLNAMEDBUFFERDATAPROC)(GLuint buffer, GLsizeiptr size, const void *data, GLenum usage);
+GLAPI PFNGLNAMEDBUFFERDATAPROC glad_glNamedBufferData;
+#define glNamedBufferData glad_glNamedBufferData
+typedef void (APIENTRYP PFNGLNAMEDBUFFERSUBDATAPROC)(GLuint buffer, GLintptr offset, GLsizeiptr size, const void *data);
+GLAPI PFNGLNAMEDBUFFERSUBDATAPROC glad_glNamedBufferSubData;
+#define glNamedBufferSubData glad_glNamedBufferSubData
+typedef void (APIENTRYP PFNGLCOPYNAMEDBUFFERSUBDATAPROC)(GLuint readBuffer, GLuint writeBuffer, GLintptr readOffset, GLintptr writeOffset, GLsizeiptr size);
+GLAPI PFNGLCOPYNAMEDBUFFERSUBDATAPROC glad_glCopyNamedBufferSubData;
+#define glCopyNamedBufferSubData glad_glCopyNamedBufferSubData
+typedef void (APIENTRYP PFNGLCLEARNAMEDBUFFERDATAPROC)(GLuint buffer, GLenum internalformat, GLenum format, GLenum type, const void *data);
+GLAPI PFNGLCLEARNAMEDBUFFERDATAPROC glad_glClearNamedBufferData;
+#define glClearNamedBufferData glad_glClearNamedBufferData
+typedef void (APIENTRYP PFNGLCLEARNAMEDBUFFERSUBDATAPROC)(GLuint buffer, GLenum internalformat, GLintptr offset, GLsizeiptr size, GLenum format, GLenum type, const void *data);
+GLAPI PFNGLCLEARNAMEDBUFFERSUBDATAPROC glad_glClearNamedBufferSubData;
+#define glClearNamedBufferSubData glad_glClearNamedBufferSubData
+typedef void * (APIENTRYP PFNGLMAPNAMEDBUFFERPROC)(GLuint buffer, GLenum access);
+GLAPI PFNGLMAPNAMEDBUFFERPROC glad_glMapNamedBuffer;
+#define glMapNamedBuffer glad_glMapNamedBuffer
+typedef void * (APIENTRYP PFNGLMAPNAMEDBUFFERRANGEPROC)(GLuint buffer, GLintptr offset, GLsizeiptr length, GLbitfield access);
+GLAPI PFNGLMAPNAMEDBUFFERRANGEPROC glad_glMapNamedBufferRange;
+#define glMapNamedBufferRange glad_glMapNamedBufferRange
+typedef GLboolean (APIENTRYP PFNGLUNMAPNAMEDBUFFERPROC)(GLuint buffer);
+GLAPI PFNGLUNMAPNAMEDBUFFERPROC glad_glUnmapNamedBuffer;
+#define glUnmapNamedBuffer glad_glUnmapNamedBuffer
+typedef void (APIENTRYP PFNGLFLUSHMAPPEDNAMEDBUFFERRANGEPROC)(GLuint buffer, GLintptr offset, GLsizeiptr length);
+GLAPI PFNGLFLUSHMAPPEDNAMEDBUFFERRANGEPROC glad_glFlushMappedNamedBufferRange;
+#define glFlushMappedNamedBufferRange glad_glFlushMappedNamedBufferRange
+typedef void (APIENTRYP PFNGLGETNAMEDBUFFERPARAMETERIVPROC)(GLuint buffer, GLenum pname, GLint *params);
+GLAPI PFNGLGETNAMEDBUFFERPARAMETERIVPROC glad_glGetNamedBufferParameteriv;
+#define glGetNamedBufferParameteriv glad_glGetNamedBufferParameteriv
+typedef void (APIENTRYP PFNGLGETNAMEDBUFFERPARAMETERI64VPROC)(GLuint buffer, GLenum pname, GLint64 *params);
+GLAPI PFNGLGETNAMEDBUFFERPARAMETERI64VPROC glad_glGetNamedBufferParameteri64v;
+#define glGetNamedBufferParameteri64v glad_glGetNamedBufferParameteri64v
+typedef void (APIENTRYP PFNGLGETNAMEDBUFFERPOINTERVPROC)(GLuint buffer, GLenum pname, void **params);
+GLAPI PFNGLGETNAMEDBUFFERPOINTERVPROC glad_glGetNamedBufferPointerv;
+#define glGetNamedBufferPointerv glad_glGetNamedBufferPointerv
+typedef void (APIENTRYP PFNGLGETNAMEDBUFFERSUBDATAPROC)(GLuint buffer, GLintptr offset, GLsizeiptr size, void *data);
+GLAPI PFNGLGETNAMEDBUFFERSUBDATAPROC glad_glGetNamedBufferSubData;
+#define glGetNamedBufferSubData glad_glGetNamedBufferSubData
+typedef void (APIENTRYP PFNGLCREATEFRAMEBUFFERSPROC)(GLsizei n, GLuint *framebuffers);
+GLAPI PFNGLCREATEFRAMEBUFFERSPROC glad_glCreateFramebuffers;
+#define glCreateFramebuffers glad_glCreateFramebuffers
+typedef void (APIENTRYP PFNGLNAMEDFRAMEBUFFERRENDERBUFFERPROC)(GLuint framebuffer, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
+GLAPI PFNGLNAMEDFRAMEBUFFERRENDERBUFFERPROC glad_glNamedFramebufferRenderbuffer;
+#define glNamedFramebufferRenderbuffer glad_glNamedFramebufferRenderbuffer
+typedef void (APIENTRYP PFNGLNAMEDFRAMEBUFFERPARAMETERIPROC)(GLuint framebuffer, GLenum pname, GLint param);
+GLAPI PFNGLNAMEDFRAMEBUFFERPARAMETERIPROC glad_glNamedFramebufferParameteri;
+#define glNamedFramebufferParameteri glad_glNamedFramebufferParameteri
+typedef void (APIENTRYP PFNGLNAMEDFRAMEBUFFERTEXTUREPROC)(GLuint framebuffer, GLenum attachment, GLuint texture, GLint level);
+GLAPI PFNGLNAMEDFRAMEBUFFERTEXTUREPROC glad_glNamedFramebufferTexture;
+#define glNamedFramebufferTexture glad_glNamedFramebufferTexture
+typedef void (APIENTRYP PFNGLNAMEDFRAMEBUFFERTEXTURELAYERPROC)(GLuint framebuffer, GLenum attachment, GLuint texture, GLint level, GLint layer);
+GLAPI PFNGLNAMEDFRAMEBUFFERTEXTURELAYERPROC glad_glNamedFramebufferTextureLayer;
+#define glNamedFramebufferTextureLayer glad_glNamedFramebufferTextureLayer
+typedef void (APIENTRYP PFNGLNAMEDFRAMEBUFFERDRAWBUFFERPROC)(GLuint framebuffer, GLenum buf);
+GLAPI PFNGLNAMEDFRAMEBUFFERDRAWBUFFERPROC glad_glNamedFramebufferDrawBuffer;
+#define glNamedFramebufferDrawBuffer glad_glNamedFramebufferDrawBuffer
+typedef void (APIENTRYP PFNGLNAMEDFRAMEBUFFERDRAWBUFFERSPROC)(GLuint framebuffer, GLsizei n, const GLenum *bufs);
+GLAPI PFNGLNAMEDFRAMEBUFFERDRAWBUFFERSPROC glad_glNamedFramebufferDrawBuffers;
+#define glNamedFramebufferDrawBuffers glad_glNamedFramebufferDrawBuffers
+typedef void (APIENTRYP PFNGLNAMEDFRAMEBUFFERREADBUFFERPROC)(GLuint framebuffer, GLenum src);
+GLAPI PFNGLNAMEDFRAMEBUFFERREADBUFFERPROC glad_glNamedFramebufferReadBuffer;
+#define glNamedFramebufferReadBuffer glad_glNamedFramebufferReadBuffer
+typedef void (APIENTRYP PFNGLINVALIDATENAMEDFRAMEBUFFERDATAPROC)(GLuint framebuffer, GLsizei numAttachments, const GLenum *attachments);
+GLAPI PFNGLINVALIDATENAMEDFRAMEBUFFERDATAPROC glad_glInvalidateNamedFramebufferData;
+#define glInvalidateNamedFramebufferData glad_glInvalidateNamedFramebufferData
+typedef void (APIENTRYP PFNGLINVALIDATENAMEDFRAMEBUFFERSUBDATAPROC)(GLuint framebuffer, GLsizei numAttachments, const GLenum *attachments, GLint x, GLint y, GLsizei width, GLsizei height);
+GLAPI PFNGLINVALIDATENAMEDFRAMEBUFFERSUBDATAPROC glad_glInvalidateNamedFramebufferSubData;
+#define glInvalidateNamedFramebufferSubData glad_glInvalidateNamedFramebufferSubData
+typedef void (APIENTRYP PFNGLCLEARNAMEDFRAMEBUFFERIVPROC)(GLuint framebuffer, GLenum buffer, GLint drawbuffer, const GLint *value);
+GLAPI PFNGLCLEARNAMEDFRAMEBUFFERIVPROC glad_glClearNamedFramebufferiv;
+#define glClearNamedFramebufferiv glad_glClearNamedFramebufferiv
+typedef void (APIENTRYP PFNGLCLEARNAMEDFRAMEBUFFERUIVPROC)(GLuint framebuffer, GLenum buffer, GLint drawbuffer, const GLuint *value);
+GLAPI PFNGLCLEARNAMEDFRAMEBUFFERUIVPROC glad_glClearNamedFramebufferuiv;
+#define glClearNamedFramebufferuiv glad_glClearNamedFramebufferuiv
+typedef void (APIENTRYP PFNGLCLEARNAMEDFRAMEBUFFERFVPROC)(GLuint framebuffer, GLenum buffer, GLint drawbuffer, const GLfloat *value);
+GLAPI PFNGLCLEARNAMEDFRAMEBUFFERFVPROC glad_glClearNamedFramebufferfv;
+#define glClearNamedFramebufferfv glad_glClearNamedFramebufferfv
+typedef void (APIENTRYP PFNGLCLEARNAMEDFRAMEBUFFERFIPROC)(GLuint framebuffer, GLenum buffer, GLint drawbuffer, GLfloat depth, GLint stencil);
+GLAPI PFNGLCLEARNAMEDFRAMEBUFFERFIPROC glad_glClearNamedFramebufferfi;
+#define glClearNamedFramebufferfi glad_glClearNamedFramebufferfi
+typedef void (APIENTRYP PFNGLBLITNAMEDFRAMEBUFFERPROC)(GLuint readFramebuffer, GLuint drawFramebuffer, GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter);
+GLAPI PFNGLBLITNAMEDFRAMEBUFFERPROC glad_glBlitNamedFramebuffer;
+#define glBlitNamedFramebuffer glad_glBlitNamedFramebuffer
+typedef GLenum (APIENTRYP PFNGLCHECKNAMEDFRAMEBUFFERSTATUSPROC)(GLuint framebuffer, GLenum target);
+GLAPI PFNGLCHECKNAMEDFRAMEBUFFERSTATUSPROC glad_glCheckNamedFramebufferStatus;
+#define glCheckNamedFramebufferStatus glad_glCheckNamedFramebufferStatus
+typedef void (APIENTRYP PFNGLGETNAMEDFRAMEBUFFERPARAMETERIVPROC)(GLuint framebuffer, GLenum pname, GLint *param);
+GLAPI PFNGLGETNAMEDFRAMEBUFFERPARAMETERIVPROC glad_glGetNamedFramebufferParameteriv;
+#define glGetNamedFramebufferParameteriv glad_glGetNamedFramebufferParameteriv
+typedef void (APIENTRYP PFNGLGETNAMEDFRAMEBUFFERATTACHMENTPARAMETERIVPROC)(GLuint framebuffer, GLenum attachment, GLenum pname, GLint *params);
+GLAPI PFNGLGETNAMEDFRAMEBUFFERATTACHMENTPARAMETERIVPROC glad_glGetNamedFramebufferAttachmentParameteriv;
+#define glGetNamedFramebufferAttachmentParameteriv glad_glGetNamedFramebufferAttachmentParameteriv
+typedef void (APIENTRYP PFNGLCREATERENDERBUFFERSPROC)(GLsizei n, GLuint *renderbuffers);
+GLAPI PFNGLCREATERENDERBUFFERSPROC glad_glCreateRenderbuffers;
+#define glCreateRenderbuffers glad_glCreateRenderbuffers
+typedef void (APIENTRYP PFNGLNAMEDRENDERBUFFERSTORAGEPROC)(GLuint renderbuffer, GLenum internalformat, GLsizei width, GLsizei height);
+GLAPI PFNGLNAMEDRENDERBUFFERSTORAGEPROC glad_glNamedRenderbufferStorage;
+#define glNamedRenderbufferStorage glad_glNamedRenderbufferStorage
+typedef void (APIENTRYP PFNGLNAMEDRENDERBUFFERSTORAGEMULTISAMPLEPROC)(GLuint renderbuffer, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height);
+GLAPI PFNGLNAMEDRENDERBUFFERSTORAGEMULTISAMPLEPROC glad_glNamedRenderbufferStorageMultisample;
+#define glNamedRenderbufferStorageMultisample glad_glNamedRenderbufferStorageMultisample
+typedef void (APIENTRYP PFNGLGETNAMEDRENDERBUFFERPARAMETERIVPROC)(GLuint renderbuffer, GLenum pname, GLint *params);
+GLAPI PFNGLGETNAMEDRENDERBUFFERPARAMETERIVPROC glad_glGetNamedRenderbufferParameteriv;
+#define glGetNamedRenderbufferParameteriv glad_glGetNamedRenderbufferParameteriv
+typedef void (APIENTRYP PFNGLCREATETEXTURESPROC)(GLenum target, GLsizei n, GLuint *textures);
+GLAPI PFNGLCREATETEXTURESPROC glad_glCreateTextures;
+#define glCreateTextures glad_glCreateTextures
+typedef void (APIENTRYP PFNGLTEXTUREBUFFERPROC)(GLuint texture, GLenum internalformat, GLuint buffer);
+GLAPI PFNGLTEXTUREBUFFERPROC glad_glTextureBuffer;
+#define glTextureBuffer glad_glTextureBuffer
+typedef void (APIENTRYP PFNGLTEXTUREBUFFERRANGEPROC)(GLuint texture, GLenum internalformat, GLuint buffer, GLintptr offset, GLsizeiptr size);
+GLAPI PFNGLTEXTUREBUFFERRANGEPROC glad_glTextureBufferRange;
+#define glTextureBufferRange glad_glTextureBufferRange
+typedef void (APIENTRYP PFNGLTEXTURESTORAGE1DPROC)(GLuint texture, GLsizei levels, GLenum internalformat, GLsizei width);
+GLAPI PFNGLTEXTURESTORAGE1DPROC glad_glTextureStorage1D;
+#define glTextureStorage1D glad_glTextureStorage1D
+typedef void (APIENTRYP PFNGLTEXTURESTORAGE2DPROC)(GLuint texture, GLsizei levels, GLenum internalformat, GLsizei width, GLsizei height);
+GLAPI PFNGLTEXTURESTORAGE2DPROC glad_glTextureStorage2D;
+#define glTextureStorage2D glad_glTextureStorage2D
+typedef void (APIENTRYP PFNGLTEXTURESTORAGE3DPROC)(GLuint texture, GLsizei levels, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth);
+GLAPI PFNGLTEXTURESTORAGE3DPROC glad_glTextureStorage3D;
+#define glTextureStorage3D glad_glTextureStorage3D
+typedef void (APIENTRYP PFNGLTEXTURESTORAGE2DMULTISAMPLEPROC)(GLuint texture, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height, GLboolean fixedsamplelocations);
+GLAPI PFNGLTEXTURESTORAGE2DMULTISAMPLEPROC glad_glTextureStorage2DMultisample;
+#define glTextureStorage2DMultisample glad_glTextureStorage2DMultisample
+typedef void (APIENTRYP PFNGLTEXTURESTORAGE3DMULTISAMPLEPROC)(GLuint texture, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLboolean fixedsamplelocations);
+GLAPI PFNGLTEXTURESTORAGE3DMULTISAMPLEPROC glad_glTextureStorage3DMultisample;
+#define glTextureStorage3DMultisample glad_glTextureStorage3DMultisample
+typedef void (APIENTRYP PFNGLTEXTURESUBIMAGE1DPROC)(GLuint texture, GLint level, GLint xoffset, GLsizei width, GLenum format, GLenum type, const void *pixels);
+GLAPI PFNGLTEXTURESUBIMAGE1DPROC glad_glTextureSubImage1D;
+#define glTextureSubImage1D glad_glTextureSubImage1D
+typedef void (APIENTRYP PFNGLTEXTURESUBIMAGE2DPROC)(GLuint texture, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const void *pixels);
+GLAPI PFNGLTEXTURESUBIMAGE2DPROC glad_glTextureSubImage2D;
+#define glTextureSubImage2D glad_glTextureSubImage2D
+typedef void (APIENTRYP PFNGLTEXTURESUBIMAGE3DPROC)(GLuint texture, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const void *pixels);
+GLAPI PFNGLTEXTURESUBIMAGE3DPROC glad_glTextureSubImage3D;
+#define glTextureSubImage3D glad_glTextureSubImage3D
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXTURESUBIMAGE1DPROC)(GLuint texture, GLint level, GLint xoffset, GLsizei width, GLenum format, GLsizei imageSize, const void *data);
+GLAPI PFNGLCOMPRESSEDTEXTURESUBIMAGE1DPROC glad_glCompressedTextureSubImage1D;
+#define glCompressedTextureSubImage1D glad_glCompressedTextureSubImage1D
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXTURESUBIMAGE2DPROC)(GLuint texture, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const void *data);
+GLAPI PFNGLCOMPRESSEDTEXTURESUBIMAGE2DPROC glad_glCompressedTextureSubImage2D;
+#define glCompressedTextureSubImage2D glad_glCompressedTextureSubImage2D
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXTURESUBIMAGE3DPROC)(GLuint texture, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const void *data);
+GLAPI PFNGLCOMPRESSEDTEXTURESUBIMAGE3DPROC glad_glCompressedTextureSubImage3D;
+#define glCompressedTextureSubImage3D glad_glCompressedTextureSubImage3D
+typedef void (APIENTRYP PFNGLCOPYTEXTURESUBIMAGE1DPROC)(GLuint texture, GLint level, GLint xoffset, GLint x, GLint y, GLsizei width);
+GLAPI PFNGLCOPYTEXTURESUBIMAGE1DPROC glad_glCopyTextureSubImage1D;
+#define glCopyTextureSubImage1D glad_glCopyTextureSubImage1D
+typedef void (APIENTRYP PFNGLCOPYTEXTURESUBIMAGE2DPROC)(GLuint texture, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
+GLAPI PFNGLCOPYTEXTURESUBIMAGE2DPROC glad_glCopyTextureSubImage2D;
+#define glCopyTextureSubImage2D glad_glCopyTextureSubImage2D
+typedef void (APIENTRYP PFNGLCOPYTEXTURESUBIMAGE3DPROC)(GLuint texture, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height);
+GLAPI PFNGLCOPYTEXTURESUBIMAGE3DPROC glad_glCopyTextureSubImage3D;
+#define glCopyTextureSubImage3D glad_glCopyTextureSubImage3D
+typedef void (APIENTRYP PFNGLTEXTUREPARAMETERFPROC)(GLuint texture, GLenum pname, GLfloat param);
+GLAPI PFNGLTEXTUREPARAMETERFPROC glad_glTextureParameterf;
+#define glTextureParameterf glad_glTextureParameterf
+typedef void (APIENTRYP PFNGLTEXTUREPARAMETERFVPROC)(GLuint texture, GLenum pname, const GLfloat *param);
+GLAPI PFNGLTEXTUREPARAMETERFVPROC glad_glTextureParameterfv;
+#define glTextureParameterfv glad_glTextureParameterfv
+typedef void (APIENTRYP PFNGLTEXTUREPARAMETERIPROC)(GLuint texture, GLenum pname, GLint param);
+GLAPI PFNGLTEXTUREPARAMETERIPROC glad_glTextureParameteri;
+#define glTextureParameteri glad_glTextureParameteri
+typedef void (APIENTRYP PFNGLTEXTUREPARAMETERIIVPROC)(GLuint texture, GLenum pname, const GLint *params);
+GLAPI PFNGLTEXTUREPARAMETERIIVPROC glad_glTextureParameterIiv;
+#define glTextureParameterIiv glad_glTextureParameterIiv
+typedef void (APIENTRYP PFNGLTEXTUREPARAMETERIUIVPROC)(GLuint texture, GLenum pname, const GLuint *params);
+GLAPI PFNGLTEXTUREPARAMETERIUIVPROC glad_glTextureParameterIuiv;
+#define glTextureParameterIuiv glad_glTextureParameterIuiv
+typedef void (APIENTRYP PFNGLTEXTUREPARAMETERIVPROC)(GLuint texture, GLenum pname, const GLint *param);
+GLAPI PFNGLTEXTUREPARAMETERIVPROC glad_glTextureParameteriv;
+#define glTextureParameteriv glad_glTextureParameteriv
+typedef void (APIENTRYP PFNGLGENERATETEXTUREMIPMAPPROC)(GLuint texture);
+GLAPI PFNGLGENERATETEXTUREMIPMAPPROC glad_glGenerateTextureMipmap;
+#define glGenerateTextureMipmap glad_glGenerateTextureMipmap
+typedef void (APIENTRYP PFNGLBINDTEXTUREUNITPROC)(GLuint unit, GLuint texture);
+GLAPI PFNGLBINDTEXTUREUNITPROC glad_glBindTextureUnit;
+#define glBindTextureUnit glad_glBindTextureUnit
+typedef void (APIENTRYP PFNGLGETTEXTUREIMAGEPROC)(GLuint texture, GLint level, GLenum format, GLenum type, GLsizei bufSize, void *pixels);
+GLAPI PFNGLGETTEXTUREIMAGEPROC glad_glGetTextureImage;
+#define glGetTextureImage glad_glGetTextureImage
+typedef void (APIENTRYP PFNGLGETCOMPRESSEDTEXTUREIMAGEPROC)(GLuint texture, GLint level, GLsizei bufSize, void *pixels);
+GLAPI PFNGLGETCOMPRESSEDTEXTUREIMAGEPROC glad_glGetCompressedTextureImage;
+#define glGetCompressedTextureImage glad_glGetCompressedTextureImage
+typedef void (APIENTRYP PFNGLGETTEXTURELEVELPARAMETERFVPROC)(GLuint texture, GLint level, GLenum pname, GLfloat *params);
+GLAPI PFNGLGETTEXTURELEVELPARAMETERFVPROC glad_glGetTextureLevelParameterfv;
+#define glGetTextureLevelParameterfv glad_glGetTextureLevelParameterfv
+typedef void (APIENTRYP PFNGLGETTEXTURELEVELPARAMETERIVPROC)(GLuint texture, GLint level, GLenum pname, GLint *params);
+GLAPI PFNGLGETTEXTURELEVELPARAMETERIVPROC glad_glGetTextureLevelParameteriv;
+#define glGetTextureLevelParameteriv glad_glGetTextureLevelParameteriv
+typedef void (APIENTRYP PFNGLGETTEXTUREPARAMETERFVPROC)(GLuint texture, GLenum pname, GLfloat *params);
+GLAPI PFNGLGETTEXTUREPARAMETERFVPROC glad_glGetTextureParameterfv;
+#define glGetTextureParameterfv glad_glGetTextureParameterfv
+typedef void (APIENTRYP PFNGLGETTEXTUREPARAMETERIIVPROC)(GLuint texture, GLenum pname, GLint *params);
+GLAPI PFNGLGETTEXTUREPARAMETERIIVPROC glad_glGetTextureParameterIiv;
+#define glGetTextureParameterIiv glad_glGetTextureParameterIiv
+typedef void (APIENTRYP PFNGLGETTEXTUREPARAMETERIUIVPROC)(GLuint texture, GLenum pname, GLuint *params);
+GLAPI PFNGLGETTEXTUREPARAMETERIUIVPROC glad_glGetTextureParameterIuiv;
+#define glGetTextureParameterIuiv glad_glGetTextureParameterIuiv
+typedef void (APIENTRYP PFNGLGETTEXTUREPARAMETERIVPROC)(GLuint texture, GLenum pname, GLint *params);
+GLAPI PFNGLGETTEXTUREPARAMETERIVPROC glad_glGetTextureParameteriv;
+#define glGetTextureParameteriv glad_glGetTextureParameteriv
+typedef void (APIENTRYP PFNGLCREATEVERTEXARRAYSPROC)(GLsizei n, GLuint *arrays);
+GLAPI PFNGLCREATEVERTEXARRAYSPROC glad_glCreateVertexArrays;
+#define glCreateVertexArrays glad_glCreateVertexArrays
+typedef void (APIENTRYP PFNGLDISABLEVERTEXARRAYATTRIBPROC)(GLuint vaobj, GLuint index);
+GLAPI PFNGLDISABLEVERTEXARRAYATTRIBPROC glad_glDisableVertexArrayAttrib;
+#define glDisableVertexArrayAttrib glad_glDisableVertexArrayAttrib
+typedef void (APIENTRYP PFNGLENABLEVERTEXARRAYATTRIBPROC)(GLuint vaobj, GLuint index);
+GLAPI PFNGLENABLEVERTEXARRAYATTRIBPROC glad_glEnableVertexArrayAttrib;
+#define glEnableVertexArrayAttrib glad_glEnableVertexArrayAttrib
+typedef void (APIENTRYP PFNGLVERTEXARRAYELEMENTBUFFERPROC)(GLuint vaobj, GLuint buffer);
+GLAPI PFNGLVERTEXARRAYELEMENTBUFFERPROC glad_glVertexArrayElementBuffer;
+#define glVertexArrayElementBuffer glad_glVertexArrayElementBuffer
+typedef void (APIENTRYP PFNGLVERTEXARRAYVERTEXBUFFERPROC)(GLuint vaobj, GLuint bindingindex, GLuint buffer, GLintptr offset, GLsizei stride);
+GLAPI PFNGLVERTEXARRAYVERTEXBUFFERPROC glad_glVertexArrayVertexBuffer;
+#define glVertexArrayVertexBuffer glad_glVertexArrayVertexBuffer
+typedef void (APIENTRYP PFNGLVERTEXARRAYVERTEXBUFFERSPROC)(GLuint vaobj, GLuint first, GLsizei count, const GLuint *buffers, const GLintptr *offsets, const GLsizei *strides);
+GLAPI PFNGLVERTEXARRAYVERTEXBUFFERSPROC glad_glVertexArrayVertexBuffers;
+#define glVertexArrayVertexBuffers glad_glVertexArrayVertexBuffers
+typedef void (APIENTRYP PFNGLVERTEXARRAYATTRIBBINDINGPROC)(GLuint vaobj, GLuint attribindex, GLuint bindingindex);
+GLAPI PFNGLVERTEXARRAYATTRIBBINDINGPROC glad_glVertexArrayAttribBinding;
+#define glVertexArrayAttribBinding glad_glVertexArrayAttribBinding
+typedef void (APIENTRYP PFNGLVERTEXARRAYATTRIBFORMATPROC)(GLuint vaobj, GLuint attribindex, GLint size, GLenum type, GLboolean normalized, GLuint relativeoffset);
+GLAPI PFNGLVERTEXARRAYATTRIBFORMATPROC glad_glVertexArrayAttribFormat;
+#define glVertexArrayAttribFormat glad_glVertexArrayAttribFormat
+typedef void (APIENTRYP PFNGLVERTEXARRAYATTRIBIFORMATPROC)(GLuint vaobj, GLuint attribindex, GLint size, GLenum type, GLuint relativeoffset);
+GLAPI PFNGLVERTEXARRAYATTRIBIFORMATPROC glad_glVertexArrayAttribIFormat;
+#define glVertexArrayAttribIFormat glad_glVertexArrayAttribIFormat
+typedef void (APIENTRYP PFNGLVERTEXARRAYATTRIBLFORMATPROC)(GLuint vaobj, GLuint attribindex, GLint size, GLenum type, GLuint relativeoffset);
+GLAPI PFNGLVERTEXARRAYATTRIBLFORMATPROC glad_glVertexArrayAttribLFormat;
+#define glVertexArrayAttribLFormat glad_glVertexArrayAttribLFormat
+typedef void (APIENTRYP PFNGLVERTEXARRAYBINDINGDIVISORPROC)(GLuint vaobj, GLuint bindingindex, GLuint divisor);
+GLAPI PFNGLVERTEXARRAYBINDINGDIVISORPROC glad_glVertexArrayBindingDivisor;
+#define glVertexArrayBindingDivisor glad_glVertexArrayBindingDivisor
+typedef void (APIENTRYP PFNGLGETVERTEXARRAYIVPROC)(GLuint vaobj, GLenum pname, GLint *param);
+GLAPI PFNGLGETVERTEXARRAYIVPROC glad_glGetVertexArrayiv;
+#define glGetVertexArrayiv glad_glGetVertexArrayiv
+typedef void (APIENTRYP PFNGLGETVERTEXARRAYINDEXEDIVPROC)(GLuint vaobj, GLuint index, GLenum pname, GLint *param);
+GLAPI PFNGLGETVERTEXARRAYINDEXEDIVPROC glad_glGetVertexArrayIndexediv;
+#define glGetVertexArrayIndexediv glad_glGetVertexArrayIndexediv
+typedef void (APIENTRYP PFNGLGETVERTEXARRAYINDEXED64IVPROC)(GLuint vaobj, GLuint index, GLenum pname, GLint64 *param);
+GLAPI PFNGLGETVERTEXARRAYINDEXED64IVPROC glad_glGetVertexArrayIndexed64iv;
+#define glGetVertexArrayIndexed64iv glad_glGetVertexArrayIndexed64iv
+typedef void (APIENTRYP PFNGLCREATESAMPLERSPROC)(GLsizei n, GLuint *samplers);
+GLAPI PFNGLCREATESAMPLERSPROC glad_glCreateSamplers;
+#define glCreateSamplers glad_glCreateSamplers
+typedef void (APIENTRYP PFNGLCREATEPROGRAMPIPELINESPROC)(GLsizei n, GLuint *pipelines);
+GLAPI PFNGLCREATEPROGRAMPIPELINESPROC glad_glCreateProgramPipelines;
+#define glCreateProgramPipelines glad_glCreateProgramPipelines
+typedef void (APIENTRYP PFNGLCREATEQUERIESPROC)(GLenum target, GLsizei n, GLuint *ids);
+GLAPI PFNGLCREATEQUERIESPROC glad_glCreateQueries;
+#define glCreateQueries glad_glCreateQueries
+typedef void (APIENTRYP PFNGLGETQUERYBUFFEROBJECTI64VPROC)(GLuint id, GLuint buffer, GLenum pname, GLintptr offset);
+GLAPI PFNGLGETQUERYBUFFEROBJECTI64VPROC glad_glGetQueryBufferObjecti64v;
+#define glGetQueryBufferObjecti64v glad_glGetQueryBufferObjecti64v
+typedef void (APIENTRYP PFNGLGETQUERYBUFFEROBJECTIVPROC)(GLuint id, GLuint buffer, GLenum pname, GLintptr offset);
+GLAPI PFNGLGETQUERYBUFFEROBJECTIVPROC glad_glGetQueryBufferObjectiv;
+#define glGetQueryBufferObjectiv glad_glGetQueryBufferObjectiv
+typedef void (APIENTRYP PFNGLGETQUERYBUFFEROBJECTUI64VPROC)(GLuint id, GLuint buffer, GLenum pname, GLintptr offset);
+GLAPI PFNGLGETQUERYBUFFEROBJECTUI64VPROC glad_glGetQueryBufferObjectui64v;
+#define glGetQueryBufferObjectui64v glad_glGetQueryBufferObjectui64v
+typedef void (APIENTRYP PFNGLGETQUERYBUFFEROBJECTUIVPROC)(GLuint id, GLuint buffer, GLenum pname, GLintptr offset);
+GLAPI PFNGLGETQUERYBUFFEROBJECTUIVPROC glad_glGetQueryBufferObjectuiv;
+#define glGetQueryBufferObjectuiv glad_glGetQueryBufferObjectuiv
+typedef void (APIENTRYP PFNGLMEMORYBARRIERBYREGIONPROC)(GLbitfield barriers);
+GLAPI PFNGLMEMORYBARRIERBYREGIONPROC glad_glMemoryBarrierByRegion;
+#define glMemoryBarrierByRegion glad_glMemoryBarrierByRegion
+typedef void (APIENTRYP PFNGLGETTEXTURESUBIMAGEPROC)(GLuint texture, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, GLsizei bufSize, void *pixels);
+GLAPI PFNGLGETTEXTURESUBIMAGEPROC glad_glGetTextureSubImage;
+#define glGetTextureSubImage glad_glGetTextureSubImage
+typedef void (APIENTRYP PFNGLGETCOMPRESSEDTEXTURESUBIMAGEPROC)(GLuint texture, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLsizei bufSize, void *pixels);
+GLAPI PFNGLGETCOMPRESSEDTEXTURESUBIMAGEPROC glad_glGetCompressedTextureSubImage;
+#define glGetCompressedTextureSubImage glad_glGetCompressedTextureSubImage
+typedef GLenum (APIENTRYP PFNGLGETGRAPHICSRESETSTATUSPROC)(void);
+GLAPI PFNGLGETGRAPHICSRESETSTATUSPROC glad_glGetGraphicsResetStatus;
+#define glGetGraphicsResetStatus glad_glGetGraphicsResetStatus
+typedef void (APIENTRYP PFNGLGETNCOMPRESSEDTEXIMAGEPROC)(GLenum target, GLint lod, GLsizei bufSize, void *pixels);
+GLAPI PFNGLGETNCOMPRESSEDTEXIMAGEPROC glad_glGetnCompressedTexImage;
+#define glGetnCompressedTexImage glad_glGetnCompressedTexImage
+typedef void (APIENTRYP PFNGLGETNTEXIMAGEPROC)(GLenum target, GLint level, GLenum format, GLenum type, GLsizei bufSize, void *pixels);
+GLAPI PFNGLGETNTEXIMAGEPROC glad_glGetnTexImage;
+#define glGetnTexImage glad_glGetnTexImage
+typedef void (APIENTRYP PFNGLGETNUNIFORMDVPROC)(GLuint program, GLint location, GLsizei bufSize, GLdouble *params);
+GLAPI PFNGLGETNUNIFORMDVPROC glad_glGetnUniformdv;
+#define glGetnUniformdv glad_glGetnUniformdv
+typedef void (APIENTRYP PFNGLGETNUNIFORMFVPROC)(GLuint program, GLint location, GLsizei bufSize, GLfloat *params);
+GLAPI PFNGLGETNUNIFORMFVPROC glad_glGetnUniformfv;
+#define glGetnUniformfv glad_glGetnUniformfv
+typedef void (APIENTRYP PFNGLGETNUNIFORMIVPROC)(GLuint program, GLint location, GLsizei bufSize, GLint *params);
+GLAPI PFNGLGETNUNIFORMIVPROC glad_glGetnUniformiv;
+#define glGetnUniformiv glad_glGetnUniformiv
+typedef void (APIENTRYP PFNGLGETNUNIFORMUIVPROC)(GLuint program, GLint location, GLsizei bufSize, GLuint *params);
+GLAPI PFNGLGETNUNIFORMUIVPROC glad_glGetnUniformuiv;
+#define glGetnUniformuiv glad_glGetnUniformuiv
+typedef void (APIENTRYP PFNGLREADNPIXELSPROC)(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLsizei bufSize, void *data);
+GLAPI PFNGLREADNPIXELSPROC glad_glReadnPixels;
+#define glReadnPixels glad_glReadnPixels
+typedef void (APIENTRYP PFNGLGETNMAPDVPROC)(GLenum target, GLenum query, GLsizei bufSize, GLdouble *v);
+GLAPI PFNGLGETNMAPDVPROC glad_glGetnMapdv;
+#define glGetnMapdv glad_glGetnMapdv
+typedef void (APIENTRYP PFNGLGETNMAPFVPROC)(GLenum target, GLenum query, GLsizei bufSize, GLfloat *v);
+GLAPI PFNGLGETNMAPFVPROC glad_glGetnMapfv;
+#define glGetnMapfv glad_glGetnMapfv
+typedef void (APIENTRYP PFNGLGETNMAPIVPROC)(GLenum target, GLenum query, GLsizei bufSize, GLint *v);
+GLAPI PFNGLGETNMAPIVPROC glad_glGetnMapiv;
+#define glGetnMapiv glad_glGetnMapiv
+typedef void (APIENTRYP PFNGLGETNPIXELMAPFVPROC)(GLenum map, GLsizei bufSize, GLfloat *values);
+GLAPI PFNGLGETNPIXELMAPFVPROC glad_glGetnPixelMapfv;
+#define glGetnPixelMapfv glad_glGetnPixelMapfv
+typedef void (APIENTRYP PFNGLGETNPIXELMAPUIVPROC)(GLenum map, GLsizei bufSize, GLuint *values);
+GLAPI PFNGLGETNPIXELMAPUIVPROC glad_glGetnPixelMapuiv;
+#define glGetnPixelMapuiv glad_glGetnPixelMapuiv
+typedef void (APIENTRYP PFNGLGETNPIXELMAPUSVPROC)(GLenum map, GLsizei bufSize, GLushort *values);
+GLAPI PFNGLGETNPIXELMAPUSVPROC glad_glGetnPixelMapusv;
+#define glGetnPixelMapusv glad_glGetnPixelMapusv
+typedef void (APIENTRYP PFNGLGETNPOLYGONSTIPPLEPROC)(GLsizei bufSize, GLubyte *pattern);
+GLAPI PFNGLGETNPOLYGONSTIPPLEPROC glad_glGetnPolygonStipple;
+#define glGetnPolygonStipple glad_glGetnPolygonStipple
+typedef void (APIENTRYP PFNGLGETNCOLORTABLEPROC)(GLenum target, GLenum format, GLenum type, GLsizei bufSize, void *table);
+GLAPI PFNGLGETNCOLORTABLEPROC glad_glGetnColorTable;
+#define glGetnColorTable glad_glGetnColorTable
+typedef void (APIENTRYP PFNGLGETNCONVOLUTIONFILTERPROC)(GLenum target, GLenum format, GLenum type, GLsizei bufSize, void *image);
+GLAPI PFNGLGETNCONVOLUTIONFILTERPROC glad_glGetnConvolutionFilter;
+#define glGetnConvolutionFilter glad_glGetnConvolutionFilter
+typedef void (APIENTRYP PFNGLGETNSEPARABLEFILTERPROC)(GLenum target, GLenum format, GLenum type, GLsizei rowBufSize, void *row, GLsizei columnBufSize, void *column, void *span);
+GLAPI PFNGLGETNSEPARABLEFILTERPROC glad_glGetnSeparableFilter;
+#define glGetnSeparableFilter glad_glGetnSeparableFilter
+typedef void (APIENTRYP PFNGLGETNHISTOGRAMPROC)(GLenum target, GLboolean reset, GLenum format, GLenum type, GLsizei bufSize, void *values);
+GLAPI PFNGLGETNHISTOGRAMPROC glad_glGetnHistogram;
+#define glGetnHistogram glad_glGetnHistogram
+typedef void (APIENTRYP PFNGLGETNMINMAXPROC)(GLenum target, GLboolean reset, GLenum format, GLenum type, GLsizei bufSize, void *values);
+GLAPI PFNGLGETNMINMAXPROC glad_glGetnMinmax;
+#define glGetnMinmax glad_glGetnMinmax
+typedef void (APIENTRYP PFNGLTEXTUREBARRIERPROC)(void);
+GLAPI PFNGLTEXTUREBARRIERPROC glad_glTextureBarrier;
+#define glTextureBarrier glad_glTextureBarrier
+#endif
+#ifndef GL_VERSION_4_6
+#define GL_VERSION_4_6 1
+GLAPI int GLAD_GL_VERSION_4_6;
+typedef void (APIENTRYP PFNGLSPECIALIZESHADERPROC)(GLuint shader, const GLchar *pEntryPoint, GLuint numSpecializationConstants, const GLuint *pConstantIndex, const GLuint *pConstantValue);
+GLAPI PFNGLSPECIALIZESHADERPROC glad_glSpecializeShader;
+#define glSpecializeShader glad_glSpecializeShader
+typedef void (APIENTRYP PFNGLMULTIDRAWARRAYSINDIRECTCOUNTPROC)(GLenum mode, const void *indirect, GLintptr drawcount, GLsizei maxdrawcount, GLsizei stride);
+GLAPI PFNGLMULTIDRAWARRAYSINDIRECTCOUNTPROC glad_glMultiDrawArraysIndirectCount;
+#define glMultiDrawArraysIndirectCount glad_glMultiDrawArraysIndirectCount
+typedef void (APIENTRYP PFNGLMULTIDRAWELEMENTSINDIRECTCOUNTPROC)(GLenum mode, GLenum type, const void *indirect, GLintptr drawcount, GLsizei maxdrawcount, GLsizei stride);
+GLAPI PFNGLMULTIDRAWELEMENTSINDIRECTCOUNTPROC glad_glMultiDrawElementsIndirectCount;
+#define glMultiDrawElementsIndirectCount glad_glMultiDrawElementsIndirectCount
+typedef void (APIENTRYP PFNGLPOLYGONOFFSETCLAMPPROC)(GLfloat factor, GLfloat units, GLfloat clamp);
+GLAPI PFNGLPOLYGONOFFSETCLAMPPROC glad_glPolygonOffsetClamp;
+#define glPolygonOffsetClamp glad_glPolygonOffsetClamp
+#endif
+#ifndef GL_ES_VERSION_2_0
+#define GL_ES_VERSION_2_0 1
+GLAPI int GLAD_GL_ES_VERSION_2_0;
+#endif
+#ifndef GL_ES_VERSION_3_0
+#define GL_ES_VERSION_3_0 1
+GLAPI int GLAD_GL_ES_VERSION_3_0;
+#endif
+#ifndef GL_ES_VERSION_3_1
+#define GL_ES_VERSION_3_1 1
+GLAPI int GLAD_GL_ES_VERSION_3_1;
+#endif
+#ifndef GL_ES_VERSION_3_2
+#define GL_ES_VERSION_3_2 1
+GLAPI int GLAD_GL_ES_VERSION_3_2;
+typedef void (APIENTRYP PFNGLBLENDBARRIERPROC)(void);
+GLAPI PFNGLBLENDBARRIERPROC glad_glBlendBarrier;
+#define glBlendBarrier glad_glBlendBarrier
+typedef void (APIENTRYP PFNGLPRIMITIVEBOUNDINGBOXPROC)(GLfloat minX, GLfloat minY, GLfloat minZ, GLfloat minW, GLfloat maxX, GLfloat maxY, GLfloat maxZ, GLfloat maxW);
+GLAPI PFNGLPRIMITIVEBOUNDINGBOXPROC glad_glPrimitiveBoundingBox;
+#define glPrimitiveBoundingBox glad_glPrimitiveBoundingBox
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/gfx/contrib/glad/src/glad.c b/gfx/contrib/glad/src/glad.c
new file mode 100644
index 0000000..4a3cf51
--- /dev/null
+++ b/gfx/contrib/glad/src/glad.c
@@ -0,0 +1,2277 @@
+/*
+
+    OpenGL, OpenGL ES loader generated by glad 0.1.33 on Sun Aug 30 00:22:38 2020.
+
+    Language/Generator: C/C++
+    Specification: gl
+    APIs: gl=4.6, gles2=3.2
+    Profile: core
+    Extensions:
+        
+    Loader: True
+    Local files: False
+    Omit khrplatform: False
+    Reproducible: False
+
+    Commandline:
+        --profile="core" --api="gl=4.6,gles2=3.2" --generator="c" --spec="gl" --extensions=""
+    Online:
+        https://glad.dav1d.de/#profile=core&language=c&specification=gl&loader=on&api=gl%3D4.6&api=gles2%3D3.2
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <glad/glad.h>
+
+static void* get_proc(const char *namez);
+
+#if defined(_WIN32) || defined(__CYGWIN__)
+#ifndef _WINDOWS_
+#undef APIENTRY
+#endif
+#include <windows.h>
+static HMODULE libGL;
+
+typedef void* (APIENTRYP PFNWGLGETPROCADDRESSPROC_PRIVATE)(const char*);
+static PFNWGLGETPROCADDRESSPROC_PRIVATE gladGetProcAddressPtr;
+
+#ifdef _MSC_VER
+#ifdef __has_include
+  #if __has_include(<winapifamily.h>)
+    #define HAVE_WINAPIFAMILY 1
+  #endif
+#elif _MSC_VER >= 1700 && !_USING_V110_SDK71_
+  #define HAVE_WINAPIFAMILY 1
+#endif
+#endif
+
+#ifdef HAVE_WINAPIFAMILY
+  #include <winapifamily.h>
+  #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) && WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
+    #define IS_UWP 1
+  #endif
+#endif
+
+static
+int open_gl(void) {
+#ifndef IS_UWP
+    libGL = LoadLibraryW(L"opengl32.dll");
+    if(libGL != NULL) {
+        void (* tmp)(void);
+        tmp = (void(*)(void)) GetProcAddress(libGL, "wglGetProcAddress");
+        gladGetProcAddressPtr = (PFNWGLGETPROCADDRESSPROC_PRIVATE) tmp;
+        return gladGetProcAddressPtr != NULL;
+    }
+#endif
+
+    return 0;
+}
+
+static
+void close_gl(void) {
+    if(libGL != NULL) {
+        FreeLibrary((HMODULE) libGL);
+        libGL = NULL;
+    }
+}
+#else
+#include <dlfcn.h>
+static void* libGL;
+
+#if !defined(__APPLE__) && !defined(__HAIKU__)
+typedef void* (APIENTRYP PFNGLXGETPROCADDRESSPROC_PRIVATE)(const char*);
+static PFNGLXGETPROCADDRESSPROC_PRIVATE gladGetProcAddressPtr;
+#endif
+
+static
+int open_gl(void) {
+#ifdef __APPLE__
+    static const char *NAMES[] = {
+        "../Frameworks/OpenGL.framework/OpenGL",
+        "/Library/Frameworks/OpenGL.framework/OpenGL",
+        "/System/Library/Frameworks/OpenGL.framework/OpenGL",
+        "/System/Library/Frameworks/OpenGL.framework/Versions/Current/OpenGL"
+    };
+#else
+    static const char *NAMES[] = {"libGL.so.1", "libGL.so"};
+#endif
+
+    unsigned int index = 0;
+    for(index = 0; index < (sizeof(NAMES) / sizeof(NAMES[0])); index++) {
+        libGL = dlopen(NAMES[index], RTLD_NOW | RTLD_GLOBAL);
+
+        if(libGL != NULL) {
+#if defined(__APPLE__) || defined(__HAIKU__)
+            return 1;
+#else
+            gladGetProcAddressPtr = (PFNGLXGETPROCADDRESSPROC_PRIVATE)dlsym(libGL,
+                "glXGetProcAddressARB");
+            return gladGetProcAddressPtr != NULL;
+#endif
+        }
+    }
+
+    return 0;
+}
+
+static
+void close_gl(void) {
+    if(libGL != NULL) {
+        dlclose(libGL);
+        libGL = NULL;
+    }
+}
+#endif
+
+static
+void* get_proc(const char *namez) {
+    void* result = NULL;
+    if(libGL == NULL) return NULL;
+
+#if !defined(__APPLE__) && !defined(__HAIKU__)
+    if(gladGetProcAddressPtr != NULL) {
+        result = gladGetProcAddressPtr(namez);
+    }
+#endif
+    if(result == NULL) {
+#if defined(_WIN32) || defined(__CYGWIN__)
+        result = (void*)GetProcAddress((HMODULE) libGL, namez);
+#else
+        result = dlsym(libGL, namez);
+#endif
+    }
+
+    return result;
+}
+
+int gladLoadGL(void) {
+    int status = 0;
+
+    if(open_gl()) {
+        status = gladLoadGLLoader(&get_proc);
+        close_gl();
+    }
+
+    return status;
+}
+
+struct gladGLversionStruct GLVersion = { 0, 0 };
+
+#if defined(GL_ES_VERSION_3_0) || defined(GL_VERSION_3_0)
+#define _GLAD_IS_SOME_NEW_VERSION 1
+#endif
+
+static int max_loaded_major;
+static int max_loaded_minor;
+
+static const char *exts = NULL;
+static int num_exts_i = 0;
+static char **exts_i = NULL;
+
+static int get_exts(void) {
+#ifdef _GLAD_IS_SOME_NEW_VERSION
+    if(max_loaded_major < 3) {
+#endif
+        exts = (const char *)glGetString(GL_EXTENSIONS);
+#ifdef _GLAD_IS_SOME_NEW_VERSION
+    } else {
+        unsigned int index;
+
+        num_exts_i = 0;
+        glGetIntegerv(GL_NUM_EXTENSIONS, &num_exts_i);
+        if (num_exts_i > 0) {
+            exts_i = (char **)malloc((size_t)num_exts_i * (sizeof *exts_i));
+        }
+
+        if (exts_i == NULL) {
+            return 0;
+        }
+
+        for(index = 0; index < (unsigned)num_exts_i; index++) {
+            const char *gl_str_tmp = (const char*)glGetStringi(GL_EXTENSIONS, index);
+            size_t len = strlen(gl_str_tmp);
+
+            char *local_str = (char*)malloc((len+1) * sizeof(char));
+            if(local_str != NULL) {
+                memcpy(local_str, gl_str_tmp, (len+1) * sizeof(char));
+            }
+            exts_i[index] = local_str;
+        }
+    }
+#endif
+    return 1;
+}
+
+static void free_exts(void) {
+    if (exts_i != NULL) {
+        int index;
+        for(index = 0; index < num_exts_i; index++) {
+            free((char *)exts_i[index]);
+        }
+        free((void *)exts_i);
+        exts_i = NULL;
+    }
+}
+
+static int has_ext(const char *ext) {
+#ifdef _GLAD_IS_SOME_NEW_VERSION
+    if(max_loaded_major < 3) {
+#endif
+        const char *extensions;
+        const char *loc;
+        const char *terminator;
+        extensions = exts;
+        if(extensions == NULL || ext == NULL) {
+            return 0;
+        }
+
+        while(1) {
+            loc = strstr(extensions, ext);
+            if(loc == NULL) {
+                return 0;
+            }
+
+            terminator = loc + strlen(ext);
+            if((loc == extensions || *(loc - 1) == ' ') &&
+                (*terminator == ' ' || *terminator == '\0')) {
+                return 1;
+            }
+            extensions = terminator;
+        }
+#ifdef _GLAD_IS_SOME_NEW_VERSION
+    } else {
+        int index;
+        if(exts_i == NULL) return 0;
+        for(index = 0; index < num_exts_i; index++) {
+            const char *e = exts_i[index];
+
+            if(exts_i[index] != NULL && strcmp(e, ext) == 0) {
+                return 1;
+            }
+        }
+    }
+#endif
+
+    return 0;
+}
+int GLAD_GL_VERSION_1_0 = 0;
+int GLAD_GL_VERSION_1_1 = 0;
+int GLAD_GL_VERSION_1_2 = 0;
+int GLAD_GL_VERSION_1_3 = 0;
+int GLAD_GL_VERSION_1_4 = 0;
+int GLAD_GL_VERSION_1_5 = 0;
+int GLAD_GL_VERSION_2_0 = 0;
+int GLAD_GL_VERSION_2_1 = 0;
+int GLAD_GL_VERSION_3_0 = 0;
+int GLAD_GL_VERSION_3_1 = 0;
+int GLAD_GL_VERSION_3_2 = 0;
+int GLAD_GL_VERSION_3_3 = 0;
+int GLAD_GL_VERSION_4_0 = 0;
+int GLAD_GL_VERSION_4_1 = 0;
+int GLAD_GL_VERSION_4_2 = 0;
+int GLAD_GL_VERSION_4_3 = 0;
+int GLAD_GL_VERSION_4_4 = 0;
+int GLAD_GL_VERSION_4_5 = 0;
+int GLAD_GL_VERSION_4_6 = 0;
+int GLAD_GL_ES_VERSION_2_0 = 0;
+int GLAD_GL_ES_VERSION_3_0 = 0;
+int GLAD_GL_ES_VERSION_3_1 = 0;
+int GLAD_GL_ES_VERSION_3_2 = 0;
+PFNGLACTIVESHADERPROGRAMPROC glad_glActiveShaderProgram = NULL;
+PFNGLACTIVETEXTUREPROC glad_glActiveTexture = NULL;
+PFNGLATTACHSHADERPROC glad_glAttachShader = NULL;
+PFNGLBEGINCONDITIONALRENDERPROC glad_glBeginConditionalRender = NULL;
+PFNGLBEGINQUERYPROC glad_glBeginQuery = NULL;
+PFNGLBEGINQUERYINDEXEDPROC glad_glBeginQueryIndexed = NULL;
+PFNGLBEGINTRANSFORMFEEDBACKPROC glad_glBeginTransformFeedback = NULL;
+PFNGLBINDATTRIBLOCATIONPROC glad_glBindAttribLocation = NULL;
+PFNGLBINDBUFFERPROC glad_glBindBuffer = NULL;
+PFNGLBINDBUFFERBASEPROC glad_glBindBufferBase = NULL;
+PFNGLBINDBUFFERRANGEPROC glad_glBindBufferRange = NULL;
+PFNGLBINDBUFFERSBASEPROC glad_glBindBuffersBase = NULL;
+PFNGLBINDBUFFERSRANGEPROC glad_glBindBuffersRange = NULL;
+PFNGLBINDFRAGDATALOCATIONPROC glad_glBindFragDataLocation = NULL;
+PFNGLBINDFRAGDATALOCATIONINDEXEDPROC glad_glBindFragDataLocationIndexed = NULL;
+PFNGLBINDFRAMEBUFFERPROC glad_glBindFramebuffer = NULL;
+PFNGLBINDIMAGETEXTUREPROC glad_glBindImageTexture = NULL;
+PFNGLBINDIMAGETEXTURESPROC glad_glBindImageTextures = NULL;
+PFNGLBINDPROGRAMPIPELINEPROC glad_glBindProgramPipeline = NULL;
+PFNGLBINDRENDERBUFFERPROC glad_glBindRenderbuffer = NULL;
+PFNGLBINDSAMPLERPROC glad_glBindSampler = NULL;
+PFNGLBINDSAMPLERSPROC glad_glBindSamplers = NULL;
+PFNGLBINDTEXTUREPROC glad_glBindTexture = NULL;
+PFNGLBINDTEXTUREUNITPROC glad_glBindTextureUnit = NULL;
+PFNGLBINDTEXTURESPROC glad_glBindTextures = NULL;
+PFNGLBINDTRANSFORMFEEDBACKPROC glad_glBindTransformFeedback = NULL;
+PFNGLBINDVERTEXARRAYPROC glad_glBindVertexArray = NULL;
+PFNGLBINDVERTEXBUFFERPROC glad_glBindVertexBuffer = NULL;
+PFNGLBINDVERTEXBUFFERSPROC glad_glBindVertexBuffers = NULL;
+PFNGLBLENDBARRIERPROC glad_glBlendBarrier = NULL;
+PFNGLBLENDCOLORPROC glad_glBlendColor = NULL;
+PFNGLBLENDEQUATIONPROC glad_glBlendEquation = NULL;
+PFNGLBLENDEQUATIONSEPARATEPROC glad_glBlendEquationSeparate = NULL;
+PFNGLBLENDEQUATIONSEPARATEIPROC glad_glBlendEquationSeparatei = NULL;
+PFNGLBLENDEQUATIONIPROC glad_glBlendEquationi = NULL;
+PFNGLBLENDFUNCPROC glad_glBlendFunc = NULL;
+PFNGLBLENDFUNCSEPARATEPROC glad_glBlendFuncSeparate = NULL;
+PFNGLBLENDFUNCSEPARATEIPROC glad_glBlendFuncSeparatei = NULL;
+PFNGLBLENDFUNCIPROC glad_glBlendFunci = NULL;
+PFNGLBLITFRAMEBUFFERPROC glad_glBlitFramebuffer = NULL;
+PFNGLBLITNAMEDFRAMEBUFFERPROC glad_glBlitNamedFramebuffer = NULL;
+PFNGLBUFFERDATAPROC glad_glBufferData = NULL;
+PFNGLBUFFERSTORAGEPROC glad_glBufferStorage = NULL;
+PFNGLBUFFERSUBDATAPROC glad_glBufferSubData = NULL;
+PFNGLCHECKFRAMEBUFFERSTATUSPROC glad_glCheckFramebufferStatus = NULL;
+PFNGLCHECKNAMEDFRAMEBUFFERSTATUSPROC glad_glCheckNamedFramebufferStatus = NULL;
+PFNGLCLAMPCOLORPROC glad_glClampColor = NULL;
+PFNGLCLEARPROC glad_glClear = NULL;
+PFNGLCLEARBUFFERDATAPROC glad_glClearBufferData = NULL;
+PFNGLCLEARBUFFERSUBDATAPROC glad_glClearBufferSubData = NULL;
+PFNGLCLEARBUFFERFIPROC glad_glClearBufferfi = NULL;
+PFNGLCLEARBUFFERFVPROC glad_glClearBufferfv = NULL;
+PFNGLCLEARBUFFERIVPROC glad_glClearBufferiv = NULL;
+PFNGLCLEARBUFFERUIVPROC glad_glClearBufferuiv = NULL;
+PFNGLCLEARCOLORPROC glad_glClearColor = NULL;
+PFNGLCLEARDEPTHPROC glad_glClearDepth = NULL;
+PFNGLCLEARDEPTHFPROC glad_glClearDepthf = NULL;
+PFNGLCLEARNAMEDBUFFERDATAPROC glad_glClearNamedBufferData = NULL;
+PFNGLCLEARNAMEDBUFFERSUBDATAPROC glad_glClearNamedBufferSubData = NULL;
+PFNGLCLEARNAMEDFRAMEBUFFERFIPROC glad_glClearNamedFramebufferfi = NULL;
+PFNGLCLEARNAMEDFRAMEBUFFERFVPROC glad_glClearNamedFramebufferfv = NULL;
+PFNGLCLEARNAMEDFRAMEBUFFERIVPROC glad_glClearNamedFramebufferiv = NULL;
+PFNGLCLEARNAMEDFRAMEBUFFERUIVPROC glad_glClearNamedFramebufferuiv = NULL;
+PFNGLCLEARSTENCILPROC glad_glClearStencil = NULL;
+PFNGLCLEARTEXIMAGEPROC glad_glClearTexImage = NULL;
+PFNGLCLEARTEXSUBIMAGEPROC glad_glClearTexSubImage = NULL;
+PFNGLCLIENTWAITSYNCPROC glad_glClientWaitSync = NULL;
+PFNGLCLIPCONTROLPROC glad_glClipControl = NULL;
+PFNGLCOLORMASKPROC glad_glColorMask = NULL;
+PFNGLCOLORMASKIPROC glad_glColorMaski = NULL;
+PFNGLCOLORP3UIPROC glad_glColorP3ui = NULL;
+PFNGLCOLORP3UIVPROC glad_glColorP3uiv = NULL;
+PFNGLCOLORP4UIPROC glad_glColorP4ui = NULL;
+PFNGLCOLORP4UIVPROC glad_glColorP4uiv = NULL;
+PFNGLCOMPILESHADERPROC glad_glCompileShader = NULL;
+PFNGLCOMPRESSEDTEXIMAGE1DPROC glad_glCompressedTexImage1D = NULL;
+PFNGLCOMPRESSEDTEXIMAGE2DPROC glad_glCompressedTexImage2D = NULL;
+PFNGLCOMPRESSEDTEXIMAGE3DPROC glad_glCompressedTexImage3D = NULL;
+PFNGLCOMPRESSEDTEXSUBIMAGE1DPROC glad_glCompressedTexSubImage1D = NULL;
+PFNGLCOMPRESSEDTEXSUBIMAGE2DPROC glad_glCompressedTexSubImage2D = NULL;
+PFNGLCOMPRESSEDTEXSUBIMAGE3DPROC glad_glCompressedTexSubImage3D = NULL;
+PFNGLCOMPRESSEDTEXTURESUBIMAGE1DPROC glad_glCompressedTextureSubImage1D = NULL;
+PFNGLCOMPRESSEDTEXTURESUBIMAGE2DPROC glad_glCompressedTextureSubImage2D = NULL;
+PFNGLCOMPRESSEDTEXTURESUBIMAGE3DPROC glad_glCompressedTextureSubImage3D = NULL;
+PFNGLCOPYBUFFERSUBDATAPROC glad_glCopyBufferSubData = NULL;
+PFNGLCOPYIMAGESUBDATAPROC glad_glCopyImageSubData = NULL;
+PFNGLCOPYNAMEDBUFFERSUBDATAPROC glad_glCopyNamedBufferSubData = NULL;
+PFNGLCOPYTEXIMAGE1DPROC glad_glCopyTexImage1D = NULL;
+PFNGLCOPYTEXIMAGE2DPROC glad_glCopyTexImage2D = NULL;
+PFNGLCOPYTEXSUBIMAGE1DPROC glad_glCopyTexSubImage1D = NULL;
+PFNGLCOPYTEXSUBIMAGE2DPROC glad_glCopyTexSubImage2D = NULL;
+PFNGLCOPYTEXSUBIMAGE3DPROC glad_glCopyTexSubImage3D = NULL;
+PFNGLCOPYTEXTURESUBIMAGE1DPROC glad_glCopyTextureSubImage1D = NULL;
+PFNGLCOPYTEXTURESUBIMAGE2DPROC glad_glCopyTextureSubImage2D = NULL;
+PFNGLCOPYTEXTURESUBIMAGE3DPROC glad_glCopyTextureSubImage3D = NULL;
+PFNGLCREATEBUFFERSPROC glad_glCreateBuffers = NULL;
+PFNGLCREATEFRAMEBUFFERSPROC glad_glCreateFramebuffers = NULL;
+PFNGLCREATEPROGRAMPROC glad_glCreateProgram = NULL;
+PFNGLCREATEPROGRAMPIPELINESPROC glad_glCreateProgramPipelines = NULL;
+PFNGLCREATEQUERIESPROC glad_glCreateQueries = NULL;
+PFNGLCREATERENDERBUFFERSPROC glad_glCreateRenderbuffers = NULL;
+PFNGLCREATESAMPLERSPROC glad_glCreateSamplers = NULL;
+PFNGLCREATESHADERPROC glad_glCreateShader = NULL;
+PFNGLCREATESHADERPROGRAMVPROC glad_glCreateShaderProgramv = NULL;
+PFNGLCREATETEXTURESPROC glad_glCreateTextures = NULL;
+PFNGLCREATETRANSFORMFEEDBACKSPROC glad_glCreateTransformFeedbacks = NULL;
+PFNGLCREATEVERTEXARRAYSPROC glad_glCreateVertexArrays = NULL;
+PFNGLCULLFACEPROC glad_glCullFace = NULL;
+PFNGLDEBUGMESSAGECALLBACKPROC glad_glDebugMessageCallback = NULL;
+PFNGLDEBUGMESSAGECONTROLPROC glad_glDebugMessageControl = NULL;
+PFNGLDEBUGMESSAGEINSERTPROC glad_glDebugMessageInsert = NULL;
+PFNGLDELETEBUFFERSPROC glad_glDeleteBuffers = NULL;
+PFNGLDELETEFRAMEBUFFERSPROC glad_glDeleteFramebuffers = NULL;
+PFNGLDELETEPROGRAMPROC glad_glDeleteProgram = NULL;
+PFNGLDELETEPROGRAMPIPELINESPROC glad_glDeleteProgramPipelines = NULL;
+PFNGLDELETEQUERIESPROC glad_glDeleteQueries = NULL;
+PFNGLDELETERENDERBUFFERSPROC glad_glDeleteRenderbuffers = NULL;
+PFNGLDELETESAMPLERSPROC glad_glDeleteSamplers = NULL;
+PFNGLDELETESHADERPROC glad_glDeleteShader = NULL;
+PFNGLDELETESYNCPROC glad_glDeleteSync = NULL;
+PFNGLDELETETEXTURESPROC glad_glDeleteTextures = NULL;
+PFNGLDELETETRANSFORMFEEDBACKSPROC glad_glDeleteTransformFeedbacks = NULL;
+PFNGLDELETEVERTEXARRAYSPROC glad_glDeleteVertexArrays = NULL;
+PFNGLDEPTHFUNCPROC glad_glDepthFunc = NULL;
+PFNGLDEPTHMASKPROC glad_glDepthMask = NULL;
+PFNGLDEPTHRANGEPROC glad_glDepthRange = NULL;
+PFNGLDEPTHRANGEARRAYVPROC glad_glDepthRangeArrayv = NULL;
+PFNGLDEPTHRANGEINDEXEDPROC glad_glDepthRangeIndexed = NULL;
+PFNGLDEPTHRANGEFPROC glad_glDepthRangef = NULL;
+PFNGLDETACHSHADERPROC glad_glDetachShader = NULL;
+PFNGLDISABLEPROC glad_glDisable = NULL;
+PFNGLDISABLEVERTEXARRAYATTRIBPROC glad_glDisableVertexArrayAttrib = NULL;
+PFNGLDISABLEVERTEXATTRIBARRAYPROC glad_glDisableVertexAttribArray = NULL;
+PFNGLDISABLEIPROC glad_glDisablei = NULL;
+PFNGLDISPATCHCOMPUTEPROC glad_glDispatchCompute = NULL;
+PFNGLDISPATCHCOMPUTEINDIRECTPROC glad_glDispatchComputeIndirect = NULL;
+PFNGLDRAWARRAYSPROC glad_glDrawArrays = NULL;
+PFNGLDRAWARRAYSINDIRECTPROC glad_glDrawArraysIndirect = NULL;
+PFNGLDRAWARRAYSINSTANCEDPROC glad_glDrawArraysInstanced = NULL;
+PFNGLDRAWARRAYSINSTANCEDBASEINSTANCEPROC glad_glDrawArraysInstancedBaseInstance = NULL;
+PFNGLDRAWBUFFERPROC glad_glDrawBuffer = NULL;
+PFNGLDRAWBUFFERSPROC glad_glDrawBuffers = NULL;
+PFNGLDRAWELEMENTSPROC glad_glDrawElements = NULL;
+PFNGLDRAWELEMENTSBASEVERTEXPROC glad_glDrawElementsBaseVertex = NULL;
+PFNGLDRAWELEMENTSINDIRECTPROC glad_glDrawElementsIndirect = NULL;
+PFNGLDRAWELEMENTSINSTANCEDPROC glad_glDrawElementsInstanced = NULL;
+PFNGLDRAWELEMENTSINSTANCEDBASEINSTANCEPROC glad_glDrawElementsInstancedBaseInstance = NULL;
+PFNGLDRAWELEMENTSINSTANCEDBASEVERTEXPROC glad_glDrawElementsInstancedBaseVertex = NULL;
+PFNGLDRAWELEMENTSINSTANCEDBASEVERTEXBASEINSTANCEPROC glad_glDrawElementsInstancedBaseVertexBaseInstance = NULL;
+PFNGLDRAWRANGEELEMENTSPROC glad_glDrawRangeElements = NULL;
+PFNGLDRAWRANGEELEMENTSBASEVERTEXPROC glad_glDrawRangeElementsBaseVertex = NULL;
+PFNGLDRAWTRANSFORMFEEDBACKPROC glad_glDrawTransformFeedback = NULL;
+PFNGLDRAWTRANSFORMFEEDBACKINSTANCEDPROC glad_glDrawTransformFeedbackInstanced = NULL;
+PFNGLDRAWTRANSFORMFEEDBACKSTREAMPROC glad_glDrawTransformFeedbackStream = NULL;
+PFNGLDRAWTRANSFORMFEEDBACKSTREAMINSTANCEDPROC glad_glDrawTransformFeedbackStreamInstanced = NULL;
+PFNGLENABLEPROC glad_glEnable = NULL;
+PFNGLENABLEVERTEXARRAYATTRIBPROC glad_glEnableVertexArrayAttrib = NULL;
+PFNGLENABLEVERTEXATTRIBARRAYPROC glad_glEnableVertexAttribArray = NULL;
+PFNGLENABLEIPROC glad_glEnablei = NULL;
+PFNGLENDCONDITIONALRENDERPROC glad_glEndConditionalRender = NULL;
+PFNGLENDQUERYPROC glad_glEndQuery = NULL;
+PFNGLENDQUERYINDEXEDPROC glad_glEndQueryIndexed = NULL;
+PFNGLENDTRANSFORMFEEDBACKPROC glad_glEndTransformFeedback = NULL;
+PFNGLFENCESYNCPROC glad_glFenceSync = NULL;
+PFNGLFINISHPROC glad_glFinish = NULL;
+PFNGLFLUSHPROC glad_glFlush = NULL;
+PFNGLFLUSHMAPPEDBUFFERRANGEPROC glad_glFlushMappedBufferRange = NULL;
+PFNGLFLUSHMAPPEDNAMEDBUFFERRANGEPROC glad_glFlushMappedNamedBufferRange = NULL;
+PFNGLFRAMEBUFFERPARAMETERIPROC glad_glFramebufferParameteri = NULL;
+PFNGLFRAMEBUFFERRENDERBUFFERPROC glad_glFramebufferRenderbuffer = NULL;
+PFNGLFRAMEBUFFERTEXTUREPROC glad_glFramebufferTexture = NULL;
+PFNGLFRAMEBUFFERTEXTURE1DPROC glad_glFramebufferTexture1D = NULL;
+PFNGLFRAMEBUFFERTEXTURE2DPROC glad_glFramebufferTexture2D = NULL;
+PFNGLFRAMEBUFFERTEXTURE3DPROC glad_glFramebufferTexture3D = NULL;
+PFNGLFRAMEBUFFERTEXTURELAYERPROC glad_glFramebufferTextureLayer = NULL;
+PFNGLFRONTFACEPROC glad_glFrontFace = NULL;
+PFNGLGENBUFFERSPROC glad_glGenBuffers = NULL;
+PFNGLGENFRAMEBUFFERSPROC glad_glGenFramebuffers = NULL;
+PFNGLGENPROGRAMPIPELINESPROC glad_glGenProgramPipelines = NULL;
+PFNGLGENQUERIESPROC glad_glGenQueries = NULL;
+PFNGLGENRENDERBUFFERSPROC glad_glGenRenderbuffers = NULL;
+PFNGLGENSAMPLERSPROC glad_glGenSamplers = NULL;
+PFNGLGENTEXTURESPROC glad_glGenTextures = NULL;
+PFNGLGENTRANSFORMFEEDBACKSPROC glad_glGenTransformFeedbacks = NULL;
+PFNGLGENVERTEXARRAYSPROC glad_glGenVertexArrays = NULL;
+PFNGLGENERATEMIPMAPPROC glad_glGenerateMipmap = NULL;
+PFNGLGENERATETEXTUREMIPMAPPROC glad_glGenerateTextureMipmap = NULL;
+PFNGLGETACTIVEATOMICCOUNTERBUFFERIVPROC glad_glGetActiveAtomicCounterBufferiv = NULL;
+PFNGLGETACTIVEATTRIBPROC glad_glGetActiveAttrib = NULL;
+PFNGLGETACTIVESUBROUTINENAMEPROC glad_glGetActiveSubroutineName = NULL;
+PFNGLGETACTIVESUBROUTINEUNIFORMNAMEPROC glad_glGetActiveSubroutineUniformName = NULL;
+PFNGLGETACTIVESUBROUTINEUNIFORMIVPROC glad_glGetActiveSubroutineUniformiv = NULL;
+PFNGLGETACTIVEUNIFORMPROC glad_glGetActiveUniform = NULL;
+PFNGLGETACTIVEUNIFORMBLOCKNAMEPROC glad_glGetActiveUniformBlockName = NULL;
+PFNGLGETACTIVEUNIFORMBLOCKIVPROC glad_glGetActiveUniformBlockiv = NULL;
+PFNGLGETACTIVEUNIFORMNAMEPROC glad_glGetActiveUniformName = NULL;
+PFNGLGETACTIVEUNIFORMSIVPROC glad_glGetActiveUniformsiv = NULL;
+PFNGLGETATTACHEDSHADERSPROC glad_glGetAttachedShaders = NULL;
+PFNGLGETATTRIBLOCATIONPROC glad_glGetAttribLocation = NULL;
+PFNGLGETBOOLEANI_VPROC glad_glGetBooleani_v = NULL;
+PFNGLGETBOOLEANVPROC glad_glGetBooleanv = NULL;
+PFNGLGETBUFFERPARAMETERI64VPROC glad_glGetBufferParameteri64v = NULL;
+PFNGLGETBUFFERPARAMETERIVPROC glad_glGetBufferParameteriv = NULL;
+PFNGLGETBUFFERPOINTERVPROC glad_glGetBufferPointerv = NULL;
+PFNGLGETBUFFERSUBDATAPROC glad_glGetBufferSubData = NULL;
+PFNGLGETCOMPRESSEDTEXIMAGEPROC glad_glGetCompressedTexImage = NULL;
+PFNGLGETCOMPRESSEDTEXTUREIMAGEPROC glad_glGetCompressedTextureImage = NULL;
+PFNGLGETCOMPRESSEDTEXTURESUBIMAGEPROC glad_glGetCompressedTextureSubImage = NULL;
+PFNGLGETDEBUGMESSAGELOGPROC glad_glGetDebugMessageLog = NULL;
+PFNGLGETDOUBLEI_VPROC glad_glGetDoublei_v = NULL;
+PFNGLGETDOUBLEVPROC glad_glGetDoublev = NULL;
+PFNGLGETERRORPROC glad_glGetError = NULL;
+PFNGLGETFLOATI_VPROC glad_glGetFloati_v = NULL;
+PFNGLGETFLOATVPROC glad_glGetFloatv = NULL;
+PFNGLGETFRAGDATAINDEXPROC glad_glGetFragDataIndex = NULL;
+PFNGLGETFRAGDATALOCATIONPROC glad_glGetFragDataLocation = NULL;
+PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC glad_glGetFramebufferAttachmentParameteriv = NULL;
+PFNGLGETFRAMEBUFFERPARAMETERIVPROC glad_glGetFramebufferParameteriv = NULL;
+PFNGLGETGRAPHICSRESETSTATUSPROC glad_glGetGraphicsResetStatus = NULL;
+PFNGLGETINTEGER64I_VPROC glad_glGetInteger64i_v = NULL;
+PFNGLGETINTEGER64VPROC glad_glGetInteger64v = NULL;
+PFNGLGETINTEGERI_VPROC glad_glGetIntegeri_v = NULL;
+PFNGLGETINTEGERVPROC glad_glGetIntegerv = NULL;
+PFNGLGETINTERNALFORMATI64VPROC glad_glGetInternalformati64v = NULL;
+PFNGLGETINTERNALFORMATIVPROC glad_glGetInternalformativ = NULL;
+PFNGLGETMULTISAMPLEFVPROC glad_glGetMultisamplefv = NULL;
+PFNGLGETNAMEDBUFFERPARAMETERI64VPROC glad_glGetNamedBufferParameteri64v = NULL;
+PFNGLGETNAMEDBUFFERPARAMETERIVPROC glad_glGetNamedBufferParameteriv = NULL;
+PFNGLGETNAMEDBUFFERPOINTERVPROC glad_glGetNamedBufferPointerv = NULL;
+PFNGLGETNAMEDBUFFERSUBDATAPROC glad_glGetNamedBufferSubData = NULL;
+PFNGLGETNAMEDFRAMEBUFFERATTACHMENTPARAMETERIVPROC glad_glGetNamedFramebufferAttachmentParameteriv = NULL;
+PFNGLGETNAMEDFRAMEBUFFERPARAMETERIVPROC glad_glGetNamedFramebufferParameteriv = NULL;
+PFNGLGETNAMEDRENDERBUFFERPARAMETERIVPROC glad_glGetNamedRenderbufferParameteriv = NULL;
+PFNGLGETOBJECTLABELPROC glad_glGetObjectLabel = NULL;
+PFNGLGETOBJECTPTRLABELPROC glad_glGetObjectPtrLabel = NULL;
+PFNGLGETPOINTERVPROC glad_glGetPointerv = NULL;
+PFNGLGETPROGRAMBINARYPROC glad_glGetProgramBinary = NULL;
+PFNGLGETPROGRAMINFOLOGPROC glad_glGetProgramInfoLog = NULL;
+PFNGLGETPROGRAMINTERFACEIVPROC glad_glGetProgramInterfaceiv = NULL;
+PFNGLGETPROGRAMPIPELINEINFOLOGPROC glad_glGetProgramPipelineInfoLog = NULL;
+PFNGLGETPROGRAMPIPELINEIVPROC glad_glGetProgramPipelineiv = NULL;
+PFNGLGETPROGRAMRESOURCEINDEXPROC glad_glGetProgramResourceIndex = NULL;
+PFNGLGETPROGRAMRESOURCELOCATIONPROC glad_glGetProgramResourceLocation = NULL;
+PFNGLGETPROGRAMRESOURCELOCATIONINDEXPROC glad_glGetProgramResourceLocationIndex = NULL;
+PFNGLGETPROGRAMRESOURCENAMEPROC glad_glGetProgramResourceName = NULL;
+PFNGLGETPROGRAMRESOURCEIVPROC glad_glGetProgramResourceiv = NULL;
+PFNGLGETPROGRAMSTAGEIVPROC glad_glGetProgramStageiv = NULL;
+PFNGLGETPROGRAMIVPROC glad_glGetProgramiv = NULL;
+PFNGLGETQUERYBUFFEROBJECTI64VPROC glad_glGetQueryBufferObjecti64v = NULL;
+PFNGLGETQUERYBUFFEROBJECTIVPROC glad_glGetQueryBufferObjectiv = NULL;
+PFNGLGETQUERYBUFFEROBJECTUI64VPROC glad_glGetQueryBufferObjectui64v = NULL;
+PFNGLGETQUERYBUFFEROBJECTUIVPROC glad_glGetQueryBufferObjectuiv = NULL;
+PFNGLGETQUERYINDEXEDIVPROC glad_glGetQueryIndexediv = NULL;
+PFNGLGETQUERYOBJECTI64VPROC glad_glGetQueryObjecti64v = NULL;
+PFNGLGETQUERYOBJECTIVPROC glad_glGetQueryObjectiv = NULL;
+PFNGLGETQUERYOBJECTUI64VPROC glad_glGetQueryObjectui64v = NULL;
+PFNGLGETQUERYOBJECTUIVPROC glad_glGetQueryObjectuiv = NULL;
+PFNGLGETQUERYIVPROC glad_glGetQueryiv = NULL;
+PFNGLGETRENDERBUFFERPARAMETERIVPROC glad_glGetRenderbufferParameteriv = NULL;
+PFNGLGETSAMPLERPARAMETERIIVPROC glad_glGetSamplerParameterIiv = NULL;
+PFNGLGETSAMPLERPARAMETERIUIVPROC glad_glGetSamplerParameterIuiv = NULL;
+PFNGLGETSAMPLERPARAMETERFVPROC glad_glGetSamplerParameterfv = NULL;
+PFNGLGETSAMPLERPARAMETERIVPROC glad_glGetSamplerParameteriv = NULL;
+PFNGLGETSHADERINFOLOGPROC glad_glGetShaderInfoLog = NULL;
+PFNGLGETSHADERPRECISIONFORMATPROC glad_glGetShaderPrecisionFormat = NULL;
+PFNGLGETSHADERSOURCEPROC glad_glGetShaderSource = NULL;
+PFNGLGETSHADERIVPROC glad_glGetShaderiv = NULL;
+PFNGLGETSTRINGPROC glad_glGetString = NULL;
+PFNGLGETSTRINGIPROC glad_glGetStringi = NULL;
+PFNGLGETSUBROUTINEINDEXPROC glad_glGetSubroutineIndex = NULL;
+PFNGLGETSUBROUTINEUNIFORMLOCATIONPROC glad_glGetSubroutineUniformLocation = NULL;
+PFNGLGETSYNCIVPROC glad_glGetSynciv = NULL;
+PFNGLGETTEXIMAGEPROC glad_glGetTexImage = NULL;
+PFNGLGETTEXLEVELPARAMETERFVPROC glad_glGetTexLevelParameterfv = NULL;
+PFNGLGETTEXLEVELPARAMETERIVPROC glad_glGetTexLevelParameteriv = NULL;
+PFNGLGETTEXPARAMETERIIVPROC glad_glGetTexParameterIiv = NULL;
+PFNGLGETTEXPARAMETERIUIVPROC glad_glGetTexParameterIuiv = NULL;
+PFNGLGETTEXPARAMETERFVPROC glad_glGetTexParameterfv = NULL;
+PFNGLGETTEXPARAMETERIVPROC glad_glGetTexParameteriv = NULL;
+PFNGLGETTEXTUREIMAGEPROC glad_glGetTextureImage = NULL;
+PFNGLGETTEXTURELEVELPARAMETERFVPROC glad_glGetTextureLevelParameterfv = NULL;
+PFNGLGETTEXTURELEVELPARAMETERIVPROC glad_glGetTextureLevelParameteriv = NULL;
+PFNGLGETTEXTUREPARAMETERIIVPROC glad_glGetTextureParameterIiv = NULL;
+PFNGLGETTEXTUREPARAMETERIUIVPROC glad_glGetTextureParameterIuiv = NULL;
+PFNGLGETTEXTUREPARAMETERFVPROC glad_glGetTextureParameterfv = NULL;
+PFNGLGETTEXTUREPARAMETERIVPROC glad_glGetTextureParameteriv = NULL;
+PFNGLGETTEXTURESUBIMAGEPROC glad_glGetTextureSubImage = NULL;
+PFNGLGETTRANSFORMFEEDBACKVARYINGPROC glad_glGetTransformFeedbackVarying = NULL;
+PFNGLGETTRANSFORMFEEDBACKI64_VPROC glad_glGetTransformFeedbacki64_v = NULL;
+PFNGLGETTRANSFORMFEEDBACKI_VPROC glad_glGetTransformFeedbacki_v = NULL;
+PFNGLGETTRANSFORMFEEDBACKIVPROC glad_glGetTransformFeedbackiv = NULL;
+PFNGLGETUNIFORMBLOCKINDEXPROC glad_glGetUniformBlockIndex = NULL;
+PFNGLGETUNIFORMINDICESPROC glad_glGetUniformIndices = NULL;
+PFNGLGETUNIFORMLOCATIONPROC glad_glGetUniformLocation = NULL;
+PFNGLGETUNIFORMSUBROUTINEUIVPROC glad_glGetUniformSubroutineuiv = NULL;
+PFNGLGETUNIFORMDVPROC glad_glGetUniformdv = NULL;
+PFNGLGETUNIFORMFVPROC glad_glGetUniformfv = NULL;
+PFNGLGETUNIFORMIVPROC glad_glGetUniformiv = NULL;
+PFNGLGETUNIFORMUIVPROC glad_glGetUniformuiv = NULL;
+PFNGLGETVERTEXARRAYINDEXED64IVPROC glad_glGetVertexArrayIndexed64iv = NULL;
+PFNGLGETVERTEXARRAYINDEXEDIVPROC glad_glGetVertexArrayIndexediv = NULL;
+PFNGLGETVERTEXARRAYIVPROC glad_glGetVertexArrayiv = NULL;
+PFNGLGETVERTEXATTRIBIIVPROC glad_glGetVertexAttribIiv = NULL;
+PFNGLGETVERTEXATTRIBIUIVPROC glad_glGetVertexAttribIuiv = NULL;
+PFNGLGETVERTEXATTRIBLDVPROC glad_glGetVertexAttribLdv = NULL;
+PFNGLGETVERTEXATTRIBPOINTERVPROC glad_glGetVertexAttribPointerv = NULL;
+PFNGLGETVERTEXATTRIBDVPROC glad_glGetVertexAttribdv = NULL;
+PFNGLGETVERTEXATTRIBFVPROC glad_glGetVertexAttribfv = NULL;
+PFNGLGETVERTEXATTRIBIVPROC glad_glGetVertexAttribiv = NULL;
+PFNGLGETNCOLORTABLEPROC glad_glGetnColorTable = NULL;
+PFNGLGETNCOMPRESSEDTEXIMAGEPROC glad_glGetnCompressedTexImage = NULL;
+PFNGLGETNCONVOLUTIONFILTERPROC glad_glGetnConvolutionFilter = NULL;
+PFNGLGETNHISTOGRAMPROC glad_glGetnHistogram = NULL;
+PFNGLGETNMAPDVPROC glad_glGetnMapdv = NULL;
+PFNGLGETNMAPFVPROC glad_glGetnMapfv = NULL;
+PFNGLGETNMAPIVPROC glad_glGetnMapiv = NULL;
+PFNGLGETNMINMAXPROC glad_glGetnMinmax = NULL;
+PFNGLGETNPIXELMAPFVPROC glad_glGetnPixelMapfv = NULL;
+PFNGLGETNPIXELMAPUIVPROC glad_glGetnPixelMapuiv = NULL;
+PFNGLGETNPIXELMAPUSVPROC glad_glGetnPixelMapusv = NULL;
+PFNGLGETNPOLYGONSTIPPLEPROC glad_glGetnPolygonStipple = NULL;
+PFNGLGETNSEPARABLEFILTERPROC glad_glGetnSeparableFilter = NULL;
+PFNGLGETNTEXIMAGEPROC glad_glGetnTexImage = NULL;
+PFNGLGETNUNIFORMDVPROC glad_glGetnUniformdv = NULL;
+PFNGLGETNUNIFORMFVPROC glad_glGetnUniformfv = NULL;
+PFNGLGETNUNIFORMIVPROC glad_glGetnUniformiv = NULL;
+PFNGLGETNUNIFORMUIVPROC glad_glGetnUniformuiv = NULL;
+PFNGLHINTPROC glad_glHint = NULL;
+PFNGLINVALIDATEBUFFERDATAPROC glad_glInvalidateBufferData = NULL;
+PFNGLINVALIDATEBUFFERSUBDATAPROC glad_glInvalidateBufferSubData = NULL;
+PFNGLINVALIDATEFRAMEBUFFERPROC glad_glInvalidateFramebuffer = NULL;
+PFNGLINVALIDATENAMEDFRAMEBUFFERDATAPROC glad_glInvalidateNamedFramebufferData = NULL;
+PFNGLINVALIDATENAMEDFRAMEBUFFERSUBDATAPROC glad_glInvalidateNamedFramebufferSubData = NULL;
+PFNGLINVALIDATESUBFRAMEBUFFERPROC glad_glInvalidateSubFramebuffer = NULL;
+PFNGLINVALIDATETEXIMAGEPROC glad_glInvalidateTexImage = NULL;
+PFNGLINVALIDATETEXSUBIMAGEPROC glad_glInvalidateTexSubImage = NULL;
+PFNGLISBUFFERPROC glad_glIsBuffer = NULL;
+PFNGLISENABLEDPROC glad_glIsEnabled = NULL;
+PFNGLISENABLEDIPROC glad_glIsEnabledi = NULL;
+PFNGLISFRAMEBUFFERPROC glad_glIsFramebuffer = NULL;
+PFNGLISPROGRAMPROC glad_glIsProgram = NULL;
+PFNGLISPROGRAMPIPELINEPROC glad_glIsProgramPipeline = NULL;
+PFNGLISQUERYPROC glad_glIsQuery = NULL;
+PFNGLISRENDERBUFFERPROC glad_glIsRenderbuffer = NULL;
+PFNGLISSAMPLERPROC glad_glIsSampler = NULL;
+PFNGLISSHADERPROC glad_glIsShader = NULL;
+PFNGLISSYNCPROC glad_glIsSync = NULL;
+PFNGLISTEXTUREPROC glad_glIsTexture = NULL;
+PFNGLISTRANSFORMFEEDBACKPROC glad_glIsTransformFeedback = NULL;
+PFNGLISVERTEXARRAYPROC glad_glIsVertexArray = NULL;
+PFNGLLINEWIDTHPROC glad_glLineWidth = NULL;
+PFNGLLINKPROGRAMPROC glad_glLinkProgram = NULL;
+PFNGLLOGICOPPROC glad_glLogicOp = NULL;
+PFNGLMAPBUFFERPROC glad_glMapBuffer = NULL;
+PFNGLMAPBUFFERRANGEPROC glad_glMapBufferRange = NULL;
+PFNGLMAPNAMEDBUFFERPROC glad_glMapNamedBuffer = NULL;
+PFNGLMAPNAMEDBUFFERRANGEPROC glad_glMapNamedBufferRange = NULL;
+PFNGLMEMORYBARRIERPROC glad_glMemoryBarrier = NULL;
+PFNGLMEMORYBARRIERBYREGIONPROC glad_glMemoryBarrierByRegion = NULL;
+PFNGLMINSAMPLESHADINGPROC glad_glMinSampleShading = NULL;
+PFNGLMULTIDRAWARRAYSPROC glad_glMultiDrawArrays = NULL;
+PFNGLMULTIDRAWARRAYSINDIRECTPROC glad_glMultiDrawArraysIndirect = NULL;
+PFNGLMULTIDRAWARRAYSINDIRECTCOUNTPROC glad_glMultiDrawArraysIndirectCount = NULL;
+PFNGLMULTIDRAWELEMENTSPROC glad_glMultiDrawElements = NULL;
+PFNGLMULTIDRAWELEMENTSBASEVERTEXPROC glad_glMultiDrawElementsBaseVertex = NULL;
+PFNGLMULTIDRAWELEMENTSINDIRECTPROC glad_glMultiDrawElementsIndirect = NULL;
+PFNGLMULTIDRAWELEMENTSINDIRECTCOUNTPROC glad_glMultiDrawElementsIndirectCount = NULL;
+PFNGLMULTITEXCOORDP1UIPROC glad_glMultiTexCoordP1ui = NULL;
+PFNGLMULTITEXCOORDP1UIVPROC glad_glMultiTexCoordP1uiv = NULL;
+PFNGLMULTITEXCOORDP2UIPROC glad_glMultiTexCoordP2ui = NULL;
+PFNGLMULTITEXCOORDP2UIVPROC glad_glMultiTexCoordP2uiv = NULL;
+PFNGLMULTITEXCOORDP3UIPROC glad_glMultiTexCoordP3ui = NULL;
+PFNGLMULTITEXCOORDP3UIVPROC glad_glMultiTexCoordP3uiv = NULL;
+PFNGLMULTITEXCOORDP4UIPROC glad_glMultiTexCoordP4ui = NULL;
+PFNGLMULTITEXCOORDP4UIVPROC glad_glMultiTexCoordP4uiv = NULL;
+PFNGLNAMEDBUFFERDATAPROC glad_glNamedBufferData = NULL;
+PFNGLNAMEDBUFFERSTORAGEPROC glad_glNamedBufferStorage = NULL;
+PFNGLNAMEDBUFFERSUBDATAPROC glad_glNamedBufferSubData = NULL;
+PFNGLNAMEDFRAMEBUFFERDRAWBUFFERPROC glad_glNamedFramebufferDrawBuffer = NULL;
+PFNGLNAMEDFRAMEBUFFERDRAWBUFFERSPROC glad_glNamedFramebufferDrawBuffers = NULL;
+PFNGLNAMEDFRAMEBUFFERPARAMETERIPROC glad_glNamedFramebufferParameteri = NULL;
+PFNGLNAMEDFRAMEBUFFERREADBUFFERPROC glad_glNamedFramebufferReadBuffer = NULL;
+PFNGLNAMEDFRAMEBUFFERRENDERBUFFERPROC glad_glNamedFramebufferRenderbuffer = NULL;
+PFNGLNAMEDFRAMEBUFFERTEXTUREPROC glad_glNamedFramebufferTexture = NULL;
+PFNGLNAMEDFRAMEBUFFERTEXTURELAYERPROC glad_glNamedFramebufferTextureLayer = NULL;
+PFNGLNAMEDRENDERBUFFERSTORAGEPROC glad_glNamedRenderbufferStorage = NULL;
+PFNGLNAMEDRENDERBUFFERSTORAGEMULTISAMPLEPROC glad_glNamedRenderbufferStorageMultisample = NULL;
+PFNGLNORMALP3UIPROC glad_glNormalP3ui = NULL;
+PFNGLNORMALP3UIVPROC glad_glNormalP3uiv = NULL;
+PFNGLOBJECTLABELPROC glad_glObjectLabel = NULL;
+PFNGLOBJECTPTRLABELPROC glad_glObjectPtrLabel = NULL;
+PFNGLPATCHPARAMETERFVPROC glad_glPatchParameterfv = NULL;
+PFNGLPATCHPARAMETERIPROC glad_glPatchParameteri = NULL;
+PFNGLPAUSETRANSFORMFEEDBACKPROC glad_glPauseTransformFeedback = NULL;
+PFNGLPIXELSTOREFPROC glad_glPixelStoref = NULL;
+PFNGLPIXELSTOREIPROC glad_glPixelStorei = NULL;
+PFNGLPOINTPARAMETERFPROC glad_glPointParameterf = NULL;
+PFNGLPOINTPARAMETERFVPROC glad_glPointParameterfv = NULL;
+PFNGLPOINTPARAMETERIPROC glad_glPointParameteri = NULL;
+PFNGLPOINTPARAMETERIVPROC glad_glPointParameteriv = NULL;
+PFNGLPOINTSIZEPROC glad_glPointSize = NULL;
+PFNGLPOLYGONMODEPROC glad_glPolygonMode = NULL;
+PFNGLPOLYGONOFFSETPROC glad_glPolygonOffset = NULL;
+PFNGLPOLYGONOFFSETCLAMPPROC glad_glPolygonOffsetClamp = NULL;
+PFNGLPOPDEBUGGROUPPROC glad_glPopDebugGroup = NULL;
+PFNGLPRIMITIVEBOUNDINGBOXPROC glad_glPrimitiveBoundingBox = NULL;
+PFNGLPRIMITIVERESTARTINDEXPROC glad_glPrimitiveRestartIndex = NULL;
+PFNGLPROGRAMBINARYPROC glad_glProgramBinary = NULL;
+PFNGLPROGRAMPARAMETERIPROC glad_glProgramParameteri = NULL;
+PFNGLPROGRAMUNIFORM1DPROC glad_glProgramUniform1d = NULL;
+PFNGLPROGRAMUNIFORM1DVPROC glad_glProgramUniform1dv = NULL;
+PFNGLPROGRAMUNIFORM1FPROC glad_glProgramUniform1f = NULL;
+PFNGLPROGRAMUNIFORM1FVPROC glad_glProgramUniform1fv = NULL;
+PFNGLPROGRAMUNIFORM1IPROC glad_glProgramUniform1i = NULL;
+PFNGLPROGRAMUNIFORM1IVPROC glad_glProgramUniform1iv = NULL;
+PFNGLPROGRAMUNIFORM1UIPROC glad_glProgramUniform1ui = NULL;
+PFNGLPROGRAMUNIFORM1UIVPROC glad_glProgramUniform1uiv = NULL;
+PFNGLPROGRAMUNIFORM2DPROC glad_glProgramUniform2d = NULL;
+PFNGLPROGRAMUNIFORM2DVPROC glad_glProgramUniform2dv = NULL;
+PFNGLPROGRAMUNIFORM2FPROC glad_glProgramUniform2f = NULL;
+PFNGLPROGRAMUNIFORM2FVPROC glad_glProgramUniform2fv = NULL;
+PFNGLPROGRAMUNIFORM2IPROC glad_glProgramUniform2i = NULL;
+PFNGLPROGRAMUNIFORM2IVPROC glad_glProgramUniform2iv = NULL;
+PFNGLPROGRAMUNIFORM2UIPROC glad_glProgramUniform2ui = NULL;
+PFNGLPROGRAMUNIFORM2UIVPROC glad_glProgramUniform2uiv = NULL;
+PFNGLPROGRAMUNIFORM3DPROC glad_glProgramUniform3d = NULL;
+PFNGLPROGRAMUNIFORM3DVPROC glad_glProgramUniform3dv = NULL;
+PFNGLPROGRAMUNIFORM3FPROC glad_glProgramUniform3f = NULL;
+PFNGLPROGRAMUNIFORM3FVPROC glad_glProgramUniform3fv = NULL;
+PFNGLPROGRAMUNIFORM3IPROC glad_glProgramUniform3i = NULL;
+PFNGLPROGRAMUNIFORM3IVPROC glad_glProgramUniform3iv = NULL;
+PFNGLPROGRAMUNIFORM3UIPROC glad_glProgramUniform3ui = NULL;
+PFNGLPROGRAMUNIFORM3UIVPROC glad_glProgramUniform3uiv = NULL;
+PFNGLPROGRAMUNIFORM4DPROC glad_glProgramUniform4d = NULL;
+PFNGLPROGRAMUNIFORM4DVPROC glad_glProgramUniform4dv = NULL;
+PFNGLPROGRAMUNIFORM4FPROC glad_glProgramUniform4f = NULL;
+PFNGLPROGRAMUNIFORM4FVPROC glad_glProgramUniform4fv = NULL;
+PFNGLPROGRAMUNIFORM4IPROC glad_glProgramUniform4i = NULL;
+PFNGLPROGRAMUNIFORM4IVPROC glad_glProgramUniform4iv = NULL;
+PFNGLPROGRAMUNIFORM4UIPROC glad_glProgramUniform4ui = NULL;
+PFNGLPROGRAMUNIFORM4UIVPROC glad_glProgramUniform4uiv = NULL;
+PFNGLPROGRAMUNIFORMMATRIX2DVPROC glad_glProgramUniformMatrix2dv = NULL;
+PFNGLPROGRAMUNIFORMMATRIX2FVPROC glad_glProgramUniformMatrix2fv = NULL;
+PFNGLPROGRAMUNIFORMMATRIX2X3DVPROC glad_glProgramUniformMatrix2x3dv = NULL;
+PFNGLPROGRAMUNIFORMMATRIX2X3FVPROC glad_glProgramUniformMatrix2x3fv = NULL;
+PFNGLPROGRAMUNIFORMMATRIX2X4DVPROC glad_glProgramUniformMatrix2x4dv = NULL;
+PFNGLPROGRAMUNIFORMMATRIX2X4FVPROC glad_glProgramUniformMatrix2x4fv = NULL;
+PFNGLPROGRAMUNIFORMMATRIX3DVPROC glad_glProgramUniformMatrix3dv = NULL;
+PFNGLPROGRAMUNIFORMMATRIX3FVPROC glad_glProgramUniformMatrix3fv = NULL;
+PFNGLPROGRAMUNIFORMMATRIX3X2DVPROC glad_glProgramUniformMatrix3x2dv = NULL;
+PFNGLPROGRAMUNIFORMMATRIX3X2FVPROC glad_glProgramUniformMatrix3x2fv = NULL;
+PFNGLPROGRAMUNIFORMMATRIX3X4DVPROC glad_glProgramUniformMatrix3x4dv = NULL;
+PFNGLPROGRAMUNIFORMMATRIX3X4FVPROC glad_glProgramUniformMatrix3x4fv = NULL;
+PFNGLPROGRAMUNIFORMMATRIX4DVPROC glad_glProgramUniformMatrix4dv = NULL;
+PFNGLPROGRAMUNIFORMMATRIX4FVPROC glad_glProgramUniformMatrix4fv = NULL;
+PFNGLPROGRAMUNIFORMMATRIX4X2DVPROC glad_glProgramUniformMatrix4x2dv = NULL;
+PFNGLPROGRAMUNIFORMMATRIX4X2FVPROC glad_glProgramUniformMatrix4x2fv = NULL;
+PFNGLPROGRAMUNIFORMMATRIX4X3DVPROC glad_glProgramUniformMatrix4x3dv = NULL;
+PFNGLPROGRAMUNIFORMMATRIX4X3FVPROC glad_glProgramUniformMatrix4x3fv = NULL;
+PFNGLPROVOKINGVERTEXPROC glad_glProvokingVertex = NULL;
+PFNGLPUSHDEBUGGROUPPROC glad_glPushDebugGroup = NULL;
+PFNGLQUERYCOUNTERPROC glad_glQueryCounter = NULL;
+PFNGLREADBUFFERPROC glad_glReadBuffer = NULL;
+PFNGLREADPIXELSPROC glad_glReadPixels = NULL;
+PFNGLREADNPIXELSPROC glad_glReadnPixels = NULL;
+PFNGLRELEASESHADERCOMPILERPROC glad_glReleaseShaderCompiler = NULL;
+PFNGLRENDERBUFFERSTORAGEPROC glad_glRenderbufferStorage = NULL;
+PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC glad_glRenderbufferStorageMultisample = NULL;
+PFNGLRESUMETRANSFORMFEEDBACKPROC glad_glResumeTransformFeedback = NULL;
+PFNGLSAMPLECOVERAGEPROC glad_glSampleCoverage = NULL;
+PFNGLSAMPLEMASKIPROC glad_glSampleMaski = NULL;
+PFNGLSAMPLERPARAMETERIIVPROC glad_glSamplerParameterIiv = NULL;
+PFNGLSAMPLERPARAMETERIUIVPROC glad_glSamplerParameterIuiv = NULL;
+PFNGLSAMPLERPARAMETERFPROC glad_glSamplerParameterf = NULL;
+PFNGLSAMPLERPARAMETERFVPROC glad_glSamplerParameterfv = NULL;
+PFNGLSAMPLERPARAMETERIPROC glad_glSamplerParameteri = NULL;
+PFNGLSAMPLERPARAMETERIVPROC glad_glSamplerParameteriv = NULL;
+PFNGLSCISSORPROC glad_glScissor = NULL;
+PFNGLSCISSORARRAYVPROC glad_glScissorArrayv = NULL;
+PFNGLSCISSORINDEXEDPROC glad_glScissorIndexed = NULL;
+PFNGLSCISSORINDEXEDVPROC glad_glScissorIndexedv = NULL;
+PFNGLSECONDARYCOLORP3UIPROC glad_glSecondaryColorP3ui = NULL;
+PFNGLSECONDARYCOLORP3UIVPROC glad_glSecondaryColorP3uiv = NULL;
+PFNGLSHADERBINARYPROC glad_glShaderBinary = NULL;
+PFNGLSHADERSOURCEPROC glad_glShaderSource = NULL;
+PFNGLSHADERSTORAGEBLOCKBINDINGPROC glad_glShaderStorageBlockBinding = NULL;
+PFNGLSPECIALIZESHADERPROC glad_glSpecializeShader = NULL;
+PFNGLSTENCILFUNCPROC glad_glStencilFunc = NULL;
+PFNGLSTENCILFUNCSEPARATEPROC glad_glStencilFuncSeparate = NULL;
+PFNGLSTENCILMASKPROC glad_glStencilMask = NULL;
+PFNGLSTENCILMASKSEPARATEPROC glad_glStencilMaskSeparate = NULL;
+PFNGLSTENCILOPPROC glad_glStencilOp = NULL;
+PFNGLSTENCILOPSEPARATEPROC glad_glStencilOpSeparate = NULL;
+PFNGLTEXBUFFERPROC glad_glTexBuffer = NULL;
+PFNGLTEXBUFFERRANGEPROC glad_glTexBufferRange = NULL;
+PFNGLTEXCOORDP1UIPROC glad_glTexCoordP1ui = NULL;
+PFNGLTEXCOORDP1UIVPROC glad_glTexCoordP1uiv = NULL;
+PFNGLTEXCOORDP2UIPROC glad_glTexCoordP2ui = NULL;
+PFNGLTEXCOORDP2UIVPROC glad_glTexCoordP2uiv = NULL;
+PFNGLTEXCOORDP3UIPROC glad_glTexCoordP3ui = NULL;
+PFNGLTEXCOORDP3UIVPROC glad_glTexCoordP3uiv = NULL;
+PFNGLTEXCOORDP4UIPROC glad_glTexCoordP4ui = NULL;
+PFNGLTEXCOORDP4UIVPROC glad_glTexCoordP4uiv = NULL;
+PFNGLTEXIMAGE1DPROC glad_glTexImage1D = NULL;
+PFNGLTEXIMAGE2DPROC glad_glTexImage2D = NULL;
+PFNGLTEXIMAGE2DMULTISAMPLEPROC glad_glTexImage2DMultisample = NULL;
+PFNGLTEXIMAGE3DPROC glad_glTexImage3D = NULL;
+PFNGLTEXIMAGE3DMULTISAMPLEPROC glad_glTexImage3DMultisample = NULL;
+PFNGLTEXPARAMETERIIVPROC glad_glTexParameterIiv = NULL;
+PFNGLTEXPARAMETERIUIVPROC glad_glTexParameterIuiv = NULL;
+PFNGLTEXPARAMETERFPROC glad_glTexParameterf = NULL;
+PFNGLTEXPARAMETERFVPROC glad_glTexParameterfv = NULL;
+PFNGLTEXPARAMETERIPROC glad_glTexParameteri = NULL;
+PFNGLTEXPARAMETERIVPROC glad_glTexParameteriv = NULL;
+PFNGLTEXSTORAGE1DPROC glad_glTexStorage1D = NULL;
+PFNGLTEXSTORAGE2DPROC glad_glTexStorage2D = NULL;
+PFNGLTEXSTORAGE2DMULTISAMPLEPROC glad_glTexStorage2DMultisample = NULL;
+PFNGLTEXSTORAGE3DPROC glad_glTexStorage3D = NULL;
+PFNGLTEXSTORAGE3DMULTISAMPLEPROC glad_glTexStorage3DMultisample = NULL;
+PFNGLTEXSUBIMAGE1DPROC glad_glTexSubImage1D = NULL;
+PFNGLTEXSUBIMAGE2DPROC glad_glTexSubImage2D = NULL;
+PFNGLTEXSUBIMAGE3DPROC glad_glTexSubImage3D = NULL;
+PFNGLTEXTUREBARRIERPROC glad_glTextureBarrier = NULL;
+PFNGLTEXTUREBUFFERPROC glad_glTextureBuffer = NULL;
+PFNGLTEXTUREBUFFERRANGEPROC glad_glTextureBufferRange = NULL;
+PFNGLTEXTUREPARAMETERIIVPROC glad_glTextureParameterIiv = NULL;
+PFNGLTEXTUREPARAMETERIUIVPROC glad_glTextureParameterIuiv = NULL;
+PFNGLTEXTUREPARAMETERFPROC glad_glTextureParameterf = NULL;
+PFNGLTEXTUREPARAMETERFVPROC glad_glTextureParameterfv = NULL;
+PFNGLTEXTUREPARAMETERIPROC glad_glTextureParameteri = NULL;
+PFNGLTEXTUREPARAMETERIVPROC glad_glTextureParameteriv = NULL;
+PFNGLTEXTURESTORAGE1DPROC glad_glTextureStorage1D = NULL;
+PFNGLTEXTURESTORAGE2DPROC glad_glTextureStorage2D = NULL;
+PFNGLTEXTURESTORAGE2DMULTISAMPLEPROC glad_glTextureStorage2DMultisample = NULL;
+PFNGLTEXTURESTORAGE3DPROC glad_glTextureStorage3D = NULL;
+PFNGLTEXTURESTORAGE3DMULTISAMPLEPROC glad_glTextureStorage3DMultisample = NULL;
+PFNGLTEXTURESUBIMAGE1DPROC glad_glTextureSubImage1D = NULL;
+PFNGLTEXTURESUBIMAGE2DPROC glad_glTextureSubImage2D = NULL;
+PFNGLTEXTURESUBIMAGE3DPROC glad_glTextureSubImage3D = NULL;
+PFNGLTEXTUREVIEWPROC glad_glTextureView = NULL;
+PFNGLTRANSFORMFEEDBACKBUFFERBASEPROC glad_glTransformFeedbackBufferBase = NULL;
+PFNGLTRANSFORMFEEDBACKBUFFERRANGEPROC glad_glTransformFeedbackBufferRange = NULL;
+PFNGLTRANSFORMFEEDBACKVARYINGSPROC glad_glTransformFeedbackVaryings = NULL;
+PFNGLUNIFORM1DPROC glad_glUniform1d = NULL;
+PFNGLUNIFORM1DVPROC glad_glUniform1dv = NULL;
+PFNGLUNIFORM1FPROC glad_glUniform1f = NULL;
+PFNGLUNIFORM1FVPROC glad_glUniform1fv = NULL;
+PFNGLUNIFORM1IPROC glad_glUniform1i = NULL;
+PFNGLUNIFORM1IVPROC glad_glUniform1iv = NULL;
+PFNGLUNIFORM1UIPROC glad_glUniform1ui = NULL;
+PFNGLUNIFORM1UIVPROC glad_glUniform1uiv = NULL;
+PFNGLUNIFORM2DPROC glad_glUniform2d = NULL;
+PFNGLUNIFORM2DVPROC glad_glUniform2dv = NULL;
+PFNGLUNIFORM2FPROC glad_glUniform2f = NULL;
+PFNGLUNIFORM2FVPROC glad_glUniform2fv = NULL;
+PFNGLUNIFORM2IPROC glad_glUniform2i = NULL;
+PFNGLUNIFORM2IVPROC glad_glUniform2iv = NULL;
+PFNGLUNIFORM2UIPROC glad_glUniform2ui = NULL;
+PFNGLUNIFORM2UIVPROC glad_glUniform2uiv = NULL;
+PFNGLUNIFORM3DPROC glad_glUniform3d = NULL;
+PFNGLUNIFORM3DVPROC glad_glUniform3dv = NULL;
+PFNGLUNIFORM3FPROC glad_glUniform3f = NULL;
+PFNGLUNIFORM3FVPROC glad_glUniform3fv = NULL;
+PFNGLUNIFORM3IPROC glad_glUniform3i = NULL;
+PFNGLUNIFORM3IVPROC glad_glUniform3iv = NULL;
+PFNGLUNIFORM3UIPROC glad_glUniform3ui = NULL;
+PFNGLUNIFORM3UIVPROC glad_glUniform3uiv = NULL;
+PFNGLUNIFORM4DPROC glad_glUniform4d = NULL;
+PFNGLUNIFORM4DVPROC glad_glUniform4dv = NULL;
+PFNGLUNIFORM4FPROC glad_glUniform4f = NULL;
+PFNGLUNIFORM4FVPROC glad_glUniform4fv = NULL;
+PFNGLUNIFORM4IPROC glad_glUniform4i = NULL;
+PFNGLUNIFORM4IVPROC glad_glUniform4iv = NULL;
+PFNGLUNIFORM4UIPROC glad_glUniform4ui = NULL;
+PFNGLUNIFORM4UIVPROC glad_glUniform4uiv = NULL;
+PFNGLUNIFORMBLOCKBINDINGPROC glad_glUniformBlockBinding = NULL;
+PFNGLUNIFORMMATRIX2DVPROC glad_glUniformMatrix2dv = NULL;
+PFNGLUNIFORMMATRIX2FVPROC glad_glUniformMatrix2fv = NULL;
+PFNGLUNIFORMMATRIX2X3DVPROC glad_glUniformMatrix2x3dv = NULL;
+PFNGLUNIFORMMATRIX2X3FVPROC glad_glUniformMatrix2x3fv = NULL;
+PFNGLUNIFORMMATRIX2X4DVPROC glad_glUniformMatrix2x4dv = NULL;
+PFNGLUNIFORMMATRIX2X4FVPROC glad_glUniformMatrix2x4fv = NULL;
+PFNGLUNIFORMMATRIX3DVPROC glad_glUniformMatrix3dv = NULL;
+PFNGLUNIFORMMATRIX3FVPROC glad_glUniformMatrix3fv = NULL;
+PFNGLUNIFORMMATRIX3X2DVPROC glad_glUniformMatrix3x2dv = NULL;
+PFNGLUNIFORMMATRIX3X2FVPROC glad_glUniformMatrix3x2fv = NULL;
+PFNGLUNIFORMMATRIX3X4DVPROC glad_glUniformMatrix3x4dv = NULL;
+PFNGLUNIFORMMATRIX3X4FVPROC glad_glUniformMatrix3x4fv = NULL;
+PFNGLUNIFORMMATRIX4DVPROC glad_glUniformMatrix4dv = NULL;
+PFNGLUNIFORMMATRIX4FVPROC glad_glUniformMatrix4fv = NULL;
+PFNGLUNIFORMMATRIX4X2DVPROC glad_glUniformMatrix4x2dv = NULL;
+PFNGLUNIFORMMATRIX4X2FVPROC glad_glUniformMatrix4x2fv = NULL;
+PFNGLUNIFORMMATRIX4X3DVPROC glad_glUniformMatrix4x3dv = NULL;
+PFNGLUNIFORMMATRIX4X3FVPROC glad_glUniformMatrix4x3fv = NULL;
+PFNGLUNIFORMSUBROUTINESUIVPROC glad_glUniformSubroutinesuiv = NULL;
+PFNGLUNMAPBUFFERPROC glad_glUnmapBuffer = NULL;
+PFNGLUNMAPNAMEDBUFFERPROC glad_glUnmapNamedBuffer = NULL;
+PFNGLUSEPROGRAMPROC glad_glUseProgram = NULL;
+PFNGLUSEPROGRAMSTAGESPROC glad_glUseProgramStages = NULL;
+PFNGLVALIDATEPROGRAMPROC glad_glValidateProgram = NULL;
+PFNGLVALIDATEPROGRAMPIPELINEPROC glad_glValidateProgramPipeline = NULL;
+PFNGLVERTEXARRAYATTRIBBINDINGPROC glad_glVertexArrayAttribBinding = NULL;
+PFNGLVERTEXARRAYATTRIBFORMATPROC glad_glVertexArrayAttribFormat = NULL;
+PFNGLVERTEXARRAYATTRIBIFORMATPROC glad_glVertexArrayAttribIFormat = NULL;
+PFNGLVERTEXARRAYATTRIBLFORMATPROC glad_glVertexArrayAttribLFormat = NULL;
+PFNGLVERTEXARRAYBINDINGDIVISORPROC glad_glVertexArrayBindingDivisor = NULL;
+PFNGLVERTEXARRAYELEMENTBUFFERPROC glad_glVertexArrayElementBuffer = NULL;
+PFNGLVERTEXARRAYVERTEXBUFFERPROC glad_glVertexArrayVertexBuffer = NULL;
+PFNGLVERTEXARRAYVERTEXBUFFERSPROC glad_glVertexArrayVertexBuffers = NULL;
+PFNGLVERTEXATTRIB1DPROC glad_glVertexAttrib1d = NULL;
+PFNGLVERTEXATTRIB1DVPROC glad_glVertexAttrib1dv = NULL;
+PFNGLVERTEXATTRIB1FPROC glad_glVertexAttrib1f = NULL;
+PFNGLVERTEXATTRIB1FVPROC glad_glVertexAttrib1fv = NULL;
+PFNGLVERTEXATTRIB1SPROC glad_glVertexAttrib1s = NULL;
+PFNGLVERTEXATTRIB1SVPROC glad_glVertexAttrib1sv = NULL;
+PFNGLVERTEXATTRIB2DPROC glad_glVertexAttrib2d = NULL;
+PFNGLVERTEXATTRIB2DVPROC glad_glVertexAttrib2dv = NULL;
+PFNGLVERTEXATTRIB2FPROC glad_glVertexAttrib2f = NULL;
+PFNGLVERTEXATTRIB2FVPROC glad_glVertexAttrib2fv = NULL;
+PFNGLVERTEXATTRIB2SPROC glad_glVertexAttrib2s = NULL;
+PFNGLVERTEXATTRIB2SVPROC glad_glVertexAttrib2sv = NULL;
+PFNGLVERTEXATTRIB3DPROC glad_glVertexAttrib3d = NULL;
+PFNGLVERTEXATTRIB3DVPROC glad_glVertexAttrib3dv = NULL;
+PFNGLVERTEXATTRIB3FPROC glad_glVertexAttrib3f = NULL;
+PFNGLVERTEXATTRIB3FVPROC glad_glVertexAttrib3fv = NULL;
+PFNGLVERTEXATTRIB3SPROC glad_glVertexAttrib3s = NULL;
+PFNGLVERTEXATTRIB3SVPROC glad_glVertexAttrib3sv = NULL;
+PFNGLVERTEXATTRIB4NBVPROC glad_glVertexAttrib4Nbv = NULL;
+PFNGLVERTEXATTRIB4NIVPROC glad_glVertexAttrib4Niv = NULL;
+PFNGLVERTEXATTRIB4NSVPROC glad_glVertexAttrib4Nsv = NULL;
+PFNGLVERTEXATTRIB4NUBPROC glad_glVertexAttrib4Nub = NULL;
+PFNGLVERTEXATTRIB4NUBVPROC glad_glVertexAttrib4Nubv = NULL;
+PFNGLVERTEXATTRIB4NUIVPROC glad_glVertexAttrib4Nuiv = NULL;
+PFNGLVERTEXATTRIB4NUSVPROC glad_glVertexAttrib4Nusv = NULL;
+PFNGLVERTEXATTRIB4BVPROC glad_glVertexAttrib4bv = NULL;
+PFNGLVERTEXATTRIB4DPROC glad_glVertexAttrib4d = NULL;
+PFNGLVERTEXATTRIB4DVPROC glad_glVertexAttrib4dv = NULL;
+PFNGLVERTEXATTRIB4FPROC glad_glVertexAttrib4f = NULL;
+PFNGLVERTEXATTRIB4FVPROC glad_glVertexAttrib4fv = NULL;
+PFNGLVERTEXATTRIB4IVPROC glad_glVertexAttrib4iv = NULL;
+PFNGLVERTEXATTRIB4SPROC glad_glVertexAttrib4s = NULL;
+PFNGLVERTEXATTRIB4SVPROC glad_glVertexAttrib4sv = NULL;
+PFNGLVERTEXATTRIB4UBVPROC glad_glVertexAttrib4ubv = NULL;
+PFNGLVERTEXATTRIB4UIVPROC glad_glVertexAttrib4uiv = NULL;
+PFNGLVERTEXATTRIB4USVPROC glad_glVertexAttrib4usv = NULL;
+PFNGLVERTEXATTRIBBINDINGPROC glad_glVertexAttribBinding = NULL;
+PFNGLVERTEXATTRIBDIVISORPROC glad_glVertexAttribDivisor = NULL;
+PFNGLVERTEXATTRIBFORMATPROC glad_glVertexAttribFormat = NULL;
+PFNGLVERTEXATTRIBI1IPROC glad_glVertexAttribI1i = NULL;
+PFNGLVERTEXATTRIBI1IVPROC glad_glVertexAttribI1iv = NULL;
+PFNGLVERTEXATTRIBI1UIPROC glad_glVertexAttribI1ui = NULL;
+PFNGLVERTEXATTRIBI1UIVPROC glad_glVertexAttribI1uiv = NULL;
+PFNGLVERTEXATTRIBI2IPROC glad_glVertexAttribI2i = NULL;
+PFNGLVERTEXATTRIBI2IVPROC glad_glVertexAttribI2iv = NULL;
+PFNGLVERTEXATTRIBI2UIPROC glad_glVertexAttribI2ui = NULL;
+PFNGLVERTEXATTRIBI2UIVPROC glad_glVertexAttribI2uiv = NULL;
+PFNGLVERTEXATTRIBI3IPROC glad_glVertexAttribI3i = NULL;
+PFNGLVERTEXATTRIBI3IVPROC glad_glVertexAttribI3iv = NULL;
+PFNGLVERTEXATTRIBI3UIPROC glad_glVertexAttribI3ui = NULL;
+PFNGLVERTEXATTRIBI3UIVPROC glad_glVertexAttribI3uiv = NULL;
+PFNGLVERTEXATTRIBI4BVPROC glad_glVertexAttribI4bv = NULL;
+PFNGLVERTEXATTRIBI4IPROC glad_glVertexAttribI4i = NULL;
+PFNGLVERTEXATTRIBI4IVPROC glad_glVertexAttribI4iv = NULL;
+PFNGLVERTEXATTRIBI4SVPROC glad_glVertexAttribI4sv = NULL;
+PFNGLVERTEXATTRIBI4UBVPROC glad_glVertexAttribI4ubv = NULL;
+PFNGLVERTEXATTRIBI4UIPROC glad_glVertexAttribI4ui = NULL;
+PFNGLVERTEXATTRIBI4UIVPROC glad_glVertexAttribI4uiv = NULL;
+PFNGLVERTEXATTRIBI4USVPROC glad_glVertexAttribI4usv = NULL;
+PFNGLVERTEXATTRIBIFORMATPROC glad_glVertexAttribIFormat = NULL;
+PFNGLVERTEXATTRIBIPOINTERPROC glad_glVertexAttribIPointer = NULL;
+PFNGLVERTEXATTRIBL1DPROC glad_glVertexAttribL1d = NULL;
+PFNGLVERTEXATTRIBL1DVPROC glad_glVertexAttribL1dv = NULL;
+PFNGLVERTEXATTRIBL2DPROC glad_glVertexAttribL2d = NULL;
+PFNGLVERTEXATTRIBL2DVPROC glad_glVertexAttribL2dv = NULL;
+PFNGLVERTEXATTRIBL3DPROC glad_glVertexAttribL3d = NULL;
+PFNGLVERTEXATTRIBL3DVPROC glad_glVertexAttribL3dv = NULL;
+PFNGLVERTEXATTRIBL4DPROC glad_glVertexAttribL4d = NULL;
+PFNGLVERTEXATTRIBL4DVPROC glad_glVertexAttribL4dv = NULL;
+PFNGLVERTEXATTRIBLFORMATPROC glad_glVertexAttribLFormat = NULL;
+PFNGLVERTEXATTRIBLPOINTERPROC glad_glVertexAttribLPointer = NULL;
+PFNGLVERTEXATTRIBP1UIPROC glad_glVertexAttribP1ui = NULL;
+PFNGLVERTEXATTRIBP1UIVPROC glad_glVertexAttribP1uiv = NULL;
+PFNGLVERTEXATTRIBP2UIPROC glad_glVertexAttribP2ui = NULL;
+PFNGLVERTEXATTRIBP2UIVPROC glad_glVertexAttribP2uiv = NULL;
+PFNGLVERTEXATTRIBP3UIPROC glad_glVertexAttribP3ui = NULL;
+PFNGLVERTEXATTRIBP3UIVPROC glad_glVertexAttribP3uiv = NULL;
+PFNGLVERTEXATTRIBP4UIPROC glad_glVertexAttribP4ui = NULL;
+PFNGLVERTEXATTRIBP4UIVPROC glad_glVertexAttribP4uiv = NULL;
+PFNGLVERTEXATTRIBPOINTERPROC glad_glVertexAttribPointer = NULL;
+PFNGLVERTEXBINDINGDIVISORPROC glad_glVertexBindingDivisor = NULL;
+PFNGLVERTEXP2UIPROC glad_glVertexP2ui = NULL;
+PFNGLVERTEXP2UIVPROC glad_glVertexP2uiv = NULL;
+PFNGLVERTEXP3UIPROC glad_glVertexP3ui = NULL;
+PFNGLVERTEXP3UIVPROC glad_glVertexP3uiv = NULL;
+PFNGLVERTEXP4UIPROC glad_glVertexP4ui = NULL;
+PFNGLVERTEXP4UIVPROC glad_glVertexP4uiv = NULL;
+PFNGLVIEWPORTPROC glad_glViewport = NULL;
+PFNGLVIEWPORTARRAYVPROC glad_glViewportArrayv = NULL;
+PFNGLVIEWPORTINDEXEDFPROC glad_glViewportIndexedf = NULL;
+PFNGLVIEWPORTINDEXEDFVPROC glad_glViewportIndexedfv = NULL;
+PFNGLWAITSYNCPROC glad_glWaitSync = NULL;
+static void load_GL_VERSION_1_0(GLADloadproc load) {
+        if(!GLAD_GL_VERSION_1_0) return;
+        glad_glCullFace = (PFNGLCULLFACEPROC)load("glCullFace");
+        glad_glFrontFace = (PFNGLFRONTFACEPROC)load("glFrontFace");
+        glad_glHint = (PFNGLHINTPROC)load("glHint");
+        glad_glLineWidth = (PFNGLLINEWIDTHPROC)load("glLineWidth");
+        glad_glPointSize = (PFNGLPOINTSIZEPROC)load("glPointSize");
+        glad_glPolygonMode = (PFNGLPOLYGONMODEPROC)load("glPolygonMode");
+        glad_glScissor = (PFNGLSCISSORPROC)load("glScissor");
+        glad_glTexParameterf = (PFNGLTEXPARAMETERFPROC)load("glTexParameterf");
+        glad_glTexParameterfv = (PFNGLTEXPARAMETERFVPROC)load("glTexParameterfv");
+        glad_glTexParameteri = (PFNGLTEXPARAMETERIPROC)load("glTexParameteri");
+        glad_glTexParameteriv = (PFNGLTEXPARAMETERIVPROC)load("glTexParameteriv");
+        glad_glTexImage1D = (PFNGLTEXIMAGE1DPROC)load("glTexImage1D");
+        glad_glTexImage2D = (PFNGLTEXIMAGE2DPROC)load("glTexImage2D");
+        glad_glDrawBuffer = (PFNGLDRAWBUFFERPROC)load("glDrawBuffer");
+        glad_glClear = (PFNGLCLEARPROC)load("glClear");
+        glad_glClearColor = (PFNGLCLEARCOLORPROC)load("glClearColor");
+        glad_glClearStencil = (PFNGLCLEARSTENCILPROC)load("glClearStencil");
+        glad_glClearDepth = (PFNGLCLEARDEPTHPROC)load("glClearDepth");
+        glad_glStencilMask = (PFNGLSTENCILMASKPROC)load("glStencilMask");
+        glad_glColorMask = (PFNGLCOLORMASKPROC)load("glColorMask");
+        glad_glDepthMask = (PFNGLDEPTHMASKPROC)load("glDepthMask");
+        glad_glDisable = (PFNGLDISABLEPROC)load("glDisable");
+        glad_glEnable = (PFNGLENABLEPROC)load("glEnable");
+        glad_glFinish = (PFNGLFINISHPROC)load("glFinish");
+        glad_glFlush = (PFNGLFLUSHPROC)load("glFlush");
+        glad_glBlendFunc = (PFNGLBLENDFUNCPROC)load("glBlendFunc");
+        glad_glLogicOp = (PFNGLLOGICOPPROC)load("glLogicOp");
+        glad_glStencilFunc = (PFNGLSTENCILFUNCPROC)load("glStencilFunc");
+        glad_glStencilOp = (PFNGLSTENCILOPPROC)load("glStencilOp");
+        glad_glDepthFunc = (PFNGLDEPTHFUNCPROC)load("glDepthFunc");
+        glad_glPixelStoref = (PFNGLPIXELSTOREFPROC)load("glPixelStoref");
+        glad_glPixelStorei = (PFNGLPIXELSTOREIPROC)load("glPixelStorei");
+        glad_glReadBuffer = (PFNGLREADBUFFERPROC)load("glReadBuffer");
+        glad_glReadPixels = (PFNGLREADPIXELSPROC)load("glReadPixels");
+        glad_glGetBooleanv = (PFNGLGETBOOLEANVPROC)load("glGetBooleanv");
+        glad_glGetDoublev = (PFNGLGETDOUBLEVPROC)load("glGetDoublev");
+        glad_glGetError = (PFNGLGETERRORPROC)load("glGetError");
+        glad_glGetFloatv = (PFNGLGETFLOATVPROC)load("glGetFloatv");
+        glad_glGetIntegerv = (PFNGLGETINTEGERVPROC)load("glGetIntegerv");
+        glad_glGetString = (PFNGLGETSTRINGPROC)load("glGetString");
+        glad_glGetTexImage = (PFNGLGETTEXIMAGEPROC)load("glGetTexImage");
+        glad_glGetTexParameterfv = (PFNGLGETTEXPARAMETERFVPROC)load("glGetTexParameterfv");
+        glad_glGetTexParameteriv = (PFNGLGETTEXPARAMETERIVPROC)load("glGetTexParameteriv");
+        glad_glGetTexLevelParameterfv = (PFNGLGETTEXLEVELPARAMETERFVPROC)load("glGetTexLevelParameterfv");
+        glad_glGetTexLevelParameteriv = (PFNGLGETTEXLEVELPARAMETERIVPROC)load("glGetTexLevelParameteriv");
+        glad_glIsEnabled = (PFNGLISENABLEDPROC)load("glIsEnabled");
+        glad_glDepthRange = (PFNGLDEPTHRANGEPROC)load("glDepthRange");
+        glad_glViewport = (PFNGLVIEWPORTPROC)load("glViewport");
+}
+static void load_GL_VERSION_1_1(GLADloadproc load) {
+        if(!GLAD_GL_VERSION_1_1) return;
+        glad_glDrawArrays = (PFNGLDRAWARRAYSPROC)load("glDrawArrays");
+        glad_glDrawElements = (PFNGLDRAWELEMENTSPROC)load("glDrawElements");
+        glad_glPolygonOffset = (PFNGLPOLYGONOFFSETPROC)load("glPolygonOffset");
+        glad_glCopyTexImage1D = (PFNGLCOPYTEXIMAGE1DPROC)load("glCopyTexImage1D");
+        glad_glCopyTexImage2D = (PFNGLCOPYTEXIMAGE2DPROC)load("glCopyTexImage2D");
+        glad_glCopyTexSubImage1D = (PFNGLCOPYTEXSUBIMAGE1DPROC)load("glCopyTexSubImage1D");
+        glad_glCopyTexSubImage2D = (PFNGLCOPYTEXSUBIMAGE2DPROC)load("glCopyTexSubImage2D");
+        glad_glTexSubImage1D = (PFNGLTEXSUBIMAGE1DPROC)load("glTexSubImage1D");
+        glad_glTexSubImage2D = (PFNGLTEXSUBIMAGE2DPROC)load("glTexSubImage2D");
+        glad_glBindTexture = (PFNGLBINDTEXTUREPROC)load("glBindTexture");
+        glad_glDeleteTextures = (PFNGLDELETETEXTURESPROC)load("glDeleteTextures");
+        glad_glGenTextures = (PFNGLGENTEXTURESPROC)load("glGenTextures");
+        glad_glIsTexture = (PFNGLISTEXTUREPROC)load("glIsTexture");
+}
+static void load_GL_VERSION_1_2(GLADloadproc load) {
+        if(!GLAD_GL_VERSION_1_2) return;
+        glad_glDrawRangeElements = (PFNGLDRAWRANGEELEMENTSPROC)load("glDrawRangeElements");
+        glad_glTexImage3D = (PFNGLTEXIMAGE3DPROC)load("glTexImage3D");
+        glad_glTexSubImage3D = (PFNGLTEXSUBIMAGE3DPROC)load("glTexSubImage3D");
+        glad_glCopyTexSubImage3D = (PFNGLCOPYTEXSUBIMAGE3DPROC)load("glCopyTexSubImage3D");
+}
+static void load_GL_VERSION_1_3(GLADloadproc load) {
+        if(!GLAD_GL_VERSION_1_3) return;
+        glad_glActiveTexture = (PFNGLACTIVETEXTUREPROC)load("glActiveTexture");
+        glad_glSampleCoverage = (PFNGLSAMPLECOVERAGEPROC)load("glSampleCoverage");
+        glad_glCompressedTexImage3D = (PFNGLCOMPRESSEDTEXIMAGE3DPROC)load("glCompressedTexImage3D");
+        glad_glCompressedTexImage2D = (PFNGLCOMPRESSEDTEXIMAGE2DPROC)load("glCompressedTexImage2D");
+        glad_glCompressedTexImage1D = (PFNGLCOMPRESSEDTEXIMAGE1DPROC)load("glCompressedTexImage1D");
+        glad_glCompressedTexSubImage3D = (PFNGLCOMPRESSEDTEXSUBIMAGE3DPROC)load("glCompressedTexSubImage3D");
+        glad_glCompressedTexSubImage2D = (PFNGLCOMPRESSEDTEXSUBIMAGE2DPROC)load("glCompressedTexSubImage2D");
+        glad_glCompressedTexSubImage1D = (PFNGLCOMPRESSEDTEXSUBIMAGE1DPROC)load("glCompressedTexSubImage1D");
+        glad_glGetCompressedTexImage = (PFNGLGETCOMPRESSEDTEXIMAGEPROC)load("glGetCompressedTexImage");
+}
+static void load_GL_VERSION_1_4(GLADloadproc load) {
+        if(!GLAD_GL_VERSION_1_4) return;
+        glad_glBlendFuncSeparate = (PFNGLBLENDFUNCSEPARATEPROC)load("glBlendFuncSeparate");
+        glad_glMultiDrawArrays = (PFNGLMULTIDRAWARRAYSPROC)load("glMultiDrawArrays");
+        glad_glMultiDrawElements = (PFNGLMULTIDRAWELEMENTSPROC)load("glMultiDrawElements");
+        glad_glPointParameterf = (PFNGLPOINTPARAMETERFPROC)load("glPointParameterf");
+        glad_glPointParameterfv = (PFNGLPOINTPARAMETERFVPROC)load("glPointParameterfv");
+        glad_glPointParameteri = (PFNGLPOINTPARAMETERIPROC)load("glPointParameteri");
+        glad_glPointParameteriv = (PFNGLPOINTPARAMETERIVPROC)load("glPointParameteriv");
+        glad_glBlendColor = (PFNGLBLENDCOLORPROC)load("glBlendColor");
+        glad_glBlendEquation = (PFNGLBLENDEQUATIONPROC)load("glBlendEquation");
+}
+static void load_GL_VERSION_1_5(GLADloadproc load) {
+        if(!GLAD_GL_VERSION_1_5) return;
+        glad_glGenQueries = (PFNGLGENQUERIESPROC)load("glGenQueries");
+        glad_glDeleteQueries = (PFNGLDELETEQUERIESPROC)load("glDeleteQueries");
+        glad_glIsQuery = (PFNGLISQUERYPROC)load("glIsQuery");
+        glad_glBeginQuery = (PFNGLBEGINQUERYPROC)load("glBeginQuery");
+        glad_glEndQuery = (PFNGLENDQUERYPROC)load("glEndQuery");
+        glad_glGetQueryiv = (PFNGLGETQUERYIVPROC)load("glGetQueryiv");
+        glad_glGetQueryObjectiv = (PFNGLGETQUERYOBJECTIVPROC)load("glGetQueryObjectiv");
+        glad_glGetQueryObjectuiv = (PFNGLGETQUERYOBJECTUIVPROC)load("glGetQueryObjectuiv");
+        glad_glBindBuffer = (PFNGLBINDBUFFERPROC)load("glBindBuffer");
+        glad_glDeleteBuffers = (PFNGLDELETEBUFFERSPROC)load("glDeleteBuffers");
+        glad_glGenBuffers = (PFNGLGENBUFFERSPROC)load("glGenBuffers");
+        glad_glIsBuffer = (PFNGLISBUFFERPROC)load("glIsBuffer");
+        glad_glBufferData = (PFNGLBUFFERDATAPROC)load("glBufferData");
+        glad_glBufferSubData = (PFNGLBUFFERSUBDATAPROC)load("glBufferSubData");
+        glad_glGetBufferSubData = (PFNGLGETBUFFERSUBDATAPROC)load("glGetBufferSubData");
+        glad_glMapBuffer = (PFNGLMAPBUFFERPROC)load("glMapBuffer");
+        glad_glUnmapBuffer = (PFNGLUNMAPBUFFERPROC)load("glUnmapBuffer");
+        glad_glGetBufferParameteriv = (PFNGLGETBUFFERPARAMETERIVPROC)load("glGetBufferParameteriv");
+        glad_glGetBufferPointerv = (PFNGLGETBUFFERPOINTERVPROC)load("glGetBufferPointerv");
+}
+static void load_GL_VERSION_2_0(GLADloadproc load) {
+        if(!GLAD_GL_VERSION_2_0) return;
+        glad_glBlendEquationSeparate = (PFNGLBLENDEQUATIONSEPARATEPROC)load("glBlendEquationSeparate");
+        glad_glDrawBuffers = (PFNGLDRAWBUFFERSPROC)load("glDrawBuffers");
+        glad_glStencilOpSeparate = (PFNGLSTENCILOPSEPARATEPROC)load("glStencilOpSeparate");
+        glad_glStencilFuncSeparate = (PFNGLSTENCILFUNCSEPARATEPROC)load("glStencilFuncSeparate");
+        glad_glStencilMaskSeparate = (PFNGLSTENCILMASKSEPARATEPROC)load("glStencilMaskSeparate");
+        glad_glAttachShader = (PFNGLATTACHSHADERPROC)load("glAttachShader");
+        glad_glBindAttribLocation = (PFNGLBINDATTRIBLOCATIONPROC)load("glBindAttribLocation");
+        glad_glCompileShader = (PFNGLCOMPILESHADERPROC)load("glCompileShader");
+        glad_glCreateProgram = (PFNGLCREATEPROGRAMPROC)load("glCreateProgram");
+        glad_glCreateShader = (PFNGLCREATESHADERPROC)load("glCreateShader");
+        glad_glDeleteProgram = (PFNGLDELETEPROGRAMPROC)load("glDeleteProgram");
+        glad_glDeleteShader = (PFNGLDELETESHADERPROC)load("glDeleteShader");
+        glad_glDetachShader = (PFNGLDETACHSHADERPROC)load("glDetachShader");
+        glad_glDisableVertexAttribArray = (PFNGLDISABLEVERTEXATTRIBARRAYPROC)load("glDisableVertexAttribArray");
+        glad_glEnableVertexAttribArray = (PFNGLENABLEVERTEXATTRIBARRAYPROC)load("glEnableVertexAttribArray");
+        glad_glGetActiveAttrib = (PFNGLGETACTIVEATTRIBPROC)load("glGetActiveAttrib");
+        glad_glGetActiveUniform = (PFNGLGETACTIVEUNIFORMPROC)load("glGetActiveUniform");
+        glad_glGetAttachedShaders = (PFNGLGETATTACHEDSHADERSPROC)load("glGetAttachedShaders");
+        glad_glGetAttribLocation = (PFNGLGETATTRIBLOCATIONPROC)load("glGetAttribLocation");
+        glad_glGetProgramiv = (PFNGLGETPROGRAMIVPROC)load("glGetProgramiv");
+        glad_glGetProgramInfoLog = (PFNGLGETPROGRAMINFOLOGPROC)load("glGetProgramInfoLog");
+        glad_glGetShaderiv = (PFNGLGETSHADERIVPROC)load("glGetShaderiv");
+        glad_glGetShaderInfoLog = (PFNGLGETSHADERINFOLOGPROC)load("glGetShaderInfoLog");
+        glad_glGetShaderSource = (PFNGLGETSHADERSOURCEPROC)load("glGetShaderSource");
+        glad_glGetUniformLocation = (PFNGLGETUNIFORMLOCATIONPROC)load("glGetUniformLocation");
+        glad_glGetUniformfv = (PFNGLGETUNIFORMFVPROC)load("glGetUniformfv");
+        glad_glGetUniformiv = (PFNGLGETUNIFORMIVPROC)load("glGetUniformiv");
+        glad_glGetVertexAttribdv = (PFNGLGETVERTEXATTRIBDVPROC)load("glGetVertexAttribdv");
+        glad_glGetVertexAttribfv = (PFNGLGETVERTEXATTRIBFVPROC)load("glGetVertexAttribfv");
+        glad_glGetVertexAttribiv = (PFNGLGETVERTEXATTRIBIVPROC)load("glGetVertexAttribiv");
+        glad_glGetVertexAttribPointerv = (PFNGLGETVERTEXATTRIBPOINTERVPROC)load("glGetVertexAttribPointerv");
+        glad_glIsProgram = (PFNGLISPROGRAMPROC)load("glIsProgram");
+        glad_glIsShader = (PFNGLISSHADERPROC)load("glIsShader");
+        glad_glLinkProgram = (PFNGLLINKPROGRAMPROC)load("glLinkProgram");
+        glad_glShaderSource = (PFNGLSHADERSOURCEPROC)load("glShaderSource");
+        glad_glUseProgram = (PFNGLUSEPROGRAMPROC)load("glUseProgram");
+        glad_glUniform1f = (PFNGLUNIFORM1FPROC)load("glUniform1f");
+        glad_glUniform2f = (PFNGLUNIFORM2FPROC)load("glUniform2f");
+        glad_glUniform3f = (PFNGLUNIFORM3FPROC)load("glUniform3f");
+        glad_glUniform4f = (PFNGLUNIFORM4FPROC)load("glUniform4f");
+        glad_glUniform1i = (PFNGLUNIFORM1IPROC)load("glUniform1i");
+        glad_glUniform2i = (PFNGLUNIFORM2IPROC)load("glUniform2i");
+        glad_glUniform3i = (PFNGLUNIFORM3IPROC)load("glUniform3i");
+        glad_glUniform4i = (PFNGLUNIFORM4IPROC)load("glUniform4i");
+        glad_glUniform1fv = (PFNGLUNIFORM1FVPROC)load("glUniform1fv");
+        glad_glUniform2fv = (PFNGLUNIFORM2FVPROC)load("glUniform2fv");
+        glad_glUniform3fv = (PFNGLUNIFORM3FVPROC)load("glUniform3fv");
+        glad_glUniform4fv = (PFNGLUNIFORM4FVPROC)load("glUniform4fv");
+        glad_glUniform1iv = (PFNGLUNIFORM1IVPROC)load("glUniform1iv");
+        glad_glUniform2iv = (PFNGLUNIFORM2IVPROC)load("glUniform2iv");
+        glad_glUniform3iv = (PFNGLUNIFORM3IVPROC)load("glUniform3iv");
+        glad_glUniform4iv = (PFNGLUNIFORM4IVPROC)load("glUniform4iv");
+        glad_glUniformMatrix2fv = (PFNGLUNIFORMMATRIX2FVPROC)load("glUniformMatrix2fv");
+        glad_glUniformMatrix3fv = (PFNGLUNIFORMMATRIX3FVPROC)load("glUniformMatrix3fv");
+        glad_glUniformMatrix4fv = (PFNGLUNIFORMMATRIX4FVPROC)load("glUniformMatrix4fv");
+        glad_glValidateProgram = (PFNGLVALIDATEPROGRAMPROC)load("glValidateProgram");
+        glad_glVertexAttrib1d = (PFNGLVERTEXATTRIB1DPROC)load("glVertexAttrib1d");
+        glad_glVertexAttrib1dv = (PFNGLVERTEXATTRIB1DVPROC)load("glVertexAttrib1dv");
+        glad_glVertexAttrib1f = (PFNGLVERTEXATTRIB1FPROC)load("glVertexAttrib1f");
+        glad_glVertexAttrib1fv = (PFNGLVERTEXATTRIB1FVPROC)load("glVertexAttrib1fv");
+        glad_glVertexAttrib1s = (PFNGLVERTEXATTRIB1SPROC)load("glVertexAttrib1s");
+        glad_glVertexAttrib1sv = (PFNGLVERTEXATTRIB1SVPROC)load("glVertexAttrib1sv");
+        glad_glVertexAttrib2d = (PFNGLVERTEXATTRIB2DPROC)load("glVertexAttrib2d");
+        glad_glVertexAttrib2dv = (PFNGLVERTEXATTRIB2DVPROC)load("glVertexAttrib2dv");
+        glad_glVertexAttrib2f = (PFNGLVERTEXATTRIB2FPROC)load("glVertexAttrib2f");
+        glad_glVertexAttrib2fv = (PFNGLVERTEXATTRIB2FVPROC)load("glVertexAttrib2fv");
+        glad_glVertexAttrib2s = (PFNGLVERTEXATTRIB2SPROC)load("glVertexAttrib2s");
+        glad_glVertexAttrib2sv = (PFNGLVERTEXATTRIB2SVPROC)load("glVertexAttrib2sv");
+        glad_glVertexAttrib3d = (PFNGLVERTEXATTRIB3DPROC)load("glVertexAttrib3d");
+        glad_glVertexAttrib3dv = (PFNGLVERTEXATTRIB3DVPROC)load("glVertexAttrib3dv");
+        glad_glVertexAttrib3f = (PFNGLVERTEXATTRIB3FPROC)load("glVertexAttrib3f");
+        glad_glVertexAttrib3fv = (PFNGLVERTEXATTRIB3FVPROC)load("glVertexAttrib3fv");
+        glad_glVertexAttrib3s = (PFNGLVERTEXATTRIB3SPROC)load("glVertexAttrib3s");
+        glad_glVertexAttrib3sv = (PFNGLVERTEXATTRIB3SVPROC)load("glVertexAttrib3sv");
+        glad_glVertexAttrib4Nbv = (PFNGLVERTEXATTRIB4NBVPROC)load("glVertexAttrib4Nbv");
+        glad_glVertexAttrib4Niv = (PFNGLVERTEXATTRIB4NIVPROC)load("glVertexAttrib4Niv");
+        glad_glVertexAttrib4Nsv = (PFNGLVERTEXATTRIB4NSVPROC)load("glVertexAttrib4Nsv");
+        glad_glVertexAttrib4Nub = (PFNGLVERTEXATTRIB4NUBPROC)load("glVertexAttrib4Nub");
+        glad_glVertexAttrib4Nubv = (PFNGLVERTEXATTRIB4NUBVPROC)load("glVertexAttrib4Nubv");
+        glad_glVertexAttrib4Nuiv = (PFNGLVERTEXATTRIB4NUIVPROC)load("glVertexAttrib4Nuiv");
+        glad_glVertexAttrib4Nusv = (PFNGLVERTEXATTRIB4NUSVPROC)load("glVertexAttrib4Nusv");
+        glad_glVertexAttrib4bv = (PFNGLVERTEXATTRIB4BVPROC)load("glVertexAttrib4bv");
+        glad_glVertexAttrib4d = (PFNGLVERTEXATTRIB4DPROC)load("glVertexAttrib4d");
+        glad_glVertexAttrib4dv = (PFNGLVERTEXATTRIB4DVPROC)load("glVertexAttrib4dv");
+        glad_glVertexAttrib4f = (PFNGLVERTEXATTRIB4FPROC)load("glVertexAttrib4f");
+        glad_glVertexAttrib4fv = (PFNGLVERTEXATTRIB4FVPROC)load("glVertexAttrib4fv");
+        glad_glVertexAttrib4iv = (PFNGLVERTEXATTRIB4IVPROC)load("glVertexAttrib4iv");
+        glad_glVertexAttrib4s = (PFNGLVERTEXATTRIB4SPROC)load("glVertexAttrib4s");
+        glad_glVertexAttrib4sv = (PFNGLVERTEXATTRIB4SVPROC)load("glVertexAttrib4sv");
+        glad_glVertexAttrib4ubv = (PFNGLVERTEXATTRIB4UBVPROC)load("glVertexAttrib4ubv");
+        glad_glVertexAttrib4uiv = (PFNGLVERTEXATTRIB4UIVPROC)load("glVertexAttrib4uiv");
+        glad_glVertexAttrib4usv = (PFNGLVERTEXATTRIB4USVPROC)load("glVertexAttrib4usv");
+        glad_glVertexAttribPointer = (PFNGLVERTEXATTRIBPOINTERPROC)load("glVertexAttribPointer");
+}
+static void load_GL_VERSION_2_1(GLADloadproc load) {
+        if(!GLAD_GL_VERSION_2_1) return;
+        glad_glUniformMatrix2x3fv = (PFNGLUNIFORMMATRIX2X3FVPROC)load("glUniformMatrix2x3fv");
+        glad_glUniformMatrix3x2fv = (PFNGLUNIFORMMATRIX3X2FVPROC)load("glUniformMatrix3x2fv");
+        glad_glUniformMatrix2x4fv = (PFNGLUNIFORMMATRIX2X4FVPROC)load("glUniformMatrix2x4fv");
+        glad_glUniformMatrix4x2fv = (PFNGLUNIFORMMATRIX4X2FVPROC)load("glUniformMatrix4x2fv");
+        glad_glUniformMatrix3x4fv = (PFNGLUNIFORMMATRIX3X4FVPROC)load("glUniformMatrix3x4fv");
+        glad_glUniformMatrix4x3fv = (PFNGLUNIFORMMATRIX4X3FVPROC)load("glUniformMatrix4x3fv");
+}
+static void load_GL_VERSION_3_0(GLADloadproc load) {
+        if(!GLAD_GL_VERSION_3_0) return;
+        glad_glColorMaski = (PFNGLCOLORMASKIPROC)load("glColorMaski");
+        glad_glGetBooleani_v = (PFNGLGETBOOLEANI_VPROC)load("glGetBooleani_v");
+        glad_glGetIntegeri_v = (PFNGLGETINTEGERI_VPROC)load("glGetIntegeri_v");
+        glad_glEnablei = (PFNGLENABLEIPROC)load("glEnablei");
+        glad_glDisablei = (PFNGLDISABLEIPROC)load("glDisablei");
+        glad_glIsEnabledi = (PFNGLISENABLEDIPROC)load("glIsEnabledi");
+        glad_glBeginTransformFeedback = (PFNGLBEGINTRANSFORMFEEDBACKPROC)load("glBeginTransformFeedback");
+        glad_glEndTransformFeedback = (PFNGLENDTRANSFORMFEEDBACKPROC)load("glEndTransformFeedback");
+        glad_glBindBufferRange = (PFNGLBINDBUFFERRANGEPROC)load("glBindBufferRange");
+        glad_glBindBufferBase = (PFNGLBINDBUFFERBASEPROC)load("glBindBufferBase");
+        glad_glTransformFeedbackVaryings = (PFNGLTRANSFORMFEEDBACKVARYINGSPROC)load("glTransformFeedbackVaryings");
+        glad_glGetTransformFeedbackVarying = (PFNGLGETTRANSFORMFEEDBACKVARYINGPROC)load("glGetTransformFeedbackVarying");
+        glad_glClampColor = (PFNGLCLAMPCOLORPROC)load("glClampColor");
+        glad_glBeginConditionalRender = (PFNGLBEGINCONDITIONALRENDERPROC)load("glBeginConditionalRender");
+        glad_glEndConditionalRender = (PFNGLENDCONDITIONALRENDERPROC)load("glEndConditionalRender");
+        glad_glVertexAttribIPointer = (PFNGLVERTEXATTRIBIPOINTERPROC)load("glVertexAttribIPointer");
+        glad_glGetVertexAttribIiv = (PFNGLGETVERTEXATTRIBIIVPROC)load("glGetVertexAttribIiv");
+        glad_glGetVertexAttribIuiv = (PFNGLGETVERTEXATTRIBIUIVPROC)load("glGetVertexAttribIuiv");
+        glad_glVertexAttribI1i = (PFNGLVERTEXATTRIBI1IPROC)load("glVertexAttribI1i");
+        glad_glVertexAttribI2i = (PFNGLVERTEXATTRIBI2IPROC)load("glVertexAttribI2i");
+        glad_glVertexAttribI3i = (PFNGLVERTEXATTRIBI3IPROC)load("glVertexAttribI3i");
+        glad_glVertexAttribI4i = (PFNGLVERTEXATTRIBI4IPROC)load("glVertexAttribI4i");
+        glad_glVertexAttribI1ui = (PFNGLVERTEXATTRIBI1UIPROC)load("glVertexAttribI1ui");
+        glad_glVertexAttribI2ui = (PFNGLVERTEXATTRIBI2UIPROC)load("glVertexAttribI2ui");
+        glad_glVertexAttribI3ui = (PFNGLVERTEXATTRIBI3UIPROC)load("glVertexAttribI3ui");
+        glad_glVertexAttribI4ui = (PFNGLVERTEXATTRIBI4UIPROC)load("glVertexAttribI4ui");
+        glad_glVertexAttribI1iv = (PFNGLVERTEXATTRIBI1IVPROC)load("glVertexAttribI1iv");
+        glad_glVertexAttribI2iv = (PFNGLVERTEXATTRIBI2IVPROC)load("glVertexAttribI2iv");
+        glad_glVertexAttribI3iv = (PFNGLVERTEXATTRIBI3IVPROC)load("glVertexAttribI3iv");
+        glad_glVertexAttribI4iv = (PFNGLVERTEXATTRIBI4IVPROC)load("glVertexAttribI4iv");
+        glad_glVertexAttribI1uiv = (PFNGLVERTEXATTRIBI1UIVPROC)load("glVertexAttribI1uiv");
+        glad_glVertexAttribI2uiv = (PFNGLVERTEXATTRIBI2UIVPROC)load("glVertexAttribI2uiv");
+        glad_glVertexAttribI3uiv = (PFNGLVERTEXATTRIBI3UIVPROC)load("glVertexAttribI3uiv");
+        glad_glVertexAttribI4uiv = (PFNGLVERTEXATTRIBI4UIVPROC)load("glVertexAttribI4uiv");
+        glad_glVertexAttribI4bv = (PFNGLVERTEXATTRIBI4BVPROC)load("glVertexAttribI4bv");
+        glad_glVertexAttribI4sv = (PFNGLVERTEXATTRIBI4SVPROC)load("glVertexAttribI4sv");
+        glad_glVertexAttribI4ubv = (PFNGLVERTEXATTRIBI4UBVPROC)load("glVertexAttribI4ubv");
+        glad_glVertexAttribI4usv = (PFNGLVERTEXATTRIBI4USVPROC)load("glVertexAttribI4usv");
+        glad_glGetUniformuiv = (PFNGLGETUNIFORMUIVPROC)load("glGetUniformuiv");
+        glad_glBindFragDataLocation = (PFNGLBINDFRAGDATALOCATIONPROC)load("glBindFragDataLocation");
+        glad_glGetFragDataLocation = (PFNGLGETFRAGDATALOCATIONPROC)load("glGetFragDataLocation");
+        glad_glUniform1ui = (PFNGLUNIFORM1UIPROC)load("glUniform1ui");
+        glad_glUniform2ui = (PFNGLUNIFORM2UIPROC)load("glUniform2ui");
+        glad_glUniform3ui = (PFNGLUNIFORM3UIPROC)load("glUniform3ui");
+        glad_glUniform4ui = (PFNGLUNIFORM4UIPROC)load("glUniform4ui");
+        glad_glUniform1uiv = (PFNGLUNIFORM1UIVPROC)load("glUniform1uiv");
+        glad_glUniform2uiv = (PFNGLUNIFORM2UIVPROC)load("glUniform2uiv");
+        glad_glUniform3uiv = (PFNGLUNIFORM3UIVPROC)load("glUniform3uiv");
+        glad_glUniform4uiv = (PFNGLUNIFORM4UIVPROC)load("glUniform4uiv");
+        glad_glTexParameterIiv = (PFNGLTEXPARAMETERIIVPROC)load("glTexParameterIiv");
+        glad_glTexParameterIuiv = (PFNGLTEXPARAMETERIUIVPROC)load("glTexParameterIuiv");
+        glad_glGetTexParameterIiv = (PFNGLGETTEXPARAMETERIIVPROC)load("glGetTexParameterIiv");
+        glad_glGetTexParameterIuiv = (PFNGLGETTEXPARAMETERIUIVPROC)load("glGetTexParameterIuiv");
+        glad_glClearBufferiv = (PFNGLCLEARBUFFERIVPROC)load("glClearBufferiv");
+        glad_glClearBufferuiv = (PFNGLCLEARBUFFERUIVPROC)load("glClearBufferuiv");
+        glad_glClearBufferfv = (PFNGLCLEARBUFFERFVPROC)load("glClearBufferfv");
+        glad_glClearBufferfi = (PFNGLCLEARBUFFERFIPROC)load("glClearBufferfi");
+        glad_glGetStringi = (PFNGLGETSTRINGIPROC)load("glGetStringi");
+        glad_glIsRenderbuffer = (PFNGLISRENDERBUFFERPROC)load("glIsRenderbuffer");
+        glad_glBindRenderbuffer = (PFNGLBINDRENDERBUFFERPROC)load("glBindRenderbuffer");
+        glad_glDeleteRenderbuffers = (PFNGLDELETERENDERBUFFERSPROC)load("glDeleteRenderbuffers");
+        glad_glGenRenderbuffers = (PFNGLGENRENDERBUFFERSPROC)load("glGenRenderbuffers");
+        glad_glRenderbufferStorage = (PFNGLRENDERBUFFERSTORAGEPROC)load("glRenderbufferStorage");
+        glad_glGetRenderbufferParameteriv = (PFNGLGETRENDERBUFFERPARAMETERIVPROC)load("glGetRenderbufferParameteriv");
+        glad_glIsFramebuffer = (PFNGLISFRAMEBUFFERPROC)load("glIsFramebuffer");
+        glad_glBindFramebuffer = (PFNGLBINDFRAMEBUFFERPROC)load("glBindFramebuffer");
+        glad_glDeleteFramebuffers = (PFNGLDELETEFRAMEBUFFERSPROC)load("glDeleteFramebuffers");
+        glad_glGenFramebuffers = (PFNGLGENFRAMEBUFFERSPROC)load("glGenFramebuffers");
+        glad_glCheckFramebufferStatus = (PFNGLCHECKFRAMEBUFFERSTATUSPROC)load("glCheckFramebufferStatus");
+        glad_glFramebufferTexture1D = (PFNGLFRAMEBUFFERTEXTURE1DPROC)load("glFramebufferTexture1D");
+        glad_glFramebufferTexture2D = (PFNGLFRAMEBUFFERTEXTURE2DPROC)load("glFramebufferTexture2D");
+        glad_glFramebufferTexture3D = (PFNGLFRAMEBUFFERTEXTURE3DPROC)load("glFramebufferTexture3D");
+        glad_glFramebufferRenderbuffer = (PFNGLFRAMEBUFFERRENDERBUFFERPROC)load("glFramebufferRenderbuffer");
+        glad_glGetFramebufferAttachmentParameteriv = (PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC)load("glGetFramebufferAttachmentParameteriv");
+        glad_glGenerateMipmap = (PFNGLGENERATEMIPMAPPROC)load("glGenerateMipmap");
+        glad_glBlitFramebuffer = (PFNGLBLITFRAMEBUFFERPROC)load("glBlitFramebuffer");
+        glad_glRenderbufferStorageMultisample = (PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC)load("glRenderbufferStorageMultisample");
+        glad_glFramebufferTextureLayer = (PFNGLFRAMEBUFFERTEXTURELAYERPROC)load("glFramebufferTextureLayer");
+        glad_glMapBufferRange = (PFNGLMAPBUFFERRANGEPROC)load("glMapBufferRange");
+        glad_glFlushMappedBufferRange = (PFNGLFLUSHMAPPEDBUFFERRANGEPROC)load("glFlushMappedBufferRange");
+        glad_glBindVertexArray = (PFNGLBINDVERTEXARRAYPROC)load("glBindVertexArray");
+        glad_glDeleteVertexArrays = (PFNGLDELETEVERTEXARRAYSPROC)load("glDeleteVertexArrays");
+        glad_glGenVertexArrays = (PFNGLGENVERTEXARRAYSPROC)load("glGenVertexArrays");
+        glad_glIsVertexArray = (PFNGLISVERTEXARRAYPROC)load("glIsVertexArray");
+}
+static void load_GL_VERSION_3_1(GLADloadproc load) {
+        if(!GLAD_GL_VERSION_3_1) return;
+        glad_glDrawArraysInstanced = (PFNGLDRAWARRAYSINSTANCEDPROC)load("glDrawArraysInstanced");
+        glad_glDrawElementsInstanced = (PFNGLDRAWELEMENTSINSTANCEDPROC)load("glDrawElementsInstanced");
+        glad_glTexBuffer = (PFNGLTEXBUFFERPROC)load("glTexBuffer");
+        glad_glPrimitiveRestartIndex = (PFNGLPRIMITIVERESTARTINDEXPROC)load("glPrimitiveRestartIndex");
+        glad_glCopyBufferSubData = (PFNGLCOPYBUFFERSUBDATAPROC)load("glCopyBufferSubData");
+        glad_glGetUniformIndices = (PFNGLGETUNIFORMINDICESPROC)load("glGetUniformIndices");
+        glad_glGetActiveUniformsiv = (PFNGLGETACTIVEUNIFORMSIVPROC)load("glGetActiveUniformsiv");
+        glad_glGetActiveUniformName = (PFNGLGETACTIVEUNIFORMNAMEPROC)load("glGetActiveUniformName");
+        glad_glGetUniformBlockIndex = (PFNGLGETUNIFORMBLOCKINDEXPROC)load("glGetUniformBlockIndex");
+        glad_glGetActiveUniformBlockiv = (PFNGLGETACTIVEUNIFORMBLOCKIVPROC)load("glGetActiveUniformBlockiv");
+        glad_glGetActiveUniformBlockName = (PFNGLGETACTIVEUNIFORMBLOCKNAMEPROC)load("glGetActiveUniformBlockName");
+        glad_glUniformBlockBinding = (PFNGLUNIFORMBLOCKBINDINGPROC)load("glUniformBlockBinding");
+        glad_glBindBufferRange = (PFNGLBINDBUFFERRANGEPROC)load("glBindBufferRange");
+        glad_glBindBufferBase = (PFNGLBINDBUFFERBASEPROC)load("glBindBufferBase");
+        glad_glGetIntegeri_v = (PFNGLGETINTEGERI_VPROC)load("glGetIntegeri_v");
+}
+static void load_GL_VERSION_3_2(GLADloadproc load) {
+        if(!GLAD_GL_VERSION_3_2) return;
+        glad_glDrawElementsBaseVertex = (PFNGLDRAWELEMENTSBASEVERTEXPROC)load("glDrawElementsBaseVertex");
+        glad_glDrawRangeElementsBaseVertex = (PFNGLDRAWRANGEELEMENTSBASEVERTEXPROC)load("glDrawRangeElementsBaseVertex");
+        glad_glDrawElementsInstancedBaseVertex = (PFNGLDRAWELEMENTSINSTANCEDBASEVERTEXPROC)load("glDrawElementsInstancedBaseVertex");
+        glad_glMultiDrawElementsBaseVertex = (PFNGLMULTIDRAWELEMENTSBASEVERTEXPROC)load("glMultiDrawElementsBaseVertex");
+        glad_glProvokingVertex = (PFNGLPROVOKINGVERTEXPROC)load("glProvokingVertex");
+        glad_glFenceSync = (PFNGLFENCESYNCPROC)load("glFenceSync");
+        glad_glIsSync = (PFNGLISSYNCPROC)load("glIsSync");
+        glad_glDeleteSync = (PFNGLDELETESYNCPROC)load("glDeleteSync");
+        glad_glClientWaitSync = (PFNGLCLIENTWAITSYNCPROC)load("glClientWaitSync");
+        glad_glWaitSync = (PFNGLWAITSYNCPROC)load("glWaitSync");
+        glad_glGetInteger64v = (PFNGLGETINTEGER64VPROC)load("glGetInteger64v");
+        glad_glGetSynciv = (PFNGLGETSYNCIVPROC)load("glGetSynciv");
+        glad_glGetInteger64i_v = (PFNGLGETINTEGER64I_VPROC)load("glGetInteger64i_v");
+        glad_glGetBufferParameteri64v = (PFNGLGETBUFFERPARAMETERI64VPROC)load("glGetBufferParameteri64v");
+        glad_glFramebufferTexture = (PFNGLFRAMEBUFFERTEXTUREPROC)load("glFramebufferTexture");
+        glad_glTexImage2DMultisample = (PFNGLTEXIMAGE2DMULTISAMPLEPROC)load("glTexImage2DMultisample");
+        glad_glTexImage3DMultisample = (PFNGLTEXIMAGE3DMULTISAMPLEPROC)load("glTexImage3DMultisample");
+        glad_glGetMultisamplefv = (PFNGLGETMULTISAMPLEFVPROC)load("glGetMultisamplefv");
+        glad_glSampleMaski = (PFNGLSAMPLEMASKIPROC)load("glSampleMaski");
+}
+static void load_GL_VERSION_3_3(GLADloadproc load) {
+        if(!GLAD_GL_VERSION_3_3) return;
+        glad_glBindFragDataLocationIndexed = (PFNGLBINDFRAGDATALOCATIONINDEXEDPROC)load("glBindFragDataLocationIndexed");
+        glad_glGetFragDataIndex = (PFNGLGETFRAGDATAINDEXPROC)load("glGetFragDataIndex");
+        glad_glGenSamplers = (PFNGLGENSAMPLERSPROC)load("glGenSamplers");
+        glad_glDeleteSamplers = (PFNGLDELETESAMPLERSPROC)load("glDeleteSamplers");
+        glad_glIsSampler = (PFNGLISSAMPLERPROC)load("glIsSampler");
+        glad_glBindSampler = (PFNGLBINDSAMPLERPROC)load("glBindSampler");
+        glad_glSamplerParameteri = (PFNGLSAMPLERPARAMETERIPROC)load("glSamplerParameteri");
+        glad_glSamplerParameteriv = (PFNGLSAMPLERPARAMETERIVPROC)load("glSamplerParameteriv");
+        glad_glSamplerParameterf = (PFNGLSAMPLERPARAMETERFPROC)load("glSamplerParameterf");
+        glad_glSamplerParameterfv = (PFNGLSAMPLERPARAMETERFVPROC)load("glSamplerParameterfv");
+        glad_glSamplerParameterIiv = (PFNGLSAMPLERPARAMETERIIVPROC)load("glSamplerParameterIiv");
+        glad_glSamplerParameterIuiv = (PFNGLSAMPLERPARAMETERIUIVPROC)load("glSamplerParameterIuiv");
+        glad_glGetSamplerParameteriv = (PFNGLGETSAMPLERPARAMETERIVPROC)load("glGetSamplerParameteriv");
+        glad_glGetSamplerParameterIiv = (PFNGLGETSAMPLERPARAMETERIIVPROC)load("glGetSamplerParameterIiv");
+        glad_glGetSamplerParameterfv = (PFNGLGETSAMPLERPARAMETERFVPROC)load("glGetSamplerParameterfv");
+        glad_glGetSamplerParameterIuiv = (PFNGLGETSAMPLERPARAMETERIUIVPROC)load("glGetSamplerParameterIuiv");
+        glad_glQueryCounter = (PFNGLQUERYCOUNTERPROC)load("glQueryCounter");
+        glad_glGetQueryObjecti64v = (PFNGLGETQUERYOBJECTI64VPROC)load("glGetQueryObjecti64v");
+        glad_glGetQueryObjectui64v = (PFNGLGETQUERYOBJECTUI64VPROC)load("glGetQueryObjectui64v");
+        glad_glVertexAttribDivisor = (PFNGLVERTEXATTRIBDIVISORPROC)load("glVertexAttribDivisor");
+        glad_glVertexAttribP1ui = (PFNGLVERTEXATTRIBP1UIPROC)load("glVertexAttribP1ui");
+        glad_glVertexAttribP1uiv = (PFNGLVERTEXATTRIBP1UIVPROC)load("glVertexAttribP1uiv");
+        glad_glVertexAttribP2ui = (PFNGLVERTEXATTRIBP2UIPROC)load("glVertexAttribP2ui");
+        glad_glVertexAttribP2uiv = (PFNGLVERTEXATTRIBP2UIVPROC)load("glVertexAttribP2uiv");
+        glad_glVertexAttribP3ui = (PFNGLVERTEXATTRIBP3UIPROC)load("glVertexAttribP3ui");
+        glad_glVertexAttribP3uiv = (PFNGLVERTEXATTRIBP3UIVPROC)load("glVertexAttribP3uiv");
+        glad_glVertexAttribP4ui = (PFNGLVERTEXATTRIBP4UIPROC)load("glVertexAttribP4ui");
+        glad_glVertexAttribP4uiv = (PFNGLVERTEXATTRIBP4UIVPROC)load("glVertexAttribP4uiv");
+        glad_glVertexP2ui = (PFNGLVERTEXP2UIPROC)load("glVertexP2ui");
+        glad_glVertexP2uiv = (PFNGLVERTEXP2UIVPROC)load("glVertexP2uiv");
+        glad_glVertexP3ui = (PFNGLVERTEXP3UIPROC)load("glVertexP3ui");
+        glad_glVertexP3uiv = (PFNGLVERTEXP3UIVPROC)load("glVertexP3uiv");
+        glad_glVertexP4ui = (PFNGLVERTEXP4UIPROC)load("glVertexP4ui");
+        glad_glVertexP4uiv = (PFNGLVERTEXP4UIVPROC)load("glVertexP4uiv");
+        glad_glTexCoordP1ui = (PFNGLTEXCOORDP1UIPROC)load("glTexCoordP1ui");
+        glad_glTexCoordP1uiv = (PFNGLTEXCOORDP1UIVPROC)load("glTexCoordP1uiv");
+        glad_glTexCoordP2ui = (PFNGLTEXCOORDP2UIPROC)load("glTexCoordP2ui");
+        glad_glTexCoordP2uiv = (PFNGLTEXCOORDP2UIVPROC)load("glTexCoordP2uiv");
+        glad_glTexCoordP3ui = (PFNGLTEXCOORDP3UIPROC)load("glTexCoordP3ui");
+        glad_glTexCoordP3uiv = (PFNGLTEXCOORDP3UIVPROC)load("glTexCoordP3uiv");
+        glad_glTexCoordP4ui = (PFNGLTEXCOORDP4UIPROC)load("glTexCoordP4ui");
+        glad_glTexCoordP4uiv = (PFNGLTEXCOORDP4UIVPROC)load("glTexCoordP4uiv");
+        glad_glMultiTexCoordP1ui = (PFNGLMULTITEXCOORDP1UIPROC)load("glMultiTexCoordP1ui");
+        glad_glMultiTexCoordP1uiv = (PFNGLMULTITEXCOORDP1UIVPROC)load("glMultiTexCoordP1uiv");
+        glad_glMultiTexCoordP2ui = (PFNGLMULTITEXCOORDP2UIPROC)load("glMultiTexCoordP2ui");
+        glad_glMultiTexCoordP2uiv = (PFNGLMULTITEXCOORDP2UIVPROC)load("glMultiTexCoordP2uiv");
+        glad_glMultiTexCoordP3ui = (PFNGLMULTITEXCOORDP3UIPROC)load("glMultiTexCoordP3ui");
+        glad_glMultiTexCoordP3uiv = (PFNGLMULTITEXCOORDP3UIVPROC)load("glMultiTexCoordP3uiv");
+        glad_glMultiTexCoordP4ui = (PFNGLMULTITEXCOORDP4UIPROC)load("glMultiTexCoordP4ui");
+        glad_glMultiTexCoordP4uiv = (PFNGLMULTITEXCOORDP4UIVPROC)load("glMultiTexCoordP4uiv");
+        glad_glNormalP3ui = (PFNGLNORMALP3UIPROC)load("glNormalP3ui");
+        glad_glNormalP3uiv = (PFNGLNORMALP3UIVPROC)load("glNormalP3uiv");
+        glad_glColorP3ui = (PFNGLCOLORP3UIPROC)load("glColorP3ui");
+        glad_glColorP3uiv = (PFNGLCOLORP3UIVPROC)load("glColorP3uiv");
+        glad_glColorP4ui = (PFNGLCOLORP4UIPROC)load("glColorP4ui");
+        glad_glColorP4uiv = (PFNGLCOLORP4UIVPROC)load("glColorP4uiv");
+        glad_glSecondaryColorP3ui = (PFNGLSECONDARYCOLORP3UIPROC)load("glSecondaryColorP3ui");
+        glad_glSecondaryColorP3uiv = (PFNGLSECONDARYCOLORP3UIVPROC)load("glSecondaryColorP3uiv");
+}
+static void load_GL_VERSION_4_0(GLADloadproc load) {
+        if(!GLAD_GL_VERSION_4_0) return;
+        glad_glMinSampleShading = (PFNGLMINSAMPLESHADINGPROC)load("glMinSampleShading");
+        glad_glBlendEquationi = (PFNGLBLENDEQUATIONIPROC)load("glBlendEquationi");
+        glad_glBlendEquationSeparatei = (PFNGLBLENDEQUATIONSEPARATEIPROC)load("glBlendEquationSeparatei");
+        glad_glBlendFunci = (PFNGLBLENDFUNCIPROC)load("glBlendFunci");
+        glad_glBlendFuncSeparatei = (PFNGLBLENDFUNCSEPARATEIPROC)load("glBlendFuncSeparatei");
+        glad_glDrawArraysIndirect = (PFNGLDRAWARRAYSINDIRECTPROC)load("glDrawArraysIndirect");
+        glad_glDrawElementsIndirect = (PFNGLDRAWELEMENTSINDIRECTPROC)load("glDrawElementsIndirect");
+        glad_glUniform1d = (PFNGLUNIFORM1DPROC)load("glUniform1d");
+        glad_glUniform2d = (PFNGLUNIFORM2DPROC)load("glUniform2d");
+        glad_glUniform3d = (PFNGLUNIFORM3DPROC)load("glUniform3d");
+        glad_glUniform4d = (PFNGLUNIFORM4DPROC)load("glUniform4d");
+        glad_glUniform1dv = (PFNGLUNIFORM1DVPROC)load("glUniform1dv");
+        glad_glUniform2dv = (PFNGLUNIFORM2DVPROC)load("glUniform2dv");
+        glad_glUniform3dv = (PFNGLUNIFORM3DVPROC)load("glUniform3dv");
+        glad_glUniform4dv = (PFNGLUNIFORM4DVPROC)load("glUniform4dv");
+        glad_glUniformMatrix2dv = (PFNGLUNIFORMMATRIX2DVPROC)load("glUniformMatrix2dv");
+        glad_glUniformMatrix3dv = (PFNGLUNIFORMMATRIX3DVPROC)load("glUniformMatrix3dv");
+        glad_glUniformMatrix4dv = (PFNGLUNIFORMMATRIX4DVPROC)load("glUniformMatrix4dv");
+        glad_glUniformMatrix2x3dv = (PFNGLUNIFORMMATRIX2X3DVPROC)load("glUniformMatrix2x3dv");
+        glad_glUniformMatrix2x4dv = (PFNGLUNIFORMMATRIX2X4DVPROC)load("glUniformMatrix2x4dv");
+        glad_glUniformMatrix3x2dv = (PFNGLUNIFORMMATRIX3X2DVPROC)load("glUniformMatrix3x2dv");
+        glad_glUniformMatrix3x4dv = (PFNGLUNIFORMMATRIX3X4DVPROC)load("glUniformMatrix3x4dv");
+        glad_glUniformMatrix4x2dv = (PFNGLUNIFORMMATRIX4X2DVPROC)load("glUniformMatrix4x2dv");
+        glad_glUniformMatrix4x3dv = (PFNGLUNIFORMMATRIX4X3DVPROC)load("glUniformMatrix4x3dv");
+        glad_glGetUniformdv = (PFNGLGETUNIFORMDVPROC)load("glGetUniformdv");
+        glad_glGetSubroutineUniformLocation = (PFNGLGETSUBROUTINEUNIFORMLOCATIONPROC)load("glGetSubroutineUniformLocation");
+        glad_glGetSubroutineIndex = (PFNGLGETSUBROUTINEINDEXPROC)load("glGetSubroutineIndex");
+        glad_glGetActiveSubroutineUniformiv = (PFNGLGETACTIVESUBROUTINEUNIFORMIVPROC)load("glGetActiveSubroutineUniformiv");
+        glad_glGetActiveSubroutineUniformName = (PFNGLGETACTIVESUBROUTINEUNIFORMNAMEPROC)load("glGetActiveSubroutineUniformName");
+        glad_glGetActiveSubroutineName = (PFNGLGETACTIVESUBROUTINENAMEPROC)load("glGetActiveSubroutineName");
+        glad_glUniformSubroutinesuiv = (PFNGLUNIFORMSUBROUTINESUIVPROC)load("glUniformSubroutinesuiv");
+        glad_glGetUniformSubroutineuiv = (PFNGLGETUNIFORMSUBROUTINEUIVPROC)load("glGetUniformSubroutineuiv");
+        glad_glGetProgramStageiv = (PFNGLGETPROGRAMSTAGEIVPROC)load("glGetProgramStageiv");
+        glad_glPatchParameteri = (PFNGLPATCHPARAMETERIPROC)load("glPatchParameteri");
+        glad_glPatchParameterfv = (PFNGLPATCHPARAMETERFVPROC)load("glPatchParameterfv");
+        glad_glBindTransformFeedback = (PFNGLBINDTRANSFORMFEEDBACKPROC)load("glBindTransformFeedback");
+        glad_glDeleteTransformFeedbacks = (PFNGLDELETETRANSFORMFEEDBACKSPROC)load("glDeleteTransformFeedbacks");
+        glad_glGenTransformFeedbacks = (PFNGLGENTRANSFORMFEEDBACKSPROC)load("glGenTransformFeedbacks");
+        glad_glIsTransformFeedback = (PFNGLISTRANSFORMFEEDBACKPROC)load("glIsTransformFeedback");
+        glad_glPauseTransformFeedback = (PFNGLPAUSETRANSFORMFEEDBACKPROC)load("glPauseTransformFeedback");
+        glad_glResumeTransformFeedback = (PFNGLRESUMETRANSFORMFEEDBACKPROC)load("glResumeTransformFeedback");
+        glad_glDrawTransformFeedback = (PFNGLDRAWTRANSFORMFEEDBACKPROC)load("glDrawTransformFeedback");
+        glad_glDrawTransformFeedbackStream = (PFNGLDRAWTRANSFORMFEEDBACKSTREAMPROC)load("glDrawTransformFeedbackStream");
+        glad_glBeginQueryIndexed = (PFNGLBEGINQUERYINDEXEDPROC)load("glBeginQueryIndexed");
+        glad_glEndQueryIndexed = (PFNGLENDQUERYINDEXEDPROC)load("glEndQueryIndexed");
+        glad_glGetQueryIndexediv = (PFNGLGETQUERYINDEXEDIVPROC)load("glGetQueryIndexediv");
+}
+static void load_GL_VERSION_4_1(GLADloadproc load) {
+        if(!GLAD_GL_VERSION_4_1) return;
+        glad_glReleaseShaderCompiler = (PFNGLRELEASESHADERCOMPILERPROC)load("glReleaseShaderCompiler");
+        glad_glShaderBinary = (PFNGLSHADERBINARYPROC)load("glShaderBinary");
+        glad_glGetShaderPrecisionFormat = (PFNGLGETSHADERPRECISIONFORMATPROC)load("glGetShaderPrecisionFormat");
+        glad_glDepthRangef = (PFNGLDEPTHRANGEFPROC)load("glDepthRangef");
+        glad_glClearDepthf = (PFNGLCLEARDEPTHFPROC)load("glClearDepthf");
+        glad_glGetProgramBinary = (PFNGLGETPROGRAMBINARYPROC)load("glGetProgramBinary");
+        glad_glProgramBinary = (PFNGLPROGRAMBINARYPROC)load("glProgramBinary");
+        glad_glProgramParameteri = (PFNGLPROGRAMPARAMETERIPROC)load("glProgramParameteri");
+        glad_glUseProgramStages = (PFNGLUSEPROGRAMSTAGESPROC)load("glUseProgramStages");
+        glad_glActiveShaderProgram = (PFNGLACTIVESHADERPROGRAMPROC)load("glActiveShaderProgram");
+        glad_glCreateShaderProgramv = (PFNGLCREATESHADERPROGRAMVPROC)load("glCreateShaderProgramv");
+        glad_glBindProgramPipeline = (PFNGLBINDPROGRAMPIPELINEPROC)load("glBindProgramPipeline");
+        glad_glDeleteProgramPipelines = (PFNGLDELETEPROGRAMPIPELINESPROC)load("glDeleteProgramPipelines");
+        glad_glGenProgramPipelines = (PFNGLGENPROGRAMPIPELINESPROC)load("glGenProgramPipelines");
+        glad_glIsProgramPipeline = (PFNGLISPROGRAMPIPELINEPROC)load("glIsProgramPipeline");
+        glad_glGetProgramPipelineiv = (PFNGLGETPROGRAMPIPELINEIVPROC)load("glGetProgramPipelineiv");
+        glad_glProgramParameteri = (PFNGLPROGRAMPARAMETERIPROC)load("glProgramParameteri");
+        glad_glProgramUniform1i = (PFNGLPROGRAMUNIFORM1IPROC)load("glProgramUniform1i");
+        glad_glProgramUniform1iv = (PFNGLPROGRAMUNIFORM1IVPROC)load("glProgramUniform1iv");
+        glad_glProgramUniform1f = (PFNGLPROGRAMUNIFORM1FPROC)load("glProgramUniform1f");
+        glad_glProgramUniform1fv = (PFNGLPROGRAMUNIFORM1FVPROC)load("glProgramUniform1fv");
+        glad_glProgramUniform1d = (PFNGLPROGRAMUNIFORM1DPROC)load("glProgramUniform1d");
+        glad_glProgramUniform1dv = (PFNGLPROGRAMUNIFORM1DVPROC)load("glProgramUniform1dv");
+        glad_glProgramUniform1ui = (PFNGLPROGRAMUNIFORM1UIPROC)load("glProgramUniform1ui");
+        glad_glProgramUniform1uiv = (PFNGLPROGRAMUNIFORM1UIVPROC)load("glProgramUniform1uiv");
+        glad_glProgramUniform2i = (PFNGLPROGRAMUNIFORM2IPROC)load("glProgramUniform2i");
+        glad_glProgramUniform2iv = (PFNGLPROGRAMUNIFORM2IVPROC)load("glProgramUniform2iv");
+        glad_glProgramUniform2f = (PFNGLPROGRAMUNIFORM2FPROC)load("glProgramUniform2f");
+        glad_glProgramUniform2fv = (PFNGLPROGRAMUNIFORM2FVPROC)load("glProgramUniform2fv");
+        glad_glProgramUniform2d = (PFNGLPROGRAMUNIFORM2DPROC)load("glProgramUniform2d");
+        glad_glProgramUniform2dv = (PFNGLPROGRAMUNIFORM2DVPROC)load("glProgramUniform2dv");
+        glad_glProgramUniform2ui = (PFNGLPROGRAMUNIFORM2UIPROC)load("glProgramUniform2ui");
+        glad_glProgramUniform2uiv = (PFNGLPROGRAMUNIFORM2UIVPROC)load("glProgramUniform2uiv");
+        glad_glProgramUniform3i = (PFNGLPROGRAMUNIFORM3IPROC)load("glProgramUniform3i");
+        glad_glProgramUniform3iv = (PFNGLPROGRAMUNIFORM3IVPROC)load("glProgramUniform3iv");
+        glad_glProgramUniform3f = (PFNGLPROGRAMUNIFORM3FPROC)load("glProgramUniform3f");
+        glad_glProgramUniform3fv = (PFNGLPROGRAMUNIFORM3FVPROC)load("glProgramUniform3fv");
+        glad_glProgramUniform3d = (PFNGLPROGRAMUNIFORM3DPROC)load("glProgramUniform3d");
+        glad_glProgramUniform3dv = (PFNGLPROGRAMUNIFORM3DVPROC)load("glProgramUniform3dv");
+        glad_glProgramUniform3ui = (PFNGLPROGRAMUNIFORM3UIPROC)load("glProgramUniform3ui");
+        glad_glProgramUniform3uiv = (PFNGLPROGRAMUNIFORM3UIVPROC)load("glProgramUniform3uiv");
+        glad_glProgramUniform4i = (PFNGLPROGRAMUNIFORM4IPROC)load("glProgramUniform4i");
+        glad_glProgramUniform4iv = (PFNGLPROGRAMUNIFORM4IVPROC)load("glProgramUniform4iv");
+        glad_glProgramUniform4f = (PFNGLPROGRAMUNIFORM4FPROC)load("glProgramUniform4f");
+        glad_glProgramUniform4fv = (PFNGLPROGRAMUNIFORM4FVPROC)load("glProgramUniform4fv");
+        glad_glProgramUniform4d = (PFNGLPROGRAMUNIFORM4DPROC)load("glProgramUniform4d");
+        glad_glProgramUniform4dv = (PFNGLPROGRAMUNIFORM4DVPROC)load("glProgramUniform4dv");
+        glad_glProgramUniform4ui = (PFNGLPROGRAMUNIFORM4UIPROC)load("glProgramUniform4ui");
+        glad_glProgramUniform4uiv = (PFNGLPROGRAMUNIFORM4UIVPROC)load("glProgramUniform4uiv");
+        glad_glProgramUniformMatrix2fv = (PFNGLPROGRAMUNIFORMMATRIX2FVPROC)load("glProgramUniformMatrix2fv");
+        glad_glProgramUniformMatrix3fv = (PFNGLPROGRAMUNIFORMMATRIX3FVPROC)load("glProgramUniformMatrix3fv");
+        glad_glProgramUniformMatrix4fv = (PFNGLPROGRAMUNIFORMMATRIX4FVPROC)load("glProgramUniformMatrix4fv");
+        glad_glProgramUniformMatrix2dv = (PFNGLPROGRAMUNIFORMMATRIX2DVPROC)load("glProgramUniformMatrix2dv");
+        glad_glProgramUniformMatrix3dv = (PFNGLPROGRAMUNIFORMMATRIX3DVPROC)load("glProgramUniformMatrix3dv");
+        glad_glProgramUniformMatrix4dv = (PFNGLPROGRAMUNIFORMMATRIX4DVPROC)load("glProgramUniformMatrix4dv");
+        glad_glProgramUniformMatrix2x3fv = (PFNGLPROGRAMUNIFORMMATRIX2X3FVPROC)load("glProgramUniformMatrix2x3fv");
+        glad_glProgramUniformMatrix3x2fv = (PFNGLPROGRAMUNIFORMMATRIX3X2FVPROC)load("glProgramUniformMatrix3x2fv");
+        glad_glProgramUniformMatrix2x4fv = (PFNGLPROGRAMUNIFORMMATRIX2X4FVPROC)load("glProgramUniformMatrix2x4fv");
+        glad_glProgramUniformMatrix4x2fv = (PFNGLPROGRAMUNIFORMMATRIX4X2FVPROC)load("glProgramUniformMatrix4x2fv");
+        glad_glProgramUniformMatrix3x4fv = (PFNGLPROGRAMUNIFORMMATRIX3X4FVPROC)load("glProgramUniformMatrix3x4fv");
+        glad_glProgramUniformMatrix4x3fv = (PFNGLPROGRAMUNIFORMMATRIX4X3FVPROC)load("glProgramUniformMatrix4x3fv");
+        glad_glProgramUniformMatrix2x3dv = (PFNGLPROGRAMUNIFORMMATRIX2X3DVPROC)load("glProgramUniformMatrix2x3dv");
+        glad_glProgramUniformMatrix3x2dv = (PFNGLPROGRAMUNIFORMMATRIX3X2DVPROC)load("glProgramUniformMatrix3x2dv");
+        glad_glProgramUniformMatrix2x4dv = (PFNGLPROGRAMUNIFORMMATRIX2X4DVPROC)load("glProgramUniformMatrix2x4dv");
+        glad_glProgramUniformMatrix4x2dv = (PFNGLPROGRAMUNIFORMMATRIX4X2DVPROC)load("glProgramUniformMatrix4x2dv");
+        glad_glProgramUniformMatrix3x4dv = (PFNGLPROGRAMUNIFORMMATRIX3X4DVPROC)load("glProgramUniformMatrix3x4dv");
+        glad_glProgramUniformMatrix4x3dv = (PFNGLPROGRAMUNIFORMMATRIX4X3DVPROC)load("glProgramUniformMatrix4x3dv");
+        glad_glValidateProgramPipeline = (PFNGLVALIDATEPROGRAMPIPELINEPROC)load("glValidateProgramPipeline");
+        glad_glGetProgramPipelineInfoLog = (PFNGLGETPROGRAMPIPELINEINFOLOGPROC)load("glGetProgramPipelineInfoLog");
+        glad_glVertexAttribL1d = (PFNGLVERTEXATTRIBL1DPROC)load("glVertexAttribL1d");
+        glad_glVertexAttribL2d = (PFNGLVERTEXATTRIBL2DPROC)load("glVertexAttribL2d");
+        glad_glVertexAttribL3d = (PFNGLVERTEXATTRIBL3DPROC)load("glVertexAttribL3d");
+        glad_glVertexAttribL4d = (PFNGLVERTEXATTRIBL4DPROC)load("glVertexAttribL4d");
+        glad_glVertexAttribL1dv = (PFNGLVERTEXATTRIBL1DVPROC)load("glVertexAttribL1dv");
+        glad_glVertexAttribL2dv = (PFNGLVERTEXATTRIBL2DVPROC)load("glVertexAttribL2dv");
+        glad_glVertexAttribL3dv = (PFNGLVERTEXATTRIBL3DVPROC)load("glVertexAttribL3dv");
+        glad_glVertexAttribL4dv = (PFNGLVERTEXATTRIBL4DVPROC)load("glVertexAttribL4dv");
+        glad_glVertexAttribLPointer = (PFNGLVERTEXATTRIBLPOINTERPROC)load("glVertexAttribLPointer");
+        glad_glGetVertexAttribLdv = (PFNGLGETVERTEXATTRIBLDVPROC)load("glGetVertexAttribLdv");
+        glad_glViewportArrayv = (PFNGLVIEWPORTARRAYVPROC)load("glViewportArrayv");
+        glad_glViewportIndexedf = (PFNGLVIEWPORTINDEXEDFPROC)load("glViewportIndexedf");
+        glad_glViewportIndexedfv = (PFNGLVIEWPORTINDEXEDFVPROC)load("glViewportIndexedfv");
+        glad_glScissorArrayv = (PFNGLSCISSORARRAYVPROC)load("glScissorArrayv");
+        glad_glScissorIndexed = (PFNGLSCISSORINDEXEDPROC)load("glScissorIndexed");
+        glad_glScissorIndexedv = (PFNGLSCISSORINDEXEDVPROC)load("glScissorIndexedv");
+        glad_glDepthRangeArrayv = (PFNGLDEPTHRANGEARRAYVPROC)load("glDepthRangeArrayv");
+        glad_glDepthRangeIndexed = (PFNGLDEPTHRANGEINDEXEDPROC)load("glDepthRangeIndexed");
+        glad_glGetFloati_v = (PFNGLGETFLOATI_VPROC)load("glGetFloati_v");
+        glad_glGetDoublei_v = (PFNGLGETDOUBLEI_VPROC)load("glGetDoublei_v");
+}
+static void load_GL_VERSION_4_2(GLADloadproc load) {
+        if(!GLAD_GL_VERSION_4_2) return;
+        glad_glDrawArraysInstancedBaseInstance = (PFNGLDRAWARRAYSINSTANCEDBASEINSTANCEPROC)load("glDrawArraysInstancedBaseInstance");
+        glad_glDrawElementsInstancedBaseInstance = (PFNGLDRAWELEMENTSINSTANCEDBASEINSTANCEPROC)load("glDrawElementsInstancedBaseInstance");
+        glad_glDrawElementsInstancedBaseVertexBaseInstance = (PFNGLDRAWELEMENTSINSTANCEDBASEVERTEXBASEINSTANCEPROC)load("glDrawElementsInstancedBaseVertexBaseInstance");
+        glad_glGetInternalformativ = (PFNGLGETINTERNALFORMATIVPROC)load("glGetInternalformativ");
+        glad_glGetActiveAtomicCounterBufferiv = (PFNGLGETACTIVEATOMICCOUNTERBUFFERIVPROC)load("glGetActiveAtomicCounterBufferiv");
+        glad_glBindImageTexture = (PFNGLBINDIMAGETEXTUREPROC)load("glBindImageTexture");
+        glad_glMemoryBarrier = (PFNGLMEMORYBARRIERPROC)load("glMemoryBarrier");
+        glad_glTexStorage1D = (PFNGLTEXSTORAGE1DPROC)load("glTexStorage1D");
+        glad_glTexStorage2D = (PFNGLTEXSTORAGE2DPROC)load("glTexStorage2D");
+        glad_glTexStorage3D = (PFNGLTEXSTORAGE3DPROC)load("glTexStorage3D");
+        glad_glDrawTransformFeedbackInstanced = (PFNGLDRAWTRANSFORMFEEDBACKINSTANCEDPROC)load("glDrawTransformFeedbackInstanced");
+        glad_glDrawTransformFeedbackStreamInstanced = (PFNGLDRAWTRANSFORMFEEDBACKSTREAMINSTANCEDPROC)load("glDrawTransformFeedbackStreamInstanced");
+}
+static void load_GL_VERSION_4_3(GLADloadproc load) {
+        if(!GLAD_GL_VERSION_4_3) return;
+        glad_glClearBufferData = (PFNGLCLEARBUFFERDATAPROC)load("glClearBufferData");
+        glad_glClearBufferSubData = (PFNGLCLEARBUFFERSUBDATAPROC)load("glClearBufferSubData");
+        glad_glDispatchCompute = (PFNGLDISPATCHCOMPUTEPROC)load("glDispatchCompute");
+        glad_glDispatchComputeIndirect = (PFNGLDISPATCHCOMPUTEINDIRECTPROC)load("glDispatchComputeIndirect");
+        glad_glCopyImageSubData = (PFNGLCOPYIMAGESUBDATAPROC)load("glCopyImageSubData");
+        glad_glFramebufferParameteri = (PFNGLFRAMEBUFFERPARAMETERIPROC)load("glFramebufferParameteri");
+        glad_glGetFramebufferParameteriv = (PFNGLGETFRAMEBUFFERPARAMETERIVPROC)load("glGetFramebufferParameteriv");
+        glad_glGetInternalformati64v = (PFNGLGETINTERNALFORMATI64VPROC)load("glGetInternalformati64v");
+        glad_glInvalidateTexSubImage = (PFNGLINVALIDATETEXSUBIMAGEPROC)load("glInvalidateTexSubImage");
+        glad_glInvalidateTexImage = (PFNGLINVALIDATETEXIMAGEPROC)load("glInvalidateTexImage");
+        glad_glInvalidateBufferSubData = (PFNGLINVALIDATEBUFFERSUBDATAPROC)load("glInvalidateBufferSubData");
+        glad_glInvalidateBufferData = (PFNGLINVALIDATEBUFFERDATAPROC)load("glInvalidateBufferData");
+        glad_glInvalidateFramebuffer = (PFNGLINVALIDATEFRAMEBUFFERPROC)load("glInvalidateFramebuffer");
+        glad_glInvalidateSubFramebuffer = (PFNGLINVALIDATESUBFRAMEBUFFERPROC)load("glInvalidateSubFramebuffer");
+        glad_glMultiDrawArraysIndirect = (PFNGLMULTIDRAWARRAYSINDIRECTPROC)load("glMultiDrawArraysIndirect");
+        glad_glMultiDrawElementsIndirect = (PFNGLMULTIDRAWELEMENTSINDIRECTPROC)load("glMultiDrawElementsIndirect");
+        glad_glGetProgramInterfaceiv = (PFNGLGETPROGRAMINTERFACEIVPROC)load("glGetProgramInterfaceiv");
+        glad_glGetProgramResourceIndex = (PFNGLGETPROGRAMRESOURCEINDEXPROC)load("glGetProgramResourceIndex");
+        glad_glGetProgramResourceName = (PFNGLGETPROGRAMRESOURCENAMEPROC)load("glGetProgramResourceName");
+        glad_glGetProgramResourceiv = (PFNGLGETPROGRAMRESOURCEIVPROC)load("glGetProgramResourceiv");
+        glad_glGetProgramResourceLocation = (PFNGLGETPROGRAMRESOURCELOCATIONPROC)load("glGetProgramResourceLocation");
+        glad_glGetProgramResourceLocationIndex = (PFNGLGETPROGRAMRESOURCELOCATIONINDEXPROC)load("glGetProgramResourceLocationIndex");
+        glad_glShaderStorageBlockBinding = (PFNGLSHADERSTORAGEBLOCKBINDINGPROC)load("glShaderStorageBlockBinding");
+        glad_glTexBufferRange = (PFNGLTEXBUFFERRANGEPROC)load("glTexBufferRange");
+        glad_glTexStorage2DMultisample = (PFNGLTEXSTORAGE2DMULTISAMPLEPROC)load("glTexStorage2DMultisample");
+        glad_glTexStorage3DMultisample = (PFNGLTEXSTORAGE3DMULTISAMPLEPROC)load("glTexStorage3DMultisample");
+        glad_glTextureView = (PFNGLTEXTUREVIEWPROC)load("glTextureView");
+        glad_glBindVertexBuffer = (PFNGLBINDVERTEXBUFFERPROC)load("glBindVertexBuffer");
+        glad_glVertexAttribFormat = (PFNGLVERTEXATTRIBFORMATPROC)load("glVertexAttribFormat");
+        glad_glVertexAttribIFormat = (PFNGLVERTEXATTRIBIFORMATPROC)load("glVertexAttribIFormat");
+        glad_glVertexAttribLFormat = (PFNGLVERTEXATTRIBLFORMATPROC)load("glVertexAttribLFormat");
+        glad_glVertexAttribBinding = (PFNGLVERTEXATTRIBBINDINGPROC)load("glVertexAttribBinding");
+        glad_glVertexBindingDivisor = (PFNGLVERTEXBINDINGDIVISORPROC)load("glVertexBindingDivisor");
+        glad_glDebugMessageControl = (PFNGLDEBUGMESSAGECONTROLPROC)load("glDebugMessageControl");
+        glad_glDebugMessageInsert = (PFNGLDEBUGMESSAGEINSERTPROC)load("glDebugMessageInsert");
+        glad_glDebugMessageCallback = (PFNGLDEBUGMESSAGECALLBACKPROC)load("glDebugMessageCallback");
+        glad_glGetDebugMessageLog = (PFNGLGETDEBUGMESSAGELOGPROC)load("glGetDebugMessageLog");
+        glad_glPushDebugGroup = (PFNGLPUSHDEBUGGROUPPROC)load("glPushDebugGroup");
+        glad_glPopDebugGroup = (PFNGLPOPDEBUGGROUPPROC)load("glPopDebugGroup");
+        glad_glObjectLabel = (PFNGLOBJECTLABELPROC)load("glObjectLabel");
+        glad_glGetObjectLabel = (PFNGLGETOBJECTLABELPROC)load("glGetObjectLabel");
+        glad_glObjectPtrLabel = (PFNGLOBJECTPTRLABELPROC)load("glObjectPtrLabel");
+        glad_glGetObjectPtrLabel = (PFNGLGETOBJECTPTRLABELPROC)load("glGetObjectPtrLabel");
+        glad_glGetPointerv = (PFNGLGETPOINTERVPROC)load("glGetPointerv");
+}
+static void load_GL_VERSION_4_4(GLADloadproc load) {
+        if(!GLAD_GL_VERSION_4_4) return;
+        glad_glBufferStorage = (PFNGLBUFFERSTORAGEPROC)load("glBufferStorage");
+        glad_glClearTexImage = (PFNGLCLEARTEXIMAGEPROC)load("glClearTexImage");
+        glad_glClearTexSubImage = (PFNGLCLEARTEXSUBIMAGEPROC)load("glClearTexSubImage");
+        glad_glBindBuffersBase = (PFNGLBINDBUFFERSBASEPROC)load("glBindBuffersBase");
+        glad_glBindBuffersRange = (PFNGLBINDBUFFERSRANGEPROC)load("glBindBuffersRange");
+        glad_glBindTextures = (PFNGLBINDTEXTURESPROC)load("glBindTextures");
+        glad_glBindSamplers = (PFNGLBINDSAMPLERSPROC)load("glBindSamplers");
+        glad_glBindImageTextures = (PFNGLBINDIMAGETEXTURESPROC)load("glBindImageTextures");
+        glad_glBindVertexBuffers = (PFNGLBINDVERTEXBUFFERSPROC)load("glBindVertexBuffers");
+}
+static void load_GL_VERSION_4_5(GLADloadproc load) {
+        if(!GLAD_GL_VERSION_4_5) return;
+        glad_glClipControl = (PFNGLCLIPCONTROLPROC)load("glClipControl");
+        glad_glCreateTransformFeedbacks = (PFNGLCREATETRANSFORMFEEDBACKSPROC)load("glCreateTransformFeedbacks");
+        glad_glTransformFeedbackBufferBase = (PFNGLTRANSFORMFEEDBACKBUFFERBASEPROC)load("glTransformFeedbackBufferBase");
+        glad_glTransformFeedbackBufferRange = (PFNGLTRANSFORMFEEDBACKBUFFERRANGEPROC)load("glTransformFeedbackBufferRange");
+        glad_glGetTransformFeedbackiv = (PFNGLGETTRANSFORMFEEDBACKIVPROC)load("glGetTransformFeedbackiv");
+        glad_glGetTransformFeedbacki_v = (PFNGLGETTRANSFORMFEEDBACKI_VPROC)load("glGetTransformFeedbacki_v");
+        glad_glGetTransformFeedbacki64_v = (PFNGLGETTRANSFORMFEEDBACKI64_VPROC)load("glGetTransformFeedbacki64_v");
+        glad_glCreateBuffers = (PFNGLCREATEBUFFERSPROC)load("glCreateBuffers");
+        glad_glNamedBufferStorage = (PFNGLNAMEDBUFFERSTORAGEPROC)load("glNamedBufferStorage");
+        glad_glNamedBufferData = (PFNGLNAMEDBUFFERDATAPROC)load("glNamedBufferData");
+        glad_glNamedBufferSubData = (PFNGLNAMEDBUFFERSUBDATAPROC)load("glNamedBufferSubData");
+        glad_glCopyNamedBufferSubData = (PFNGLCOPYNAMEDBUFFERSUBDATAPROC)load("glCopyNamedBufferSubData");
+        glad_glClearNamedBufferData = (PFNGLCLEARNAMEDBUFFERDATAPROC)load("glClearNamedBufferData");
+        glad_glClearNamedBufferSubData = (PFNGLCLEARNAMEDBUFFERSUBDATAPROC)load("glClearNamedBufferSubData");
+        glad_glMapNamedBuffer = (PFNGLMAPNAMEDBUFFERPROC)load("glMapNamedBuffer");
+        glad_glMapNamedBufferRange = (PFNGLMAPNAMEDBUFFERRANGEPROC)load("glMapNamedBufferRange");
+        glad_glUnmapNamedBuffer = (PFNGLUNMAPNAMEDBUFFERPROC)load("glUnmapNamedBuffer");
+        glad_glFlushMappedNamedBufferRange = (PFNGLFLUSHMAPPEDNAMEDBUFFERRANGEPROC)load("glFlushMappedNamedBufferRange");
+        glad_glGetNamedBufferParameteriv = (PFNGLGETNAMEDBUFFERPARAMETERIVPROC)load("glGetNamedBufferParameteriv");
+        glad_glGetNamedBufferParameteri64v = (PFNGLGETNAMEDBUFFERPARAMETERI64VPROC)load("glGetNamedBufferParameteri64v");
+        glad_glGetNamedBufferPointerv = (PFNGLGETNAMEDBUFFERPOINTERVPROC)load("glGetNamedBufferPointerv");
+        glad_glGetNamedBufferSubData = (PFNGLGETNAMEDBUFFERSUBDATAPROC)load("glGetNamedBufferSubData");
+        glad_glCreateFramebuffers = (PFNGLCREATEFRAMEBUFFERSPROC)load("glCreateFramebuffers");
+        glad_glNamedFramebufferRenderbuffer = (PFNGLNAMEDFRAMEBUFFERRENDERBUFFERPROC)load("glNamedFramebufferRenderbuffer");
+        glad_glNamedFramebufferParameteri = (PFNGLNAMEDFRAMEBUFFERPARAMETERIPROC)load("glNamedFramebufferParameteri");
+        glad_glNamedFramebufferTexture = (PFNGLNAMEDFRAMEBUFFERTEXTUREPROC)load("glNamedFramebufferTexture");
+        glad_glNamedFramebufferTextureLayer = (PFNGLNAMEDFRAMEBUFFERTEXTURELAYERPROC)load("glNamedFramebufferTextureLayer");
+        glad_glNamedFramebufferDrawBuffer = (PFNGLNAMEDFRAMEBUFFERDRAWBUFFERPROC)load("glNamedFramebufferDrawBuffer");
+        glad_glNamedFramebufferDrawBuffers = (PFNGLNAMEDFRAMEBUFFERDRAWBUFFERSPROC)load("glNamedFramebufferDrawBuffers");
+        glad_glNamedFramebufferReadBuffer = (PFNGLNAMEDFRAMEBUFFERREADBUFFERPROC)load("glNamedFramebufferReadBuffer");
+        glad_glInvalidateNamedFramebufferData = (PFNGLINVALIDATENAMEDFRAMEBUFFERDATAPROC)load("glInvalidateNamedFramebufferData");
+        glad_glInvalidateNamedFramebufferSubData = (PFNGLINVALIDATENAMEDFRAMEBUFFERSUBDATAPROC)load("glInvalidateNamedFramebufferSubData");
+        glad_glClearNamedFramebufferiv = (PFNGLCLEARNAMEDFRAMEBUFFERIVPROC)load("glClearNamedFramebufferiv");
+        glad_glClearNamedFramebufferuiv = (PFNGLCLEARNAMEDFRAMEBUFFERUIVPROC)load("glClearNamedFramebufferuiv");
+        glad_glClearNamedFramebufferfv = (PFNGLCLEARNAMEDFRAMEBUFFERFVPROC)load("glClearNamedFramebufferfv");
+        glad_glClearNamedFramebufferfi = (PFNGLCLEARNAMEDFRAMEBUFFERFIPROC)load("glClearNamedFramebufferfi");
+        glad_glBlitNamedFramebuffer = (PFNGLBLITNAMEDFRAMEBUFFERPROC)load("glBlitNamedFramebuffer");
+        glad_glCheckNamedFramebufferStatus = (PFNGLCHECKNAMEDFRAMEBUFFERSTATUSPROC)load("glCheckNamedFramebufferStatus");
+        glad_glGetNamedFramebufferParameteriv = (PFNGLGETNAMEDFRAMEBUFFERPARAMETERIVPROC)load("glGetNamedFramebufferParameteriv");
+        glad_glGetNamedFramebufferAttachmentParameteriv = (PFNGLGETNAMEDFRAMEBUFFERATTACHMENTPARAMETERIVPROC)load("glGetNamedFramebufferAttachmentParameteriv");
+        glad_glCreateRenderbuffers = (PFNGLCREATERENDERBUFFERSPROC)load("glCreateRenderbuffers");
+        glad_glNamedRenderbufferStorage = (PFNGLNAMEDRENDERBUFFERSTORAGEPROC)load("glNamedRenderbufferStorage");
+        glad_glNamedRenderbufferStorageMultisample = (PFNGLNAMEDRENDERBUFFERSTORAGEMULTISAMPLEPROC)load("glNamedRenderbufferStorageMultisample");
+        glad_glGetNamedRenderbufferParameteriv = (PFNGLGETNAMEDRENDERBUFFERPARAMETERIVPROC)load("glGetNamedRenderbufferParameteriv");
+        glad_glCreateTextures = (PFNGLCREATETEXTURESPROC)load("glCreateTextures");
+        glad_glTextureBuffer = (PFNGLTEXTUREBUFFERPROC)load("glTextureBuffer");
+        glad_glTextureBufferRange = (PFNGLTEXTUREBUFFERRANGEPROC)load("glTextureBufferRange");
+        glad_glTextureStorage1D = (PFNGLTEXTURESTORAGE1DPROC)load("glTextureStorage1D");
+        glad_glTextureStorage2D = (PFNGLTEXTURESTORAGE2DPROC)load("glTextureStorage2D");
+        glad_glTextureStorage3D = (PFNGLTEXTURESTORAGE3DPROC)load("glTextureStorage3D");
+        glad_glTextureStorage2DMultisample = (PFNGLTEXTURESTORAGE2DMULTISAMPLEPROC)load("glTextureStorage2DMultisample");
+        glad_glTextureStorage3DMultisample = (PFNGLTEXTURESTORAGE3DMULTISAMPLEPROC)load("glTextureStorage3DMultisample");
+        glad_glTextureSubImage1D = (PFNGLTEXTURESUBIMAGE1DPROC)load("glTextureSubImage1D");
+        glad_glTextureSubImage2D = (PFNGLTEXTURESUBIMAGE2DPROC)load("glTextureSubImage2D");
+        glad_glTextureSubImage3D = (PFNGLTEXTURESUBIMAGE3DPROC)load("glTextureSubImage3D");
+        glad_glCompressedTextureSubImage1D = (PFNGLCOMPRESSEDTEXTURESUBIMAGE1DPROC)load("glCompressedTextureSubImage1D");
+        glad_glCompressedTextureSubImage2D = (PFNGLCOMPRESSEDTEXTURESUBIMAGE2DPROC)load("glCompressedTextureSubImage2D");
+        glad_glCompressedTextureSubImage3D = (PFNGLCOMPRESSEDTEXTURESUBIMAGE3DPROC)load("glCompressedTextureSubImage3D");
+        glad_glCopyTextureSubImage1D = (PFNGLCOPYTEXTURESUBIMAGE1DPROC)load("glCopyTextureSubImage1D");
+        glad_glCopyTextureSubImage2D = (PFNGLCOPYTEXTURESUBIMAGE2DPROC)load("glCopyTextureSubImage2D");
+        glad_glCopyTextureSubImage3D = (PFNGLCOPYTEXTURESUBIMAGE3DPROC)load("glCopyTextureSubImage3D");
+        glad_glTextureParameterf = (PFNGLTEXTUREPARAMETERFPROC)load("glTextureParameterf");
+        glad_glTextureParameterfv = (PFNGLTEXTUREPARAMETERFVPROC)load("glTextureParameterfv");
+        glad_glTextureParameteri = (PFNGLTEXTUREPARAMETERIPROC)load("glTextureParameteri");
+        glad_glTextureParameterIiv = (PFNGLTEXTUREPARAMETERIIVPROC)load("glTextureParameterIiv");
+        glad_glTextureParameterIuiv = (PFNGLTEXTUREPARAMETERIUIVPROC)load("glTextureParameterIuiv");
+        glad_glTextureParameteriv = (PFNGLTEXTUREPARAMETERIVPROC)load("glTextureParameteriv");
+        glad_glGenerateTextureMipmap = (PFNGLGENERATETEXTUREMIPMAPPROC)load("glGenerateTextureMipmap");
+        glad_glBindTextureUnit = (PFNGLBINDTEXTUREUNITPROC)load("glBindTextureUnit");
+        glad_glGetTextureImage = (PFNGLGETTEXTUREIMAGEPROC)load("glGetTextureImage");
+        glad_glGetCompressedTextureImage = (PFNGLGETCOMPRESSEDTEXTUREIMAGEPROC)load("glGetCompressedTextureImage");
+        glad_glGetTextureLevelParameterfv = (PFNGLGETTEXTURELEVELPARAMETERFVPROC)load("glGetTextureLevelParameterfv");
+        glad_glGetTextureLevelParameteriv = (PFNGLGETTEXTURELEVELPARAMETERIVPROC)load("glGetTextureLevelParameteriv");
+        glad_glGetTextureParameterfv = (PFNGLGETTEXTUREPARAMETERFVPROC)load("glGetTextureParameterfv");
+        glad_glGetTextureParameterIiv = (PFNGLGETTEXTUREPARAMETERIIVPROC)load("glGetTextureParameterIiv");
+        glad_glGetTextureParameterIuiv = (PFNGLGETTEXTUREPARAMETERIUIVPROC)load("glGetTextureParameterIuiv");
+        glad_glGetTextureParameteriv = (PFNGLGETTEXTUREPARAMETERIVPROC)load("glGetTextureParameteriv");
+        glad_glCreateVertexArrays = (PFNGLCREATEVERTEXARRAYSPROC)load("glCreateVertexArrays");
+        glad_glDisableVertexArrayAttrib = (PFNGLDISABLEVERTEXARRAYATTRIBPROC)load("glDisableVertexArrayAttrib");
+        glad_glEnableVertexArrayAttrib = (PFNGLENABLEVERTEXARRAYATTRIBPROC)load("glEnableVertexArrayAttrib");
+        glad_glVertexArrayElementBuffer = (PFNGLVERTEXARRAYELEMENTBUFFERPROC)load("glVertexArrayElementBuffer");
+        glad_glVertexArrayVertexBuffer = (PFNGLVERTEXARRAYVERTEXBUFFERPROC)load("glVertexArrayVertexBuffer");
+        glad_glVertexArrayVertexBuffers = (PFNGLVERTEXARRAYVERTEXBUFFERSPROC)load("glVertexArrayVertexBuffers");
+        glad_glVertexArrayAttribBinding = (PFNGLVERTEXARRAYATTRIBBINDINGPROC)load("glVertexArrayAttribBinding");
+        glad_glVertexArrayAttribFormat = (PFNGLVERTEXARRAYATTRIBFORMATPROC)load("glVertexArrayAttribFormat");
+        glad_glVertexArrayAttribIFormat = (PFNGLVERTEXARRAYATTRIBIFORMATPROC)load("glVertexArrayAttribIFormat");
+        glad_glVertexArrayAttribLFormat = (PFNGLVERTEXARRAYATTRIBLFORMATPROC)load("glVertexArrayAttribLFormat");
+        glad_glVertexArrayBindingDivisor = (PFNGLVERTEXARRAYBINDINGDIVISORPROC)load("glVertexArrayBindingDivisor");
+        glad_glGetVertexArrayiv = (PFNGLGETVERTEXARRAYIVPROC)load("glGetVertexArrayiv");
+        glad_glGetVertexArrayIndexediv = (PFNGLGETVERTEXARRAYINDEXEDIVPROC)load("glGetVertexArrayIndexediv");
+        glad_glGetVertexArrayIndexed64iv = (PFNGLGETVERTEXARRAYINDEXED64IVPROC)load("glGetVertexArrayIndexed64iv");
+        glad_glCreateSamplers = (PFNGLCREATESAMPLERSPROC)load("glCreateSamplers");
+        glad_glCreateProgramPipelines = (PFNGLCREATEPROGRAMPIPELINESPROC)load("glCreateProgramPipelines");
+        glad_glCreateQueries = (PFNGLCREATEQUERIESPROC)load("glCreateQueries");
+        glad_glGetQueryBufferObjecti64v = (PFNGLGETQUERYBUFFEROBJECTI64VPROC)load("glGetQueryBufferObjecti64v");
+        glad_glGetQueryBufferObjectiv = (PFNGLGETQUERYBUFFEROBJECTIVPROC)load("glGetQueryBufferObjectiv");
+        glad_glGetQueryBufferObjectui64v = (PFNGLGETQUERYBUFFEROBJECTUI64VPROC)load("glGetQueryBufferObjectui64v");
+        glad_glGetQueryBufferObjectuiv = (PFNGLGETQUERYBUFFEROBJECTUIVPROC)load("glGetQueryBufferObjectuiv");
+        glad_glMemoryBarrierByRegion = (PFNGLMEMORYBARRIERBYREGIONPROC)load("glMemoryBarrierByRegion");
+        glad_glGetTextureSubImage = (PFNGLGETTEXTURESUBIMAGEPROC)load("glGetTextureSubImage");
+        glad_glGetCompressedTextureSubImage = (PFNGLGETCOMPRESSEDTEXTURESUBIMAGEPROC)load("glGetCompressedTextureSubImage");
+        glad_glGetGraphicsResetStatus = (PFNGLGETGRAPHICSRESETSTATUSPROC)load("glGetGraphicsResetStatus");
+        glad_glGetnCompressedTexImage = (PFNGLGETNCOMPRESSEDTEXIMAGEPROC)load("glGetnCompressedTexImage");
+        glad_glGetnTexImage = (PFNGLGETNTEXIMAGEPROC)load("glGetnTexImage");
+        glad_glGetnUniformdv = (PFNGLGETNUNIFORMDVPROC)load("glGetnUniformdv");
+        glad_glGetnUniformfv = (PFNGLGETNUNIFORMFVPROC)load("glGetnUniformfv");
+        glad_glGetnUniformiv = (PFNGLGETNUNIFORMIVPROC)load("glGetnUniformiv");
+        glad_glGetnUniformuiv = (PFNGLGETNUNIFORMUIVPROC)load("glGetnUniformuiv");
+        glad_glReadnPixels = (PFNGLREADNPIXELSPROC)load("glReadnPixels");
+        glad_glGetnMapdv = (PFNGLGETNMAPDVPROC)load("glGetnMapdv");
+        glad_glGetnMapfv = (PFNGLGETNMAPFVPROC)load("glGetnMapfv");
+        glad_glGetnMapiv = (PFNGLGETNMAPIVPROC)load("glGetnMapiv");
+        glad_glGetnPixelMapfv = (PFNGLGETNPIXELMAPFVPROC)load("glGetnPixelMapfv");
+        glad_glGetnPixelMapuiv = (PFNGLGETNPIXELMAPUIVPROC)load("glGetnPixelMapuiv");
+        glad_glGetnPixelMapusv = (PFNGLGETNPIXELMAPUSVPROC)load("glGetnPixelMapusv");
+        glad_glGetnPolygonStipple = (PFNGLGETNPOLYGONSTIPPLEPROC)load("glGetnPolygonStipple");
+        glad_glGetnColorTable = (PFNGLGETNCOLORTABLEPROC)load("glGetnColorTable");
+        glad_glGetnConvolutionFilter = (PFNGLGETNCONVOLUTIONFILTERPROC)load("glGetnConvolutionFilter");
+        glad_glGetnSeparableFilter = (PFNGLGETNSEPARABLEFILTERPROC)load("glGetnSeparableFilter");
+        glad_glGetnHistogram = (PFNGLGETNHISTOGRAMPROC)load("glGetnHistogram");
+        glad_glGetnMinmax = (PFNGLGETNMINMAXPROC)load("glGetnMinmax");
+        glad_glTextureBarrier = (PFNGLTEXTUREBARRIERPROC)load("glTextureBarrier");
+}
+static void load_GL_VERSION_4_6(GLADloadproc load) {
+        if(!GLAD_GL_VERSION_4_6) return;
+        glad_glSpecializeShader = (PFNGLSPECIALIZESHADERPROC)load("glSpecializeShader");
+        glad_glMultiDrawArraysIndirectCount = (PFNGLMULTIDRAWARRAYSINDIRECTCOUNTPROC)load("glMultiDrawArraysIndirectCount");
+        glad_glMultiDrawElementsIndirectCount = (PFNGLMULTIDRAWELEMENTSINDIRECTCOUNTPROC)load("glMultiDrawElementsIndirectCount");
+        glad_glPolygonOffsetClamp = (PFNGLPOLYGONOFFSETCLAMPPROC)load("glPolygonOffsetClamp");
+}
+static int find_extensionsGL(void) {
+        if (!get_exts()) return 0;
+        (void)&has_ext;
+        free_exts();
+        return 1;
+}
+
+static void find_coreGL(void) {
+
+    /* Thank you @elmindreda
+     * https://github.com/elmindreda/greg/blob/master/templates/greg.c.in#L176
+     * https://github.com/glfw/glfw/blob/master/src/context.c#L36
+     */
+    int i, major, minor;
+
+    const char* version;
+    const char* prefixes[] = {
+        "OpenGL ES-CM ",
+        "OpenGL ES-CL ",
+        "OpenGL ES ",
+        NULL
+    };
+
+    version = (const char*) glGetString(GL_VERSION);
+    if (!version) return;
+
+    for (i = 0;  prefixes[i];  i++) {
+        const size_t length = strlen(prefixes[i]);
+        if (strncmp(version, prefixes[i], length) == 0) {
+            version += length;
+            break;
+        }
+    }
+
+/* PR #18 */
+#ifdef _MSC_VER
+    sscanf_s(version, "%d.%d", &major, &minor);
+#else
+    sscanf(version, "%d.%d", &major, &minor);
+#endif
+
+    GLVersion.major = major; GLVersion.minor = minor;
+    max_loaded_major = major; max_loaded_minor = minor;
+        GLAD_GL_VERSION_1_0 = (major == 1 && minor >= 0) || major > 1;
+        GLAD_GL_VERSION_1_1 = (major == 1 && minor >= 1) || major > 1;
+        GLAD_GL_VERSION_1_2 = (major == 1 && minor >= 2) || major > 1;
+        GLAD_GL_VERSION_1_3 = (major == 1 && minor >= 3) || major > 1;
+        GLAD_GL_VERSION_1_4 = (major == 1 && minor >= 4) || major > 1;
+        GLAD_GL_VERSION_1_5 = (major == 1 && minor >= 5) || major > 1;
+        GLAD_GL_VERSION_2_0 = (major == 2 && minor >= 0) || major > 2;
+        GLAD_GL_VERSION_2_1 = (major == 2 && minor >= 1) || major > 2;
+        GLAD_GL_VERSION_3_0 = (major == 3 && minor >= 0) || major > 3;
+        GLAD_GL_VERSION_3_1 = (major == 3 && minor >= 1) || major > 3;
+        GLAD_GL_VERSION_3_2 = (major == 3 && minor >= 2) || major > 3;
+        GLAD_GL_VERSION_3_3 = (major == 3 && minor >= 3) || major > 3;
+        GLAD_GL_VERSION_4_0 = (major == 4 && minor >= 0) || major > 4;
+        GLAD_GL_VERSION_4_1 = (major == 4 && minor >= 1) || major > 4;
+        GLAD_GL_VERSION_4_2 = (major == 4 && minor >= 2) || major > 4;
+        GLAD_GL_VERSION_4_3 = (major == 4 && minor >= 3) || major > 4;
+        GLAD_GL_VERSION_4_4 = (major == 4 && minor >= 4) || major > 4;
+        GLAD_GL_VERSION_4_5 = (major == 4 && minor >= 5) || major > 4;
+        GLAD_GL_VERSION_4_6 = (major == 4 && minor >= 6) || major > 4;
+        if (GLVersion.major > 4 || (GLVersion.major >= 4 && GLVersion.minor >= 6)) {
+                max_loaded_major = 4;
+                max_loaded_minor = 6;
+        }
+}
+
+int gladLoadGLLoader(GLADloadproc load) {
+        GLVersion.major = 0; GLVersion.minor = 0;
+        glGetString = (PFNGLGETSTRINGPROC)load("glGetString");
+        if(glGetString == NULL) return 0;
+        if(glGetString(GL_VERSION) == NULL) return 0;
+        find_coreGL();
+        load_GL_VERSION_1_0(load);
+        load_GL_VERSION_1_1(load);
+        load_GL_VERSION_1_2(load);
+        load_GL_VERSION_1_3(load);
+        load_GL_VERSION_1_4(load);
+        load_GL_VERSION_1_5(load);
+        load_GL_VERSION_2_0(load);
+        load_GL_VERSION_2_1(load);
+        load_GL_VERSION_3_0(load);
+        load_GL_VERSION_3_1(load);
+        load_GL_VERSION_3_2(load);
+        load_GL_VERSION_3_3(load);
+        load_GL_VERSION_4_0(load);
+        load_GL_VERSION_4_1(load);
+        load_GL_VERSION_4_2(load);
+        load_GL_VERSION_4_3(load);
+        load_GL_VERSION_4_4(load);
+        load_GL_VERSION_4_5(load);
+        load_GL_VERSION_4_6(load);
+
+        if (!find_extensionsGL()) return 0;
+        return GLVersion.major != 0 || GLVersion.minor != 0;
+}
+
+static void load_GL_ES_VERSION_2_0(GLADloadproc load) {
+        if(!GLAD_GL_ES_VERSION_2_0) return;
+        glad_glActiveTexture = (PFNGLACTIVETEXTUREPROC)load("glActiveTexture");
+        glad_glAttachShader = (PFNGLATTACHSHADERPROC)load("glAttachShader");
+        glad_glBindAttribLocation = (PFNGLBINDATTRIBLOCATIONPROC)load("glBindAttribLocation");
+        glad_glBindBuffer = (PFNGLBINDBUFFERPROC)load("glBindBuffer");
+        glad_glBindFramebuffer = (PFNGLBINDFRAMEBUFFERPROC)load("glBindFramebuffer");
+        glad_glBindRenderbuffer = (PFNGLBINDRENDERBUFFERPROC)load("glBindRenderbuffer");
+        glad_glBindTexture = (PFNGLBINDTEXTUREPROC)load("glBindTexture");
+        glad_glBlendColor = (PFNGLBLENDCOLORPROC)load("glBlendColor");
+        glad_glBlendEquation = (PFNGLBLENDEQUATIONPROC)load("glBlendEquation");
+        glad_glBlendEquationSeparate = (PFNGLBLENDEQUATIONSEPARATEPROC)load("glBlendEquationSeparate");
+        glad_glBlendFunc = (PFNGLBLENDFUNCPROC)load("glBlendFunc");
+        glad_glBlendFuncSeparate = (PFNGLBLENDFUNCSEPARATEPROC)load("glBlendFuncSeparate");
+        glad_glBufferData = (PFNGLBUFFERDATAPROC)load("glBufferData");
+        glad_glBufferSubData = (PFNGLBUFFERSUBDATAPROC)load("glBufferSubData");
+        glad_glCheckFramebufferStatus = (PFNGLCHECKFRAMEBUFFERSTATUSPROC)load("glCheckFramebufferStatus");
+        glad_glClear = (PFNGLCLEARPROC)load("glClear");
+        glad_glClearColor = (PFNGLCLEARCOLORPROC)load("glClearColor");
+        glad_glClearDepthf = (PFNGLCLEARDEPTHFPROC)load("glClearDepthf");
+        glad_glClearStencil = (PFNGLCLEARSTENCILPROC)load("glClearStencil");
+        glad_glColorMask = (PFNGLCOLORMASKPROC)load("glColorMask");
+        glad_glCompileShader = (PFNGLCOMPILESHADERPROC)load("glCompileShader");
+        glad_glCompressedTexImage2D = (PFNGLCOMPRESSEDTEXIMAGE2DPROC)load("glCompressedTexImage2D");
+        glad_glCompressedTexSubImage2D = (PFNGLCOMPRESSEDTEXSUBIMAGE2DPROC)load("glCompressedTexSubImage2D");
+        glad_glCopyTexImage2D = (PFNGLCOPYTEXIMAGE2DPROC)load("glCopyTexImage2D");
+        glad_glCopyTexSubImage2D = (PFNGLCOPYTEXSUBIMAGE2DPROC)load("glCopyTexSubImage2D");
+        glad_glCreateProgram = (PFNGLCREATEPROGRAMPROC)load("glCreateProgram");
+        glad_glCreateShader = (PFNGLCREATESHADERPROC)load("glCreateShader");
+        glad_glCullFace = (PFNGLCULLFACEPROC)load("glCullFace");
+        glad_glDeleteBuffers = (PFNGLDELETEBUFFERSPROC)load("glDeleteBuffers");
+        glad_glDeleteFramebuffers = (PFNGLDELETEFRAMEBUFFERSPROC)load("glDeleteFramebuffers");
+        glad_glDeleteProgram = (PFNGLDELETEPROGRAMPROC)load("glDeleteProgram");
+        glad_glDeleteRenderbuffers = (PFNGLDELETERENDERBUFFERSPROC)load("glDeleteRenderbuffers");
+        glad_glDeleteShader = (PFNGLDELETESHADERPROC)load("glDeleteShader");
+        glad_glDeleteTextures = (PFNGLDELETETEXTURESPROC)load("glDeleteTextures");
+        glad_glDepthFunc = (PFNGLDEPTHFUNCPROC)load("glDepthFunc");
+        glad_glDepthMask = (PFNGLDEPTHMASKPROC)load("glDepthMask");
+        glad_glDepthRangef = (PFNGLDEPTHRANGEFPROC)load("glDepthRangef");
+        glad_glDetachShader = (PFNGLDETACHSHADERPROC)load("glDetachShader");
+        glad_glDisable = (PFNGLDISABLEPROC)load("glDisable");
+        glad_glDisableVertexAttribArray = (PFNGLDISABLEVERTEXATTRIBARRAYPROC)load("glDisableVertexAttribArray");
+        glad_glDrawArrays = (PFNGLDRAWARRAYSPROC)load("glDrawArrays");
+        glad_glDrawElements = (PFNGLDRAWELEMENTSPROC)load("glDrawElements");
+        glad_glEnable = (PFNGLENABLEPROC)load("glEnable");
+        glad_glEnableVertexAttribArray = (PFNGLENABLEVERTEXATTRIBARRAYPROC)load("glEnableVertexAttribArray");
+        glad_glFinish = (PFNGLFINISHPROC)load("glFinish");
+        glad_glFlush = (PFNGLFLUSHPROC)load("glFlush");
+        glad_glFramebufferRenderbuffer = (PFNGLFRAMEBUFFERRENDERBUFFERPROC)load("glFramebufferRenderbuffer");
+        glad_glFramebufferTexture2D = (PFNGLFRAMEBUFFERTEXTURE2DPROC)load("glFramebufferTexture2D");
+        glad_glFrontFace = (PFNGLFRONTFACEPROC)load("glFrontFace");
+        glad_glGenBuffers = (PFNGLGENBUFFERSPROC)load("glGenBuffers");
+        glad_glGenerateMipmap = (PFNGLGENERATEMIPMAPPROC)load("glGenerateMipmap");
+        glad_glGenFramebuffers = (PFNGLGENFRAMEBUFFERSPROC)load("glGenFramebuffers");
+        glad_glGenRenderbuffers = (PFNGLGENRENDERBUFFERSPROC)load("glGenRenderbuffers");
+        glad_glGenTextures = (PFNGLGENTEXTURESPROC)load("glGenTextures");
+        glad_glGetActiveAttrib = (PFNGLGETACTIVEATTRIBPROC)load("glGetActiveAttrib");
+        glad_glGetActiveUniform = (PFNGLGETACTIVEUNIFORMPROC)load("glGetActiveUniform");
+        glad_glGetAttachedShaders = (PFNGLGETATTACHEDSHADERSPROC)load("glGetAttachedShaders");
+        glad_glGetAttribLocation = (PFNGLGETATTRIBLOCATIONPROC)load("glGetAttribLocation");
+        glad_glGetBooleanv = (PFNGLGETBOOLEANVPROC)load("glGetBooleanv");
+        glad_glGetBufferParameteriv = (PFNGLGETBUFFERPARAMETERIVPROC)load("glGetBufferParameteriv");
+        glad_glGetError = (PFNGLGETERRORPROC)load("glGetError");
+        glad_glGetFloatv = (PFNGLGETFLOATVPROC)load("glGetFloatv");
+        glad_glGetFramebufferAttachmentParameteriv = (PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC)load("glGetFramebufferAttachmentParameteriv");
+        glad_glGetIntegerv = (PFNGLGETINTEGERVPROC)load("glGetIntegerv");
+        glad_glGetProgramiv = (PFNGLGETPROGRAMIVPROC)load("glGetProgramiv");
+        glad_glGetProgramInfoLog = (PFNGLGETPROGRAMINFOLOGPROC)load("glGetProgramInfoLog");
+        glad_glGetRenderbufferParameteriv = (PFNGLGETRENDERBUFFERPARAMETERIVPROC)load("glGetRenderbufferParameteriv");
+        glad_glGetShaderiv = (PFNGLGETSHADERIVPROC)load("glGetShaderiv");
+        glad_glGetShaderInfoLog = (PFNGLGETSHADERINFOLOGPROC)load("glGetShaderInfoLog");
+        glad_glGetShaderPrecisionFormat = (PFNGLGETSHADERPRECISIONFORMATPROC)load("glGetShaderPrecisionFormat");
+        glad_glGetShaderSource = (PFNGLGETSHADERSOURCEPROC)load("glGetShaderSource");
+        glad_glGetString = (PFNGLGETSTRINGPROC)load("glGetString");
+        glad_glGetTexParameterfv = (PFNGLGETTEXPARAMETERFVPROC)load("glGetTexParameterfv");
+        glad_glGetTexParameteriv = (PFNGLGETTEXPARAMETERIVPROC)load("glGetTexParameteriv");
+        glad_glGetUniformfv = (PFNGLGETUNIFORMFVPROC)load("glGetUniformfv");
+        glad_glGetUniformiv = (PFNGLGETUNIFORMIVPROC)load("glGetUniformiv");
+        glad_glGetUniformLocation = (PFNGLGETUNIFORMLOCATIONPROC)load("glGetUniformLocation");
+        glad_glGetVertexAttribfv = (PFNGLGETVERTEXATTRIBFVPROC)load("glGetVertexAttribfv");
+        glad_glGetVertexAttribiv = (PFNGLGETVERTEXATTRIBIVPROC)load("glGetVertexAttribiv");
+        glad_glGetVertexAttribPointerv = (PFNGLGETVERTEXATTRIBPOINTERVPROC)load("glGetVertexAttribPointerv");
+        glad_glHint = (PFNGLHINTPROC)load("glHint");
+        glad_glIsBuffer = (PFNGLISBUFFERPROC)load("glIsBuffer");
+        glad_glIsEnabled = (PFNGLISENABLEDPROC)load("glIsEnabled");
+        glad_glIsFramebuffer = (PFNGLISFRAMEBUFFERPROC)load("glIsFramebuffer");
+        glad_glIsProgram = (PFNGLISPROGRAMPROC)load("glIsProgram");
+        glad_glIsRenderbuffer = (PFNGLISRENDERBUFFERPROC)load("glIsRenderbuffer");
+        glad_glIsShader = (PFNGLISSHADERPROC)load("glIsShader");
+        glad_glIsTexture = (PFNGLISTEXTUREPROC)load("glIsTexture");
+        glad_glLineWidth = (PFNGLLINEWIDTHPROC)load("glLineWidth");
+        glad_glLinkProgram = (PFNGLLINKPROGRAMPROC)load("glLinkProgram");
+        glad_glPixelStorei = (PFNGLPIXELSTOREIPROC)load("glPixelStorei");
+        glad_glPolygonOffset = (PFNGLPOLYGONOFFSETPROC)load("glPolygonOffset");
+        glad_glReadPixels = (PFNGLREADPIXELSPROC)load("glReadPixels");
+        glad_glReleaseShaderCompiler = (PFNGLRELEASESHADERCOMPILERPROC)load("glReleaseShaderCompiler");
+        glad_glRenderbufferStorage = (PFNGLRENDERBUFFERSTORAGEPROC)load("glRenderbufferStorage");
+        glad_glSampleCoverage = (PFNGLSAMPLECOVERAGEPROC)load("glSampleCoverage");
+        glad_glScissor = (PFNGLSCISSORPROC)load("glScissor");
+        glad_glShaderBinary = (PFNGLSHADERBINARYPROC)load("glShaderBinary");
+        glad_glShaderSource = (PFNGLSHADERSOURCEPROC)load("glShaderSource");
+        glad_glStencilFunc = (PFNGLSTENCILFUNCPROC)load("glStencilFunc");
+        glad_glStencilFuncSeparate = (PFNGLSTENCILFUNCSEPARATEPROC)load("glStencilFuncSeparate");
+        glad_glStencilMask = (PFNGLSTENCILMASKPROC)load("glStencilMask");
+        glad_glStencilMaskSeparate = (PFNGLSTENCILMASKSEPARATEPROC)load("glStencilMaskSeparate");
+        glad_glStencilOp = (PFNGLSTENCILOPPROC)load("glStencilOp");
+        glad_glStencilOpSeparate = (PFNGLSTENCILOPSEPARATEPROC)load("glStencilOpSeparate");
+        glad_glTexImage2D = (PFNGLTEXIMAGE2DPROC)load("glTexImage2D");
+        glad_glTexParameterf = (PFNGLTEXPARAMETERFPROC)load("glTexParameterf");
+        glad_glTexParameterfv = (PFNGLTEXPARAMETERFVPROC)load("glTexParameterfv");
+        glad_glTexParameteri = (PFNGLTEXPARAMETERIPROC)load("glTexParameteri");
+        glad_glTexParameteriv = (PFNGLTEXPARAMETERIVPROC)load("glTexParameteriv");
+        glad_glTexSubImage2D = (PFNGLTEXSUBIMAGE2DPROC)load("glTexSubImage2D");
+        glad_glUniform1f = (PFNGLUNIFORM1FPROC)load("glUniform1f");
+        glad_glUniform1fv = (PFNGLUNIFORM1FVPROC)load("glUniform1fv");
+        glad_glUniform1i = (PFNGLUNIFORM1IPROC)load("glUniform1i");
+        glad_glUniform1iv = (PFNGLUNIFORM1IVPROC)load("glUniform1iv");
+        glad_glUniform2f = (PFNGLUNIFORM2FPROC)load("glUniform2f");
+        glad_glUniform2fv = (PFNGLUNIFORM2FVPROC)load("glUniform2fv");
+        glad_glUniform2i = (PFNGLUNIFORM2IPROC)load("glUniform2i");
+        glad_glUniform2iv = (PFNGLUNIFORM2IVPROC)load("glUniform2iv");
+        glad_glUniform3f = (PFNGLUNIFORM3FPROC)load("glUniform3f");
+        glad_glUniform3fv = (PFNGLUNIFORM3FVPROC)load("glUniform3fv");
+        glad_glUniform3i = (PFNGLUNIFORM3IPROC)load("glUniform3i");
+        glad_glUniform3iv = (PFNGLUNIFORM3IVPROC)load("glUniform3iv");
+        glad_glUniform4f = (PFNGLUNIFORM4FPROC)load("glUniform4f");
+        glad_glUniform4fv = (PFNGLUNIFORM4FVPROC)load("glUniform4fv");
+        glad_glUniform4i = (PFNGLUNIFORM4IPROC)load("glUniform4i");
+        glad_glUniform4iv = (PFNGLUNIFORM4IVPROC)load("glUniform4iv");
+        glad_glUniformMatrix2fv = (PFNGLUNIFORMMATRIX2FVPROC)load("glUniformMatrix2fv");
+        glad_glUniformMatrix3fv = (PFNGLUNIFORMMATRIX3FVPROC)load("glUniformMatrix3fv");
+        glad_glUniformMatrix4fv = (PFNGLUNIFORMMATRIX4FVPROC)load("glUniformMatrix4fv");
+        glad_glUseProgram = (PFNGLUSEPROGRAMPROC)load("glUseProgram");
+        glad_glValidateProgram = (PFNGLVALIDATEPROGRAMPROC)load("glValidateProgram");
+        glad_glVertexAttrib1f = (PFNGLVERTEXATTRIB1FPROC)load("glVertexAttrib1f");
+        glad_glVertexAttrib1fv = (PFNGLVERTEXATTRIB1FVPROC)load("glVertexAttrib1fv");
+        glad_glVertexAttrib2f = (PFNGLVERTEXATTRIB2FPROC)load("glVertexAttrib2f");
+        glad_glVertexAttrib2fv = (PFNGLVERTEXATTRIB2FVPROC)load("glVertexAttrib2fv");
+        glad_glVertexAttrib3f = (PFNGLVERTEXATTRIB3FPROC)load("glVertexAttrib3f");
+        glad_glVertexAttrib3fv = (PFNGLVERTEXATTRIB3FVPROC)load("glVertexAttrib3fv");
+        glad_glVertexAttrib4f = (PFNGLVERTEXATTRIB4FPROC)load("glVertexAttrib4f");
+        glad_glVertexAttrib4fv = (PFNGLVERTEXATTRIB4FVPROC)load("glVertexAttrib4fv");
+        glad_glVertexAttribPointer = (PFNGLVERTEXATTRIBPOINTERPROC)load("glVertexAttribPointer");
+        glad_glViewport = (PFNGLVIEWPORTPROC)load("glViewport");
+}
+static void load_GL_ES_VERSION_3_0(GLADloadproc load) {
+        if(!GLAD_GL_ES_VERSION_3_0) return;
+        glad_glReadBuffer = (PFNGLREADBUFFERPROC)load("glReadBuffer");
+        glad_glDrawRangeElements = (PFNGLDRAWRANGEELEMENTSPROC)load("glDrawRangeElements");
+        glad_glTexImage3D = (PFNGLTEXIMAGE3DPROC)load("glTexImage3D");
+        glad_glTexSubImage3D = (PFNGLTEXSUBIMAGE3DPROC)load("glTexSubImage3D");
+        glad_glCopyTexSubImage3D = (PFNGLCOPYTEXSUBIMAGE3DPROC)load("glCopyTexSubImage3D");
+        glad_glCompressedTexImage3D = (PFNGLCOMPRESSEDTEXIMAGE3DPROC)load("glCompressedTexImage3D");
+        glad_glCompressedTexSubImage3D = (PFNGLCOMPRESSEDTEXSUBIMAGE3DPROC)load("glCompressedTexSubImage3D");
+        glad_glGenQueries = (PFNGLGENQUERIESPROC)load("glGenQueries");
+        glad_glDeleteQueries = (PFNGLDELETEQUERIESPROC)load("glDeleteQueries");
+        glad_glIsQuery = (PFNGLISQUERYPROC)load("glIsQuery");
+        glad_glBeginQuery = (PFNGLBEGINQUERYPROC)load("glBeginQuery");
+        glad_glEndQuery = (PFNGLENDQUERYPROC)load("glEndQuery");
+        glad_glGetQueryiv = (PFNGLGETQUERYIVPROC)load("glGetQueryiv");
+        glad_glGetQueryObjectuiv = (PFNGLGETQUERYOBJECTUIVPROC)load("glGetQueryObjectuiv");
+        glad_glUnmapBuffer = (PFNGLUNMAPBUFFERPROC)load("glUnmapBuffer");
+        glad_glGetBufferPointerv = (PFNGLGETBUFFERPOINTERVPROC)load("glGetBufferPointerv");
+        glad_glDrawBuffers = (PFNGLDRAWBUFFERSPROC)load("glDrawBuffers");
+        glad_glUniformMatrix2x3fv = (PFNGLUNIFORMMATRIX2X3FVPROC)load("glUniformMatrix2x3fv");
+        glad_glUniformMatrix3x2fv = (PFNGLUNIFORMMATRIX3X2FVPROC)load("glUniformMatrix3x2fv");
+        glad_glUniformMatrix2x4fv = (PFNGLUNIFORMMATRIX2X4FVPROC)load("glUniformMatrix2x4fv");
+        glad_glUniformMatrix4x2fv = (PFNGLUNIFORMMATRIX4X2FVPROC)load("glUniformMatrix4x2fv");
+        glad_glUniformMatrix3x4fv = (PFNGLUNIFORMMATRIX3X4FVPROC)load("glUniformMatrix3x4fv");
+        glad_glUniformMatrix4x3fv = (PFNGLUNIFORMMATRIX4X3FVPROC)load("glUniformMatrix4x3fv");
+        glad_glBlitFramebuffer = (PFNGLBLITFRAMEBUFFERPROC)load("glBlitFramebuffer");
+        glad_glRenderbufferStorageMultisample = (PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC)load("glRenderbufferStorageMultisample");
+        glad_glFramebufferTextureLayer = (PFNGLFRAMEBUFFERTEXTURELAYERPROC)load("glFramebufferTextureLayer");
+        glad_glMapBufferRange = (PFNGLMAPBUFFERRANGEPROC)load("glMapBufferRange");
+        glad_glFlushMappedBufferRange = (PFNGLFLUSHMAPPEDBUFFERRANGEPROC)load("glFlushMappedBufferRange");
+        glad_glBindVertexArray = (PFNGLBINDVERTEXARRAYPROC)load("glBindVertexArray");
+        glad_glDeleteVertexArrays = (PFNGLDELETEVERTEXARRAYSPROC)load("glDeleteVertexArrays");
+        glad_glGenVertexArrays = (PFNGLGENVERTEXARRAYSPROC)load("glGenVertexArrays");
+        glad_glIsVertexArray = (PFNGLISVERTEXARRAYPROC)load("glIsVertexArray");
+        glad_glGetIntegeri_v = (PFNGLGETINTEGERI_VPROC)load("glGetIntegeri_v");
+        glad_glBeginTransformFeedback = (PFNGLBEGINTRANSFORMFEEDBACKPROC)load("glBeginTransformFeedback");
+        glad_glEndTransformFeedback = (PFNGLENDTRANSFORMFEEDBACKPROC)load("glEndTransformFeedback");
+        glad_glBindBufferRange = (PFNGLBINDBUFFERRANGEPROC)load("glBindBufferRange");
+        glad_glBindBufferBase = (PFNGLBINDBUFFERBASEPROC)load("glBindBufferBase");
+        glad_glTransformFeedbackVaryings = (PFNGLTRANSFORMFEEDBACKVARYINGSPROC)load("glTransformFeedbackVaryings");
+        glad_glGetTransformFeedbackVarying = (PFNGLGETTRANSFORMFEEDBACKVARYINGPROC)load("glGetTransformFeedbackVarying");
+        glad_glVertexAttribIPointer = (PFNGLVERTEXATTRIBIPOINTERPROC)load("glVertexAttribIPointer");
+        glad_glGetVertexAttribIiv = (PFNGLGETVERTEXATTRIBIIVPROC)load("glGetVertexAttribIiv");
+        glad_glGetVertexAttribIuiv = (PFNGLGETVERTEXATTRIBIUIVPROC)load("glGetVertexAttribIuiv");
+        glad_glVertexAttribI4i = (PFNGLVERTEXATTRIBI4IPROC)load("glVertexAttribI4i");
+        glad_glVertexAttribI4ui = (PFNGLVERTEXATTRIBI4UIPROC)load("glVertexAttribI4ui");
+        glad_glVertexAttribI4iv = (PFNGLVERTEXATTRIBI4IVPROC)load("glVertexAttribI4iv");
+        glad_glVertexAttribI4uiv = (PFNGLVERTEXATTRIBI4UIVPROC)load("glVertexAttribI4uiv");
+        glad_glGetUniformuiv = (PFNGLGETUNIFORMUIVPROC)load("glGetUniformuiv");
+        glad_glGetFragDataLocation = (PFNGLGETFRAGDATALOCATIONPROC)load("glGetFragDataLocation");
+        glad_glUniform1ui = (PFNGLUNIFORM1UIPROC)load("glUniform1ui");
+        glad_glUniform2ui = (PFNGLUNIFORM2UIPROC)load("glUniform2ui");
+        glad_glUniform3ui = (PFNGLUNIFORM3UIPROC)load("glUniform3ui");
+        glad_glUniform4ui = (PFNGLUNIFORM4UIPROC)load("glUniform4ui");
+        glad_glUniform1uiv = (PFNGLUNIFORM1UIVPROC)load("glUniform1uiv");
+        glad_glUniform2uiv = (PFNGLUNIFORM2UIVPROC)load("glUniform2uiv");
+        glad_glUniform3uiv = (PFNGLUNIFORM3UIVPROC)load("glUniform3uiv");
+        glad_glUniform4uiv = (PFNGLUNIFORM4UIVPROC)load("glUniform4uiv");
+        glad_glClearBufferiv = (PFNGLCLEARBUFFERIVPROC)load("glClearBufferiv");
+        glad_glClearBufferuiv = (PFNGLCLEARBUFFERUIVPROC)load("glClearBufferuiv");
+        glad_glClearBufferfv = (PFNGLCLEARBUFFERFVPROC)load("glClearBufferfv");
+        glad_glClearBufferfi = (PFNGLCLEARBUFFERFIPROC)load("glClearBufferfi");
+        glad_glGetStringi = (PFNGLGETSTRINGIPROC)load("glGetStringi");
+        glad_glCopyBufferSubData = (PFNGLCOPYBUFFERSUBDATAPROC)load("glCopyBufferSubData");
+        glad_glGetUniformIndices = (PFNGLGETUNIFORMINDICESPROC)load("glGetUniformIndices");
+        glad_glGetActiveUniformsiv = (PFNGLGETACTIVEUNIFORMSIVPROC)load("glGetActiveUniformsiv");
+        glad_glGetUniformBlockIndex = (PFNGLGETUNIFORMBLOCKINDEXPROC)load("glGetUniformBlockIndex");
+        glad_glGetActiveUniformBlockiv = (PFNGLGETACTIVEUNIFORMBLOCKIVPROC)load("glGetActiveUniformBlockiv");
+        glad_glGetActiveUniformBlockName = (PFNGLGETACTIVEUNIFORMBLOCKNAMEPROC)load("glGetActiveUniformBlockName");
+        glad_glUniformBlockBinding = (PFNGLUNIFORMBLOCKBINDINGPROC)load("glUniformBlockBinding");
+        glad_glDrawArraysInstanced = (PFNGLDRAWARRAYSINSTANCEDPROC)load("glDrawArraysInstanced");
+        glad_glDrawElementsInstanced = (PFNGLDRAWELEMENTSINSTANCEDPROC)load("glDrawElementsInstanced");
+        glad_glFenceSync = (PFNGLFENCESYNCPROC)load("glFenceSync");
+        glad_glIsSync = (PFNGLISSYNCPROC)load("glIsSync");
+        glad_glDeleteSync = (PFNGLDELETESYNCPROC)load("glDeleteSync");
+        glad_glClientWaitSync = (PFNGLCLIENTWAITSYNCPROC)load("glClientWaitSync");
+        glad_glWaitSync = (PFNGLWAITSYNCPROC)load("glWaitSync");
+        glad_glGetInteger64v = (PFNGLGETINTEGER64VPROC)load("glGetInteger64v");
+        glad_glGetSynciv = (PFNGLGETSYNCIVPROC)load("glGetSynciv");
+        glad_glGetInteger64i_v = (PFNGLGETINTEGER64I_VPROC)load("glGetInteger64i_v");
+        glad_glGetBufferParameteri64v = (PFNGLGETBUFFERPARAMETERI64VPROC)load("glGetBufferParameteri64v");
+        glad_glGenSamplers = (PFNGLGENSAMPLERSPROC)load("glGenSamplers");
+        glad_glDeleteSamplers = (PFNGLDELETESAMPLERSPROC)load("glDeleteSamplers");
+        glad_glIsSampler = (PFNGLISSAMPLERPROC)load("glIsSampler");
+        glad_glBindSampler = (PFNGLBINDSAMPLERPROC)load("glBindSampler");
+        glad_glSamplerParameteri = (PFNGLSAMPLERPARAMETERIPROC)load("glSamplerParameteri");
+        glad_glSamplerParameteriv = (PFNGLSAMPLERPARAMETERIVPROC)load("glSamplerParameteriv");
+        glad_glSamplerParameterf = (PFNGLSAMPLERPARAMETERFPROC)load("glSamplerParameterf");
+        glad_glSamplerParameterfv = (PFNGLSAMPLERPARAMETERFVPROC)load("glSamplerParameterfv");
+        glad_glGetSamplerParameteriv = (PFNGLGETSAMPLERPARAMETERIVPROC)load("glGetSamplerParameteriv");
+        glad_glGetSamplerParameterfv = (PFNGLGETSAMPLERPARAMETERFVPROC)load("glGetSamplerParameterfv");
+        glad_glVertexAttribDivisor = (PFNGLVERTEXATTRIBDIVISORPROC)load("glVertexAttribDivisor");
+        glad_glBindTransformFeedback = (PFNGLBINDTRANSFORMFEEDBACKPROC)load("glBindTransformFeedback");
+        glad_glDeleteTransformFeedbacks = (PFNGLDELETETRANSFORMFEEDBACKSPROC)load("glDeleteTransformFeedbacks");
+        glad_glGenTransformFeedbacks = (PFNGLGENTRANSFORMFEEDBACKSPROC)load("glGenTransformFeedbacks");
+        glad_glIsTransformFeedback = (PFNGLISTRANSFORMFEEDBACKPROC)load("glIsTransformFeedback");
+        glad_glPauseTransformFeedback = (PFNGLPAUSETRANSFORMFEEDBACKPROC)load("glPauseTransformFeedback");
+        glad_glResumeTransformFeedback = (PFNGLRESUMETRANSFORMFEEDBACKPROC)load("glResumeTransformFeedback");
+        glad_glGetProgramBinary = (PFNGLGETPROGRAMBINARYPROC)load("glGetProgramBinary");
+        glad_glProgramBinary = (PFNGLPROGRAMBINARYPROC)load("glProgramBinary");
+        glad_glProgramParameteri = (PFNGLPROGRAMPARAMETERIPROC)load("glProgramParameteri");
+        glad_glInvalidateFramebuffer = (PFNGLINVALIDATEFRAMEBUFFERPROC)load("glInvalidateFramebuffer");
+        glad_glInvalidateSubFramebuffer = (PFNGLINVALIDATESUBFRAMEBUFFERPROC)load("glInvalidateSubFramebuffer");
+        glad_glTexStorage2D = (PFNGLTEXSTORAGE2DPROC)load("glTexStorage2D");
+        glad_glTexStorage3D = (PFNGLTEXSTORAGE3DPROC)load("glTexStorage3D");
+        glad_glGetInternalformativ = (PFNGLGETINTERNALFORMATIVPROC)load("glGetInternalformativ");
+}
+static void load_GL_ES_VERSION_3_1(GLADloadproc load) {
+        if(!GLAD_GL_ES_VERSION_3_1) return;
+        glad_glDispatchCompute = (PFNGLDISPATCHCOMPUTEPROC)load("glDispatchCompute");
+        glad_glDispatchComputeIndirect = (PFNGLDISPATCHCOMPUTEINDIRECTPROC)load("glDispatchComputeIndirect");
+        glad_glDrawArraysIndirect = (PFNGLDRAWARRAYSINDIRECTPROC)load("glDrawArraysIndirect");
+        glad_glDrawElementsIndirect = (PFNGLDRAWELEMENTSINDIRECTPROC)load("glDrawElementsIndirect");
+        glad_glFramebufferParameteri = (PFNGLFRAMEBUFFERPARAMETERIPROC)load("glFramebufferParameteri");
+        glad_glGetFramebufferParameteriv = (PFNGLGETFRAMEBUFFERPARAMETERIVPROC)load("glGetFramebufferParameteriv");
+        glad_glGetProgramInterfaceiv = (PFNGLGETPROGRAMINTERFACEIVPROC)load("glGetProgramInterfaceiv");
+        glad_glGetProgramResourceIndex = (PFNGLGETPROGRAMRESOURCEINDEXPROC)load("glGetProgramResourceIndex");
+        glad_glGetProgramResourceName = (PFNGLGETPROGRAMRESOURCENAMEPROC)load("glGetProgramResourceName");
+        glad_glGetProgramResourceiv = (PFNGLGETPROGRAMRESOURCEIVPROC)load("glGetProgramResourceiv");
+        glad_glGetProgramResourceLocation = (PFNGLGETPROGRAMRESOURCELOCATIONPROC)load("glGetProgramResourceLocation");
+        glad_glUseProgramStages = (PFNGLUSEPROGRAMSTAGESPROC)load("glUseProgramStages");
+        glad_glActiveShaderProgram = (PFNGLACTIVESHADERPROGRAMPROC)load("glActiveShaderProgram");
+        glad_glCreateShaderProgramv = (PFNGLCREATESHADERPROGRAMVPROC)load("glCreateShaderProgramv");
+        glad_glBindProgramPipeline = (PFNGLBINDPROGRAMPIPELINEPROC)load("glBindProgramPipeline");
+        glad_glDeleteProgramPipelines = (PFNGLDELETEPROGRAMPIPELINESPROC)load("glDeleteProgramPipelines");
+        glad_glGenProgramPipelines = (PFNGLGENPROGRAMPIPELINESPROC)load("glGenProgramPipelines");
+        glad_glIsProgramPipeline = (PFNGLISPROGRAMPIPELINEPROC)load("glIsProgramPipeline");
+        glad_glGetProgramPipelineiv = (PFNGLGETPROGRAMPIPELINEIVPROC)load("glGetProgramPipelineiv");
+        glad_glProgramUniform1i = (PFNGLPROGRAMUNIFORM1IPROC)load("glProgramUniform1i");
+        glad_glProgramUniform2i = (PFNGLPROGRAMUNIFORM2IPROC)load("glProgramUniform2i");
+        glad_glProgramUniform3i = (PFNGLPROGRAMUNIFORM3IPROC)load("glProgramUniform3i");
+        glad_glProgramUniform4i = (PFNGLPROGRAMUNIFORM4IPROC)load("glProgramUniform4i");
+        glad_glProgramUniform1ui = (PFNGLPROGRAMUNIFORM1UIPROC)load("glProgramUniform1ui");
+        glad_glProgramUniform2ui = (PFNGLPROGRAMUNIFORM2UIPROC)load("glProgramUniform2ui");
+        glad_glProgramUniform3ui = (PFNGLPROGRAMUNIFORM3UIPROC)load("glProgramUniform3ui");
+        glad_glProgramUniform4ui = (PFNGLPROGRAMUNIFORM4UIPROC)load("glProgramUniform4ui");
+        glad_glProgramUniform1f = (PFNGLPROGRAMUNIFORM1FPROC)load("glProgramUniform1f");
+        glad_glProgramUniform2f = (PFNGLPROGRAMUNIFORM2FPROC)load("glProgramUniform2f");
+        glad_glProgramUniform3f = (PFNGLPROGRAMUNIFORM3FPROC)load("glProgramUniform3f");
+        glad_glProgramUniform4f = (PFNGLPROGRAMUNIFORM4FPROC)load("glProgramUniform4f");
+        glad_glProgramUniform1iv = (PFNGLPROGRAMUNIFORM1IVPROC)load("glProgramUniform1iv");
+        glad_glProgramUniform2iv = (PFNGLPROGRAMUNIFORM2IVPROC)load("glProgramUniform2iv");
+        glad_glProgramUniform3iv = (PFNGLPROGRAMUNIFORM3IVPROC)load("glProgramUniform3iv");
+        glad_glProgramUniform4iv = (PFNGLPROGRAMUNIFORM4IVPROC)load("glProgramUniform4iv");
+        glad_glProgramUniform1uiv = (PFNGLPROGRAMUNIFORM1UIVPROC)load("glProgramUniform1uiv");
+        glad_glProgramUniform2uiv = (PFNGLPROGRAMUNIFORM2UIVPROC)load("glProgramUniform2uiv");
+        glad_glProgramUniform3uiv = (PFNGLPROGRAMUNIFORM3UIVPROC)load("glProgramUniform3uiv");
+        glad_glProgramUniform4uiv = (PFNGLPROGRAMUNIFORM4UIVPROC)load("glProgramUniform4uiv");
+        glad_glProgramUniform1fv = (PFNGLPROGRAMUNIFORM1FVPROC)load("glProgramUniform1fv");
+        glad_glProgramUniform2fv = (PFNGLPROGRAMUNIFORM2FVPROC)load("glProgramUniform2fv");
+        glad_glProgramUniform3fv = (PFNGLPROGRAMUNIFORM3FVPROC)load("glProgramUniform3fv");
+        glad_glProgramUniform4fv = (PFNGLPROGRAMUNIFORM4FVPROC)load("glProgramUniform4fv");
+        glad_glProgramUniformMatrix2fv = (PFNGLPROGRAMUNIFORMMATRIX2FVPROC)load("glProgramUniformMatrix2fv");
+        glad_glProgramUniformMatrix3fv = (PFNGLPROGRAMUNIFORMMATRIX3FVPROC)load("glProgramUniformMatrix3fv");
+        glad_glProgramUniformMatrix4fv = (PFNGLPROGRAMUNIFORMMATRIX4FVPROC)load("glProgramUniformMatrix4fv");
+        glad_glProgramUniformMatrix2x3fv = (PFNGLPROGRAMUNIFORMMATRIX2X3FVPROC)load("glProgramUniformMatrix2x3fv");
+        glad_glProgramUniformMatrix3x2fv = (PFNGLPROGRAMUNIFORMMATRIX3X2FVPROC)load("glProgramUniformMatrix3x2fv");
+        glad_glProgramUniformMatrix2x4fv = (PFNGLPROGRAMUNIFORMMATRIX2X4FVPROC)load("glProgramUniformMatrix2x4fv");
+        glad_glProgramUniformMatrix4x2fv = (PFNGLPROGRAMUNIFORMMATRIX4X2FVPROC)load("glProgramUniformMatrix4x2fv");
+        glad_glProgramUniformMatrix3x4fv = (PFNGLPROGRAMUNIFORMMATRIX3X4FVPROC)load("glProgramUniformMatrix3x4fv");
+        glad_glProgramUniformMatrix4x3fv = (PFNGLPROGRAMUNIFORMMATRIX4X3FVPROC)load("glProgramUniformMatrix4x3fv");
+        glad_glValidateProgramPipeline = (PFNGLVALIDATEPROGRAMPIPELINEPROC)load("glValidateProgramPipeline");
+        glad_glGetProgramPipelineInfoLog = (PFNGLGETPROGRAMPIPELINEINFOLOGPROC)load("glGetProgramPipelineInfoLog");
+        glad_glBindImageTexture = (PFNGLBINDIMAGETEXTUREPROC)load("glBindImageTexture");
+        glad_glGetBooleani_v = (PFNGLGETBOOLEANI_VPROC)load("glGetBooleani_v");
+        glad_glMemoryBarrier = (PFNGLMEMORYBARRIERPROC)load("glMemoryBarrier");
+        glad_glMemoryBarrierByRegion = (PFNGLMEMORYBARRIERBYREGIONPROC)load("glMemoryBarrierByRegion");
+        glad_glTexStorage2DMultisample = (PFNGLTEXSTORAGE2DMULTISAMPLEPROC)load("glTexStorage2DMultisample");
+        glad_glGetMultisamplefv = (PFNGLGETMULTISAMPLEFVPROC)load("glGetMultisamplefv");
+        glad_glSampleMaski = (PFNGLSAMPLEMASKIPROC)load("glSampleMaski");
+        glad_glGetTexLevelParameteriv = (PFNGLGETTEXLEVELPARAMETERIVPROC)load("glGetTexLevelParameteriv");
+        glad_glGetTexLevelParameterfv = (PFNGLGETTEXLEVELPARAMETERFVPROC)load("glGetTexLevelParameterfv");
+        glad_glBindVertexBuffer = (PFNGLBINDVERTEXBUFFERPROC)load("glBindVertexBuffer");
+        glad_glVertexAttribFormat = (PFNGLVERTEXATTRIBFORMATPROC)load("glVertexAttribFormat");
+        glad_glVertexAttribIFormat = (PFNGLVERTEXATTRIBIFORMATPROC)load("glVertexAttribIFormat");
+        glad_glVertexAttribBinding = (PFNGLVERTEXATTRIBBINDINGPROC)load("glVertexAttribBinding");
+        glad_glVertexBindingDivisor = (PFNGLVERTEXBINDINGDIVISORPROC)load("glVertexBindingDivisor");
+}
+static void load_GL_ES_VERSION_3_2(GLADloadproc load) {
+        if(!GLAD_GL_ES_VERSION_3_2) return;
+        glad_glBlendBarrier = (PFNGLBLENDBARRIERPROC)load("glBlendBarrier");
+        glad_glCopyImageSubData = (PFNGLCOPYIMAGESUBDATAPROC)load("glCopyImageSubData");
+        glad_glDebugMessageControl = (PFNGLDEBUGMESSAGECONTROLPROC)load("glDebugMessageControl");
+        glad_glDebugMessageInsert = (PFNGLDEBUGMESSAGEINSERTPROC)load("glDebugMessageInsert");
+        glad_glDebugMessageCallback = (PFNGLDEBUGMESSAGECALLBACKPROC)load("glDebugMessageCallback");
+        glad_glGetDebugMessageLog = (PFNGLGETDEBUGMESSAGELOGPROC)load("glGetDebugMessageLog");
+        glad_glPushDebugGroup = (PFNGLPUSHDEBUGGROUPPROC)load("glPushDebugGroup");
+        glad_glPopDebugGroup = (PFNGLPOPDEBUGGROUPPROC)load("glPopDebugGroup");
+        glad_glObjectLabel = (PFNGLOBJECTLABELPROC)load("glObjectLabel");
+        glad_glGetObjectLabel = (PFNGLGETOBJECTLABELPROC)load("glGetObjectLabel");
+        glad_glObjectPtrLabel = (PFNGLOBJECTPTRLABELPROC)load("glObjectPtrLabel");
+        glad_glGetObjectPtrLabel = (PFNGLGETOBJECTPTRLABELPROC)load("glGetObjectPtrLabel");
+        glad_glGetPointerv = (PFNGLGETPOINTERVPROC)load("glGetPointerv");
+        glad_glEnablei = (PFNGLENABLEIPROC)load("glEnablei");
+        glad_glDisablei = (PFNGLDISABLEIPROC)load("glDisablei");
+        glad_glBlendEquationi = (PFNGLBLENDEQUATIONIPROC)load("glBlendEquationi");
+        glad_glBlendEquationSeparatei = (PFNGLBLENDEQUATIONSEPARATEIPROC)load("glBlendEquationSeparatei");
+        glad_glBlendFunci = (PFNGLBLENDFUNCIPROC)load("glBlendFunci");
+        glad_glBlendFuncSeparatei = (PFNGLBLENDFUNCSEPARATEIPROC)load("glBlendFuncSeparatei");
+        glad_glColorMaski = (PFNGLCOLORMASKIPROC)load("glColorMaski");
+        glad_glIsEnabledi = (PFNGLISENABLEDIPROC)load("glIsEnabledi");
+        glad_glDrawElementsBaseVertex = (PFNGLDRAWELEMENTSBASEVERTEXPROC)load("glDrawElementsBaseVertex");
+        glad_glDrawRangeElementsBaseVertex = (PFNGLDRAWRANGEELEMENTSBASEVERTEXPROC)load("glDrawRangeElementsBaseVertex");
+        glad_glDrawElementsInstancedBaseVertex = (PFNGLDRAWELEMENTSINSTANCEDBASEVERTEXPROC)load("glDrawElementsInstancedBaseVertex");
+        glad_glFramebufferTexture = (PFNGLFRAMEBUFFERTEXTUREPROC)load("glFramebufferTexture");
+        glad_glPrimitiveBoundingBox = (PFNGLPRIMITIVEBOUNDINGBOXPROC)load("glPrimitiveBoundingBox");
+        glad_glGetGraphicsResetStatus = (PFNGLGETGRAPHICSRESETSTATUSPROC)load("glGetGraphicsResetStatus");
+        glad_glReadnPixels = (PFNGLREADNPIXELSPROC)load("glReadnPixels");
+        glad_glGetnUniformfv = (PFNGLGETNUNIFORMFVPROC)load("glGetnUniformfv");
+        glad_glGetnUniformiv = (PFNGLGETNUNIFORMIVPROC)load("glGetnUniformiv");
+        glad_glGetnUniformuiv = (PFNGLGETNUNIFORMUIVPROC)load("glGetnUniformuiv");
+        glad_glMinSampleShading = (PFNGLMINSAMPLESHADINGPROC)load("glMinSampleShading");
+        glad_glPatchParameteri = (PFNGLPATCHPARAMETERIPROC)load("glPatchParameteri");
+        glad_glTexParameterIiv = (PFNGLTEXPARAMETERIIVPROC)load("glTexParameterIiv");
+        glad_glTexParameterIuiv = (PFNGLTEXPARAMETERIUIVPROC)load("glTexParameterIuiv");
+        glad_glGetTexParameterIiv = (PFNGLGETTEXPARAMETERIIVPROC)load("glGetTexParameterIiv");
+        glad_glGetTexParameterIuiv = (PFNGLGETTEXPARAMETERIUIVPROC)load("glGetTexParameterIuiv");
+        glad_glSamplerParameterIiv = (PFNGLSAMPLERPARAMETERIIVPROC)load("glSamplerParameterIiv");
+        glad_glSamplerParameterIuiv = (PFNGLSAMPLERPARAMETERIUIVPROC)load("glSamplerParameterIuiv");
+        glad_glGetSamplerParameterIiv = (PFNGLGETSAMPLERPARAMETERIIVPROC)load("glGetSamplerParameterIiv");
+        glad_glGetSamplerParameterIuiv = (PFNGLGETSAMPLERPARAMETERIUIVPROC)load("glGetSamplerParameterIuiv");
+        glad_glTexBuffer = (PFNGLTEXBUFFERPROC)load("glTexBuffer");
+        glad_glTexBufferRange = (PFNGLTEXBUFFERRANGEPROC)load("glTexBufferRange");
+        glad_glTexStorage3DMultisample = (PFNGLTEXSTORAGE3DMULTISAMPLEPROC)load("glTexStorage3DMultisample");
+}
+static int find_extensionsGLES2(void) {
+        if (!get_exts()) return 0;
+        (void)&has_ext;
+        free_exts();
+        return 1;
+}
+
+static void find_coreGLES2(void) {
+
+    /* Thank you @elmindreda
+     * https://github.com/elmindreda/greg/blob/master/templates/greg.c.in#L176
+     * https://github.com/glfw/glfw/blob/master/src/context.c#L36
+     */
+    int i, major, minor;
+
+    const char* version;
+    const char* prefixes[] = {
+        "OpenGL ES-CM ",
+        "OpenGL ES-CL ",
+        "OpenGL ES ",
+        NULL
+    };
+
+    version = (const char*) glGetString(GL_VERSION);
+    if (!version) return;
+
+    for (i = 0;  prefixes[i];  i++) {
+        const size_t length = strlen(prefixes[i]);
+        if (strncmp(version, prefixes[i], length) == 0) {
+            version += length;
+            break;
+        }
+    }
+
+/* PR #18 */
+#ifdef _MSC_VER
+    sscanf_s(version, "%d.%d", &major, &minor);
+#else
+    sscanf(version, "%d.%d", &major, &minor);
+#endif
+
+    GLVersion.major = major; GLVersion.minor = minor;
+    max_loaded_major = major; max_loaded_minor = minor;
+        GLAD_GL_ES_VERSION_2_0 = (major == 2 && minor >= 0) || major > 2;
+        GLAD_GL_ES_VERSION_3_0 = (major == 3 && minor >= 0) || major > 3;
+        GLAD_GL_ES_VERSION_3_1 = (major == 3 && minor >= 1) || major > 3;
+        GLAD_GL_ES_VERSION_3_2 = (major == 3 && minor >= 2) || major > 3;
+        if (GLVersion.major > 3 || (GLVersion.major >= 3 && GLVersion.minor >= 2)) {
+                max_loaded_major = 3;
+                max_loaded_minor = 2;
+        }
+}
+
+int gladLoadGLES2Loader(GLADloadproc load) {
+        GLVersion.major = 0; GLVersion.minor = 0;
+        glGetString = (PFNGLGETSTRINGPROC)load("glGetString");
+        if(glGetString == NULL) return 0;
+        if(glGetString(GL_VERSION) == NULL) return 0;
+        find_coreGLES2();
+        load_GL_ES_VERSION_2_0(load);
+        load_GL_ES_VERSION_3_0(load);
+        load_GL_ES_VERSION_3_1(load);
+        load_GL_ES_VERSION_3_2(load);
+
+        if (!find_extensionsGLES2()) return 0;
+        return GLVersion.major != 0 || GLVersion.minor != 0;
+}
+
diff --git a/gfx/contrib/stb/CMakeLists.txt b/gfx/contrib/stb/CMakeLists.txt
new file mode 100644
index 0000000..8cee003
--- /dev/null
+++ b/gfx/contrib/stb/CMakeLists.txt
@@ -0,0 +1,8 @@
+cmake_minimum_required(VERSION 3.16)
+
+project(stb)
+
+add_library(stb INTERFACE)
+
+target_include_directories(stb INTERFACE
+  ${CMAKE_CURRENT_SOURCE_DIR})
diff --git a/gfx/contrib/stb/stb_image.h b/gfx/contrib/stb/stb_image.h
new file mode 100644
index 0000000..97038e6
--- /dev/null
+++ b/gfx/contrib/stb/stb_image.h
@@ -0,0 +1,7762 @@
+/* stb_image - v2.26 - public domain image loader - http://nothings.org/stb
+                                  no warranty implied; use at your own risk
+
+   Do this:
+      #define STB_IMAGE_IMPLEMENTATION
+   before you include this file in *one* C or C++ file to create the implementation.
+
+   // i.e. it should look like this:
+   #include ...
+   #include ...
+   #include ...
+   #define STB_IMAGE_IMPLEMENTATION
+   #include "stb_image.h"
+
+   You can #define STBI_ASSERT(x) before the #include to avoid using assert.h.
+   And #define STBI_MALLOC, STBI_REALLOC, and STBI_FREE to avoid using malloc,realloc,free
+
+
+   QUICK NOTES:
+      Primarily of interest to game developers and other people who can
+          avoid problematic images and only need the trivial interface
+
+      JPEG baseline & progressive (12 bpc/arithmetic not supported, same as stock IJG lib)
+      PNG 1/2/4/8/16-bit-per-channel
+
+      TGA (not sure what subset, if a subset)
+      BMP non-1bpp, non-RLE
+      PSD (composited view only, no extra channels, 8/16 bit-per-channel)
+
+      GIF (*comp always reports as 4-channel)
+      HDR (radiance rgbE format)
+      PIC (Softimage PIC)
+      PNM (PPM and PGM binary only)
+
+      Animated GIF still needs a proper API, but here's one way to do it:
+          http://gist.github.com/urraka/685d9a6340b26b830d49
+
+      - decode from memory or through FILE (define STBI_NO_STDIO to remove code)
+      - decode from arbitrary I/O callbacks
+      - SIMD acceleration on x86/x64 (SSE2) and ARM (NEON)
+
+   Full documentation under "DOCUMENTATION" below.
+
+
+LICENSE
+
+  See end of file for license information.
+
+RECENT REVISION HISTORY:
+
+      2.26  (2020-07-13) many minor fixes
+      2.25  (2020-02-02) fix warnings
+      2.24  (2020-02-02) fix warnings; thread-local failure_reason and flip_vertically
+      2.23  (2019-08-11) fix clang static analysis warning
+      2.22  (2019-03-04) gif fixes, fix warnings
+      2.21  (2019-02-25) fix typo in comment
+      2.20  (2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs
+      2.19  (2018-02-11) fix warning
+      2.18  (2018-01-30) fix warnings
+      2.17  (2018-01-29) bugfix, 1-bit BMP, 16-bitness query, fix warnings
+      2.16  (2017-07-23) all functions have 16-bit variants; optimizations; bugfixes
+      2.15  (2017-03-18) fix png-1,2,4; all Imagenet JPGs; no runtime SSE detection on GCC
+      2.14  (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs
+      2.13  (2016-12-04) experimental 16-bit API, only for PNG so far; fixes
+      2.12  (2016-04-02) fix typo in 2.11 PSD fix that caused crashes
+      2.11  (2016-04-02) 16-bit PNGS; enable SSE2 in non-gcc x64
+                         RGB-format JPEG; remove white matting in PSD;
+                         allocate large structures on the stack;
+                         correct channel count for PNG & BMP
+      2.10  (2016-01-22) avoid warning introduced in 2.09
+      2.09  (2016-01-16) 16-bit TGA; comments in PNM files; STBI_REALLOC_SIZED
+
+   See end of file for full revision history.
+
+
+ ============================    Contributors    =========================
+
+ Image formats                          Extensions, features
+    Sean Barrett (jpeg, png, bmp)          Jetro Lauha (stbi_info)
+    Nicolas Schulz (hdr, psd)              Martin "SpartanJ" Golini (stbi_info)
+    Jonathan Dummer (tga)                  James "moose2000" Brown (iPhone PNG)
+    Jean-Marc Lienher (gif)                Ben "Disch" Wenger (io callbacks)
+    Tom Seddon (pic)                       Omar Cornut (1/2/4-bit PNG)
+    Thatcher Ulrich (psd)                  Nicolas Guillemot (vertical flip)
+    Ken Miller (pgm, ppm)                  Richard Mitton (16-bit PSD)
+    github:urraka (animated gif)           Junggon Kim (PNM comments)
+    Christopher Forseth (animated gif)     Daniel Gibson (16-bit TGA)
+                                           socks-the-fox (16-bit PNG)
+                                           Jeremy Sawicki (handle all ImageNet JPGs)
+ Optimizations & bugfixes                  Mikhail Morozov (1-bit BMP)
+    Fabian "ryg" Giesen                    Anael Seghezzi (is-16-bit query)
+    Arseny Kapoulkine
+    John-Mark Allen
+    Carmelo J Fdez-Aguera
+
+ Bug & warning fixes
+    Marc LeBlanc            David Woo          Guillaume George     Martins Mozeiko
+    Christpher Lloyd        Jerry Jansson      Joseph Thomson       Blazej Dariusz Roszkowski
+    Phil Jordan                                Dave Moore           Roy Eltham
+    Hayaki Saito            Nathan Reed        Won Chun
+    Luke Graham             Johan Duparc       Nick Verigakis       the Horde3D community
+    Thomas Ruf              Ronny Chevalier                         github:rlyeh
+    Janez Zemva             John Bartholomew   Michal Cichon        github:romigrou
+    Jonathan Blow           Ken Hamada         Tero Hanninen        github:svdijk
+                            Laurent Gomila     Cort Stratton        github:snagar
+    Aruelien Pocheville     Sergio Gonzalez    Thibault Reuille     github:Zelex
+    Cass Everitt            Ryamond Barbiero                        github:grim210
+    Paul Du Bois            Engin Manap        Aldo Culquicondor    github:sammyhw
+    Philipp Wiesemann       Dale Weiler        Oriol Ferrer Mesia   github:phprus
+    Josh Tobin                                 Matthew Gregan       github:poppolopoppo
+    Julian Raschke          Gregory Mullen     Christian Floisand   github:darealshinji
+    Baldur Karlsson         Kevin Schmidt      JR Smith             github:Michaelangel007
+                            Brad Weinberger    Matvey Cherevko      [reserved]
+    Luca Sas                Alexander Veselov  Zack Middleton       [reserved]
+    Ryan C. Gordon          [reserved]                              [reserved]
+                     DO NOT ADD YOUR NAME HERE
+
+  To add your name to the credits, pick a random blank space in the middle and fill it.
+  80% of merge conflicts on stb PRs are due to people adding their name at the end
+  of the credits.
+*/
+
+#ifndef STBI_INCLUDE_STB_IMAGE_H
+#define STBI_INCLUDE_STB_IMAGE_H
+
+// DOCUMENTATION
+//
+// Limitations:
+//    - no 12-bit-per-channel JPEG
+//    - no JPEGs with arithmetic coding
+//    - GIF always returns *comp=4
+//
+// Basic usage (see HDR discussion below for HDR usage):
+//    int x,y,n;
+//    unsigned char *data = stbi_load(filename, &x, &y, &n, 0);
+//    // ... process data if not NULL ...
+//    // ... x = width, y = height, n = # 8-bit components per pixel ...
+//    // ... replace '0' with '1'..'4' to force that many components per pixel
+//    // ... but 'n' will always be the number that it would have been if you said 0
+//    stbi_image_free(data)
+//
+// Standard parameters:
+//    int *x                 -- outputs image width in pixels
+//    int *y                 -- outputs image height in pixels
+//    int *channels_in_file  -- outputs # of image components in image file
+//    int desired_channels   -- if non-zero, # of image components requested in result
+//
+// The return value from an image loader is an 'unsigned char *' which points
+// to the pixel data, or NULL on an allocation failure or if the image is
+// corrupt or invalid. The pixel data consists of *y scanlines of *x pixels,
+// with each pixel consisting of N interleaved 8-bit components; the first
+// pixel pointed to is top-left-most in the image. There is no padding between
+// image scanlines or between pixels, regardless of format. The number of
+// components N is 'desired_channels' if desired_channels is non-zero, or
+// *channels_in_file otherwise. If desired_channels is non-zero,
+// *channels_in_file has the number of components that _would_ have been
+// output otherwise. E.g. if you set desired_channels to 4, you will always
+// get RGBA output, but you can check *channels_in_file to see if it's trivially
+// opaque because e.g. there were only 3 channels in the source image.
+//
+// An output image with N components has the following components interleaved
+// in this order in each pixel:
+//
+//     N=#comp     components
+//       1           grey
+//       2           grey, alpha
+//       3           red, green, blue
+//       4           red, green, blue, alpha
+//
+// If image loading fails for any reason, the return value will be NULL,
+// and *x, *y, *channels_in_file will be unchanged. The function
+// stbi_failure_reason() can be queried for an extremely brief, end-user
+// unfriendly explanation of why the load failed. Define STBI_NO_FAILURE_STRINGS
+// to avoid compiling these strings at all, and STBI_FAILURE_USERMSG to get slightly
+// more user-friendly ones.
+//
+// Paletted PNG, BMP, GIF, and PIC images are automatically depalettized.
+//
+// ===========================================================================
+//
+// UNICODE:
+//
+//   If compiling for Windows and you wish to use Unicode filenames, compile
+//   with
+//       #define STBI_WINDOWS_UTF8
+//   and pass utf8-encoded filenames. Call stbi_convert_wchar_to_utf8 to convert
+//   Windows wchar_t filenames to utf8.
+//
+// ===========================================================================
+//
+// Philosophy
+//
+// stb libraries are designed with the following priorities:
+//
+//    1. easy to use
+//    2. easy to maintain
+//    3. good performance
+//
+// Sometimes I let "good performance" creep up in priority over "easy to maintain",
+// and for best performance I may provide less-easy-to-use APIs that give higher
+// performance, in addition to the easy-to-use ones. Nevertheless, it's important
+// to keep in mind that from the standpoint of you, a client of this library,
+// all you care about is #1 and #3, and stb libraries DO NOT emphasize #3 above all.
+//
+// Some secondary priorities arise directly from the first two, some of which
+// provide more explicit reasons why performance can't be emphasized.
+//
+//    - Portable ("ease of use")
+//    - Small source code footprint ("easy to maintain")
+//    - No dependencies ("ease of use")
+//
+// ===========================================================================
+//
+// I/O callbacks
+//
+// I/O callbacks allow you to read from arbitrary sources, like packaged
+// files or some other source. Data read from callbacks are processed
+// through a small internal buffer (currently 128 bytes) to try to reduce
+// overhead.
+//
+// The three functions you must define are "read" (reads some bytes of data),
+// "skip" (skips some bytes of data), "eof" (reports if the stream is at the end).
+//
+// ===========================================================================
+//
+// SIMD support
+//
+// The JPEG decoder will try to automatically use SIMD kernels on x86 when
+// supported by the compiler. For ARM Neon support, you must explicitly
+// request it.
+//
+// (The old do-it-yourself SIMD API is no longer supported in the current
+// code.)
+//
+// On x86, SSE2 will automatically be used when available based on a run-time
+// test; if not, the generic C versions are used as a fall-back. On ARM targets,
+// the typical path is to have separate builds for NEON and non-NEON devices
+// (at least this is true for iOS and Android). Therefore, the NEON support is
+// toggled by a build flag: define STBI_NEON to get NEON loops.
+//
+// If for some reason you do not want to use any of SIMD code, or if
+// you have issues compiling it, you can disable it entirely by
+// defining STBI_NO_SIMD.
+//
+// ===========================================================================
+//
+// HDR image support   (disable by defining STBI_NO_HDR)
+//
+// stb_image supports loading HDR images in general, and currently the Radiance
+// .HDR file format specifically. You can still load any file through the existing
+// interface; if you attempt to load an HDR file, it will be automatically remapped
+// to LDR, assuming gamma 2.2 and an arbitrary scale factor defaulting to 1;
+// both of these constants can be reconfigured through this interface:
+//
+//     stbi_hdr_to_ldr_gamma(2.2f);
+//     stbi_hdr_to_ldr_scale(1.0f);
+//
+// (note, do not use _inverse_ constants; stbi_image will invert them
+// appropriately).
+//
+// Additionally, there is a new, parallel interface for loading files as
+// (linear) floats to preserve the full dynamic range:
+//
+//    float *data = stbi_loadf(filename, &x, &y, &n, 0);
+//
+// If you load LDR images through this interface, those images will
+// be promoted to floating point values, run through the inverse of
+// constants corresponding to the above:
+//
+//     stbi_ldr_to_hdr_scale(1.0f);
+//     stbi_ldr_to_hdr_gamma(2.2f);
+//
+// Finally, given a filename (or an open file or memory block--see header
+// file for details) containing image data, you can query for the "most
+// appropriate" interface to use (that is, whether the image is HDR or
+// not), using:
+//
+//     stbi_is_hdr(char *filename);
+//
+// ===========================================================================
+//
+// iPhone PNG support:
+//
+// By default we convert iphone-formatted PNGs back to RGB, even though
+// they are internally encoded differently. You can disable this conversion
+// by calling stbi_convert_iphone_png_to_rgb(0), in which case
+// you will always just get the native iphone "format" through (which
+// is BGR stored in RGB).
+//
+// Call stbi_set_unpremultiply_on_load(1) as well to force a divide per
+// pixel to remove any premultiplied alpha *only* if the image file explicitly
+// says there's premultiplied data (currently only happens in iPhone images,
+// and only if iPhone convert-to-rgb processing is on).
+//
+// ===========================================================================
+//
+// ADDITIONAL CONFIGURATION
+//
+//  - You can suppress implementation of any of the decoders to reduce
+//    your code footprint by #defining one or more of the following
+//    symbols before creating the implementation.
+//
+//        STBI_NO_JPEG
+//        STBI_NO_PNG
+//        STBI_NO_BMP
+//        STBI_NO_PSD
+//        STBI_NO_TGA
+//        STBI_NO_GIF
+//        STBI_NO_HDR
+//        STBI_NO_PIC
+//        STBI_NO_PNM   (.ppm and .pgm)
+//
+//  - You can request *only* certain decoders and suppress all other ones
+//    (this will be more forward-compatible, as addition of new decoders
+//    doesn't require you to disable them explicitly):
+//
+//        STBI_ONLY_JPEG
+//        STBI_ONLY_PNG
+//        STBI_ONLY_BMP
+//        STBI_ONLY_PSD
+//        STBI_ONLY_TGA
+//        STBI_ONLY_GIF
+//        STBI_ONLY_HDR
+//        STBI_ONLY_PIC
+//        STBI_ONLY_PNM   (.ppm and .pgm)
+//
+//   - If you use STBI_NO_PNG (or _ONLY_ without PNG), and you still
+//     want the zlib decoder to be available, #define STBI_SUPPORT_ZLIB
+//
+//  - If you define STBI_MAX_DIMENSIONS, stb_image will reject images greater
+//    than that size (in either width or height) without further processing.
+//    This is to let programs in the wild set an upper bound to prevent
+//    denial-of-service attacks on untrusted data, as one could generate a
+//    valid image of gigantic dimensions and force stb_image to allocate a
+//    huge block of memory and spend disproportionate time decoding it. By
+//    default this is set to (1 << 24), which is 16777216, but that's still
+//    very big.
+
+#ifndef STBI_NO_STDIO
+#include <stdio.h>
+#endif // STBI_NO_STDIO
+
+#define STBI_VERSION 1
+
+enum
+{
+   STBI_default = 0, // only used for desired_channels
+
+   STBI_grey       = 1,
+   STBI_grey_alpha = 2,
+   STBI_rgb        = 3,
+   STBI_rgb_alpha  = 4
+};
+
+#include <stdlib.h>
+typedef unsigned char stbi_uc;
+typedef unsigned short stbi_us;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef STBIDEF
+#ifdef STB_IMAGE_STATIC
+#define STBIDEF static
+#else
+#define STBIDEF extern
+#endif
+#endif
+
+//////////////////////////////////////////////////////////////////////////////
+//
+// PRIMARY API - works on images of any type
+//
+
+//
+// load image by filename, open file, or memory buffer
+//
+
+typedef struct
+{
+   int      (*read)  (void *user,char *data,int size);   // fill 'data' with 'size' bytes.  return number of bytes actually read
+   void     (*skip)  (void *user,int n);                 // skip the next 'n' bytes, or 'unget' the last -n bytes if negative
+   int      (*eof)   (void *user);                       // returns nonzero if we are at end of file/data
+} stbi_io_callbacks;
+
+////////////////////////////////////
+//
+// 8-bits-per-channel interface
+//
+
+STBIDEF stbi_uc *stbi_load_from_memory   (stbi_uc           const *buffer, int len   , int *x, int *y, int *channels_in_file, int desired_channels);
+STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk  , void *user, int *x, int *y, int *channels_in_file, int desired_channels);
+
+#ifndef STBI_NO_STDIO
+STBIDEF stbi_uc *stbi_load            (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels);
+STBIDEF stbi_uc *stbi_load_from_file  (FILE *f, int *x, int *y, int *channels_in_file, int desired_channels);
+// for stbi_load_from_file, file pointer is left pointing immediately after image
+#endif
+
+#ifndef STBI_NO_GIF
+STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp);
+#endif
+
+#ifdef STBI_WINDOWS_UTF8
+STBIDEF int stbi_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input);
+#endif
+
+////////////////////////////////////
+//
+// 16-bits-per-channel interface
+//
+
+STBIDEF stbi_us *stbi_load_16_from_memory   (stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels);
+STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels);
+
+#ifndef STBI_NO_STDIO
+STBIDEF stbi_us *stbi_load_16          (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels);
+STBIDEF stbi_us *stbi_load_from_file_16(FILE *f, int *x, int *y, int *channels_in_file, int desired_channels);
+#endif
+
+////////////////////////////////////
+//
+// float-per-channel interface
+//
+#ifndef STBI_NO_LINEAR
+   STBIDEF float *stbi_loadf_from_memory     (stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels);
+   STBIDEF float *stbi_loadf_from_callbacks  (stbi_io_callbacks const *clbk, void *user, int *x, int *y,  int *channels_in_file, int desired_channels);
+
+   #ifndef STBI_NO_STDIO
+   STBIDEF float *stbi_loadf            (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels);
+   STBIDEF float *stbi_loadf_from_file  (FILE *f, int *x, int *y, int *channels_in_file, int desired_channels);
+   #endif
+#endif
+
+#ifndef STBI_NO_HDR
+   STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma);
+   STBIDEF void   stbi_hdr_to_ldr_scale(float scale);
+#endif // STBI_NO_HDR
+
+#ifndef STBI_NO_LINEAR
+   STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma);
+   STBIDEF void   stbi_ldr_to_hdr_scale(float scale);
+#endif // STBI_NO_LINEAR
+
+// stbi_is_hdr is always defined, but always returns false if STBI_NO_HDR
+STBIDEF int    stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user);
+STBIDEF int    stbi_is_hdr_from_memory(stbi_uc const *buffer, int len);
+#ifndef STBI_NO_STDIO
+STBIDEF int      stbi_is_hdr          (char const *filename);
+STBIDEF int      stbi_is_hdr_from_file(FILE *f);
+#endif // STBI_NO_STDIO
+
+
+// get a VERY brief reason for failure
+// on most compilers (and ALL modern mainstream compilers) this is threadsafe
+STBIDEF const char *stbi_failure_reason  (void);
+
+// free the loaded image -- this is just free()
+STBIDEF void     stbi_image_free      (void *retval_from_stbi_load);
+
+// get image dimensions & components without fully decoding
+STBIDEF int      stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp);
+STBIDEF int      stbi_info_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp);
+STBIDEF int      stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len);
+STBIDEF int      stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *clbk, void *user);
+
+#ifndef STBI_NO_STDIO
+STBIDEF int      stbi_info               (char const *filename,     int *x, int *y, int *comp);
+STBIDEF int      stbi_info_from_file     (FILE *f,                  int *x, int *y, int *comp);
+STBIDEF int      stbi_is_16_bit          (char const *filename);
+STBIDEF int      stbi_is_16_bit_from_file(FILE *f);
+#endif
+
+
+
+// for image formats that explicitly notate that they have premultiplied alpha,
+// we just return the colors as stored in the file. set this flag to force
+// unpremultiplication. results are undefined if the unpremultiply overflow.
+STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply);
+
+// indicate whether we should process iphone images back to canonical format,
+// or just pass them through "as-is"
+STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert);
+
+// flip the image vertically, so the first pixel in the output array is the bottom left
+STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip);
+
+// as above, but only applies to images loaded on the thread that calls the function
+// this function is only available if your compiler supports thread-local variables;
+// calling it will fail to link if your compiler doesn't
+STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip);
+
+// ZLIB client - used by PNG, available for other purposes
+
+STBIDEF char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen);
+STBIDEF char *stbi_zlib_decode_malloc_guesssize_headerflag(const char *buffer, int len, int initial_size, int *outlen, int parse_header);
+STBIDEF char *stbi_zlib_decode_malloc(const char *buffer, int len, int *outlen);
+STBIDEF int   stbi_zlib_decode_buffer(char *obuffer, int olen, const char *ibuffer, int ilen);
+
+STBIDEF char *stbi_zlib_decode_noheader_malloc(const char *buffer, int len, int *outlen);
+STBIDEF int   stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+//
+//
+////   end header file   /////////////////////////////////////////////////////
+#endif // STBI_INCLUDE_STB_IMAGE_H
+
+#ifdef STB_IMAGE_IMPLEMENTATION
+
+#if defined(STBI_ONLY_JPEG) || defined(STBI_ONLY_PNG) || defined(STBI_ONLY_BMP) \
+  || defined(STBI_ONLY_TGA) || defined(STBI_ONLY_GIF) || defined(STBI_ONLY_PSD) \
+  || defined(STBI_ONLY_HDR) || defined(STBI_ONLY_PIC) || defined(STBI_ONLY_PNM) \
+  || defined(STBI_ONLY_ZLIB)
+   #ifndef STBI_ONLY_JPEG
+   #define STBI_NO_JPEG
+   #endif
+   #ifndef STBI_ONLY_PNG
+   #define STBI_NO_PNG
+   #endif
+   #ifndef STBI_ONLY_BMP
+   #define STBI_NO_BMP
+   #endif
+   #ifndef STBI_ONLY_PSD
+   #define STBI_NO_PSD
+   #endif
+   #ifndef STBI_ONLY_TGA
+   #define STBI_NO_TGA
+   #endif
+   #ifndef STBI_ONLY_GIF
+   #define STBI_NO_GIF
+   #endif
+   #ifndef STBI_ONLY_HDR
+   #define STBI_NO_HDR
+   #endif
+   #ifndef STBI_ONLY_PIC
+   #define STBI_NO_PIC
+   #endif
+   #ifndef STBI_ONLY_PNM
+   #define STBI_NO_PNM
+   #endif
+#endif
+
+#if defined(STBI_NO_PNG) && !defined(STBI_SUPPORT_ZLIB) && !defined(STBI_NO_ZLIB)
+#define STBI_NO_ZLIB
+#endif
+
+
+#include <stdarg.h>
+#include <stddef.h> // ptrdiff_t on osx
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+
+#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR)
+#include <math.h>  // ldexp, pow
+#endif
+
+#ifndef STBI_NO_STDIO
+#include <stdio.h>
+#endif
+
+#ifndef STBI_ASSERT
+#include <assert.h>
+#define STBI_ASSERT(x) assert(x)
+#endif
+
+#ifdef __cplusplus
+#define STBI_EXTERN extern "C"
+#else
+#define STBI_EXTERN extern
+#endif
+
+
+#ifndef _MSC_VER
+   #ifdef __cplusplus
+   #define stbi_inline inline
+   #else
+   #define stbi_inline
+   #endif
+#else
+   #define stbi_inline __forceinline
+#endif
+
+#ifndef STBI_NO_THREAD_LOCALS
+   #if defined(__cplusplus) &&  __cplusplus >= 201103L
+      #define STBI_THREAD_LOCAL       thread_local
+   #elif defined(__GNUC__) && __GNUC__ < 5
+      #define STBI_THREAD_LOCAL       __thread
+   #elif defined(_MSC_VER)
+      #define STBI_THREAD_LOCAL       __declspec(thread)
+   #elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 201112L && !defined(__STDC_NO_THREADS__)
+      #define STBI_THREAD_LOCAL       _Thread_local
+   #endif
+
+   #ifndef STBI_THREAD_LOCAL
+      #if defined(__GNUC__)
+        #define STBI_THREAD_LOCAL       __thread
+      #endif
+   #endif
+#endif
+
+#ifdef _MSC_VER
+typedef unsigned short stbi__uint16;
+typedef   signed short stbi__int16;
+typedef unsigned int   stbi__uint32;
+typedef   signed int   stbi__int32;
+#else
+#include <stdint.h>
+typedef uint16_t stbi__uint16;
+typedef int16_t  stbi__int16;
+typedef uint32_t stbi__uint32;
+typedef int32_t  stbi__int32;
+#endif
+
+// should produce compiler error if size is wrong
+typedef unsigned char validate_uint32[sizeof(stbi__uint32)==4 ? 1 : -1];
+
+#ifdef _MSC_VER
+#define STBI_NOTUSED(v)  (void)(v)
+#else
+#define STBI_NOTUSED(v)  (void)sizeof(v)
+#endif
+
+#ifdef _MSC_VER
+#define STBI_HAS_LROTL
+#endif
+
+#ifdef STBI_HAS_LROTL
+   #define stbi_lrot(x,y)  _lrotl(x,y)
+#else
+   #define stbi_lrot(x,y)  (((x) << (y)) | ((x) >> (32 - (y))))
+#endif
+
+#if defined(STBI_MALLOC) && defined(STBI_FREE) && (defined(STBI_REALLOC) || defined(STBI_REALLOC_SIZED))
+// ok
+#elif !defined(STBI_MALLOC) && !defined(STBI_FREE) && !defined(STBI_REALLOC) && !defined(STBI_REALLOC_SIZED)
+// ok
+#else
+#error "Must define all or none of STBI_MALLOC, STBI_FREE, and STBI_REALLOC (or STBI_REALLOC_SIZED)."
+#endif
+
+#ifndef STBI_MALLOC
+#define STBI_MALLOC(sz)           malloc(sz)
+#define STBI_REALLOC(p,newsz)     realloc(p,newsz)
+#define STBI_FREE(p)              free(p)
+#endif
+
+#ifndef STBI_REALLOC_SIZED
+#define STBI_REALLOC_SIZED(p,oldsz,newsz) ((void)oldsz, STBI_REALLOC(p,newsz))
+#endif
+
+// x86/x64 detection
+#if defined(__x86_64__) || defined(_M_X64)
+#define STBI__X64_TARGET
+#elif defined(__i386) || defined(_M_IX86)
+#define STBI__X86_TARGET
+#endif
+
+#if defined(__GNUC__) && defined(STBI__X86_TARGET) && !defined(__SSE2__) && !defined(STBI_NO_SIMD)
+// gcc doesn't support sse2 intrinsics unless you compile with -msse2,
+// which in turn means it gets to use SSE2 everywhere. This is unfortunate,
+// but previous attempts to provide the SSE2 functions with runtime
+// detection caused numerous issues. The way architecture extensions are
+// exposed in GCC/Clang is, sadly, not really suited for one-file libs.
+// New behavior: if compiled with -msse2, we use SSE2 without any
+// detection; if not, we don't use it at all.
+#define STBI_NO_SIMD
+#endif
+
+#if defined(__MINGW32__) && defined(STBI__X86_TARGET) && !defined(STBI_MINGW_ENABLE_SSE2) && !defined(STBI_NO_SIMD)
+// Note that __MINGW32__ doesn't actually mean 32-bit, so we have to avoid STBI__X64_TARGET
+//
+// 32-bit MinGW wants ESP to be 16-byte aligned, but this is not in the
+// Windows ABI and VC++ as well as Windows DLLs don't maintain that invariant.
+// As a result, enabling SSE2 on 32-bit MinGW is dangerous when not
+// simultaneously enabling "-mstackrealign".
+//
+// See https://github.com/nothings/stb/issues/81 for more information.
+//
+// So default to no SSE2 on 32-bit MinGW. If you've read this far and added
+// -mstackrealign to your build settings, feel free to #define STBI_MINGW_ENABLE_SSE2.
+#define STBI_NO_SIMD
+#endif
+
+#if !defined(STBI_NO_SIMD) && (defined(STBI__X86_TARGET) || defined(STBI__X64_TARGET))
+#define STBI_SSE2
+#include <emmintrin.h>
+
+#ifdef _MSC_VER
+
+#if _MSC_VER >= 1400  // not VC6
+#include <intrin.h> // __cpuid
+static int stbi__cpuid3(void)
+{
+   int info[4];
+   __cpuid(info,1);
+   return info[3];
+}
+#else
+static int stbi__cpuid3(void)
+{
+   int res;
+   __asm {
+      mov  eax,1
+      cpuid
+      mov  res,edx
+   }
+   return res;
+}
+#endif
+
+#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name
+
+#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2)
+static int stbi__sse2_available(void)
+{
+   int info3 = stbi__cpuid3();
+   return ((info3 >> 26) & 1) != 0;
+}
+#endif
+
+#else // assume GCC-style if not VC++
+#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16)))
+
+#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2)
+static int stbi__sse2_available(void)
+{
+   // If we're even attempting to compile this on GCC/Clang, that means
+   // -msse2 is on, which means the compiler is allowed to use SSE2
+   // instructions at will, and so are we.
+   return 1;
+}
+#endif
+
+#endif
+#endif
+
+// ARM NEON
+#if defined(STBI_NO_SIMD) && defined(STBI_NEON)
+#undef STBI_NEON
+#endif
+
+#ifdef STBI_NEON
+#include <arm_neon.h>
+// assume GCC or Clang on ARM targets
+#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16)))
+#endif
+
+#ifndef STBI_SIMD_ALIGN
+#define STBI_SIMD_ALIGN(type, name) type name
+#endif
+
+#ifndef STBI_MAX_DIMENSIONS
+#define STBI_MAX_DIMENSIONS (1 << 24)
+#endif
+
+///////////////////////////////////////////////
+//
+//  stbi__context struct and start_xxx functions
+
+// stbi__context structure is our basic context used by all images, so it
+// contains all the IO context, plus some basic image information
+typedef struct
+{
+   stbi__uint32 img_x, img_y;
+   int img_n, img_out_n;
+
+   stbi_io_callbacks io;
+   void *io_user_data;
+
+   int read_from_callbacks;
+   int buflen;
+   stbi_uc buffer_start[128];
+   int callback_already_read;
+
+   stbi_uc *img_buffer, *img_buffer_end;
+   stbi_uc *img_buffer_original, *img_buffer_original_end;
+} stbi__context;
+
+
+static void stbi__refill_buffer(stbi__context *s);
+
+// initialize a memory-decode context
+static void stbi__start_mem(stbi__context *s, stbi_uc const *buffer, int len)
+{
+   s->io.read = NULL;
+   s->read_from_callbacks = 0;
+   s->callback_already_read = 0;
+   s->img_buffer = s->img_buffer_original = (stbi_uc *) buffer;
+   s->img_buffer_end = s->img_buffer_original_end = (stbi_uc *) buffer+len;
+}
+
+// initialize a callback-based context
+static void stbi__start_callbacks(stbi__context *s, stbi_io_callbacks *c, void *user)
+{
+   s->io = *c;
+   s->io_user_data = user;
+   s->buflen = sizeof(s->buffer_start);
+   s->read_from_callbacks = 1;
+   s->callback_already_read = 0;
+   s->img_buffer = s->img_buffer_original = s->buffer_start;
+   stbi__refill_buffer(s);
+   s->img_buffer_original_end = s->img_buffer_end;
+}
+
+#ifndef STBI_NO_STDIO
+
+static int stbi__stdio_read(void *user, char *data, int size)
+{
+   return (int) fread(data,1,size,(FILE*) user);
+}
+
+static void stbi__stdio_skip(void *user, int n)
+{
+   int ch;
+   fseek((FILE*) user, n, SEEK_CUR);
+   ch = fgetc((FILE*) user);  /* have to read a byte to reset feof()'s flag */
+   if (ch != EOF) {
+      ungetc(ch, (FILE *) user);  /* push byte back onto stream if valid. */
+   }
+}
+
+static int stbi__stdio_eof(void *user)
+{
+   return feof((FILE*) user) || ferror((FILE *) user);
+}
+
+static stbi_io_callbacks stbi__stdio_callbacks =
+{
+   stbi__stdio_read,
+   stbi__stdio_skip,
+   stbi__stdio_eof,
+};
+
+static void stbi__start_file(stbi__context *s, FILE *f)
+{
+   stbi__start_callbacks(s, &stbi__stdio_callbacks, (void *) f);
+}
+
+//static void stop_file(stbi__context *s) { }
+
+#endif // !STBI_NO_STDIO
+
+static void stbi__rewind(stbi__context *s)
+{
+   // conceptually rewind SHOULD rewind to the beginning of the stream,
+   // but we just rewind to the beginning of the initial buffer, because
+   // we only use it after doing 'test', which only ever looks at at most 92 bytes
+   s->img_buffer = s->img_buffer_original;
+   s->img_buffer_end = s->img_buffer_original_end;
+}
+
+enum
+{
+   STBI_ORDER_RGB,
+   STBI_ORDER_BGR
+};
+
+typedef struct
+{
+   int bits_per_channel;
+   int num_channels;
+   int channel_order;
+} stbi__result_info;
+
+#ifndef STBI_NO_JPEG
+static int      stbi__jpeg_test(stbi__context *s);
+static void    *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
+static int      stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp);
+#endif
+
+#ifndef STBI_NO_PNG
+static int      stbi__png_test(stbi__context *s);
+static void    *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
+static int      stbi__png_info(stbi__context *s, int *x, int *y, int *comp);
+static int      stbi__png_is16(stbi__context *s);
+#endif
+
+#ifndef STBI_NO_BMP
+static int      stbi__bmp_test(stbi__context *s);
+static void    *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
+static int      stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp);
+#endif
+
+#ifndef STBI_NO_TGA
+static int      stbi__tga_test(stbi__context *s);
+static void    *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
+static int      stbi__tga_info(stbi__context *s, int *x, int *y, int *comp);
+#endif
+
+#ifndef STBI_NO_PSD
+static int      stbi__psd_test(stbi__context *s);
+static void    *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc);
+static int      stbi__psd_info(stbi__context *s, int *x, int *y, int *comp);
+static int      stbi__psd_is16(stbi__context *s);
+#endif
+
+#ifndef STBI_NO_HDR
+static int      stbi__hdr_test(stbi__context *s);
+static float   *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
+static int      stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp);
+#endif
+
+#ifndef STBI_NO_PIC
+static int      stbi__pic_test(stbi__context *s);
+static void    *stbi__pic_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
+static int      stbi__pic_info(stbi__context *s, int *x, int *y, int *comp);
+#endif
+
+#ifndef STBI_NO_GIF
+static int      stbi__gif_test(stbi__context *s);
+static void    *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
+static void    *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y, int *z, int *comp, int req_comp);
+static int      stbi__gif_info(stbi__context *s, int *x, int *y, int *comp);
+#endif
+
+#ifndef STBI_NO_PNM
+static int      stbi__pnm_test(stbi__context *s);
+static void    *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
+static int      stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp);
+#endif
+
+static
+#ifdef STBI_THREAD_LOCAL
+STBI_THREAD_LOCAL
+#endif
+const char *stbi__g_failure_reason;
+
+STBIDEF const char *stbi_failure_reason(void)
+{
+   return stbi__g_failure_reason;
+}
+
+#ifndef STBI_NO_FAILURE_STRINGS
+static int stbi__err(const char *str)
+{
+   stbi__g_failure_reason = str;
+   return 0;
+}
+#endif
+
+static void *stbi__malloc(size_t size)
+{
+    return STBI_MALLOC(size);
+}
+
+// stb_image uses ints pervasively, including for offset calculations.
+// therefore the largest decoded image size we can support with the
+// current code, even on 64-bit targets, is INT_MAX. this is not a
+// significant limitation for the intended use case.
+//
+// we do, however, need to make sure our size calculations don't
+// overflow. hence a few helper functions for size calculations that
+// multiply integers together, making sure that they're non-negative
+// and no overflow occurs.
+
+// return 1 if the sum is valid, 0 on overflow.
+// negative terms are considered invalid.
+static int stbi__addsizes_valid(int a, int b)
+{
+   if (b < 0) return 0;
+   // now 0 <= b <= INT_MAX, hence also
+   // 0 <= INT_MAX - b <= INTMAX.
+   // And "a + b <= INT_MAX" (which might overflow) is the
+   // same as a <= INT_MAX - b (no overflow)
+   return a <= INT_MAX - b;
+}
+
+// returns 1 if the product is valid, 0 on overflow.
+// negative factors are considered invalid.
+static int stbi__mul2sizes_valid(int a, int b)
+{
+   if (a < 0 || b < 0) return 0;
+   if (b == 0) return 1; // mul-by-0 is always safe
+   // portable way to check for no overflows in a*b
+   return a <= INT_MAX/b;
+}
+
+#if !defined(STBI_NO_JPEG) || !defined(STBI_NO_PNG) || !defined(STBI_NO_TGA) || !defined(STBI_NO_HDR)
+// returns 1 if "a*b + add" has no negative terms/factors and doesn't overflow
+static int stbi__mad2sizes_valid(int a, int b, int add)
+{
+   return stbi__mul2sizes_valid(a, b) && stbi__addsizes_valid(a*b, add);
+}
+#endif
+
+// returns 1 if "a*b*c + add" has no negative terms/factors and doesn't overflow
+static int stbi__mad3sizes_valid(int a, int b, int c, int add)
+{
+   return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) &&
+      stbi__addsizes_valid(a*b*c, add);
+}
+
+// returns 1 if "a*b*c*d + add" has no negative terms/factors and doesn't overflow
+#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR)
+static int stbi__mad4sizes_valid(int a, int b, int c, int d, int add)
+{
+   return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) &&
+      stbi__mul2sizes_valid(a*b*c, d) && stbi__addsizes_valid(a*b*c*d, add);
+}
+#endif
+
+#if !defined(STBI_NO_JPEG) || !defined(STBI_NO_PNG) || !defined(STBI_NO_TGA) || !defined(STBI_NO_HDR)
+// mallocs with size overflow checking
+static void *stbi__malloc_mad2(int a, int b, int add)
+{
+   if (!stbi__mad2sizes_valid(a, b, add)) return NULL;
+   return stbi__malloc(a*b + add);
+}
+#endif
+
+static void *stbi__malloc_mad3(int a, int b, int c, int add)
+{
+   if (!stbi__mad3sizes_valid(a, b, c, add)) return NULL;
+   return stbi__malloc(a*b*c + add);
+}
+
+#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR)
+static void *stbi__malloc_mad4(int a, int b, int c, int d, int add)
+{
+   if (!stbi__mad4sizes_valid(a, b, c, d, add)) return NULL;
+   return stbi__malloc(a*b*c*d + add);
+}
+#endif
+
+// stbi__err - error
+// stbi__errpf - error returning pointer to float
+// stbi__errpuc - error returning pointer to unsigned char
+
+#ifdef STBI_NO_FAILURE_STRINGS
+   #define stbi__err(x,y)  0
+#elif defined(STBI_FAILURE_USERMSG)
+   #define stbi__err(x,y)  stbi__err(y)
+#else
+   #define stbi__err(x,y)  stbi__err(x)
+#endif
+
+#define stbi__errpf(x,y)   ((float *)(size_t) (stbi__err(x,y)?NULL:NULL))
+#define stbi__errpuc(x,y)  ((unsigned char *)(size_t) (stbi__err(x,y)?NULL:NULL))
+
+STBIDEF void stbi_image_free(void *retval_from_stbi_load)
+{
+   STBI_FREE(retval_from_stbi_load);
+}
+
+#ifndef STBI_NO_LINEAR
+static float   *stbi__ldr_to_hdr(stbi_uc *data, int x, int y, int comp);
+#endif
+
+#ifndef STBI_NO_HDR
+static stbi_uc *stbi__hdr_to_ldr(float   *data, int x, int y, int comp);
+#endif
+
+static int stbi__vertically_flip_on_load_global = 0;
+
+STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
+{
+   stbi__vertically_flip_on_load_global = flag_true_if_should_flip;
+}
+
+#ifndef STBI_THREAD_LOCAL
+#define stbi__vertically_flip_on_load  stbi__vertically_flip_on_load_global
+#else
+static STBI_THREAD_LOCAL int stbi__vertically_flip_on_load_local, stbi__vertically_flip_on_load_set;
+
+STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip)
+{
+   stbi__vertically_flip_on_load_local = flag_true_if_should_flip;
+   stbi__vertically_flip_on_load_set = 1;
+}
+
+#define stbi__vertically_flip_on_load  (stbi__vertically_flip_on_load_set       \
+                                         ? stbi__vertically_flip_on_load_local  \
+                                         : stbi__vertically_flip_on_load_global)
+#endif // STBI_THREAD_LOCAL
+
+static void *stbi__load_main(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc)
+{
+   memset(ri, 0, sizeof(*ri)); // make sure it's initialized if we add new fields
+   ri->bits_per_channel = 8; // default is 8 so most paths don't have to be changed
+   ri->channel_order = STBI_ORDER_RGB; // all current input & output are this, but this is here so we can add BGR order
+   ri->num_channels = 0;
+
+   #ifndef STBI_NO_JPEG
+   if (stbi__jpeg_test(s)) return stbi__jpeg_load(s,x,y,comp,req_comp, ri);
+   #endif
+   #ifndef STBI_NO_PNG
+   if (stbi__png_test(s))  return stbi__png_load(s,x,y,comp,req_comp, ri);
+   #endif
+   #ifndef STBI_NO_BMP
+   if (stbi__bmp_test(s))  return stbi__bmp_load(s,x,y,comp,req_comp, ri);
+   #endif
+   #ifndef STBI_NO_GIF
+   if (stbi__gif_test(s))  return stbi__gif_load(s,x,y,comp,req_comp, ri);
+   #endif
+   #ifndef STBI_NO_PSD
+   if (stbi__psd_test(s))  return stbi__psd_load(s,x,y,comp,req_comp, ri, bpc);
+   #else
+   STBI_NOTUSED(bpc);
+   #endif
+   #ifndef STBI_NO_PIC
+   if (stbi__pic_test(s))  return stbi__pic_load(s,x,y,comp,req_comp, ri);
+   #endif
+   #ifndef STBI_NO_PNM
+   if (stbi__pnm_test(s))  return stbi__pnm_load(s,x,y,comp,req_comp, ri);
+   #endif
+
+   #ifndef STBI_NO_HDR
+   if (stbi__hdr_test(s)) {
+      float *hdr = stbi__hdr_load(s, x,y,comp,req_comp, ri);
+      return stbi__hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp);
+   }
+   #endif
+
+   #ifndef STBI_NO_TGA
+   // test tga last because it's a crappy test!
+   if (stbi__tga_test(s))
+      return stbi__tga_load(s,x,y,comp,req_comp, ri);
+   #endif
+
+   return stbi__errpuc("unknown image type", "Image not of any known type, or corrupt");
+}
+
+static stbi_uc *stbi__convert_16_to_8(stbi__uint16 *orig, int w, int h, int channels)
+{
+   int i;
+   int img_len = w * h * channels;
+   stbi_uc *reduced;
+
+   reduced = (stbi_uc *) stbi__malloc(img_len);
+   if (reduced == NULL) return stbi__errpuc("outofmem", "Out of memory");
+
+   for (i = 0; i < img_len; ++i)
+      reduced[i] = (stbi_uc)((orig[i] >> 8) & 0xFF); // top half of each byte is sufficient approx of 16->8 bit scaling
+
+   STBI_FREE(orig);
+   return reduced;
+}
+
+static stbi__uint16 *stbi__convert_8_to_16(stbi_uc *orig, int w, int h, int channels)
+{
+   int i;
+   int img_len = w * h * channels;
+   stbi__uint16 *enlarged;
+
+   enlarged = (stbi__uint16 *) stbi__malloc(img_len*2);
+   if (enlarged == NULL) return (stbi__uint16 *) stbi__errpuc("outofmem", "Out of memory");
+
+   for (i = 0; i < img_len; ++i)
+      enlarged[i] = (stbi__uint16)((orig[i] << 8) + orig[i]); // replicate to high and low byte, maps 0->0, 255->0xffff
+
+   STBI_FREE(orig);
+   return enlarged;
+}
+
+static void stbi__vertical_flip(void *image, int w, int h, int bytes_per_pixel)
+{
+   int row;
+   size_t bytes_per_row = (size_t)w * bytes_per_pixel;
+   stbi_uc temp[2048];
+   stbi_uc *bytes = (stbi_uc *)image;
+
+   for (row = 0; row < (h>>1); row++) {
+      stbi_uc *row0 = bytes + row*bytes_per_row;
+      stbi_uc *row1 = bytes + (h - row - 1)*bytes_per_row;
+      // swap row0 with row1
+      size_t bytes_left = bytes_per_row;
+      while (bytes_left) {
+         size_t bytes_copy = (bytes_left < sizeof(temp)) ? bytes_left : sizeof(temp);
+         memcpy(temp, row0, bytes_copy);
+         memcpy(row0, row1, bytes_copy);
+         memcpy(row1, temp, bytes_copy);
+         row0 += bytes_copy;
+         row1 += bytes_copy;
+         bytes_left -= bytes_copy;
+      }
+   }
+}
+
+#ifndef STBI_NO_GIF
+static void stbi__vertical_flip_slices(void *image, int w, int h, int z, int bytes_per_pixel)
+{
+   int slice;
+   int slice_size = w * h * bytes_per_pixel;
+
+   stbi_uc *bytes = (stbi_uc *)image;
+   for (slice = 0; slice < z; ++slice) {
+      stbi__vertical_flip(bytes, w, h, bytes_per_pixel);
+      bytes += slice_size;
+   }
+}
+#endif
+
+static unsigned char *stbi__load_and_postprocess_8bit(stbi__context *s, int *x, int *y, int *comp, int req_comp)
+{
+   stbi__result_info ri;
+   void *result = stbi__load_main(s, x, y, comp, req_comp, &ri, 8);
+
+   if (result == NULL)
+      return NULL;
+
+   // it is the responsibility of the loaders to make sure we get either 8 or 16 bit.
+   STBI_ASSERT(ri.bits_per_channel == 8 || ri.bits_per_channel == 16);
+
+   if (ri.bits_per_channel != 8) {
+      result = stbi__convert_16_to_8((stbi__uint16 *) result, *x, *y, req_comp == 0 ? *comp : req_comp);
+      ri.bits_per_channel = 8;
+   }
+
+   // @TODO: move stbi__convert_format to here
+
+   if (stbi__vertically_flip_on_load) {
+      int channels = req_comp ? req_comp : *comp;
+      stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi_uc));
+   }
+
+   return (unsigned char *) result;
+}
+
+static stbi__uint16 *stbi__load_and_postprocess_16bit(stbi__context *s, int *x, int *y, int *comp, int req_comp)
+{
+   stbi__result_info ri;
+   void *result = stbi__load_main(s, x, y, comp, req_comp, &ri, 16);
+
+   if (result == NULL)
+      return NULL;
+
+   // it is the responsibility of the loaders to make sure we get either 8 or 16 bit.
+   STBI_ASSERT(ri.bits_per_channel == 8 || ri.bits_per_channel == 16);
+
+   if (ri.bits_per_channel != 16) {
+      result = stbi__convert_8_to_16((stbi_uc *) result, *x, *y, req_comp == 0 ? *comp : req_comp);
+      ri.bits_per_channel = 16;
+   }
+
+   // @TODO: move stbi__convert_format16 to here
+   // @TODO: special case RGB-to-Y (and RGBA-to-YA) for 8-bit-to-16-bit case to keep more precision
+
+   if (stbi__vertically_flip_on_load) {
+      int channels = req_comp ? req_comp : *comp;
+      stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi__uint16));
+   }
+
+   return (stbi__uint16 *) result;
+}
+
+#if !defined(STBI_NO_HDR) && !defined(STBI_NO_LINEAR)
+static void stbi__float_postprocess(float *result, int *x, int *y, int *comp, int req_comp)
+{
+   if (stbi__vertically_flip_on_load && result != NULL) {
+      int channels = req_comp ? req_comp : *comp;
+      stbi__vertical_flip(result, *x, *y, channels * sizeof(float));
+   }
+}
+#endif
+
+#ifndef STBI_NO_STDIO
+
+#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8)
+STBI_EXTERN __declspec(dllimport) int __stdcall MultiByteToWideChar(unsigned int cp, unsigned long flags, const char *str, int cbmb, wchar_t *widestr, int cchwide);
+STBI_EXTERN __declspec(dllimport) int __stdcall WideCharToMultiByte(unsigned int cp, unsigned long flags, const wchar_t *widestr, int cchwide, char *str, int cbmb, const char *defchar, int *used_default);
+#endif
+
+#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8)
+STBIDEF int stbi_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input)
+{
+        return WideCharToMultiByte(65001 /* UTF8 */, 0, input, -1, buffer, (int) bufferlen, NULL, NULL);
+}
+#endif
+
+static FILE *stbi__fopen(char const *filename, char const *mode)
+{
+   FILE *f;
+#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8)
+   wchar_t wMode[64];
+   wchar_t wFilename[1024];
+        if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename)))
+      return 0;
+
+        if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode)))
+      return 0;
+
+#if _MSC_VER >= 1400
+        if (0 != _wfopen_s(&f, wFilename, wMode))
+                f = 0;
+#else
+   f = _wfopen(wFilename, wMode);
+#endif
+
+#elif defined(_MSC_VER) && _MSC_VER >= 1400
+   if (0 != fopen_s(&f, filename, mode))
+      f=0;
+#else
+   f = fopen(filename, mode);
+#endif
+   return f;
+}
+
+
+STBIDEF stbi_uc *stbi_load(char const *filename, int *x, int *y, int *comp, int req_comp)
+{
+   FILE *f = stbi__fopen(filename, "rb");
+   unsigned char *result;
+   if (!f) return stbi__errpuc("can't fopen", "Unable to open file");
+   result = stbi_load_from_file(f,x,y,comp,req_comp);
+   fclose(f);
+   return result;
+}
+
+STBIDEF stbi_uc *stbi_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp)
+{
+   unsigned char *result;
+   stbi__context s;
+   stbi__start_file(&s,f);
+   result = stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp);
+   if (result) {
+      // need to 'unget' all the characters in the IO buffer
+      fseek(f, - (int) (s.img_buffer_end - s.img_buffer), SEEK_CUR);
+   }
+   return result;
+}
+
+STBIDEF stbi__uint16 *stbi_load_from_file_16(FILE *f, int *x, int *y, int *comp, int req_comp)
+{
+   stbi__uint16 *result;
+   stbi__context s;
+   stbi__start_file(&s,f);
+   result = stbi__load_and_postprocess_16bit(&s,x,y,comp,req_comp);
+   if (result) {
+      // need to 'unget' all the characters in the IO buffer
+      fseek(f, - (int) (s.img_buffer_end - s.img_buffer), SEEK_CUR);
+   }
+   return result;
+}
+
+STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
+{
+   FILE *f = stbi__fopen(filename, "rb");
+   stbi__uint16 *result;
+   if (!f) return (stbi_us *) stbi__errpuc("can't fopen", "Unable to open file");
+   result = stbi_load_from_file_16(f,x,y,comp,req_comp);
+   fclose(f);
+   return result;
+}
+
+
+#endif //!STBI_NO_STDIO
+
+STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
+{
+   stbi__context s;
+   stbi__start_mem(&s,buffer,len);
+   return stbi__load_and_postprocess_16bit(&s,x,y,channels_in_file,desired_channels);
+}
+
+STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
+{
+   stbi__context s;
+   stbi__start_callbacks(&s, (stbi_io_callbacks *)clbk, user);
+   return stbi__load_and_postprocess_16bit(&s,x,y,channels_in_file,desired_channels);
+}
+
+STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
+{
+   stbi__context s;
+   stbi__start_mem(&s,buffer,len);
+   return stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp);
+}
+
+STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
+{
+   stbi__context s;
+   stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user);
+   return stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp);
+}
+
+#ifndef STBI_NO_GIF
+STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
+{
+   unsigned char *result;
+   stbi__context s;
+   stbi__start_mem(&s,buffer,len);
+
+   result = (unsigned char*) stbi__load_gif_main(&s, delays, x, y, z, comp, req_comp);
+   if (stbi__vertically_flip_on_load) {
+      stbi__vertical_flip_slices( result, *x, *y, *z, *comp );
+   }
+
+   return result;
+}
+#endif
+
+#ifndef STBI_NO_LINEAR
+static float *stbi__loadf_main(stbi__context *s, int *x, int *y, int *comp, int req_comp)
+{
+   unsigned char *data;
+   #ifndef STBI_NO_HDR
+   if (stbi__hdr_test(s)) {
+      stbi__result_info ri;
+      float *hdr_data = stbi__hdr_load(s,x,y,comp,req_comp, &ri);
+      if (hdr_data)
+         stbi__float_postprocess(hdr_data,x,y,comp,req_comp);
+      return hdr_data;
+   }
+   #endif
+   data = stbi__load_and_postprocess_8bit(s, x, y, comp, req_comp);
+   if (data)
+      return stbi__ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp);
+   return stbi__errpf("unknown image type", "Image not of any known type, or corrupt");
+}
+
+STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
+{
+   stbi__context s;
+   stbi__start_mem(&s,buffer,len);
+   return stbi__loadf_main(&s,x,y,comp,req_comp);
+}
+
+STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
+{
+   stbi__context s;
+   stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user);
+   return stbi__loadf_main(&s,x,y,comp,req_comp);
+}
+
+#ifndef STBI_NO_STDIO
+STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
+{
+   float *result;
+   FILE *f = stbi__fopen(filename, "rb");
+   if (!f) return stbi__errpf("can't fopen", "Unable to open file");
+   result = stbi_loadf_from_file(f,x,y,comp,req_comp);
+   fclose(f);
+   return result;
+}
+
+STBIDEF float *stbi_loadf_from_file(FILE *f, int *x, int *y, int *comp, int req_comp)
+{
+   stbi__context s;
+   stbi__start_file(&s,f);
+   return stbi__loadf_main(&s,x,y,comp,req_comp);
+}
+#endif // !STBI_NO_STDIO
+
+#endif // !STBI_NO_LINEAR
+
+// these is-hdr-or-not is defined independent of whether STBI_NO_LINEAR is
+// defined, for API simplicity; if STBI_NO_LINEAR is defined, it always
+// reports false!
+
+STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
+{
+   #ifndef STBI_NO_HDR
+   stbi__context s;
+   stbi__start_mem(&s,buffer,len);
+   return stbi__hdr_test(&s);
+   #else
+   STBI_NOTUSED(buffer);
+   STBI_NOTUSED(len);
+   return 0;
+   #endif
+}
+
+#ifndef STBI_NO_STDIO
+STBIDEF int      stbi_is_hdr          (char const *filename)
+{
+   FILE *f = stbi__fopen(filename, "rb");
+   int result=0;
+   if (f) {
+      result = stbi_is_hdr_from_file(f);
+      fclose(f);
+   }
+   return result;
+}
+
+STBIDEF int stbi_is_hdr_from_file(FILE *f)
+{
+   #ifndef STBI_NO_HDR
+   long pos = ftell(f);
+   int res;
+   stbi__context s;
+   stbi__start_file(&s,f);
+   res = stbi__hdr_test(&s);
+   fseek(f, pos, SEEK_SET);
+   return res;
+   #else
+   STBI_NOTUSED(f);
+   return 0;
+   #endif
+}
+#endif // !STBI_NO_STDIO
+
+STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
+{
+   #ifndef STBI_NO_HDR
+   stbi__context s;
+   stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user);
+   return stbi__hdr_test(&s);
+   #else
+   STBI_NOTUSED(clbk);
+   STBI_NOTUSED(user);
+   return 0;
+   #endif
+}
+
+#ifndef STBI_NO_LINEAR
+static float stbi__l2h_gamma=2.2f, stbi__l2h_scale=1.0f;
+
+STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
+STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
+#endif
+
+static float stbi__h2l_gamma_i=1.0f/2.2f, stbi__h2l_scale_i=1.0f;
+
+STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
+STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
+
+
+//////////////////////////////////////////////////////////////////////////////
+//
+// Common code used by all image loaders
+//
+
+enum
+{
+   STBI__SCAN_load=0,
+   STBI__SCAN_type,
+   STBI__SCAN_header
+};
+
+static void stbi__refill_buffer(stbi__context *s)
+{
+   int n = (s->io.read)(s->io_user_data,(char*)s->buffer_start,s->buflen);
+   s->callback_already_read += (int) (s->img_buffer - s->img_buffer_original);
+   if (n == 0) {
+      // at end of file, treat same as if from memory, but need to handle case
+      // where s->img_buffer isn't pointing to safe memory, e.g. 0-byte file
+      s->read_from_callbacks = 0;
+      s->img_buffer = s->buffer_start;
+      s->img_buffer_end = s->buffer_start+1;
+      *s->img_buffer = 0;
+   } else {
+      s->img_buffer = s->buffer_start;
+      s->img_buffer_end = s->buffer_start + n;
+   }
+}
+
+stbi_inline static stbi_uc stbi__get8(stbi__context *s)
+{
+   if (s->img_buffer < s->img_buffer_end)
+      return *s->img_buffer++;
+   if (s->read_from_callbacks) {
+      stbi__refill_buffer(s);
+      return *s->img_buffer++;
+   }
+   return 0;
+}
+
+#if defined(STBI_NO_JPEG) && defined(STBI_NO_HDR) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM)
+// nothing
+#else
+stbi_inline static int stbi__at_eof(stbi__context *s)
+{
+   if (s->io.read) {
+      if (!(s->io.eof)(s->io_user_data)) return 0;
+      // if feof() is true, check if buffer = end
+      // special case: we've only got the special 0 character at the end
+      if (s->read_from_callbacks == 0) return 1;
+   }
+
+   return s->img_buffer >= s->img_buffer_end;
+}
+#endif
+
+#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && defined(STBI_NO_PIC)
+// nothing
+#else
+static void stbi__skip(stbi__context *s, int n)
+{
+   if (n == 0) return;  // already there!
+   if (n < 0) {
+      s->img_buffer = s->img_buffer_end;
+      return;
+   }
+   if (s->io.read) {
+      int blen = (int) (s->img_buffer_end - s->img_buffer);
+      if (blen < n) {
+         s->img_buffer = s->img_buffer_end;
+         (s->io.skip)(s->io_user_data, n - blen);
+         return;
+      }
+   }
+   s->img_buffer += n;
+}
+#endif
+
+#if defined(STBI_NO_PNG) && defined(STBI_NO_TGA) && defined(STBI_NO_HDR) && defined(STBI_NO_PNM)
+// nothing
+#else
+static int stbi__getn(stbi__context *s, stbi_uc *buffer, int n)
+{
+   if (s->io.read) {
+      int blen = (int) (s->img_buffer_end - s->img_buffer);
+      if (blen < n) {
+         int res, count;
+
+         memcpy(buffer, s->img_buffer, blen);
+
+         count = (s->io.read)(s->io_user_data, (char*) buffer + blen, n - blen);
+         res = (count == (n-blen));
+         s->img_buffer = s->img_buffer_end;
+         return res;
+      }
+   }
+
+   if (s->img_buffer+n <= s->img_buffer_end) {
+      memcpy(buffer, s->img_buffer, n);
+      s->img_buffer += n;
+      return 1;
+   } else
+      return 0;
+}
+#endif
+
+#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_PSD) && defined(STBI_NO_PIC)
+// nothing
+#else
+static int stbi__get16be(stbi__context *s)
+{
+   int z = stbi__get8(s);
+   return (z << 8) + stbi__get8(s);
+}
+#endif
+
+#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD) && defined(STBI_NO_PIC)
+// nothing
+#else
+static stbi__uint32 stbi__get32be(stbi__context *s)
+{
+   stbi__uint32 z = stbi__get16be(s);
+   return (z << 16) + stbi__get16be(s);
+}
+#endif
+
+#if defined(STBI_NO_BMP) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF)
+// nothing
+#else
+static int stbi__get16le(stbi__context *s)
+{
+   int z = stbi__get8(s);
+   return z + (stbi__get8(s) << 8);
+}
+#endif
+
+#ifndef STBI_NO_BMP
+static stbi__uint32 stbi__get32le(stbi__context *s)
+{
+   stbi__uint32 z = stbi__get16le(s);
+   return z + (stbi__get16le(s) << 16);
+}
+#endif
+
+#define STBI__BYTECAST(x)  ((stbi_uc) ((x) & 255))  // truncate int to byte without warnings
+
+#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM)
+// nothing
+#else
+//////////////////////////////////////////////////////////////////////////////
+//
+//  generic converter from built-in img_n to req_comp
+//    individual types do this automatically as much as possible (e.g. jpeg
+//    does all cases internally since it needs to colorspace convert anyway,
+//    and it never has alpha, so very few cases ). png can automatically
+//    interleave an alpha=255 channel, but falls back to this for other cases
+//
+//  assume data buffer is malloced, so malloc a new one and free that one
+//  only failure mode is malloc failing
+
+static stbi_uc stbi__compute_y(int r, int g, int b)
+{
+   return (stbi_uc) (((r*77) + (g*150) +  (29*b)) >> 8);
+}
+#endif
+
+#if defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM)
+// nothing
+#else
+static unsigned char *stbi__convert_format(unsigned char *data, int img_n, int req_comp, unsigned int x, unsigned int y)
+{
+   int i,j;
+   unsigned char *good;
+
+   if (req_comp == img_n) return data;
+   STBI_ASSERT(req_comp >= 1 && req_comp <= 4);
+
+   good = (unsigned char *) stbi__malloc_mad3(req_comp, x, y, 0);
+   if (good == NULL) {
+      STBI_FREE(data);
+      return stbi__errpuc("outofmem", "Out of memory");
+   }
+
+   for (j=0; j < (int) y; ++j) {
+      unsigned char *src  = data + j * x * img_n   ;
+      unsigned char *dest = good + j * x * req_comp;
+
+      #define STBI__COMBO(a,b)  ((a)*8+(b))
+      #define STBI__CASE(a,b)   case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b)
+      // convert source image with img_n components to one with req_comp components;
+      // avoid switch per pixel, so use switch per scanline and massive macros
+      switch (STBI__COMBO(img_n, req_comp)) {
+         STBI__CASE(1,2) { dest[0]=src[0]; dest[1]=255;                                     } break;
+         STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0];                                  } break;
+         STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=255;                     } break;
+         STBI__CASE(2,1) { dest[0]=src[0];                                                  } break;
+         STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0];                                  } break;
+         STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=src[1];                  } break;
+         STBI__CASE(3,4) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];dest[3]=255;        } break;
+         STBI__CASE(3,1) { dest[0]=stbi__compute_y(src[0],src[1],src[2]);                   } break;
+         STBI__CASE(3,2) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); dest[1] = 255;    } break;
+         STBI__CASE(4,1) { dest[0]=stbi__compute_y(src[0],src[1],src[2]);                   } break;
+         STBI__CASE(4,2) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); dest[1] = src[3]; } break;
+         STBI__CASE(4,3) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];                    } break;
+         default: STBI_ASSERT(0); STBI_FREE(data); STBI_FREE(good); return stbi__errpuc("unsupported", "Unsupported format conversion");
+      }
+      #undef STBI__CASE
+   }
+
+   STBI_FREE(data);
+   return good;
+}
+#endif
+
+#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD)
+// nothing
+#else
+static stbi__uint16 stbi__compute_y_16(int r, int g, int b)
+{
+   return (stbi__uint16) (((r*77) + (g*150) +  (29*b)) >> 8);
+}
+#endif
+
+#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD)
+// nothing
+#else
+static stbi__uint16 *stbi__convert_format16(stbi__uint16 *data, int img_n, int req_comp, unsigned int x, unsigned int y)
+{
+   int i,j;
+   stbi__uint16 *good;
+
+   if (req_comp == img_n) return data;
+   STBI_ASSERT(req_comp >= 1 && req_comp <= 4);
+
+   good = (stbi__uint16 *) stbi__malloc(req_comp * x * y * 2);
+   if (good == NULL) {
+      STBI_FREE(data);
+      return (stbi__uint16 *) stbi__errpuc("outofmem", "Out of memory");
+   }
+
+   for (j=0; j < (int) y; ++j) {
+      stbi__uint16 *src  = data + j * x * img_n   ;
+      stbi__uint16 *dest = good + j * x * req_comp;
+
+      #define STBI__COMBO(a,b)  ((a)*8+(b))
+      #define STBI__CASE(a,b)   case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b)
+      // convert source image with img_n components to one with req_comp components;
+      // avoid switch per pixel, so use switch per scanline and massive macros
+      switch (STBI__COMBO(img_n, req_comp)) {
+         STBI__CASE(1,2) { dest[0]=src[0]; dest[1]=0xffff;                                     } break;
+         STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0];                                     } break;
+         STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=0xffff;                     } break;
+         STBI__CASE(2,1) { dest[0]=src[0];                                                     } break;
+         STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0];                                     } break;
+         STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=src[1];                     } break;
+         STBI__CASE(3,4) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];dest[3]=0xffff;        } break;
+         STBI__CASE(3,1) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]);                   } break;
+         STBI__CASE(3,2) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); dest[1] = 0xffff; } break;
+         STBI__CASE(4,1) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]);                   } break;
+         STBI__CASE(4,2) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); dest[1] = src[3]; } break;
+         STBI__CASE(4,3) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];                       } break;
+         default: STBI_ASSERT(0); STBI_FREE(data); STBI_FREE(good); return (stbi__uint16*) stbi__errpuc("unsupported", "Unsupported format conversion");
+      }
+      #undef STBI__CASE
+   }
+
+   STBI_FREE(data);
+   return good;
+}
+#endif
+
+#ifndef STBI_NO_LINEAR
+static float   *stbi__ldr_to_hdr(stbi_uc *data, int x, int y, int comp)
+{
+   int i,k,n;
+   float *output;
+   if (!data) return NULL;
+   output = (float *) stbi__malloc_mad4(x, y, comp, sizeof(float), 0);
+   if (output == NULL) { STBI_FREE(data); return stbi__errpf("outofmem", "Out of memory"); }
+   // compute number of non-alpha components
+   if (comp & 1) n = comp; else n = comp-1;
+   for (i=0; i < x*y; ++i) {
+      for (k=0; k < n; ++k) {
+         output[i*comp + k] = (float) (pow(data[i*comp+k]/255.0f, stbi__l2h_gamma) * stbi__l2h_scale);
+      }
+   }
+   if (n < comp) {
+      for (i=0; i < x*y; ++i) {
+         output[i*comp + n] = data[i*comp + n]/255.0f;
+      }
+   }
+   STBI_FREE(data);
+   return output;
+}
+#endif
+
+#ifndef STBI_NO_HDR
+#define stbi__float2int(x)   ((int) (x))
+static stbi_uc *stbi__hdr_to_ldr(float   *data, int x, int y, int comp)
+{
+   int i,k,n;
+   stbi_uc *output;
+   if (!data) return NULL;
+   output = (stbi_uc *) stbi__malloc_mad3(x, y, comp, 0);
+   if (output == NULL) { STBI_FREE(data); return stbi__errpuc("outofmem", "Out of memory"); }
+   // compute number of non-alpha components
+   if (comp & 1) n = comp; else n = comp-1;
+   for (i=0; i < x*y; ++i) {
+      for (k=0; k < n; ++k) {
+         float z = (float) pow(data[i*comp+k]*stbi__h2l_scale_i, stbi__h2l_gamma_i) * 255 + 0.5f;
+         if (z < 0) z = 0;
+         if (z > 255) z = 255;
+         output[i*comp + k] = (stbi_uc) stbi__float2int(z);
+      }
+      if (k < comp) {
+         float z = data[i*comp+k] * 255 + 0.5f;
+         if (z < 0) z = 0;
+         if (z > 255) z = 255;
+         output[i*comp + k] = (stbi_uc) stbi__float2int(z);
+      }
+   }
+   STBI_FREE(data);
+   return output;
+}
+#endif
+
+//////////////////////////////////////////////////////////////////////////////
+//
+//  "baseline" JPEG/JFIF decoder
+//
+//    simple implementation
+//      - doesn't support delayed output of y-dimension
+//      - simple interface (only one output format: 8-bit interleaved RGB)
+//      - doesn't try to recover corrupt jpegs
+//      - doesn't allow partial loading, loading multiple at once
+//      - still fast on x86 (copying globals into locals doesn't help x86)
+//      - allocates lots of intermediate memory (full size of all components)
+//        - non-interleaved case requires this anyway
+//        - allows good upsampling (see next)
+//    high-quality
+//      - upsampled channels are bilinearly interpolated, even across blocks
+//      - quality integer IDCT derived from IJG's 'slow'
+//    performance
+//      - fast huffman; reasonable integer IDCT
+//      - some SIMD kernels for common paths on targets with SSE2/NEON
+//      - uses a lot of intermediate memory, could cache poorly
+
+#ifndef STBI_NO_JPEG
+
+// huffman decoding acceleration
+#define FAST_BITS   9  // larger handles more cases; smaller stomps less cache
+
+typedef struct
+{
+   stbi_uc  fast[1 << FAST_BITS];
+   // weirdly, repacking this into AoS is a 10% speed loss, instead of a win
+   stbi__uint16 code[256];
+   stbi_uc  values[256];
+   stbi_uc  size[257];
+   unsigned int maxcode[18];
+   int    delta[17];   // old 'firstsymbol' - old 'firstcode'
+} stbi__huffman;
+
+typedef struct
+{
+   stbi__context *s;
+   stbi__huffman huff_dc[4];
+   stbi__huffman huff_ac[4];
+   stbi__uint16 dequant[4][64];
+   stbi__int16 fast_ac[4][1 << FAST_BITS];
+
+// sizes for components, interleaved MCUs
+   int img_h_max, img_v_max;
+   int img_mcu_x, img_mcu_y;
+   int img_mcu_w, img_mcu_h;
+
+// definition of jpeg image component
+   struct
+   {
+      int id;
+      int h,v;
+      int tq;
+      int hd,ha;
+      int dc_pred;
+
+      int x,y,w2,h2;
+      stbi_uc *data;
+      void *raw_data, *raw_coeff;
+      stbi_uc *linebuf;
+      short   *coeff;   // progressive only
+      int      coeff_w, coeff_h; // number of 8x8 coefficient blocks
+   } img_comp[4];
+
+   stbi__uint32   code_buffer; // jpeg entropy-coded buffer
+   int            code_bits;   // number of valid bits
+   unsigned char  marker;      // marker seen while filling entropy buffer
+   int            nomore;      // flag if we saw a marker so must stop
+
+   int            progressive;
+   int            spec_start;
+   int            spec_end;
+   int            succ_high;
+   int            succ_low;
+   int            eob_run;
+   int            jfif;
+   int            app14_color_transform; // Adobe APP14 tag
+   int            rgb;
+
+   int scan_n, order[4];
+   int restart_interval, todo;
+
+// kernels
+   void (*idct_block_kernel)(stbi_uc *out, int out_stride, short data[64]);
+   void (*YCbCr_to_RGB_kernel)(stbi_uc *out, const stbi_uc *y, const stbi_uc *pcb, const stbi_uc *pcr, int count, int step);
+   stbi_uc *(*resample_row_hv_2_kernel)(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs);
+} stbi__jpeg;
+
+static int stbi__build_huffman(stbi__huffman *h, int *count)
+{
+   int i,j,k=0;
+   unsigned int code;
+   // build size list for each symbol (from JPEG spec)
+   for (i=0; i < 16; ++i)
+      for (j=0; j < count[i]; ++j)
+         h->size[k++] = (stbi_uc) (i+1);
+   h->size[k] = 0;
+
+   // compute actual symbols (from jpeg spec)
+   code = 0;
+   k = 0;
+   for(j=1; j <= 16; ++j) {
+      // compute delta to add to code to compute symbol id
+      h->delta[j] = k - code;
+      if (h->size[k] == j) {
+         while (h->size[k] == j)
+            h->code[k++] = (stbi__uint16) (code++);
+         if (code-1 >= (1u << j)) return stbi__err("bad code lengths","Corrupt JPEG");
+      }
+      // compute largest code + 1 for this size, preshifted as needed later
+      h->maxcode[j] = code << (16-j);
+      code <<= 1;
+   }
+   h->maxcode[j] = 0xffffffff;
+
+   // build non-spec acceleration table; 255 is flag for not-accelerated
+   memset(h->fast, 255, 1 << FAST_BITS);
+   for (i=0; i < k; ++i) {
+      int s = h->size[i];
+      if (s <= FAST_BITS) {
+         int c = h->code[i] << (FAST_BITS-s);
+         int m = 1 << (FAST_BITS-s);
+         for (j=0; j < m; ++j) {
+            h->fast[c+j] = (stbi_uc) i;
+         }
+      }
+   }
+   return 1;
+}
+
+// build a table that decodes both magnitude and value of small ACs in
+// one go.
+static void stbi__build_fast_ac(stbi__int16 *fast_ac, stbi__huffman *h)
+{
+   int i;
+   for (i=0; i < (1 << FAST_BITS); ++i) {
+      stbi_uc fast = h->fast[i];
+      fast_ac[i] = 0;
+      if (fast < 255) {
+         int rs = h->values[fast];
+         int run = (rs >> 4) & 15;
+         int magbits = rs & 15;
+         int len = h->size[fast];
+
+         if (magbits && len + magbits <= FAST_BITS) {
+            // magnitude code followed by receive_extend code
+            int k = ((i << len) & ((1 << FAST_BITS) - 1)) >> (FAST_BITS - magbits);
+            int m = 1 << (magbits - 1);
+            if (k < m) k += (~0U << magbits) + 1;
+            // if the result is small enough, we can fit it in fast_ac table
+            if (k >= -128 && k <= 127)
+               fast_ac[i] = (stbi__int16) ((k * 256) + (run * 16) + (len + magbits));
+         }
+      }
+   }
+}
+
+static void stbi__grow_buffer_unsafe(stbi__jpeg *j)
+{
+   do {
+      unsigned int b = j->nomore ? 0 : stbi__get8(j->s);
+      if (b == 0xff) {
+         int c = stbi__get8(j->s);
+         while (c == 0xff) c = stbi__get8(j->s); // consume fill bytes
+         if (c != 0) {
+            j->marker = (unsigned char) c;
+            j->nomore = 1;
+            return;
+         }
+      }
+      j->code_buffer |= b << (24 - j->code_bits);
+      j->code_bits += 8;
+   } while (j->code_bits <= 24);
+}
+
+// (1 << n) - 1
+static const stbi__uint32 stbi__bmask[17]={0,1,3,7,15,31,63,127,255,511,1023,2047,4095,8191,16383,32767,65535};
+
+// decode a jpeg huffman value from the bitstream
+stbi_inline static int stbi__jpeg_huff_decode(stbi__jpeg *j, stbi__huffman *h)
+{
+   unsigned int temp;
+   int c,k;
+
+   if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
+
+   // look at the top FAST_BITS and determine what symbol ID it is,
+   // if the code is <= FAST_BITS
+   c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1);
+   k = h->fast[c];
+   if (k < 255) {
+      int s = h->size[k];
+      if (s > j->code_bits)
+         return -1;
+      j->code_buffer <<= s;
+      j->code_bits -= s;
+      return h->values[k];
+   }
+
+   // naive test is to shift the code_buffer down so k bits are
+   // valid, then test against maxcode. To speed this up, we've
+   // preshifted maxcode left so that it has (16-k) 0s at the
+   // end; in other words, regardless of the number of bits, it
+   // wants to be compared against something shifted to have 16;
+   // that way we don't need to shift inside the loop.
+   temp = j->code_buffer >> 16;
+   for (k=FAST_BITS+1 ; ; ++k)
+      if (temp < h->maxcode[k])
+         break;
+   if (k == 17) {
+      // error! code not found
+      j->code_bits -= 16;
+      return -1;
+   }
+
+   if (k > j->code_bits)
+      return -1;
+
+   // convert the huffman code to the symbol id
+   c = ((j->code_buffer >> (32 - k)) & stbi__bmask[k]) + h->delta[k];
+   STBI_ASSERT((((j->code_buffer) >> (32 - h->size[c])) & stbi__bmask[h->size[c]]) == h->code[c]);
+
+   // convert the id to a symbol
+   j->code_bits -= k;
+   j->code_buffer <<= k;
+   return h->values[c];
+}
+
+// bias[n] = (-1<<n) + 1
+static const int stbi__jbias[16] = {0,-1,-3,-7,-15,-31,-63,-127,-255,-511,-1023,-2047,-4095,-8191,-16383,-32767};
+
+// combined JPEG 'receive' and JPEG 'extend', since baseline
+// always extends everything it receives.
+stbi_inline static int stbi__extend_receive(stbi__jpeg *j, int n)
+{
+   unsigned int k;
+   int sgn;
+   if (j->code_bits < n) stbi__grow_buffer_unsafe(j);
+
+   sgn = (stbi__int32)j->code_buffer >> 31; // sign bit is always in MSB
+   k = stbi_lrot(j->code_buffer, n);
+   if (n < 0 || n >= (int) (sizeof(stbi__bmask)/sizeof(*stbi__bmask))) return 0;
+   j->code_buffer = k & ~stbi__bmask[n];
+   k &= stbi__bmask[n];
+   j->code_bits -= n;
+   return k + (stbi__jbias[n] & ~sgn);
+}
+
+// get some unsigned bits
+stbi_inline static int stbi__jpeg_get_bits(stbi__jpeg *j, int n)
+{
+   unsigned int k;
+   if (j->code_bits < n) stbi__grow_buffer_unsafe(j);
+   k = stbi_lrot(j->code_buffer, n);
+   j->code_buffer = k & ~stbi__bmask[n];
+   k &= stbi__bmask[n];
+   j->code_bits -= n;
+   return k;
+}
+
+stbi_inline static int stbi__jpeg_get_bit(stbi__jpeg *j)
+{
+   unsigned int k;
+   if (j->code_bits < 1) stbi__grow_buffer_unsafe(j);
+   k = j->code_buffer;
+   j->code_buffer <<= 1;
+   --j->code_bits;
+   return k & 0x80000000;
+}
+
+// given a value that's at position X in the zigzag stream,
+// where does it appear in the 8x8 matrix coded as row-major?
+static const stbi_uc stbi__jpeg_dezigzag[64+15] =
+{
+    0,  1,  8, 16,  9,  2,  3, 10,
+   17, 24, 32, 25, 18, 11,  4,  5,
+   12, 19, 26, 33, 40, 48, 41, 34,
+   27, 20, 13,  6,  7, 14, 21, 28,
+   35, 42, 49, 56, 57, 50, 43, 36,
+   29, 22, 15, 23, 30, 37, 44, 51,
+   58, 59, 52, 45, 38, 31, 39, 46,
+   53, 60, 61, 54, 47, 55, 62, 63,
+   // let corrupt input sample past end
+   63, 63, 63, 63, 63, 63, 63, 63,
+   63, 63, 63, 63, 63, 63, 63
+};
+
+// decode one 64-entry block--
+static int stbi__jpeg_decode_block(stbi__jpeg *j, short data[64], stbi__huffman *hdc, stbi__huffman *hac, stbi__int16 *fac, int b, stbi__uint16 *dequant)
+{
+   int diff,dc,k;
+   int t;
+
+   if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
+   t = stbi__jpeg_huff_decode(j, hdc);
+   if (t < 0) return stbi__err("bad huffman code","Corrupt JPEG");
+
+   // 0 all the ac values now so we can do it 32-bits at a time
+   memset(data,0,64*sizeof(data[0]));
+
+   diff = t ? stbi__extend_receive(j, t) : 0;
+   dc = j->img_comp[b].dc_pred + diff;
+   j->img_comp[b].dc_pred = dc;
+   data[0] = (short) (dc * dequant[0]);
+
+   // decode AC components, see JPEG spec
+   k = 1;
+   do {
+      unsigned int zig;
+      int c,r,s;
+      if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
+      c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1);
+      r = fac[c];
+      if (r) { // fast-AC path
+         k += (r >> 4) & 15; // run
+         s = r & 15; // combined length
+         j->code_buffer <<= s;
+         j->code_bits -= s;
+         // decode into unzigzag'd location
+         zig = stbi__jpeg_dezigzag[k++];
+         data[zig] = (short) ((r >> 8) * dequant[zig]);
+      } else {
+         int rs = stbi__jpeg_huff_decode(j, hac);
+         if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG");
+         s = rs & 15;
+         r = rs >> 4;
+         if (s == 0) {
+            if (rs != 0xf0) break; // end block
+            k += 16;
+         } else {
+            k += r;
+            // decode into unzigzag'd location
+            zig = stbi__jpeg_dezigzag[k++];
+            data[zig] = (short) (stbi__extend_receive(j,s) * dequant[zig]);
+         }
+      }
+   } while (k < 64);
+   return 1;
+}
+
+static int stbi__jpeg_decode_block_prog_dc(stbi__jpeg *j, short data[64], stbi__huffman *hdc, int b)
+{
+   int diff,dc;
+   int t;
+   if (j->spec_end != 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
+
+   if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
+
+   if (j->succ_high == 0) {
+      // first scan for DC coefficient, must be first
+      memset(data,0,64*sizeof(data[0])); // 0 all the ac values now
+      t = stbi__jpeg_huff_decode(j, hdc);
+      if (t == -1) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
+      diff = t ? stbi__extend_receive(j, t) : 0;
+
+      dc = j->img_comp[b].dc_pred + diff;
+      j->img_comp[b].dc_pred = dc;
+      data[0] = (short) (dc << j->succ_low);
+   } else {
+      // refinement scan for DC coefficient
+      if (stbi__jpeg_get_bit(j))
+         data[0] += (short) (1 << j->succ_low);
+   }
+   return 1;
+}
+
+// @OPTIMIZE: store non-zigzagged during the decode passes,
+// and only de-zigzag when dequantizing
+static int stbi__jpeg_decode_block_prog_ac(stbi__jpeg *j, short data[64], stbi__huffman *hac, stbi__int16 *fac)
+{
+   int k;
+   if (j->spec_start == 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
+
+   if (j->succ_high == 0) {
+      int shift = j->succ_low;
+
+      if (j->eob_run) {
+         --j->eob_run;
+         return 1;
+      }
+
+      k = j->spec_start;
+      do {
+         unsigned int zig;
+         int c,r,s;
+         if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
+         c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1);
+         r = fac[c];
+         if (r) { // fast-AC path
+            k += (r >> 4) & 15; // run
+            s = r & 15; // combined length
+            j->code_buffer <<= s;
+            j->code_bits -= s;
+            zig = stbi__jpeg_dezigzag[k++];
+            data[zig] = (short) ((r >> 8) << shift);
+         } else {
+            int rs = stbi__jpeg_huff_decode(j, hac);
+            if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG");
+            s = rs & 15;
+            r = rs >> 4;
+            if (s == 0) {
+               if (r < 15) {
+                  j->eob_run = (1 << r);
+                  if (r)
+                     j->eob_run += stbi__jpeg_get_bits(j, r);
+                  --j->eob_run;
+                  break;
+               }
+               k += 16;
+            } else {
+               k += r;
+               zig = stbi__jpeg_dezigzag[k++];
+               data[zig] = (short) (stbi__extend_receive(j,s) << shift);
+            }
+         }
+      } while (k <= j->spec_end);
+   } else {
+      // refinement scan for these AC coefficients
+
+      short bit = (short) (1 << j->succ_low);
+
+      if (j->eob_run) {
+         --j->eob_run;
+         for (k = j->spec_start; k <= j->spec_end; ++k) {
+            short *p = &data[stbi__jpeg_dezigzag[k]];
+            if (*p != 0)
+               if (stbi__jpeg_get_bit(j))
+                  if ((*p & bit)==0) {
+                     if (*p > 0)
+                        *p += bit;
+                     else
+                        *p -= bit;
+                  }
+         }
+      } else {
+         k = j->spec_start;
+         do {
+            int r,s;
+            int rs = stbi__jpeg_huff_decode(j, hac); // @OPTIMIZE see if we can use the fast path here, advance-by-r is so slow, eh
+            if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG");
+            s = rs & 15;
+            r = rs >> 4;
+            if (s == 0) {
+               if (r < 15) {
+                  j->eob_run = (1 << r) - 1;
+                  if (r)
+                     j->eob_run += stbi__jpeg_get_bits(j, r);
+                  r = 64; // force end of block
+               } else {
+                  // r=15 s=0 should write 16 0s, so we just do
+                  // a run of 15 0s and then write s (which is 0),
+                  // so we don't have to do anything special here
+               }
+            } else {
+               if (s != 1) return stbi__err("bad huffman code", "Corrupt JPEG");
+               // sign bit
+               if (stbi__jpeg_get_bit(j))
+                  s = bit;
+               else
+                  s = -bit;
+            }
+
+            // advance by r
+            while (k <= j->spec_end) {
+               short *p = &data[stbi__jpeg_dezigzag[k++]];
+               if (*p != 0) {
+                  if (stbi__jpeg_get_bit(j))
+                     if ((*p & bit)==0) {
+                        if (*p > 0)
+                           *p += bit;
+                        else
+                           *p -= bit;
+                     }
+               } else {
+                  if (r == 0) {
+                     *p = (short) s;
+                     break;
+                  }
+                  --r;
+               }
+            }
+         } while (k <= j->spec_end);
+      }
+   }
+   return 1;
+}
+
+// take a -128..127 value and stbi__clamp it and convert to 0..255
+stbi_inline static stbi_uc stbi__clamp(int x)
+{
+   // trick to use a single test to catch both cases
+   if ((unsigned int) x > 255) {
+      if (x < 0) return 0;
+      if (x > 255) return 255;
+   }
+   return (stbi_uc) x;
+}
+
+#define stbi__f2f(x)  ((int) (((x) * 4096 + 0.5)))
+#define stbi__fsh(x)  ((x) * 4096)
+
+// derived from jidctint -- DCT_ISLOW
+#define STBI__IDCT_1D(s0,s1,s2,s3,s4,s5,s6,s7) \
+   int t0,t1,t2,t3,p1,p2,p3,p4,p5,x0,x1,x2,x3; \
+   p2 = s2;                                    \
+   p3 = s6;                                    \
+   p1 = (p2+p3) * stbi__f2f(0.5411961f);       \
+   t2 = p1 + p3*stbi__f2f(-1.847759065f);      \
+   t3 = p1 + p2*stbi__f2f( 0.765366865f);      \
+   p2 = s0;                                    \
+   p3 = s4;                                    \
+   t0 = stbi__fsh(p2+p3);                      \
+   t1 = stbi__fsh(p2-p3);                      \
+   x0 = t0+t3;                                 \
+   x3 = t0-t3;                                 \
+   x1 = t1+t2;                                 \
+   x2 = t1-t2;                                 \
+   t0 = s7;                                    \
+   t1 = s5;                                    \
+   t2 = s3;                                    \
+   t3 = s1;                                    \
+   p3 = t0+t2;                                 \
+   p4 = t1+t3;                                 \
+   p1 = t0+t3;                                 \
+   p2 = t1+t2;                                 \
+   p5 = (p3+p4)*stbi__f2f( 1.175875602f);      \
+   t0 = t0*stbi__f2f( 0.298631336f);           \
+   t1 = t1*stbi__f2f( 2.053119869f);           \
+   t2 = t2*stbi__f2f( 3.072711026f);           \
+   t3 = t3*stbi__f2f( 1.501321110f);           \
+   p1 = p5 + p1*stbi__f2f(-0.899976223f);      \
+   p2 = p5 + p2*stbi__f2f(-2.562915447f);      \
+   p3 = p3*stbi__f2f(-1.961570560f);           \
+   p4 = p4*stbi__f2f(-0.390180644f);           \
+   t3 += p1+p4;                                \
+   t2 += p2+p3;                                \
+   t1 += p2+p4;                                \
+   t0 += p1+p3;
+
+static void stbi__idct_block(stbi_uc *out, int out_stride, short data[64])
+{
+   int i,val[64],*v=val;
+   stbi_uc *o;
+   short *d = data;
+
+   // columns
+   for (i=0; i < 8; ++i,++d, ++v) {
+      // if all zeroes, shortcut -- this avoids dequantizing 0s and IDCTing
+      if (d[ 8]==0 && d[16]==0 && d[24]==0 && d[32]==0
+           && d[40]==0 && d[48]==0 && d[56]==0) {
+         //    no shortcut                 0     seconds
+         //    (1|2|3|4|5|6|7)==0          0     seconds
+         //    all separate               -0.047 seconds
+         //    1 && 2|3 && 4|5 && 6|7:    -0.047 seconds
+         int dcterm = d[0]*4;
+         v[0] = v[8] = v[16] = v[24] = v[32] = v[40] = v[48] = v[56] = dcterm;
+      } else {
+         STBI__IDCT_1D(d[ 0],d[ 8],d[16],d[24],d[32],d[40],d[48],d[56])
+         // constants scaled things up by 1<<12; let's bring them back
+         // down, but keep 2 extra bits of precision
+         x0 += 512; x1 += 512; x2 += 512; x3 += 512;
+         v[ 0] = (x0+t3) >> 10;
+         v[56] = (x0-t3) >> 10;
+         v[ 8] = (x1+t2) >> 10;
+         v[48] = (x1-t2) >> 10;
+         v[16] = (x2+t1) >> 10;
+         v[40] = (x2-t1) >> 10;
+         v[24] = (x3+t0) >> 10;
+         v[32] = (x3-t0) >> 10;
+      }
+   }
+
+   for (i=0, v=val, o=out; i < 8; ++i,v+=8,o+=out_stride) {
+      // no fast case since the first 1D IDCT spread components out
+      STBI__IDCT_1D(v[0],v[1],v[2],v[3],v[4],v[5],v[6],v[7])
+      // constants scaled things up by 1<<12, plus we had 1<<2 from first
+      // loop, plus horizontal and vertical each scale by sqrt(8) so together
+      // we've got an extra 1<<3, so 1<<17 total we need to remove.
+      // so we want to round that, which means adding 0.5 * 1<<17,
+      // aka 65536. Also, we'll end up with -128 to 127 that we want
+      // to encode as 0..255 by adding 128, so we'll add that before the shift
+      x0 += 65536 + (128<<17);
+      x1 += 65536 + (128<<17);
+      x2 += 65536 + (128<<17);
+      x3 += 65536 + (128<<17);
+      // tried computing the shifts into temps, or'ing the temps to see
+      // if any were out of range, but that was slower
+      o[0] = stbi__clamp((x0+t3) >> 17);
+      o[7] = stbi__clamp((x0-t3) >> 17);
+      o[1] = stbi__clamp((x1+t2) >> 17);
+      o[6] = stbi__clamp((x1-t2) >> 17);
+      o[2] = stbi__clamp((x2+t1) >> 17);
+      o[5] = stbi__clamp((x2-t1) >> 17);
+      o[3] = stbi__clamp((x3+t0) >> 17);
+      o[4] = stbi__clamp((x3-t0) >> 17);
+   }
+}
+
+#ifdef STBI_SSE2
+// sse2 integer IDCT. not the fastest possible implementation but it
+// produces bit-identical results to the generic C version so it's
+// fully "transparent".
+static void stbi__idct_simd(stbi_uc *out, int out_stride, short data[64])
+{
+   // This is constructed to match our regular (generic) integer IDCT exactly.
+   __m128i row0, row1, row2, row3, row4, row5, row6, row7;
+   __m128i tmp;
+
+   // dot product constant: even elems=x, odd elems=y
+   #define dct_const(x,y)  _mm_setr_epi16((x),(y),(x),(y),(x),(y),(x),(y))
+
+   // out(0) = c0[even]*x + c0[odd]*y   (c0, x, y 16-bit, out 32-bit)
+   // out(1) = c1[even]*x + c1[odd]*y
+   #define dct_rot(out0,out1, x,y,c0,c1) \
+      __m128i c0##lo = _mm_unpacklo_epi16((x),(y)); \
+      __m128i c0##hi = _mm_unpackhi_epi16((x),(y)); \
+      __m128i out0##_l = _mm_madd_epi16(c0##lo, c0); \
+      __m128i out0##_h = _mm_madd_epi16(c0##hi, c0); \
+      __m128i out1##_l = _mm_madd_epi16(c0##lo, c1); \
+      __m128i out1##_h = _mm_madd_epi16(c0##hi, c1)
+
+   // out = in << 12  (in 16-bit, out 32-bit)
+   #define dct_widen(out, in) \
+      __m128i out##_l = _mm_srai_epi32(_mm_unpacklo_epi16(_mm_setzero_si128(), (in)), 4); \
+      __m128i out##_h = _mm_srai_epi32(_mm_unpackhi_epi16(_mm_setzero_si128(), (in)), 4)
+
+   // wide add
+   #define dct_wadd(out, a, b) \
+      __m128i out##_l = _mm_add_epi32(a##_l, b##_l); \
+      __m128i out##_h = _mm_add_epi32(a##_h, b##_h)
+
+   // wide sub
+   #define dct_wsub(out, a, b) \
+      __m128i out##_l = _mm_sub_epi32(a##_l, b##_l); \
+      __m128i out##_h = _mm_sub_epi32(a##_h, b##_h)
+
+   // butterfly a/b, add bias, then shift by "s" and pack
+   #define dct_bfly32o(out0, out1, a,b,bias,s) \
+      { \
+         __m128i abiased_l = _mm_add_epi32(a##_l, bias); \
+         __m128i abiased_h = _mm_add_epi32(a##_h, bias); \
+         dct_wadd(sum, abiased, b); \
+         dct_wsub(dif, abiased, b); \
+         out0 = _mm_packs_epi32(_mm_srai_epi32(sum_l, s), _mm_srai_epi32(sum_h, s)); \
+         out1 = _mm_packs_epi32(_mm_srai_epi32(dif_l, s), _mm_srai_epi32(dif_h, s)); \
+      }
+
+   // 8-bit interleave step (for transposes)
+   #define dct_interleave8(a, b) \
+      tmp = a; \
+      a = _mm_unpacklo_epi8(a, b); \
+      b = _mm_unpackhi_epi8(tmp, b)
+
+   // 16-bit interleave step (for transposes)
+   #define dct_interleave16(a, b) \
+      tmp = a; \
+      a = _mm_unpacklo_epi16(a, b); \
+      b = _mm_unpackhi_epi16(tmp, b)
+
+   #define dct_pass(bias,shift) \
+      { \
+         /* even part */ \
+         dct_rot(t2e,t3e, row2,row6, rot0_0,rot0_1); \
+         __m128i sum04 = _mm_add_epi16(row0, row4); \
+         __m128i dif04 = _mm_sub_epi16(row0, row4); \
+         dct_widen(t0e, sum04); \
+         dct_widen(t1e, dif04); \
+         dct_wadd(x0, t0e, t3e); \
+         dct_wsub(x3, t0e, t3e); \
+         dct_wadd(x1, t1e, t2e); \
+         dct_wsub(x2, t1e, t2e); \
+         /* odd part */ \
+         dct_rot(y0o,y2o, row7,row3, rot2_0,rot2_1); \
+         dct_rot(y1o,y3o, row5,row1, rot3_0,rot3_1); \
+         __m128i sum17 = _mm_add_epi16(row1, row7); \
+         __m128i sum35 = _mm_add_epi16(row3, row5); \
+         dct_rot(y4o,y5o, sum17,sum35, rot1_0,rot1_1); \
+         dct_wadd(x4, y0o, y4o); \
+         dct_wadd(x5, y1o, y5o); \
+         dct_wadd(x6, y2o, y5o); \
+         dct_wadd(x7, y3o, y4o); \
+         dct_bfly32o(row0,row7, x0,x7,bias,shift); \
+         dct_bfly32o(row1,row6, x1,x6,bias,shift); \
+         dct_bfly32o(row2,row5, x2,x5,bias,shift); \
+         dct_bfly32o(row3,row4, x3,x4,bias,shift); \
+      }
+
+   __m128i rot0_0 = dct_const(stbi__f2f(0.5411961f), stbi__f2f(0.5411961f) + stbi__f2f(-1.847759065f));
+   __m128i rot0_1 = dct_const(stbi__f2f(0.5411961f) + stbi__f2f( 0.765366865f), stbi__f2f(0.5411961f));
+   __m128i rot1_0 = dct_const(stbi__f2f(1.175875602f) + stbi__f2f(-0.899976223f), stbi__f2f(1.175875602f));
+   __m128i rot1_1 = dct_const(stbi__f2f(1.175875602f), stbi__f2f(1.175875602f) + stbi__f2f(-2.562915447f));
+   __m128i rot2_0 = dct_const(stbi__f2f(-1.961570560f) + stbi__f2f( 0.298631336f), stbi__f2f(-1.961570560f));
+   __m128i rot2_1 = dct_const(stbi__f2f(-1.961570560f), stbi__f2f(-1.961570560f) + stbi__f2f( 3.072711026f));
+   __m128i rot3_0 = dct_const(stbi__f2f(-0.390180644f) + stbi__f2f( 2.053119869f), stbi__f2f(-0.390180644f));
+   __m128i rot3_1 = dct_const(stbi__f2f(-0.390180644f), stbi__f2f(-0.390180644f) + stbi__f2f( 1.501321110f));
+
+   // rounding biases in column/row passes, see stbi__idct_block for explanation.
+   __m128i bias_0 = _mm_set1_epi32(512);
+   __m128i bias_1 = _mm_set1_epi32(65536 + (128<<17));
+
+   // load
+   row0 = _mm_load_si128((const __m128i *) (data + 0*8));
+   row1 = _mm_load_si128((const __m128i *) (data + 1*8));
+   row2 = _mm_load_si128((const __m128i *) (data + 2*8));
+   row3 = _mm_load_si128((const __m128i *) (data + 3*8));
+   row4 = _mm_load_si128((const __m128i *) (data + 4*8));
+   row5 = _mm_load_si128((const __m128i *) (data + 5*8));
+   row6 = _mm_load_si128((const __m128i *) (data + 6*8));
+   row7 = _mm_load_si128((const __m128i *) (data + 7*8));
+
+   // column pass
+   dct_pass(bias_0, 10);
+
+   {
+      // 16bit 8x8 transpose pass 1
+      dct_interleave16(row0, row4);
+      dct_interleave16(row1, row5);
+      dct_interleave16(row2, row6);
+      dct_interleave16(row3, row7);
+
+      // transpose pass 2
+      dct_interleave16(row0, row2);
+      dct_interleave16(row1, row3);
+      dct_interleave16(row4, row6);
+      dct_interleave16(row5, row7);
+
+      // transpose pass 3
+      dct_interleave16(row0, row1);
+      dct_interleave16(row2, row3);
+      dct_interleave16(row4, row5);
+      dct_interleave16(row6, row7);
+   }
+
+   // row pass
+   dct_pass(bias_1, 17);
+
+   {
+      // pack
+      __m128i p0 = _mm_packus_epi16(row0, row1); // a0a1a2a3...a7b0b1b2b3...b7
+      __m128i p1 = _mm_packus_epi16(row2, row3);
+      __m128i p2 = _mm_packus_epi16(row4, row5);
+      __m128i p3 = _mm_packus_epi16(row6, row7);
+
+      // 8bit 8x8 transpose pass 1
+      dct_interleave8(p0, p2); // a0e0a1e1...
+      dct_interleave8(p1, p3); // c0g0c1g1...
+
+      // transpose pass 2
+      dct_interleave8(p0, p1); // a0c0e0g0...
+      dct_interleave8(p2, p3); // b0d0f0h0...
+
+      // transpose pass 3
+      dct_interleave8(p0, p2); // a0b0c0d0...
+      dct_interleave8(p1, p3); // a4b4c4d4...
+
+      // store
+      _mm_storel_epi64((__m128i *) out, p0); out += out_stride;
+      _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p0, 0x4e)); out += out_stride;
+      _mm_storel_epi64((__m128i *) out, p2); out += out_stride;
+      _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p2, 0x4e)); out += out_stride;
+      _mm_storel_epi64((__m128i *) out, p1); out += out_stride;
+      _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p1, 0x4e)); out += out_stride;
+      _mm_storel_epi64((__m128i *) out, p3); out += out_stride;
+      _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p3, 0x4e));
+   }
+
+#undef dct_const
+#undef dct_rot
+#undef dct_widen
+#undef dct_wadd
+#undef dct_wsub
+#undef dct_bfly32o
+#undef dct_interleave8
+#undef dct_interleave16
+#undef dct_pass
+}
+
+#endif // STBI_SSE2
+
+#ifdef STBI_NEON
+
+// NEON integer IDCT. should produce bit-identical
+// results to the generic C version.
+static void stbi__idct_simd(stbi_uc *out, int out_stride, short data[64])
+{
+   int16x8_t row0, row1, row2, row3, row4, row5, row6, row7;
+
+   int16x4_t rot0_0 = vdup_n_s16(stbi__f2f(0.5411961f));
+   int16x4_t rot0_1 = vdup_n_s16(stbi__f2f(-1.847759065f));
+   int16x4_t rot0_2 = vdup_n_s16(stbi__f2f( 0.765366865f));
+   int16x4_t rot1_0 = vdup_n_s16(stbi__f2f( 1.175875602f));
+   int16x4_t rot1_1 = vdup_n_s16(stbi__f2f(-0.899976223f));
+   int16x4_t rot1_2 = vdup_n_s16(stbi__f2f(-2.562915447f));
+   int16x4_t rot2_0 = vdup_n_s16(stbi__f2f(-1.961570560f));
+   int16x4_t rot2_1 = vdup_n_s16(stbi__f2f(-0.390180644f));
+   int16x4_t rot3_0 = vdup_n_s16(stbi__f2f( 0.298631336f));
+   int16x4_t rot3_1 = vdup_n_s16(stbi__f2f( 2.053119869f));
+   int16x4_t rot3_2 = vdup_n_s16(stbi__f2f( 3.072711026f));
+   int16x4_t rot3_3 = vdup_n_s16(stbi__f2f( 1.501321110f));
+
+#define dct_long_mul(out, inq, coeff) \
+   int32x4_t out##_l = vmull_s16(vget_low_s16(inq), coeff); \
+   int32x4_t out##_h = vmull_s16(vget_high_s16(inq), coeff)
+
+#define dct_long_mac(out, acc, inq, coeff) \
+   int32x4_t out##_l = vmlal_s16(acc##_l, vget_low_s16(inq), coeff); \
+   int32x4_t out##_h = vmlal_s16(acc##_h, vget_high_s16(inq), coeff)
+
+#define dct_widen(out, inq) \
+   int32x4_t out##_l = vshll_n_s16(vget_low_s16(inq), 12); \
+   int32x4_t out##_h = vshll_n_s16(vget_high_s16(inq), 12)
+
+// wide add
+#define dct_wadd(out, a, b) \
+   int32x4_t out##_l = vaddq_s32(a##_l, b##_l); \
+   int32x4_t out##_h = vaddq_s32(a##_h, b##_h)
+
+// wide sub
+#define dct_wsub(out, a, b) \
+   int32x4_t out##_l = vsubq_s32(a##_l, b##_l); \
+   int32x4_t out##_h = vsubq_s32(a##_h, b##_h)
+
+// butterfly a/b, then shift using "shiftop" by "s" and pack
+#define dct_bfly32o(out0,out1, a,b,shiftop,s) \
+   { \
+      dct_wadd(sum, a, b); \
+      dct_wsub(dif, a, b); \
+      out0 = vcombine_s16(shiftop(sum_l, s), shiftop(sum_h, s)); \
+      out1 = vcombine_s16(shiftop(dif_l, s), shiftop(dif_h, s)); \
+   }
+
+#define dct_pass(shiftop, shift) \
+   { \
+      /* even part */ \
+      int16x8_t sum26 = vaddq_s16(row2, row6); \
+      dct_long_mul(p1e, sum26, rot0_0); \
+      dct_long_mac(t2e, p1e, row6, rot0_1); \
+      dct_long_mac(t3e, p1e, row2, rot0_2); \
+      int16x8_t sum04 = vaddq_s16(row0, row4); \
+      int16x8_t dif04 = vsubq_s16(row0, row4); \
+      dct_widen(t0e, sum04); \
+      dct_widen(t1e, dif04); \
+      dct_wadd(x0, t0e, t3e); \
+      dct_wsub(x3, t0e, t3e); \
+      dct_wadd(x1, t1e, t2e); \
+      dct_wsub(x2, t1e, t2e); \
+      /* odd part */ \
+      int16x8_t sum15 = vaddq_s16(row1, row5); \
+      int16x8_t sum17 = vaddq_s16(row1, row7); \
+      int16x8_t sum35 = vaddq_s16(row3, row5); \
+      int16x8_t sum37 = vaddq_s16(row3, row7); \
+      int16x8_t sumodd = vaddq_s16(sum17, sum35); \
+      dct_long_mul(p5o, sumodd, rot1_0); \
+      dct_long_mac(p1o, p5o, sum17, rot1_1); \
+      dct_long_mac(p2o, p5o, sum35, rot1_2); \
+      dct_long_mul(p3o, sum37, rot2_0); \
+      dct_long_mul(p4o, sum15, rot2_1); \
+      dct_wadd(sump13o, p1o, p3o); \
+      dct_wadd(sump24o, p2o, p4o); \
+      dct_wadd(sump23o, p2o, p3o); \
+      dct_wadd(sump14o, p1o, p4o); \
+      dct_long_mac(x4, sump13o, row7, rot3_0); \
+      dct_long_mac(x5, sump24o, row5, rot3_1); \
+      dct_long_mac(x6, sump23o, row3, rot3_2); \
+      dct_long_mac(x7, sump14o, row1, rot3_3); \
+      dct_bfly32o(row0,row7, x0,x7,shiftop,shift); \
+      dct_bfly32o(row1,row6, x1,x6,shiftop,shift); \
+      dct_bfly32o(row2,row5, x2,x5,shiftop,shift); \
+      dct_bfly32o(row3,row4, x3,x4,shiftop,shift); \
+   }
+
+   // load
+   row0 = vld1q_s16(data + 0*8);
+   row1 = vld1q_s16(data + 1*8);
+   row2 = vld1q_s16(data + 2*8);
+   row3 = vld1q_s16(data + 3*8);
+   row4 = vld1q_s16(data + 4*8);
+   row5 = vld1q_s16(data + 5*8);
+   row6 = vld1q_s16(data + 6*8);
+   row7 = vld1q_s16(data + 7*8);
+
+   // add DC bias
+   row0 = vaddq_s16(row0, vsetq_lane_s16(1024, vdupq_n_s16(0), 0));
+
+   // column pass
+   dct_pass(vrshrn_n_s32, 10);
+
+   // 16bit 8x8 transpose
+   {
+// these three map to a single VTRN.16, VTRN.32, and VSWP, respectively.
+// whether compilers actually get this is another story, sadly.
+#define dct_trn16(x, y) { int16x8x2_t t = vtrnq_s16(x, y); x = t.val[0]; y = t.val[1]; }
+#define dct_trn32(x, y) { int32x4x2_t t = vtrnq_s32(vreinterpretq_s32_s16(x), vreinterpretq_s32_s16(y)); x = vreinterpretq_s16_s32(t.val[0]); y = vreinterpretq_s16_s32(t.val[1]); }
+#define dct_trn64(x, y) { int16x8_t x0 = x; int16x8_t y0 = y; x = vcombine_s16(vget_low_s16(x0), vget_low_s16(y0)); y = vcombine_s16(vget_high_s16(x0), vget_high_s16(y0)); }
+
+      // pass 1
+      dct_trn16(row0, row1); // a0b0a2b2a4b4a6b6
+      dct_trn16(row2, row3);
+      dct_trn16(row4, row5);
+      dct_trn16(row6, row7);
+
+      // pass 2
+      dct_trn32(row0, row2); // a0b0c0d0a4b4c4d4
+      dct_trn32(row1, row3);
+      dct_trn32(row4, row6);
+      dct_trn32(row5, row7);
+
+      // pass 3
+      dct_trn64(row0, row4); // a0b0c0d0e0f0g0h0
+      dct_trn64(row1, row5);
+      dct_trn64(row2, row6);
+      dct_trn64(row3, row7);
+
+#undef dct_trn16
+#undef dct_trn32
+#undef dct_trn64
+   }
+
+   // row pass
+   // vrshrn_n_s32 only supports shifts up to 16, we need
+   // 17. so do a non-rounding shift of 16 first then follow
+   // up with a rounding shift by 1.
+   dct_pass(vshrn_n_s32, 16);
+
+   {
+      // pack and round
+      uint8x8_t p0 = vqrshrun_n_s16(row0, 1);
+      uint8x8_t p1 = vqrshrun_n_s16(row1, 1);
+      uint8x8_t p2 = vqrshrun_n_s16(row2, 1);
+      uint8x8_t p3 = vqrshrun_n_s16(row3, 1);
+      uint8x8_t p4 = vqrshrun_n_s16(row4, 1);
+      uint8x8_t p5 = vqrshrun_n_s16(row5, 1);
+      uint8x8_t p6 = vqrshrun_n_s16(row6, 1);
+      uint8x8_t p7 = vqrshrun_n_s16(row7, 1);
+
+      // again, these can translate into one instruction, but often don't.
+#define dct_trn8_8(x, y) { uint8x8x2_t t = vtrn_u8(x, y); x = t.val[0]; y = t.val[1]; }
+#define dct_trn8_16(x, y) { uint16x4x2_t t = vtrn_u16(vreinterpret_u16_u8(x), vreinterpret_u16_u8(y)); x = vreinterpret_u8_u16(t.val[0]); y = vreinterpret_u8_u16(t.val[1]); }
+#define dct_trn8_32(x, y) { uint32x2x2_t t = vtrn_u32(vreinterpret_u32_u8(x), vreinterpret_u32_u8(y)); x = vreinterpret_u8_u32(t.val[0]); y = vreinterpret_u8_u32(t.val[1]); }
+
+      // sadly can't use interleaved stores here since we only write
+      // 8 bytes to each scan line!
+
+      // 8x8 8-bit transpose pass 1
+      dct_trn8_8(p0, p1);
+      dct_trn8_8(p2, p3);
+      dct_trn8_8(p4, p5);
+      dct_trn8_8(p6, p7);
+
+      // pass 2
+      dct_trn8_16(p0, p2);
+      dct_trn8_16(p1, p3);
+      dct_trn8_16(p4, p6);
+      dct_trn8_16(p5, p7);
+
+      // pass 3
+      dct_trn8_32(p0, p4);
+      dct_trn8_32(p1, p5);
+      dct_trn8_32(p2, p6);
+      dct_trn8_32(p3, p7);
+
+      // store
+      vst1_u8(out, p0); out += out_stride;
+      vst1_u8(out, p1); out += out_stride;
+      vst1_u8(out, p2); out += out_stride;
+      vst1_u8(out, p3); out += out_stride;
+      vst1_u8(out, p4); out += out_stride;
+      vst1_u8(out, p5); out += out_stride;
+      vst1_u8(out, p6); out += out_stride;
+      vst1_u8(out, p7);
+
+#undef dct_trn8_8
+#undef dct_trn8_16
+#undef dct_trn8_32
+   }
+
+#undef dct_long_mul
+#undef dct_long_mac
+#undef dct_widen
+#undef dct_wadd
+#undef dct_wsub
+#undef dct_bfly32o
+#undef dct_pass
+}
+
+#endif // STBI_NEON
+
+#define STBI__MARKER_none  0xff
+// if there's a pending marker from the entropy stream, return that
+// otherwise, fetch from the stream and get a marker. if there's no
+// marker, return 0xff, which is never a valid marker value
+static stbi_uc stbi__get_marker(stbi__jpeg *j)
+{
+   stbi_uc x;
+   if (j->marker != STBI__MARKER_none) { x = j->marker; j->marker = STBI__MARKER_none; return x; }
+   x = stbi__get8(j->s);
+   if (x != 0xff) return STBI__MARKER_none;
+   while (x == 0xff)
+      x = stbi__get8(j->s); // consume repeated 0xff fill bytes
+   return x;
+}
+
+// in each scan, we'll have scan_n components, and the order
+// of the components is specified by order[]
+#define STBI__RESTART(x)     ((x) >= 0xd0 && (x) <= 0xd7)
+
+// after a restart interval, stbi__jpeg_reset the entropy decoder and
+// the dc prediction
+static void stbi__jpeg_reset(stbi__jpeg *j)
+{
+   j->code_bits = 0;
+   j->code_buffer = 0;
+   j->nomore = 0;
+   j->img_comp[0].dc_pred = j->img_comp[1].dc_pred = j->img_comp[2].dc_pred = j->img_comp[3].dc_pred = 0;
+   j->marker = STBI__MARKER_none;
+   j->todo = j->restart_interval ? j->restart_interval : 0x7fffffff;
+   j->eob_run = 0;
+   // no more than 1<<31 MCUs if no restart_interal? that's plenty safe,
+   // since we don't even allow 1<<30 pixels
+}
+
+static int stbi__parse_entropy_coded_data(stbi__jpeg *z)
+{
+   stbi__jpeg_reset(z);
+   if (!z->progressive) {
+      if (z->scan_n == 1) {
+         int i,j;
+         STBI_SIMD_ALIGN(short, data[64]);
+         int n = z->order[0];
+         // non-interleaved data, we just need to process one block at a time,
+         // in trivial scanline order
+         // number of blocks to do just depends on how many actual "pixels" this
+         // component has, independent of interleaved MCU blocking and such
+         int w = (z->img_comp[n].x+7) >> 3;
+         int h = (z->img_comp[n].y+7) >> 3;
+         for (j=0; j < h; ++j) {
+            for (i=0; i < w; ++i) {
+               int ha = z->img_comp[n].ha;
+               if (!stbi__jpeg_decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0;
+               z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*j*8+i*8, z->img_comp[n].w2, data);
+               // every data block is an MCU, so countdown the restart interval
+               if (--z->todo <= 0) {
+                  if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
+                  // if it's NOT a restart, then just bail, so we get corrupt data
+                  // rather than no data
+                  if (!STBI__RESTART(z->marker)) return 1;
+                  stbi__jpeg_reset(z);
+               }
+            }
+         }
+         return 1;
+      } else { // interleaved
+         int i,j,k,x,y;
+         STBI_SIMD_ALIGN(short, data[64]);
+         for (j=0; j < z->img_mcu_y; ++j) {
+            for (i=0; i < z->img_mcu_x; ++i) {
+               // scan an interleaved mcu... process scan_n components in order
+               for (k=0; k < z->scan_n; ++k) {
+                  int n = z->order[k];
+                  // scan out an mcu's worth of this component; that's just determined
+                  // by the basic H and V specified for the component
+                  for (y=0; y < z->img_comp[n].v; ++y) {
+                     for (x=0; x < z->img_comp[n].h; ++x) {
+                        int x2 = (i*z->img_comp[n].h + x)*8;
+                        int y2 = (j*z->img_comp[n].v + y)*8;
+                        int ha = z->img_comp[n].ha;
+                        if (!stbi__jpeg_decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0;
+                        z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*y2+x2, z->img_comp[n].w2, data);
+                     }
+                  }
+               }
+               // after all interleaved components, that's an interleaved MCU,
+               // so now count down the restart interval
+               if (--z->todo <= 0) {
+                  if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
+                  if (!STBI__RESTART(z->marker)) return 1;
+                  stbi__jpeg_reset(z);
+               }
+            }
+         }
+         return 1;
+      }
+   } else {
+      if (z->scan_n == 1) {
+         int i,j;
+         int n = z->order[0];
+         // non-interleaved data, we just need to process one block at a time,
+         // in trivial scanline order
+         // number of blocks to do just depends on how many actual "pixels" this
+         // component has, independent of interleaved MCU blocking and such
+         int w = (z->img_comp[n].x+7) >> 3;
+         int h = (z->img_comp[n].y+7) >> 3;
+         for (j=0; j < h; ++j) {
+            for (i=0; i < w; ++i) {
+               short *data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w);
+               if (z->spec_start == 0) {
+                  if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n))
+                     return 0;
+               } else {
+                  int ha = z->img_comp[n].ha;
+                  if (!stbi__jpeg_decode_block_prog_ac(z, data, &z->huff_ac[ha], z->fast_ac[ha]))
+                     return 0;
+               }
+               // every data block is an MCU, so countdown the restart interval
+               if (--z->todo <= 0) {
+                  if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
+                  if (!STBI__RESTART(z->marker)) return 1;
+                  stbi__jpeg_reset(z);
+               }
+            }
+         }
+         return 1;
+      } else { // interleaved
+         int i,j,k,x,y;
+         for (j=0; j < z->img_mcu_y; ++j) {
+            for (i=0; i < z->img_mcu_x; ++i) {
+               // scan an interleaved mcu... process scan_n components in order
+               for (k=0; k < z->scan_n; ++k) {
+                  int n = z->order[k];
+                  // scan out an mcu's worth of this component; that's just determined
+                  // by the basic H and V specified for the component
+                  for (y=0; y < z->img_comp[n].v; ++y) {
+                     for (x=0; x < z->img_comp[n].h; ++x) {
+                        int x2 = (i*z->img_comp[n].h + x);
+                        int y2 = (j*z->img_comp[n].v + y);
+                        short *data = z->img_comp[n].coeff + 64 * (x2 + y2 * z->img_comp[n].coeff_w);
+                        if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n))
+                           return 0;
+                     }
+                  }
+               }
+               // after all interleaved components, that's an interleaved MCU,
+               // so now count down the restart interval
+               if (--z->todo <= 0) {
+                  if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
+                  if (!STBI__RESTART(z->marker)) return 1;
+                  stbi__jpeg_reset(z);
+               }
+            }
+         }
+         return 1;
+      }
+   }
+}
+
+static void stbi__jpeg_dequantize(short *data, stbi__uint16 *dequant)
+{
+   int i;
+   for (i=0; i < 64; ++i)
+      data[i] *= dequant[i];
+}
+
+static void stbi__jpeg_finish(stbi__jpeg *z)
+{
+   if (z->progressive) {
+      // dequantize and idct the data
+      int i,j,n;
+      for (n=0; n < z->s->img_n; ++n) {
+         int w = (z->img_comp[n].x+7) >> 3;
+         int h = (z->img_comp[n].y+7) >> 3;
+         for (j=0; j < h; ++j) {
+            for (i=0; i < w; ++i) {
+               short *data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w);
+               stbi__jpeg_dequantize(data, z->dequant[z->img_comp[n].tq]);
+               z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*j*8+i*8, z->img_comp[n].w2, data);
+            }
+         }
+      }
+   }
+}
+
+static int stbi__process_marker(stbi__jpeg *z, int m)
+{
+   int L;
+   switch (m) {
+      case STBI__MARKER_none: // no marker found
+         return stbi__err("expected marker","Corrupt JPEG");
+
+      case 0xDD: // DRI - specify restart interval
+         if (stbi__get16be(z->s) != 4) return stbi__err("bad DRI len","Corrupt JPEG");
+         z->restart_interval = stbi__get16be(z->s);
+         return 1;
+
+      case 0xDB: // DQT - define quantization table
+         L = stbi__get16be(z->s)-2;
+         while (L > 0) {
+            int q = stbi__get8(z->s);
+            int p = q >> 4, sixteen = (p != 0);
+            int t = q & 15,i;
+            if (p != 0 && p != 1) return stbi__err("bad DQT type","Corrupt JPEG");
+            if (t > 3) return stbi__err("bad DQT table","Corrupt JPEG");
+
+            for (i=0; i < 64; ++i)
+               z->dequant[t][stbi__jpeg_dezigzag[i]] = (stbi__uint16)(sixteen ? stbi__get16be(z->s) : stbi__get8(z->s));
+            L -= (sixteen ? 129 : 65);
+         }
+         return L==0;
+
+      case 0xC4: // DHT - define huffman table
+         L = stbi__get16be(z->s)-2;
+         while (L > 0) {
+            stbi_uc *v;
+            int sizes[16],i,n=0;
+            int q = stbi__get8(z->s);
+            int tc = q >> 4;
+            int th = q & 15;
+            if (tc > 1 || th > 3) return stbi__err("bad DHT header","Corrupt JPEG");
+            for (i=0; i < 16; ++i) {
+               sizes[i] = stbi__get8(z->s);
+               n += sizes[i];
+            }
+            L -= 17;
+            if (tc == 0) {
+               if (!stbi__build_huffman(z->huff_dc+th, sizes)) return 0;
+               v = z->huff_dc[th].values;
+            } else {
+               if (!stbi__build_huffman(z->huff_ac+th, sizes)) return 0;
+               v = z->huff_ac[th].values;
+            }
+            for (i=0; i < n; ++i)
+               v[i] = stbi__get8(z->s);
+            if (tc != 0)
+               stbi__build_fast_ac(z->fast_ac[th], z->huff_ac + th);
+            L -= n;
+         }
+         return L==0;
+   }
+
+   // check for comment block or APP blocks
+   if ((m >= 0xE0 && m <= 0xEF) || m == 0xFE) {
+      L = stbi__get16be(z->s);
+      if (L < 2) {
+         if (m == 0xFE)
+            return stbi__err("bad COM len","Corrupt JPEG");
+         else
+            return stbi__err("bad APP len","Corrupt JPEG");
+      }
+      L -= 2;
+
+      if (m == 0xE0 && L >= 5) { // JFIF APP0 segment
+         static const unsigned char tag[5] = {'J','F','I','F','\0'};
+         int ok = 1;
+         int i;
+         for (i=0; i < 5; ++i)
+            if (stbi__get8(z->s) != tag[i])
+               ok = 0;
+         L -= 5;
+         if (ok)
+            z->jfif = 1;
+      } else if (m == 0xEE && L >= 12) { // Adobe APP14 segment
+         static const unsigned char tag[6] = {'A','d','o','b','e','\0'};
+         int ok = 1;
+         int i;
+         for (i=0; i < 6; ++i)
+            if (stbi__get8(z->s) != tag[i])
+               ok = 0;
+         L -= 6;
+         if (ok) {
+            stbi__get8(z->s); // version
+            stbi__get16be(z->s); // flags0
+            stbi__get16be(z->s); // flags1
+            z->app14_color_transform = stbi__get8(z->s); // color transform
+            L -= 6;
+         }
+      }
+
+      stbi__skip(z->s, L);
+      return 1;
+   }
+
+   return stbi__err("unknown marker","Corrupt JPEG");
+}
+
+// after we see SOS
+static int stbi__process_scan_header(stbi__jpeg *z)
+{
+   int i;
+   int Ls = stbi__get16be(z->s);
+   z->scan_n = stbi__get8(z->s);
+   if (z->scan_n < 1 || z->scan_n > 4 || z->scan_n > (int) z->s->img_n) return stbi__err("bad SOS component count","Corrupt JPEG");
+   if (Ls != 6+2*z->scan_n) return stbi__err("bad SOS len","Corrupt JPEG");
+   for (i=0; i < z->scan_n; ++i) {
+      int id = stbi__get8(z->s), which;
+      int q = stbi__get8(z->s);
+      for (which = 0; which < z->s->img_n; ++which)
+         if (z->img_comp[which].id == id)
+            break;
+      if (which == z->s->img_n) return 0; // no match
+      z->img_comp[which].hd = q >> 4;   if (z->img_comp[which].hd > 3) return stbi__err("bad DC huff","Corrupt JPEG");
+      z->img_comp[which].ha = q & 15;   if (z->img_comp[which].ha > 3) return stbi__err("bad AC huff","Corrupt JPEG");
+      z->order[i] = which;
+   }
+
+   {
+      int aa;
+      z->spec_start = stbi__get8(z->s);
+      z->spec_end   = stbi__get8(z->s); // should be 63, but might be 0
+      aa = stbi__get8(z->s);
+      z->succ_high = (aa >> 4);
+      z->succ_low  = (aa & 15);
+      if (z->progressive) {
+         if (z->spec_start > 63 || z->spec_end > 63  || z->spec_start > z->spec_end || z->succ_high > 13 || z->succ_low > 13)
+            return stbi__err("bad SOS", "Corrupt JPEG");
+      } else {
+         if (z->spec_start != 0) return stbi__err("bad SOS","Corrupt JPEG");
+         if (z->succ_high != 0 || z->succ_low != 0) return stbi__err("bad SOS","Corrupt JPEG");
+         z->spec_end = 63;
+      }
+   }
+
+   return 1;
+}
+
+static int stbi__free_jpeg_components(stbi__jpeg *z, int ncomp, int why)
+{
+   int i;
+   for (i=0; i < ncomp; ++i) {
+      if (z->img_comp[i].raw_data) {
+         STBI_FREE(z->img_comp[i].raw_data);
+         z->img_comp[i].raw_data = NULL;
+         z->img_comp[i].data = NULL;
+      }
+      if (z->img_comp[i].raw_coeff) {
+         STBI_FREE(z->img_comp[i].raw_coeff);
+         z->img_comp[i].raw_coeff = 0;
+         z->img_comp[i].coeff = 0;
+      }
+      if (z->img_comp[i].linebuf) {
+         STBI_FREE(z->img_comp[i].linebuf);
+         z->img_comp[i].linebuf = NULL;
+      }
+   }
+   return why;
+}
+
+static int stbi__process_frame_header(stbi__jpeg *z, int scan)
+{
+   stbi__context *s = z->s;
+   int Lf,p,i,q, h_max=1,v_max=1,c;
+   Lf = stbi__get16be(s);         if (Lf < 11) return stbi__err("bad SOF len","Corrupt JPEG"); // JPEG
+   p  = stbi__get8(s);            if (p != 8) return stbi__err("only 8-bit","JPEG format not supported: 8-bit only"); // JPEG baseline
+   s->img_y = stbi__get16be(s);   if (s->img_y == 0) return stbi__err("no header height", "JPEG format not supported: delayed height"); // Legal, but we don't handle it--but neither does IJG
+   s->img_x = stbi__get16be(s);   if (s->img_x == 0) return stbi__err("0 width","Corrupt JPEG"); // JPEG requires
+   if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)");
+   if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)");
+   c = stbi__get8(s);
+   if (c != 3 && c != 1 && c != 4) return stbi__err("bad component count","Corrupt JPEG");
+   s->img_n = c;
+   for (i=0; i < c; ++i) {
+      z->img_comp[i].data = NULL;
+      z->img_comp[i].linebuf = NULL;
+   }
+
+   if (Lf != 8+3*s->img_n) return stbi__err("bad SOF len","Corrupt JPEG");
+
+   z->rgb = 0;
+   for (i=0; i < s->img_n; ++i) {
+      static const unsigned char rgb[3] = { 'R', 'G', 'B' };
+      z->img_comp[i].id = stbi__get8(s);
+      if (s->img_n == 3 && z->img_comp[i].id == rgb[i])
+         ++z->rgb;
+      q = stbi__get8(s);
+      z->img_comp[i].h = (q >> 4);  if (!z->img_comp[i].h || z->img_comp[i].h > 4) return stbi__err("bad H","Corrupt JPEG");
+      z->img_comp[i].v = q & 15;    if (!z->img_comp[i].v || z->img_comp[i].v > 4) return stbi__err("bad V","Corrupt JPEG");
+      z->img_comp[i].tq = stbi__get8(s);  if (z->img_comp[i].tq > 3) return stbi__err("bad TQ","Corrupt JPEG");
+   }
+
+   if (scan != STBI__SCAN_load) return 1;
+
+   if (!stbi__mad3sizes_valid(s->img_x, s->img_y, s->img_n, 0)) return stbi__err("too large", "Image too large to decode");
+
+   for (i=0; i < s->img_n; ++i) {
+      if (z->img_comp[i].h > h_max) h_max = z->img_comp[i].h;
+      if (z->img_comp[i].v > v_max) v_max = z->img_comp[i].v;
+   }
+
+   // compute interleaved mcu info
+   z->img_h_max = h_max;
+   z->img_v_max = v_max;
+   z->img_mcu_w = h_max * 8;
+   z->img_mcu_h = v_max * 8;
+   // these sizes can't be more than 17 bits
+   z->img_mcu_x = (s->img_x + z->img_mcu_w-1) / z->img_mcu_w;
+   z->img_mcu_y = (s->img_y + z->img_mcu_h-1) / z->img_mcu_h;
+
+   for (i=0; i < s->img_n; ++i) {
+      // number of effective pixels (e.g. for non-interleaved MCU)
+      z->img_comp[i].x = (s->img_x * z->img_comp[i].h + h_max-1) / h_max;
+      z->img_comp[i].y = (s->img_y * z->img_comp[i].v + v_max-1) / v_max;
+      // to simplify generation, we'll allocate enough memory to decode
+      // the bogus oversized data from using interleaved MCUs and their
+      // big blocks (e.g. a 16x16 iMCU on an image of width 33); we won't
+      // discard the extra data until colorspace conversion
+      //
+      // img_mcu_x, img_mcu_y: <=17 bits; comp[i].h and .v are <=4 (checked earlier)
+      // so these muls can't overflow with 32-bit ints (which we require)
+      z->img_comp[i].w2 = z->img_mcu_x * z->img_comp[i].h * 8;
+      z->img_comp[i].h2 = z->img_mcu_y * z->img_comp[i].v * 8;
+      z->img_comp[i].coeff = 0;
+      z->img_comp[i].raw_coeff = 0;
+      z->img_comp[i].linebuf = NULL;
+      z->img_comp[i].raw_data = stbi__malloc_mad2(z->img_comp[i].w2, z->img_comp[i].h2, 15);
+      if (z->img_comp[i].raw_data == NULL)
+         return stbi__free_jpeg_components(z, i+1, stbi__err("outofmem", "Out of memory"));
+      // align blocks for idct using mmx/sse
+      z->img_comp[i].data = (stbi_uc*) (((size_t) z->img_comp[i].raw_data + 15) & ~15);
+      if (z->progressive) {
+         // w2, h2 are multiples of 8 (see above)
+         z->img_comp[i].coeff_w = z->img_comp[i].w2 / 8;
+         z->img_comp[i].coeff_h = z->img_comp[i].h2 / 8;
+         z->img_comp[i].raw_coeff = stbi__malloc_mad3(z->img_comp[i].w2, z->img_comp[i].h2, sizeof(short), 15);
+         if (z->img_comp[i].raw_coeff == NULL)
+            return stbi__free_jpeg_components(z, i+1, stbi__err("outofmem", "Out of memory"));
+         z->img_comp[i].coeff = (short*) (((size_t) z->img_comp[i].raw_coeff + 15) & ~15);
+      }
+   }
+
+   return 1;
+}
+
+// use comparisons since in some cases we handle more than one case (e.g. SOF)
+#define stbi__DNL(x)         ((x) == 0xdc)
+#define stbi__SOI(x)         ((x) == 0xd8)
+#define stbi__EOI(x)         ((x) == 0xd9)
+#define stbi__SOF(x)         ((x) == 0xc0 || (x) == 0xc1 || (x) == 0xc2)
+#define stbi__SOS(x)         ((x) == 0xda)
+
+#define stbi__SOF_progressive(x)   ((x) == 0xc2)
+
+static int stbi__decode_jpeg_header(stbi__jpeg *z, int scan)
+{
+   int m;
+   z->jfif = 0;
+   z->app14_color_transform = -1; // valid values are 0,1,2
+   z->marker = STBI__MARKER_none; // initialize cached marker to empty
+   m = stbi__get_marker(z);
+   if (!stbi__SOI(m)) return stbi__err("no SOI","Corrupt JPEG");
+   if (scan == STBI__SCAN_type) return 1;
+   m = stbi__get_marker(z);
+   while (!stbi__SOF(m)) {
+      if (!stbi__process_marker(z,m)) return 0;
+      m = stbi__get_marker(z);
+      while (m == STBI__MARKER_none) {
+         // some files have extra padding after their blocks, so ok, we'll scan
+         if (stbi__at_eof(z->s)) return stbi__err("no SOF", "Corrupt JPEG");
+         m = stbi__get_marker(z);
+      }
+   }
+   z->progressive = stbi__SOF_progressive(m);
+   if (!stbi__process_frame_header(z, scan)) return 0;
+   return 1;
+}
+
+// decode image to YCbCr format
+static int stbi__decode_jpeg_image(stbi__jpeg *j)
+{
+   int m;
+   for (m = 0; m < 4; m++) {
+      j->img_comp[m].raw_data = NULL;
+      j->img_comp[m].raw_coeff = NULL;
+   }
+   j->restart_interval = 0;
+   if (!stbi__decode_jpeg_header(j, STBI__SCAN_load)) return 0;
+   m = stbi__get_marker(j);
+   while (!stbi__EOI(m)) {
+      if (stbi__SOS(m)) {
+         if (!stbi__process_scan_header(j)) return 0;
+         if (!stbi__parse_entropy_coded_data(j)) return 0;
+         if (j->marker == STBI__MARKER_none ) {
+            // handle 0s at the end of image data from IP Kamera 9060
+            while (!stbi__at_eof(j->s)) {
+               int x = stbi__get8(j->s);
+               if (x == 255) {
+                  j->marker = stbi__get8(j->s);
+                  break;
+               }
+            }
+            // if we reach eof without hitting a marker, stbi__get_marker() below will fail and we'll eventually return 0
+         }
+      } else if (stbi__DNL(m)) {
+         int Ld = stbi__get16be(j->s);
+         stbi__uint32 NL = stbi__get16be(j->s);
+         if (Ld != 4) return stbi__err("bad DNL len", "Corrupt JPEG");
+         if (NL != j->s->img_y) return stbi__err("bad DNL height", "Corrupt JPEG");
+      } else {
+         if (!stbi__process_marker(j, m)) return 0;
+      }
+      m = stbi__get_marker(j);
+   }
+   if (j->progressive)
+      stbi__jpeg_finish(j);
+   return 1;
+}
+
+// static jfif-centered resampling (across block boundaries)
+
+typedef stbi_uc *(*resample_row_func)(stbi_uc *out, stbi_uc *in0, stbi_uc *in1,
+                                    int w, int hs);
+
+#define stbi__div4(x) ((stbi_uc) ((x) >> 2))
+
+static stbi_uc *resample_row_1(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
+{
+   STBI_NOTUSED(out);
+   STBI_NOTUSED(in_far);
+   STBI_NOTUSED(w);
+   STBI_NOTUSED(hs);
+   return in_near;
+}
+
+static stbi_uc* stbi__resample_row_v_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
+{
+   // need to generate two samples vertically for every one in input
+   int i;
+   STBI_NOTUSED(hs);
+   for (i=0; i < w; ++i)
+      out[i] = stbi__div4(3*in_near[i] + in_far[i] + 2);
+   return out;
+}
+
+static stbi_uc*  stbi__resample_row_h_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
+{
+   // need to generate two samples horizontally for every one in input
+   int i;
+   stbi_uc *input = in_near;
+
+   if (w == 1) {
+      // if only one sample, can't do any interpolation
+      out[0] = out[1] = input[0];
+      return out;
+   }
+
+   out[0] = input[0];
+   out[1] = stbi__div4(input[0]*3 + input[1] + 2);
+   for (i=1; i < w-1; ++i) {
+      int n = 3*input[i]+2;
+      out[i*2+0] = stbi__div4(n+input[i-1]);
+      out[i*2+1] = stbi__div4(n+input[i+1]);
+   }
+   out[i*2+0] = stbi__div4(input[w-2]*3 + input[w-1] + 2);
+   out[i*2+1] = input[w-1];
+
+   STBI_NOTUSED(in_far);
+   STBI_NOTUSED(hs);
+
+   return out;
+}
+
+#define stbi__div16(x) ((stbi_uc) ((x) >> 4))
+
+static stbi_uc *stbi__resample_row_hv_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
+{
+   // need to generate 2x2 samples for every one in input
+   int i,t0,t1;
+   if (w == 1) {
+      out[0] = out[1] = stbi__div4(3*in_near[0] + in_far[0] + 2);
+      return out;
+   }
+
+   t1 = 3*in_near[0] + in_far[0];
+   out[0] = stbi__div4(t1+2);
+   for (i=1; i < w; ++i) {
+      t0 = t1;
+      t1 = 3*in_near[i]+in_far[i];
+      out[i*2-1] = stbi__div16(3*t0 + t1 + 8);
+      out[i*2  ] = stbi__div16(3*t1 + t0 + 8);
+   }
+   out[w*2-1] = stbi__div4(t1+2);
+
+   STBI_NOTUSED(hs);
+
+   return out;
+}
+
+#if defined(STBI_SSE2) || defined(STBI_NEON)
+static stbi_uc *stbi__resample_row_hv_2_simd(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
+{
+   // need to generate 2x2 samples for every one in input
+   int i=0,t0,t1;
+
+   if (w == 1) {
+      out[0] = out[1] = stbi__div4(3*in_near[0] + in_far[0] + 2);
+      return out;
+   }
+
+   t1 = 3*in_near[0] + in_far[0];
+   // process groups of 8 pixels for as long as we can.
+   // note we can't handle the last pixel in a row in this loop
+   // because we need to handle the filter boundary conditions.
+   for (; i < ((w-1) & ~7); i += 8) {
+#if defined(STBI_SSE2)
+      // load and perform the vertical filtering pass
+      // this uses 3*x + y = 4*x + (y - x)
+      __m128i zero  = _mm_setzero_si128();
+      __m128i farb  = _mm_loadl_epi64((__m128i *) (in_far + i));
+      __m128i nearb = _mm_loadl_epi64((__m128i *) (in_near + i));
+      __m128i farw  = _mm_unpacklo_epi8(farb, zero);
+      __m128i nearw = _mm_unpacklo_epi8(nearb, zero);
+      __m128i diff  = _mm_sub_epi16(farw, nearw);
+      __m128i nears = _mm_slli_epi16(nearw, 2);
+      __m128i curr  = _mm_add_epi16(nears, diff); // current row
+
+      // horizontal filter works the same based on shifted vers of current
+      // row. "prev" is current row shifted right by 1 pixel; we need to
+      // insert the previous pixel value (from t1).
+      // "next" is current row shifted left by 1 pixel, with first pixel
+      // of next block of 8 pixels added in.
+      __m128i prv0 = _mm_slli_si128(curr, 2);
+      __m128i nxt0 = _mm_srli_si128(curr, 2);
+      __m128i prev = _mm_insert_epi16(prv0, t1, 0);
+      __m128i next = _mm_insert_epi16(nxt0, 3*in_near[i+8] + in_far[i+8], 7);
+
+      // horizontal filter, polyphase implementation since it's convenient:
+      // even pixels = 3*cur + prev = cur*4 + (prev - cur)
+      // odd  pixels = 3*cur + next = cur*4 + (next - cur)
+      // note the shared term.
+      __m128i bias  = _mm_set1_epi16(8);
+      __m128i curs = _mm_slli_epi16(curr, 2);
+      __m128i prvd = _mm_sub_epi16(prev, curr);
+      __m128i nxtd = _mm_sub_epi16(next, curr);
+      __m128i curb = _mm_add_epi16(curs, bias);
+      __m128i even = _mm_add_epi16(prvd, curb);
+      __m128i odd  = _mm_add_epi16(nxtd, curb);
+
+      // interleave even and odd pixels, then undo scaling.
+      __m128i int0 = _mm_unpacklo_epi16(even, odd);
+      __m128i int1 = _mm_unpackhi_epi16(even, odd);
+      __m128i de0  = _mm_srli_epi16(int0, 4);
+      __m128i de1  = _mm_srli_epi16(int1, 4);
+
+      // pack and write output
+      __m128i outv = _mm_packus_epi16(de0, de1);
+      _mm_storeu_si128((__m128i *) (out + i*2), outv);
+#elif defined(STBI_NEON)
+      // load and perform the vertical filtering pass
+      // this uses 3*x + y = 4*x + (y - x)
+      uint8x8_t farb  = vld1_u8(in_far + i);
+      uint8x8_t nearb = vld1_u8(in_near + i);
+      int16x8_t diff  = vreinterpretq_s16_u16(vsubl_u8(farb, nearb));
+      int16x8_t nears = vreinterpretq_s16_u16(vshll_n_u8(nearb, 2));
+      int16x8_t curr  = vaddq_s16(nears, diff); // current row
+
+      // horizontal filter works the same based on shifted vers of current
+      // row. "prev" is current row shifted right by 1 pixel; we need to
+      // insert the previous pixel value (from t1).
+      // "next" is current row shifted left by 1 pixel, with first pixel
+      // of next block of 8 pixels added in.
+      int16x8_t prv0 = vextq_s16(curr, curr, 7);
+      int16x8_t nxt0 = vextq_s16(curr, curr, 1);
+      int16x8_t prev = vsetq_lane_s16(t1, prv0, 0);
+      int16x8_t next = vsetq_lane_s16(3*in_near[i+8] + in_far[i+8], nxt0, 7);
+
+      // horizontal filter, polyphase implementation since it's convenient:
+      // even pixels = 3*cur + prev = cur*4 + (prev - cur)
+      // odd  pixels = 3*cur + next = cur*4 + (next - cur)
+      // note the shared term.
+      int16x8_t curs = vshlq_n_s16(curr, 2);
+      int16x8_t prvd = vsubq_s16(prev, curr);
+      int16x8_t nxtd = vsubq_s16(next, curr);
+      int16x8_t even = vaddq_s16(curs, prvd);
+      int16x8_t odd  = vaddq_s16(curs, nxtd);
+
+      // undo scaling and round, then store with even/odd phases interleaved
+      uint8x8x2_t o;
+      o.val[0] = vqrshrun_n_s16(even, 4);
+      o.val[1] = vqrshrun_n_s16(odd,  4);
+      vst2_u8(out + i*2, o);
+#endif
+
+      // "previous" value for next iter
+      t1 = 3*in_near[i+7] + in_far[i+7];
+   }
+
+   t0 = t1;
+   t1 = 3*in_near[i] + in_far[i];
+   out[i*2] = stbi__div16(3*t1 + t0 + 8);
+
+   for (++i; i < w; ++i) {
+      t0 = t1;
+      t1 = 3*in_near[i]+in_far[i];
+      out[i*2-1] = stbi__div16(3*t0 + t1 + 8);
+      out[i*2  ] = stbi__div16(3*t1 + t0 + 8);
+   }
+   out[w*2-1] = stbi__div4(t1+2);
+
+   STBI_NOTUSED(hs);
+
+   return out;
+}
+#endif
+
+static stbi_uc *stbi__resample_row_generic(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
+{
+   // resample with nearest-neighbor
+   int i,j;
+   STBI_NOTUSED(in_far);
+   for (i=0; i < w; ++i)
+      for (j=0; j < hs; ++j)
+         out[i*hs+j] = in_near[i];
+   return out;
+}
+
+// this is a reduced-precision calculation of YCbCr-to-RGB introduced
+// to make sure the code produces the same results in both SIMD and scalar
+#define stbi__float2fixed(x)  (((int) ((x) * 4096.0f + 0.5f)) << 8)
+static void stbi__YCbCr_to_RGB_row(stbi_uc *out, const stbi_uc *y, const stbi_uc *pcb, const stbi_uc *pcr, int count, int step)
+{
+   int i;
+   for (i=0; i < count; ++i) {
+      int y_fixed = (y[i] << 20) + (1<<19); // rounding
+      int r,g,b;
+      int cr = pcr[i] - 128;
+      int cb = pcb[i] - 128;
+      r = y_fixed +  cr* stbi__float2fixed(1.40200f);
+      g = y_fixed + (cr*-stbi__float2fixed(0.71414f)) + ((cb*-stbi__float2fixed(0.34414f)) & 0xffff0000);
+      b = y_fixed                                     +   cb* stbi__float2fixed(1.77200f);
+      r >>= 20;
+      g >>= 20;
+      b >>= 20;
+      if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; }
+      if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; }
+      if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; }
+      out[0] = (stbi_uc)r;
+      out[1] = (stbi_uc)g;
+      out[2] = (stbi_uc)b;
+      out[3] = 255;
+      out += step;
+   }
+}
+
+#if defined(STBI_SSE2) || defined(STBI_NEON)
+static void stbi__YCbCr_to_RGB_simd(stbi_uc *out, stbi_uc const *y, stbi_uc const *pcb, stbi_uc const *pcr, int count, int step)
+{
+   int i = 0;
+
+#ifdef STBI_SSE2
+   // step == 3 is pretty ugly on the final interleave, and i'm not convinced
+   // it's useful in practice (you wouldn't use it for textures, for example).
+   // so just accelerate step == 4 case.
+   if (step == 4) {
+      // this is a fairly straightforward implementation and not super-optimized.
+      __m128i signflip  = _mm_set1_epi8(-0x80);
+      __m128i cr_const0 = _mm_set1_epi16(   (short) ( 1.40200f*4096.0f+0.5f));
+      __m128i cr_const1 = _mm_set1_epi16( - (short) ( 0.71414f*4096.0f+0.5f));
+      __m128i cb_const0 = _mm_set1_epi16( - (short) ( 0.34414f*4096.0f+0.5f));
+      __m128i cb_const1 = _mm_set1_epi16(   (short) ( 1.77200f*4096.0f+0.5f));
+      __m128i y_bias = _mm_set1_epi8((char) (unsigned char) 128);
+      __m128i xw = _mm_set1_epi16(255); // alpha channel
+
+      for (; i+7 < count; i += 8) {
+         // load
+         __m128i y_bytes = _mm_loadl_epi64((__m128i *) (y+i));
+         __m128i cr_bytes = _mm_loadl_epi64((__m128i *) (pcr+i));
+         __m128i cb_bytes = _mm_loadl_epi64((__m128i *) (pcb+i));
+         __m128i cr_biased = _mm_xor_si128(cr_bytes, signflip); // -128
+         __m128i cb_biased = _mm_xor_si128(cb_bytes, signflip); // -128
+
+         // unpack to short (and left-shift cr, cb by 8)
+         __m128i yw  = _mm_unpacklo_epi8(y_bias, y_bytes);
+         __m128i crw = _mm_unpacklo_epi8(_mm_setzero_si128(), cr_biased);
+         __m128i cbw = _mm_unpacklo_epi8(_mm_setzero_si128(), cb_biased);
+
+         // color transform
+         __m128i yws = _mm_srli_epi16(yw, 4);
+         __m128i cr0 = _mm_mulhi_epi16(cr_const0, crw);
+         __m128i cb0 = _mm_mulhi_epi16(cb_const0, cbw);
+         __m128i cb1 = _mm_mulhi_epi16(cbw, cb_const1);
+         __m128i cr1 = _mm_mulhi_epi16(crw, cr_const1);
+         __m128i rws = _mm_add_epi16(cr0, yws);
+         __m128i gwt = _mm_add_epi16(cb0, yws);
+         __m128i bws = _mm_add_epi16(yws, cb1);
+         __m128i gws = _mm_add_epi16(gwt, cr1);
+
+         // descale
+         __m128i rw = _mm_srai_epi16(rws, 4);
+         __m128i bw = _mm_srai_epi16(bws, 4);
+         __m128i gw = _mm_srai_epi16(gws, 4);
+
+         // back to byte, set up for transpose
+         __m128i brb = _mm_packus_epi16(rw, bw);
+         __m128i gxb = _mm_packus_epi16(gw, xw);
+
+         // transpose to interleave channels
+         __m128i t0 = _mm_unpacklo_epi8(brb, gxb);
+         __m128i t1 = _mm_unpackhi_epi8(brb, gxb);
+         __m128i o0 = _mm_unpacklo_epi16(t0, t1);
+         __m128i o1 = _mm_unpackhi_epi16(t0, t1);
+
+         // store
+         _mm_storeu_si128((__m128i *) (out + 0), o0);
+         _mm_storeu_si128((__m128i *) (out + 16), o1);
+         out += 32;
+      }
+   }
+#endif
+
+#ifdef STBI_NEON
+   // in this version, step=3 support would be easy to add. but is there demand?
+   if (step == 4) {
+      // this is a fairly straightforward implementation and not super-optimized.
+      uint8x8_t signflip = vdup_n_u8(0x80);
+      int16x8_t cr_const0 = vdupq_n_s16(   (short) ( 1.40200f*4096.0f+0.5f));
+      int16x8_t cr_const1 = vdupq_n_s16( - (short) ( 0.71414f*4096.0f+0.5f));
+      int16x8_t cb_const0 = vdupq_n_s16( - (short) ( 0.34414f*4096.0f+0.5f));
+      int16x8_t cb_const1 = vdupq_n_s16(   (short) ( 1.77200f*4096.0f+0.5f));
+
+      for (; i+7 < count; i += 8) {
+         // load
+         uint8x8_t y_bytes  = vld1_u8(y + i);
+         uint8x8_t cr_bytes = vld1_u8(pcr + i);
+         uint8x8_t cb_bytes = vld1_u8(pcb + i);
+         int8x8_t cr_biased = vreinterpret_s8_u8(vsub_u8(cr_bytes, signflip));
+         int8x8_t cb_biased = vreinterpret_s8_u8(vsub_u8(cb_bytes, signflip));
+
+         // expand to s16
+         int16x8_t yws = vreinterpretq_s16_u16(vshll_n_u8(y_bytes, 4));
+         int16x8_t crw = vshll_n_s8(cr_biased, 7);
+         int16x8_t cbw = vshll_n_s8(cb_biased, 7);
+
+         // color transform
+         int16x8_t cr0 = vqdmulhq_s16(crw, cr_const0);
+         int16x8_t cb0 = vqdmulhq_s16(cbw, cb_const0);
+         int16x8_t cr1 = vqdmulhq_s16(crw, cr_const1);
+         int16x8_t cb1 = vqdmulhq_s16(cbw, cb_const1);
+         int16x8_t rws = vaddq_s16(yws, cr0);
+         int16x8_t gws = vaddq_s16(vaddq_s16(yws, cb0), cr1);
+         int16x8_t bws = vaddq_s16(yws, cb1);
+
+         // undo scaling, round, convert to byte
+         uint8x8x4_t o;
+         o.val[0] = vqrshrun_n_s16(rws, 4);
+         o.val[1] = vqrshrun_n_s16(gws, 4);
+         o.val[2] = vqrshrun_n_s16(bws, 4);
+         o.val[3] = vdup_n_u8(255);
+
+         // store, interleaving r/g/b/a
+         vst4_u8(out, o);
+         out += 8*4;
+      }
+   }
+#endif
+
+   for (; i < count; ++i) {
+      int y_fixed = (y[i] << 20) + (1<<19); // rounding
+      int r,g,b;
+      int cr = pcr[i] - 128;
+      int cb = pcb[i] - 128;
+      r = y_fixed + cr* stbi__float2fixed(1.40200f);
+      g = y_fixed + cr*-stbi__float2fixed(0.71414f) + ((cb*-stbi__float2fixed(0.34414f)) & 0xffff0000);
+      b = y_fixed                                   +   cb* stbi__float2fixed(1.77200f);
+      r >>= 20;
+      g >>= 20;
+      b >>= 20;
+      if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; }
+      if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; }
+      if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; }
+      out[0] = (stbi_uc)r;
+      out[1] = (stbi_uc)g;
+      out[2] = (stbi_uc)b;
+      out[3] = 255;
+      out += step;
+   }
+}
+#endif
+
+// set up the kernels
+static void stbi__setup_jpeg(stbi__jpeg *j)
+{
+   j->idct_block_kernel = stbi__idct_block;
+   j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_row;
+   j->resample_row_hv_2_kernel = stbi__resample_row_hv_2;
+
+#ifdef STBI_SSE2
+   if (stbi__sse2_available()) {
+      j->idct_block_kernel = stbi__idct_simd;
+      j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd;
+      j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd;
+   }
+#endif
+
+#ifdef STBI_NEON
+   j->idct_block_kernel = stbi__idct_simd;
+   j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd;
+   j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd;
+#endif
+}
+
+// clean up the temporary component buffers
+static void stbi__cleanup_jpeg(stbi__jpeg *j)
+{
+   stbi__free_jpeg_components(j, j->s->img_n, 0);
+}
+
+typedef struct
+{
+   resample_row_func resample;
+   stbi_uc *line0,*line1;
+   int hs,vs;   // expansion factor in each axis
+   int w_lores; // horizontal pixels pre-expansion
+   int ystep;   // how far through vertical expansion we are
+   int ypos;    // which pre-expansion row we're on
+} stbi__resample;
+
+// fast 0..255 * 0..255 => 0..255 rounded multiplication
+static stbi_uc stbi__blinn_8x8(stbi_uc x, stbi_uc y)
+{
+   unsigned int t = x*y + 128;
+   return (stbi_uc) ((t + (t >>8)) >> 8);
+}
+
+static stbi_uc *load_jpeg_image(stbi__jpeg *z, int *out_x, int *out_y, int *comp, int req_comp)
+{
+   int n, decode_n, is_rgb;
+   z->s->img_n = 0; // make stbi__cleanup_jpeg safe
+
+   // validate req_comp
+   if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error");
+
+   // load a jpeg image from whichever source, but leave in YCbCr format
+   if (!stbi__decode_jpeg_image(z)) { stbi__cleanup_jpeg(z); return NULL; }
+
+   // determine actual number of components to generate
+   n = req_comp ? req_comp : z->s->img_n >= 3 ? 3 : 1;
+
+   is_rgb = z->s->img_n == 3 && (z->rgb == 3 || (z->app14_color_transform == 0 && !z->jfif));
+
+   if (z->s->img_n == 3 && n < 3 && !is_rgb)
+      decode_n = 1;
+   else
+      decode_n = z->s->img_n;
+
+   // resample and color-convert
+   {
+      int k;
+      unsigned int i,j;
+      stbi_uc *output;
+      stbi_uc *coutput[4] = { NULL, NULL, NULL, NULL };
+
+      stbi__resample res_comp[4];
+
+      for (k=0; k < decode_n; ++k) {
+         stbi__resample *r = &res_comp[k];
+
+         // allocate line buffer big enough for upsampling off the edges
+         // with upsample factor of 4
+         z->img_comp[k].linebuf = (stbi_uc *) stbi__malloc(z->s->img_x + 3);
+         if (!z->img_comp[k].linebuf) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); }
+
+         r->hs      = z->img_h_max / z->img_comp[k].h;
+         r->vs      = z->img_v_max / z->img_comp[k].v;
+         r->ystep   = r->vs >> 1;
+         r->w_lores = (z->s->img_x + r->hs-1) / r->hs;
+         r->ypos    = 0;
+         r->line0   = r->line1 = z->img_comp[k].data;
+
+         if      (r->hs == 1 && r->vs == 1) r->resample = resample_row_1;
+         else if (r->hs == 1 && r->vs == 2) r->resample = stbi__resample_row_v_2;
+         else if (r->hs == 2 && r->vs == 1) r->resample = stbi__resample_row_h_2;
+         else if (r->hs == 2 && r->vs == 2) r->resample = z->resample_row_hv_2_kernel;
+         else                               r->resample = stbi__resample_row_generic;
+      }
+
+      // can't error after this so, this is safe
+      output = (stbi_uc *) stbi__malloc_mad3(n, z->s->img_x, z->s->img_y, 1);
+      if (!output) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); }
+
+      // now go ahead and resample
+      for (j=0; j < z->s->img_y; ++j) {
+         stbi_uc *out = output + n * z->s->img_x * j;
+         for (k=0; k < decode_n; ++k) {
+            stbi__resample *r = &res_comp[k];
+            int y_bot = r->ystep >= (r->vs >> 1);
+            coutput[k] = r->resample(z->img_comp[k].linebuf,
+                                     y_bot ? r->line1 : r->line0,
+                                     y_bot ? r->line0 : r->line1,
+                                     r->w_lores, r->hs);
+            if (++r->ystep >= r->vs) {
+               r->ystep = 0;
+               r->line0 = r->line1;
+               if (++r->ypos < z->img_comp[k].y)
+                  r->line1 += z->img_comp[k].w2;
+            }
+         }
+         if (n >= 3) {
+            stbi_uc *y = coutput[0];
+            if (z->s->img_n == 3) {
+               if (is_rgb) {
+                  for (i=0; i < z->s->img_x; ++i) {
+                     out[0] = y[i];
+                     out[1] = coutput[1][i];
+                     out[2] = coutput[2][i];
+                     out[3] = 255;
+                     out += n;
+                  }
+               } else {
+                  z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n);
+               }
+            } else if (z->s->img_n == 4) {
+               if (z->app14_color_transform == 0) { // CMYK
+                  for (i=0; i < z->s->img_x; ++i) {
+                     stbi_uc m = coutput[3][i];
+                     out[0] = stbi__blinn_8x8(coutput[0][i], m);
+                     out[1] = stbi__blinn_8x8(coutput[1][i], m);
+                     out[2] = stbi__blinn_8x8(coutput[2][i], m);
+                     out[3] = 255;
+                     out += n;
+                  }
+               } else if (z->app14_color_transform == 2) { // YCCK
+                  z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n);
+                  for (i=0; i < z->s->img_x; ++i) {
+                     stbi_uc m = coutput[3][i];
+                     out[0] = stbi__blinn_8x8(255 - out[0], m);
+                     out[1] = stbi__blinn_8x8(255 - out[1], m);
+                     out[2] = stbi__blinn_8x8(255 - out[2], m);
+                     out += n;
+                  }
+               } else { // YCbCr + alpha?  Ignore the fourth channel for now
+                  z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n);
+               }
+            } else
+               for (i=0; i < z->s->img_x; ++i) {
+                  out[0] = out[1] = out[2] = y[i];
+                  out[3] = 255; // not used if n==3
+                  out += n;
+               }
+         } else {
+            if (is_rgb) {
+               if (n == 1)
+                  for (i=0; i < z->s->img_x; ++i)
+                     *out++ = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]);
+               else {
+                  for (i=0; i < z->s->img_x; ++i, out += 2) {
+                     out[0] = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]);
+                     out[1] = 255;
+                  }
+               }
+            } else if (z->s->img_n == 4 && z->app14_color_transform == 0) {
+               for (i=0; i < z->s->img_x; ++i) {
+                  stbi_uc m = coutput[3][i];
+                  stbi_uc r = stbi__blinn_8x8(coutput[0][i], m);
+                  stbi_uc g = stbi__blinn_8x8(coutput[1][i], m);
+                  stbi_uc b = stbi__blinn_8x8(coutput[2][i], m);
+                  out[0] = stbi__compute_y(r, g, b);
+                  out[1] = 255;
+                  out += n;
+               }
+            } else if (z->s->img_n == 4 && z->app14_color_transform == 2) {
+               for (i=0; i < z->s->img_x; ++i) {
+                  out[0] = stbi__blinn_8x8(255 - coutput[0][i], coutput[3][i]);
+                  out[1] = 255;
+                  out += n;
+               }
+            } else {
+               stbi_uc *y = coutput[0];
+               if (n == 1)
+                  for (i=0; i < z->s->img_x; ++i) out[i] = y[i];
+               else
+                  for (i=0; i < z->s->img_x; ++i) { *out++ = y[i]; *out++ = 255; }
+            }
+         }
+      }
+      stbi__cleanup_jpeg(z);
+      *out_x = z->s->img_x;
+      *out_y = z->s->img_y;
+      if (comp) *comp = z->s->img_n >= 3 ? 3 : 1; // report original components, not output
+      return output;
+   }
+}
+
+static void *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
+{
+   unsigned char* result;
+   stbi__jpeg* j = (stbi__jpeg*) stbi__malloc(sizeof(stbi__jpeg));
+   STBI_NOTUSED(ri);
+   j->s = s;
+   stbi__setup_jpeg(j);
+   result = load_jpeg_image(j, x,y,comp,req_comp);
+   STBI_FREE(j);
+   return result;
+}
+
+static int stbi__jpeg_test(stbi__context *s)
+{
+   int r;
+   stbi__jpeg* j = (stbi__jpeg*)stbi__malloc(sizeof(stbi__jpeg));
+   j->s = s;
+   stbi__setup_jpeg(j);
+   r = stbi__decode_jpeg_header(j, STBI__SCAN_type);
+   stbi__rewind(s);
+   STBI_FREE(j);
+   return r;
+}
+
+static int stbi__jpeg_info_raw(stbi__jpeg *j, int *x, int *y, int *comp)
+{
+   if (!stbi__decode_jpeg_header(j, STBI__SCAN_header)) {
+      stbi__rewind( j->s );
+      return 0;
+   }
+   if (x) *x = j->s->img_x;
+   if (y) *y = j->s->img_y;
+   if (comp) *comp = j->s->img_n >= 3 ? 3 : 1;
+   return 1;
+}
+
+static int stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp)
+{
+   int result;
+   stbi__jpeg* j = (stbi__jpeg*) (stbi__malloc(sizeof(stbi__jpeg)));
+   j->s = s;
+   result = stbi__jpeg_info_raw(j, x, y, comp);
+   STBI_FREE(j);
+   return result;
+}
+#endif
+
+// public domain zlib decode    v0.2  Sean Barrett 2006-11-18
+//    simple implementation
+//      - all input must be provided in an upfront buffer
+//      - all output is written to a single output buffer (can malloc/realloc)
+//    performance
+//      - fast huffman
+
+#ifndef STBI_NO_ZLIB
+
+// fast-way is faster to check than jpeg huffman, but slow way is slower
+#define STBI__ZFAST_BITS  9 // accelerate all cases in default tables
+#define STBI__ZFAST_MASK  ((1 << STBI__ZFAST_BITS) - 1)
+
+// zlib-style huffman encoding
+// (jpegs packs from left, zlib from right, so can't share code)
+typedef struct
+{
+   stbi__uint16 fast[1 << STBI__ZFAST_BITS];
+   stbi__uint16 firstcode[16];
+   int maxcode[17];
+   stbi__uint16 firstsymbol[16];
+   stbi_uc  size[288];
+   stbi__uint16 value[288];
+} stbi__zhuffman;
+
+stbi_inline static int stbi__bitreverse16(int n)
+{
+  n = ((n & 0xAAAA) >>  1) | ((n & 0x5555) << 1);
+  n = ((n & 0xCCCC) >>  2) | ((n & 0x3333) << 2);
+  n = ((n & 0xF0F0) >>  4) | ((n & 0x0F0F) << 4);
+  n = ((n & 0xFF00) >>  8) | ((n & 0x00FF) << 8);
+  return n;
+}
+
+stbi_inline static int stbi__bit_reverse(int v, int bits)
+{
+   STBI_ASSERT(bits <= 16);
+   // to bit reverse n bits, reverse 16 and shift
+   // e.g. 11 bits, bit reverse and shift away 5
+   return stbi__bitreverse16(v) >> (16-bits);
+}
+
+static int stbi__zbuild_huffman(stbi__zhuffman *z, const stbi_uc *sizelist, int num)
+{
+   int i,k=0;
+   int code, next_code[16], sizes[17];
+
+   // DEFLATE spec for generating codes
+   memset(sizes, 0, sizeof(sizes));
+   memset(z->fast, 0, sizeof(z->fast));
+   for (i=0; i < num; ++i)
+      ++sizes[sizelist[i]];
+   sizes[0] = 0;
+   for (i=1; i < 16; ++i)
+      if (sizes[i] > (1 << i))
+         return stbi__err("bad sizes", "Corrupt PNG");
+   code = 0;
+   for (i=1; i < 16; ++i) {
+      next_code[i] = code;
+      z->firstcode[i] = (stbi__uint16) code;
+      z->firstsymbol[i] = (stbi__uint16) k;
+      code = (code + sizes[i]);
+      if (sizes[i])
+         if (code-1 >= (1 << i)) return stbi__err("bad codelengths","Corrupt PNG");
+      z->maxcode[i] = code << (16-i); // preshift for inner loop
+      code <<= 1;
+      k += sizes[i];
+   }
+   z->maxcode[16] = 0x10000; // sentinel
+   for (i=0; i < num; ++i) {
+      int s = sizelist[i];
+      if (s) {
+         int c = next_code[s] - z->firstcode[s] + z->firstsymbol[s];
+         stbi__uint16 fastv = (stbi__uint16) ((s << 9) | i);
+         z->size [c] = (stbi_uc     ) s;
+         z->value[c] = (stbi__uint16) i;
+         if (s <= STBI__ZFAST_BITS) {
+            int j = stbi__bit_reverse(next_code[s],s);
+            while (j < (1 << STBI__ZFAST_BITS)) {
+               z->fast[j] = fastv;
+               j += (1 << s);
+            }
+         }
+         ++next_code[s];
+      }
+   }
+   return 1;
+}
+
+// zlib-from-memory implementation for PNG reading
+//    because PNG allows splitting the zlib stream arbitrarily,
+//    and it's annoying structurally to have PNG call ZLIB call PNG,
+//    we require PNG read all the IDATs and combine them into a single
+//    memory buffer
+
+typedef struct
+{
+   stbi_uc *zbuffer, *zbuffer_end;
+   int num_bits;
+   stbi__uint32 code_buffer;
+
+   char *zout;
+   char *zout_start;
+   char *zout_end;
+   int   z_expandable;
+
+   stbi__zhuffman z_length, z_distance;
+} stbi__zbuf;
+
+stbi_inline static int stbi__zeof(stbi__zbuf *z)
+{
+   return (z->zbuffer >= z->zbuffer_end);
+}
+
+stbi_inline static stbi_uc stbi__zget8(stbi__zbuf *z)
+{
+   return stbi__zeof(z) ? 0 : *z->zbuffer++;
+}
+
+static void stbi__fill_bits(stbi__zbuf *z)
+{
+   do {
+      if (z->code_buffer >= (1U << z->num_bits)) {
+        z->zbuffer = z->zbuffer_end;  /* treat this as EOF so we fail. */
+        return;
+      }
+      z->code_buffer |= (unsigned int) stbi__zget8(z) << z->num_bits;
+      z->num_bits += 8;
+   } while (z->num_bits <= 24);
+}
+
+stbi_inline static unsigned int stbi__zreceive(stbi__zbuf *z, int n)
+{
+   unsigned int k;
+   if (z->num_bits < n) stbi__fill_bits(z);
+   k = z->code_buffer & ((1 << n) - 1);
+   z->code_buffer >>= n;
+   z->num_bits -= n;
+   return k;
+}
+
+static int stbi__zhuffman_decode_slowpath(stbi__zbuf *a, stbi__zhuffman *z)
+{
+   int b,s,k;
+   // not resolved by fast table, so compute it the slow way
+   // use jpeg approach, which requires MSbits at top
+   k = stbi__bit_reverse(a->code_buffer, 16);
+   for (s=STBI__ZFAST_BITS+1; ; ++s)
+      if (k < z->maxcode[s])
+         break;
+   if (s >= 16) return -1; // invalid code!
+   // code size is s, so:
+   b = (k >> (16-s)) - z->firstcode[s] + z->firstsymbol[s];
+   if (b >= (int) sizeof (z->size)) return -1; // some data was corrupt somewhere!
+   if (z->size[b] != s) return -1;  // was originally an assert, but report failure instead.
+   a->code_buffer >>= s;
+   a->num_bits -= s;
+   return z->value[b];
+}
+
+stbi_inline static int stbi__zhuffman_decode(stbi__zbuf *a, stbi__zhuffman *z)
+{
+   int b,s;
+   if (a->num_bits < 16) {
+      if (stbi__zeof(a)) {
+         return -1;   /* report error for unexpected end of data. */
+      }
+      stbi__fill_bits(a);
+   }
+   b = z->fast[a->code_buffer & STBI__ZFAST_MASK];
+   if (b) {
+      s = b >> 9;
+      a->code_buffer >>= s;
+      a->num_bits -= s;
+      return b & 511;
+   }
+   return stbi__zhuffman_decode_slowpath(a, z);
+}
+
+static int stbi__zexpand(stbi__zbuf *z, char *zout, int n)  // need to make room for n bytes
+{
+   char *q;
+   unsigned int cur, limit, old_limit;
+   z->zout = zout;
+   if (!z->z_expandable) return stbi__err("output buffer limit","Corrupt PNG");
+   cur   = (unsigned int) (z->zout - z->zout_start);
+   limit = old_limit = (unsigned) (z->zout_end - z->zout_start);
+   if (UINT_MAX - cur < (unsigned) n) return stbi__err("outofmem", "Out of memory");
+   while (cur + n > limit) {
+      if(limit > UINT_MAX / 2) return stbi__err("outofmem", "Out of memory");
+      limit *= 2;
+   }
+   q = (char *) STBI_REALLOC_SIZED(z->zout_start, old_limit, limit);
+   STBI_NOTUSED(old_limit);
+   if (q == NULL) return stbi__err("outofmem", "Out of memory");
+   z->zout_start = q;
+   z->zout       = q + cur;
+   z->zout_end   = q + limit;
+   return 1;
+}
+
+static const int stbi__zlength_base[31] = {
+   3,4,5,6,7,8,9,10,11,13,
+   15,17,19,23,27,31,35,43,51,59,
+   67,83,99,115,131,163,195,227,258,0,0 };
+
+static const int stbi__zlength_extra[31]=
+{ 0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0 };
+
+static const int stbi__zdist_base[32] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193,
+257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577,0,0};
+
+static const int stbi__zdist_extra[32] =
+{ 0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13};
+
+static int stbi__parse_huffman_block(stbi__zbuf *a)
+{
+   char *zout = a->zout;
+   for(;;) {
+      int z = stbi__zhuffman_decode(a, &a->z_length);
+      if (z < 256) {
+         if (z < 0) return stbi__err("bad huffman code","Corrupt PNG"); // error in huffman codes
+         if (zout >= a->zout_end) {
+            if (!stbi__zexpand(a, zout, 1)) return 0;
+            zout = a->zout;
+         }
+         *zout++ = (char) z;
+      } else {
+         stbi_uc *p;
+         int len,dist;
+         if (z == 256) {
+            a->zout = zout;
+            return 1;
+         }
+         z -= 257;
+         len = stbi__zlength_base[z];
+         if (stbi__zlength_extra[z]) len += stbi__zreceive(a, stbi__zlength_extra[z]);
+         z = stbi__zhuffman_decode(a, &a->z_distance);
+         if (z < 0) return stbi__err("bad huffman code","Corrupt PNG");
+         dist = stbi__zdist_base[z];
+         if (stbi__zdist_extra[z]) dist += stbi__zreceive(a, stbi__zdist_extra[z]);
+         if (zout - a->zout_start < dist) return stbi__err("bad dist","Corrupt PNG");
+         if (zout + len > a->zout_end) {
+            if (!stbi__zexpand(a, zout, len)) return 0;
+            zout = a->zout;
+         }
+         p = (stbi_uc *) (zout - dist);
+         if (dist == 1) { // run of one byte; common in images.
+            stbi_uc v = *p;
+            if (len) { do *zout++ = v; while (--len); }
+         } else {
+            if (len) { do *zout++ = *p++; while (--len); }
+         }
+      }
+   }
+}
+
+static int stbi__compute_huffman_codes(stbi__zbuf *a)
+{
+   static const stbi_uc length_dezigzag[19] = { 16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15 };
+   stbi__zhuffman z_codelength;
+   stbi_uc lencodes[286+32+137];//padding for maximum single op
+   stbi_uc codelength_sizes[19];
+   int i,n;
+
+   int hlit  = stbi__zreceive(a,5) + 257;
+   int hdist = stbi__zreceive(a,5) + 1;
+   int hclen = stbi__zreceive(a,4) + 4;
+   int ntot  = hlit + hdist;
+
+   memset(codelength_sizes, 0, sizeof(codelength_sizes));
+   for (i=0; i < hclen; ++i) {
+      int s = stbi__zreceive(a,3);
+      codelength_sizes[length_dezigzag[i]] = (stbi_uc) s;
+   }
+   if (!stbi__zbuild_huffman(&z_codelength, codelength_sizes, 19)) return 0;
+
+   n = 0;
+   while (n < ntot) {
+      int c = stbi__zhuffman_decode(a, &z_codelength);
+      if (c < 0 || c >= 19) return stbi__err("bad codelengths", "Corrupt PNG");
+      if (c < 16)
+         lencodes[n++] = (stbi_uc) c;
+      else {
+         stbi_uc fill = 0;
+         if (c == 16) {
+            c = stbi__zreceive(a,2)+3;
+            if (n == 0) return stbi__err("bad codelengths", "Corrupt PNG");
+            fill = lencodes[n-1];
+         } else if (c == 17) {
+            c = stbi__zreceive(a,3)+3;
+         } else if (c == 18) {
+            c = stbi__zreceive(a,7)+11;
+         } else {
+            return stbi__err("bad codelengths", "Corrupt PNG");
+         }
+         if (ntot - n < c) return stbi__err("bad codelengths", "Corrupt PNG");
+         memset(lencodes+n, fill, c);
+         n += c;
+      }
+   }
+   if (n != ntot) return stbi__err("bad codelengths","Corrupt PNG");
+   if (!stbi__zbuild_huffman(&a->z_length, lencodes, hlit)) return 0;
+   if (!stbi__zbuild_huffman(&a->z_distance, lencodes+hlit, hdist)) return 0;
+   return 1;
+}
+
+static int stbi__parse_uncompressed_block(stbi__zbuf *a)
+{
+   stbi_uc header[4];
+   int len,nlen,k;
+   if (a->num_bits & 7)
+      stbi__zreceive(a, a->num_bits & 7); // discard
+   // drain the bit-packed data into header
+   k = 0;
+   while (a->num_bits > 0) {
+      header[k++] = (stbi_uc) (a->code_buffer & 255); // suppress MSVC run-time check
+      a->code_buffer >>= 8;
+      a->num_bits -= 8;
+   }
+   if (a->num_bits < 0) return stbi__err("zlib corrupt","Corrupt PNG");
+   // now fill header the normal way
+   while (k < 4)
+      header[k++] = stbi__zget8(a);
+   len  = header[1] * 256 + header[0];
+   nlen = header[3] * 256 + header[2];
+   if (nlen != (len ^ 0xffff)) return stbi__err("zlib corrupt","Corrupt PNG");
+   if (a->zbuffer + len > a->zbuffer_end) return stbi__err("read past buffer","Corrupt PNG");
+   if (a->zout + len > a->zout_end)
+      if (!stbi__zexpand(a, a->zout, len)) return 0;
+   memcpy(a->zout, a->zbuffer, len);
+   a->zbuffer += len;
+   a->zout += len;
+   return 1;
+}
+
+static int stbi__parse_zlib_header(stbi__zbuf *a)
+{
+   int cmf   = stbi__zget8(a);
+   int cm    = cmf & 15;
+   /* int cinfo = cmf >> 4; */
+   int flg   = stbi__zget8(a);
+   if (stbi__zeof(a)) return stbi__err("bad zlib header","Corrupt PNG"); // zlib spec
+   if ((cmf*256+flg) % 31 != 0) return stbi__err("bad zlib header","Corrupt PNG"); // zlib spec
+   if (flg & 32) return stbi__err("no preset dict","Corrupt PNG"); // preset dictionary not allowed in png
+   if (cm != 8) return stbi__err("bad compression","Corrupt PNG"); // DEFLATE required for png
+   // window = 1 << (8 + cinfo)... but who cares, we fully buffer output
+   return 1;
+}
+
+static const stbi_uc stbi__zdefault_length[288] =
+{
+   8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+   8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+   8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+   8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+   8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
+   9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
+   9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
+   9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
+   7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8
+};
+static const stbi_uc stbi__zdefault_distance[32] =
+{
+   5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5
+};
+/*
+Init algorithm:
+{
+   int i;   // use <= to match clearly with spec
+   for (i=0; i <= 143; ++i)     stbi__zdefault_length[i]   = 8;
+   for (   ; i <= 255; ++i)     stbi__zdefault_length[i]   = 9;
+   for (   ; i <= 279; ++i)     stbi__zdefault_length[i]   = 7;
+   for (   ; i <= 287; ++i)     stbi__zdefault_length[i]   = 8;
+
+   for (i=0; i <=  31; ++i)     stbi__zdefault_distance[i] = 5;
+}
+*/
+
+static int stbi__parse_zlib(stbi__zbuf *a, int parse_header)
+{
+   int final, type;
+   if (parse_header)
+      if (!stbi__parse_zlib_header(a)) return 0;
+   a->num_bits = 0;
+   a->code_buffer = 0;
+   do {
+      final = stbi__zreceive(a,1);
+      type = stbi__zreceive(a,2);
+      if (type == 0) {
+         if (!stbi__parse_uncompressed_block(a)) return 0;
+      } else if (type == 3) {
+         return 0;
+      } else {
+         if (type == 1) {
+            // use fixed code lengths
+            if (!stbi__zbuild_huffman(&a->z_length  , stbi__zdefault_length  , 288)) return 0;
+            if (!stbi__zbuild_huffman(&a->z_distance, stbi__zdefault_distance,  32)) return 0;
+         } else {
+            if (!stbi__compute_huffman_codes(a)) return 0;
+         }
+         if (!stbi__parse_huffman_block(a)) return 0;
+      }
+   } while (!final);
+   return 1;
+}
+
+static int stbi__do_zlib(stbi__zbuf *a, char *obuf, int olen, int exp, int parse_header)
+{
+   a->zout_start = obuf;
+   a->zout       = obuf;
+   a->zout_end   = obuf + olen;
+   a->z_expandable = exp;
+
+   return stbi__parse_zlib(a, parse_header);
+}
+
+STBIDEF char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen)
+{
+   stbi__zbuf a;
+   char *p = (char *) stbi__malloc(initial_size);
+   if (p == NULL) return NULL;
+   a.zbuffer = (stbi_uc *) buffer;
+   a.zbuffer_end = (stbi_uc *) buffer + len;
+   if (stbi__do_zlib(&a, p, initial_size, 1, 1)) {
+      if (outlen) *outlen = (int) (a.zout - a.zout_start);
+      return a.zout_start;
+   } else {
+      STBI_FREE(a.zout_start);
+      return NULL;
+   }
+}
+
+STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
+{
+   return stbi_zlib_decode_malloc_guesssize(buffer, len, 16384, outlen);
+}
+
+STBIDEF char *stbi_zlib_decode_malloc_guesssize_headerflag(const char *buffer, int len, int initial_size, int *outlen, int parse_header)
+{
+   stbi__zbuf a;
+   char *p = (char *) stbi__malloc(initial_size);
+   if (p == NULL) return NULL;
+   a.zbuffer = (stbi_uc *) buffer;
+   a.zbuffer_end = (stbi_uc *) buffer + len;
+   if (stbi__do_zlib(&a, p, initial_size, 1, parse_header)) {
+      if (outlen) *outlen = (int) (a.zout - a.zout_start);
+      return a.zout_start;
+   } else {
+      STBI_FREE(a.zout_start);
+      return NULL;
+   }
+}
+
+STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
+{
+   stbi__zbuf a;
+   a.zbuffer = (stbi_uc *) ibuffer;
+   a.zbuffer_end = (stbi_uc *) ibuffer + ilen;
+   if (stbi__do_zlib(&a, obuffer, olen, 0, 1))
+      return (int) (a.zout - a.zout_start);
+   else
+      return -1;
+}
+
+STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
+{
+   stbi__zbuf a;
+   char *p = (char *) stbi__malloc(16384);
+   if (p == NULL) return NULL;
+   a.zbuffer = (stbi_uc *) buffer;
+   a.zbuffer_end = (stbi_uc *) buffer+len;
+   if (stbi__do_zlib(&a, p, 16384, 1, 0)) {
+      if (outlen) *outlen = (int) (a.zout - a.zout_start);
+      return a.zout_start;
+   } else {
+      STBI_FREE(a.zout_start);
+      return NULL;
+   }
+}
+
+STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
+{
+   stbi__zbuf a;
+   a.zbuffer = (stbi_uc *) ibuffer;
+   a.zbuffer_end = (stbi_uc *) ibuffer + ilen;
+   if (stbi__do_zlib(&a, obuffer, olen, 0, 0))
+      return (int) (a.zout - a.zout_start);
+   else
+      return -1;
+}
+#endif
+
+// public domain "baseline" PNG decoder   v0.10  Sean Barrett 2006-11-18
+//    simple implementation
+//      - only 8-bit samples
+//      - no CRC checking
+//      - allocates lots of intermediate memory
+//        - avoids problem of streaming data between subsystems
+//        - avoids explicit window management
+//    performance
+//      - uses stb_zlib, a PD zlib implementation with fast huffman decoding
+
+#ifndef STBI_NO_PNG
+typedef struct
+{
+   stbi__uint32 length;
+   stbi__uint32 type;
+} stbi__pngchunk;
+
+static stbi__pngchunk stbi__get_chunk_header(stbi__context *s)
+{
+   stbi__pngchunk c;
+   c.length = stbi__get32be(s);
+   c.type   = stbi__get32be(s);
+   return c;
+}
+
+static int stbi__check_png_header(stbi__context *s)
+{
+   static const stbi_uc png_sig[8] = { 137,80,78,71,13,10,26,10 };
+   int i;
+   for (i=0; i < 8; ++i)
+      if (stbi__get8(s) != png_sig[i]) return stbi__err("bad png sig","Not a PNG");
+   return 1;
+}
+
+typedef struct
+{
+   stbi__context *s;
+   stbi_uc *idata, *expanded, *out;
+   int depth;
+} stbi__png;
+
+
+enum {
+   STBI__F_none=0,
+   STBI__F_sub=1,
+   STBI__F_up=2,
+   STBI__F_avg=3,
+   STBI__F_paeth=4,
+   // synthetic filters used for first scanline to avoid needing a dummy row of 0s
+   STBI__F_avg_first,
+   STBI__F_paeth_first
+};
+
+static stbi_uc first_row_filter[5] =
+{
+   STBI__F_none,
+   STBI__F_sub,
+   STBI__F_none,
+   STBI__F_avg_first,
+   STBI__F_paeth_first
+};
+
+static int stbi__paeth(int a, int b, int c)
+{
+   int p = a + b - c;
+   int pa = abs(p-a);
+   int pb = abs(p-b);
+   int pc = abs(p-c);
+   if (pa <= pb && pa <= pc) return a;
+   if (pb <= pc) return b;
+   return c;
+}
+
+static const stbi_uc stbi__depth_scale_table[9] = { 0, 0xff, 0x55, 0, 0x11, 0,0,0, 0x01 };
+
+// create the png data from post-deflated data
+static int stbi__create_png_image_raw(stbi__png *a, stbi_uc *raw, stbi__uint32 raw_len, int out_n, stbi__uint32 x, stbi__uint32 y, int depth, int color)
+{
+   int bytes = (depth == 16? 2 : 1);
+   stbi__context *s = a->s;
+   stbi__uint32 i,j,stride = x*out_n*bytes;
+   stbi__uint32 img_len, img_width_bytes;
+   int k;
+   int img_n = s->img_n; // copy it into a local for later
+
+   int output_bytes = out_n*bytes;
+   int filter_bytes = img_n*bytes;
+   int width = x;
+
+   STBI_ASSERT(out_n == s->img_n || out_n == s->img_n+1);
+   a->out = (stbi_uc *) stbi__malloc_mad3(x, y, output_bytes, 0); // extra bytes to write off the end into
+   if (!a->out) return stbi__err("outofmem", "Out of memory");
+
+   if (!stbi__mad3sizes_valid(img_n, x, depth, 7)) return stbi__err("too large", "Corrupt PNG");
+   img_width_bytes = (((img_n * x * depth) + 7) >> 3);
+   img_len = (img_width_bytes + 1) * y;
+
+   // we used to check for exact match between raw_len and img_len on non-interlaced PNGs,
+   // but issue #276 reported a PNG in the wild that had extra data at the end (all zeros),
+   // so just check for raw_len < img_len always.
+   if (raw_len < img_len) return stbi__err("not enough pixels","Corrupt PNG");
+
+   for (j=0; j < y; ++j) {
+      stbi_uc *cur = a->out + stride*j;
+      stbi_uc *prior;
+      int filter = *raw++;
+
+      if (filter > 4)
+         return stbi__err("invalid filter","Corrupt PNG");
+
+      if (depth < 8) {
+         if (img_width_bytes > x) return stbi__err("invalid width","Corrupt PNG");
+         cur += x*out_n - img_width_bytes; // store output to the rightmost img_len bytes, so we can decode in place
+         filter_bytes = 1;
+         width = img_width_bytes;
+      }
+      prior = cur - stride; // bugfix: need to compute this after 'cur +=' computation above
+
+      // if first row, use special filter that doesn't sample previous row
+      if (j == 0) filter = first_row_filter[filter];
+
+      // handle first byte explicitly
+      for (k=0; k < filter_bytes; ++k) {
+         switch (filter) {
+            case STBI__F_none       : cur[k] = raw[k]; break;
+            case STBI__F_sub        : cur[k] = raw[k]; break;
+            case STBI__F_up         : cur[k] = STBI__BYTECAST(raw[k] + prior[k]); break;
+            case STBI__F_avg        : cur[k] = STBI__BYTECAST(raw[k] + (prior[k]>>1)); break;
+            case STBI__F_paeth      : cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(0,prior[k],0)); break;
+            case STBI__F_avg_first  : cur[k] = raw[k]; break;
+            case STBI__F_paeth_first: cur[k] = raw[k]; break;
+         }
+      }
+
+      if (depth == 8) {
+         if (img_n != out_n)
+            cur[img_n] = 255; // first pixel
+         raw += img_n;
+         cur += out_n;
+         prior += out_n;
+      } else if (depth == 16) {
+         if (img_n != out_n) {
+            cur[filter_bytes]   = 255; // first pixel top byte
+            cur[filter_bytes+1] = 255; // first pixel bottom byte
+         }
+         raw += filter_bytes;
+         cur += output_bytes;
+         prior += output_bytes;
+      } else {
+         raw += 1;
+         cur += 1;
+         prior += 1;
+      }
+
+      // this is a little gross, so that we don't switch per-pixel or per-component
+      if (depth < 8 || img_n == out_n) {
+         int nk = (width - 1)*filter_bytes;
+         #define STBI__CASE(f) \
+             case f:     \
+                for (k=0; k < nk; ++k)
+         switch (filter) {
+            // "none" filter turns into a memcpy here; make that explicit.
+            case STBI__F_none:         memcpy(cur, raw, nk); break;
+            STBI__CASE(STBI__F_sub)          { cur[k] = STBI__BYTECAST(raw[k] + cur[k-filter_bytes]); } break;
+            STBI__CASE(STBI__F_up)           { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); } break;
+            STBI__CASE(STBI__F_avg)          { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k-filter_bytes])>>1)); } break;
+            STBI__CASE(STBI__F_paeth)        { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-filter_bytes],prior[k],prior[k-filter_bytes])); } break;
+            STBI__CASE(STBI__F_avg_first)    { cur[k] = STBI__BYTECAST(raw[k] + (cur[k-filter_bytes] >> 1)); } break;
+            STBI__CASE(STBI__F_paeth_first)  { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-filter_bytes],0,0)); } break;
+         }
+         #undef STBI__CASE
+         raw += nk;
+      } else {
+         STBI_ASSERT(img_n+1 == out_n);
+         #define STBI__CASE(f) \
+             case f:     \
+                for (i=x-1; i >= 1; --i, cur[filter_bytes]=255,raw+=filter_bytes,cur+=output_bytes,prior+=output_bytes) \
+                   for (k=0; k < filter_bytes; ++k)
+         switch (filter) {
+            STBI__CASE(STBI__F_none)         { cur[k] = raw[k]; } break;
+            STBI__CASE(STBI__F_sub)          { cur[k] = STBI__BYTECAST(raw[k] + cur[k- output_bytes]); } break;
+            STBI__CASE(STBI__F_up)           { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); } break;
+            STBI__CASE(STBI__F_avg)          { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k- output_bytes])>>1)); } break;
+            STBI__CASE(STBI__F_paeth)        { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k- output_bytes],prior[k],prior[k- output_bytes])); } break;
+            STBI__CASE(STBI__F_avg_first)    { cur[k] = STBI__BYTECAST(raw[k] + (cur[k- output_bytes] >> 1)); } break;
+            STBI__CASE(STBI__F_paeth_first)  { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k- output_bytes],0,0)); } break;
+         }
+         #undef STBI__CASE
+
+         // the loop above sets the high byte of the pixels' alpha, but for
+         // 16 bit png files we also need the low byte set. we'll do that here.
+         if (depth == 16) {
+            cur = a->out + stride*j; // start at the beginning of the row again
+            for (i=0; i < x; ++i,cur+=output_bytes) {
+               cur[filter_bytes+1] = 255;
+            }
+         }
+      }
+   }
+
+   // we make a separate pass to expand bits to pixels; for performance,
+   // this could run two scanlines behind the above code, so it won't
+   // intefere with filtering but will still be in the cache.
+   if (depth < 8) {
+      for (j=0; j < y; ++j) {
+         stbi_uc *cur = a->out + stride*j;
+         stbi_uc *in  = a->out + stride*j + x*out_n - img_width_bytes;
+         // unpack 1/2/4-bit into a 8-bit buffer. allows us to keep the common 8-bit path optimal at minimal cost for 1/2/4-bit
+         // png guarante byte alignment, if width is not multiple of 8/4/2 we'll decode dummy trailing data that will be skipped in the later loop
+         stbi_uc scale = (color == 0) ? stbi__depth_scale_table[depth] : 1; // scale grayscale values to 0..255 range
+
+         // note that the final byte might overshoot and write more data than desired.
+         // we can allocate enough data that this never writes out of memory, but it
+         // could also overwrite the next scanline. can it overwrite non-empty data
+         // on the next scanline? yes, consider 1-pixel-wide scanlines with 1-bit-per-pixel.
+         // so we need to explicitly clamp the final ones
+
+         if (depth == 4) {
+            for (k=x*img_n; k >= 2; k-=2, ++in) {
+               *cur++ = scale * ((*in >> 4)       );
+               *cur++ = scale * ((*in     ) & 0x0f);
+            }
+            if (k > 0) *cur++ = scale * ((*in >> 4)       );
+         } else if (depth == 2) {
+            for (k=x*img_n; k >= 4; k-=4, ++in) {
+               *cur++ = scale * ((*in >> 6)       );
+               *cur++ = scale * ((*in >> 4) & 0x03);
+               *cur++ = scale * ((*in >> 2) & 0x03);
+               *cur++ = scale * ((*in     ) & 0x03);
+            }
+            if (k > 0) *cur++ = scale * ((*in >> 6)       );
+            if (k > 1) *cur++ = scale * ((*in >> 4) & 0x03);
+            if (k > 2) *cur++ = scale * ((*in >> 2) & 0x03);
+         } else if (depth == 1) {
+            for (k=x*img_n; k >= 8; k-=8, ++in) {
+               *cur++ = scale * ((*in >> 7)       );
+               *cur++ = scale * ((*in >> 6) & 0x01);
+               *cur++ = scale * ((*in >> 5) & 0x01);
+               *cur++ = scale * ((*in >> 4) & 0x01);
+               *cur++ = scale * ((*in >> 3) & 0x01);
+               *cur++ = scale * ((*in >> 2) & 0x01);
+               *cur++ = scale * ((*in >> 1) & 0x01);
+               *cur++ = scale * ((*in     ) & 0x01);
+            }
+            if (k > 0) *cur++ = scale * ((*in >> 7)       );
+            if (k > 1) *cur++ = scale * ((*in >> 6) & 0x01);
+            if (k > 2) *cur++ = scale * ((*in >> 5) & 0x01);
+            if (k > 3) *cur++ = scale * ((*in >> 4) & 0x01);
+            if (k > 4) *cur++ = scale * ((*in >> 3) & 0x01);
+            if (k > 5) *cur++ = scale * ((*in >> 2) & 0x01);
+            if (k > 6) *cur++ = scale * ((*in >> 1) & 0x01);
+         }
+         if (img_n != out_n) {
+            int q;
+            // insert alpha = 255
+            cur = a->out + stride*j;
+            if (img_n == 1) {
+               for (q=x-1; q >= 0; --q) {
+                  cur[q*2+1] = 255;
+                  cur[q*2+0] = cur[q];
+               }
+            } else {
+               STBI_ASSERT(img_n == 3);
+               for (q=x-1; q >= 0; --q) {
+                  cur[q*4+3] = 255;
+                  cur[q*4+2] = cur[q*3+2];
+                  cur[q*4+1] = cur[q*3+1];
+                  cur[q*4+0] = cur[q*3+0];
+               }
+            }
+         }
+      }
+   } else if (depth == 16) {
+      // force the image data from big-endian to platform-native.
+      // this is done in a separate pass due to the decoding relying
+      // on the data being untouched, but could probably be done
+      // per-line during decode if care is taken.
+      stbi_uc *cur = a->out;
+      stbi__uint16 *cur16 = (stbi__uint16*)cur;
+
+      for(i=0; i < x*y*out_n; ++i,cur16++,cur+=2) {
+         *cur16 = (cur[0] << 8) | cur[1];
+      }
+   }
+
+   return 1;
+}
+
+static int stbi__create_png_image(stbi__png *a, stbi_uc *image_data, stbi__uint32 image_data_len, int out_n, int depth, int color, int interlaced)
+{
+   int bytes = (depth == 16 ? 2 : 1);
+   int out_bytes = out_n * bytes;
+   stbi_uc *final;
+   int p;
+   if (!interlaced)
+      return stbi__create_png_image_raw(a, image_data, image_data_len, out_n, a->s->img_x, a->s->img_y, depth, color);
+
+   // de-interlacing
+   final = (stbi_uc *) stbi__malloc_mad3(a->s->img_x, a->s->img_y, out_bytes, 0);
+   for (p=0; p < 7; ++p) {
+      int xorig[] = { 0,4,0,2,0,1,0 };
+      int yorig[] = { 0,0,4,0,2,0,1 };
+      int xspc[]  = { 8,8,4,4,2,2,1 };
+      int yspc[]  = { 8,8,8,4,4,2,2 };
+      int i,j,x,y;
+      // pass1_x[4] = 0, pass1_x[5] = 1, pass1_x[12] = 1
+      x = (a->s->img_x - xorig[p] + xspc[p]-1) / xspc[p];
+      y = (a->s->img_y - yorig[p] + yspc[p]-1) / yspc[p];
+      if (x && y) {
+         stbi__uint32 img_len = ((((a->s->img_n * x * depth) + 7) >> 3) + 1) * y;
+         if (!stbi__create_png_image_raw(a, image_data, image_data_len, out_n, x, y, depth, color)) {
+            STBI_FREE(final);
+            return 0;
+         }
+         for (j=0; j < y; ++j) {
+            for (i=0; i < x; ++i) {
+               int out_y = j*yspc[p]+yorig[p];
+               int out_x = i*xspc[p]+xorig[p];
+               memcpy(final + out_y*a->s->img_x*out_bytes + out_x*out_bytes,
+                      a->out + (j*x+i)*out_bytes, out_bytes);
+            }
+         }
+         STBI_FREE(a->out);
+         image_data += img_len;
+         image_data_len -= img_len;
+      }
+   }
+   a->out = final;
+
+   return 1;
+}
+
+static int stbi__compute_transparency(stbi__png *z, stbi_uc tc[3], int out_n)
+{
+   stbi__context *s = z->s;
+   stbi__uint32 i, pixel_count = s->img_x * s->img_y;
+   stbi_uc *p = z->out;
+
+   // compute color-based transparency, assuming we've
+   // already got 255 as the alpha value in the output
+   STBI_ASSERT(out_n == 2 || out_n == 4);
+
+   if (out_n == 2) {
+      for (i=0; i < pixel_count; ++i) {
+         p[1] = (p[0] == tc[0] ? 0 : 255);
+         p += 2;
+      }
+   } else {
+      for (i=0; i < pixel_count; ++i) {
+         if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2])
+            p[3] = 0;
+         p += 4;
+      }
+   }
+   return 1;
+}
+
+static int stbi__compute_transparency16(stbi__png *z, stbi__uint16 tc[3], int out_n)
+{
+   stbi__context *s = z->s;
+   stbi__uint32 i, pixel_count = s->img_x * s->img_y;
+   stbi__uint16 *p = (stbi__uint16*) z->out;
+
+   // compute color-based transparency, assuming we've
+   // already got 65535 as the alpha value in the output
+   STBI_ASSERT(out_n == 2 || out_n == 4);
+
+   if (out_n == 2) {
+      for (i = 0; i < pixel_count; ++i) {
+         p[1] = (p[0] == tc[0] ? 0 : 65535);
+         p += 2;
+      }
+   } else {
+      for (i = 0; i < pixel_count; ++i) {
+         if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2])
+            p[3] = 0;
+         p += 4;
+      }
+   }
+   return 1;
+}
+
+static int stbi__expand_png_palette(stbi__png *a, stbi_uc *palette, int len, int pal_img_n)
+{
+   stbi__uint32 i, pixel_count = a->s->img_x * a->s->img_y;
+   stbi_uc *p, *temp_out, *orig = a->out;
+
+   p = (stbi_uc *) stbi__malloc_mad2(pixel_count, pal_img_n, 0);
+   if (p == NULL) return stbi__err("outofmem", "Out of memory");
+
+   // between here and free(out) below, exitting would leak
+   temp_out = p;
+
+   if (pal_img_n == 3) {
+      for (i=0; i < pixel_count; ++i) {
+         int n = orig[i]*4;
+         p[0] = palette[n  ];
+         p[1] = palette[n+1];
+         p[2] = palette[n+2];
+         p += 3;
+      }
+   } else {
+      for (i=0; i < pixel_count; ++i) {
+         int n = orig[i]*4;
+         p[0] = palette[n  ];
+         p[1] = palette[n+1];
+         p[2] = palette[n+2];
+         p[3] = palette[n+3];
+         p += 4;
+      }
+   }
+   STBI_FREE(a->out);
+   a->out = temp_out;
+
+   STBI_NOTUSED(len);
+
+   return 1;
+}
+
+static int stbi__unpremultiply_on_load = 0;
+static int stbi__de_iphone_flag = 0;
+
+STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
+{
+   stbi__unpremultiply_on_load = flag_true_if_should_unpremultiply;
+}
+
+STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
+{
+   stbi__de_iphone_flag = flag_true_if_should_convert;
+}
+
+static void stbi__de_iphone(stbi__png *z)
+{
+   stbi__context *s = z->s;
+   stbi__uint32 i, pixel_count = s->img_x * s->img_y;
+   stbi_uc *p = z->out;
+
+   if (s->img_out_n == 3) {  // convert bgr to rgb
+      for (i=0; i < pixel_count; ++i) {
+         stbi_uc t = p[0];
+         p[0] = p[2];
+         p[2] = t;
+         p += 3;
+      }
+   } else {
+      STBI_ASSERT(s->img_out_n == 4);
+      if (stbi__unpremultiply_on_load) {
+         // convert bgr to rgb and unpremultiply
+         for (i=0; i < pixel_count; ++i) {
+            stbi_uc a = p[3];
+            stbi_uc t = p[0];
+            if (a) {
+               stbi_uc half = a / 2;
+               p[0] = (p[2] * 255 + half) / a;
+               p[1] = (p[1] * 255 + half) / a;
+               p[2] = ( t   * 255 + half) / a;
+            } else {
+               p[0] = p[2];
+               p[2] = t;
+            }
+            p += 4;
+         }
+      } else {
+         // convert bgr to rgb
+         for (i=0; i < pixel_count; ++i) {
+            stbi_uc t = p[0];
+            p[0] = p[2];
+            p[2] = t;
+            p += 4;
+         }
+      }
+   }
+}
+
+#define STBI__PNG_TYPE(a,b,c,d)  (((unsigned) (a) << 24) + ((unsigned) (b) << 16) + ((unsigned) (c) << 8) + (unsigned) (d))
+
+static int stbi__parse_png_file(stbi__png *z, int scan, int req_comp)
+{
+   stbi_uc palette[1024], pal_img_n=0;
+   stbi_uc has_trans=0, tc[3]={0};
+   stbi__uint16 tc16[3];
+   stbi__uint32 ioff=0, idata_limit=0, i, pal_len=0;
+   int first=1,k,interlace=0, color=0, is_iphone=0;
+   stbi__context *s = z->s;
+
+   z->expanded = NULL;
+   z->idata = NULL;
+   z->out = NULL;
+
+   if (!stbi__check_png_header(s)) return 0;
+
+   if (scan == STBI__SCAN_type) return 1;
+
+   for (;;) {
+      stbi__pngchunk c = stbi__get_chunk_header(s);
+      switch (c.type) {
+         case STBI__PNG_TYPE('C','g','B','I'):
+            is_iphone = 1;
+            stbi__skip(s, c.length);
+            break;
+         case STBI__PNG_TYPE('I','H','D','R'): {
+            int comp,filter;
+            if (!first) return stbi__err("multiple IHDR","Corrupt PNG");
+            first = 0;
+            if (c.length != 13) return stbi__err("bad IHDR len","Corrupt PNG");
+            s->img_x = stbi__get32be(s);
+            s->img_y = stbi__get32be(s);
+            if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)");
+            if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)");
+            z->depth = stbi__get8(s);  if (z->depth != 1 && z->depth != 2 && z->depth != 4 && z->depth != 8 && z->depth != 16)  return stbi__err("1/2/4/8/16-bit only","PNG not supported: 1/2/4/8/16-bit only");
+            color = stbi__get8(s);  if (color > 6)         return stbi__err("bad ctype","Corrupt PNG");
+            if (color == 3 && z->depth == 16)                  return stbi__err("bad ctype","Corrupt PNG");
+            if (color == 3) pal_img_n = 3; else if (color & 1) return stbi__err("bad ctype","Corrupt PNG");
+            comp  = stbi__get8(s);  if (comp) return stbi__err("bad comp method","Corrupt PNG");
+            filter= stbi__get8(s);  if (filter) return stbi__err("bad filter method","Corrupt PNG");
+            interlace = stbi__get8(s); if (interlace>1) return stbi__err("bad interlace method","Corrupt PNG");
+            if (!s->img_x || !s->img_y) return stbi__err("0-pixel image","Corrupt PNG");
+            if (!pal_img_n) {
+               s->img_n = (color & 2 ? 3 : 1) + (color & 4 ? 1 : 0);
+               if ((1 << 30) / s->img_x / s->img_n < s->img_y) return stbi__err("too large", "Image too large to decode");
+               if (scan == STBI__SCAN_header) return 1;
+            } else {
+               // if paletted, then pal_n is our final components, and
+               // img_n is # components to decompress/filter.
+               s->img_n = 1;
+               if ((1 << 30) / s->img_x / 4 < s->img_y) return stbi__err("too large","Corrupt PNG");
+               // if SCAN_header, have to scan to see if we have a tRNS
+            }
+            break;
+         }
+
+         case STBI__PNG_TYPE('P','L','T','E'):  {
+            if (first) return stbi__err("first not IHDR", "Corrupt PNG");
+            if (c.length > 256*3) return stbi__err("invalid PLTE","Corrupt PNG");
+            pal_len = c.length / 3;
+            if (pal_len * 3 != c.length) return stbi__err("invalid PLTE","Corrupt PNG");
+            for (i=0; i < pal_len; ++i) {
+               palette[i*4+0] = stbi__get8(s);
+               palette[i*4+1] = stbi__get8(s);
+               palette[i*4+2] = stbi__get8(s);
+               palette[i*4+3] = 255;
+            }
+            break;
+         }
+
+         case STBI__PNG_TYPE('t','R','N','S'): {
+            if (first) return stbi__err("first not IHDR", "Corrupt PNG");
+            if (z->idata) return stbi__err("tRNS after IDAT","Corrupt PNG");
+            if (pal_img_n) {
+               if (scan == STBI__SCAN_header) { s->img_n = 4; return 1; }
+               if (pal_len == 0) return stbi__err("tRNS before PLTE","Corrupt PNG");
+               if (c.length > pal_len) return stbi__err("bad tRNS len","Corrupt PNG");
+               pal_img_n = 4;
+               for (i=0; i < c.length; ++i)
+                  palette[i*4+3] = stbi__get8(s);
+            } else {
+               if (!(s->img_n & 1)) return stbi__err("tRNS with alpha","Corrupt PNG");
+               if (c.length != (stbi__uint32) s->img_n*2) return stbi__err("bad tRNS len","Corrupt PNG");
+               has_trans = 1;
+               if (z->depth == 16) {
+                  for (k = 0; k < s->img_n; ++k) tc16[k] = (stbi__uint16)stbi__get16be(s); // copy the values as-is
+               } else {
+                  for (k = 0; k < s->img_n; ++k) tc[k] = (stbi_uc)(stbi__get16be(s) & 255) * stbi__depth_scale_table[z->depth]; // non 8-bit images will be larger
+               }
+            }
+            break;
+         }
+
+         case STBI__PNG_TYPE('I','D','A','T'): {
+            if (first) return stbi__err("first not IHDR", "Corrupt PNG");
+            if (pal_img_n && !pal_len) return stbi__err("no PLTE","Corrupt PNG");
+            if (scan == STBI__SCAN_header) { s->img_n = pal_img_n; return 1; }
+            if ((int)(ioff + c.length) < (int)ioff) return 0;
+            if (ioff + c.length > idata_limit) {
+               stbi__uint32 idata_limit_old = idata_limit;
+               stbi_uc *p;
+               if (idata_limit == 0) idata_limit = c.length > 4096 ? c.length : 4096;
+               while (ioff + c.length > idata_limit)
+                  idata_limit *= 2;
+               STBI_NOTUSED(idata_limit_old);
+               p = (stbi_uc *) STBI_REALLOC_SIZED(z->idata, idata_limit_old, idata_limit); if (p == NULL) return stbi__err("outofmem", "Out of memory");
+               z->idata = p;
+            }
+            if (!stbi__getn(s, z->idata+ioff,c.length)) return stbi__err("outofdata","Corrupt PNG");
+            ioff += c.length;
+            break;
+         }
+
+         case STBI__PNG_TYPE('I','E','N','D'): {
+            stbi__uint32 raw_len, bpl;
+            if (first) return stbi__err("first not IHDR", "Corrupt PNG");
+            if (scan != STBI__SCAN_load) return 1;
+            if (z->idata == NULL) return stbi__err("no IDAT","Corrupt PNG");
+            // initial guess for decoded data size to avoid unnecessary reallocs
+            bpl = (s->img_x * z->depth + 7) / 8; // bytes per line, per component
+            raw_len = bpl * s->img_y * s->img_n /* pixels */ + s->img_y /* filter mode per row */;
+            z->expanded = (stbi_uc *) stbi_zlib_decode_malloc_guesssize_headerflag((char *) z->idata, ioff, raw_len, (int *) &raw_len, !is_iphone);
+            if (z->expanded == NULL) return 0; // zlib should set error
+            STBI_FREE(z->idata); z->idata = NULL;
+            if ((req_comp == s->img_n+1 && req_comp != 3 && !pal_img_n) || has_trans)
+               s->img_out_n = s->img_n+1;
+            else
+               s->img_out_n = s->img_n;
+            if (!stbi__create_png_image(z, z->expanded, raw_len, s->img_out_n, z->depth, color, interlace)) return 0;
+            if (has_trans) {
+               if (z->depth == 16) {
+                  if (!stbi__compute_transparency16(z, tc16, s->img_out_n)) return 0;
+               } else {
+                  if (!stbi__compute_transparency(z, tc, s->img_out_n)) return 0;
+               }
+            }
+            if (is_iphone && stbi__de_iphone_flag && s->img_out_n > 2)
+               stbi__de_iphone(z);
+            if (pal_img_n) {
+               // pal_img_n == 3 or 4
+               s->img_n = pal_img_n; // record the actual colors we had
+               s->img_out_n = pal_img_n;
+               if (req_comp >= 3) s->img_out_n = req_comp;
+               if (!stbi__expand_png_palette(z, palette, pal_len, s->img_out_n))
+                  return 0;
+            } else if (has_trans) {
+               // non-paletted image with tRNS -> source image has (constant) alpha
+               ++s->img_n;
+            }
+            STBI_FREE(z->expanded); z->expanded = NULL;
+            // end of PNG chunk, read and skip CRC
+            stbi__get32be(s);
+            return 1;
+         }
+
+         default:
+            // if critical, fail
+            if (first) return stbi__err("first not IHDR", "Corrupt PNG");
+            if ((c.type & (1 << 29)) == 0) {
+               #ifndef STBI_NO_FAILURE_STRINGS
+               // not threadsafe
+               static char invalid_chunk[] = "XXXX PNG chunk not known";
+               invalid_chunk[0] = STBI__BYTECAST(c.type >> 24);
+               invalid_chunk[1] = STBI__BYTECAST(c.type >> 16);
+               invalid_chunk[2] = STBI__BYTECAST(c.type >>  8);
+               invalid_chunk[3] = STBI__BYTECAST(c.type >>  0);
+               #endif
+               return stbi__err(invalid_chunk, "PNG not supported: unknown PNG chunk type");
+            }
+            stbi__skip(s, c.length);
+            break;
+      }
+      // end of PNG chunk, read and skip CRC
+      stbi__get32be(s);
+   }
+}
+
+static void *stbi__do_png(stbi__png *p, int *x, int *y, int *n, int req_comp, stbi__result_info *ri)
+{
+   void *result=NULL;
+   if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error");
+   if (stbi__parse_png_file(p, STBI__SCAN_load, req_comp)) {
+      if (p->depth <= 8)
+         ri->bits_per_channel = 8;
+      else if (p->depth == 16)
+         ri->bits_per_channel = 16;
+      else
+         return stbi__errpuc("bad bits_per_channel", "PNG not supported: unsupported color depth");
+      result = p->out;
+      p->out = NULL;
+      if (req_comp && req_comp != p->s->img_out_n) {
+         if (ri->bits_per_channel == 8)
+            result = stbi__convert_format((unsigned char *) result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y);
+         else
+            result = stbi__convert_format16((stbi__uint16 *) result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y);
+         p->s->img_out_n = req_comp;
+         if (result == NULL) return result;
+      }
+      *x = p->s->img_x;
+      *y = p->s->img_y;
+      if (n) *n = p->s->img_n;
+   }
+   STBI_FREE(p->out);      p->out      = NULL;
+   STBI_FREE(p->expanded); p->expanded = NULL;
+   STBI_FREE(p->idata);    p->idata    = NULL;
+
+   return result;
+}
+
+static void *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
+{
+   stbi__png p;
+   p.s = s;
+   return stbi__do_png(&p, x,y,comp,req_comp, ri);
+}
+
+static int stbi__png_test(stbi__context *s)
+{
+   int r;
+   r = stbi__check_png_header(s);
+   stbi__rewind(s);
+   return r;
+}
+
+static int stbi__png_info_raw(stbi__png *p, int *x, int *y, int *comp)
+{
+   if (!stbi__parse_png_file(p, STBI__SCAN_header, 0)) {
+      stbi__rewind( p->s );
+      return 0;
+   }
+   if (x) *x = p->s->img_x;
+   if (y) *y = p->s->img_y;
+   if (comp) *comp = p->s->img_n;
+   return 1;
+}
+
+static int stbi__png_info(stbi__context *s, int *x, int *y, int *comp)
+{
+   stbi__png p;
+   p.s = s;
+   return stbi__png_info_raw(&p, x, y, comp);
+}
+
+static int stbi__png_is16(stbi__context *s)
+{
+   stbi__png p;
+   p.s = s;
+   if (!stbi__png_info_raw(&p, NULL, NULL, NULL))
+           return 0;
+   if (p.depth != 16) {
+      stbi__rewind(p.s);
+      return 0;
+   }
+   return 1;
+}
+#endif
+
+// Microsoft/Windows BMP image
+
+#ifndef STBI_NO_BMP
+static int stbi__bmp_test_raw(stbi__context *s)
+{
+   int r;
+   int sz;
+   if (stbi__get8(s) != 'B') return 0;
+   if (stbi__get8(s) != 'M') return 0;
+   stbi__get32le(s); // discard filesize
+   stbi__get16le(s); // discard reserved
+   stbi__get16le(s); // discard reserved
+   stbi__get32le(s); // discard data offset
+   sz = stbi__get32le(s);
+   r = (sz == 12 || sz == 40 || sz == 56 || sz == 108 || sz == 124);
+   return r;
+}
+
+static int stbi__bmp_test(stbi__context *s)
+{
+   int r = stbi__bmp_test_raw(s);
+   stbi__rewind(s);
+   return r;
+}
+
+
+// returns 0..31 for the highest set bit
+static int stbi__high_bit(unsigned int z)
+{
+   int n=0;
+   if (z == 0) return -1;
+   if (z >= 0x10000) { n += 16; z >>= 16; }
+   if (z >= 0x00100) { n +=  8; z >>=  8; }
+   if (z >= 0x00010) { n +=  4; z >>=  4; }
+   if (z >= 0x00004) { n +=  2; z >>=  2; }
+   if (z >= 0x00002) { n +=  1;/* >>=  1;*/ }
+   return n;
+}
+
+static int stbi__bitcount(unsigned int a)
+{
+   a = (a & 0x55555555) + ((a >>  1) & 0x55555555); // max 2
+   a = (a & 0x33333333) + ((a >>  2) & 0x33333333); // max 4
+   a = (a + (a >> 4)) & 0x0f0f0f0f; // max 8 per 4, now 8 bits
+   a = (a + (a >> 8)); // max 16 per 8 bits
+   a = (a + (a >> 16)); // max 32 per 8 bits
+   return a & 0xff;
+}
+
+// extract an arbitrarily-aligned N-bit value (N=bits)
+// from v, and then make it 8-bits long and fractionally
+// extend it to full full range.
+static int stbi__shiftsigned(unsigned int v, int shift, int bits)
+{
+   static unsigned int mul_table[9] = {
+      0,
+      0xff/*0b11111111*/, 0x55/*0b01010101*/, 0x49/*0b01001001*/, 0x11/*0b00010001*/,
+      0x21/*0b00100001*/, 0x41/*0b01000001*/, 0x81/*0b10000001*/, 0x01/*0b00000001*/,
+   };
+   static unsigned int shift_table[9] = {
+      0, 0,0,1,0,2,4,6,0,
+   };
+   if (shift < 0)
+      v <<= -shift;
+   else
+      v >>= shift;
+   STBI_ASSERT(v < 256);
+   v >>= (8-bits);
+   STBI_ASSERT(bits >= 0 && bits <= 8);
+   return (int) ((unsigned) v * mul_table[bits]) >> shift_table[bits];
+}
+
+typedef struct
+{
+   int bpp, offset, hsz;
+   unsigned int mr,mg,mb,ma, all_a;
+   int extra_read;
+} stbi__bmp_data;
+
+static void *stbi__bmp_parse_header(stbi__context *s, stbi__bmp_data *info)
+{
+   int hsz;
+   if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M') return stbi__errpuc("not BMP", "Corrupt BMP");
+   stbi__get32le(s); // discard filesize
+   stbi__get16le(s); // discard reserved
+   stbi__get16le(s); // discard reserved
+   info->offset = stbi__get32le(s);
+   info->hsz = hsz = stbi__get32le(s);
+   info->mr = info->mg = info->mb = info->ma = 0;
+   info->extra_read = 14;
+
+   if (info->offset < 0) return stbi__errpuc("bad BMP", "bad BMP");
+
+   if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124) return stbi__errpuc("unknown BMP", "BMP type not supported: unknown");
+   if (hsz == 12) {
+      s->img_x = stbi__get16le(s);
+      s->img_y = stbi__get16le(s);
+   } else {
+      s->img_x = stbi__get32le(s);
+      s->img_y = stbi__get32le(s);
+   }
+   if (stbi__get16le(s) != 1) return stbi__errpuc("bad BMP", "bad BMP");
+   info->bpp = stbi__get16le(s);
+   if (hsz != 12) {
+      int compress = stbi__get32le(s);
+      if (compress == 1 || compress == 2) return stbi__errpuc("BMP RLE", "BMP type not supported: RLE");
+      stbi__get32le(s); // discard sizeof
+      stbi__get32le(s); // discard hres
+      stbi__get32le(s); // discard vres
+      stbi__get32le(s); // discard colorsused
+      stbi__get32le(s); // discard max important
+      if (hsz == 40 || hsz == 56) {
+         if (hsz == 56) {
+            stbi__get32le(s);
+            stbi__get32le(s);
+            stbi__get32le(s);
+            stbi__get32le(s);
+         }
+         if (info->bpp == 16 || info->bpp == 32) {
+            if (compress == 0) {
+               if (info->bpp == 32) {
+                  info->mr = 0xffu << 16;
+                  info->mg = 0xffu <<  8;
+                  info->mb = 0xffu <<  0;
+                  info->ma = 0xffu << 24;
+                  info->all_a = 0; // if all_a is 0 at end, then we loaded alpha channel but it was all 0
+               } else {
+                  info->mr = 31u << 10;
+                  info->mg = 31u <<  5;
+                  info->mb = 31u <<  0;
+               }
+            } else if (compress == 3) {
+               info->mr = stbi__get32le(s);
+               info->mg = stbi__get32le(s);
+               info->mb = stbi__get32le(s);
+               info->extra_read += 12;
+               // not documented, but generated by photoshop and handled by mspaint
+               if (info->mr == info->mg && info->mg == info->mb) {
+                  // ?!?!?
+                  return stbi__errpuc("bad BMP", "bad BMP");
+               }
+            } else
+               return stbi__errpuc("bad BMP", "bad BMP");
+         }
+      } else {
+         int i;
+         if (hsz != 108 && hsz != 124)
+            return stbi__errpuc("bad BMP", "bad BMP");
+         info->mr = stbi__get32le(s);
+         info->mg = stbi__get32le(s);
+         info->mb = stbi__get32le(s);
+         info->ma = stbi__get32le(s);
+         stbi__get32le(s); // discard color space
+         for (i=0; i < 12; ++i)
+            stbi__get32le(s); // discard color space parameters
+         if (hsz == 124) {
+            stbi__get32le(s); // discard rendering intent
+            stbi__get32le(s); // discard offset of profile data
+            stbi__get32le(s); // discard size of profile data
+            stbi__get32le(s); // discard reserved
+         }
+      }
+   }
+   return (void *) 1;
+}
+
+
+static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
+{
+   stbi_uc *out;
+   unsigned int mr=0,mg=0,mb=0,ma=0, all_a;
+   stbi_uc pal[256][4];
+   int psize=0,i,j,width;
+   int flip_vertically, pad, target;
+   stbi__bmp_data info;
+   STBI_NOTUSED(ri);
+
+   info.all_a = 255;
+   if (stbi__bmp_parse_header(s, &info) == NULL)
+      return NULL; // error code already set
+
+   flip_vertically = ((int) s->img_y) > 0;
+   s->img_y = abs((int) s->img_y);
+
+   if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
+   if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
+
+   mr = info.mr;
+   mg = info.mg;
+   mb = info.mb;
+   ma = info.ma;
+   all_a = info.all_a;
+
+   if (info.hsz == 12) {
+      if (info.bpp < 24)
+         psize = (info.offset - info.extra_read - 24) / 3;
+   } else {
+      if (info.bpp < 16)
+         psize = (info.offset - info.extra_read - info.hsz) >> 2;
+   }
+   if (psize == 0) {
+      STBI_ASSERT(info.offset == s->callback_already_read + (int) (s->img_buffer - s->img_buffer_original));
+      if (info.offset != s->callback_already_read + (s->img_buffer - s->buffer_start)) {
+        return stbi__errpuc("bad offset", "Corrupt BMP");
+      }
+   }
+
+   if (info.bpp == 24 && ma == 0xff000000)
+      s->img_n = 3;
+   else
+      s->img_n = ma ? 4 : 3;
+   if (req_comp && req_comp >= 3) // we can directly decode 3 or 4
+      target = req_comp;
+   else
+      target = s->img_n; // if they want monochrome, we'll post-convert
+
+   // sanity-check size
+   if (!stbi__mad3sizes_valid(target, s->img_x, s->img_y, 0))
+      return stbi__errpuc("too large", "Corrupt BMP");
+
+   out = (stbi_uc *) stbi__malloc_mad3(target, s->img_x, s->img_y, 0);
+   if (!out) return stbi__errpuc("outofmem", "Out of memory");
+   if (info.bpp < 16) {
+      int z=0;
+      if (psize == 0 || psize > 256) { STBI_FREE(out); return stbi__errpuc("invalid", "Corrupt BMP"); }
+      for (i=0; i < psize; ++i) {
+         pal[i][2] = stbi__get8(s);
+         pal[i][1] = stbi__get8(s);
+         pal[i][0] = stbi__get8(s);
+         if (info.hsz != 12) stbi__get8(s);
+         pal[i][3] = 255;
+      }
+      stbi__skip(s, info.offset - info.extra_read - info.hsz - psize * (info.hsz == 12 ? 3 : 4));
+      if (info.bpp == 1) width = (s->img_x + 7) >> 3;
+      else if (info.bpp == 4) width = (s->img_x + 1) >> 1;
+      else if (info.bpp == 8) width = s->img_x;
+      else { STBI_FREE(out); return stbi__errpuc("bad bpp", "Corrupt BMP"); }
+      pad = (-width)&3;
+      if (info.bpp == 1) {
+         for (j=0; j < (int) s->img_y; ++j) {
+            int bit_offset = 7, v = stbi__get8(s);
+            for (i=0; i < (int) s->img_x; ++i) {
+               int color = (v>>bit_offset)&0x1;
+               out[z++] = pal[color][0];
+               out[z++] = pal[color][1];
+               out[z++] = pal[color][2];
+               if (target == 4) out[z++] = 255;
+               if (i+1 == (int) s->img_x) break;
+               if((--bit_offset) < 0) {
+                  bit_offset = 7;
+                  v = stbi__get8(s);
+               }
+            }
+            stbi__skip(s, pad);
+         }
+      } else {
+         for (j=0; j < (int) s->img_y; ++j) {
+            for (i=0; i < (int) s->img_x; i += 2) {
+               int v=stbi__get8(s),v2=0;
+               if (info.bpp == 4) {
+                  v2 = v & 15;
+                  v >>= 4;
+               }
+               out[z++] = pal[v][0];
+               out[z++] = pal[v][1];
+               out[z++] = pal[v][2];
+               if (target == 4) out[z++] = 255;
+               if (i+1 == (int) s->img_x) break;
+               v = (info.bpp == 8) ? stbi__get8(s) : v2;
+               out[z++] = pal[v][0];
+               out[z++] = pal[v][1];
+               out[z++] = pal[v][2];
+               if (target == 4) out[z++] = 255;
+            }
+            stbi__skip(s, pad);
+         }
+      }
+   } else {
+      int rshift=0,gshift=0,bshift=0,ashift=0,rcount=0,gcount=0,bcount=0,acount=0;
+      int z = 0;
+      int easy=0;
+      stbi__skip(s, info.offset - info.extra_read - info.hsz);
+      if (info.bpp == 24) width = 3 * s->img_x;
+      else if (info.bpp == 16) width = 2*s->img_x;
+      else /* bpp = 32 and pad = 0 */ width=0;
+      pad = (-width) & 3;
+      if (info.bpp == 24) {
+         easy = 1;
+      } else if (info.bpp == 32) {
+         if (mb == 0xff && mg == 0xff00 && mr == 0x00ff0000 && ma == 0xff000000)
+            easy = 2;
+      }
+      if (!easy) {
+         if (!mr || !mg || !mb) { STBI_FREE(out); return stbi__errpuc("bad masks", "Corrupt BMP"); }
+         // right shift amt to put high bit in position #7
+         rshift = stbi__high_bit(mr)-7; rcount = stbi__bitcount(mr);
+         gshift = stbi__high_bit(mg)-7; gcount = stbi__bitcount(mg);
+         bshift = stbi__high_bit(mb)-7; bcount = stbi__bitcount(mb);
+         ashift = stbi__high_bit(ma)-7; acount = stbi__bitcount(ma);
+         if (rcount > 8 || gcount > 8 || bcount > 8 || acount > 8) { STBI_FREE(out); return stbi__errpuc("bad masks", "Corrupt BMP"); }
+      }
+      for (j=0; j < (int) s->img_y; ++j) {
+         if (easy) {
+            for (i=0; i < (int) s->img_x; ++i) {
+               unsigned char a;
+               out[z+2] = stbi__get8(s);
+               out[z+1] = stbi__get8(s);
+               out[z+0] = stbi__get8(s);
+               z += 3;
+               a = (easy == 2 ? stbi__get8(s) : 255);
+               all_a |= a;
+               if (target == 4) out[z++] = a;
+            }
+         } else {
+            int bpp = info.bpp;
+            for (i=0; i < (int) s->img_x; ++i) {
+               stbi__uint32 v = (bpp == 16 ? (stbi__uint32) stbi__get16le(s) : stbi__get32le(s));
+               unsigned int a;
+               out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mr, rshift, rcount));
+               out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mg, gshift, gcount));
+               out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mb, bshift, bcount));
+               a = (ma ? stbi__shiftsigned(v & ma, ashift, acount) : 255);
+               all_a |= a;
+               if (target == 4) out[z++] = STBI__BYTECAST(a);
+            }
+         }
+         stbi__skip(s, pad);
+      }
+   }
+
+   // if alpha channel is all 0s, replace with all 255s
+   if (target == 4 && all_a == 0)
+      for (i=4*s->img_x*s->img_y-1; i >= 0; i -= 4)
+         out[i] = 255;
+
+   if (flip_vertically) {
+      stbi_uc t;
+      for (j=0; j < (int) s->img_y>>1; ++j) {
+         stbi_uc *p1 = out +      j     *s->img_x*target;
+         stbi_uc *p2 = out + (s->img_y-1-j)*s->img_x*target;
+         for (i=0; i < (int) s->img_x*target; ++i) {
+            t = p1[i]; p1[i] = p2[i]; p2[i] = t;
+         }
+      }
+   }
+
+   if (req_comp && req_comp != target) {
+      out = stbi__convert_format(out, target, req_comp, s->img_x, s->img_y);
+      if (out == NULL) return out; // stbi__convert_format frees input on failure
+   }
+
+   *x = s->img_x;
+   *y = s->img_y;
+   if (comp) *comp = s->img_n;
+   return out;
+}
+#endif
+
+// Targa Truevision - TGA
+// by Jonathan Dummer
+#ifndef STBI_NO_TGA
+// returns STBI_rgb or whatever, 0 on error
+static int stbi__tga_get_comp(int bits_per_pixel, int is_grey, int* is_rgb16)
+{
+   // only RGB or RGBA (incl. 16bit) or grey allowed
+   if (is_rgb16) *is_rgb16 = 0;
+   switch(bits_per_pixel) {
+      case 8:  return STBI_grey;
+      case 16: if(is_grey) return STBI_grey_alpha;
+               // fallthrough
+      case 15: if(is_rgb16) *is_rgb16 = 1;
+               return STBI_rgb;
+      case 24: // fallthrough
+      case 32: return bits_per_pixel/8;
+      default: return 0;
+   }
+}
+
+static int stbi__tga_info(stbi__context *s, int *x, int *y, int *comp)
+{
+    int tga_w, tga_h, tga_comp, tga_image_type, tga_bits_per_pixel, tga_colormap_bpp;
+    int sz, tga_colormap_type;
+    stbi__get8(s);                   // discard Offset
+    tga_colormap_type = stbi__get8(s); // colormap type
+    if( tga_colormap_type > 1 ) {
+        stbi__rewind(s);
+        return 0;      // only RGB or indexed allowed
+    }
+    tga_image_type = stbi__get8(s); // image type
+    if ( tga_colormap_type == 1 ) { // colormapped (paletted) image
+        if (tga_image_type != 1 && tga_image_type != 9) {
+            stbi__rewind(s);
+            return 0;
+        }
+        stbi__skip(s,4);       // skip index of first colormap entry and number of entries
+        sz = stbi__get8(s);    //   check bits per palette color entry
+        if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) {
+            stbi__rewind(s);
+            return 0;
+        }
+        stbi__skip(s,4);       // skip image x and y origin
+        tga_colormap_bpp = sz;
+    } else { // "normal" image w/o colormap - only RGB or grey allowed, +/- RLE
+        if ( (tga_image_type != 2) && (tga_image_type != 3) && (tga_image_type != 10) && (tga_image_type != 11) ) {
+            stbi__rewind(s);
+            return 0; // only RGB or grey allowed, +/- RLE
+        }
+        stbi__skip(s,9); // skip colormap specification and image x/y origin
+        tga_colormap_bpp = 0;
+    }
+    tga_w = stbi__get16le(s);
+    if( tga_w < 1 ) {
+        stbi__rewind(s);
+        return 0;   // test width
+    }
+    tga_h = stbi__get16le(s);
+    if( tga_h < 1 ) {
+        stbi__rewind(s);
+        return 0;   // test height
+    }
+    tga_bits_per_pixel = stbi__get8(s); // bits per pixel
+    stbi__get8(s); // ignore alpha bits
+    if (tga_colormap_bpp != 0) {
+        if((tga_bits_per_pixel != 8) && (tga_bits_per_pixel != 16)) {
+            // when using a colormap, tga_bits_per_pixel is the size of the indexes
+            // I don't think anything but 8 or 16bit indexes makes sense
+            stbi__rewind(s);
+            return 0;
+        }
+        tga_comp = stbi__tga_get_comp(tga_colormap_bpp, 0, NULL);
+    } else {
+        tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3) || (tga_image_type == 11), NULL);
+    }
+    if(!tga_comp) {
+      stbi__rewind(s);
+      return 0;
+    }
+    if (x) *x = tga_w;
+    if (y) *y = tga_h;
+    if (comp) *comp = tga_comp;
+    return 1;                   // seems to have passed everything
+}
+
+static int stbi__tga_test(stbi__context *s)
+{
+   int res = 0;
+   int sz, tga_color_type;
+   stbi__get8(s);      //   discard Offset
+   tga_color_type = stbi__get8(s);   //   color type
+   if ( tga_color_type > 1 ) goto errorEnd;   //   only RGB or indexed allowed
+   sz = stbi__get8(s);   //   image type
+   if ( tga_color_type == 1 ) { // colormapped (paletted) image
+      if (sz != 1 && sz != 9) goto errorEnd; // colortype 1 demands image type 1 or 9
+      stbi__skip(s,4);       // skip index of first colormap entry and number of entries
+      sz = stbi__get8(s);    //   check bits per palette color entry
+      if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) goto errorEnd;
+      stbi__skip(s,4);       // skip image x and y origin
+   } else { // "normal" image w/o colormap
+      if ( (sz != 2) && (sz != 3) && (sz != 10) && (sz != 11) ) goto errorEnd; // only RGB or grey allowed, +/- RLE
+      stbi__skip(s,9); // skip colormap specification and image x/y origin
+   }
+   if ( stbi__get16le(s) < 1 ) goto errorEnd;      //   test width
+   if ( stbi__get16le(s) < 1 ) goto errorEnd;      //   test height
+   sz = stbi__get8(s);   //   bits per pixel
+   if ( (tga_color_type == 1) && (sz != 8) && (sz != 16) ) goto errorEnd; // for colormapped images, bpp is size of an index
+   if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) goto errorEnd;
+
+   res = 1; // if we got this far, everything's good and we can return 1 instead of 0
+
+errorEnd:
+   stbi__rewind(s);
+   return res;
+}
+
+// read 16bit value and convert to 24bit RGB
+static void stbi__tga_read_rgb16(stbi__context *s, stbi_uc* out)
+{
+   stbi__uint16 px = (stbi__uint16)stbi__get16le(s);
+   stbi__uint16 fiveBitMask = 31;
+   // we have 3 channels with 5bits each
+   int r = (px >> 10) & fiveBitMask;
+   int g = (px >> 5) & fiveBitMask;
+   int b = px & fiveBitMask;
+   // Note that this saves the data in RGB(A) order, so it doesn't need to be swapped later
+   out[0] = (stbi_uc)((r * 255)/31);
+   out[1] = (stbi_uc)((g * 255)/31);
+   out[2] = (stbi_uc)((b * 255)/31);
+
+   // some people claim that the most significant bit might be used for alpha
+   // (possibly if an alpha-bit is set in the "image descriptor byte")
+   // but that only made 16bit test images completely translucent..
+   // so let's treat all 15 and 16bit TGAs as RGB with no alpha.
+}
+
+static void *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
+{
+   //   read in the TGA header stuff
+   int tga_offset = stbi__get8(s);
+   int tga_indexed = stbi__get8(s);
+   int tga_image_type = stbi__get8(s);
+   int tga_is_RLE = 0;
+   int tga_palette_start = stbi__get16le(s);
+   int tga_palette_len = stbi__get16le(s);
+   int tga_palette_bits = stbi__get8(s);
+   int tga_x_origin = stbi__get16le(s);
+   int tga_y_origin = stbi__get16le(s);
+   int tga_width = stbi__get16le(s);
+   int tga_height = stbi__get16le(s);
+   int tga_bits_per_pixel = stbi__get8(s);
+   int tga_comp, tga_rgb16=0;
+   int tga_inverted = stbi__get8(s);
+   // int tga_alpha_bits = tga_inverted & 15; // the 4 lowest bits - unused (useless?)
+   //   image data
+   unsigned char *tga_data;
+   unsigned char *tga_palette = NULL;
+   int i, j;
+   unsigned char raw_data[4] = {0};
+   int RLE_count = 0;
+   int RLE_repeating = 0;
+   int read_next_pixel = 1;
+   STBI_NOTUSED(ri);
+   STBI_NOTUSED(tga_x_origin); // @TODO
+   STBI_NOTUSED(tga_y_origin); // @TODO
+
+   if (tga_height > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
+   if (tga_width > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
+
+   //   do a tiny bit of precessing
+   if ( tga_image_type >= 8 )
+   {
+      tga_image_type -= 8;
+      tga_is_RLE = 1;
+   }
+   tga_inverted = 1 - ((tga_inverted >> 5) & 1);
+
+   //   If I'm paletted, then I'll use the number of bits from the palette
+   if ( tga_indexed ) tga_comp = stbi__tga_get_comp(tga_palette_bits, 0, &tga_rgb16);
+   else tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3), &tga_rgb16);
+
+   if(!tga_comp) // shouldn't really happen, stbi__tga_test() should have ensured basic consistency
+      return stbi__errpuc("bad format", "Can't find out TGA pixelformat");
+
+   //   tga info
+   *x = tga_width;
+   *y = tga_height;
+   if (comp) *comp = tga_comp;
+
+   if (!stbi__mad3sizes_valid(tga_width, tga_height, tga_comp, 0))
+      return stbi__errpuc("too large", "Corrupt TGA");
+
+   tga_data = (unsigned char*)stbi__malloc_mad3(tga_width, tga_height, tga_comp, 0);
+   if (!tga_data) return stbi__errpuc("outofmem", "Out of memory");
+
+   // skip to the data's starting position (offset usually = 0)
+   stbi__skip(s, tga_offset );
+
+   if ( !tga_indexed && !tga_is_RLE && !tga_rgb16 ) {
+      for (i=0; i < tga_height; ++i) {
+         int row = tga_inverted ? tga_height -i - 1 : i;
+         stbi_uc *tga_row = tga_data + row*tga_width*tga_comp;
+         stbi__getn(s, tga_row, tga_width * tga_comp);
+      }
+   } else  {
+      //   do I need to load a palette?
+      if ( tga_indexed)
+      {
+         if (tga_palette_len == 0) {  /* you have to have at least one entry! */
+            STBI_FREE(tga_data);
+            return stbi__errpuc("bad palette", "Corrupt TGA");
+         }
+
+         //   any data to skip? (offset usually = 0)
+         stbi__skip(s, tga_palette_start );
+         //   load the palette
+         tga_palette = (unsigned char*)stbi__malloc_mad2(tga_palette_len, tga_comp, 0);
+         if (!tga_palette) {
+            STBI_FREE(tga_data);
+            return stbi__errpuc("outofmem", "Out of memory");
+         }
+         if (tga_rgb16) {
+            stbi_uc *pal_entry = tga_palette;
+            STBI_ASSERT(tga_comp == STBI_rgb);
+            for (i=0; i < tga_palette_len; ++i) {
+               stbi__tga_read_rgb16(s, pal_entry);
+               pal_entry += tga_comp;
+            }
+         } else if (!stbi__getn(s, tga_palette, tga_palette_len * tga_comp)) {
+               STBI_FREE(tga_data);
+               STBI_FREE(tga_palette);
+               return stbi__errpuc("bad palette", "Corrupt TGA");
+         }
+      }
+      //   load the data
+      for (i=0; i < tga_width * tga_height; ++i)
+      {
+         //   if I'm in RLE mode, do I need to get a RLE stbi__pngchunk?
+         if ( tga_is_RLE )
+         {
+            if ( RLE_count == 0 )
+            {
+               //   yep, get the next byte as a RLE command
+               int RLE_cmd = stbi__get8(s);
+               RLE_count = 1 + (RLE_cmd & 127);
+               RLE_repeating = RLE_cmd >> 7;
+               read_next_pixel = 1;
+            } else if ( !RLE_repeating )
+            {
+               read_next_pixel = 1;
+            }
+         } else
+         {
+            read_next_pixel = 1;
+         }
+         //   OK, if I need to read a pixel, do it now
+         if ( read_next_pixel )
+         {
+            //   load however much data we did have
+            if ( tga_indexed )
+            {
+               // read in index, then perform the lookup
+               int pal_idx = (tga_bits_per_pixel == 8) ? stbi__get8(s) : stbi__get16le(s);
+               if ( pal_idx >= tga_palette_len ) {
+                  // invalid index
+                  pal_idx = 0;
+               }
+               pal_idx *= tga_comp;
+               for (j = 0; j < tga_comp; ++j) {
+                  raw_data[j] = tga_palette[pal_idx+j];
+               }
+            } else if(tga_rgb16) {
+               STBI_ASSERT(tga_comp == STBI_rgb);
+               stbi__tga_read_rgb16(s, raw_data);
+            } else {
+               //   read in the data raw
+               for (j = 0; j < tga_comp; ++j) {
+                  raw_data[j] = stbi__get8(s);
+               }
+            }
+            //   clear the reading flag for the next pixel
+            read_next_pixel = 0;
+         } // end of reading a pixel
+
+         // copy data
+         for (j = 0; j < tga_comp; ++j)
+           tga_data[i*tga_comp+j] = raw_data[j];
+
+         //   in case we're in RLE mode, keep counting down
+         --RLE_count;
+      }
+      //   do I need to invert the image?
+      if ( tga_inverted )
+      {
+         for (j = 0; j*2 < tga_height; ++j)
+         {
+            int index1 = j * tga_width * tga_comp;
+            int index2 = (tga_height - 1 - j) * tga_width * tga_comp;
+            for (i = tga_width * tga_comp; i > 0; --i)
+            {
+               unsigned char temp = tga_data[index1];
+               tga_data[index1] = tga_data[index2];
+               tga_data[index2] = temp;
+               ++index1;
+               ++index2;
+            }
+         }
+      }
+      //   clear my palette, if I had one
+      if ( tga_palette != NULL )
+      {
+         STBI_FREE( tga_palette );
+      }
+   }
+
+   // swap RGB - if the source data was RGB16, it already is in the right order
+   if (tga_comp >= 3 && !tga_rgb16)
+   {
+      unsigned char* tga_pixel = tga_data;
+      for (i=0; i < tga_width * tga_height; ++i)
+      {
+         unsigned char temp = tga_pixel[0];
+         tga_pixel[0] = tga_pixel[2];
+         tga_pixel[2] = temp;
+         tga_pixel += tga_comp;
+      }
+   }
+
+   // convert to target component count
+   if (req_comp && req_comp != tga_comp)
+      tga_data = stbi__convert_format(tga_data, tga_comp, req_comp, tga_width, tga_height);
+
+   //   the things I do to get rid of an error message, and yet keep
+   //   Microsoft's C compilers happy... [8^(
+   tga_palette_start = tga_palette_len = tga_palette_bits =
+         tga_x_origin = tga_y_origin = 0;
+   STBI_NOTUSED(tga_palette_start);
+   //   OK, done
+   return tga_data;
+}
+#endif
+
+// *************************************************************************************************
+// Photoshop PSD loader -- PD by Thatcher Ulrich, integration by Nicolas Schulz, tweaked by STB
+
+#ifndef STBI_NO_PSD
+static int stbi__psd_test(stbi__context *s)
+{
+   int r = (stbi__get32be(s) == 0x38425053);
+   stbi__rewind(s);
+   return r;
+}
+
+static int stbi__psd_decode_rle(stbi__context *s, stbi_uc *p, int pixelCount)
+{
+   int count, nleft, len;
+
+   count = 0;
+   while ((nleft = pixelCount - count) > 0) {
+      len = stbi__get8(s);
+      if (len == 128) {
+         // No-op.
+      } else if (len < 128) {
+         // Copy next len+1 bytes literally.
+         len++;
+         if (len > nleft) return 0; // corrupt data
+         count += len;
+         while (len) {
+            *p = stbi__get8(s);
+            p += 4;
+            len--;
+         }
+      } else if (len > 128) {
+         stbi_uc   val;
+         // Next -len+1 bytes in the dest are replicated from next source byte.
+         // (Interpret len as a negative 8-bit int.)
+         len = 257 - len;
+         if (len > nleft) return 0; // corrupt data
+         val = stbi__get8(s);
+         count += len;
+         while (len) {
+            *p = val;
+            p += 4;
+            len--;
+         }
+      }
+   }
+
+   return 1;
+}
+
+static void *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc)
+{
+   int pixelCount;
+   int channelCount, compression;
+   int channel, i;
+   int bitdepth;
+   int w,h;
+   stbi_uc *out;
+   STBI_NOTUSED(ri);
+
+   // Check identifier
+   if (stbi__get32be(s) != 0x38425053)   // "8BPS"
+      return stbi__errpuc("not PSD", "Corrupt PSD image");
+
+   // Check file type version.
+   if (stbi__get16be(s) != 1)
+      return stbi__errpuc("wrong version", "Unsupported version of PSD image");
+
+   // Skip 6 reserved bytes.
+   stbi__skip(s, 6 );
+
+   // Read the number of channels (R, G, B, A, etc).
+   channelCount = stbi__get16be(s);
+   if (channelCount < 0 || channelCount > 16)
+      return stbi__errpuc("wrong channel count", "Unsupported number of channels in PSD image");
+
+   // Read the rows and columns of the image.
+   h = stbi__get32be(s);
+   w = stbi__get32be(s);
+
+   if (h > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
+   if (w > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
+
+   // Make sure the depth is 8 bits.
+   bitdepth = stbi__get16be(s);
+   if (bitdepth != 8 && bitdepth != 16)
+      return stbi__errpuc("unsupported bit depth", "PSD bit depth is not 8 or 16 bit");
+
+   // Make sure the color mode is RGB.
+   // Valid options are:
+   //   0: Bitmap
+   //   1: Grayscale
+   //   2: Indexed color
+   //   3: RGB color
+   //   4: CMYK color
+   //   7: Multichannel
+   //   8: Duotone
+   //   9: Lab color
+   if (stbi__get16be(s) != 3)
+      return stbi__errpuc("wrong color format", "PSD is not in RGB color format");
+
+   // Skip the Mode Data.  (It's the palette for indexed color; other info for other modes.)
+   stbi__skip(s,stbi__get32be(s) );
+
+   // Skip the image resources.  (resolution, pen tool paths, etc)
+   stbi__skip(s, stbi__get32be(s) );
+
+   // Skip the reserved data.
+   stbi__skip(s, stbi__get32be(s) );
+
+   // Find out if the data is compressed.
+   // Known values:
+   //   0: no compression
+   //   1: RLE compressed
+   compression = stbi__get16be(s);
+   if (compression > 1)
+      return stbi__errpuc("bad compression", "PSD has an unknown compression format");
+
+   // Check size
+   if (!stbi__mad3sizes_valid(4, w, h, 0))
+      return stbi__errpuc("too large", "Corrupt PSD");
+
+   // Create the destination image.
+
+   if (!compression && bitdepth == 16 && bpc == 16) {
+      out = (stbi_uc *) stbi__malloc_mad3(8, w, h, 0);
+      ri->bits_per_channel = 16;
+   } else
+      out = (stbi_uc *) stbi__malloc(4 * w*h);
+
+   if (!out) return stbi__errpuc("outofmem", "Out of memory");
+   pixelCount = w*h;
+
+   // Initialize the data to zero.
+   //memset( out, 0, pixelCount * 4 );
+
+   // Finally, the image data.
+   if (compression) {
+      // RLE as used by .PSD and .TIFF
+      // Loop until you get the number of unpacked bytes you are expecting:
+      //     Read the next source byte into n.
+      //     If n is between 0 and 127 inclusive, copy the next n+1 bytes literally.
+      //     Else if n is between -127 and -1 inclusive, copy the next byte -n+1 times.
+      //     Else if n is 128, noop.
+      // Endloop
+
+      // The RLE-compressed data is preceded by a 2-byte data count for each row in the data,
+      // which we're going to just skip.
+      stbi__skip(s, h * channelCount * 2 );
+
+      // Read the RLE data by channel.
+      for (channel = 0; channel < 4; channel++) {
+         stbi_uc *p;
+
+         p = out+channel;
+         if (channel >= channelCount) {
+            // Fill this channel with default data.
+            for (i = 0; i < pixelCount; i++, p += 4)
+               *p = (channel == 3 ? 255 : 0);
+         } else {
+            // Read the RLE data.
+            if (!stbi__psd_decode_rle(s, p, pixelCount)) {
+               STBI_FREE(out);
+               return stbi__errpuc("corrupt", "bad RLE data");
+            }
+         }
+      }
+
+   } else {
+      // We're at the raw image data.  It's each channel in order (Red, Green, Blue, Alpha, ...)
+      // where each channel consists of an 8-bit (or 16-bit) value for each pixel in the image.
+
+      // Read the data by channel.
+      for (channel = 0; channel < 4; channel++) {
+         if (channel >= channelCount) {
+            // Fill this channel with default data.
+            if (bitdepth == 16 && bpc == 16) {
+               stbi__uint16 *q = ((stbi__uint16 *) out) + channel;
+               stbi__uint16 val = channel == 3 ? 65535 : 0;
+               for (i = 0; i < pixelCount; i++, q += 4)
+                  *q = val;
+            } else {
+               stbi_uc *p = out+channel;
+               stbi_uc val = channel == 3 ? 255 : 0;
+               for (i = 0; i < pixelCount; i++, p += 4)
+                  *p = val;
+            }
+         } else {
+            if (ri->bits_per_channel == 16) {    // output bpc
+               stbi__uint16 *q = ((stbi__uint16 *) out) + channel;
+               for (i = 0; i < pixelCount; i++, q += 4)
+                  *q = (stbi__uint16) stbi__get16be(s);
+            } else {
+               stbi_uc *p = out+channel;
+               if (bitdepth == 16) {  // input bpc
+                  for (i = 0; i < pixelCount; i++, p += 4)
+                     *p = (stbi_uc) (stbi__get16be(s) >> 8);
+               } else {
+                  for (i = 0; i < pixelCount; i++, p += 4)
+                     *p = stbi__get8(s);
+               }
+            }
+         }
+      }
+   }
+
+   // remove weird white matte from PSD
+   if (channelCount >= 4) {
+      if (ri->bits_per_channel == 16) {
+         for (i=0; i < w*h; ++i) {
+            stbi__uint16 *pixel = (stbi__uint16 *) out + 4*i;
+            if (pixel[3] != 0 && pixel[3] != 65535) {
+               float a = pixel[3] / 65535.0f;
+               float ra = 1.0f / a;
+               float inv_a = 65535.0f * (1 - ra);
+               pixel[0] = (stbi__uint16) (pixel[0]*ra + inv_a);
+               pixel[1] = (stbi__uint16) (pixel[1]*ra + inv_a);
+               pixel[2] = (stbi__uint16) (pixel[2]*ra + inv_a);
+            }
+         }
+      } else {
+         for (i=0; i < w*h; ++i) {
+            unsigned char *pixel = out + 4*i;
+            if (pixel[3] != 0 && pixel[3] != 255) {
+               float a = pixel[3] / 255.0f;
+               float ra = 1.0f / a;
+               float inv_a = 255.0f * (1 - ra);
+               pixel[0] = (unsigned char) (pixel[0]*ra + inv_a);
+               pixel[1] = (unsigned char) (pixel[1]*ra + inv_a);
+               pixel[2] = (unsigned char) (pixel[2]*ra + inv_a);
+            }
+         }
+      }
+   }
+
+   // convert to desired output format
+   if (req_comp && req_comp != 4) {
+      if (ri->bits_per_channel == 16)
+         out = (stbi_uc *) stbi__convert_format16((stbi__uint16 *) out, 4, req_comp, w, h);
+      else
+         out = stbi__convert_format(out, 4, req_comp, w, h);
+      if (out == NULL) return out; // stbi__convert_format frees input on failure
+   }
+
+   if (comp) *comp = 4;
+   *y = h;
+   *x = w;
+
+   return out;
+}
+#endif
+
+// *************************************************************************************************
+// Softimage PIC loader
+// by Tom Seddon
+//
+// See http://softimage.wiki.softimage.com/index.php/INFO:_PIC_file_format
+// See http://ozviz.wasp.uwa.edu.au/~pbourke/dataformats/softimagepic/
+
+#ifndef STBI_NO_PIC
+static int stbi__pic_is4(stbi__context *s,const char *str)
+{
+   int i;
+   for (i=0; i<4; ++i)
+      if (stbi__get8(s) != (stbi_uc)str[i])
+         return 0;
+
+   return 1;
+}
+
+static int stbi__pic_test_core(stbi__context *s)
+{
+   int i;
+
+   if (!stbi__pic_is4(s,"\x53\x80\xF6\x34"))
+      return 0;
+
+   for(i=0;i<84;++i)
+      stbi__get8(s);
+
+   if (!stbi__pic_is4(s,"PICT"))
+      return 0;
+
+   return 1;
+}
+
+typedef struct
+{
+   stbi_uc size,type,channel;
+} stbi__pic_packet;
+
+static stbi_uc *stbi__readval(stbi__context *s, int channel, stbi_uc *dest)
+{
+   int mask=0x80, i;
+
+   for (i=0; i<4; ++i, mask>>=1) {
+      if (channel & mask) {
+         if (stbi__at_eof(s)) return stbi__errpuc("bad file","PIC file too short");
+         dest[i]=stbi__get8(s);
+      }
+   }
+
+   return dest;
+}
+
+static void stbi__copyval(int channel,stbi_uc *dest,const stbi_uc *src)
+{
+   int mask=0x80,i;
+
+   for (i=0;i<4; ++i, mask>>=1)
+      if (channel&mask)
+         dest[i]=src[i];
+}
+
+static stbi_uc *stbi__pic_load_core(stbi__context *s,int width,int height,int *comp, stbi_uc *result)
+{
+   int act_comp=0,num_packets=0,y,chained;
+   stbi__pic_packet packets[10];
+
+   // this will (should...) cater for even some bizarre stuff like having data
+    // for the same channel in multiple packets.
+   do {
+      stbi__pic_packet *packet;
+
+      if (num_packets==sizeof(packets)/sizeof(packets[0]))
+         return stbi__errpuc("bad format","too many packets");
+
+      packet = &packets[num_packets++];
+
+      chained = stbi__get8(s);
+      packet->size    = stbi__get8(s);
+      packet->type    = stbi__get8(s);
+      packet->channel = stbi__get8(s);
+
+      act_comp |= packet->channel;
+
+      if (stbi__at_eof(s))          return stbi__errpuc("bad file","file too short (reading packets)");
+      if (packet->size != 8)  return stbi__errpuc("bad format","packet isn't 8bpp");
+   } while (chained);
+
+   *comp = (act_comp & 0x10 ? 4 : 3); // has alpha channel?
+
+   for(y=0; y<height; ++y) {
+      int packet_idx;
+
+      for(packet_idx=0; packet_idx < num_packets; ++packet_idx) {
+         stbi__pic_packet *packet = &packets[packet_idx];
+         stbi_uc *dest = result+y*width*4;
+
+         switch (packet->type) {
+            default:
+               return stbi__errpuc("bad format","packet has bad compression type");
+
+            case 0: {//uncompressed
+               int x;
+
+               for(x=0;x<width;++x, dest+=4)
+                  if (!stbi__readval(s,packet->channel,dest))
+                     return 0;
+               break;
+            }
+
+            case 1://Pure RLE
+               {
+                  int left=width, i;
+
+                  while (left>0) {
+                     stbi_uc count,value[4];
+
+                     count=stbi__get8(s);
+                     if (stbi__at_eof(s))   return stbi__errpuc("bad file","file too short (pure read count)");
+
+                     if (count > left)
+                        count = (stbi_uc) left;
+
+                     if (!stbi__readval(s,packet->channel,value))  return 0;
+
+                     for(i=0; i<count; ++i,dest+=4)
+                        stbi__copyval(packet->channel,dest,value);
+                     left -= count;
+                  }
+               }
+               break;
+
+            case 2: {//Mixed RLE
+               int left=width;
+               while (left>0) {
+                  int count = stbi__get8(s), i;
+                  if (stbi__at_eof(s))  return stbi__errpuc("bad file","file too short (mixed read count)");
+
+                  if (count >= 128) { // Repeated
+                     stbi_uc value[4];
+
+                     if (count==128)
+                        count = stbi__get16be(s);
+                     else
+                        count -= 127;
+                     if (count > left)
+                        return stbi__errpuc("bad file","scanline overrun");
+
+                     if (!stbi__readval(s,packet->channel,value))
+                        return 0;
+
+                     for(i=0;i<count;++i, dest += 4)
+                        stbi__copyval(packet->channel,dest,value);
+                  } else { // Raw
+                     ++count;
+                     if (count>left) return stbi__errpuc("bad file","scanline overrun");
+
+                     for(i=0;i<count;++i, dest+=4)
+                        if (!stbi__readval(s,packet->channel,dest))
+                           return 0;
+                  }
+                  left-=count;
+               }
+               break;
+            }
+         }
+      }
+   }
+
+   return result;
+}
+
+static void *stbi__pic_load(stbi__context *s,int *px,int *py,int *comp,int req_comp, stbi__result_info *ri)
+{
+   stbi_uc *result;
+   int i, x,y, internal_comp;
+   STBI_NOTUSED(ri);
+
+   if (!comp) comp = &internal_comp;
+
+   for (i=0; i<92; ++i)
+      stbi__get8(s);
+
+   x = stbi__get16be(s);
+   y = stbi__get16be(s);
+
+   if (y > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
+   if (x > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
+
+   if (stbi__at_eof(s))  return stbi__errpuc("bad file","file too short (pic header)");
+   if (!stbi__mad3sizes_valid(x, y, 4, 0)) return stbi__errpuc("too large", "PIC image too large to decode");
+
+   stbi__get32be(s); //skip `ratio'
+   stbi__get16be(s); //skip `fields'
+   stbi__get16be(s); //skip `pad'
+
+   // intermediate buffer is RGBA
+   result = (stbi_uc *) stbi__malloc_mad3(x, y, 4, 0);
+   memset(result, 0xff, x*y*4);
+
+   if (!stbi__pic_load_core(s,x,y,comp, result)) {
+      STBI_FREE(result);
+      result=0;
+   }
+   *px = x;
+   *py = y;
+   if (req_comp == 0) req_comp = *comp;
+   result=stbi__convert_format(result,4,req_comp,x,y);
+
+   return result;
+}
+
+static int stbi__pic_test(stbi__context *s)
+{
+   int r = stbi__pic_test_core(s);
+   stbi__rewind(s);
+   return r;
+}
+#endif
+
+// *************************************************************************************************
+// GIF loader -- public domain by Jean-Marc Lienher -- simplified/shrunk by stb
+
+#ifndef STBI_NO_GIF
+typedef struct
+{
+   stbi__int16 prefix;
+   stbi_uc first;
+   stbi_uc suffix;
+} stbi__gif_lzw;
+
+typedef struct
+{
+   int w,h;
+   stbi_uc *out;                 // output buffer (always 4 components)
+   stbi_uc *background;          // The current "background" as far as a gif is concerned
+   stbi_uc *history;
+   int flags, bgindex, ratio, transparent, eflags;
+   stbi_uc  pal[256][4];
+   stbi_uc lpal[256][4];
+   stbi__gif_lzw codes[8192];
+   stbi_uc *color_table;
+   int parse, step;
+   int lflags;
+   int start_x, start_y;
+   int max_x, max_y;
+   int cur_x, cur_y;
+   int line_size;
+   int delay;
+} stbi__gif;
+
+static int stbi__gif_test_raw(stbi__context *s)
+{
+   int sz;
+   if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8') return 0;
+   sz = stbi__get8(s);
+   if (sz != '9' && sz != '7') return 0;
+   if (stbi__get8(s) != 'a') return 0;
+   return 1;
+}
+
+static int stbi__gif_test(stbi__context *s)
+{
+   int r = stbi__gif_test_raw(s);
+   stbi__rewind(s);
+   return r;
+}
+
+static void stbi__gif_parse_colortable(stbi__context *s, stbi_uc pal[256][4], int num_entries, int transp)
+{
+   int i;
+   for (i=0; i < num_entries; ++i) {
+      pal[i][2] = stbi__get8(s);
+      pal[i][1] = stbi__get8(s);
+      pal[i][0] = stbi__get8(s);
+      pal[i][3] = transp == i ? 0 : 255;
+   }
+}
+
+static int stbi__gif_header(stbi__context *s, stbi__gif *g, int *comp, int is_info)
+{
+   stbi_uc version;
+   if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8')
+      return stbi__err("not GIF", "Corrupt GIF");
+
+   version = stbi__get8(s);
+   if (version != '7' && version != '9')    return stbi__err("not GIF", "Corrupt GIF");
+   if (stbi__get8(s) != 'a')                return stbi__err("not GIF", "Corrupt GIF");
+
+   stbi__g_failure_reason = "";
+   g->w = stbi__get16le(s);
+   g->h = stbi__get16le(s);
+   g->flags = stbi__get8(s);
+   g->bgindex = stbi__get8(s);
+   g->ratio = stbi__get8(s);
+   g->transparent = -1;
+
+   if (g->w > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)");
+   if (g->h > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)");
+
+   if (comp != 0) *comp = 4;  // can't actually tell whether it's 3 or 4 until we parse the comments
+
+   if (is_info) return 1;
+
+   if (g->flags & 0x80)
+      stbi__gif_parse_colortable(s,g->pal, 2 << (g->flags & 7), -1);
+
+   return 1;
+}
+
+static int stbi__gif_info_raw(stbi__context *s, int *x, int *y, int *comp)
+{
+   stbi__gif* g = (stbi__gif*) stbi__malloc(sizeof(stbi__gif));
+   if (!stbi__gif_header(s, g, comp, 1)) {
+      STBI_FREE(g);
+      stbi__rewind( s );
+      return 0;
+   }
+   if (x) *x = g->w;
+   if (y) *y = g->h;
+   STBI_FREE(g);
+   return 1;
+}
+
+static void stbi__out_gif_code(stbi__gif *g, stbi__uint16 code)
+{
+   stbi_uc *p, *c;
+   int idx;
+
+   // recurse to decode the prefixes, since the linked-list is backwards,
+   // and working backwards through an interleaved image would be nasty
+   if (g->codes[code].prefix >= 0)
+      stbi__out_gif_code(g, g->codes[code].prefix);
+
+   if (g->cur_y >= g->max_y) return;
+
+   idx = g->cur_x + g->cur_y;
+   p = &g->out[idx];
+   g->history[idx / 4] = 1;
+
+   c = &g->color_table[g->codes[code].suffix * 4];
+   if (c[3] > 128) { // don't render transparent pixels;
+      p[0] = c[2];
+      p[1] = c[1];
+      p[2] = c[0];
+      p[3] = c[3];
+   }
+   g->cur_x += 4;
+
+   if (g->cur_x >= g->max_x) {
+      g->cur_x = g->start_x;
+      g->cur_y += g->step;
+
+      while (g->cur_y >= g->max_y && g->parse > 0) {
+         g->step = (1 << g->parse) * g->line_size;
+         g->cur_y = g->start_y + (g->step >> 1);
+         --g->parse;
+      }
+   }
+}
+
+static stbi_uc *stbi__process_gif_raster(stbi__context *s, stbi__gif *g)
+{
+   stbi_uc lzw_cs;
+   stbi__int32 len, init_code;
+   stbi__uint32 first;
+   stbi__int32 codesize, codemask, avail, oldcode, bits, valid_bits, clear;
+   stbi__gif_lzw *p;
+
+   lzw_cs = stbi__get8(s);
+   if (lzw_cs > 12) return NULL;
+   clear = 1 << lzw_cs;
+   first = 1;
+   codesize = lzw_cs + 1;
+   codemask = (1 << codesize) - 1;
+   bits = 0;
+   valid_bits = 0;
+   for (init_code = 0; init_code < clear; init_code++) {
+      g->codes[init_code].prefix = -1;
+      g->codes[init_code].first = (stbi_uc) init_code;
+      g->codes[init_code].suffix = (stbi_uc) init_code;
+   }
+
+   // support no starting clear code
+   avail = clear+2;
+   oldcode = -1;
+
+   len = 0;
+   for(;;) {
+      if (valid_bits < codesize) {
+         if (len == 0) {
+            len = stbi__get8(s); // start new block
+            if (len == 0)
+               return g->out;
+         }
+         --len;
+         bits |= (stbi__int32) stbi__get8(s) << valid_bits;
+         valid_bits += 8;
+      } else {
+         stbi__int32 code = bits & codemask;
+         bits >>= codesize;
+         valid_bits -= codesize;
+         // @OPTIMIZE: is there some way we can accelerate the non-clear path?
+         if (code == clear) {  // clear code
+            codesize = lzw_cs + 1;
+            codemask = (1 << codesize) - 1;
+            avail = clear + 2;
+            oldcode = -1;
+            first = 0;
+         } else if (code == clear + 1) { // end of stream code
+            stbi__skip(s, len);
+            while ((len = stbi__get8(s)) > 0)
+               stbi__skip(s,len);
+            return g->out;
+         } else if (code <= avail) {
+            if (first) {
+               return stbi__errpuc("no clear code", "Corrupt GIF");
+            }
+
+            if (oldcode >= 0) {
+               p = &g->codes[avail++];
+               if (avail > 8192) {
+                  return stbi__errpuc("too many codes", "Corrupt GIF");
+               }
+
+               p->prefix = (stbi__int16) oldcode;
+               p->first = g->codes[oldcode].first;
+               p->suffix = (code == avail) ? p->first : g->codes[code].first;
+            } else if (code == avail)
+               return stbi__errpuc("illegal code in raster", "Corrupt GIF");
+
+            stbi__out_gif_code(g, (stbi__uint16) code);
+
+            if ((avail & codemask) == 0 && avail <= 0x0FFF) {
+               codesize++;
+               codemask = (1 << codesize) - 1;
+            }
+
+            oldcode = code;
+         } else {
+            return stbi__errpuc("illegal code in raster", "Corrupt GIF");
+         }
+      }
+   }
+}
+
+// this function is designed to support animated gifs, although stb_image doesn't support it
+// two back is the image from two frames ago, used for a very specific disposal format
+static stbi_uc *stbi__gif_load_next(stbi__context *s, stbi__gif *g, int *comp, int req_comp, stbi_uc *two_back)
+{
+   int dispose;
+   int first_frame;
+   int pi;
+   int pcount;
+   STBI_NOTUSED(req_comp);
+
+   // on first frame, any non-written pixels get the background colour (non-transparent)
+   first_frame = 0;
+   if (g->out == 0) {
+      if (!stbi__gif_header(s, g, comp,0)) return 0; // stbi__g_failure_reason set by stbi__gif_header
+      if (!stbi__mad3sizes_valid(4, g->w, g->h, 0))
+         return stbi__errpuc("too large", "GIF image is too large");
+      pcount = g->w * g->h;
+      g->out = (stbi_uc *) stbi__malloc(4 * pcount);
+      g->background = (stbi_uc *) stbi__malloc(4 * pcount);
+      g->history = (stbi_uc *) stbi__malloc(pcount);
+      if (!g->out || !g->background || !g->history)
+         return stbi__errpuc("outofmem", "Out of memory");
+
+      // image is treated as "transparent" at the start - ie, nothing overwrites the current background;
+      // background colour is only used for pixels that are not rendered first frame, after that "background"
+      // color refers to the color that was there the previous frame.
+      memset(g->out, 0x00, 4 * pcount);
+      memset(g->background, 0x00, 4 * pcount); // state of the background (starts transparent)
+      memset(g->history, 0x00, pcount);        // pixels that were affected previous frame
+      first_frame = 1;
+   } else {
+      // second frame - how do we dispose of the previous one?
+      dispose = (g->eflags & 0x1C) >> 2;
+      pcount = g->w * g->h;
+
+      if ((dispose == 3) && (two_back == 0)) {
+         dispose = 2; // if I don't have an image to revert back to, default to the old background
+      }
+
+      if (dispose == 3) { // use previous graphic
+         for (pi = 0; pi < pcount; ++pi) {
+            if (g->history[pi]) {
+               memcpy( &g->out[pi * 4], &two_back[pi * 4], 4 );
+            }
+         }
+      } else if (dispose == 2) {
+         // restore what was changed last frame to background before that frame;
+         for (pi = 0; pi < pcount; ++pi) {
+            if (g->history[pi]) {
+               memcpy( &g->out[pi * 4], &g->background[pi * 4], 4 );
+            }
+         }
+      } else {
+         // This is a non-disposal case eithe way, so just
+         // leave the pixels as is, and they will become the new background
+         // 1: do not dispose
+         // 0:  not specified.
+      }
+
+      // background is what out is after the undoing of the previou frame;
+      memcpy( g->background, g->out, 4 * g->w * g->h );
+   }
+
+   // clear my history;
+   memset( g->history, 0x00, g->w * g->h );        // pixels that were affected previous frame
+
+   for (;;) {
+      int tag = stbi__get8(s);
+      switch (tag) {
+         case 0x2C: /* Image Descriptor */
+         {
+            stbi__int32 x, y, w, h;
+            stbi_uc *o;
+
+            x = stbi__get16le(s);
+            y = stbi__get16le(s);
+            w = stbi__get16le(s);
+            h = stbi__get16le(s);
+            if (((x + w) > (g->w)) || ((y + h) > (g->h)))
+               return stbi__errpuc("bad Image Descriptor", "Corrupt GIF");
+
+            g->line_size = g->w * 4;
+            g->start_x = x * 4;
+            g->start_y = y * g->line_size;
+            g->max_x   = g->start_x + w * 4;
+            g->max_y   = g->start_y + h * g->line_size;
+            g->cur_x   = g->start_x;
+            g->cur_y   = g->start_y;
+
+            // if the width of the specified rectangle is 0, that means
+            // we may not see *any* pixels or the image is malformed;
+            // to make sure this is caught, move the current y down to
+            // max_y (which is what out_gif_code checks).
+            if (w == 0)
+               g->cur_y = g->max_y;
+
+            g->lflags = stbi__get8(s);
+
+            if (g->lflags & 0x40) {
+               g->step = 8 * g->line_size; // first interlaced spacing
+               g->parse = 3;
+            } else {
+               g->step = g->line_size;
+               g->parse = 0;
+            }
+
+            if (g->lflags & 0x80) {
+               stbi__gif_parse_colortable(s,g->lpal, 2 << (g->lflags & 7), g->eflags & 0x01 ? g->transparent : -1);
+               g->color_table = (stbi_uc *) g->lpal;
+            } else if (g->flags & 0x80) {
+               g->color_table = (stbi_uc *) g->pal;
+            } else
+               return stbi__errpuc("missing color table", "Corrupt GIF");
+
+            o = stbi__process_gif_raster(s, g);
+            if (!o) return NULL;
+
+            // if this was the first frame,
+            pcount = g->w * g->h;
+            if (first_frame && (g->bgindex > 0)) {
+               // if first frame, any pixel not drawn to gets the background color
+               for (pi = 0; pi < pcount; ++pi) {
+                  if (g->history[pi] == 0) {
+                     g->pal[g->bgindex][3] = 255; // just in case it was made transparent, undo that; It will be reset next frame if need be;
+                     memcpy( &g->out[pi * 4], &g->pal[g->bgindex], 4 );
+                  }
+               }
+            }
+
+            return o;
+         }
+
+         case 0x21: // Comment Extension.
+         {
+            int len;
+            int ext = stbi__get8(s);
+            if (ext == 0xF9) { // Graphic Control Extension.
+               len = stbi__get8(s);
+               if (len == 4) {
+                  g->eflags = stbi__get8(s);
+                  g->delay = 10 * stbi__get16le(s); // delay - 1/100th of a second, saving as 1/1000ths.
+
+                  // unset old transparent
+                  if (g->transparent >= 0) {
+                     g->pal[g->transparent][3] = 255;
+                  }
+                  if (g->eflags & 0x01) {
+                     g->transparent = stbi__get8(s);
+                     if (g->transparent >= 0) {
+                        g->pal[g->transparent][3] = 0;
+                     }
+                  } else {
+                     // don't need transparent
+                     stbi__skip(s, 1);
+                     g->transparent = -1;
+                  }
+               } else {
+                  stbi__skip(s, len);
+                  break;
+               }
+            }
+            while ((len = stbi__get8(s)) != 0) {
+               stbi__skip(s, len);
+            }
+            break;
+         }
+
+         case 0x3B: // gif stream termination code
+            return (stbi_uc *) s; // using '1' causes warning on some compilers
+
+         default:
+            return stbi__errpuc("unknown code", "Corrupt GIF");
+      }
+   }
+}
+
+static void *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
+{
+   if (stbi__gif_test(s)) {
+      int layers = 0;
+      stbi_uc *u = 0;
+      stbi_uc *out = 0;
+      stbi_uc *two_back = 0;
+      stbi__gif g;
+      int stride;
+      int out_size = 0;
+      int delays_size = 0;
+      memset(&g, 0, sizeof(g));
+      if (delays) {
+         *delays = 0;
+      }
+
+      do {
+         u = stbi__gif_load_next(s, &g, comp, req_comp, two_back);
+         if (u == (stbi_uc *) s) u = 0;  // end of animated gif marker
+
+         if (u) {
+            *x = g.w;
+            *y = g.h;
+            ++layers;
+            stride = g.w * g.h * 4;
+
+            if (out) {
+               void *tmp = (stbi_uc*) STBI_REALLOC_SIZED( out, out_size, layers * stride );
+               if (NULL == tmp) {
+                  STBI_FREE(g.out);
+                  STBI_FREE(g.history);
+                  STBI_FREE(g.background);
+                  return stbi__errpuc("outofmem", "Out of memory");
+               }
+               else {
+                   out = (stbi_uc*) tmp;
+                   out_size = layers * stride;
+               }
+
+               if (delays) {
+                  *delays = (int*) STBI_REALLOC_SIZED( *delays, delays_size, sizeof(int) * layers );
+                  delays_size = layers * sizeof(int);
+               }
+            } else {
+               out = (stbi_uc*)stbi__malloc( layers * stride );
+               out_size = layers * stride;
+               if (delays) {
+                  *delays = (int*) stbi__malloc( layers * sizeof(int) );
+                  delays_size = layers * sizeof(int);
+               }
+            }
+            memcpy( out + ((layers - 1) * stride), u, stride );
+            if (layers >= 2) {
+               two_back = out - 2 * stride;
+            }
+
+            if (delays) {
+               (*delays)[layers - 1U] = g.delay;
+            }
+         }
+      } while (u != 0);
+
+      // free temp buffer;
+      STBI_FREE(g.out);
+      STBI_FREE(g.history);
+      STBI_FREE(g.background);
+
+      // do the final conversion after loading everything;
+      if (req_comp && req_comp != 4)
+         out = stbi__convert_format(out, 4, req_comp, layers * g.w, g.h);
+
+      *z = layers;
+      return out;
+   } else {
+      return stbi__errpuc("not GIF", "Image was not as a gif type.");
+   }
+}
+
+static void *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
+{
+   stbi_uc *u = 0;
+   stbi__gif g;
+   memset(&g, 0, sizeof(g));
+   STBI_NOTUSED(ri);
+
+   u = stbi__gif_load_next(s, &g, comp, req_comp, 0);
+   if (u == (stbi_uc *) s) u = 0;  // end of animated gif marker
+   if (u) {
+      *x = g.w;
+      *y = g.h;
+
+      // moved conversion to after successful load so that the same
+      // can be done for multiple frames.
+      if (req_comp && req_comp != 4)
+         u = stbi__convert_format(u, 4, req_comp, g.w, g.h);
+   } else if (g.out) {
+      // if there was an error and we allocated an image buffer, free it!
+      STBI_FREE(g.out);
+   }
+
+   // free buffers needed for multiple frame loading;
+   STBI_FREE(g.history);
+   STBI_FREE(g.background);
+
+   return u;
+}
+
+static int stbi__gif_info(stbi__context *s, int *x, int *y, int *comp)
+{
+   return stbi__gif_info_raw(s,x,y,comp);
+}
+#endif
+
+// *************************************************************************************************
+// Radiance RGBE HDR loader
+// originally by Nicolas Schulz
+#ifndef STBI_NO_HDR
+static int stbi__hdr_test_core(stbi__context *s, const char *signature)
+{
+   int i;
+   for (i=0; signature[i]; ++i)
+      if (stbi__get8(s) != signature[i])
+          return 0;
+   stbi__rewind(s);
+   return 1;
+}
+
+static int stbi__hdr_test(stbi__context* s)
+{
+   int r = stbi__hdr_test_core(s, "#?RADIANCE\n");
+   stbi__rewind(s);
+   if(!r) {
+       r = stbi__hdr_test_core(s, "#?RGBE\n");
+       stbi__rewind(s);
+   }
+   return r;
+}
+
+#define STBI__HDR_BUFLEN  1024
+static char *stbi__hdr_gettoken(stbi__context *z, char *buffer)
+{
+   int len=0;
+   char c = '\0';
+
+   c = (char) stbi__get8(z);
+
+   while (!stbi__at_eof(z) && c != '\n') {
+      buffer[len++] = c;
+      if (len == STBI__HDR_BUFLEN-1) {
+         // flush to end of line
+         while (!stbi__at_eof(z) && stbi__get8(z) != '\n')
+            ;
+         break;
+      }
+      c = (char) stbi__get8(z);
+   }
+
+   buffer[len] = 0;
+   return buffer;
+}
+
+static void stbi__hdr_convert(float *output, stbi_uc *input, int req_comp)
+{
+   if ( input[3] != 0 ) {
+      float f1;
+      // Exponent
+      f1 = (float) ldexp(1.0f, input[3] - (int)(128 + 8));
+      if (req_comp <= 2)
+         output[0] = (input[0] + input[1] + input[2]) * f1 / 3;
+      else {
+         output[0] = input[0] * f1;
+         output[1] = input[1] * f1;
+         output[2] = input[2] * f1;
+      }
+      if (req_comp == 2) output[1] = 1;
+      if (req_comp == 4) output[3] = 1;
+   } else {
+      switch (req_comp) {
+         case 4: output[3] = 1; /* fallthrough */
+         case 3: output[0] = output[1] = output[2] = 0;
+                 break;
+         case 2: output[1] = 1; /* fallthrough */
+         case 1: output[0] = 0;
+                 break;
+      }
+   }
+}
+
+static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
+{
+   char buffer[STBI__HDR_BUFLEN];
+   char *token;
+   int valid = 0;
+   int width, height;
+   stbi_uc *scanline;
+   float *hdr_data;
+   int len;
+   unsigned char count, value;
+   int i, j, k, c1,c2, z;
+   const char *headerToken;
+   STBI_NOTUSED(ri);
+
+   // Check identifier
+   headerToken = stbi__hdr_gettoken(s,buffer);
+   if (strcmp(headerToken, "#?RADIANCE") != 0 && strcmp(headerToken, "#?RGBE") != 0)
+      return stbi__errpf("not HDR", "Corrupt HDR image");
+
+   // Parse header
+   for(;;) {
+      token = stbi__hdr_gettoken(s,buffer);
+      if (token[0] == 0) break;
+      if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1;
+   }
+
+   if (!valid)    return stbi__errpf("unsupported format", "Unsupported HDR format");
+
+   // Parse width and height
+   // can't use sscanf() if we're not using stdio!
+   token = stbi__hdr_gettoken(s,buffer);
+   if (strncmp(token, "-Y ", 3))  return stbi__errpf("unsupported data layout", "Unsupported HDR format");
+   token += 3;
+   height = (int) strtol(token, &token, 10);
+   while (*token == ' ') ++token;
+   if (strncmp(token, "+X ", 3))  return stbi__errpf("unsupported data layout", "Unsupported HDR format");
+   token += 3;
+   width = (int) strtol(token, NULL, 10);
+
+   if (height > STBI_MAX_DIMENSIONS) return stbi__errpf("too large","Very large image (corrupt?)");
+   if (width > STBI_MAX_DIMENSIONS) return stbi__errpf("too large","Very large image (corrupt?)");
+
+   *x = width;
+   *y = height;
+
+   if (comp) *comp = 3;
+   if (req_comp == 0) req_comp = 3;
+
+   if (!stbi__mad4sizes_valid(width, height, req_comp, sizeof(float), 0))
+      return stbi__errpf("too large", "HDR image is too large");
+
+   // Read data
+   hdr_data = (float *) stbi__malloc_mad4(width, height, req_comp, sizeof(float), 0);
+   if (!hdr_data)
+      return stbi__errpf("outofmem", "Out of memory");
+
+   // Load image data
+   // image data is stored as some number of sca
+   if ( width < 8 || width >= 32768) {
+      // Read flat data
+      for (j=0; j < height; ++j) {
+         for (i=0; i < width; ++i) {
+            stbi_uc rgbe[4];
+           main_decode_loop:
+            stbi__getn(s, rgbe, 4);
+            stbi__hdr_convert(hdr_data + j * width * req_comp + i * req_comp, rgbe, req_comp);
+         }
+      }
+   } else {
+      // Read RLE-encoded data
+      scanline = NULL;
+
+      for (j = 0; j < height; ++j) {
+         c1 = stbi__get8(s);
+         c2 = stbi__get8(s);
+         len = stbi__get8(s);
+         if (c1 != 2 || c2 != 2 || (len & 0x80)) {
+            // not run-length encoded, so we have to actually use THIS data as a decoded
+            // pixel (note this can't be a valid pixel--one of RGB must be >= 128)
+            stbi_uc rgbe[4];
+            rgbe[0] = (stbi_uc) c1;
+            rgbe[1] = (stbi_uc) c2;
+            rgbe[2] = (stbi_uc) len;
+            rgbe[3] = (stbi_uc) stbi__get8(s);
+            stbi__hdr_convert(hdr_data, rgbe, req_comp);
+            i = 1;
+            j = 0;
+            STBI_FREE(scanline);
+            goto main_decode_loop; // yes, this makes no sense
+         }
+         len <<= 8;
+         len |= stbi__get8(s);
+         if (len != width) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("invalid decoded scanline length", "corrupt HDR"); }
+         if (scanline == NULL) {
+            scanline = (stbi_uc *) stbi__malloc_mad2(width, 4, 0);
+            if (!scanline) {
+               STBI_FREE(hdr_data);
+               return stbi__errpf("outofmem", "Out of memory");
+            }
+         }
+
+         for (k = 0; k < 4; ++k) {
+            int nleft;
+            i = 0;
+            while ((nleft = width - i) > 0) {
+               count = stbi__get8(s);
+               if (count > 128) {
+                  // Run
+                  value = stbi__get8(s);
+                  count -= 128;
+                  if (count > nleft) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); }
+                  for (z = 0; z < count; ++z)
+                     scanline[i++ * 4 + k] = value;
+               } else {
+                  // Dump
+                  if (count > nleft) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); }
+                  for (z = 0; z < count; ++z)
+                     scanline[i++ * 4 + k] = stbi__get8(s);
+               }
+            }
+         }
+         for (i=0; i < width; ++i)
+            stbi__hdr_convert(hdr_data+(j*width + i)*req_comp, scanline + i*4, req_comp);
+      }
+      if (scanline)
+         STBI_FREE(scanline);
+   }
+
+   return hdr_data;
+}
+
+static int stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp)
+{
+   char buffer[STBI__HDR_BUFLEN];
+   char *token;
+   int valid = 0;
+   int dummy;
+
+   if (!x) x = &dummy;
+   if (!y) y = &dummy;
+   if (!comp) comp = &dummy;
+
+   if (stbi__hdr_test(s) == 0) {
+       stbi__rewind( s );
+       return 0;
+   }
+
+   for(;;) {
+      token = stbi__hdr_gettoken(s,buffer);
+      if (token[0] == 0) break;
+      if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1;
+   }
+
+   if (!valid) {
+       stbi__rewind( s );
+       return 0;
+   }
+   token = stbi__hdr_gettoken(s,buffer);
+   if (strncmp(token, "-Y ", 3)) {
+       stbi__rewind( s );
+       return 0;
+   }
+   token += 3;
+   *y = (int) strtol(token, &token, 10);
+   while (*token == ' ') ++token;
+   if (strncmp(token, "+X ", 3)) {
+       stbi__rewind( s );
+       return 0;
+   }
+   token += 3;
+   *x = (int) strtol(token, NULL, 10);
+   *comp = 3;
+   return 1;
+}
+#endif // STBI_NO_HDR
+
+#ifndef STBI_NO_BMP
+static int stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp)
+{
+   void *p;
+   stbi__bmp_data info;
+
+   info.all_a = 255;
+   p = stbi__bmp_parse_header(s, &info);
+   stbi__rewind( s );
+   if (p == NULL)
+      return 0;
+   if (x) *x = s->img_x;
+   if (y) *y = s->img_y;
+   if (comp) {
+      if (info.bpp == 24 && info.ma == 0xff000000)
+         *comp = 3;
+      else
+         *comp = info.ma ? 4 : 3;
+   }
+   return 1;
+}
+#endif
+
+#ifndef STBI_NO_PSD
+static int stbi__psd_info(stbi__context *s, int *x, int *y, int *comp)
+{
+   int channelCount, dummy, depth;
+   if (!x) x = &dummy;
+   if (!y) y = &dummy;
+   if (!comp) comp = &dummy;
+   if (stbi__get32be(s) != 0x38425053) {
+       stbi__rewind( s );
+       return 0;
+   }
+   if (stbi__get16be(s) != 1) {
+       stbi__rewind( s );
+       return 0;
+   }
+   stbi__skip(s, 6);
+   channelCount = stbi__get16be(s);
+   if (channelCount < 0 || channelCount > 16) {
+       stbi__rewind( s );
+       return 0;
+   }
+   *y = stbi__get32be(s);
+   *x = stbi__get32be(s);
+   depth = stbi__get16be(s);
+   if (depth != 8 && depth != 16) {
+       stbi__rewind( s );
+       return 0;
+   }
+   if (stbi__get16be(s) != 3) {
+       stbi__rewind( s );
+       return 0;
+   }
+   *comp = 4;
+   return 1;
+}
+
+static int stbi__psd_is16(stbi__context *s)
+{
+   int channelCount, depth;
+   if (stbi__get32be(s) != 0x38425053) {
+       stbi__rewind( s );
+       return 0;
+   }
+   if (stbi__get16be(s) != 1) {
+       stbi__rewind( s );
+       return 0;
+   }
+   stbi__skip(s, 6);
+   channelCount = stbi__get16be(s);
+   if (channelCount < 0 || channelCount > 16) {
+       stbi__rewind( s );
+       return 0;
+   }
+   (void) stbi__get32be(s);
+   (void) stbi__get32be(s);
+   depth = stbi__get16be(s);
+   if (depth != 16) {
+       stbi__rewind( s );
+       return 0;
+   }
+   return 1;
+}
+#endif
+
+#ifndef STBI_NO_PIC
+static int stbi__pic_info(stbi__context *s, int *x, int *y, int *comp)
+{
+   int act_comp=0,num_packets=0,chained,dummy;
+   stbi__pic_packet packets[10];
+
+   if (!x) x = &dummy;
+   if (!y) y = &dummy;
+   if (!comp) comp = &dummy;
+
+   if (!stbi__pic_is4(s,"\x53\x80\xF6\x34")) {
+      stbi__rewind(s);
+      return 0;
+   }
+
+   stbi__skip(s, 88);
+
+   *x = stbi__get16be(s);
+   *y = stbi__get16be(s);
+   if (stbi__at_eof(s)) {
+      stbi__rewind( s);
+      return 0;
+   }
+   if ( (*x) != 0 && (1 << 28) / (*x) < (*y)) {
+      stbi__rewind( s );
+      return 0;
+   }
+
+   stbi__skip(s, 8);
+
+   do {
+      stbi__pic_packet *packet;
+
+      if (num_packets==sizeof(packets)/sizeof(packets[0]))
+         return 0;
+
+      packet = &packets[num_packets++];
+      chained = stbi__get8(s);
+      packet->size    = stbi__get8(s);
+      packet->type    = stbi__get8(s);
+      packet->channel = stbi__get8(s);
+      act_comp |= packet->channel;
+
+      if (stbi__at_eof(s)) {
+          stbi__rewind( s );
+          return 0;
+      }
+      if (packet->size != 8) {
+          stbi__rewind( s );
+          return 0;
+      }
+   } while (chained);
+
+   *comp = (act_comp & 0x10 ? 4 : 3);
+
+   return 1;
+}
+#endif
+
+// *************************************************************************************************
+// Portable Gray Map and Portable Pixel Map loader
+// by Ken Miller
+//
+// PGM: http://netpbm.sourceforge.net/doc/pgm.html
+// PPM: http://netpbm.sourceforge.net/doc/ppm.html
+//
+// Known limitations:
+//    Does not support comments in the header section
+//    Does not support ASCII image data (formats P2 and P3)
+//    Does not support 16-bit-per-channel
+
+#ifndef STBI_NO_PNM
+
+static int      stbi__pnm_test(stbi__context *s)
+{
+   char p, t;
+   p = (char) stbi__get8(s);
+   t = (char) stbi__get8(s);
+   if (p != 'P' || (t != '5' && t != '6')) {
+       stbi__rewind( s );
+       return 0;
+   }
+   return 1;
+}
+
+static void *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
+{
+   stbi_uc *out;
+   STBI_NOTUSED(ri);
+
+   if (!stbi__pnm_info(s, (int *)&s->img_x, (int *)&s->img_y, (int *)&s->img_n))
+      return 0;
+
+   if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
+   if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
+
+   *x = s->img_x;
+   *y = s->img_y;
+   if (comp) *comp = s->img_n;
+
+   if (!stbi__mad3sizes_valid(s->img_n, s->img_x, s->img_y, 0))
+      return stbi__errpuc("too large", "PNM too large");
+
+   out = (stbi_uc *) stbi__malloc_mad3(s->img_n, s->img_x, s->img_y, 0);
+   if (!out) return stbi__errpuc("outofmem", "Out of memory");
+   stbi__getn(s, out, s->img_n * s->img_x * s->img_y);
+
+   if (req_comp && req_comp != s->img_n) {
+      out = stbi__convert_format(out, s->img_n, req_comp, s->img_x, s->img_y);
+      if (out == NULL) return out; // stbi__convert_format frees input on failure
+   }
+   return out;
+}
+
+static int      stbi__pnm_isspace(char c)
+{
+   return c == ' ' || c == '\t' || c == '\n' || c == '\v' || c == '\f' || c == '\r';
+}
+
+static void     stbi__pnm_skip_whitespace(stbi__context *s, char *c)
+{
+   for (;;) {
+      while (!stbi__at_eof(s) && stbi__pnm_isspace(*c))
+         *c = (char) stbi__get8(s);
+
+      if (stbi__at_eof(s) || *c != '#')
+         break;
+
+      while (!stbi__at_eof(s) && *c != '\n' && *c != '\r' )
+         *c = (char) stbi__get8(s);
+   }
+}
+
+static int      stbi__pnm_isdigit(char c)
+{
+   return c >= '0' && c <= '9';
+}
+
+static int      stbi__pnm_getinteger(stbi__context *s, char *c)
+{
+   int value = 0;
+
+   while (!stbi__at_eof(s) && stbi__pnm_isdigit(*c)) {
+      value = value*10 + (*c - '0');
+      *c = (char) stbi__get8(s);
+   }
+
+   return value;
+}
+
+static int      stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp)
+{
+   int maxv, dummy;
+   char c, p, t;
+
+   if (!x) x = &dummy;
+   if (!y) y = &dummy;
+   if (!comp) comp = &dummy;
+
+   stbi__rewind(s);
+
+   // Get identifier
+   p = (char) stbi__get8(s);
+   t = (char) stbi__get8(s);
+   if (p != 'P' || (t != '5' && t != '6')) {
+       stbi__rewind(s);
+       return 0;
+   }
+
+   *comp = (t == '6') ? 3 : 1;  // '5' is 1-component .pgm; '6' is 3-component .ppm
+
+   c = (char) stbi__get8(s);
+   stbi__pnm_skip_whitespace(s, &c);
+
+   *x = stbi__pnm_getinteger(s, &c); // read width
+   stbi__pnm_skip_whitespace(s, &c);
+
+   *y = stbi__pnm_getinteger(s, &c); // read height
+   stbi__pnm_skip_whitespace(s, &c);
+
+   maxv = stbi__pnm_getinteger(s, &c);  // read max value
+
+   if (maxv > 255)
+      return stbi__err("max value > 255", "PPM image not 8-bit");
+   else
+      return 1;
+}
+#endif
+
+static int stbi__info_main(stbi__context *s, int *x, int *y, int *comp)
+{
+   #ifndef STBI_NO_JPEG
+   if (stbi__jpeg_info(s, x, y, comp)) return 1;
+   #endif
+
+   #ifndef STBI_NO_PNG
+   if (stbi__png_info(s, x, y, comp))  return 1;
+   #endif
+
+   #ifndef STBI_NO_GIF
+   if (stbi__gif_info(s, x, y, comp))  return 1;
+   #endif
+
+   #ifndef STBI_NO_BMP
+   if (stbi__bmp_info(s, x, y, comp))  return 1;
+   #endif
+
+   #ifndef STBI_NO_PSD
+   if (stbi__psd_info(s, x, y, comp))  return 1;
+   #endif
+
+   #ifndef STBI_NO_PIC
+   if (stbi__pic_info(s, x, y, comp))  return 1;
+   #endif
+
+   #ifndef STBI_NO_PNM
+   if (stbi__pnm_info(s, x, y, comp))  return 1;
+   #endif
+
+   #ifndef STBI_NO_HDR
+   if (stbi__hdr_info(s, x, y, comp))  return 1;
+   #endif
+
+   // test tga last because it's a crappy test!
+   #ifndef STBI_NO_TGA
+   if (stbi__tga_info(s, x, y, comp))
+       return 1;
+   #endif
+   return stbi__err("unknown image type", "Image not of any known type, or corrupt");
+}
+
+static int stbi__is_16_main(stbi__context *s)
+{
+   #ifndef STBI_NO_PNG
+   if (stbi__png_is16(s))  return 1;
+   #endif
+
+   #ifndef STBI_NO_PSD
+   if (stbi__psd_is16(s))  return 1;
+   #endif
+
+   return 0;
+}
+
+#ifndef STBI_NO_STDIO
+STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
+{
+    FILE *f = stbi__fopen(filename, "rb");
+    int result;
+    if (!f) return stbi__err("can't fopen", "Unable to open file");
+    result = stbi_info_from_file(f, x, y, comp);
+    fclose(f);
+    return result;
+}
+
+STBIDEF int stbi_info_from_file(FILE *f, int *x, int *y, int *comp)
+{
+   int r;
+   stbi__context s;
+   long pos = ftell(f);
+   stbi__start_file(&s, f);
+   r = stbi__info_main(&s,x,y,comp);
+   fseek(f,pos,SEEK_SET);
+   return r;
+}
+
+STBIDEF int stbi_is_16_bit(char const *filename)
+{
+    FILE *f = stbi__fopen(filename, "rb");
+    int result;
+    if (!f) return stbi__err("can't fopen", "Unable to open file");
+    result = stbi_is_16_bit_from_file(f);
+    fclose(f);
+    return result;
+}
+
+STBIDEF int stbi_is_16_bit_from_file(FILE *f)
+{
+   int r;
+   stbi__context s;
+   long pos = ftell(f);
+   stbi__start_file(&s, f);
+   r = stbi__is_16_main(&s);
+   fseek(f,pos,SEEK_SET);
+   return r;
+}
+#endif // !STBI_NO_STDIO
+
+STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
+{
+   stbi__context s;
+   stbi__start_mem(&s,buffer,len);
+   return stbi__info_main(&s,x,y,comp);
+}
+
+STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
+{
+   stbi__context s;
+   stbi__start_callbacks(&s, (stbi_io_callbacks *) c, user);
+   return stbi__info_main(&s,x,y,comp);
+}
+
+STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
+{
+   stbi__context s;
+   stbi__start_mem(&s,buffer,len);
+   return stbi__is_16_main(&s);
+}
+
+STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
+{
+   stbi__context s;
+   stbi__start_callbacks(&s, (stbi_io_callbacks *) c, user);
+   return stbi__is_16_main(&s);
+}
+
+#endif // STB_IMAGE_IMPLEMENTATION
+
+/*
+   revision history:
+      2.20  (2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs
+      2.19  (2018-02-11) fix warning
+      2.18  (2018-01-30) fix warnings
+      2.17  (2018-01-29) change sbti__shiftsigned to avoid clang -O2 bug
+                         1-bit BMP
+                         *_is_16_bit api
+                         avoid warnings
+      2.16  (2017-07-23) all functions have 16-bit variants;
+                         STBI_NO_STDIO works again;
+                         compilation fixes;
+                         fix rounding in unpremultiply;
+                         optimize vertical flip;
+                         disable raw_len validation;
+                         documentation fixes
+      2.15  (2017-03-18) fix png-1,2,4 bug; now all Imagenet JPGs decode;
+                         warning fixes; disable run-time SSE detection on gcc;
+                         uniform handling of optional "return" values;
+                         thread-safe initialization of zlib tables
+      2.14  (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs
+      2.13  (2016-11-29) add 16-bit API, only supported for PNG right now
+      2.12  (2016-04-02) fix typo in 2.11 PSD fix that caused crashes
+      2.11  (2016-04-02) allocate large structures on the stack
+                         remove white matting for transparent PSD
+                         fix reported channel count for PNG & BMP
+                         re-enable SSE2 in non-gcc 64-bit
+                         support RGB-formatted JPEG
+                         read 16-bit PNGs (only as 8-bit)
+      2.10  (2016-01-22) avoid warning introduced in 2.09 by STBI_REALLOC_SIZED
+      2.09  (2016-01-16) allow comments in PNM files
+                         16-bit-per-pixel TGA (not bit-per-component)
+                         info() for TGA could break due to .hdr handling
+                         info() for BMP to shares code instead of sloppy parse
+                         can use STBI_REALLOC_SIZED if allocator doesn't support realloc
+                         code cleanup
+      2.08  (2015-09-13) fix to 2.07 cleanup, reading RGB PSD as RGBA
+      2.07  (2015-09-13) fix compiler warnings
+                         partial animated GIF support
+                         limited 16-bpc PSD support
+                         #ifdef unused functions
+                         bug with < 92 byte PIC,PNM,HDR,TGA
+      2.06  (2015-04-19) fix bug where PSD returns wrong '*comp' value
+      2.05  (2015-04-19) fix bug in progressive JPEG handling, fix warning
+      2.04  (2015-04-15) try to re-enable SIMD on MinGW 64-bit
+      2.03  (2015-04-12) extra corruption checking (mmozeiko)
+                         stbi_set_flip_vertically_on_load (nguillemot)
+                         fix NEON support; fix mingw support
+      2.02  (2015-01-19) fix incorrect assert, fix warning
+      2.01  (2015-01-17) fix various warnings; suppress SIMD on gcc 32-bit without -msse2
+      2.00b (2014-12-25) fix STBI_MALLOC in progressive JPEG
+      2.00  (2014-12-25) optimize JPG, including x86 SSE2 & NEON SIMD (ryg)
+                         progressive JPEG (stb)
+                         PGM/PPM support (Ken Miller)
+                         STBI_MALLOC,STBI_REALLOC,STBI_FREE
+                         GIF bugfix -- seemingly never worked
+                         STBI_NO_*, STBI_ONLY_*
+      1.48  (2014-12-14) fix incorrectly-named assert()
+      1.47  (2014-12-14) 1/2/4-bit PNG support, both direct and paletted (Omar Cornut & stb)
+                         optimize PNG (ryg)
+                         fix bug in interlaced PNG with user-specified channel count (stb)
+      1.46  (2014-08-26)
+              fix broken tRNS chunk (colorkey-style transparency) in non-paletted PNG
+      1.45  (2014-08-16)
+              fix MSVC-ARM internal compiler error by wrapping malloc
+      1.44  (2014-08-07)
+              various warning fixes from Ronny Chevalier
+      1.43  (2014-07-15)
+              fix MSVC-only compiler problem in code changed in 1.42
+      1.42  (2014-07-09)
+              don't define _CRT_SECURE_NO_WARNINGS (affects user code)
+              fixes to stbi__cleanup_jpeg path
+              added STBI_ASSERT to avoid requiring assert.h
+      1.41  (2014-06-25)
+              fix search&replace from 1.36 that messed up comments/error messages
+      1.40  (2014-06-22)
+              fix gcc struct-initialization warning
+      1.39  (2014-06-15)
+              fix to TGA optimization when req_comp != number of components in TGA;
+              fix to GIF loading because BMP wasn't rewinding (whoops, no GIFs in my test suite)
+              add support for BMP version 5 (more ignored fields)
+      1.38  (2014-06-06)
+              suppress MSVC warnings on integer casts truncating values
+              fix accidental rename of 'skip' field of I/O
+      1.37  (2014-06-04)
+              remove duplicate typedef
+      1.36  (2014-06-03)
+              convert to header file single-file library
+              if de-iphone isn't set, load iphone images color-swapped instead of returning NULL
+      1.35  (2014-05-27)
+              various warnings
+              fix broken STBI_SIMD path
+              fix bug where stbi_load_from_file no longer left file pointer in correct place
+              fix broken non-easy path for 32-bit BMP (possibly never used)
+              TGA optimization by Arseny Kapoulkine
+      1.34  (unknown)
+              use STBI_NOTUSED in stbi__resample_row_generic(), fix one more leak in tga failure case
+      1.33  (2011-07-14)
+              make stbi_is_hdr work in STBI_NO_HDR (as specified), minor compiler-friendly improvements
+      1.32  (2011-07-13)
+              support for "info" function for all supported filetypes (SpartanJ)
+      1.31  (2011-06-20)
+              a few more leak fixes, bug in PNG handling (SpartanJ)
+      1.30  (2011-06-11)
+              added ability to load files via callbacks to accomidate custom input streams (Ben Wenger)
+              removed deprecated format-specific test/load functions
+              removed support for installable file formats (stbi_loader) -- would have been broken for IO callbacks anyway
+              error cases in bmp and tga give messages and don't leak (Raymond Barbiero, grisha)
+              fix inefficiency in decoding 32-bit BMP (David Woo)
+      1.29  (2010-08-16)
+              various warning fixes from Aurelien Pocheville
+      1.28  (2010-08-01)
+              fix bug in GIF palette transparency (SpartanJ)
+      1.27  (2010-08-01)
+              cast-to-stbi_uc to fix warnings
+      1.26  (2010-07-24)
+              fix bug in file buffering for PNG reported by SpartanJ
+      1.25  (2010-07-17)
+              refix trans_data warning (Won Chun)
+      1.24  (2010-07-12)
+              perf improvements reading from files on platforms with lock-heavy fgetc()
+              minor perf improvements for jpeg
+              deprecated type-specific functions so we'll get feedback if they're needed
+              attempt to fix trans_data warning (Won Chun)
+      1.23    fixed bug in iPhone support
+      1.22  (2010-07-10)
+              removed image *writing* support
+              stbi_info support from Jetro Lauha
+              GIF support from Jean-Marc Lienher
+              iPhone PNG-extensions from James Brown
+              warning-fixes from Nicolas Schulz and Janez Zemva (i.stbi__err. Janez (U+017D)emva)
+      1.21    fix use of 'stbi_uc' in header (reported by jon blow)
+      1.20    added support for Softimage PIC, by Tom Seddon
+      1.19    bug in interlaced PNG corruption check (found by ryg)
+      1.18  (2008-08-02)
+              fix a threading bug (local mutable static)
+      1.17    support interlaced PNG
+      1.16    major bugfix - stbi__convert_format converted one too many pixels
+      1.15    initialize some fields for thread safety
+      1.14    fix threadsafe conversion bug
+              header-file-only version (#define STBI_HEADER_FILE_ONLY before including)
+      1.13    threadsafe
+      1.12    const qualifiers in the API
+      1.11    Support installable IDCT, colorspace conversion routines
+      1.10    Fixes for 64-bit (don't use "unsigned long")
+              optimized upsampling by Fabian "ryg" Giesen
+      1.09    Fix format-conversion for PSD code (bad global variables!)
+      1.08    Thatcher Ulrich's PSD code integrated by Nicolas Schulz
+      1.07    attempt to fix C++ warning/errors again
+      1.06    attempt to fix C++ warning/errors again
+      1.05    fix TGA loading to return correct *comp and use good luminance calc
+      1.04    default float alpha is 1, not 255; use 'void *' for stbi_image_free
+      1.03    bugfixes to STBI_NO_STDIO, STBI_NO_HDR
+      1.02    support for (subset of) HDR files, float interface for preferred access to them
+      1.01    fix bug: possible bug in handling right-side up bmps... not sure
+              fix bug: the stbi__bmp_load() and stbi__tga_load() functions didn't work at all
+      1.00    interface to zlib that skips zlib header
+      0.99    correct handling of alpha in palette
+      0.98    TGA loader by lonesock; dynamically add loaders (untested)
+      0.97    jpeg errors on too large a file; also catch another malloc failure
+      0.96    fix detection of invalid v value - particleman@mollyrocket forum
+      0.95    during header scan, seek to markers in case of padding
+      0.94    STBI_NO_STDIO to disable stdio usage; rename all #defines the same
+      0.93    handle jpegtran output; verbose errors
+      0.92    read 4,8,16,24,32-bit BMP files of several formats
+      0.91    output 24-bit Windows 3.0 BMP files
+      0.90    fix a few more warnings; bump version number to approach 1.0
+      0.61    bugfixes due to Marc LeBlanc, Christopher Lloyd
+      0.60    fix compiling as c++
+      0.59    fix warnings: merge Dave Moore's -Wall fixes
+      0.58    fix bug: zlib uncompressed mode len/nlen was wrong endian
+      0.57    fix bug: jpg last huffman symbol before marker was >9 bits but less than 16 available
+      0.56    fix bug: zlib uncompressed mode len vs. nlen
+      0.55    fix bug: restart_interval not initialized to 0
+      0.54    allow NULL for 'int *comp'
+      0.53    fix bug in png 3->4; speedup png decoding
+      0.52    png handles req_comp=3,4 directly; minor cleanup; jpeg comments
+      0.51    obey req_comp requests, 1-component jpegs return as 1-component,
+              on 'test' only check type, not whether we support this variant
+      0.50  (2006-11-19)
+              first released version
+*/
+
+
+/*
+------------------------------------------------------------------------------
+This software is available under 2 licenses -- choose whichever you prefer.
+------------------------------------------------------------------------------
+ALTERNATIVE A - MIT License
+Copyright (c) 2017 Sean Barrett
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+------------------------------------------------------------------------------
+ALTERNATIVE B - Public Domain (www.unlicense.org)
+This is free and unencumbered software released into the public domain.
+Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
+software, either in source code form or as a compiled binary, for any purpose,
+commercial or non-commercial, and by any means.
+In jurisdictions that recognize copyright laws, the author or authors of this
+software dedicate any and all copyright interest in the software to the public
+domain. We make this dedication for the benefit of the public at large and to
+the detriment of our heirs and successors. We intend this dedication to be an
+overt act of relinquishment in perpetuity of all present and future rights to
+this software under copyright law.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+------------------------------------------------------------------------------
+*/
diff --git a/gfx/doc/extern/2013SiggraphPresentationsNotes-26915738.pdf b/gfx/doc/extern/2013SiggraphPresentationsNotes-26915738.pdf
new file mode 100644
index 0000000..989658e
--- /dev/null
+++ b/gfx/doc/extern/2013SiggraphPresentationsNotes-26915738.pdf
diff --git a/gfx/doc/gfx.png b/gfx/doc/gfx.png
new file mode 100644
index 0000000..e64f6e1
--- /dev/null
+++ b/gfx/doc/gfx.png
diff --git a/gfx/doc/gfx.txt b/gfx/doc/gfx.txt
new file mode 100644
index 0000000..d3ce01b
--- /dev/null
+++ b/gfx/doc/gfx.txt
@@ -0,0 +1,10 @@
+@startuml
+
+class Gfx {
+
+}
+
+Gfx --> Render
+Gfx *-- Scene
+
+@enduml
diff --git a/gfx/doc/gltfOverview-2.0.0b.png b/gfx/doc/gltfOverview-2.0.0b.png
new file mode 100644
index 0000000..6a5bb61
--- /dev/null
+++ b/gfx/doc/gltfOverview-2.0.0b.png
diff --git a/gfx/doc/pipeline.png b/gfx/doc/pipeline.png
new file mode 100644
index 0000000..426f39e
--- /dev/null
+++ b/gfx/doc/pipeline.png
diff --git a/gfx/doc/pipeline.txt b/gfx/doc/pipeline.txt
new file mode 100644
index 0000000..51523d6
--- /dev/null
+++ b/gfx/doc/pipeline.txt
@@ -0,0 +1,16 @@
+@startuml
+
+class RenderPipeline {
+
+}
+
+RenderPipeline *-- RenderPass
+
+class RenderPass {
+  +clear colour
+}
+
+RenderPass --> Shader
+RenderPass o-- RenderTarget
+
+@enduml
diff --git a/gfx/doc/renderer.png b/gfx/doc/renderer.png
new file mode 100644
index 0000000..d0516b0
--- /dev/null
+++ b/gfx/doc/renderer.png
diff --git a/gfx/doc/renderer.txt b/gfx/doc/renderer.txt
new file mode 100644
index 0000000..90b18f8
--- /dev/null
+++ b/gfx/doc/renderer.txt
@@ -0,0 +1,18 @@
+@startuml
+
+class Render {
+
+}
+
+Render *-- RenderPipeline
+Render --> Assets
+
+class Assets {
+
+}
+
+Assets *-- Shader
+Assets *-- Geometry
+Assets *-- Texture
+
+@enduml
diff --git a/gfx/doc/scene.png b/gfx/doc/scene.png
new file mode 100644
index 0000000..017e91b
--- /dev/null
+++ b/gfx/doc/scene.png
diff --git a/gfx/doc/scene.txt b/gfx/doc/scene.txt
new file mode 100644
index 0000000..dc22927
--- /dev/null
+++ b/gfx/doc/scene.txt
@@ -0,0 +1,80 @@
+@startuml
+
+class Scene {
+
+}
+
+Scene *-- Camera
+Scene *-- Node
+
+class Camera {
+
+}
+
+class Node {
+  + transform
+}
+
+Node *-- Object
+Node o-- Light : "affected by"
+Node o-- Camera
+Node *-- Node
+
+class Object {
+  + transform
+}
+
+Object *-- Mesh
+
+class Mesh {
+
+}
+
+Mesh --> BoundingVolume
+Mesh --> Geometry
+Mesh --> Material
+
+class Geometry {
+  + positions
+  + normals
+  + texcoords
+  + indices
+}
+
+class BoundingVolume {
+
+}
+
+class Material {
+  + shader params
+}
+
+Material --> Shader
+Material o-- Texture
+
+class Shader {
+  + uniforms
+}
+
+Shader --> VertexShader
+Shader --> FragmentShader
+
+class VertexShader {
+  + pos
+  + normal
+  + texcoords
+  + Modelview
+  + Projection
+}
+
+class FragmentShader {
+  + lights
+  + textures
+}
+
+class Texture {
+  + pixels
+  + format
+}
+
+@enduml
diff --git a/gfx/include/gfx/README.md b/gfx/include/gfx/README.md
new file mode 100644
index 0000000..81f6759
--- /dev/null
+++ b/gfx/include/gfx/README.md
@@ -0,0 +1,3 @@
+# GFX / include
+
+Public API of the graphics library.
diff --git a/gfx/include/gfx/error.h b/gfx/include/gfx/error.h
new file mode 100644
index 0000000..b7887bb
--- /dev/null
+++ b/gfx/include/gfx/error.h
@@ -0,0 +1,24 @@
+#pragma once
+
+#include <cstring.h>
+#include <stdio.h>
+
+/// Get the last error.
+const char* gfx_get_error(void);
+
+extern xlstring gfx_error;
+
+/// Set the last error.
+#define gfx_set_error(FORMAT, ...)                                             \
+  gfx_error.length = snprintf(gfx_error.str, xlstring_size,                    \
+                              FORMAT __VA_OPT__(, ) __VA_ARGS__)
+
+/// Prepend an error to the last error.
+#define gfx_prepend_error(FORMAT, ...)                                         \
+  {                                                                            \
+    xlstring head;                                                             \
+    head.length =                                                              \
+        snprintf(head.str, xlstring_size, FORMAT __VA_OPT__(, ) __VA_ARGS__);  \
+    head = xlstring_concat(head, xlstring_make(": "));                         \
+    gfx_error = xlstring_concat(head, gfx_error);                              \
+  }
diff --git a/gfx/include/gfx/gfx.h b/gfx/include/gfx/gfx.h
new file mode 100644
index 0000000..b9b7183
--- /dev/null
+++ b/gfx/include/gfx/gfx.h
@@ -0,0 +1,35 @@
+#pragma once
+
+typedef struct RenderBackend RenderBackend;
+typedef struct Renderer Renderer;
+typedef struct Scene Scene;
+typedef struct SceneCamera SceneCamera;
+
+typedef struct Gfx Gfx;
+
+/// Create a new graphics system,
+Gfx* gfx_init();
+
+/// Destroy the graphics system.
+void gfx_destroy(Gfx**);
+
+/// Get the render backend.
+RenderBackend* gfx_get_render_backend(Gfx*);
+
+/// Get the renderer.
+Renderer* gfx_get_renderer(Gfx*);
+
+/// Create a new scene.
+Scene* gfx_make_scene(Gfx*);
+
+/// Destroy the scene.
+///
+/// This function destroys the scene and all objects that it owns (scene
+/// objects, cameras, lights, etc), but not objects that could be shared with
+/// other scenes (meshes, materials, etc).
+void gfx_destroy_scene(Gfx*, Scene**);
+
+/// Remove unused resources from the scene (meshes, materials).
+/// TODO: need to think about the interface for scene_purge(). Maybe this
+/// should be gfx_purge() and take a list of Scenes?
+// void gfx_purge(Scene*);
diff --git a/gfx/include/gfx/render_backend.h b/gfx/include/gfx/render_backend.h
new file mode 100644
index 0000000..46c2908
--- /dev/null
+++ b/gfx/include/gfx/render_backend.h
@@ -0,0 +1,345 @@
+/// Render Backend.
+///
+/// The Render Backend creates and owns graphics objects and performs low-level
+/// rendering operations.
+#pragma once
+
+#include <math/fwd.h>
+#include <math/mat4.h>
+#include <math/vec4.h>
+
+#include <cstring.h>
+
+#include <stddef.h>
+#include <stdint.h>
+
+// Implementation objects.
+typedef struct Buffer Buffer;
+typedef struct FrameBuffer FrameBuffer;
+typedef struct Geometry Geometry;
+typedef struct RenderBuffer RenderBuffer;
+typedef struct Shader Shader;
+typedef struct ShaderProgram ShaderProgram;
+typedef struct Texture Texture;
+typedef struct RenderBackend RenderBackend;
+
+/// Data type for vertex indices.
+/// Might need U32 for bigger models.
+typedef uint16_t VertexIndex;
+typedef uint16_t VertexCount;
+
+/// Geometry drawing modes.
+typedef enum PrimitiveType {
+  Triangles,
+  TriangleFan,
+  TriangleStrip
+} PrimitiveType;
+
+/// A buffer view for vertex data (attributes or indices).
+/// Either 'data' or 'buffer' must be set.
+#define MAKE_BUFFER_VIEW(NAME, TYPE)                                           \
+  typedef struct NAME {                                                        \
+    const TYPE* data;                                                          \
+    const Buffer* buffer;                                                      \
+    size_t offset_bytes;                                                       \
+    size_t size_bytes;                                                         \
+    size_t stride_bytes;                                                       \
+  } NAME;
+
+/// A buffer view for 2D vectors.
+MAKE_BUFFER_VIEW(BufferView2d, vec2)
+
+/// A buffer view for 3D vectors.
+MAKE_BUFFER_VIEW(BufferView3d, vec3)
+
+/// A buffer view for 4D vectors.
+MAKE_BUFFER_VIEW(BufferView4d, vec4)
+
+/// A buffer view for vertex indices.
+MAKE_BUFFER_VIEW(BufferViewIdx, uint16_t)
+
+/// Describes a piece of geometry.
+typedef struct GeometryDesc {
+  BufferView2d positions2d;
+  BufferView3d positions3d;
+  BufferView3d normals;
+  BufferView4d tangents;
+  BufferView2d texcoords;
+  BufferViewIdx indices;
+  VertexCount num_verts;
+  size_t num_indices;
+  PrimitiveType type;
+} GeometryDesc;
+
+/// Shader types.
+typedef enum { VertexShader, FragmentShader } ShaderType;
+
+/// Describes a shader.
+typedef struct ShaderDesc {
+  const char* code;
+  ShaderType type;
+} ShaderDesc;
+
+/// Describes a shader program.
+typedef struct ShaderProgramDesc {
+  const Shader* vertex_shader;
+  const Shader* fragment_shader;
+} ShaderProgramDesc;
+
+/// Shader uniform type.
+typedef enum {
+  UniformFloat,
+  UniformMat4,
+  UniformTexture,
+  UniformVec3,
+  UniformVec4
+} UniformType;
+
+/// Shader uniform.
+typedef struct ShaderUniform {
+  sstring name;
+  UniformType type;
+  union {
+    const Texture* texture;
+    mat4 mat4;
+    vec3 vec3;
+    vec4 vec4;
+    float scalar;
+  } value;
+} ShaderUniform;
+
+typedef enum { Texture2D, TextureCubeMap } TextureDimension;
+
+typedef enum {
+  TextureDepth,
+  TextureRG16,
+  TextureRG16F,
+  TextureRGB8,
+  TextureRGBA8,
+  TextureSRGB8,
+  TextureSRGBA8
+} TextureFormat;
+
+typedef enum { NearestFiltering, LinearFiltering } TextureFiltering;
+
+typedef enum { Repeat, ClampToEdge } TextureWrapping;
+
+typedef enum {
+  CubemapFacePosX,
+  CubemapFaceNegX,
+  CubemapFacePosY,
+  CubemapFaceNegY,
+  CubemapFacePosZ,
+  CubemapFaceNegZ
+} CubemapFace;
+
+/// Describes a texture.
+typedef struct TextureDesc {
+  int width;
+  int height;
+  int depth; // Not used until 3D textures are exposed.
+  TextureDimension dimension;
+  TextureFormat format;
+  TextureFiltering filtering;
+  TextureWrapping wrap;
+  bool mipmaps;
+  union {
+    const void* pixels;
+    struct {
+      const void* pixels_pos_x;
+      const void* pixels_neg_x;
+      const void* pixels_pos_y;
+      const void* pixels_neg_y;
+      const void* pixels_pos_z;
+      const void* pixels_neg_z;
+    } cubemap;
+  };
+} TextureDesc;
+
+/// Describes a renderbuffer.
+typedef struct RenderBufferDesc {
+  int width;
+  int height;
+  TextureFormat texture_format;
+} RenderBufferDesc;
+
+/// Framebuffer attachment type.
+typedef enum FrameBufferAttachmentType {
+  FrameBufferNoAttachment,
+  FrameBufferTexture,
+  FrameBufferCubemapTexture,
+  FrameBufferRenderBuffer
+} FrameBufferAttachmentType;
+
+/// Describes a framebuffer attachment.
+typedef struct FrameBufferAttachment {
+  FrameBufferAttachmentType type;
+  union {
+    struct {
+      Texture* texture;
+      int mip_level;
+    } texture;
+    struct {
+      Texture* texture;
+      int mip_level;
+      CubemapFace face;
+    } cubemap;
+    RenderBuffer* renderbuffer;
+  };
+} FrameBufferAttachment;
+
+/// Describes a framebuffer.
+typedef struct FrameBufferDesc {
+  FrameBufferAttachment colour;
+  FrameBufferAttachment depth;
+} FrameBufferDesc;
+
+// -----------------------------------------------------------------------------
+// Render commands.
+// -----------------------------------------------------------------------------
+
+/// Start a new frame.
+void gfx_start_frame(RenderBackend*);
+
+/// End a frame.
+void gfx_end_frame(RenderBackend*);
+
+/// Set the render backend's viewport dimensions.
+void gfx_set_viewport(RenderBackend*, int width, int height);
+
+/// Get the render backend's viewport dimensions.
+void gfx_get_viewport(RenderBackend*, int* width, int* height);
+
+// -----------------------------------------------------------------------------
+// Buffers.
+// -----------------------------------------------------------------------------
+
+/// Create a buffer from raw data.
+Buffer* gfx_make_buffer(RenderBackend*, const void*, size_t size_bytes);
+
+/// Create a buffer from 2D vertices.
+Buffer* gfx_make_buffer2d(RenderBackend*, const vec2* verts, size_t count);
+
+/// Create a buffer from 3D vertices.
+Buffer* gfx_make_buffer3d(RenderBackend*, const vec3* verts, size_t count);
+
+/// Create a buffer from 4D vertices.
+Buffer* gfx_make_buffer4d(RenderBackend*, const vec4* verts, size_t count);
+
+/// Destroy the buffer.
+void gfx_destroy_buffer(RenderBackend*, Buffer**);
+
+// -----------------------------------------------------------------------------
+// Geometry.
+// -----------------------------------------------------------------------------
+
+/// Create geometry.
+Geometry* gfx_make_geometry(RenderBackend*, const GeometryDesc*);
+
+/// Destroy the geometry.
+void gfx_destroy_geometry(RenderBackend*, Geometry**);
+
+/// Render the geometry.
+void gfx_render_geometry(const Geometry*);
+
+// -----------------------------------------------------------------------------
+// Textures.
+// -----------------------------------------------------------------------------
+
+/// Create a texture.
+Texture* gfx_make_texture(RenderBackend*, const TextureDesc*);
+
+/// Destroy the texture.
+void gfx_destroy_texture(RenderBackend*, Texture**);
+
+// -----------------------------------------------------------------------------
+// Renderbuffers.
+// -----------------------------------------------------------------------------
+
+/// Create a renderbuffer.
+RenderBuffer* gfx_make_renderbuffer(RenderBackend*, const RenderBufferDesc*);
+
+/// Destroy the renderbuffer.
+void gfx_destroy_renderbuffer(RenderBackend*, RenderBuffer**);
+
+// -----------------------------------------------------------------------------
+// Framebuffers.
+// -----------------------------------------------------------------------------
+
+/// Create a framebuffer.
+FrameBuffer* gfx_make_framebuffer(RenderBackend*, const FrameBufferDesc*);
+
+/// Destroy the framebuffer.
+void gfx_destroy_framebuffer(RenderBackend*, FrameBuffer**);
+
+/// Attach a colour buffer to the framebuffer.
+bool gfx_framebuffer_attach_colour(FrameBuffer*, const FrameBufferAttachment*);
+
+/// Attach a depth buffer to the framebuffer.
+bool gfx_framebuffer_attach_depth(FrameBuffer*, const FrameBufferAttachment*);
+
+/// Activate the framebuffer.
+/// Subsequent draw calls write to this framebuffer.
+void gfx_activate_framebuffer(const FrameBuffer*);
+
+/// Deactivate the framebuffer.
+/// Subsequent draw calls write to the default framebuffer.
+void gfx_deactivate_framebuffer(const FrameBuffer*);
+
+/// Set the framebuffer's viewport.
+/// This function should be called every time the framebuffer is activated.
+void gfx_framebuffer_set_viewport(FrameBuffer*, int x, int y, int width,
+                                  int height);
+
+// -----------------------------------------------------------------------------
+// Shaders.
+// -----------------------------------------------------------------------------
+
+/// Create a shader.
+Shader* gfx_make_shader(RenderBackend*, const ShaderDesc*);
+
+/// Destroy the shader.
+void gfx_destroy_shader(RenderBackend*, Shader**);
+
+/// Create a shader program.
+ShaderProgram* gfx_make_shader_program(RenderBackend*,
+                                       const ShaderProgramDesc*);
+
+/// Destroy the shader program.
+void gfx_destroy_shader_program(RenderBackend*, ShaderProgram**);
+
+/// Activate the shader program.
+void gfx_activate_shader_program(const ShaderProgram*);
+
+/// Deactivate the shader program.
+void gfx_deactivate_shader_program(const ShaderProgram*);
+
+/// Apply the shader program's uniform variables.
+///
+/// Calls to gfx_set_XYZ_uniform save the values of the uniform variables in the
+/// graphics library. By calling this function, those values are passed on to
+/// the graphics driver for rendering.
+///
+/// This function should be called after setting all of the uniform variables
+/// and prior to issuing a draw call.
+void gfx_apply_uniforms(const ShaderProgram*);
+
+/// Set the texture uniform.
+/// Has no effect if the shader does not contain the given uniform.
+void gfx_set_texture_uniform(ShaderProgram*, const char* name, const Texture*);
+
+/// Set the matrix uniform.
+/// Has no effect if the shader does not contain the given uniform.
+void gfx_set_mat4_uniform(ShaderProgram*, const char* name, const mat4*);
+
+/// Set the vec3 uniform.
+/// Has no effect if the shader does not contain the given uniform.
+void gfx_set_vec3_uniform(ShaderProgram*, const char* name, vec3);
+
+/// Set the vec4 uniform.
+/// Has no effect if the shader does not contain the given uniform.
+void gfx_set_vec4_uniform(ShaderProgram*, const char* name, vec4);
+
+/// Set the float uniform.
+/// Has no effect if the shader does not contain the given uniform.
+void gfx_set_float_uniform(ShaderProgram*, const char* name, float value);
diff --git a/gfx/include/gfx/renderer.h b/gfx/include/gfx/renderer.h
new file mode 100644
index 0000000..d82fab6
--- /dev/null
+++ b/gfx/include/gfx/renderer.h
@@ -0,0 +1,11 @@
+#pragma once
+
+typedef struct RenderBackend RenderBackend;
+typedef struct Scene Scene;
+typedef struct SceneCamera SceneCamera;
+
+typedef struct Renderer Renderer;
+
+/// Render the scene.
+void gfx_render_scene(Renderer*, RenderBackend*, const Scene*,
+                      const SceneCamera*);
diff --git a/gfx/include/gfx/scene/README.md b/gfx/include/gfx/scene/README.md
new file mode 100644
index 0000000..916596b
--- /dev/null
+++ b/gfx/include/gfx/scene/README.md
@@ -0,0 +1,27 @@
+# Scene Graph
+
+A scene graph implementation that includes:
+
+- Camera
+- Light
+- Material
+- Mesh
+- Node
+- Object
+- Scene
+
+## Hierarchy and parenting
+
+Scene graphs typically expose functions on nodes to add/remove objects, cameras,
+lights, etc. This implementation forces the hierarchy to be a strict tree and
+not a more general DAG. Given this, and to avoid confusion, we instead expose
+functions to set the parent node of an object/camera/light. If we exposed the
+former, the API could create the illusion that the hierarchy can be a DAG.
+
+The strict tree hierarchy should not be that restrictive in practice. Even the
+glTF 2.0 spec [enforces this](https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#nodes-and-hierarchy):
+
+*For Version 2.0 conformance, the glTF node hierarchy is not a directed acyclic
+graph (DAG) or scene graph, but a disjoint union of strict trees. That is, no
+node may be a direct descendant of more than one node. This restriction is meant
+to simplify implementation and facilitate conformance.*
diff --git a/gfx/include/gfx/scene/camera.h b/gfx/include/gfx/scene/camera.h
new file mode 100644
index 0000000..99d83fe
--- /dev/null
+++ b/gfx/include/gfx/scene/camera.h
@@ -0,0 +1,22 @@
+#pragma once
+
+#include <math/fwd.h>
+
+typedef struct SceneNode SceneNode;
+
+typedef struct SceneCamera SceneCamera;
+
+/// Create a new camera.
+SceneCamera* gfx_make_camera();
+
+/// Destroy the camera.
+///
+/// The camera is conveniently removed from the scene graph and its parent scene
+/// node is destroyed.
+void gfx_destroy_camera(SceneCamera**);
+
+/// Set the scene camera's math camera.
+void gfx_set_camera_camera(SceneCamera* scene_camera, Camera* camera);
+
+/// Get the scene camera's math camera.
+Camera* gfx_get_camera_camera(SceneCamera*);
diff --git a/gfx/include/gfx/scene/light.h b/gfx/include/gfx/scene/light.h
new file mode 100644
index 0000000..132e344
--- /dev/null
+++ b/gfx/include/gfx/scene/light.h
@@ -0,0 +1,30 @@
+#pragma once
+
+typedef struct Texture Texture;
+
+typedef struct Light Light;
+
+/// Light type.
+typedef enum LightType { EnvironmentLightType } LightType;
+
+/// Describes an environment light.
+typedef struct EnvironmentLightDesc {
+  const Texture* environment_map;
+} EnvironmentLightDesc;
+
+/// Describes a light.
+typedef struct LightDesc {
+  LightType type;
+  union {
+    EnvironmentLightDesc environment;
+  } light;
+} LightDesc;
+
+/// Create a light.
+Light* gfx_make_light(const LightDesc*);
+
+/// Destroy the light.
+///
+/// The light is conveniently removed from the scene graph and its parent scene
+/// node is destroyed.
+void gfx_destroy_light(Light**);
diff --git a/gfx/include/gfx/scene/material.h b/gfx/include/gfx/scene/material.h
new file mode 100644
index 0000000..6c22515
--- /dev/null
+++ b/gfx/include/gfx/scene/material.h
@@ -0,0 +1,30 @@
+#pragma once
+
+#include <gfx/render_backend.h>
+#include <gfx/sizes.h>
+
+typedef struct Material Material;
+
+/// Describes a material.
+///
+/// A material holds a shader program and a set of shader-specific uniform
+/// variables. Two materials can share the same shader, but shader parameters
+/// generally give two materials a different appearance.
+typedef struct MaterialDesc {
+  ShaderProgram* shader; // TODO: Move to Mesh? Cannot fully determine shader
+                         // permutation without geometry. Or move the creation
+                         // of permutations to the renderer? A multi-pass
+                         // renderer will juggle multiple shader programs
+                         // anyway.
+  ShaderUniform uniforms[GFX_MAX_UNIFORMS_PER_MATERIAL];
+  int num_uniforms;
+} MaterialDesc;
+
+/// Create a material.
+Material* gfx_make_material(const MaterialDesc*);
+
+/// Destroy the material.
+///
+/// The caller must make sure that no Mesh points to the given Material.
+/// For a safe purge of unused resources, see scene_purge().
+void gfx_destroy_material(Material**);
diff --git a/gfx/include/gfx/scene/mesh.h b/gfx/include/gfx/scene/mesh.h
new file mode 100644
index 0000000..f16572a
--- /dev/null
+++ b/gfx/include/gfx/scene/mesh.h
@@ -0,0 +1,21 @@
+#pragma once
+
+typedef struct Geometry Geometry;
+typedef struct Material Material;
+
+typedef struct Mesh Mesh;
+
+/// Describes a mesh.
+typedef struct MeshDesc {
+  const Geometry* geometry;
+  const Material* material;
+} MeshDesc;
+
+/// Create a mesh.
+Mesh* gfx_make_mesh(const MeshDesc*);
+
+/// Destroy the mesh.
+///
+/// The caller must make sure that no SceneObject points to the given Mesh.
+/// For a safe purge of unused resources, see scene_purge().
+void gfx_destroy_mesh(Mesh**);
diff --git a/gfx/include/gfx/scene/node.h b/gfx/include/gfx/scene/node.h
new file mode 100644
index 0000000..736ff21
--- /dev/null
+++ b/gfx/include/gfx/scene/node.h
@@ -0,0 +1,45 @@
+#pragma once
+
+#include <math/fwd.h>
+
+typedef struct Light Light;
+typedef struct SceneCamera SceneCamera;
+typedef struct SceneObject SceneObject;
+
+typedef struct SceneNode SceneNode;
+
+/// Create a new scene node.
+///
+/// This node does not contain any camera, light, object, etc. and exists simply
+/// as a logical and spatial construct.
+SceneNode* gfx_make_node();
+
+/// Create a new camera node.
+SceneNode* gfx_make_camera_node(SceneCamera*);
+
+/// Create a new light node.
+SceneNode* gfx_make_light_node(Light*);
+
+/// Create a new object node.
+SceneNode* gfx_make_object_node(SceneObject*);
+
+/// Destroy the scene node.
+///
+/// The scene node is conveniently removed from the scene graph.
+///
+/// The node's camera, light, object, etc. is also conveniently destroyed.
+void gfx_destroy_node(SceneNode**);
+
+/// Set the node's parent.
+///
+/// Pass in null to unwire from the existing parent, if one exists.
+void gfx_set_node_parent(SceneNode*, SceneNode* parent);
+
+/// Set the node's transform.
+void gfx_set_node_transform(SceneNode*, const mat4* transform);
+
+/// Set the node's position.
+void gfx_set_node_position(SceneNode*, const vec3* position);
+
+/// Set the node's rotation.
+void gfx_set_node_rotation(SceneNode*, const mat4* rotation);
diff --git a/gfx/include/gfx/scene/object.h b/gfx/include/gfx/scene/object.h
new file mode 100644
index 0000000..69a2231
--- /dev/null
+++ b/gfx/include/gfx/scene/object.h
@@ -0,0 +1,26 @@
+#pragma once
+
+#include <math/fwd.h>
+
+typedef struct Mesh Mesh;
+typedef struct SceneNode SceneNode;
+
+typedef struct SceneObject SceneObject;
+
+/// Create a new object.
+SceneObject* gfx_make_object();
+
+/// Destroy the object.
+///
+/// The object is conveniently removed from the scene graph and its parent scene
+/// node is destroyed.
+void gfx_destroy_object(SceneObject**);
+
+/// Sets the object's transformation matrix.
+void gfx_set_object_transform(SceneObject*, const mat4*);
+
+/// Add a mesh to the object.
+void gfx_add_object_mesh(SceneObject*, Mesh*);
+
+/// Remove a mesh from the object.
+void gfx_remove_object_mesh(SceneObject*, Mesh*);
diff --git a/gfx/include/gfx/scene/scene.h b/gfx/include/gfx/scene/scene.h
new file mode 100644
index 0000000..0de0f3c
--- /dev/null
+++ b/gfx/include/gfx/scene/scene.h
@@ -0,0 +1,10 @@
+#pragma once
+
+#include <math/fwd.h>
+
+typedef struct SceneNode SceneNode;
+
+typedef struct Scene Scene;
+
+/// Get the scene's root node.
+SceneNode* gfx_get_scene_root(Scene*);
diff --git a/gfx/include/gfx/sizes.h b/gfx/include/gfx/sizes.h
new file mode 100644
index 0000000..7681e1f
--- /dev/null
+++ b/gfx/include/gfx/sizes.h
@@ -0,0 +1,58 @@
+/// Size constants used throughout the library.
+#pragma once
+
+// Scene.
+
+/// Maximum number of cameras per scene.
+#define GFX_MAX_NUM_CAMERAS 16
+
+/// Maximum number of lights.
+#define GFX_MAX_NUM_LIGHTS 1024
+
+/// Maximum number of materials.
+#define GFX_MAX_NUM_MATERIALS 1024
+
+/// Maximum number of meshes.
+#define GFX_MAX_NUM_MESHES 1024
+
+/// Maximum number of mesh links.
+#define GFX_MAX_NUM_MESH_LINKS 1024
+
+/// Maximum number of nodes per scene.
+#define GFX_MAX_NUM_NODES 1024
+
+/// Maximum number of objects per scene.
+#define GFX_MAX_NUM_OBJECTS 1024
+
+/// Maximum number of uniforms in a Material.
+#define GFX_MAX_UNIFORMS_PER_MATERIAL 18
+
+// Render.
+
+/// Maximum number of buffers per renderer.
+#define GFX_MAX_NUM_BUFFERS 1024
+
+/// Maximum number of framebuffers per renderer.
+#define GFX_MAX_NUM_FRAMEBUFFERS 32
+
+/// Maximum number of geometries per renderer.
+#define GFX_MAX_NUM_GEOMETRIES 1024
+
+/// Maximum number of renderbuffers per renderer.
+#define GFX_MAX_NUM_RENDERBUFFERS (GFX_MAX_NUM_FRAMEBUFFERS * 2)
+
+/// Maximum number of shader programs per renderer.
+#define GFX_MAX_NUM_SHADER_PROGRAMS 128
+
+/// Maximum number of shaders per renderer.
+#define GFX_MAX_NUM_SHADERS (GFX_MAX_NUM_SHADER_PROGRAMS * 2)
+
+/// Maximum number of textures per renderer.
+#define GFX_MAX_NUM_TEXTURES 1024
+
+/// Maximum number of uniforms in a ShaderProgram.
+#define GFX_MAX_UNIFORMS_PER_SHADER 16
+
+// Gfx
+
+#define GFX_MAX_NUM_SCENES 4
diff --git a/gfx/include/gfx/util/README.md b/gfx/include/gfx/util/README.md
new file mode 100644
index 0000000..642cf24
--- /dev/null
+++ b/gfx/include/gfx/util/README.md
@@ -0,0 +1,3 @@
+# GFX / util
+
+Various utilities on top of the core graphics library.
diff --git a/gfx/include/gfx/util/geometry.h b/gfx/include/gfx/util/geometry.h
new file mode 100644
index 0000000..c62022b
--- /dev/null
+++ b/gfx/include/gfx/util/geometry.h
@@ -0,0 +1,13 @@
+/// Functions to construct geometry procedurally.
+#pragma once
+
+#include <gfx/render_backend.h>
+
+#include <math/vec2.h>
+#include <math/vec3.h>
+
+/// Construct a quad with positions in the range [-1, 1]^2.
+Geometry* gfx_make_quad_11(RenderBackend*);
+
+/// Construct a quad with positions in the range [0, 1]^2.
+Geometry* gfx_make_quad_01(RenderBackend*);
diff --git a/gfx/include/gfx/util/ibl.h b/gfx/include/gfx/util/ibl.h
new file mode 100644
index 0000000..5d76e54
--- /dev/null
+++ b/gfx/include/gfx/util/ibl.h
@@ -0,0 +1,28 @@
+/// Functions for image-based lighting.
+#pragma once
+
+typedef struct IBL IBL;
+
+typedef struct RenderBackend RenderBackend;
+typedef struct Texture Texture;
+
+/// Create an environment map filterer for IBL.
+IBL* gfx_make_ibl(RenderBackend*);
+
+/// Destroy the environment map filterer.
+void gfx_destroy_ibl(RenderBackend*, IBL**);
+
+/// Create a BRDF integration map for IBL.
+Texture* gfx_make_brdf_integration_map(IBL*, RenderBackend*, int width,
+                                       int height);
+
+/// Create an irradiance map (cubemap) from an environment map for IBL.
+Texture* gfx_make_irradiance_map(IBL*, RenderBackend*,
+                                 const Texture* environment_map, int width,
+                                 int height);
+
+/// Create a prefiltered environment map (cubemap) for IBL.
+Texture* gfx_make_prefiltered_environment_map(IBL*, RenderBackend*,
+                                              const Texture* environment_map,
+                                              int width, int height,
+                                              int* max_mip_level);
diff --git a/gfx/include/gfx/util/scene.h b/gfx/include/gfx/util/scene.h
new file mode 100644
index 0000000..98267aa
--- /dev/null
+++ b/gfx/include/gfx/util/scene.h
@@ -0,0 +1,31 @@
+/// Load scene files.
+#pragma once
+
+#include <stdbool.h>
+#include <stddef.h>
+
+typedef struct Gfx           Gfx;
+typedef struct SceneNode     SceneNode;
+typedef struct ShaderProgram ShaderProgram;
+
+typedef struct LoadSceneCmd {
+  enum { SceneFromMemory, SceneFromFile } origin;
+  union {
+    struct {
+      const char* filepath;
+    };
+    struct {
+      const void* data;
+      size_t      size_bytes;
+    };
+  };
+} LoadSceneCmd;
+
+/// Load a scene.
+///
+/// |root_node| is the node under which scene elements are loaded.
+/// |shader| is the shader program assigned to the loaded scene objects.
+///
+/// Currently only supports the GLTF format.
+bool gfx_load_scene(
+    Gfx*, SceneNode* root_node, ShaderProgram* shader, const LoadSceneCmd*);
diff --git a/gfx/include/gfx/util/shader.h b/gfx/include/gfx/util/shader.h
new file mode 100644
index 0000000..d801153
--- /dev/null
+++ b/gfx/include/gfx/util/shader.h
@@ -0,0 +1,35 @@
+/// A variety of shaders included for convenience.
+#pragma once
+
+typedef struct RenderBackend RenderBackend;
+typedef struct ShaderProgram ShaderProgram;
+
+/// Create a BRDF integration map shader.
+ShaderProgram* gfx_make_brdf_integration_map_shader(RenderBackend*);
+
+/// Create a Cook-Torrance shader.
+ShaderProgram* gfx_make_cook_torrance_shader(RenderBackend*);
+
+/// Create a 3D debugging shader.
+ShaderProgram* gfx_make_debug3d_shader(RenderBackend*);
+
+/// Create a shader for computing irradiance maps from cube maps.
+ShaderProgram* gfx_make_irradiance_map_shader(RenderBackend*);
+
+/// Create a shader for computing prefiltered environment maps from cube maps.
+ShaderProgram* gfx_make_prefiltered_environment_map_shader(RenderBackend*);
+
+/// Create a skyquad shader.
+ShaderProgram* gfx_make_skyquad_shader(RenderBackend*);
+
+/// Create a shader to view normal-mapped normals.
+ShaderProgram* gfx_make_view_normal_mapped_normals_shader(RenderBackend*);
+
+/// Create a shader to view vertex normals.
+ShaderProgram* gfx_make_view_normals_shader(RenderBackend*);
+
+/// Create a shader to view vertex tangents.
+ShaderProgram* gfx_make_view_tangents_shader(RenderBackend*);
+
+/// Create a shader to view textures.
+ShaderProgram* gfx_make_view_texture_shader(RenderBackend*);
diff --git a/gfx/include/gfx/util/skyquad.h b/gfx/include/gfx/util/skyquad.h
new file mode 100644
index 0000000..88c9c41
--- /dev/null
+++ b/gfx/include/gfx/util/skyquad.h
@@ -0,0 +1,10 @@
+/// A skyquad is like a skybox but with a single quad.
+#pragma once
+
+typedef struct Gfx Gfx;
+typedef struct Scene Scene;
+typedef struct SceneObject SceneObject;
+typedef struct Texture Texture;
+
+/// Create a skyquad.
+SceneObject* gfx_make_skyquad(Gfx*, Scene*, const Texture*);
diff --git a/gfx/include/gfx/util/texture.h b/gfx/include/gfx/util/texture.h
new file mode 100644
index 0000000..cdc582b
--- /dev/null
+++ b/gfx/include/gfx/util/texture.h
@@ -0,0 +1,63 @@
+/// Load textures from images.
+#pragma once
+
+#include <gfx/render_backend.h>
+
+#include <cstring.h>
+
+#include <stdbool.h>
+#include <stddef.h>
+
+/// Describes a texture's colour space.
+typedef enum TextureColourSpace {
+  sRGB, // The most likely default.
+  LinearColourSpace,
+} TextureColourSpace;
+
+/// Describes a command to load a texture.
+typedef struct LoadTextureCmd {
+  enum { TextureFromMemory, TextureFromFile } origin;
+  enum { LoadTexture, LoadCubemap } type;
+  TextureColourSpace colour_space;
+  TextureFiltering filtering;
+  TextureWrapping wrap;
+  bool mipmaps;
+  union {
+    // A single texture.
+    struct {
+      union {
+        struct {
+          mstring filepath;
+        };
+        struct {
+          const void* data;
+          size_t size_bytes;
+        };
+      };
+    } texture;
+    // Cubemap texture.
+    struct {
+      union {
+        struct {
+          mstring filepath_pos_x;
+          mstring filepath_neg_x;
+          mstring filepath_pos_y;
+          mstring filepath_neg_y;
+          mstring filepath_pos_z;
+          mstring filepath_neg_z;
+        } filepaths;
+        struct {
+          const void* data_pos_x;
+          const void* data_neg_x;
+          const void* data_pos_y;
+          const void* data_neg_y;
+          const void* data_pos_z;
+          const void* data_neg_z;
+        } buffers;
+      };
+    } cubemap;
+  } data;
+} LoadTextureCmd;
+
+/// Load a cubemap texture.
+Texture* gfx_load_texture(RenderBackend*, const LoadTextureCmd*);
diff --git a/gfx/shaders/brdf_integration_map.frag b/gfx/shaders/brdf_integration_map.frag
new file mode 100644
index 0000000..bb2cebd
--- /dev/null
+++ b/gfx/shaders/brdf_integration_map.frag
@@ -0,0 +1,93 @@
+precision highp float;
+
+#define PI 3.1415926535897932384626433832795
+#define NUM_SAMPLES 1024
+
+in vec2 Texcoord;
+
+layout (location = 0) out vec2 Color;
+
+float radical_inverse_VdC(uint bits) {
+    bits = (bits << 16u) | (bits >> 16u);
+    bits = ((bits & 0x55555555u) << 1u) | ((bits & 0xAAAAAAAAu) >> 1u);
+    bits = ((bits & 0x33333333u) << 2u) | ((bits & 0xCCCCCCCCu) >> 2u);
+    bits = ((bits & 0x0F0F0F0Fu) << 4u) | ((bits & 0xF0F0F0F0u) >> 4u);
+    bits = ((bits & 0x00FF00FFu) << 8u) | ((bits & 0xFF00FF00u) >> 8u);
+    return float(bits) * 2.3283064365386963e-10; // / 0x100000000
+}
+
+vec2 hammersley(uint i, uint N) {
+    return vec2(float(i)/float(N), radical_inverse_VdC(i));
+}
+
+vec3 importance_sample_GGX(vec2 sample_box, vec3 N, float roughness) {
+  float r2 = roughness * roughness;
+
+  // Spherical coordinates.
+  float phi = 2.0 * PI * sample_box.x;
+  float cos_theta = sqrt((1.0 - sample_box.y) / (1.0 + (r2*r2 - 1.0) * sample_box.y));
+  float sin_theta = sqrt(1.0 - cos_theta * cos_theta);
+
+  // Map spherical coordinates to Cartesian coordinates in tangent space.
+  vec3 H = vec3(cos(phi) * sin_theta, sin(phi) * sin_theta, cos_theta);
+
+  // Map from tangent space to world space.
+  //
+  // Tangent space:
+  //
+  //        N
+  //        |
+  //        |
+  //        |
+  //        |_ _ _ _ _ B
+  //       /
+  //      /
+  //     T
+  vec3 up = abs(N.z) < 0.999 ? vec3(0.0, 0.0, 1.0) : vec3(1.0, 0.0, 0.0);
+  vec3 T = normalize(cross(up,N));
+  vec3 B = cross(N,T);
+  vec3 H_ws = H.x*T + H.y*B + H.z*N;
+  return H_ws;
+}
+
+float geometry_schlick_GGX(float k, float NdotV) {
+  return NdotV / (NdotV * (1.0 - k) + k);
+}
+
+float geometry_smith(float roughness, float NdotL, float NdotV) {
+  float k = roughness * roughness / 2.0; // IBL
+  return geometry_schlick_GGX(k, NdotV) * geometry_schlick_GGX(k, NdotL);
+}
+
+vec2 integrate_brdf(float NdotV, float roughness)
+{
+  vec3 V = vec3(sqrt(1.0 - NdotV * NdotV), 0.0, NdotV);
+  vec3 N = vec3(0.0, 0.0, 1.0);
+
+  float scale = 0.0;
+  float bias = 0.0;
+  for (int i = 0; i < NUM_SAMPLES; ++i) {
+    vec2 sample_box = hammersley(i, NUM_SAMPLES);
+    vec3 H = importance_sample_GGX(sample_box, N, roughness);
+    vec3 L = reflect(-V,H);
+    float NdotL = max(0.0, L.z);
+
+    if (NdotL > 0.0) {
+      float NdotH = max(0.0, H.z);
+      float VdotH = max(0.0, dot(V,H));
+      float G = geometry_smith(roughness, NdotL, NdotV);
+      float G_vis = (G * VdotH) / (NdotH * NdotV);
+      float Fc = pow(1.0 - VdotH, 5.0);
+      scale += (1.0 - Fc) * G_vis;
+      bias  += Fc * G_vis;
+    }
+  }
+  scale /= float(NUM_SAMPLES);
+  bias  /= float(NUM_SAMPLES);
+  return vec2(scale, bias);
+}
+
+void main()
+{
+  Color = integrate_brdf(Texcoord.x, Texcoord.y);
+}
diff --git a/gfx/shaders/cook_torrance.frag b/gfx/shaders/cook_torrance.frag
new file mode 100644
index 0000000..b4cf590
--- /dev/null
+++ b/gfx/shaders/cook_torrance.frag
@@ -0,0 +1,215 @@
+precision highp float;
+
+uniform vec4  BaseColorFactor;
+uniform float MetallicFactor;
+uniform float RoughnessFactor;
+uniform vec3  EmissiveFactor;
+
+uniform sampler2D BaseColorTexture;
+uniform sampler2D MetallicRoughnessTexture;
+uniform sampler2D EmissiveTexture;
+uniform sampler2D AmbientOcclusionTexture;
+uniform sampler2D NormalMap;
+
+uniform samplerCube Sky;
+uniform samplerCube IrradianceMap;
+uniform samplerCube PrefilteredEnvironmentMap;
+uniform sampler2D   BRDFIntegrationMap;
+uniform float       MaxReflectionLOD;
+
+uniform vec3 CameraPosition; // World space.
+
+// World-space position and normal.
+in vec3 Position;
+in vec3 Normal;
+#ifdef HAS_TANGENTS
+in vec4 Tangent;
+#endif // HAS_TANGENTS
+in vec2 Texcoord;
+
+layout (location = 0) out vec4 Colour;
+
+#define PI 3.1415926535897932384626433832795
+#define INV_PI 0.3183098861837907
+
+// TODO: Move to "normal.h"
+vec3 get_vs_normal(vec3 normalWs, vec3 normalMapSample) {
+  vec3 N = normalize(Normal);
+#ifdef HAS_TANGENTS
+  //vec3 T = normalize(tangent.xyz - dot(tangent.xyz, N) * N);
+  vec3 T = Tangent.xyz;
+  vec3 B = Tangent.w * cross(N, T);
+#else // No tangents
+  vec3 pos_dx = dFdx(Position);
+  vec3 pos_dy = dFdy(Position);
+  // vec3 uv_dx = vec3(dFdx(Texcoord), 0.0);
+  // vec3 uv_dy = vec3(dFdy(Texcoord), 0.0);
+  vec3 uv_dx = dFdx(vec3(Texcoord, 0.0));
+  vec3 uv_dy = dFdy(vec3(Texcoord, 0.0));
+  vec3 T = (uv_dy.t * pos_dx - uv_dx.t * pos_dy) /
+           (uv_dx.s * uv_dy.t - uv_dy.s * uv_dx.t);
+  // vec3 T = pos_dx * uv_dy.t - pos_dy * uv_dx.t;
+  T = normalize(T - dot(T, N) * N);
+  vec3 B = normalize(cross(N, T));
+#endif // HAS_TANGENTS
+
+  if (gl_FrontFacing == false) {
+    T = -T;
+    B = -B;
+    N = -N;
+  }
+
+  vec3 s = normalMapSample;
+  //return normalize(s.x * T + s.y * B + s.z * N);
+  return normalize(mat3(T,B,N) * s);
+}
+
+float trowbridge_reitz_GGX(float roughness, float NdotH) {
+  float a = roughness * roughness;
+  float a2 = a * a;
+  float d = NdotH * NdotH * (a2 - 1.0) + 1.0;
+  return a2 / (PI * d * d);
+}
+
+float geometry_schlick_GGX(float k, float NdotV) {
+  return NdotV / (NdotV * (1.0 - k) + k);
+}
+
+float geometry_smith(float roughness, float NdotL, float NdotV) {
+  float k = roughness * roughness / 2.0; // IBL
+  return geometry_schlick_GGX(k, NdotV) * geometry_schlick_GGX(k, NdotL);
+}
+
+vec3 fresnel_schlick(vec3 F0, float HdotV) {
+  return F0 + (1.0 - F0) * pow(clamp(1.0 - HdotV, 0.0, 1.0), 5.0);
+}
+
+vec3 fresnel_schlick_roughness(vec3 F0, float NdotV, float roughness) {
+  return F0
+    + (max(vec3(1.0 - roughness), F0) - F0)
+    * pow(clamp(1.0 - NdotV, 0.0, 1.0), 5.0);
+}
+
+// Cook-Torrance BRDF for a single light direction.
+vec3 cook_torrance(
+    vec3 albedo, float metallic, float roughness, vec3 emissive,
+    float NdotL, float NdotV, float NdotH, float HdotV) {
+  vec3 F0 = mix(vec3(0.04), albedo, metallic);
+  float D = trowbridge_reitz_GGX(roughness, NdotH);
+  vec3  F = fresnel_schlick(F0, HdotV);
+  float G = geometry_smith(roughness, NdotL, NdotV);
+  vec3 Kd = mix(vec3(1.0) - F, vec3(0.0), metallic);
+  vec3 diffuse = Kd*albedo*INV_PI;
+  // Take a max to prevent division by 0 when either dot product is 0.
+  vec3 specular = (D*F*G) / max(4.0 * NdotV * NdotL, 0.0001);
+  return emissive + diffuse + specular;
+}
+
+// Cook-Torrance BRDF for IBL.
+vec3 cook_torrance_IBL(
+    vec3 albedo, float metallic, float roughness, vec3 emissive, float occlusion,
+    float NdotV,
+    vec3 irradiance, vec3 prefiltered_env, vec2 BRDF_env, vec3 ambient) {
+  vec3 F0 = mix(vec3(0.04), albedo, metallic);
+  vec3  F = fresnel_schlick_roughness(F0, NdotV, roughness);
+  vec3 Kd = mix(vec3(1.0) - F, vec3(0.0), metallic);
+  vec3 diffuse = Kd * albedo * INV_PI * irradiance;
+  vec3 specular = prefiltered_env * (F * BRDF_env.x + BRDF_env.y);
+  float ambient_strength = 0.05; // TODO: Make ambient strength a parameter.
+  ambient *= ambient_strength * occlusion;
+  emissive *= EmissiveFactor;
+  return emissive + ambient + diffuse + specular;
+}
+
+void main()
+{
+  // TODO: Also use the specular F0 map from the model, and emissive. Make sure
+  // to use all maps.
+  // https://sketchfab.com/models/b81008d513954189a063ff901f7abfe4
+  // TODO: Normal map samples should not be gamma-corrected when loaded, they
+  // are already authored as linear.
+  vec3 normalMapSample = normalize(texture(NormalMap, Texcoord).xyz * 2.0 - 1.0);
+  //vec3 normalMapSample = texture(NormalMap, Texcoord).xyz;
+  //normalMapSample = normalize(pow(normalMapSample, vec3(1.0 / 2.2)) * 2.0 - 1.0);
+  vec3 N = get_vs_normal(Normal, normalMapSample);
+  vec3 V = normalize(CameraPosition - Position);
+  vec3 R = reflect(-V, N);
+  // Not needed for IBL.
+  //vec3 L = N;
+  //vec3 H = normalize(L + V);
+
+  float NdotV = max(0.0, dot(N, V));
+  // Not needed for IBL.
+  //float NdotL = max(0.0, dot(N,L));
+  //float NdotH = max(0.0, dot(N,H));
+  //float HdotV = clamp(dot(H,V), 0.0, 1.0);  // Clamp to prevent black spots.
+
+  // TODO: BaseColorFactor and BaseColorTexture are vec4/rgba quantities
+  // respectively. Handle the alpha channel later.
+  // TODO: Other factors.
+  vec3 albedo = vec3(BaseColorFactor) * texture(BaseColorTexture, Texcoord).rgb;
+  vec3 metal_roughness = texture(MetallicRoughnessTexture, Texcoord).rgb;
+  vec3 emissive = texture(EmissiveTexture, Texcoord).rgb;
+  float occlusion = texture(AmbientOcclusionTexture, Texcoord).r;
+  float metallic = MetallicFactor  * metal_roughness.b;
+  float roughness = metal_roughness.g;
+
+  // For a single light direction:
+  // vec3 brdf = cook_torrance(albedo, metallic, roughness, emissive, NdotL, NdotV, NdotH, HdotV);
+  // vec3 Li = texture(Sky, N).rgb;
+  // vec3 colour = brdf * Li * NdotL;
+
+  // For IBL:
+  vec3 irradiance = texture(IrradianceMap, N).rgb;
+  vec3 prefiltered_env = textureLod(PrefilteredEnvironmentMap, R, roughness * MaxReflectionLOD).rgb;
+  vec3 ambient = textureLod(PrefilteredEnvironmentMap, R, MaxReflectionLOD).rgb;
+  vec2 BRDF_env = texture(BRDFIntegrationMap, vec2(NdotV, roughness)).rg;
+  vec3 colour = cook_torrance_IBL(
+    albedo, metallic, roughness, emissive, occlusion, NdotV, irradiance, prefiltered_env, BRDF_env, ambient);
+
+  // Reinhard tone mapping.
+  colour = colour / (colour + vec3(1.0));
+
+  // Gamma correction.
+  colour = pow(colour, vec3(1.0 / 2.2));
+
+  // Debugging.
+  //
+  // Normal texture.
+  //colour = normalMapSample * 0.5 + 0.5;
+  //
+  // Geometry normal.
+  //colour = normalize(Normal) * 0.5 + 0.5;
+  //
+  // Shading normal.
+  //colour = N * 0.5 + 0.5;
+  //
+  // Tangent and bitangent.
+  // {
+  //   vec3 pos_dx = dFdx(Position);
+  //   vec3 pos_dy = dFdy(Position);
+  //   // vec3 uv_dx = vec3(dFdx(Texcoord), 0.0);
+  //   // vec3 uv_dy = vec3(dFdy(Texcoord), 0.0);
+  //   vec3 uv_dx = dFdx(vec3(Texcoord, 0.0));
+  //   vec3 uv_dy = dFdy(vec3(Texcoord, 0.0));
+  //   vec3 T = (uv_dy.t * pos_dx - uv_dx.t * pos_dy) /
+  //            (uv_dx.s * uv_dy.t - uv_dy.s * uv_dx.t);
+  //   // vec3 T = pos_dx * uv_dy.t - pos_dy * uv_dx.t;
+  //   vec3 N = normalize(Normal);
+  //   T = normalize(T - dot(T, N) * N);
+  //   vec3 B = normalize(cross(N, T));
+
+  //   if (gl_FrontFacing == false) {
+  //     T = -T;
+  //     B = -B;
+  //     N = -N;
+  //   }
+
+  //   // Tangent.
+  //   //colour = T * 0.5 + 0.5;
+  //   // Bitangent.
+  //   //colour = B * 0.5 + 0.5;
+  // }
+
+  Colour = vec4(colour, 1.0);
+}
diff --git a/gfx/shaders/cook_torrance.vert b/gfx/shaders/cook_torrance.vert
new file mode 100644
index 0000000..c66efa6
--- /dev/null
+++ b/gfx/shaders/cook_torrance.vert
@@ -0,0 +1,31 @@
+precision highp float;
+
+uniform mat4 ModelMatrix;
+uniform mat4 MVP;
+
+layout (location = 0) in vec3 vPosition;
+layout (location = 1) in vec3 vNormal;
+#ifdef HAS_TANGENTS
+layout (location = 2) in vec4 vTangent;
+#endif // HAS_TANGENTS
+layout (location = 3) in vec2 vTexcoord;
+
+// World-space position and normal.
+out vec3 Position;
+out vec3 Normal;
+#ifdef HAS_TANGENTS
+out vec4 Tangent;
+#endif // HAS_TANGENTS
+out vec2 Texcoord;
+
+void main()
+{
+  Position = vec3(ModelMatrix * vec4(vPosition, 1.0));
+  Normal = mat3(ModelMatrix) * vNormal;
+  //Normal = normalize(ModelMatrix * vec4(vNormal, 0.0)).xyz;
+#ifdef HAS_TANGENTS
+  Tangent = vec4(mat3(ModelMatrix) * vTangent.xyz, vTangent.w);
+#endif // HAS_TANGENTS
+  Texcoord = vTexcoord;
+  gl_Position = MVP * vec4(vPosition, 1.0);
+}
diff --git a/gfx/shaders/cubemap_filtering.vert b/gfx/shaders/cubemap_filtering.vert
new file mode 100644
index 0000000..cdc291c
--- /dev/null
+++ b/gfx/shaders/cubemap_filtering.vert
@@ -0,0 +1,34 @@
+precision highp float;
+
+#define PI 3.1415926535897932384626433832795
+#define FOVY (90.0 * PI / 180.0)
+
+uniform mat4 Modelview;
+
+layout (location = 0) in vec2 vPosition;
+
+out vec3 Ray;
+
+// This is very similar to the skyquad vertex shader.
+//
+// The ray is not normalized because it isn't necessary for cubemap sampling.
+//
+// We also use a fixed fovy = 90 degrees because we want the frustum to pass
+// exactly through each face of the cube. The aspect ratio is also just 1.
+//
+// |d| here appears with a positive sign in the returned vector because the
+// rotation part of the Modelview matrix is responsible for orienting the ray
+// appropriately.
+vec3 sky_ray(vec2 Texcoord)
+{
+  float d = 0.5 / tan(FOVY/2.0);
+  return vec3(Texcoord.x - 0.5, Texcoord.y - 0.5, d);
+}
+
+void main()
+{
+  mat3 Rotation = mat3(Modelview);
+  Ray = Rotation * sky_ray(vPosition*0.5 + 0.5); // map [-1,1] -> [0,1]
+  // Should disable depth test when rendering.
+  gl_Position = vec4(vPosition.xy, 0.99999, 1.0);
+}
diff --git a/gfx/shaders/debug3d.frag b/gfx/shaders/debug3d.frag
new file mode 100644
index 0000000..54568d4
--- /dev/null
+++ b/gfx/shaders/debug3d.frag
@@ -0,0 +1,21 @@
+precision highp float;
+
+const vec3 Colour = vec3(0.97, 0.948, 0.91);
+
+const vec3 ToLight = vec3(1, 0.7, 1);
+
+in vec3 Normal;
+
+out vec4 FragColour;
+
+void main()
+{
+    vec3 N = normalize(Normal);
+    vec3 L = normalize(ToLight);
+
+    vec3 a = vec3(0.7);
+    vec3 d = vec3(0.3 * (0.7*max(0.0, dot(L,N)) + 0.3*max(0.0, dot(-L,N))));
+    vec3 c = Colour * (a+d);
+
+    FragColour = vec4(pow(c, vec3(1.0 / 2.2)), 1.0);
+}
diff --git a/gfx/shaders/debug3d.vert b/gfx/shaders/debug3d.vert
new file mode 100644
index 0000000..d51684f
--- /dev/null
+++ b/gfx/shaders/debug3d.vert
@@ -0,0 +1,15 @@
+precision highp float;
+
+uniform mat4 Modelview;
+uniform mat4 Projection;
+
+layout (location = 0) in vec3 vPosition;
+layout (location = 1) in vec3 vNormal;
+
+out vec3 Normal;
+
+void main()
+{
+    Normal = mat3(Modelview) * vNormal;
+    gl_Position = Projection * Modelview * vec4(vPosition, 1.0);
+}
diff --git a/gfx/shaders/irradiance_map.frag b/gfx/shaders/irradiance_map.frag
new file mode 100644
index 0000000..3cfe5b2
--- /dev/null
+++ b/gfx/shaders/irradiance_map.frag
@@ -0,0 +1,60 @@
+precision highp float;
+
+#define PI 3.1415926535897932384626433832795
+#define EPS 0.001
+#define NUM_SAMPLES_AZIMUTH 250
+#define NUM_SAMPLES_ZENITH 50
+#define MAX_AZIMUTH (2*PI)
+#define MAX_ZENITH (PI/2.0)
+#define AZIMUTH_DELTA (MAX_AZIMUTH / float(NUM_SAMPLES_AZIMUTH))
+#define ZENITH_DELTA (MAX_ZENITH / float(NUM_SAMPLES_ZENITH))
+
+uniform samplerCube Sky;
+
+in vec3 Ray;
+
+layout (location = 0) out vec4 Color;
+
+void main()
+{
+  // Tangent space:
+  //
+  //        N
+  //        |
+  //        |
+  //        |
+  //        |_ _ _ _ _ B
+  //       /
+  //      /
+  //     T
+  vec3 N = normalize(Ray);
+  vec3 B = (abs(N.x) - 1.0 <= EPS) ? vec3(0.0, 0.0, 1.0) : vec3(1.0, 0.0, 0.0);
+  vec3 T = cross(B, N);
+  B = cross(N, T);
+
+  int num_samples = 0;
+  vec3 irradiance = vec3(0.0);
+  for (float theta = 0.0; theta < MAX_AZIMUTH; theta += AZIMUTH_DELTA) {
+    for (float phi = 0.0; phi < MAX_ZENITH; phi += ZENITH_DELTA) {
+      // Spherical to Cartesian.
+      vec3 sample_tangent_space = vec3(
+        sin(phi) * cos(theta),
+        sin(phi) * sin(theta),
+        cos(phi));
+      // Tangent space to world space.
+      vec3 sample_world_space =
+        sample_tangent_space.x * B +
+        sample_tangent_space.y * T +
+        sample_tangent_space.z * N;
+
+      irradiance += texture(Sky, sample_world_space).rgb * sin(phi) * cos(phi);
+      num_samples += 1;
+    }
+  }
+  irradiance = PI * irradiance / float(num_samples);
+
+  // For debugging in trace.
+  //irradiance = pow(irradiance, vec3(1.0/2.2));
+
+  Color = vec4(irradiance, 1.0);
+}
diff --git a/gfx/shaders/prefiltered_environment_map.frag b/gfx/shaders/prefiltered_environment_map.frag
new file mode 100644
index 0000000..8327950
--- /dev/null
+++ b/gfx/shaders/prefiltered_environment_map.frag
@@ -0,0 +1,78 @@
+precision highp float;
+
+#define PI 3.1415926535897932384626433832795
+#define NUM_SAMPLES 4096
+
+uniform samplerCube Sky;
+uniform float Roughness;
+
+in vec3 Ray;
+
+layout (location = 0) out vec4 Color;
+
+float radical_inverse_VdC(uint bits) {
+    bits = (bits << 16u) | (bits >> 16u);
+    bits = ((bits & 0x55555555u) << 1u) | ((bits & 0xAAAAAAAAu) >> 1u);
+    bits = ((bits & 0x33333333u) << 2u) | ((bits & 0xCCCCCCCCu) >> 2u);
+    bits = ((bits & 0x0F0F0F0Fu) << 4u) | ((bits & 0xF0F0F0F0u) >> 4u);
+    bits = ((bits & 0x00FF00FFu) << 8u) | ((bits & 0xFF00FF00u) >> 8u);
+    return float(bits) * 2.3283064365386963e-10; // / 0x100000000
+}
+
+vec2 hammersley(uint i, uint N) {
+    return vec2(float(i)/float(N), radical_inverse_VdC(i));
+}
+
+vec3 importance_sample_GGX(vec2 sample_box, vec3 N, float roughness) {
+  float r2 = roughness * roughness;
+
+  // Spherical coordinates.
+  float phi = 2.0 * PI * sample_box.x;
+  float cos_theta = sqrt((1.0 - sample_box.y) / (1.0 + (r2*r2 - 1.0) * sample_box.y));
+  float sin_theta = sqrt(1.0 - cos_theta * cos_theta);
+
+  // Map spherical coordinates to Cartesian coordinates in tangent space.
+  vec3 H = vec3(cos(phi) * sin_theta, sin(phi) * sin_theta, cos_theta);
+
+  // Map from tangent space to world space.
+  //
+  // Tangent space:
+  //
+  //        N
+  //        |
+  //        |
+  //        |
+  //        |_ _ _ _ _ B
+  //       /
+  //      /
+  //     T
+  vec3 up = abs(N.z) < 0.999 ? vec3(0.0, 0.0, 1.0) : vec3(1.0, 0.0, 0.0);
+  vec3 T = normalize(cross(up,N));
+  vec3 B = cross(N,T);
+  vec3 H_ws = H.x*T + H.y*B + H.z*N;
+  return H_ws;
+}
+
+void main()
+{
+  vec3 N = normalize(Ray);
+  vec3 R = N;
+  vec3 V = R;
+
+  vec3 irradiance = vec3(0.0);
+  float total_weight = 0.0;
+  for (uint i = 0; i < NUM_SAMPLES; ++i) {
+    vec2 sample_box = hammersley(i, NUM_SAMPLES);
+    vec3 H = importance_sample_GGX(sample_box, N, Roughness);
+    vec3 L = reflect(-V,H);
+
+    float NdotL = max(dot(N,L), 0.0);
+    if (NdotL > 0.0) {
+      irradiance += texture(Sky, H).rgb * NdotL;
+      total_weight += NdotL;
+    }
+  }
+  irradiance /= total_weight;
+
+  Color = vec4(irradiance, 1.0);
+}
diff --git a/gfx/shaders/quad.vert b/gfx/shaders/quad.vert
new file mode 100644
index 0000000..ef1834c
--- /dev/null
+++ b/gfx/shaders/quad.vert
@@ -0,0 +1,9 @@
+layout (location = 0) in vec2 Position;  // Assuming Position in [-1,1].
+
+out vec2 Texcoord;
+
+void main()
+{
+  Texcoord = Position * 0.5 + 0.5;
+  gl_Position = vec4(Position, 0.0, 1.0);
+}
diff --git a/gfx/shaders/skyquad.frag b/gfx/shaders/skyquad.frag
new file mode 100644
index 0000000..39af013
--- /dev/null
+++ b/gfx/shaders/skyquad.frag
@@ -0,0 +1,11 @@
+uniform samplerCube Skyquad;
+
+in vec3 Ray;
+
+layout (location = 0) out vec4 Colour;
+
+void main()
+{
+    vec3 R = normalize(Ray);
+    Colour = vec4(pow(texture(Skyquad, R).rgb, vec3(1.0/2.2)), 1.0);
+}
diff --git a/gfx/shaders/skyquad.vert b/gfx/shaders/skyquad.vert
new file mode 100644
index 0000000..f0658d6
--- /dev/null
+++ b/gfx/shaders/skyquad.vert
@@ -0,0 +1,28 @@
+uniform mat4 Modelview;
+uniform float Fovy;
+uniform float Aspect;
+
+layout (location = 0) in vec2 Position;
+
+out vec3 Ray;
+
+// We would typically normalize the vector, but there is no need to do so when
+// sampling a cube map.
+vec3 sky_ray(vec2 Texcoord)
+{
+  //float d = 0.5 / tan(Fovy/2.0);
+  // return vec3((Texcoord.x - 0.5) * Aspect,
+  //              Texcoord.y - 0.5,
+  //              -d);
+  float d = 0.5 / tan(Fovy/2.0);
+  return vec3((Texcoord.x - 0.5),
+               Texcoord.y - 0.5,
+               -d);
+}
+
+void main()
+{
+  mat3 Rotation = mat3(Modelview);
+  Ray = Rotation * sky_ray(Position*0.5 + 0.5); // map [-1,1] -> [0,1]
+  gl_Position = vec4(Position, 0.99999, 1.0); // z=1 -> send to background
+}
diff --git a/gfx/shaders/view_normal_mapped_normals.frag b/gfx/shaders/view_normal_mapped_normals.frag
new file mode 100644
index 0000000..a372c02
--- /dev/null
+++ b/gfx/shaders/view_normal_mapped_normals.frag
@@ -0,0 +1,28 @@
+precision highp float;
+
+uniform sampler2D NormalMap;
+
+in vec3 Normal;
+in vec4 Tangent;
+in vec3 Bitangent; // TODO: Compute here or in PS?
+in vec2 Texcoord;
+
+out vec4 FragColour;
+
+// TODO: Move to "normal.h"
+vec3 get_vs_normal(vec3 normal, vec4 tangent, vec3 normalMapSample) {
+  vec3 N = normal;
+  // vec3 T = normalize(interpTangent   - dot(tangent, N)*N);
+  // vec3 B = normalize(interpBitangent - dot(interpTangent, N)*N - dot(interpTangent, T)*T);
+  vec3 T = tangent.xyz;
+  //vec3 B = tangent.w * cross(N,T);
+  vec3 B = Bitangent;
+  vec3 n = normalMapSample;
+  return normalize(n.x*T + n.y*B + n.z*N);
+}
+
+void main() {
+  vec3 normalMapSample = texture(NormalMap, Texcoord).xyz * 2.0 - 1.0;
+  vec3 N = get_vs_normal(Normal, Tangent, normalMapSample);
+  FragColour = vec4(pow(N, vec3(1.0 / 2.2)), 1.0);
+}
diff --git a/gfx/shaders/view_normal_mapped_normals.vert b/gfx/shaders/view_normal_mapped_normals.vert
new file mode 100644
index 0000000..004ed9a
--- /dev/null
+++ b/gfx/shaders/view_normal_mapped_normals.vert
@@ -0,0 +1,22 @@
+precision highp float;
+
+uniform mat4 Modelview;
+uniform mat4 Projection;
+
+layout (location = 0) in vec3 vPosition;
+layout (location = 1) in vec3 vNormal;
+layout (location = 2) in vec4 vTangent;
+layout (location = 3) in vec2 vTexcoord;
+
+out vec3 Normal;
+out vec4 Tangent;
+out vec3 Bitangent; // TODO: Compute here or in PS?
+out vec2 Texcoord;
+
+void main() {
+  Texcoord = vTexcoord;
+  Normal = mat3(Modelview) * vNormal;
+  Tangent = vec4(mat3(Modelview) * vTangent.xyz, vTangent.w);
+  Bitangent = cross(Normal, Tangent.xyz) * vTangent.w;
+  gl_Position = Projection * Modelview * vec4(vPosition, 1.0);
+}
diff --git a/gfx/shaders/view_normals.frag b/gfx/shaders/view_normals.frag
new file mode 100644
index 0000000..e90189c
--- /dev/null
+++ b/gfx/shaders/view_normals.frag
@@ -0,0 +1,11 @@
+precision highp float;
+
+in vec3 Normal;
+
+out vec4 FragColour;
+
+void main()
+{
+    vec3 N = normalize(Normal);
+    FragColour = vec4(pow(N, vec3(1.0 / 2.2)), 1.0);
+}
diff --git a/gfx/shaders/view_normals.vert b/gfx/shaders/view_normals.vert
new file mode 100644
index 0000000..d51684f
--- /dev/null
+++ b/gfx/shaders/view_normals.vert
@@ -0,0 +1,15 @@
+precision highp float;
+
+uniform mat4 Modelview;
+uniform mat4 Projection;
+
+layout (location = 0) in vec3 vPosition;
+layout (location = 1) in vec3 vNormal;
+
+out vec3 Normal;
+
+void main()
+{
+    Normal = mat3(Modelview) * vNormal;
+    gl_Position = Projection * Modelview * vec4(vPosition, 1.0);
+}
diff --git a/gfx/shaders/view_tangents.frag b/gfx/shaders/view_tangents.frag
new file mode 100644
index 0000000..11d1455
--- /dev/null
+++ b/gfx/shaders/view_tangents.frag
@@ -0,0 +1,17 @@
+precision highp float;
+
+in vec4 Tangent;
+
+out vec4 FragColour;
+
+void main() {
+  vec3 T = normalize(Tangent.xyz);
+  FragColour = vec4(pow(T, vec3(1.0 / 2.2)), 1.0);FragColour = vec4(pow(T, vec3(1.0 / 2.2)), 1.0);
+
+  // View sign.
+  // float sign = Tangent.w;
+  // float R = sign > 0.0 ? 1.0 : 0.0;
+  // float B = sign < 0.0 ? 1.0 : 0.0;
+  // vec3 signColour = vec3(R,0.0,B);
+  // FragColour = vec4(pow(signColour, vec3(1.0 / 2.2)), 1.0);
+}
diff --git a/gfx/shaders/view_tangents.vert b/gfx/shaders/view_tangents.vert
new file mode 100644
index 0000000..561ad22
--- /dev/null
+++ b/gfx/shaders/view_tangents.vert
@@ -0,0 +1,14 @@
+precision highp float;
+
+uniform mat4 Modelview;
+uniform mat4 Projection;
+
+layout (location = 0) in vec3 vPosition;
+layout (location = 2) in vec4 vTangent;
+
+out vec4 Tangent;
+
+void main() {
+  Tangent = vec4(Tangent.xyz = mat3(Modelview) * vTangent.xyz, vTangent.w);
+  gl_Position = Projection * Modelview * vec4(vPosition, 1.0);
+}
diff --git a/gfx/shaders/view_texture.frag b/gfx/shaders/view_texture.frag
new file mode 100644
index 0000000..a81263b
--- /dev/null
+++ b/gfx/shaders/view_texture.frag
@@ -0,0 +1,11 @@
+uniform sampler2D Texture;
+
+in vec2 Texcoord;
+
+layout (location = 0) out vec4 Colour;
+
+void main()
+{
+  vec3 colour = texture(Texture, Texcoord).rgb;
+  Colour = vec4(pow(colour, vec3(1.0 / 2.2)), 1.0);
+}
diff --git a/gfx/shaders/view_texture.vert b/gfx/shaders/view_texture.vert
new file mode 100644
index 0000000..49a0422
--- /dev/null
+++ b/gfx/shaders/view_texture.vert
@@ -0,0 +1,9 @@
+layout (location = 0) in vec2 Position;
+
+out vec2 Texcoord;
+
+void main()
+{
+  Texcoord = Position * vec2(0.5) + vec2(0.5);  // Map from [-1, +1] to [0, 1].
+  gl_Position = vec4(Position, 0.0, 1.0);
+}
diff --git a/gfx/src/error.c b/gfx/src/error.c
new file mode 100644
index 0000000..3f11747
--- /dev/null
+++ b/gfx/src/error.c
@@ -0,0 +1,5 @@
+#include <gfx/error.h>
+
+xlstring gfx_error;
+
+const char* gfx_get_error(void) { return xlstring_cstring(&gfx_error); }
diff --git a/gfx/src/gfx.c b/gfx/src/gfx.c
new file mode 100644
index 0000000..8321f86
--- /dev/null
+++ b/gfx/src/gfx.c
@@ -0,0 +1,87 @@
+#include <gfx/gfx.h>
+
+#include "render/render_backend_impl.h"
+#include "renderer/renderer_impl.h"
+#include "scene/scene_graph.h"
+#include "scene/scene_impl.h"
+#include "scene/scene_memory.h"
+
+#include <cstring.h>
+#include <log/log.h>
+
+#include <assert.h>
+#include <stdlib.h>
+
+typedef struct Gfx {
+  RenderBackend render_backend;
+  Renderer renderer;
+  scene_idx scene; // First child scene.
+} Gfx;
+
+Gfx* gfx_init() {
+  if (!gladLoadGL()) {
+    LOGE("Failed loading glad!");
+    return 0;
+  }
+
+  Gfx* gfx = calloc(1, sizeof(Gfx));
+  if (!gfx) {
+    return 0;
+  }
+  gfx_init_render_backend(&gfx->render_backend);
+  if (!renderer_make(&gfx->renderer, &gfx->render_backend)) {
+    gfx_destroy(&gfx);
+    return 0;
+  }
+  scene_mem_init();
+  return gfx;
+}
+
+void gfx_destroy(Gfx** gfx) {
+  assert(gfx);
+  if (!gfx) {
+    return;
+  }
+  // Destroy scenes for convenience.
+  for (scene_idx scene_index = (*gfx)->scene; scene_index.val;) {
+    Scene* scene = mem_get_scene(scene_index);
+    scene_index = scene->next;
+    gfx_destroy_scene(*gfx, &scene);
+  }
+  scene_mem_destroy();
+  renderer_destroy(&(*gfx)->renderer, &(*gfx)->render_backend);
+  gfx_del_render_backend(&(*gfx)->render_backend);
+  free(*gfx);
+  *gfx = 0;
+}
+
+RenderBackend* gfx_get_render_backend(Gfx* gfx) {
+  assert(gfx);
+  return &gfx->render_backend;
+}
+
+Renderer* gfx_get_renderer(Gfx* gfx) {
+  assert(gfx);
+  return &gfx->renderer;
+}
+
+Scene* gfx_make_scene(Gfx* gfx) {
+  Scene* scene = mem_alloc_scene();
+  if (!scene) {
+    return 0;
+  }
+  scene_make(scene);
+  LIST_PREPEND(gfx->scene, scene);
+  return scene;
+}
+
+void gfx_destroy_scene(Gfx* gfx, Scene** scene) {
+  assert(scene);
+  scene_destroy(*scene);
+  const scene_idx scene_index = mem_get_scene_index(*scene);
+  if (gfx->scene.val == scene_index.val) {
+    gfx->scene.val = 0;
+  }
+  LIST_REMOVE(*scene);
+  mem_free_scene(scene);
+}
diff --git a/gfx/src/render/buffer.c b/gfx/src/render/buffer.c
new file mode 100644
index 0000000..d027e8b
--- /dev/null
+++ b/gfx/src/render/buffer.c
@@ -0,0 +1,57 @@
+#include "buffer.h"
+
+#include <math/vec2.h>
+#include <math/vec3.h>
+#include <math/vec4.h>
+
+bool gfx_init_buffer(Buffer* buffer, const void* data, size_t size_bytes) {
+  assert(buffer);
+  buffer->size_bytes = size_bytes;
+  glGenBuffers(1, &buffer->vbo);
+  glBindBuffer(GL_ARRAY_BUFFER, buffer->vbo);
+  glBufferData(GL_ARRAY_BUFFER, size_bytes, data, GL_STATIC_DRAW);
+  glBindBuffer(GL_ARRAY_BUFFER, 0);
+  ASSERT_GL;
+  return true;
+}
+
+bool gfx_init_buffer_2d(Buffer* buffer, const vec2* verts, size_t count) {
+  assert(buffer);
+  buffer->size_bytes = count * sizeof(vec2);
+  glGenBuffers(1, &buffer->vbo);
+  glBindBuffer(GL_ARRAY_BUFFER, buffer->vbo);
+  glBufferData(GL_ARRAY_BUFFER, sizeof(vec2) * count, verts, GL_STATIC_DRAW);
+  glBindBuffer(GL_ARRAY_BUFFER, 0);
+  ASSERT_GL;
+  return true;
+}
+
+bool gfx_init_buffer_3d(Buffer* buffer, const vec3* verts, size_t count) {
+  assert(buffer);
+  buffer->size_bytes = count * sizeof(vec3);
+  glGenBuffers(1, &buffer->vbo);
+  glBindBuffer(GL_ARRAY_BUFFER, buffer->vbo);
+  glBufferData(GL_ARRAY_BUFFER, sizeof(vec3) * count, verts, GL_STATIC_DRAW);
+  glBindBuffer(GL_ARRAY_BUFFER, 0);
+  ASSERT_GL;
+  return true;
+}
+
+bool gfx_init_buffer_4d(Buffer* buffer, const vec4* verts, size_t count) {
+  assert(buffer);
+  buffer->size_bytes = count * sizeof(vec4);
+  glGenBuffers(1, &buffer->vbo);
+  glBindBuffer(GL_ARRAY_BUFFER, buffer->vbo);
+  glBufferData(GL_ARRAY_BUFFER, sizeof(vec4) * count, verts, GL_STATIC_DRAW);
+  glBindBuffer(GL_ARRAY_BUFFER, 0);
+  ASSERT_GL;
+  return true;
+}
+
+void gfx_del_buffer(Buffer* buffer) {
+  assert(buffer);
+  if (buffer->vbo) {
+    glDeleteBuffers(1, &buffer->vbo);
+    buffer->vbo = 0;
+  }
+}
diff --git a/gfx/src/render/buffer.h b/gfx/src/render/buffer.h
new file mode 100644
index 0000000..5cff53a
--- /dev/null
+++ b/gfx/src/render/buffer.h
@@ -0,0 +1,28 @@
+#pragma once
+
+#include "gl_util.h"
+
+#include <math/fwd.h>
+
+#include <stdbool.h>
+#include <stddef.h>
+
+typedef struct Buffer {
+  GLuint vbo;
+  size_t size_bytes;
+} Buffer;
+
+/// Create a buffer from raw data.
+bool gfx_init_buffer(Buffer*, const void* data, size_t size_bytes);
+
+/// Create a buffer from 2D vertices.
+bool gfx_init_buffer_2d(Buffer*, const vec2* verts, size_t count);
+
+/// Create a buffer from 3D vertices.
+bool gfx_init_buffer_3d(Buffer*, const vec3* verts, size_t count);
+
+/// Create a buffer from 4D vertices.
+bool gfx_init_buffer_4d(Buffer*, const vec4* verts, size_t count);
+
+/// Destroy the buffer.
+void gfx_del_buffer(Buffer*);
diff --git a/gfx/src/render/constants.h b/gfx/src/render/constants.h
new file mode 100644
index 0000000..b98b0ac
--- /dev/null
+++ b/gfx/src/render/constants.h
@@ -0,0 +1,7 @@
+#pragma once
+
+// Shaders vertex attribute locations must match the channels here.
+#define GFX_POSITION_CHANNEL 0
+#define GFX_NORMAL_CHANNEL 1
+#define GFX_TANGENT_CHANNEL 2
+#define GFX_TEXCOORDS_CHANNEL 3
diff --git a/gfx/src/render/framebuffer.c b/gfx/src/render/framebuffer.c
new file mode 100644
index 0000000..323ef56
--- /dev/null
+++ b/gfx/src/render/framebuffer.c
@@ -0,0 +1,150 @@
+#include "framebuffer.h"
+
+#include "renderbuffer.h"
+#include "texture.h"
+
+#include <gfx/error.h>
+
+#include <assert.h>
+
+static void framebuffer_attach_colour(FrameBuffer* framebuffer,
+                                      const FrameBufferAttachment* attachment) {
+  assert(framebuffer);
+  assert(attachment);
+
+  switch (attachment->type) {
+  case FrameBufferNoAttachment:
+    break;
+  case FrameBufferTexture:
+    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
+                           attachment->texture.texture->id,
+                           attachment->texture.mip_level);
+    break;
+  case FrameBufferCubemapTexture:
+    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+                           to_GL_cubemap_face(attachment->cubemap.face),
+                           attachment->cubemap.texture->id,
+                           attachment->cubemap.mip_level);
+    break;
+  case FrameBufferRenderBuffer:
+    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+                              GL_RENDERBUFFER, attachment->renderbuffer->id);
+    break;
+  }
+
+  ASSERT_GL;
+}
+
+static void framebuffer_attach_depth(FrameBuffer* framebuffer,
+                                     const FrameBufferAttachment* attachment) {
+  assert(framebuffer);
+  assert(attachment);
+
+  switch (attachment->type) {
+  case FrameBufferNoAttachment:
+    break;
+  case FrameBufferTexture:
+    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
+                           GL_DEPTH_COMPONENT, attachment->texture.texture->id,
+                           attachment->texture.mip_level);
+    break;
+  // TODO: Could distinguish between colour and depth attachment types to make
+  // this a compile-time error.
+  case FrameBufferCubemapTexture:
+    gfx_set_error(
+        "Cannot use a cubemap texture as a depth framebuffer attachment");
+    break;
+  case FrameBufferRenderBuffer:
+    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
+                              GL_RENDERBUFFER, attachment->renderbuffer->id);
+    break;
+  }
+
+  ASSERT_GL;
+}
+
+bool gfx_init_framebuffer(FrameBuffer* framebuffer,
+                          const FrameBufferDesc* desc) {
+  assert(framebuffer);
+  assert(desc);
+
+  glGenFramebuffers(1, &framebuffer->id);
+  if (!framebuffer->id) {
+    gfx_set_error("glGenFramebuffers() failed");
+    return false;
+  }
+
+  // Allow incomplete framebuffers for flexibility.
+  // Attach buffers and check the framebuffer status only if buffers are given
+  // up front.
+  if (desc->colour.type != FrameBufferNoAttachment ||
+      desc->depth.type != FrameBufferNoAttachment) {
+    // TODO: Could use the "named" API to avoid having to bind the framebuffer.
+    glBindFramebuffer(GL_FRAMEBUFFER, framebuffer->id);
+    framebuffer_attach_colour(framebuffer, &desc->colour);
+    framebuffer_attach_depth(framebuffer, &desc->depth);
+    if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
+      gfx_set_error("glCheckFramebufferStatus() failed");
+      gfx_del_framebuffer(framebuffer);
+      return false;
+    }
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+  }
+
+  ASSERT_GL;
+  return true;
+}
+
+bool gfx_framebuffer_attach_colour(FrameBuffer* framebuffer,
+                                   const FrameBufferAttachment* attachment) {
+  assert(framebuffer);
+  assert(attachment);
+
+  // TODO: Could use the "named" API to avoid having to bind the framebuffer.
+  glBindFramebuffer(GL_FRAMEBUFFER, framebuffer->id);
+  framebuffer_attach_colour(framebuffer, attachment);
+  if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
+    gfx_set_error("glCheckFramebufferStatus() failed");
+    return false;
+  }
+  return true;
+}
+
+bool gfx_framebuffer_attach_depth(FrameBuffer* framebuffer,
+                                  const FrameBufferAttachment* attachment) {
+  assert(framebuffer);
+  assert(attachment);
+
+  // TODO: Could use the "named" API to avoid having to bind the framebuffer.
+  glBindFramebuffer(GL_FRAMEBUFFER, framebuffer->id);
+  framebuffer_attach_depth(framebuffer, attachment);
+  if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
+    gfx_set_error("glCheckFramebufferStatus() failed");
+    return false;
+  }
+  return true;
+}
+
+void gfx_del_framebuffer(FrameBuffer* framebuffer) {
+  assert(framebuffer);
+  if (framebuffer->id) {
+    glDeleteFramebuffers(1, &framebuffer->id);
+    framebuffer->id = 0;
+  }
+}
+
+void gfx_activate_framebuffer(const FrameBuffer* framebuffer) {
+  assert(framebuffer);
+  glBindFramebuffer(GL_FRAMEBUFFER, framebuffer->id);
+}
+
+void gfx_deactivate_framebuffer(const FrameBuffer* framebuffer) {
+  assert(framebuffer);
+  glBindFramebuffer(GL_FRAMEBUFFER, 0);
+}
+
+void gfx_framebuffer_set_viewport(FrameBuffer* framebuffer, int x, int y,
+                                  int width, int height) {
+  assert(framebuffer);
+  glViewport(x, y, width, height);
+}
diff --git a/gfx/src/render/framebuffer.h b/gfx/src/render/framebuffer.h
new file mode 100644
index 0000000..7153b30
--- /dev/null
+++ b/gfx/src/render/framebuffer.h
@@ -0,0 +1,15 @@
+#pragma once
+
+#include <gfx/render_backend.h>
+
+#include "gl_util.h"
+
+typedef struct FrameBuffer {
+  GLuint id;
+} FrameBuffer;
+
+/// Create a new framebuffer.
+bool gfx_init_framebuffer(FrameBuffer*, const FrameBufferDesc*);
+
+/// Destroy the framebuffer.
+void gfx_del_framebuffer(FrameBuffer*);
diff --git a/gfx/src/render/geometry.c b/gfx/src/render/geometry.c
new file mode 100644
index 0000000..d5b5a95
--- /dev/null
+++ b/gfx/src/render/geometry.c
@@ -0,0 +1,194 @@
+#include "geometry.h"
+
+#include "buffer.h"
+#include "constants.h"
+
+#include <math/vec2.h>
+#include <math/vec3.h>
+
+#define view_is_populated(BUFFER_VIEW) (BUFFER_VIEW.data || BUFFER_VIEW.buffer)
+
+static GLenum primitive_type_to_gl(PrimitiveType type) {
+  switch (type) {
+  case Triangles:
+    return GL_TRIANGLES;
+  case TriangleFan:
+    return GL_TRIANGLE_FAN;
+  case TriangleStrip:
+    return GL_TRIANGLE_STRIP;
+  default:
+    LOGE("primitive_type_to_gl(): missing case");
+    return GL_INVALID_ENUM;
+  }
+}
+
+static const Buffer* get_or_make_buffer2d(RenderBackend* render_backend,
+                                          const BufferView2d* view) {
+  if (view->buffer) {
+    return view->buffer;
+  } else {
+    return gfx_make_buffer2d(render_backend, view->data,
+                             view->size_bytes / sizeof(vec2));
+  }
+}
+
+static const Buffer* get_or_make_buffer3d(RenderBackend* render_backend,
+                                          const BufferView3d* view) {
+  if (view->buffer) {
+    return view->buffer;
+  } else {
+    return gfx_make_buffer3d(render_backend, view->data,
+                             view->size_bytes / sizeof(vec3));
+  }
+}
+
+static const Buffer* get_or_make_buffer4d(RenderBackend* render_backend,
+                                          const BufferView4d* view) {
+  if (view->buffer) {
+    return view->buffer;
+  } else {
+    return gfx_make_buffer4d(render_backend, view->data,
+                             view->size_bytes / sizeof(vec4));
+  }
+}
+
+static const Buffer* get_or_make_buffer_idx(RenderBackend* render_backend,
+                                            const BufferViewIdx* view) {
+  if (view->buffer) {
+    return view->buffer;
+  } else {
+    return gfx_make_buffer(render_backend, view->data, view->size_bytes);
+  }
+}
+
+bool gfx_init_geometry(Geometry* geometry, RenderBackend* render_backend,
+                       const GeometryDesc* desc) {
+  assert(geometry);
+  assert(render_backend);
+  assert(desc);
+  assert(view_is_populated(desc->positions3d) ||
+         view_is_populated(desc->positions2d));
+  assert(desc->num_verts > 0);
+
+  geometry->mode = primitive_type_to_gl(desc->type);
+  geometry->num_verts = desc->num_verts;
+  geometry->num_indices = desc->num_indices;
+  geometry->indices_offset_bytes = desc->indices.offset_bytes;
+
+  glGenVertexArrays(1, &geometry->vao);
+  glBindVertexArray(geometry->vao);
+
+  if (view_is_populated(desc->positions3d)) {
+    assert(desc->num_verts <= desc->positions3d.size_bytes / sizeof(vec3));
+    geometry->positions =
+        get_or_make_buffer3d(render_backend, &desc->positions3d);
+    if (!geometry->positions) {
+      gfx_del_geometry(geometry);
+      return false;
+    }
+    assert(desc->positions3d.size_bytes <= geometry->positions->size_bytes);
+    glBindBuffer(GL_ARRAY_BUFFER, geometry->positions->vbo);
+    glEnableVertexAttribArray(GFX_POSITION_CHANNEL);
+    glVertexAttribPointer(GFX_POSITION_CHANNEL, 3, GL_FLOAT, GL_FALSE,
+                          desc->positions3d.stride_bytes,
+                          (const void*)desc->positions3d.offset_bytes);
+  } else if (view_is_populated(desc->positions2d)) {
+    assert(desc->num_verts <= desc->positions2d.size_bytes / sizeof(vec2));
+    geometry->positions =
+        get_or_make_buffer2d(render_backend, &desc->positions2d);
+    if (!geometry->positions) {
+      gfx_del_geometry(geometry);
+      return false;
+    }
+    assert(desc->positions2d.size_bytes <= geometry->positions->size_bytes);
+    glBindBuffer(GL_ARRAY_BUFFER, geometry->positions->vbo);
+    glEnableVertexAttribArray(GFX_POSITION_CHANNEL);
+    glVertexAttribPointer(GFX_POSITION_CHANNEL, 2, GL_FLOAT, GL_FALSE,
+                          desc->positions2d.stride_bytes,
+                          (const void*)desc->positions2d.offset_bytes);
+  }
+
+  if (view_is_populated(desc->normals)) {
+    assert(desc->num_verts <= desc->normals.size_bytes / sizeof(vec3));
+    geometry->normals = get_or_make_buffer3d(render_backend, &desc->normals);
+    if (!geometry->normals) {
+      gfx_del_geometry(geometry);
+      return false;
+    }
+    assert(desc->normals.size_bytes <= geometry->normals->size_bytes);
+    glBindBuffer(GL_ARRAY_BUFFER, geometry->normals->vbo);
+    glEnableVertexAttribArray(GFX_NORMAL_CHANNEL);
+    glVertexAttribPointer(GFX_NORMAL_CHANNEL, 3, GL_FLOAT, GL_FALSE,
+                          desc->normals.stride_bytes,
+                          (const void*)desc->normals.offset_bytes);
+  }
+
+  if (view_is_populated(desc->tangents)) {
+    assert(desc->num_verts <= desc->tangents.size_bytes / sizeof(vec3));
+    geometry->tangents = get_or_make_buffer4d(render_backend, &desc->tangents);
+    if (!geometry->tangents) {
+      gfx_del_geometry(geometry);
+      return false;
+    }
+    assert(desc->tangents.size_bytes <= geometry->tangents->size_bytes);
+    glBindBuffer(GL_ARRAY_BUFFER, geometry->tangents->vbo);
+    glEnableVertexAttribArray(GFX_TANGENT_CHANNEL);
+    glVertexAttribPointer(GFX_TANGENT_CHANNEL, 4, GL_FLOAT, GL_FALSE,
+                          desc->tangents.stride_bytes,
+                          (const void*)desc->tangents.offset_bytes);
+  }
+
+  if (view_is_populated(desc->texcoords)) {
+    assert(desc->num_verts <= desc->texcoords.size_bytes / sizeof(vec2));
+    geometry->texcoords =
+        get_or_make_buffer2d(render_backend, &desc->texcoords);
+    if (!geometry->texcoords) {
+      gfx_del_geometry(geometry);
+      return false;
+    }
+    assert(desc->texcoords.size_bytes <= geometry->texcoords->size_bytes);
+    glBindBuffer(GL_ARRAY_BUFFER, geometry->texcoords->vbo);
+    glEnableVertexAttribArray(GFX_TEXCOORDS_CHANNEL);
+    glVertexAttribPointer(GFX_TEXCOORDS_CHANNEL, 2, GL_FLOAT, GL_FALSE,
+                          desc->texcoords.stride_bytes,
+                          (const void*)desc->texcoords.offset_bytes);
+  }
+
+  glBindBuffer(GL_ARRAY_BUFFER, 0);
+
+  if (view_is_populated(desc->indices)) {
+    assert(desc->num_indices > 0);
+    assert(desc->num_indices <= desc->indices.size_bytes / sizeof(VertexIndex));
+    geometry->indices = get_or_make_buffer_idx(render_backend, &desc->indices);
+    if (!geometry->indices) {
+      gfx_del_geometry(geometry);
+      return false;
+    }
+    assert(desc->indices.size_bytes <= geometry->indices->size_bytes);
+  }
+
+  glBindVertexArray(0);
+  ASSERT_GL;
+  return geometry;
+}
+
+void gfx_del_geometry(Geometry* geometry) {
+  assert(geometry);
+  if (geometry->vao) {
+    glDeleteVertexArrays(1, &geometry->vao);
+    geometry->vao = 0;
+  }
+}
+
+void gfx_render_geometry(const Geometry* geometry) {
+  assert(geometry);
+  assert(geometry->vao);
+  glBindVertexArray(geometry->vao);
+  if (geometry->indices) {
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, geometry->indices->vbo);
+    glDrawElements(geometry->mode, geometry->num_indices, GL_UNSIGNED_SHORT,
+                   (const void*)geometry->indices_offset_bytes);
+  } else {
+    glDrawArrays(geometry->mode, 0, geometry->num_verts);
+  }
+}
diff --git a/gfx/src/render/geometry.h b/gfx/src/render/geometry.h
new file mode 100644
index 0000000..a6f7e05
--- /dev/null
+++ b/gfx/src/render/geometry.h
@@ -0,0 +1,35 @@
+#pragma once
+
+#include <gfx/render_backend.h>
+
+#include "gl_util.h"
+
+#include <stdbool.h>
+
+/// A piece of renderable geometry.
+///
+/// The Geometry does not own its buffers, since buffers are typically shared
+/// to reduce the memory footprint and the number of draw calls. More generally,
+/// the renderer assumes ownership of all rendering resources, which simplifies
+/// their management.
+typedef struct Geometry {
+  GLuint vao;
+  GLenum mode;
+  VertexCount num_verts;
+  size_t num_indices;
+  size_t indices_offset_bytes;
+  // Buffer pointers are no longer needed once the VAO is created, but we store
+  // them here so that we can keep track of what Geometry objects use what
+  // Buffer objects.
+  const Buffer* positions;
+  const Buffer* normals;
+  const Buffer* tangents;
+  const Buffer* texcoords;
+  const Buffer* indices;
+} Geometry;
+
+/// Create new geometry.
+bool gfx_init_geometry(Geometry*, RenderBackend*, const GeometryDesc*);
+
+/// Destroy the geometry.
+void gfx_del_geometry(Geometry*);
diff --git a/gfx/src/render/gl_util.h b/gfx/src/render/gl_util.h
new file mode 100644
index 0000000..a3cc629
--- /dev/null
+++ b/gfx/src/render/gl_util.h
@@ -0,0 +1,47 @@
+#pragma once
+
+#include <glad/glad.h>
+#include <log/log.h>
+
+#include <assert.h>
+
+#define GFX_GL_CONTEXT_PC 1
+#define GFX_GL_CONTEXT_ES 2
+
+#ifndef GFX_GL_CONTEXT
+#define GFX_GL_CONTEXT GFX_GL_CONTEXT_PC
+#endif // GFX_GL_CONTEXT
+
+/// Log an error if an OpenGL has occurred.
+#ifndef NDEBUG
+#define ASSERT_GL                                                              \
+  {                                                                            \
+    GLenum e = glGetError();                                                   \
+    switch (e) {                                                               \
+    case GL_NO_ERROR:                                                          \
+      break;                                                                   \
+    case GL_INVALID_ENUM:                                                      \
+      LOGE("GL_INVALID_ENUM");                                                 \
+      break;                                                                   \
+    case GL_INVALID_VALUE:                                                     \
+      LOGE("GL_INVALID_VALUE");                                                \
+      break;                                                                   \
+    case GL_INVALID_OPERATION:                                                 \
+      LOGE("GL_INVALID_OPERATION");                                            \
+      break;                                                                   \
+    case GL_INVALID_FRAMEBUFFER_OPERATION:                                     \
+      LOGE("GL_INVALID_FRAMEBUFFER_OPERATION");                                \
+      break;                                                                   \
+    case GL_OUT_OF_MEMORY:                                                     \
+      LOGE("GL_OUT_OF_MEMORY");                                                \
+      break;                                                                   \
+    /*case GL_STACK_UNDERFLOW: LOGE("GL_STACK_UNDERFLOW");*/                   \
+    /*case GL_STACK_OVERFLOW: LOGE("GL_STACK_OVERFLOW");*/                     \
+    default:                                                                   \
+      LOGE("Unknown OpenGL error");                                            \
+      break;                                                                   \
+    }                                                                          \
+  }
+#else // Not NDEBUG.
+#define ASSERT_GL
+#endif
diff --git a/gfx/src/render/render_backend.c b/gfx/src/render/render_backend.c
new file mode 100644
index 0000000..c79de7d
--- /dev/null
+++ b/gfx/src/render/render_backend.c
@@ -0,0 +1,317 @@
+#include "render_backend_impl.h"
+
+#include "gl_util.h"
+
+#include <GL/gl.h>
+#include <log/log.h>
+
+#include <assert.h>
+
+void gfx_init_render_backend(RenderBackend* render_backend) {
+  assert(render_backend);
+  mempool_make(&render_backend->buffers);
+  mempool_make(&render_backend->framebuffers);
+  mempool_make(&render_backend->geometries);
+  mempool_make(&render_backend->renderbuffers);
+  mempool_make(&render_backend->shaders);
+  mempool_make(&render_backend->shader_programs);
+  mempool_make(&render_backend->textures);
+
+  glEnable(GL_CULL_FACE);
+  glFrontFace(GL_CCW);
+  glCullFace(GL_BACK);
+
+  glEnable(GL_DEPTH_TEST);
+
+  // Filter cubemaps across their faces to avoid seams.
+  // https://www.khronos.org/opengl/wiki/Cubemap_Texture#Seamless_cubemap
+  glEnable(GL_TEXTURE_CUBE_MAP_SEAMLESS);
+}
+
+// Conveniently destroy any objects that have not been destroyed by the
+// application.
+void gfx_del_render_backend(RenderBackend* render_backend) {
+  assert(render_backend);
+
+  mempool_foreach(&render_backend->buffers, buffer,
+                  { gfx_del_buffer(buffer); });
+
+  mempool_foreach(&render_backend->framebuffers, framebuffer,
+                  { gfx_del_framebuffer(framebuffer); });
+
+  mempool_foreach(&render_backend->geometries, geometry,
+                  { gfx_del_geometry(geometry); });
+
+  mempool_foreach(&render_backend->renderbuffers, renderbuffer,
+                  { gfx_del_renderbuffer(renderbuffer); });
+
+  mempool_foreach(&render_backend->shader_programs, prog,
+                  { gfx_del_shader_program(prog); });
+
+  mempool_foreach(&render_backend->shaders, shader,
+                  { gfx_del_shader(shader); });
+
+  mempool_foreach(&render_backend->textures, texture,
+                  { gfx_del_texture(texture); });
+}
+
+// -----------------------------------------------------------------------------
+// Render commands.
+// -----------------------------------------------------------------------------
+
+void gfx_start_frame(RenderBackend* render_backend) {
+  assert(render_backend);
+
+  glViewport(0, 0, render_backend->viewport.width,
+             render_backend->viewport.height);
+  glClearColor(0, 0, 0, 0);
+  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+  ASSERT_GL;
+}
+
+void gfx_end_frame(RenderBackend* render_backend) {
+  assert(render_backend);
+  ASSERT_GL;
+}
+
+void gfx_set_viewport(RenderBackend* render_backend, int width, int height) {
+  assert(render_backend);
+  render_backend->viewport.width = width;
+  render_backend->viewport.height = height;
+}
+
+void gfx_get_viewport(RenderBackend* render_backend, int* width, int* height) {
+  assert(render_backend);
+  assert(width);
+  assert(height);
+  *width = render_backend->viewport.width;
+  *height = render_backend->viewport.height;
+}
+
+// -----------------------------------------------------------------------------
+// Buffers.
+// -----------------------------------------------------------------------------
+
+Buffer* gfx_make_buffer(RenderBackend* render_backend, const void* data,
+                        size_t size_bytes) {
+  assert(render_backend);
+  Buffer* buffer = mempool_alloc(&render_backend->buffers);
+  if (!buffer) {
+    return 0;
+  }
+  if (!gfx_init_buffer(buffer, data, size_bytes)) {
+    mempool_free(&render_backend->buffers, &buffer);
+    return 0;
+  }
+  return buffer;
+}
+
+Buffer* gfx_make_buffer2d(RenderBackend* render_backend, const vec2* verts,
+                          size_t count) {
+  assert(render_backend);
+  Buffer* buffer = mempool_alloc(&render_backend->buffers);
+  if (!buffer) {
+    return 0;
+  }
+  if (!gfx_init_buffer_2d(buffer, verts, count)) {
+    mempool_free(&render_backend->buffers, &buffer);
+    return 0;
+  }
+  return buffer;
+}
+
+Buffer* gfx_make_buffer3d(RenderBackend* render_backend, const vec3* verts,
+                          size_t count) {
+  assert(render_backend);
+  Buffer* buffer = mempool_alloc(&render_backend->buffers);
+  if (!buffer) {
+    return 0;
+  }
+  if (!gfx_init_buffer_3d(buffer, verts, count)) {
+    mempool_free(&render_backend->buffers, &buffer);
+    return 0;
+  }
+  return buffer;
+}
+
+Buffer* gfx_make_buffer4d(RenderBackend* render_backend, const vec4* verts,
+                          size_t count) {
+  assert(render_backend);
+  Buffer* buffer = mempool_alloc(&render_backend->buffers);
+  if (!buffer) {
+    return 0;
+  }
+  if (!gfx_init_buffer_4d(buffer, verts, count)) {
+    mempool_free(&render_backend->buffers, &buffer);
+    return 0;
+  }
+  return buffer;
+}
+
+void gfx_destroy_buffer(RenderBackend* render_backend, Buffer** buffer) {
+  assert(render_backend);
+  assert(buffer);
+  gfx_del_buffer(*buffer);
+  mempool_free(&render_backend->buffers, buffer);
+}
+
+// -----------------------------------------------------------------------------
+// Geometry.
+// -----------------------------------------------------------------------------
+
+Geometry* gfx_make_geometry(RenderBackend* render_backend,
+                            const GeometryDesc* desc) {
+  assert(render_backend);
+  assert(desc);
+  Geometry* geometry = mempool_alloc(&render_backend->geometries);
+  if (!geometry) {
+    return 0;
+  }
+  if (!gfx_init_geometry(geometry, render_backend, desc)) {
+    mempool_free(&render_backend->geometries, &geometry);
+    return 0;
+  }
+  return geometry;
+}
+
+void gfx_destroy_geometry(RenderBackend* render_backend, Geometry** geometry) {
+  assert(render_backend);
+  assert(geometry);
+  gfx_del_geometry(*geometry);
+  mempool_free(&render_backend->geometries, geometry);
+}
+
+// -----------------------------------------------------------------------------
+// Textures.
+// -----------------------------------------------------------------------------
+
+Texture* gfx_make_texture(RenderBackend* render_backend,
+                          const TextureDesc* desc) {
+  assert(render_backend);
+  assert(desc);
+  Texture* texture = mempool_alloc(&render_backend->textures);
+  if (!texture) {
+    return 0;
+  }
+  if (!gfx_init_texture(texture, desc)) {
+    mempool_free(&render_backend->textures, &texture);
+    return 0;
+  }
+  return texture;
+}
+
+void gfx_destroy_texture(RenderBackend* render_backend, Texture** texture) {
+  assert(render_backend);
+  assert(texture);
+  assert(*texture);
+  gfx_del_texture(*texture);
+  mempool_free(&render_backend->textures, texture);
+}
+
+// -----------------------------------------------------------------------------
+// Renderbuffers.
+// -----------------------------------------------------------------------------
+
+RenderBuffer* gfx_make_renderbuffer(RenderBackend* render_backend,
+                                    const RenderBufferDesc* desc) {
+  assert(render_backend);
+  assert(desc);
+  RenderBuffer* renderbuffer = mempool_alloc(&render_backend->renderbuffers);
+  if (!renderbuffer) {
+    return 0;
+  }
+  if (!gfx_init_renderbuffer(renderbuffer, desc)) {
+    mempool_free(&render_backend->renderbuffers, &renderbuffer);
+  }
+  return renderbuffer;
+}
+
+void gfx_destroy_renderbuffer(RenderBackend* render_backend,
+                              RenderBuffer** renderbuffer) {
+  assert(render_backend);
+  assert(renderbuffer);
+  assert(*renderbuffer);
+  gfx_del_renderbuffer(*renderbuffer);
+  mempool_free(&render_backend->renderbuffers, renderbuffer);
+}
+
+// -----------------------------------------------------------------------------
+// Framebuffers.
+// -----------------------------------------------------------------------------
+
+FrameBuffer* gfx_make_framebuffer(RenderBackend* render_backend,
+                                  const FrameBufferDesc* desc) {
+  assert(render_backend);
+  assert(desc);
+  FrameBuffer* framebuffer = mempool_alloc(&render_backend->framebuffers);
+  if (!framebuffer) {
+    return 0;
+  }
+  if (!gfx_init_framebuffer(framebuffer, desc)) {
+    mempool_free(&render_backend->framebuffers, &framebuffer);
+    return 0;
+  }
+  return framebuffer;
+}
+
+void gfx_destroy_framebuffer(RenderBackend* render_backend,
+                             FrameBuffer** framebuffer) {
+  assert(render_backend);
+  assert(framebuffer);
+  assert(*framebuffer);
+  gfx_del_framebuffer(*framebuffer);
+  mempool_free(&render_backend->framebuffers, framebuffer);
+}
+
+void gfx_activate_framebuffer(const FrameBuffer* framebuffer);
+
+// -----------------------------------------------------------------------------
+// Shaders.
+// -----------------------------------------------------------------------------
+
+Shader* gfx_make_shader(RenderBackend* render_backend, const ShaderDesc* desc) {
+  assert(render_backend);
+  assert(desc);
+  Shader* shader = mempool_alloc(&render_backend->shaders);
+  if (!shader) {
+    return 0;
+  }
+  if (!gfx_compile_shader(shader, desc)) {
+    mempool_free(&render_backend->shaders, &shader);
+    return 0;
+  }
+  return shader;
+}
+
+void gfx_destroy_shader(RenderBackend* render_backend, Shader** shader) {
+  assert(render_backend);
+  assert(shader);
+  assert(*shader);
+  gfx_del_shader(*shader);
+  mempool_free(&render_backend->shaders, shader);
+}
+
+ShaderProgram* gfx_make_shader_program(RenderBackend* render_backend,
+                                       const ShaderProgramDesc* desc) {
+  assert(render_backend);
+  assert(desc);
+  ShaderProgram* prog = mempool_alloc(&render_backend->shader_programs);
+  if (!prog) {
+    return 0;
+  }
+  if (!gfx_build_shader_program(prog, desc)) {
+    mempool_free(&render_backend->shader_programs, &prog);
+    return 0;
+  }
+  return prog;
+}
+
+void gfx_destroy_shader_program(RenderBackend* render_backend,
+                                ShaderProgram** prog) {
+  assert(render_backend);
+  assert(prog);
+  assert(*prog);
+  gfx_del_shader_program(*prog);
+  mempool_free(&render_backend->shader_programs, prog);
+}
diff --git a/gfx/src/render/render_backend_impl.h b/gfx/src/render/render_backend_impl.h
new file mode 100644
index 0000000..6d13367
--- /dev/null
+++ b/gfx/src/render/render_backend_impl.h
@@ -0,0 +1,45 @@
+#pragma once
+
+#include <gfx/render_backend.h>
+#include <gfx/sizes.h>
+
+#include "buffer.h"
+#include "framebuffer.h"
+#include "geometry.h"
+#include "renderbuffer.h"
+#include "shader.h"
+#include "shader_program.h"
+#include "texture.h"
+
+#include <mempool.h>
+
+DEF_MEMPOOL(buffer_pool, Buffer, GFX_MAX_NUM_BUFFERS)
+DEF_MEMPOOL(framebuffer_pool, FrameBuffer, GFX_MAX_NUM_FRAMEBUFFERS)
+DEF_MEMPOOL(geometry_pool, Geometry, GFX_MAX_NUM_GEOMETRIES)
+DEF_MEMPOOL(renderbuffer_pool, RenderBuffer, GFX_MAX_NUM_RENDERBUFFERS)
+DEF_MEMPOOL(shader_pool, Shader, GFX_MAX_NUM_SHADERS)
+DEF_MEMPOOL(shader_program_pool, ShaderProgram, GFX_MAX_NUM_SHADER_PROGRAMS)
+DEF_MEMPOOL(texture_pool, Texture, GFX_MAX_NUM_TEXTURES)
+
+typedef struct {
+  int width;
+  int height;
+} Viewport;
+
+typedef struct RenderBackend {
+  Viewport viewport;
+  // mempools for render-specific objects: textures, geometry, etc.
+  buffer_pool buffers;
+  framebuffer_pool framebuffers;
+  geometry_pool geometries;
+  renderbuffer_pool renderbuffers;
+  shader_pool shaders;
+  shader_program_pool shader_programs;
+  texture_pool textures;
+} RenderBackend;
+
+/// Create a new render backend.
+void gfx_init_render_backend(RenderBackend*);
+
+/// Destroy the render backend.
+void gfx_del_render_backend(RenderBackend*);
diff --git a/gfx/src/render/renderbuffer.c b/gfx/src/render/renderbuffer.c
new file mode 100644
index 0000000..3b19483
--- /dev/null
+++ b/gfx/src/render/renderbuffer.c
@@ -0,0 +1,34 @@
+#include "renderbuffer.h"
+
+#include "texture.h"
+
+#include <gfx/error.h>
+
+bool gfx_init_renderbuffer(RenderBuffer* renderbuffer,
+                           const RenderBufferDesc* desc) {
+  assert(renderbuffer);
+  assert(desc);
+
+  glGenRenderbuffers(1, &renderbuffer->id);
+  if (!renderbuffer->id) {
+    gfx_set_error("glGenRenderbuffers failed");
+    return false;
+  }
+
+  glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer->id);
+  glRenderbufferStorage(GL_RENDERBUFFER,
+                        to_GL_internal_format(desc->texture_format),
+                        desc->width, desc->height);
+  glBindRenderbuffer(GL_RENDERBUFFER, 0);
+
+  ASSERT_GL;
+  return true;
+}
+
+void gfx_del_renderbuffer(RenderBuffer* renderbuffer) {
+  assert(renderbuffer);
+  if (renderbuffer->id) {
+    glDeleteRenderbuffers(1, &renderbuffer->id);
+    renderbuffer->id = 0;
+  }
+}
diff --git a/gfx/src/render/renderbuffer.h b/gfx/src/render/renderbuffer.h
new file mode 100644
index 0000000..458dc83
--- /dev/null
+++ b/gfx/src/render/renderbuffer.h
@@ -0,0 +1,15 @@
+#pragma once
+
+#include <gfx/render_backend.h>
+
+#include "gl_util.h"
+
+typedef struct RenderBuffer {
+  GLuint id;
+} RenderBuffer;
+
+/// Create a new renderbuffer.
+bool gfx_init_renderbuffer(RenderBuffer*, const RenderBufferDesc*);
+
+/// Destroy the renderbuffer.
+void gfx_del_renderbuffer(RenderBuffer*);
diff --git a/gfx/src/render/shader.c b/gfx/src/render/shader.c
new file mode 100644
index 0000000..73bc86c
--- /dev/null
+++ b/gfx/src/render/shader.c
@@ -0,0 +1,74 @@
+#include "shader.h"
+
+#include "gl_util.h"
+
+#include <log/log.h>
+
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+
+static GLenum shader_type_to_gl(ShaderType type) {
+  switch (type) {
+  case VertexShader:
+    return GL_VERTEX_SHADER;
+  case FragmentShader:
+    return GL_FRAGMENT_SHADER;
+  default:
+    LOGE("shader_type_to_gl(): missing case");
+    return GL_INVALID_ENUM;
+  }
+}
+
+/// Creates an OpenGL shader.
+/// Returns non-zero on success, 0 on failure.
+static GLuint create_shader(const ShaderDesc* desc) {
+  const GLuint shader = glCreateShader(shader_type_to_gl(desc->type));
+  if (!shader) {
+    return 0;
+  }
+
+#if GFX_GL_CONTEXT == GFX_GL_CONTEXT_ES
+  const char* header = "#version 300 es\n\nprecision highp float;";
+#else
+  const char* header = "#version 400 core\n\n";
+#endif
+
+  const char* source_bits[] = {header, desc->code};
+  const GLint source_lengths[] = {strlen(header), strlen(desc->code)};
+
+  glShaderSource(shader, 2, source_bits, source_lengths);
+  glCompileShader(shader);
+  GLint result;
+  glGetShaderiv(shader, GL_COMPILE_STATUS, &result);
+  if (result == GL_FALSE) {
+    GLint log_len;
+    glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &log_len);
+    if (log_len > 0) {
+      char* log = calloc(log_len, sizeof(char));
+      glGetShaderInfoLog(shader, log_len, NULL, log);
+      LOGE("Failed loading shader: %s\n\nShader code: %s", log, desc->code);
+      free(log);
+    } else {
+      LOGE("Failed loading shader: %s", desc->code);
+    }
+    glDeleteShader(shader);
+    return 0;
+  }
+  ASSERT_GL;
+  return shader;
+}
+
+bool gfx_compile_shader(Shader* shader, const ShaderDesc* desc) {
+  shader->id = create_shader(desc);
+  return shader->id != 0;
+}
+
+void gfx_del_shader(Shader* shader) {
+  assert(shader);
+  if (shader->id) {
+    glDeleteShader(shader->id);
+    shader->id = 0;
+  }
+  ASSERT_GL;
+}
diff --git a/gfx/src/render/shader.h b/gfx/src/render/shader.h
new file mode 100644
index 0000000..a1aaec2
--- /dev/null
+++ b/gfx/src/render/shader.h
@@ -0,0 +1,17 @@
+#pragma once
+
+#include <gfx/render_backend.h>
+
+#include "gl_util.h"
+
+#include <stdbool.h>
+
+typedef struct Shader {
+  GLuint id;
+} Shader;
+
+/// Compile a new shader.
+bool gfx_compile_shader(Shader*, const ShaderDesc*);
+
+/// Destroy the shader.
+void gfx_del_shader(Shader*);
diff --git a/gfx/src/render/shader_program.c b/gfx/src/render/shader_program.c
new file mode 100644
index 0000000..05cfd5a
--- /dev/null
+++ b/gfx/src/render/shader_program.c
@@ -0,0 +1,264 @@
+#include "shader_program.h"
+
+#include "gl_util.h"
+#include "shader.h"
+#include "texture.h"
+
+#include <log/log.h>
+
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+
+/// Creates an OpenGL shader program.
+/// Returns non-zero on success, 0 on failure.
+static GLuint create_program(GLuint vertex_shader, GLuint fragment_shader) {
+  const GLuint prog = glCreateProgram();
+  if (prog == 0) {
+    LOGE("Failed creating shader program");
+    return 0;
+  }
+  glAttachShader(prog, vertex_shader);
+  glAttachShader(prog, fragment_shader);
+  glLinkProgram(prog);
+  GLint result;
+  glGetProgramiv(prog, GL_LINK_STATUS, &result);
+  if (result == GL_FALSE) {
+    GLint log_len;
+    glGetProgramiv(prog, GL_INFO_LOG_LENGTH, &log_len);
+    if (log_len > 0) {
+      char* log = calloc(log_len, sizeof(char));
+      glGetProgramInfoLog(prog, log_len, NULL, log);
+      LOGE("Failed creating shader program: %s", log);
+      free(log);
+    } else {
+      LOGE("Failed creating shader program");
+    }
+    glDeleteProgram(prog);
+    return 0;
+  }
+  ASSERT_GL;
+  return prog;
+}
+
+bool gfx_build_shader_program(ShaderProgram* prog,
+                              const ShaderProgramDesc* desc) {
+  assert(prog);
+  assert(desc);
+  prog->id = create_program(desc->vertex_shader->id, desc->fragment_shader->id);
+  return prog->id != 0;
+}
+
+void gfx_del_shader_program(ShaderProgram* prog) {
+  assert(prog);
+  if (prog->id) {
+    glDeleteProgram(prog->id);
+    prog->id = 0;
+  }
+  ASSERT_GL;
+}
+
+void gfx_activate_shader_program(const ShaderProgram* prog) {
+  assert(prog);
+  glUseProgram(prog->id);
+  ASSERT_GL;
+}
+
+void gfx_deactivate_shader_program(const ShaderProgram* prog) {
+  assert(prog);
+  glUseProgram(0);
+  ASSERT_GL;
+}
+
+static void set_texture_uniform(GLuint prog, const char* name, int texture_unit,
+                                const Texture* texture) {
+  assert(prog != 0);
+  assert(name);
+  assert(texture);
+  const GLint location = glGetUniformLocation(prog, name);
+  if (location >= 0) {
+    glActiveTexture(GL_TEXTURE0 + texture_unit);
+    glBindTexture(texture->target, texture->id);
+    glUniform1i(location, texture_unit);
+  }
+}
+
+static void set_mat4_uniform(GLuint prog, const char* name, const mat4* mat) {
+  assert(prog != 0);
+  assert(name);
+  assert(mat);
+  const GLint location = glGetUniformLocation(prog, name);
+  if (location >= 0) {
+    glUniformMatrix4fv(location, 1, GL_FALSE, (const float*)mat);
+  }
+}
+
+static void set_vec3_uniform(GLuint prog, const char* name, vec3 value) {
+  assert(prog != 0);
+  assert(name);
+  const GLint location = glGetUniformLocation(prog, name);
+  if (location >= 0) {
+    glUniform3f(location, value.x, value.y, value.z);
+  }
+}
+
+static void set_vec4_uniform(GLuint prog, const char* name, vec4 value) {
+  assert(prog != 0);
+  assert(name);
+  const GLint location = glGetUniformLocation(prog, name);
+  if (location >= 0) {
+    glUniform4f(location, value.x, value.y, value.z, value.w);
+  }
+}
+
+static void set_float_uniform(GLuint prog, const char* name, float value) {
+  assert(prog != 0);
+  assert(name);
+  const GLint location = glGetUniformLocation(prog, name);
+  if (location >= 0) {
+    glUniform1f(location, value);
+  }
+}
+
+void gfx_apply_uniforms(const ShaderProgram* prog) {
+  assert(prog);
+  int next_texture_unit = 0;
+  for (int i = 0; i < prog->num_uniforms; ++i) {
+    const ShaderUniform* uniform = &prog->uniforms[i];
+    switch (uniform->type) {
+    case UniformTexture:
+      set_texture_uniform(prog->id, uniform->name.str, next_texture_unit,
+                          uniform->value.texture);
+      next_texture_unit++;
+      break;
+    case UniformMat4:
+      set_mat4_uniform(prog->id, uniform->name.str, &uniform->value.mat4);
+      break;
+    case UniformVec3:
+      set_vec3_uniform(prog->id, uniform->name.str, uniform->value.vec3);
+      break;
+    case UniformVec4:
+      set_vec4_uniform(prog->id, uniform->name.str, uniform->value.vec4);
+      break;
+    case UniformFloat:
+      set_float_uniform(prog->id, uniform->name.str, uniform->value.scalar);
+      break;
+    }
+  }
+}
+
+// Get the ShaderUniform object by name from the shader program if it already
+// exists, or allocate a new one otherwise.
+//
+// If there is no more space for a new uniform, this function logs an error and
+// returns 0.
+static ShaderUniform* get_or_allocate_uniform(ShaderProgram* prog,
+                                              const char* name) {
+  assert(prog);
+  assert(name);
+  // First search for the uniform in the list.
+  for (int i = 0; i < prog->num_uniforms; ++i) {
+    ShaderUniform* uniform = &prog->uniforms[i];
+    if (sstring_eq_cstr(uniform->name, name)) {
+      return uniform;
+    }
+  }
+  // Create the uniform if it does not exist.
+  if (prog->num_uniforms == GFX_MAX_UNIFORMS_PER_SHADER) {
+    LOGE("Exceeded the maximum number of uniforms per shader. Please increase "
+         "this value.");
+    return 0;
+  }
+  ShaderUniform* uniform = &prog->uniforms[prog->num_uniforms];
+  prog->num_uniforms++;
+  return uniform;
+}
+
+// The functions below save the value of a uniform in the shader program. If the
+// uniform does not even exist, then there is no need to store the value.
+
+void gfx_set_texture_uniform(ShaderProgram* prog, const char* name,
+                             const Texture* texture) {
+  assert(prog);
+  assert(name);
+  assert(texture);
+  const GLint location = glGetUniformLocation(prog->id, name);
+  if (location < 0) {
+    return;
+  }
+  ShaderUniform* uniform = get_or_allocate_uniform(prog, name);
+  if (!uniform) {
+    return;
+  }
+  uniform->name = sstring_make(name);
+  uniform->type = UniformTexture;
+  uniform->value.texture = texture;
+}
+
+void gfx_set_mat4_uniform(ShaderProgram* prog, const char* name,
+                          const mat4* mat) {
+  assert(prog);
+  assert(name);
+  assert(mat);
+  const GLint location = glGetUniformLocation(prog->id, name);
+  if (location < 0) {
+    return;
+  }
+  ShaderUniform* uniform = get_or_allocate_uniform(prog, name);
+  if (!uniform) {
+    return;
+  }
+  uniform->name = sstring_make(name);
+  uniform->type = UniformMat4;
+  uniform->value.mat4 = *mat;
+}
+
+void gfx_set_vec3_uniform(ShaderProgram* prog, const char* name, vec3 value) {
+  assert(prog);
+  assert(name);
+  const GLint location = glGetUniformLocation(prog->id, name);
+  if (location < 0) {
+    return;
+  }
+  ShaderUniform* uniform = get_or_allocate_uniform(prog, name);
+  if (!uniform) {
+    return;
+  }
+  uniform->name = sstring_make(name);
+  uniform->type = UniformVec3;
+  uniform->value.vec3 = value;
+}
+
+void gfx_set_vec4_uniform(ShaderProgram* prog, const char* name, vec4 value) {
+  assert(prog);
+  assert(name);
+  const GLint location = glGetUniformLocation(prog->id, name);
+  if (location < 0) {
+    return;
+  }
+  ShaderUniform* uniform = get_or_allocate_uniform(prog, name);
+  if (!uniform) {
+    return;
+  }
+  uniform->name = sstring_make(name);
+  uniform->type = UniformVec4;
+  uniform->value.vec4 = value;
+}
+
+void gfx_set_float_uniform(ShaderProgram* prog, const char* name, float value) {
+  assert(prog);
+  assert(name);
+  // No need to store the uniform on our side if it does not exist in the
+  // program.
+  const GLint location = glGetUniformLocation(prog->id, name);
+  if (location < 0) {
+    return;
+  }
+  ShaderUniform* uniform = get_or_allocate_uniform(prog, name);
+  if (!uniform) {
+    return;
+  }
+  uniform->name = sstring_make(name);
+  uniform->type = UniformFloat;
+  uniform->value.scalar = value;
+}
diff --git a/gfx/src/render/shader_program.h b/gfx/src/render/shader_program.h
new file mode 100644
index 0000000..c269190
--- /dev/null
+++ b/gfx/src/render/shader_program.h
@@ -0,0 +1,24 @@
+#pragma once
+
+#include <gfx/render_backend.h>
+#include <gfx/sizes.h>
+
+#include "gl_util.h"
+
+#include <math/fwd.h>
+
+#include <stdbool.h>
+
+typedef struct Texture Texture;
+
+typedef struct ShaderProgram {
+  GLuint id;
+  ShaderUniform uniforms[GFX_MAX_UNIFORMS_PER_SHADER];
+  int num_uniforms;
+} ShaderProgram;
+
+/// Create a new shader program.
+bool gfx_build_shader_program(ShaderProgram*, const ShaderProgramDesc*);
+
+/// Destroy the shader program.
+void gfx_del_shader_program(ShaderProgram*);
diff --git a/gfx/src/render/texture.c b/gfx/src/render/texture.c
new file mode 100644
index 0000000..691f3f8
--- /dev/null
+++ b/gfx/src/render/texture.c
@@ -0,0 +1,195 @@
+#include "texture.h"
+
+#include <gfx/error.h>
+
+#include <math/defs.h>
+
+#include <assert.h>
+#include <stdbool.h>
+
+bool gfx_init_texture(Texture* texture, const TextureDesc* desc) {
+  assert(texture);
+  assert(desc);
+
+  glGenTextures(1, &texture->id);
+  if (!texture->id) {
+    gfx_set_error("glGenTextures() failed");
+    return false;
+  }
+  texture->target = to_GL_dimension(desc->dimension);
+  glBindTexture(texture->target, texture->id);
+
+  // glTexStorageXD
+  const int levels =
+      desc->mipmaps
+          ? max(max(log2(desc->width), log2(desc->height)), log2(desc->depth)) +
+                1
+          : 1;
+  const GLenum internal_format = to_GL_internal_format(desc->format);
+  switch (texture->target) {
+  case GL_TEXTURE_2D:
+  case GL_TEXTURE_CUBE_MAP:
+    glTexStorage2D(texture->target, levels, internal_format, desc->width,
+                   desc->height);
+    break;
+  default:
+    assert(false && "Unhandled texture dimension");
+    gfx_del_texture(texture);
+    return false;
+  }
+
+  // glTexSubImageXD
+  const GLenum format = to_GL_format(desc->format);
+  const GLenum type = to_GL_type(desc->format);
+  switch (texture->target) {
+  case GL_TEXTURE_2D:
+    if (desc->pixels) {
+      glTexSubImage2D(GL_TEXTURE_2D, /*level=*/0, /*xoffset=*/0,
+                      /*yoffset=*/0, desc->width, desc->height, format, type,
+                      desc->pixels);
+    }
+    break;
+  case GL_TEXTURE_CUBE_MAP:
+    for (int i = 0; i < 6; ++i) {
+      const void* pixels = *(&desc->cubemap.pixels_pos_x + i);
+      if (pixels) {
+        glTexSubImage2D(
+            GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, /*level=*/0, /*xoffset=*/0,
+            /*yoffset=*/0, desc->width, desc->height, format, type, pixels);
+      }
+    }
+    break;
+  default:
+    assert(false && "Unhandled texture dimension");
+    gfx_del_texture(texture);
+    return false;
+  }
+
+  // Mipmaps.
+  if (desc->mipmaps) {
+    glGenerateMipmap(texture->target);
+  }
+
+  // Texture filtering.
+  const bool linear = desc->filtering == LinearFiltering;
+  GLenum min = desc->mipmaps ? (linear ? GL_LINEAR_MIPMAP_LINEAR
+                                       : GL_NEAREST_MIPMAP_NEAREST)
+                             : (linear ? GL_LINEAR : GL_NEAREST);
+  GLenum mag = linear ? GL_LINEAR : GL_NEAREST;
+  glTexParameteri(texture->target, GL_TEXTURE_MIN_FILTER, min);
+  glTexParameteri(texture->target, GL_TEXTURE_MAG_FILTER, mag);
+
+  // Texture wrapping.
+  GLenum wrap = GL_INVALID_ENUM;
+  switch (desc->wrap) {
+  case Repeat:
+    wrap = GL_REPEAT;
+    break;
+  case ClampToEdge:
+    wrap = GL_CLAMP_TO_EDGE;
+    break;
+  }
+  glTexParameteri(texture->target, GL_TEXTURE_WRAP_R, wrap);
+  glTexParameteri(texture->target, GL_TEXTURE_WRAP_S, wrap);
+  glTexParameteri(texture->target, GL_TEXTURE_WRAP_T, wrap);
+
+  glBindTexture(texture->target, 0);
+  return true;
+}
+
+void gfx_del_texture(Texture* texture) {
+  if (texture->id) {
+    glDeleteTextures(1, &texture->id);
+    texture->id = 0;
+  }
+}
+
+GLenum to_GL_dimension(TextureDimension dim) {
+  switch (dim) {
+  case Texture2D:
+    return GL_TEXTURE_2D;
+  case TextureCubeMap:
+    return GL_TEXTURE_CUBE_MAP;
+  default:
+    assert(false && "Unhandled TextureDimension");
+    return GL_INVALID_ENUM;
+  }
+}
+
+GLenum to_GL_internal_format(TextureFormat format) {
+  switch (format) {
+  case TextureDepth:
+    return GL_DEPTH_COMPONENT;
+  case TextureRG16:
+    return GL_RG16;
+  case TextureRG16F:
+    return GL_RG16F;
+  case TextureRGB8:
+    return GL_RGB8;
+  case TextureRGBA8:
+    return GL_RGBA8;
+  case TextureSRGB8:
+    return GL_SRGB8;
+  case TextureSRGBA8:
+    return GL_SRGB8_ALPHA8;
+  default:
+    assert(false && "Unhandled TextureFormat");
+    return GL_INVALID_ENUM;
+  }
+}
+
+GLenum to_GL_format(TextureFormat format) {
+  switch (format) {
+  case TextureDepth:
+    return GL_DEPTH_COMPONENT;
+  case TextureRG16:
+  case TextureRG16F:
+    return GL_RG;
+  case TextureRGB8:
+  case TextureSRGB8:
+    return GL_RGB;
+  case TextureRGBA8:
+  case TextureSRGBA8:
+    return GL_RGBA;
+  default:
+    assert(false && "Unhandled TextureFormat");
+    return GL_INVALID_ENUM;
+  }
+}
+
+GLenum to_GL_type(TextureFormat format) {
+  switch (format) {
+  case TextureDepth:
+  case TextureRG16F:
+    return GL_FLOAT;
+  case TextureRG16:
+  case TextureRGB8:
+  case TextureRGBA8:
+  case TextureSRGB8:
+  case TextureSRGBA8:
+    return GL_UNSIGNED_BYTE;
+  default:
+    assert(false && "Unhandled TextureFormat");
+    return GL_INVALID_ENUM;
+  }
+}
+
+GLenum to_GL_cubemap_face(CubemapFace face) {
+  switch (face) {
+  case CubemapFacePosX:
+    return GL_TEXTURE_CUBE_MAP_POSITIVE_X;
+  case CubemapFaceNegX:
+    return GL_TEXTURE_CUBE_MAP_NEGATIVE_X;
+  case CubemapFacePosY:
+    return GL_TEXTURE_CUBE_MAP_POSITIVE_Y;
+  case CubemapFaceNegY:
+    return GL_TEXTURE_CUBE_MAP_NEGATIVE_Y;
+  case CubemapFacePosZ:
+    return GL_TEXTURE_CUBE_MAP_POSITIVE_Z;
+  case CubemapFaceNegZ:
+    return GL_TEXTURE_CUBE_MAP_NEGATIVE_Z;
+  default:
+    assert(false && "Unhandled CubemapFace");
+    return GL_INVALID_ENUM;
+  }
+}
diff --git a/gfx/src/render/texture.h b/gfx/src/render/texture.h
new file mode 100644
index 0000000..b4e4bed
--- /dev/null
+++ b/gfx/src/render/texture.h
@@ -0,0 +1,31 @@
+#pragma once
+
+#include <gfx/render_backend.h>
+
+#include "gl_util.h"
+
+typedef struct Texture {
+  GLuint id;
+  GLenum target;
+} Texture;
+
+/// Create a new texture.
+bool gfx_init_texture(Texture*, const TextureDesc*);
+
+/// Destroy the texture.
+void gfx_del_texture(Texture*);
+
+/// Converts a TextureDimension into the OpenGL enum equivalent.
+GLenum to_GL_dimension(TextureDimension dim);
+
+/// Converts a texture format into an OpenGL internal format.
+GLenum to_GL_internal_format(TextureFormat format);
+
+/// Converts a texture format into an OpenGL format.
+GLenum to_GL_format(TextureFormat format);
+
+/// Converts a texture format into an OpenGL type.
+GLenum to_GL_type(TextureFormat format);
+
+/// Converts a cubemap face into the OpenGL enum equivalent.
+GLenum to_GL_cubemap_face(CubemapFace face);
diff --git a/gfx/src/renderer/renderer.c b/gfx/src/renderer/renderer.c
new file mode 100644
index 0000000..ed781c9
--- /dev/null
+++ b/gfx/src/renderer/renderer.c
@@ -0,0 +1,238 @@
+#include "renderer_impl.h"
+
+#include "scene/camera_impl.h"
+#include "scene/light_impl.h"
+#include "scene/material_impl.h"
+#include "scene/mesh_impl.h"
+#include "scene/node_impl.h"
+#include "scene/object_impl.h"
+#include "scene/scene_impl.h"
+#include "scene/scene_memory.h"
+
+#include <gfx/render_backend.h>
+#include <gfx/util/ibl.h>
+
+#include <log/log.h>
+#include <math/mat4.h>
+#include <math/spatial3.h>
+
+#include <assert.h>
+
+static const int IRRADIANCE_MAP_WIDTH = 1024;
+static const int IRRADIANCE_MAP_HEIGHT = 1024;
+static const int PREFILTERED_ENVIRONMENT_MAP_WIDTH = 128;
+static const int PREFILTERED_ENVIRONMENT_MAP_HEIGHT = 128;
+static const int BRDF_INTEGRATION_MAP_WIDTH = 512;
+static const int BRDF_INTEGRATION_MAP_HEIGHT = 512;
+
+bool renderer_make(Renderer* renderer, RenderBackend* render_backend) {
+  assert(renderer);
+  assert(render_backend);
+
+  if (!(renderer->ibl = gfx_make_ibl(render_backend))) {
+    renderer_destroy(renderer, render_backend);
+    return false;
+  }
+
+  if (!(renderer->brdf_integration_map = gfx_make_brdf_integration_map(
+            renderer->ibl, render_backend, BRDF_INTEGRATION_MAP_WIDTH,
+            BRDF_INTEGRATION_MAP_HEIGHT))) {
+    renderer_destroy(renderer, render_backend);
+    return false;
+  }
+
+  return true;
+}
+
+void renderer_destroy(Renderer* renderer, RenderBackend* render_backend) {
+  if (!renderer) {
+    return;
+  }
+  assert(render_backend);
+  if (renderer->ibl) {
+    gfx_destroy_ibl(render_backend, &renderer->ibl);
+  }
+}
+
+// static void log_matrix(const mat4* m) {
+//   for (int row = 0; row < 4; ++row) {
+//     LOGI("[ %5.2f, %5.2f, %5.2f, %5.2f ]", m->val[0][row], m->val[1][row],
+//          m->val[2][row], m->val[3][row]);
+//   }
+// }
+
+/// Computes irradiance and prefiltered environment maps for the light if they
+/// have not been already computed.
+static bool setup_environment_light(Renderer* renderer,
+                                    RenderBackend* render_backend,
+                                    EnvironmentLight* light) {
+  assert(renderer);
+  assert(light);
+  assert(renderer->ibl);
+
+  if (light->irradiance_map) {
+    assert(light->prefiltered_environment_map);
+    return true;
+  }
+
+  Texture* irradiance_map = 0;
+  Texture* prefiltered_environment_map = 0;
+
+  if (!(irradiance_map = gfx_make_irradiance_map(
+            renderer->ibl, render_backend, light->environment_map,
+            IRRADIANCE_MAP_WIDTH, IRRADIANCE_MAP_HEIGHT))) {
+    goto cleanup;
+  }
+
+  int max_mip_level = 0;
+  if (!(prefiltered_environment_map = gfx_make_prefiltered_environment_map(
+            renderer->ibl, render_backend, light->environment_map,
+            PREFILTERED_ENVIRONMENT_MAP_WIDTH,
+            PREFILTERED_ENVIRONMENT_MAP_HEIGHT, &max_mip_level))) {
+    goto cleanup;
+  }
+
+  light->irradiance_map = irradiance_map;
+  light->prefiltered_environment_map = prefiltered_environment_map;
+  light->max_reflection_lod = max_mip_level;
+
+  return true;
+
+cleanup:
+  if (irradiance_map) {
+    gfx_destroy_texture(render_backend, &irradiance_map);
+  }
+  if (prefiltered_environment_map) {
+    gfx_destroy_texture(render_backend, &prefiltered_environment_map);
+  }
+  return false;
+}
+
+typedef struct RenderState {
+  RenderBackend* render_backend;
+  Renderer* renderer;
+  const Scene* scene;
+  const Camera* camera;
+  const mat4* view_matrix;
+  const mat4* projection;
+  Light* environment_light;
+  const float fovy;
+  const float aspect;
+} RenderState;
+
+static void draw_recursively(RenderState* state, mat4 parent_transform,
+                             node_idx node_index) {
+  assert(state);
+  const SceneNode* node = mem_get_node(node_index);
+  const mat4 node_transform = mat4_mul(parent_transform, node->transform);
+
+  // Activate light.
+  if (node->type == LightNode) {
+    Light* light = mem_get_light(node->light);
+    assert(light);
+
+    if (light->type == EnvironmentLightType) {
+      bool result = setup_environment_light(
+          state->renderer, state->render_backend, &light->environment);
+      // TODO: Handle the result in a better way.
+      assert(result);
+      state->environment_light = light;
+    }
+  }
+  // Render object.
+  else if (node->type == ObjectNode) {
+    const SceneObject* object = mem_get_object(node->object);
+    assert(object);
+
+    const mat4 model_matrix = mat4_mul(node_transform, object->transform);
+    const mat4 modelview = mat4_mul(*state->view_matrix, model_matrix);
+    const mat4 mvp = mat4_mul(*state->projection, modelview);
+
+    for (mesh_link_idx mesh_link_index = object->mesh_link;
+         mesh_link_index.val;) {
+      const MeshLink* mesh_link = mem_get_mesh_link(mesh_link_index);
+      mesh_link_index = mesh_link->next;
+
+      const Mesh* mesh = mem_get_mesh(mesh_link->mesh);
+      if (!mesh) {
+        continue;
+      }
+      assert(mesh->geometry);
+      assert(mesh->material);
+      material_activate(mesh->material);
+      // Apply common shader uniforms not captured by materials.
+      // TODO: Avoid computing matrices like Modelview or MVP if the shader does
+      // not use them.
+      ShaderProgram* shader = mesh->material->shader;
+      gfx_set_mat4_uniform(shader, "ModelMatrix", &model_matrix);
+      gfx_set_mat4_uniform(shader, "Modelview", &modelview);
+      gfx_set_mat4_uniform(shader, "Projection", state->projection);
+      gfx_set_mat4_uniform(shader, "MVP", &mvp);
+      gfx_set_float_uniform(shader, "Fovy", state->fovy);
+      gfx_set_float_uniform(shader, "Aspect", state->aspect);
+      gfx_set_vec3_uniform(shader, "CameraPosition", state->camera->spatial.p);
+      // Apply lights.
+      if (state->environment_light) {
+        const EnvironmentLight* light = &state->environment_light->environment;
+        assert(light->irradiance_map);
+        assert(light->prefiltered_environment_map);
+        assert(state->renderer->brdf_integration_map);
+        gfx_set_texture_uniform(shader, "BRDFIntegrationMap",
+                                state->renderer->brdf_integration_map);
+        gfx_set_texture_uniform(shader, "Sky", light->environment_map);
+        gfx_set_texture_uniform(shader, "IrradianceMap", light->irradiance_map);
+        gfx_set_texture_uniform(shader, "PrefilteredEnvironmentMap",
+                                light->prefiltered_environment_map);
+        gfx_set_float_uniform(shader, "MaxReflectionLOD",
+                              light->max_reflection_lod);
+      }
+      // TODO: Remove this altogether.
+      // This is not needed because material_activate() already activates the
+      // shader.
+      // gfx_activate_shader_program(shader);
+      gfx_apply_uniforms(shader);
+      gfx_render_geometry(mesh->geometry);
+    }
+  }
+
+  // Render children recursively.
+  for (node_idx child_index = node->child; child_index.val;) {
+    draw_recursively(state, node_transform, child_index);
+
+    const SceneNode* child = mem_get_node(child_index);
+    child_index = child->next;
+  }
+}
+
+void gfx_render_scene(Renderer* renderer, RenderBackend* render_backend,
+                      const Scene* scene, const SceneCamera* camera) {
+  assert(renderer);
+  assert(render_backend);
+
+  if (!scene) {
+    return;
+  }
+
+  const mat4 projection = camera ? camera->camera.projection : mat4_id();
+  const mat4 view_matrix =
+      camera ? spatial3_inverse_transform(&camera->camera.spatial) : mat4_id();
+
+  int width, height;
+  gfx_get_viewport(render_backend, &width, &height);
+  const float aspect = (float)width / (float)height;
+
+  RenderState state = {.render_backend = render_backend,
+                       .renderer = renderer,
+                       .scene = scene,
+                       .camera = &camera->camera,
+                       .view_matrix = &view_matrix,
+                       .projection = &projection,
+                       .environment_light = 0,
+                       // Assuming a perspective matrix.
+                       .fovy = atan(1.0 / (mat4_at(projection, 1, 1))) * 2,
+                       .aspect = aspect};
+
+  gfx_start_frame(render_backend);
+  draw_recursively(&state, mat4_id(), scene->root);
+  gfx_end_frame(render_backend);
+}
diff --git a/gfx/src/renderer/renderer_impl.h b/gfx/src/renderer/renderer_impl.h
new file mode 100644
index 0000000..ce8ebe7
--- /dev/null
+++ b/gfx/src/renderer/renderer_impl.h
@@ -0,0 +1,18 @@
+#pragma once
+
+#include <gfx/renderer.h>
+
+#include <gfx/util/ibl.h>
+
+#include <stdbool.h>
+
+typedef struct Renderer {
+  IBL* ibl;
+  Texture* brdf_integration_map;
+} Renderer;
+
+/// Create a new renderer.
+bool renderer_make(Renderer*, RenderBackend*);
+
+/// Destroy the renderer.
+void renderer_destroy(Renderer*, RenderBackend*);
diff --git a/gfx/src/scene/camera.c b/gfx/src/scene/camera.c
new file mode 100644
index 0000000..df161c2
--- /dev/null
+++ b/gfx/src/scene/camera.c
@@ -0,0 +1,42 @@
+#include "camera_impl.h"
+
+#include "node_impl.h"
+#include "scene_memory.h"
+
+#include <assert.h>
+
+static void scene_camera_make(SceneCamera* camera) {
+  assert(camera);
+  camera->camera =
+      camera_perspective(/*fovy=*/90.0 * TO_RAD, /*aspect=*/16.0 / 9.0,
+                         /*near=*/0.1, /*far=*/1000);
+}
+
+SceneCamera* gfx_make_camera() {
+  SceneCamera* camera = mem_alloc_camera();
+  if (!camera) {
+    return 0;
+  }
+  scene_camera_make(camera);
+  return camera;
+}
+
+void gfx_destroy_camera(SceneCamera** camera) {
+  assert(camera);
+  assert(*camera);
+  if ((*camera)->parent.val) {
+    gfx_del_node((*camera)->parent);
+  }
+  mem_free_camera(camera);
+}
+
+void gfx_set_camera_camera(SceneCamera* scene_camera, Camera* camera) {
+  assert(scene_camera);
+  assert(camera);
+  scene_camera->camera = *camera;
+}
+
+Camera* gfx_get_camera_camera(SceneCamera* camera) {
+  assert(camera);
+  return &camera->camera;
+}
diff --git a/gfx/src/scene/camera_impl.h b/gfx/src/scene/camera_impl.h
new file mode 100644
index 0000000..20c3890
--- /dev/null
+++ b/gfx/src/scene/camera_impl.h
@@ -0,0 +1,12 @@
+#pragma once
+
+#include <gfx/scene/camera.h>
+
+#include "types.h"
+
+#include <math/camera.h>
+
+typedef struct SceneCamera {
+  Camera camera;
+  node_idx parent; // Parent SceneNode.
+} SceneCamera;
diff --git a/gfx/src/scene/light.c b/gfx/src/scene/light.c
new file mode 100644
index 0000000..2ca1a01
--- /dev/null
+++ b/gfx/src/scene/light.c
@@ -0,0 +1,45 @@
+#include "light_impl.h"
+
+#include "node_impl.h"
+#include "scene_memory.h"
+
+#include <gfx/error.h>
+
+static void make_environment_light(Light* light,
+                                   const EnvironmentLightDesc* desc) {
+  assert(light);
+  assert(desc);
+
+  light->type = EnvironmentLightType;
+  light->environment.environment_map = desc->environment_map;
+}
+
+Light* gfx_make_light(const LightDesc* desc) {
+  assert(desc);
+
+  Light* light = mem_alloc_light();
+  if (!light) {
+    return 0;
+  }
+
+  switch (desc->type) {
+  case EnvironmentLightType:
+    make_environment_light(light, &desc->light.environment);
+    break;
+  default:
+    gfx_set_error("Unhandled light type");
+    gfx_destroy_light(&light);
+    return 0;
+  }
+
+  return light;
+}
+
+void gfx_destroy_light(Light** light) {
+  assert(light);
+  assert(*light);
+  if ((*light)->parent.val) {
+    gfx_del_node((*light)->parent);
+  }
+  mem_free_light(light);
+}
diff --git a/gfx/src/scene/light_impl.h b/gfx/src/scene/light_impl.h
new file mode 100644
index 0000000..1aa0bb4
--- /dev/null
+++ b/gfx/src/scene/light_impl.h
@@ -0,0 +1,25 @@
+#pragma once
+
+#include <gfx/scene/light.h>
+
+#include "types.h"
+
+typedef struct Texture Texture;
+
+/// An environment light.
+typedef struct EnvironmentLight {
+  const Texture* environment_map;
+  const Texture* irradiance_map;              // Renderer implementation.
+  const Texture* prefiltered_environment_map; // Renderer implementation.
+  int max_reflection_lod; // Mandatory when prefiltered_environment_map is
+                          // given.
+} EnvironmentLight;
+
+/// A scene light.
+typedef struct Light {
+  LightType type;
+  union {
+    EnvironmentLight environment;
+  };
+  node_idx parent; // Parent SceneNode.
+} Light;
diff --git a/gfx/src/scene/material.c b/gfx/src/scene/material.c
new file mode 100644
index 0000000..d44746a
--- /dev/null
+++ b/gfx/src/scene/material.c
@@ -0,0 +1,57 @@
+#include "material_impl.h"
+
+#include "scene_memory.h"
+
+#include <gfx/render_backend.h>
+
+static void material_make(Material* material, const MaterialDesc* desc) {
+  assert(material);
+  assert(desc);
+  assert(desc->num_uniforms < GFX_MAX_UNIFORMS_PER_MATERIAL);
+  material->shader = desc->shader;
+  material->num_uniforms = desc->num_uniforms;
+  for (int i = 0; i < desc->num_uniforms; ++i) {
+    material->uniforms[i] = desc->uniforms[i];
+  }
+}
+
+Material* gfx_make_material(const MaterialDesc* desc) {
+  assert(desc);
+  Material* material = mem_alloc_material();
+  if (!material) {
+    return 0;
+  }
+  material_make(material, desc);
+  return material;
+}
+
+void gfx_destroy_material(Material** material) { mem_free_material(material); }
+
+static void set_uniform(ShaderProgram* prog, const ShaderUniform* uniform) {
+  switch (uniform->type) {
+  case UniformTexture:
+    gfx_set_texture_uniform(prog, uniform->name.str, uniform->value.texture);
+    break;
+  case UniformMat4:
+    gfx_set_mat4_uniform(prog, uniform->name.str, &uniform->value.mat4);
+    break;
+  case UniformVec3:
+    gfx_set_vec3_uniform(prog, uniform->name.str, uniform->value.vec3);
+    break;
+  case UniformVec4:
+    gfx_set_vec4_uniform(prog, uniform->name.str, uniform->value.vec4);
+    break;
+  case UniformFloat:
+    gfx_set_float_uniform(prog, uniform->name.str, uniform->value.scalar);
+    break;
+  }
+}
+
+void material_activate(const Material* material) {
+  assert(material);
+  gfx_activate_shader_program(material->shader);
+  for (int i = 0; i < material->num_uniforms; ++i) {
+    const ShaderUniform* uniform = &material->uniforms[i];
+    set_uniform(material->shader, uniform);
+  }
+}
diff --git a/gfx/src/scene/material_impl.h b/gfx/src/scene/material_impl.h
new file mode 100644
index 0000000..c680ccf
--- /dev/null
+++ b/gfx/src/scene/material_impl.h
@@ -0,0 +1,17 @@
+#pragma once
+
+#include <gfx/scene/material.h>
+
+typedef struct ShaderProgram ShaderProgram;
+
+typedef struct Material {
+  ShaderProgram* shader;
+  ShaderUniform uniforms[GFX_MAX_UNIFORMS_PER_MATERIAL];
+  int num_uniforms;
+} Material;
+
+/// Activate the material.
+///
+/// This activates the material's shader and configures the shader uniforms that
+/// are specific to the material.
+void material_activate(const Material* material);
diff --git a/gfx/src/scene/mesh.c b/gfx/src/scene/mesh.c
new file mode 100644
index 0000000..722eae7
--- /dev/null
+++ b/gfx/src/scene/mesh.c
@@ -0,0 +1,25 @@
+#include "mesh_impl.h"
+
+#include "scene_memory.h"
+
+#include <assert.h>
+
+static void mesh_make(Mesh* mesh, const MeshDesc* desc) {
+  assert(mesh);
+  assert(desc);
+  assert(desc->geometry);
+  assert(desc->material);
+  mesh->geometry = desc->geometry;
+  mesh->material = desc->material;
+}
+
+Mesh* gfx_make_mesh(const MeshDesc* desc) {
+  Mesh* mesh = mem_alloc_mesh();
+  if (!mesh) {
+    return 0;
+  }
+  mesh_make(mesh, desc);
+  return mesh;
+}
+
+void gfx_destroy_mesh(Mesh** mesh) { mem_free_mesh(mesh); }
diff --git a/gfx/src/scene/mesh_impl.h b/gfx/src/scene/mesh_impl.h
new file mode 100644
index 0000000..858b147
--- /dev/null
+++ b/gfx/src/scene/mesh_impl.h
@@ -0,0 +1,11 @@
+#pragma once
+
+#include <gfx/scene/mesh.h>
+
+typedef struct Mesh {
+  const Geometry* geometry;
+  const Material* material;
+} Mesh;
+
+// TODO: a mesh_render() that takes a transform, applies the material and the
+// transform, and then renders the geometry.
diff --git a/gfx/src/scene/node.c b/gfx/src/scene/node.c
new file mode 100644
index 0000000..7d7f69f
--- /dev/null
+++ b/gfx/src/scene/node.c
@@ -0,0 +1,115 @@
+#include "node_impl.h"
+
+#include "camera_impl.h"
+#include "light_impl.h"
+#include "object_impl.h"
+#include "scene_graph.h"
+#include "scene_memory.h"
+
+#include <assert.h>
+
+static void scene_node_make(SceneNode* node) {
+  assert(node);
+  node->type = LogicalNode;
+  node->transform = mat4_id();
+}
+
+SceneNode* gfx_make_node() {
+  SceneNode* node = mem_alloc_node();
+  if (!node) {
+    return 0;
+  }
+  scene_node_make(node);
+  return node;
+}
+
+SceneNode* gfx_make_camera_node(SceneCamera* camera) {
+  assert(camera);
+  SceneNode* node = gfx_make_node();
+  if (!node) {
+    return 0;
+  }
+  node->type = CameraNode;
+  node->camera = mem_get_camera_index(camera);
+  camera->parent = mem_get_node_index(node);
+  return node;
+}
+
+SceneNode* gfx_make_light_node(Light* light) {
+  assert(light);
+  SceneNode* node = gfx_make_node();
+  if (!node) {
+    return 0;
+  }
+  node->type = LightNode;
+  node->light = mem_get_light_index(light);
+  light->parent = mem_get_node_index(node);
+  return node;
+}
+
+SceneNode* gfx_make_object_node(SceneObject* object) {
+  assert(object);
+  SceneNode* node = gfx_make_node();
+  if (!node) {
+    return 0;
+  }
+  node->type = ObjectNode;
+  node->object = mem_get_object_index(object);
+  object->parent = mem_get_node_index(node);
+  return node;
+}
+
+void gfx_destroy_node(SceneNode** node) {
+  assert(node);
+  assert(*node);
+
+  // Destroy the node's resources.
+  // Camera.
+  if ((*node)->type == CameraNode) {
+    SceneCamera* camera = mem_get_camera((*node)->camera);
+    camera->parent.val = 0; // Avoid recursive call into gfx_destroy_node().
+    gfx_destroy_camera(&camera);
+  }
+  // TODO: free light.
+  // Object.
+  if ((*node)->type == ObjectNode) {
+    SceneObject* object = mem_get_object((*node)->object);
+    object->parent.val = 0; // Avoid recursive call into gfx_destroy_node().
+    gfx_destroy_object(&object);
+  }
+
+  TREE_REMOVE(*node);
+  mem_free_node(node);
+}
+
+void gfx_del_node(node_idx index) {
+  assert(index.val);
+  SceneNode* node = mem_get_node(index);
+  assert(node);
+  TREE_REMOVE(node);
+  mem_free_node(&node);
+}
+
+void gfx_set_node_parent(SceneNode* child, SceneNode* parent) {
+  assert(child);
+  assert(parent);
+  SET_PARENT(child, parent);
+}
+
+void gfx_set_node_transform(SceneNode* node, const mat4* transform) {
+  assert(node);
+  assert(transform);
+  node->transform = *transform;
+}
+
+void gfx_set_node_position(SceneNode* node, const vec3* position) {
+  assert(node);
+  assert(position);
+  mat4_set_v3(&node->transform, *position);
+}
+
+void gfx_set_node_rotation(SceneNode* node, const mat4* rotation) {
+  assert(node);
+  assert(rotation);
+  mat4_set_3x3(&node->transform, *rotation);
+}
diff --git a/gfx/src/scene/node_impl.h b/gfx/src/scene/node_impl.h
new file mode 100644
index 0000000..ce3b769
--- /dev/null
+++ b/gfx/src/scene/node_impl.h
@@ -0,0 +1,38 @@
+#pragma once
+
+#include <gfx/scene/node.h>
+
+#include "types.h"
+
+#include <math/mat4.h>
+
+/// Scene node type.
+typedef enum NodeType {
+  CameraNode,
+  LightNode,
+  LogicalNode,
+  ObjectNode
+} NodeType;
+
+/// Scene node.
+///
+/// The SceneNode owns its cameras, objects, lights and child nodes. These
+/// together form a strict tree hierarchy and not a more general DAG.
+typedef struct SceneNode {
+  NodeType type;
+  union {
+    camera_idx camera;
+    light_idx light;
+    object_idx object;
+  };
+  mat4 transform;  // Transformation for this node and its children.
+  node_idx parent; // Parent SceneNode.
+  node_idx child;  // First child SceneNode.
+  node_idx next;   // Next sibling SceneNode.
+  node_idx prev;   // Previous sibling SceneNode.
+} SceneNode;
+
+/// Destroy a node given its index.
+///
+/// The node is conveniently removed from the scene graph.
+void gfx_del_node(node_idx);
diff --git a/gfx/src/scene/object.c b/gfx/src/scene/object.c
new file mode 100644
index 0000000..7f23e92
--- /dev/null
+++ b/gfx/src/scene/object.c
@@ -0,0 +1,71 @@
+#include "object_impl.h"
+
+#include "node_impl.h"
+#include "scene_memory.h"
+
+#include <assert.h>
+
+static void scene_object_make(SceneObject* object) {
+  assert(object);
+  object->transform = mat4_id();
+}
+
+SceneObject* gfx_make_object() {
+  SceneObject* object = mem_alloc_object();
+  if (!object) {
+    return 0;
+  }
+  scene_object_make(object);
+  return object;
+}
+
+void gfx_destroy_object(SceneObject** object) {
+  assert(object);
+  assert(*object);
+  if ((*object)->parent.val) {
+    gfx_del_node((*object)->parent);
+  }
+  mem_free_object(object);
+}
+
+void gfx_set_object_transform(SceneObject* object, const mat4* transform) {
+  assert(object);
+  assert(transform);
+  object->transform = *transform;
+}
+
+void gfx_add_object_mesh(SceneObject* object, Mesh* mesh) {
+  assert(object);
+  assert(mesh);
+
+  MeshLink* link = mem_alloc_mesh_link();
+  assert(link);
+  link->mesh = mem_get_mesh_index(mesh);
+  link->next = object->mesh_link;
+  object->mesh_link = mem_get_mesh_link_index(link);
+}
+
+void gfx_remove_object_mesh(SceneObject* object, Mesh* mesh) {
+  assert(object);
+  assert(mesh);
+
+  MeshLink* prev = 0;
+  const mesh_idx mesh_index = mem_get_mesh_index(mesh);
+
+  // Find the MeshLink in the object that contains the given mesh.
+  for (mesh_link_idx mesh_link_index = object->mesh_link;
+       mesh_link_index.val;) {
+    MeshLink* mesh_link = mem_get_mesh_link(mesh_link_index);
+    if (mesh_link->mesh.val == mesh_index.val) {
+      if (prev) {
+        prev->next = mesh_link->next;
+      } else {
+        object->mesh_link = mesh_link->next;
+      }
+      mem_free_mesh_link(&mesh_link);
+      break;
+    }
+    prev = mesh_link;
+    mesh_link_index = mesh_link->next;
+  }
+}
diff --git a/gfx/src/scene/object_impl.h b/gfx/src/scene/object_impl.h
new file mode 100644
index 0000000..bd3fdbc
--- /dev/null
+++ b/gfx/src/scene/object_impl.h
@@ -0,0 +1,25 @@
+#pragma once
+
+#include <gfx/scene/object.h>
+
+#include "types.h"
+
+#include <math/mat4.h>
+
+typedef struct MeshLink {
+  mesh_idx mesh;
+  mesh_link_idx next; // Next MeshLink in the list.
+} MeshLink;
+
+/// Scene object.
+///
+/// A SceneObject does not own its Meshes, and they are instead shared for
+/// re-use. The SceneObject consequently embeds a list of MeshLinks as opposed
+/// to a list of Meshes. The MeshLinks define a list of Meshes, which can be
+/// different for each SceneObject. Each SceneObject may then have a unique list
+/// of Meshes, and the Meshes are re-used.
+typedef struct SceneObject {
+  mat4 transform;
+  mesh_link_idx mesh_link; // First MeshLink in the list.
+  node_idx parent;         // Parent SceneNode.
+} SceneObject;
diff --git a/gfx/src/scene/scene.c b/gfx/src/scene/scene.c
new file mode 100644
index 0000000..9e974de
--- /dev/null
+++ b/gfx/src/scene/scene.c
@@ -0,0 +1,43 @@
+#include "scene_impl.h"
+
+#include "camera_impl.h"
+#include "node_impl.h"
+#include "object_impl.h"
+#include "scene_graph.h"
+#include "scene_memory.h"
+
+static void scene_destroy_rec(node_idx node_index) {
+  assert(node_index.val);
+
+  SceneNode* node = mem_get_node(node_index);
+  assert(node);
+
+  // First child.
+  if (node->child.val) {
+    scene_destroy_rec(node->child);
+  }
+
+  // Right sibling.
+  if (node->next.val) {
+    scene_destroy_rec(node->next);
+  }
+
+  gfx_destroy_node(&node);
+}
+
+void scene_make(Scene* scene) {
+  assert(scene);
+  SceneNode* root = gfx_make_node();
+  assert(root);
+  scene->root = mem_get_node_index(root);
+}
+
+void scene_destroy(Scene* scene) {
+  assert(scene);
+  scene_destroy_rec(scene->root);
+}
+
+SceneNode* gfx_get_scene_root(Scene* scene) {
+  assert(scene);
+  return mem_get_node(scene->root);
+}
diff --git a/gfx/src/scene/scene_graph.h b/gfx/src/scene/scene_graph.h
new file mode 100644
index 0000000..b9b3a14
--- /dev/null
+++ b/gfx/src/scene/scene_graph.h
@@ -0,0 +1,67 @@
+/// Functions for list manipulation.
+#pragma once
+
+#include "scene_memory.h"
+
+// Note that SceneMemory guarantees that index 0 can be regarded as an invalid
+// index.
+
+#define MEM_GET(INDEX)                                                         \
+  _Generic((INDEX), camera_idx                                                 \
+           : mem_get_camera, material_idx                                      \
+           : mem_get_material, mesh_idx                                        \
+           : mem_get_mesh, mesh_link_idx                                       \
+           : mem_get_mesh_link, node_idx                                       \
+           : mem_get_node, object_idx                                          \
+           : mem_get_object, scene_idx                                         \
+           : mem_get_scene)(INDEX)
+
+#define MEM_GET_INDEX(ITEM)                                                    \
+  _Generic((ITEM), SceneCamera *                                               \
+           : mem_get_camera_index, Material *                                  \
+           : mem_get_material_index, Mesh *                                    \
+           : mem_get_mesh_index, MeshLink *                                    \
+           : mem_get_mesh_link_index, SceneNode *                              \
+           : mem_get_node_index, SceneObject *                                 \
+           : mem_get_object_index, Scene *                                     \
+           : mem_get_scene_index)(ITEM)
+
+#define LIST_PREPEND(HEAD_INDEX, ITEM)                                         \
+  ITEM->next = HEAD_INDEX;                                                     \
+  if (HEAD_INDEX.val) {                                                        \
+    typeof(ITEM) old_head = MEM_GET(HEAD_INDEX);                               \
+    old_head->prev = MEM_GET_INDEX(ITEM);                                      \
+  }                                                                            \
+  HEAD_INDEX = MEM_GET_INDEX(ITEM);
+
+#define LIST_REMOVE(ITEM)                                                      \
+  if ((ITEM)->prev.val) {                                                      \
+    typeof(ITEM) prev_sibling = MEM_GET((ITEM)->prev);                         \
+    prev_sibling->next = (ITEM)->next;                                         \
+  }                                                                            \
+  if ((ITEM)->next.val) {                                                      \
+    typeof(ITEM) next_sibling = MEM_GET((ITEM)->next);                         \
+    next_sibling->prev = (ITEM)->prev;                                         \
+  }
+
+#define SET_PARENT(CHILD, PARENT)                                              \
+  assert(CHILD);                                                               \
+  if (CHILD->parent.val) {                                                     \
+    LIST_REMOVE(CHILD);                                                        \
+  }                                                                            \
+  if (parent) {                                                                \
+    LIST_PREPEND(PARENT->CHILD, CHILD);                                        \
+  }
+
+#define TREE_REMOVE(ITEM)                                                      \
+  if ((ITEM)->prev.val) {                                                      \
+    typeof(ITEM) prev_sibling = MEM_GET((ITEM)->prev);                         \
+    prev_sibling->next = (ITEM)->next;                                         \
+  }                                                                            \
+  if ((ITEM)->next.val) {                                                      \
+    typeof(ITEM) next_sibling = MEM_GET((ITEM)->next);                         \
+    next_sibling->prev = (ITEM)->prev;                                         \
+  }                                                                            \
+  if ((ITEM)->parent.val) {                                                    \
+    MEM_GET((ITEM)->parent)->child.val = 0;                                    \
+  }
diff --git a/gfx/src/scene/scene_impl.h b/gfx/src/scene/scene_impl.h
new file mode 100644
index 0000000..e0c25bf
--- /dev/null
+++ b/gfx/src/scene/scene_impl.h
@@ -0,0 +1,17 @@
+#pragma once
+
+#include <gfx/scene/scene.h>
+
+#include "types.h"
+
+typedef struct Scene {
+  node_idx root;
+  scene_idx next;
+  scene_idx prev;
+} Scene;
+
+/// Create a new scene.
+void scene_make(Scene*);
+
+/// Destroy the scene.
+void scene_destroy(Scene*);
diff --git a/gfx/src/scene/scene_memory.c b/gfx/src/scene/scene_memory.c
new file mode 100644
index 0000000..cd4a79c
--- /dev/null
+++ b/gfx/src/scene/scene_memory.c
@@ -0,0 +1,148 @@
+#include "scene_memory.h"
+
+#include <gfx/sizes.h>
+
+#include "camera_impl.h"
+#include "light_impl.h"
+#include "material_impl.h"
+#include "mesh_impl.h"
+#include "node_impl.h"
+#include "object_impl.h"
+#include "scene_impl.h"
+#include "types.h"
+
+#include <mempool.h>
+
+DEF_MEMPOOL(camera_pool, SceneCamera, GFX_MAX_NUM_CAMERAS)
+DEF_MEMPOOL(light_pool, Light, GFX_MAX_NUM_LIGHTS)
+DEF_MEMPOOL(material_pool, Material, GFX_MAX_NUM_MATERIALS)
+DEF_MEMPOOL(mesh_pool, Mesh, GFX_MAX_NUM_MESHES)
+DEF_MEMPOOL(mesh_link_pool, MeshLink, GFX_MAX_NUM_MESH_LINKS)
+DEF_MEMPOOL(node_pool, SceneNode, GFX_MAX_NUM_NODES)
+DEF_MEMPOOL(object_pool, SceneObject, GFX_MAX_NUM_OBJECTS)
+DEF_MEMPOOL(scene_pool, Scene, GFX_MAX_NUM_SCENES)
+
+/// Scene memory.
+///
+/// Holds memory pools for every type of scene object.
+typedef struct SceneMemory {
+  camera_pool cameras;
+  light_pool lights;
+  material_pool materials;
+  mesh_pool meshes;
+  mesh_link_pool mesh_links;
+  node_pool nodes;
+  object_pool objects;
+  scene_pool scenes;
+} SceneMemory;
+
+static SceneMemory mem;
+
+#define ALLOC_DUMMY(POOL)                                                      \
+  assert(mempool_get_block_index(POOL, mempool_alloc(POOL)) == 0)
+
+void scene_mem_init() {
+  mempool_make(&mem.cameras);
+  mempool_make(&mem.lights);
+  mempool_make(&mem.materials);
+  mempool_make(&mem.meshes);
+  mempool_make(&mem.mesh_links);
+  mempool_make(&mem.nodes);
+  mempool_make(&mem.objects);
+  mempool_make(&mem.scenes);
+
+  // Allocate dummy objects at index 0 to guarantee that no objects allocated by
+  // the caller map to index 0.
+  ALLOC_DUMMY(&mem.cameras);
+  ALLOC_DUMMY(&mem.lights);
+  ALLOC_DUMMY(&mem.materials);
+  ALLOC_DUMMY(&mem.meshes);
+  ALLOC_DUMMY(&mem.mesh_links);
+  ALLOC_DUMMY(&mem.nodes);
+  ALLOC_DUMMY(&mem.objects);
+  ALLOC_DUMMY(&mem.scenes);
+}
+
+void scene_mem_destroy() {}
+
+// Memory allocation.
+SceneCamera* mem_alloc_camera() { return mempool_alloc(&mem.cameras); }
+Light* mem_alloc_light() { return mempool_alloc(&mem.lights); }
+Material* mem_alloc_material() { return mempool_alloc(&mem.materials); }
+Mesh* mem_alloc_mesh() { return mempool_alloc(&mem.meshes); }
+MeshLink* mem_alloc_mesh_link() { return mempool_alloc(&mem.mesh_links); }
+SceneNode* mem_alloc_node() { return mempool_alloc(&mem.nodes); }
+SceneObject* mem_alloc_object() { return mempool_alloc(&mem.objects); }
+Scene* mem_alloc_scene() { return mempool_alloc(&mem.scenes); }
+
+// Memory free.
+void mem_free_camera(SceneCamera** camera) {
+  mempool_free(&mem.cameras, camera);
+}
+void mem_free_light(Light** light) { mempool_free(&mem.lights, light); }
+void mem_free_material(Material** material) {
+  mempool_free(&mem.materials, material);
+}
+void mem_free_mesh(Mesh** mesh) { mempool_free(&mem.meshes, mesh); }
+void mem_free_mesh_link(MeshLink** mesh_link) {
+  mempool_free(&mem.mesh_links, mesh_link);
+}
+void mem_free_node(SceneNode** node) { mempool_free(&mem.nodes, node); }
+void mem_free_object(SceneObject** object) {
+  mempool_free(&mem.objects, object);
+}
+void mem_free_scene(Scene** scene) { mempool_free(&mem.scenes, scene); }
+
+// Query by index.
+SceneCamera* mem_get_camera(camera_idx index) {
+  return mempool_get_block(&mem.cameras, index.val);
+}
+Light* mem_get_light(light_idx index) {
+  return mempool_get_block(&mem.lights, index.val);
+}
+Material* mem_get_material(material_idx index) {
+  return mempool_get_block(&mem.materials, index.val);
+}
+Mesh* mem_get_mesh(mesh_idx index) {
+  return mempool_get_block(&mem.meshes, index.val);
+}
+MeshLink* mem_get_mesh_link(mesh_link_idx index) {
+  return mempool_get_block(&mem.mesh_links, index.val);
+}
+SceneNode* mem_get_node(node_idx index) {
+  return mempool_get_block(&mem.nodes, index.val);
+}
+SceneObject* mem_get_object(object_idx index) {
+  return mempool_get_block(&mem.objects, index.val);
+}
+Scene* mem_get_scene(scene_idx index) {
+  return mempool_get_block(&mem.scenes, index.val);
+}
+
+// Map object to index.
+camera_idx mem_get_camera_index(const SceneCamera* camera) {
+  return (camera_idx){.val = mempool_get_block_index(&mem.cameras, camera)};
+}
+light_idx mem_get_light_index(const Light* light) {
+  return (light_idx){.val = mempool_get_block_index(&mem.lights, light)};
+}
+material_idx mem_get_material_index(const Material* material) {
+  return (material_idx){.val =
+                            mempool_get_block_index(&mem.materials, material)};
+}
+mesh_idx mem_get_mesh_index(const Mesh* mesh) {
+  return (mesh_idx){.val = mempool_get_block_index(&mem.meshes, mesh)};
+}
+mesh_link_idx mem_get_mesh_link_index(const MeshLink* mesh_link) {
+  return (mesh_link_idx){
+      .val = mempool_get_block_index(&mem.mesh_links, mesh_link)};
+}
+node_idx mem_get_node_index(const SceneNode* node) {
+  return (node_idx){.val = mempool_get_block_index(&mem.nodes, node)};
+}
+object_idx mem_get_object_index(const SceneObject* object) {
+  return (object_idx){.val = mempool_get_block_index(&mem.objects, object)};
+}
+scene_idx mem_get_scene_index(const Scene* scene) {
+  return (scene_idx){.val = mempool_get_block_index(&mem.scenes, scene)};
+}
diff --git a/gfx/src/scene/scene_memory.h b/gfx/src/scene/scene_memory.h
new file mode 100644
index 0000000..dff5bd8
--- /dev/null
+++ b/gfx/src/scene/scene_memory.h
@@ -0,0 +1,130 @@
+/// Memory management of scene objects.
+#pragma once
+
+#include "types.h"
+
+typedef struct Light Light;
+typedef struct Material Material;
+typedef struct Mesh Mesh;
+typedef struct MeshLink MeshLink;
+typedef struct SceneCamera SceneCamera;
+typedef struct SceneNode SceneNode;
+typedef struct SceneObject SceneObject;
+typedef struct Scene Scene;
+
+/// Initialize scene memory.
+///
+/// The scene memory guarantees that every object maps to an index different
+/// than 0. In this way, 0 can be used as a special index to denote "no value".
+void scene_mem_init();
+
+/// Destroy the scene memory.
+void scene_mem_destroy();
+
+/// ----------------------------------------------------------------------------
+/// Memory allocation.
+/// ----------------------------------------------------------------------------
+
+/// Allocate space for a camera.
+SceneCamera* mem_alloc_camera();
+
+/// Allocate space for a light.
+Light* mem_alloc_light();
+
+/// Allocate space for a material.
+Material* mem_alloc_material();
+
+/// Allocate space for a mesh.
+Mesh* mem_alloc_mesh();
+
+/// Allocate space for a mesh link.
+MeshLink* mem_alloc_mesh_link();
+
+/// Allocate space for a scene node.
+SceneNode* mem_alloc_node();
+
+/// Allocate space for a scene object.
+SceneObject* mem_alloc_object();
+
+/// Allocate space for a scene.
+Scene* mem_alloc_scene();
+
+/// Free the camera.
+void mem_free_camera(SceneCamera**);
+
+/// Free the light.
+void mem_free_light(Light**);
+
+/// Free the material.
+void mem_free_material(Material**);
+
+/// Free the mesh.
+void mem_free_mesh(Mesh**);
+
+/// Free the mesh link.
+void mem_free_mesh_link(MeshLink**);
+
+/// Free the scene node.
+void mem_free_node(SceneNode**);
+
+/// Free the scene object.
+void mem_free_object(SceneObject**);
+
+/// Free the scene.
+void mem_free_scene(Scene**);
+
+/// ----------------------------------------------------------------------------
+/// Query objects by index.
+/// ----------------------------------------------------------------------------
+
+/// Get a camera by index.
+SceneCamera* mem_get_camera(camera_idx);
+
+/// Get a light by index.
+Light* mem_get_light(light_idx);
+
+/// Get a material by index.
+Material* mem_get_material(material_idx);
+
+/// Get a mesh by index.
+Mesh* mem_get_mesh(mesh_idx);
+
+/// Get a mesh link by index.
+MeshLink* mem_get_mesh_link(mesh_link_idx);
+
+/// Get a node by index.
+SceneNode* mem_get_node(node_idx);
+
+/// Get an object by index.
+SceneObject* mem_get_object(object_idx);
+
+/// Get a scene by index.
+Scene* mem_get_scene(scene_idx);
+
+/// ----------------------------------------------------------------------------
+/// Map objects to indices.
+/// ----------------------------------------------------------------------------
+
+/// Get the camera's index.
+camera_idx mem_get_camera_index(const SceneCamera*);
+
+/// Get the light's index.
+light_idx mem_get_light_index(const Light*);
+
+/// Get the material's index.
+material_idx mem_get_material_index(const Material*);
+
+/// Get the mesh's index.
+mesh_idx mem_get_mesh_index(const Mesh*);
+
+/// Get the mesh link's index.
+mesh_link_idx mem_get_mesh_link_index(const MeshLink*);
+
+/// Get the node's index.
+node_idx mem_get_node_index(const SceneNode*);
+
+/// Get the object's index.
+object_idx mem_get_object_index(const SceneObject*);
+
+/// Get the scene's index.
+scene_idx mem_get_scene_index(const Scene*);
diff --git a/gfx/src/scene/types.h b/gfx/src/scene/types.h
new file mode 100644
index 0000000..2863ac7
--- /dev/null
+++ b/gfx/src/scene/types.h
@@ -0,0 +1,21 @@
+#pragma once
+
+#include <stdint.h>
+
+typedef uint16_t gfx_idx;
+
+// Strongly-typed indices.
+
+#define DEF_STRONG_INDEX(TYPE_NAME)                                            \
+  typedef struct TYPE_NAME##_idx {                                             \
+    gfx_idx val;                                                               \
+  } TYPE_NAME##_idx;
+
+DEF_STRONG_INDEX(camera)
+DEF_STRONG_INDEX(light)
+DEF_STRONG_INDEX(material)
+DEF_STRONG_INDEX(mesh)
+DEF_STRONG_INDEX(mesh_link)
+DEF_STRONG_INDEX(node)
+DEF_STRONG_INDEX(object)
+DEF_STRONG_INDEX(scene)
diff --git a/gfx/src/util/geometry.c b/gfx/src/util/geometry.c
new file mode 100644
index 0000000..d485125
--- /dev/null
+++ b/gfx/src/util/geometry.c
@@ -0,0 +1,44 @@
+#include <gfx/util/geometry.h>
+
+#include <math/vec2.h>
+
+static void gfx_make_quad_11_positions(vec2 positions[4]) {
+  positions[0] = vec2_make(-1, +1);
+  positions[1] = vec2_make(-1, -1);
+  positions[2] = vec2_make(+1, +1);
+  positions[3] = vec2_make(+1, -1);
+}
+
+static void gfx_make_quad_01_positions(vec2 positions[4]) {
+  positions[0] = vec2_make(0, 0);
+  positions[1] = vec2_make(1, 0);
+  positions[2] = vec2_make(1, 1);
+  positions[3] = vec2_make(0, 1);
+}
+
+static GeometryDesc gfx_make_quad_desc(vec2 positions[4]) {
+  GeometryDesc desc = (GeometryDesc){0};
+  desc.positions2d.data = positions;
+  desc.positions2d.size_bytes = 4 * sizeof(vec2);
+  desc.num_verts = 4;
+  desc.type = TriangleStrip;
+  return desc;
+}
+
+Geometry* gfx_make_quad_11(RenderBackend* render_backend) {
+  assert(render_backend);
+
+  vec2 positions[4];
+  gfx_make_quad_11_positions(positions);
+  const GeometryDesc geometry_desc = gfx_make_quad_desc(positions);
+  return gfx_make_geometry(render_backend, &geometry_desc);
+}
+
+Geometry* gfx_make_quad_01(RenderBackend* render_backend) {
+  assert(render_backend);
+
+  vec2 positions[4];
+  gfx_make_quad_01_positions(positions);
+  const GeometryDesc geometry_desc = gfx_make_quad_desc(positions);
+  return gfx_make_geometry(render_backend, &geometry_desc);
+}
diff --git a/gfx/src/util/ibl.c b/gfx/src/util/ibl.c
new file mode 100644
index 0000000..704cf08
--- /dev/null
+++ b/gfx/src/util/ibl.c
@@ -0,0 +1,303 @@
+#include <gfx/util/ibl.h>
+
+#include <gfx/render_backend.h>
+#include <gfx/util/geometry.h>
+#include <gfx/util/shader.h>
+#include <math/mat4.h>
+
+#include <assert.h>
+#include <stdlib.h>
+
+typedef struct IBL {
+  Geometry* quad;
+  ShaderProgram* brdf_integration_map_shader;
+  ShaderProgram* irradiance_map_shader;
+  ShaderProgram* prefiltered_environment_map_shader;
+  Texture* brdf_integration_map;
+  FrameBuffer* framebuffer;
+  mat4 rotations[6];
+} IBL;
+
+static const CubemapFace faces[6] = {
+    CubemapFacePosX, // Right.
+    CubemapFaceNegX, // Left.
+    CubemapFacePosY, // Up.
+    CubemapFaceNegY, // Down.
+    CubemapFacePosZ, // Back.
+    CubemapFaceNegZ, // Forward.
+};
+
+IBL* gfx_make_ibl(RenderBackend* render_backend) {
+  assert(render_backend);
+
+  IBL* ibl = calloc(1, sizeof(IBL));
+  if (!ibl) {
+    return 0;
+  }
+
+  if (!(ibl->quad = gfx_make_quad_11(render_backend))) {
+    goto cleanup;
+  }
+
+  // We only need the BRDF integration once since we are caching the map, but
+  // compiling the shader up front may lead to fewer surprises. Not that the
+  // shader is fully compiled up front anyway, since the driver will typically
+  // defer full compilation to the first draw call.
+  if (!(ibl->brdf_integration_map_shader =
+            gfx_make_brdf_integration_map_shader(render_backend))) {
+    goto cleanup;
+  }
+
+  if (!(ibl->irradiance_map_shader =
+            gfx_make_irradiance_map_shader(render_backend))) {
+    goto cleanup;
+  }
+
+  if (!(ibl->prefiltered_environment_map_shader =
+            gfx_make_prefiltered_environment_map_shader(render_backend))) {
+    goto cleanup;
+  }
+
+  // Create an empty framebuffer for now. Will attach the colour buffer later
+  // as we render the faces of the cube.
+  if (!(ibl->framebuffer = gfx_make_framebuffer(
+            render_backend,
+            &(FrameBufferDesc){
+                .colour =
+                    (FrameBufferAttachment){.type = FrameBufferNoAttachment},
+                .depth = (FrameBufferAttachment){
+                    .type = FrameBufferNoAttachment}}))) {
+    goto cleanup;
+  }
+
+  // Right.
+  ibl->rotations[0] = mat4_lookat(/*position=*/vec3_make(0, 0, 0),
+                                  /*target=*/vec3_make(1, 0, 0),
+                                  /*up=*/vec3_make(0, 1, 0));
+  // Left.
+  ibl->rotations[1] = mat4_lookat(/*position=*/vec3_make(0, 0, 0),
+                                  /*target=*/vec3_make(-1, 0, 0),
+                                  /*up=*/vec3_make(0, 1, 0));
+  // Up.
+  ibl->rotations[2] = mat4_lookat(/*position=*/vec3_make(0, 0, 0),
+                                  /*target=*/vec3_make(0, 1, 0),
+                                  /*up=*/vec3_make(0, 0, 1));
+  // Down.
+  ibl->rotations[3] = mat4_lookat(/*position=*/vec3_make(0, 0, 0),
+                                  /*target=*/vec3_make(0, -1, 0),
+                                  /*up=*/vec3_make(0, 0, -1));
+  // Back.
+  ibl->rotations[4] = mat4_lookat(/*position=*/vec3_make(0, 0, 0),
+                                  /*target=*/vec3_make(0, 0, 1),
+                                  /*up=*/vec3_make(0, 1, 0));
+  // Forward.
+  ibl->rotations[5] = mat4_lookat(/*position=*/vec3_make(0, 0, 0),
+                                  /*target=*/vec3_make(0, 0, -1),
+                                  /*up=*/vec3_make(0, 1, 0));
+
+  return ibl;
+
+cleanup:
+  gfx_destroy_ibl(render_backend, &ibl);
+  return 0;
+}
+
+void gfx_destroy_ibl(RenderBackend* render_backend, IBL** ibl) {
+  if (!ibl) {
+    return;
+  }
+  if ((*ibl)->quad) {
+    gfx_destroy_geometry(render_backend, &(*ibl)->quad);
+  }
+  if ((*ibl)->brdf_integration_map_shader) {
+    gfx_destroy_shader_program(render_backend,
+                               &(*ibl)->brdf_integration_map_shader);
+  }
+  if ((*ibl)->irradiance_map_shader) {
+    gfx_destroy_shader_program(render_backend, &(*ibl)->irradiance_map_shader);
+  }
+  if ((*ibl)->prefiltered_environment_map_shader) {
+    gfx_destroy_shader_program(render_backend,
+                               &(*ibl)->prefiltered_environment_map_shader);
+  }
+  if ((*ibl)->brdf_integration_map) {
+    gfx_destroy_texture(render_backend, &(*ibl)->brdf_integration_map);
+  }
+  if ((*ibl)->framebuffer) {
+    gfx_destroy_framebuffer(render_backend, &(*ibl)->framebuffer);
+  }
+  free(*ibl);
+  *ibl = 0;
+}
+
+Texture* gfx_make_brdf_integration_map(IBL* ibl, RenderBackend* render_backend,
+                                       int width, int height) {
+  assert(ibl);
+  assert(render_backend);
+
+  if (ibl->brdf_integration_map) {
+    return ibl->brdf_integration_map;
+  }
+
+  bool success = false;
+
+  if (!(ibl->brdf_integration_map = gfx_make_texture(
+            render_backend, &(TextureDesc){.width = width,
+                                           .height = height,
+                                           .depth = 1,
+                                           .dimension = Texture2D,
+                                           .format = TextureRG16,
+                                           .filtering = LinearFiltering,
+                                           .wrap = ClampToEdge,
+                                           .mipmaps = false}))) {
+    goto cleanup;
+  }
+
+  gfx_activate_framebuffer(ibl->framebuffer);
+  gfx_framebuffer_set_viewport(ibl->framebuffer, 0, 0, width, height);
+  gfx_activate_shader_program(ibl->brdf_integration_map_shader);
+  if (!gfx_framebuffer_attach_colour(
+          ibl->framebuffer,
+          &(FrameBufferAttachment){.type = FrameBufferTexture,
+                                   .texture.texture = ibl->brdf_integration_map,
+                                   .texture.mip_level = 0})) {
+    goto cleanup;
+  }
+  gfx_render_geometry(ibl->quad);
+
+  success = true;
+
+cleanup:
+  gfx_deactivate_shader_program(ibl->brdf_integration_map_shader);
+  gfx_deactivate_framebuffer(ibl->framebuffer);
+  if (!success && ibl->brdf_integration_map) {
+    gfx_destroy_texture(render_backend, &ibl->brdf_integration_map);
+    return 0;
+  } else {
+    return ibl->brdf_integration_map;
+  }
+}
+
+Texture* gfx_make_irradiance_map(IBL* ibl, RenderBackend* render_backend,
+                                 const Texture* environment_map, int width,
+                                 int height) {
+  assert(ibl);
+  assert(render_backend);
+  assert(environment_map);
+
+  Texture* irradiance_map = 0;
+  bool success = false;
+
+  // TODO: Could define colour-renderable texture formats separately to make
+  // framebuffer creation less error-prone. Or, at the very least, validate the
+  // choice at runtime.
+  if (!(irradiance_map = gfx_make_texture(
+            render_backend, &(TextureDesc){.width = width,
+                                           .height = height,
+                                           .depth = 1,
+                                           .dimension = TextureCubeMap,
+                                           .format = TextureRGBA8,
+                                           .filtering = NearestFiltering,
+                                           .mipmaps = false}))) {
+    goto cleanup;
+  }
+
+  gfx_activate_framebuffer(ibl->framebuffer);
+  gfx_framebuffer_set_viewport(ibl->framebuffer, 0, 0, width, height);
+  gfx_activate_shader_program(ibl->irradiance_map_shader);
+  gfx_set_texture_uniform(ibl->irradiance_map_shader, "Sky", environment_map);
+  for (int i = 0; i < 6; ++i) {
+    if (!gfx_framebuffer_attach_colour(
+            ibl->framebuffer,
+            &(FrameBufferAttachment){.type = FrameBufferCubemapTexture,
+                                     .cubemap.face = faces[i],
+                                     .cubemap.texture = irradiance_map})) {
+      goto cleanup;
+    }
+    gfx_set_mat4_uniform(ibl->irradiance_map_shader, "Modelview",
+                         &ibl->rotations[i]);
+    gfx_apply_uniforms(ibl->irradiance_map_shader);
+    gfx_render_geometry(ibl->quad);
+  }
+
+  success = true;
+
+cleanup:
+  gfx_deactivate_shader_program(ibl->irradiance_map_shader);
+  gfx_deactivate_framebuffer(ibl->framebuffer);
+  if (!success && irradiance_map) {
+    gfx_destroy_texture(render_backend, &irradiance_map);
+    return 0;
+  } else {
+    return irradiance_map;
+  }
+}
+
+Texture* gfx_make_prefiltered_environment_map(IBL* ibl,
+                                              RenderBackend* render_backend,
+                                              const Texture* environment_map,
+                                              int width, int height,
+                                              int* max_mip_level) {
+  assert(ibl);
+  assert(render_backend);
+  assert(environment_map);
+  assert(max_mip_level);
+
+  Texture* prefiltered_env_map = 0;
+  bool success = false;
+
+  // TODO: Use 16 bits for more precision and a floating-point format, e.g.
+  // RGB16F.
+  if (!(prefiltered_env_map = gfx_make_texture(
+            render_backend, &(TextureDesc){.width = width,
+                                           .height = height,
+                                           .depth = 1,
+                                           .dimension = TextureCubeMap,
+                                           .format = TextureRGBA8,
+                                           .filtering = LinearFiltering,
+                                           .mipmaps = true}))) {
+    goto cleanup;
+  }
+
+  gfx_activate_framebuffer(ibl->framebuffer);
+  gfx_activate_shader_program(ibl->prefiltered_environment_map_shader);
+  gfx_set_texture_uniform(ibl->prefiltered_environment_map_shader, "Sky",
+                          environment_map);
+  const int max_mip = (int)(rlog2(min(width, height)));
+  for (int mip = 0; mip <= max_mip; ++mip) {
+    const int mip_width = width >> mip;
+    const int mip_height = height >> mip;
+    const float roughness = (float)mip / (float)(max_mip);
+    gfx_framebuffer_set_viewport(ibl->framebuffer, 0, 0, mip_width, mip_height);
+    gfx_set_float_uniform(ibl->prefiltered_environment_map_shader, "Roughness",
+                          roughness);
+
+    for (int i = 0; i < 6; ++i) {
+      if (!gfx_framebuffer_attach_colour(
+              ibl->framebuffer, &(FrameBufferAttachment){
+                                    .type = FrameBufferCubemapTexture,
+                                    .cubemap.face = faces[i],
+                                    .cubemap.mip_level = mip,
+                                    .cubemap.texture = prefiltered_env_map})) {
+        goto cleanup;
+      }
+      gfx_set_mat4_uniform(ibl->prefiltered_environment_map_shader, "Modelview",
+                           &ibl->rotations[i]);
+      gfx_apply_uniforms(ibl->prefiltered_environment_map_shader);
+      gfx_render_geometry(ibl->quad);
+    }
+  }
+
+  *max_mip_level = max_mip;
+  success = true;
+
+cleanup:
+  gfx_deactivate_shader_program(ibl->prefiltered_environment_map_shader);
+  gfx_deactivate_framebuffer(ibl->framebuffer);
+  if (!success && prefiltered_env_map) {
+    gfx_destroy_texture(render_backend, &prefiltered_env_map);
+    return 0;
+  } else {
+    return prefiltered_env_map;
+  }
+}
diff --git a/gfx/src/util/scene.c b/gfx/src/util/scene.c
new file mode 100644
index 0000000..9511a71
--- /dev/null
+++ b/gfx/src/util/scene.c
@@ -0,0 +1,1193 @@
+/// Loads scenes from memory and files.
+///
+/// Only the GLTF scene format is current supported.
+///
+/// ----------------------------------------------------------------------------
+/// glTF File Format Documentation
+/// ----------------------------------------------------------------------------
+///
+/// cgltf:
+/// https://github.com/jkuhlmann/cgltf
+///
+/// gltf overview:
+/// https://raw.githubusercontent.com/KhronosGroup/glTF/master/specification/2.0/figures/gltfOverview-2.0.0b.png
+///
+/// gltf spec:
+/// https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md
+///
+/// Sample models:
+/// https://github.com/KhronosGroup/glTF-Sample-Models/tree/master/2.0
+/// https://github.com/KhronosGroup/glTF-Sample-Models/blob/master/2.0/Sponza/glTF/Sponza.gltf
+/// https://github.com/KhronosGroup/glTF-Sample-Models/blob/master/2.0/AlphaBlendModeTest/glTF/AlphaBlendModeTest.gltf
+/// https://github.com/KhronosGroup/glTF-Sample-Models/blob/master/2.0/Buggy/glTF/Buggy.gltf
+/// https://github.com/KhronosGroup/glTF-Sample-Models/blob/master/2.0/AntiqueCamera/glTF/AntiqueCamera.gltf
+/// https://github.com/KhronosGroup/glTF-Sample-Models/blob/master/2.0/DamagedHelmet/glTF/DamagedHelmet.gltf
+///
+/// ----------------------------------------------------------------------------
+/// Implementation Notes
+/// ----------------------------------------------------------------------------
+///
+/// # glTF and the gfx library
+///
+/// glTF has concepts that are similar to those in the gfx library, but there
+/// isn't an exact 1-1 mapping. Concepts map as follows:
+///
+///   glTF                           gfx
+///   ----                           ---
+///   buffer                         Buffer
+///   accessor + buffer view         BufferView
+///   mesh primitive (geom + mat)    Mesh (also geom + mat)
+///   mesh                           SceneObject
+///   node                           SceneNode
+///
+/// glTF buffers map 1-1 with gfx Buffers. glTF scenes make heavy re-use of
+/// buffers across views/accessors/meshes, so it is important to make that same
+/// re-use in the gfx library to use the data effectively and without
+/// duplication. The Sponza scene, for example, has all of its data in one giant
+/// buffer.
+///
+/// glTF accessors and buffer views are combined and mapped to gfx BufferViews.
+/// The glTF buffer view's offset/length/stride are combined with the accessor's
+/// offset, and together with the remaining information of both data structures
+/// baked into a BufferView. Internally, this information is fed into
+/// glVertexAttribPointer() calls, wrapped in a VAO (index view/accessor
+/// information is fed into glDrawElements()). This baking should not hurt
+/// re-use, at least in the OpenGL world.
+///
+/// A glTF mesh primitive contains a piece of geometry and a material. This maps
+/// directly to a gfx Mesh.
+///
+/// A glTF mesh is a list of mesh primitives. This maps nicely to a gfx
+/// SceneObject, with the only inconvenience that terminology gets a little
+/// confusing.
+///
+/// Finally, glTF nodes map directly to gfx SceneNodes. Both enforce a strict
+/// tree hierarchy; DAGs are not supported.
+///
+/// # Materials
+///
+/// glTF uses the metallic-roughness material model. However, an extension
+/// allows a scene to use the specular-glossiness model as well and cgltf
+/// supports it:
+///
+/// https://kcoley.github.io/glTF/extensions/2.0/Khronos/KHR_materials_pbrSpecularGlossiness/
+///
+/// From the docs, the specular-glossiness model can represent more materials
+/// than the metallic-roughness model, but it is also more computationally
+/// expensive. Furthermore, a material in glTF can specify parameters for both
+/// models, leaving it up to the implementation to decide which one to use.
+/// In our case, we use the specular-glosiness model if parameters for it are
+/// provided, otherwise we use the metallic-roughness model.
+
+#include <gfx/util/scene.h>
+
+#include <gfx/error.h>
+#include <gfx/gfx.h>
+#include <gfx/render_backend.h>
+#include <gfx/scene/camera.h>
+#include <gfx/scene/material.h>
+#include <gfx/scene/mesh.h>
+#include <gfx/scene/node.h>
+#include <gfx/scene/object.h>
+#include <gfx/scene/scene.h>
+#include <gfx/util/texture.h>
+
+#include <cstring.h>
+#include <log/log.h>
+#include <math/camera.h>
+#include <math/mat4.h>
+#include <math/quat.h>
+#include <math/vec2.h>
+#include <math/vec3.h>
+
+#include <cgltf_tangents.h>
+#define CGLTF_IMPLEMENTATION
+#include <cgltf.h>
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stdlib.h>
+
+// Taken from the GL header file.
+#define GL_NEAREST                0x2600
+#define GL_LINEAR                 0x2601
+#define GL_NEAREST_MIPMAP_NEAREST 0x2700
+#define GL_LINEAR_MIPMAP_NEAREST  0x2701
+#define GL_NEAREST_MIPMAP_LINEAR  0x2702
+#define GL_LINEAR_MIPMAP_LINEAR   0x2703
+
+// Uniforms names. Must match the names in shaders.
+#define UNIFORM_BASE_COLOR_FACTOR          "BaseColorFactor"
+#define UNIFORM_METALLIC_FACTOR            "MetallicFactor"
+#define UNIFORM_ROUGHNESS_FACTOR           "RoughnessFactor"
+#define UNIFORM_EMISSIVE_FACTOR            "EmissiveFactor"
+#define UNIFORM_BASE_COLOR_TEXTURE         "BaseColorTexture"
+#define UNIFORM_METALLIC_ROUGHNESS_TEXTURE "MetallicRoughnessTexture"
+#define UNIFORM_EMISSIVE_TEXTURE           "EmissiveTexture"
+#define UNIFORM_AMBIENT_OCCLUSION_TEXTURE  "AmbientOcclusionTexture"
+#define UNIFORM_NORMAL_MAP                 "NormalMap"
+
+typedef enum TextureType {
+  BaseColorTexture,
+  MetallicRoughnessTexture,
+  EmissiveTexture,
+  AmbientOcclusionTexture,
+  NormalMap,
+} TextureType;
+
+/// Describes the properties of a mesh.
+/// This is used to create shader permutations.
+typedef struct MeshPermutation {
+  union {
+    struct {
+      // Vertex attributes.
+      bool has_normals  : 1;
+      bool has_tangents : 1;
+      // Textures.
+      bool has_normal_map        : 1;
+      bool has_occlusion_texture : 1;
+      bool has_emissive_texture  : 1;
+    };
+    int32_t all;
+  };
+} MeshPermutation;
+
+/// Map a texture type to the name of the shader uniform used to access the
+/// texture.
+static const char* TextureUniformName(TextureType type) {
+  switch (type) {
+  case BaseColorTexture:
+    return UNIFORM_BASE_COLOR_TEXTURE;
+  case MetallicRoughnessTexture:
+    return UNIFORM_METALLIC_ROUGHNESS_TEXTURE;
+  case EmissiveTexture:
+    return UNIFORM_EMISSIVE_TEXTURE;
+  case AmbientOcclusionTexture:
+    return UNIFORM_AMBIENT_OCCLUSION_TEXTURE;
+  case NormalMap:
+    return UNIFORM_NORMAL_MAP;
+  default:
+    assert(false);
+    return 0;
+  }
+}
+
+/// Map a glTF primitive type to a gfx primitive type.
+static PrimitiveType from_gltf_primitive_type(cgltf_primitive_type type) {
+  switch (type) {
+  case cgltf_primitive_type_triangles:
+    return Triangles;
+  case cgltf_primitive_type_triangle_fan:
+    return TriangleFan;
+  case cgltf_primitive_type_triangle_strip:
+    return TriangleStrip;
+  default:
+    LOGE("Unsupported primitive type: %d", type);
+    assert(false);
+    return 0;
+  }
+}
+
+/// Return the total number of primitives in the scene. Each mesh may contain
+/// multiple primitives.
+///
+/// Note that this function scans all of the scenes in the glTF data.
+static size_t get_total_primitives(const cgltf_data* data) {
+  size_t total = 0;
+  for (cgltf_size i = 0; i < data->meshes_count; ++i) {
+    total += data->meshes[i].primitives_count;
+  }
+  return total;
+}
+
+/// Load all buffers from the glTF scene.
+///
+/// If buffer data is loaded from memory, set filepath = null.
+///
+/// Return an array of Buffers such that the index of each glTF buffer in
+/// the original array matches the same Buffer in the resulting array.
+static Buffer** load_buffers(
+    const cgltf_data* data, RenderBackend* render_backend,
+    cgltf_size* num_buffers) {
+  assert(data);
+  assert(render_backend);
+  assert(num_buffers);
+
+  Buffer** buffers = 0;
+
+  buffers = calloc(data->buffers_count, sizeof(Buffer*));
+  if (!buffers) {
+    goto cleanup;
+  }
+
+  for (cgltf_size i = 0; i < data->buffers_count; ++i) {
+    const cgltf_buffer* buffer = &data->buffers[i];
+    assert(buffer->data);
+    buffers[i] = gfx_make_buffer(render_backend, buffer->data, buffer->size);
+    if (!buffers[i]) {
+      goto cleanup;
+    }
+  }
+  *num_buffers = data->buffers_count;
+  return buffers;
+
+cleanup:
+  if (buffers) {
+    for (cgltf_size i = 0; i < data->buffers_count; ++i) {
+      if (buffers[i]) {
+        gfx_destroy_buffer(render_backend, &buffers[i]);
+      }
+    }
+    free(buffers);
+  }
+  *num_buffers = 0;
+  return 0;
+}
+
+/// Load tangent buffers.
+static Buffer** load_tangent_buffers(
+    const cgltfTangentBuffer* tangent_buffers, cgltf_size num_tangent_buffers,
+    RenderBackend* render_backend) {
+  assert(tangent_buffers);
+  assert(render_backend);
+
+  Buffer** buffers = 0;
+
+  buffers = calloc(num_tangent_buffers, sizeof(Buffer*));
+  if (!buffers) {
+    goto cleanup;
+  }
+
+  for (cgltf_size i = 0; i < num_tangent_buffers; ++i) {
+    const cgltfTangentBuffer* buffer = &tangent_buffers[i];
+    assert(buffer->data);
+    buffers[i] =
+        gfx_make_buffer(render_backend, buffer->data, buffer->size_bytes);
+    if (!buffers[i]) {
+      goto cleanup;
+    }
+  }
+
+  return buffers;
+
+cleanup:
+  if (buffers) {
+    for (cgltf_size i = 0; i < num_tangent_buffers; ++i) {
+      if (buffers[i]) {
+        gfx_destroy_buffer(render_backend, &buffers[i]);
+      }
+    }
+    free(buffers);
+  }
+  return 0;
+}
+
+/// Load all textures from the glTF scene.
+///
+/// Return an array of Textures such that the index of each glTF texture in the
+/// original array matches the same Texture in the resulting array.
+///
+/// Most textures are in sRGB colour space. One exception is normal maps, which
+/// are typically authored in linear space (e.g. DamagedHelmet sample). Since
+/// we don't know what colour space we should use at this point, we load the
+/// textures lazily and don't actually commit them to GPU memory until we know
+/// their colour space.
+///
+/// This function returns an array of Texture objects, all of which are null due
+/// to lazy loading. It also returns an array of LoadTextureCmd which describes
+/// how each Texture in the first array should be loaded.
+static Texture** load_textures(
+    const cgltf_data* data, RenderBackend* render_backend,
+    const char* directory, LoadTextureCmd** load_texture_cmds,
+    cgltf_size* num_textures) {
+  assert(data);
+  assert(render_backend);
+  assert(num_textures);
+
+  Texture** textures = 0;
+  *load_texture_cmds = 0;
+
+  textures = calloc(data->textures_count, sizeof(Texture*));
+  if (!textures) {
+    goto cleanup;
+  }
+
+  *load_texture_cmds = calloc(data->textures_count, sizeof(LoadTextureCmd));
+  if (!*load_texture_cmds) {
+    goto cleanup;
+  }
+
+  for (cgltf_size i = 0; i < data->textures_count; ++i) {
+    const cgltf_texture* texture = &data->textures[i];
+    const cgltf_image*   image   = texture->image;
+    const cgltf_sampler* sampler = texture->sampler;
+
+    // glTF models might not specify a sampler. In such case, the client can
+    // pick its own defaults.
+    // https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html#samplers
+    bool             mipmaps   = true;
+    TextureFiltering filtering = LinearFiltering;
+    TextureWrapping  wrap      = Repeat;
+
+    if (sampler) {
+      // The gfx library does not distinguish between sampling the texture and
+      // combining the mipmap levels.
+      const cgltf_int filter =
+          sampler->min_filter == 0 ? sampler->mag_filter : sampler->min_filter;
+
+      switch (filter) {
+      case GL_NEAREST_MIPMAP_NEAREST:
+        mipmaps   = true;
+        filtering = NearestFiltering;
+        break;
+      case GL_NEAREST_MIPMAP_LINEAR:
+      case GL_LINEAR_MIPMAP_NEAREST:
+      case GL_LINEAR_MIPMAP_LINEAR:
+        mipmaps   = true;
+        filtering = LinearFiltering;
+        break;
+      case GL_NEAREST:
+        filtering = NearestFiltering;
+        break;
+      case GL_LINEAR:
+        filtering = LinearFiltering;
+        break;
+      default:
+        break;
+      }
+    }
+
+    // Currently only supporting loading textures from files.
+    assert(image->uri);
+    assert(directory);
+    mstring fullpath =
+        mstring_concat_path(mstring_make(directory), mstring_make(image->uri));
+
+    (*load_texture_cmds)[i] = (LoadTextureCmd){
+        .origin                = TextureFromFile,
+        .type                  = LoadTexture,
+        .colour_space          = sRGB,
+        .filtering             = filtering,
+        .wrap                  = wrap,
+        .mipmaps               = mipmaps,
+        .data.texture.filepath = fullpath};
+  }
+
+  *num_textures = data->textures_count;
+  return textures;
+
+cleanup:
+  if (textures) {
+    for (cgltf_size i = 0; i < data->textures_count; ++i) {
+      if (textures[i]) {
+        gfx_destroy_texture(render_backend, &textures[i]);
+      }
+    }
+    free(textures);
+  }
+  if (*load_texture_cmds) {
+    free(*load_texture_cmds);
+  }
+  *num_textures = 0;
+  return 0;
+}
+
+/// Load a texture uniform.
+///
+/// This determines a texture's colour space based on its intended use, loads
+/// the texture, and then defines the sampler shader uniform.
+static bool load_texture_uniform(
+    const cgltf_data* data, RenderBackend* render_backend,
+    const cgltf_texture_view* texture_view, TextureType texture_type,
+    Texture** textures, LoadTextureCmd* load_texture_cmds, int* next_uniform,
+    MaterialDesc* desc) {
+  assert(data);
+  assert(render_backend);
+  assert(texture_view);
+  assert(textures);
+  assert(next_uniform);
+  assert(desc);
+  assert(*next_uniform < GFX_MAX_UNIFORMS_PER_MATERIAL);
+
+  const size_t texture_index = texture_view->texture - data->textures;
+  assert(texture_index < data->textures_count);
+
+  LoadTextureCmd* cmd = &load_texture_cmds[texture_index];
+  if (texture_type == NormalMap) {
+    cmd->colour_space = LinearColourSpace;
+  }
+
+  LOGD(
+      "Load texture: %s (mipmaps: %d, filtering: %d)",
+      mstring_cstring(&cmd->data.texture.filepath), cmd->mipmaps,
+      cmd->filtering);
+
+  textures[texture_index] = gfx_load_texture(render_backend, cmd);
+  if (!textures[texture_index]) {
+    gfx_prepend_error(
+        "Failed to load texture: %s",
+        mstring_cstring(&cmd->data.texture.filepath));
+    return false;
+  }
+
+  desc->uniforms[(*next_uniform)++] = (ShaderUniform){
+      .name          = sstring_make(TextureUniformName(texture_type)),
+      .type          = UniformTexture,
+      .value.texture = textures[texture_index]};
+
+  return true;
+}
+
+/// Load all materials from the glTF scene.
+///
+/// Return an array of Materials such that the index of each glTF material in
+/// the original array matches the same Material in the resulting array.
+static Material** load_materials(
+    const cgltf_data* data, RenderBackend* render_backend,
+    ShaderProgram* shader, Texture** textures,
+    LoadTextureCmd* load_texture_cmds, cgltf_size* num_materials) {
+  assert(data);
+  assert(render_backend);
+  assert(shader);
+  assert(textures);
+  assert(load_texture_cmds);
+  assert(num_materials);
+
+  Material** materials = 0;
+
+  materials = calloc(data->materials_count, sizeof(Material*));
+  if (!materials) {
+    goto cleanup;
+  }
+
+  for (cgltf_size i = 0; i < data->materials_count; ++i) {
+    const cgltf_material* mat = &data->materials[i];
+
+    int          next_uniform = 0;
+    MaterialDesc desc         = (MaterialDesc){.shader = shader};
+
+    // TODO: emissive texture/factor and other material parameters.
+    if (mat->has_pbr_metallic_roughness) {
+      const cgltf_pbr_metallic_roughness* pbr = &mat->pbr_metallic_roughness;
+
+      assert(next_uniform + 3 < GFX_MAX_UNIFORMS_PER_MATERIAL);
+
+      desc.uniforms[next_uniform++] = (ShaderUniform){
+          .name       = sstring_make(UNIFORM_BASE_COLOR_FACTOR),
+          .type       = UniformVec4,
+          .value.vec4 = vec4_from_array(pbr->base_color_factor)};
+
+      desc.uniforms[next_uniform++] = (ShaderUniform){
+          .name         = sstring_make(UNIFORM_METALLIC_FACTOR),
+          .type         = UniformFloat,
+          .value.scalar = pbr->metallic_factor};
+
+      desc.uniforms[next_uniform++] = (ShaderUniform){
+          .name         = sstring_make(UNIFORM_ROUGHNESS_FACTOR),
+          .type         = UniformFloat,
+          .value.scalar = pbr->roughness_factor};
+
+      if (pbr->base_color_texture.texture) {
+        if (!load_texture_uniform(
+                data, render_backend, &pbr->base_color_texture,
+                BaseColorTexture, textures, load_texture_cmds, &next_uniform,
+                &desc)) {
+          goto cleanup;
+        }
+      }
+
+      if (pbr->metallic_roughness_texture.texture) {
+        if (!load_texture_uniform(
+                data, render_backend, &pbr->metallic_roughness_texture,
+                MetallicRoughnessTexture, textures, load_texture_cmds,
+                &next_uniform, &desc)) {
+          goto cleanup;
+        }
+      }
+    }
+
+    desc.uniforms[next_uniform++] = (ShaderUniform){
+        .name       = sstring_make(UNIFORM_EMISSIVE_FACTOR),
+        .type       = UniformVec3,
+        .value.vec3 = vec3_from_array(mat->emissive_factor)};
+
+    if (mat->emissive_texture.texture) {
+      if (!load_texture_uniform(
+              data, render_backend, &mat->emissive_texture, EmissiveTexture,
+              textures, load_texture_cmds, &next_uniform, &desc)) {
+        goto cleanup;
+      }
+    }
+
+    if (mat->occlusion_texture.texture) {
+      if (!load_texture_uniform(
+              data, render_backend, &mat->occlusion_texture,
+              AmbientOcclusionTexture, textures, load_texture_cmds,
+              &next_uniform, &desc)) {
+        goto cleanup;
+      }
+    }
+
+    if (mat->normal_texture.texture) {
+      if (!load_texture_uniform(
+              data, render_backend, &mat->normal_texture, NormalMap, textures,
+              load_texture_cmds, &next_uniform, &desc)) {
+        goto cleanup;
+      }
+    }
+
+    assert(next_uniform < GFX_MAX_UNIFORMS_PER_MATERIAL);
+    desc.num_uniforms = next_uniform;
+
+    materials[i] = gfx_make_material(&desc);
+    if (!materials[i]) {
+      goto cleanup;
+    }
+  }
+
+  *num_materials = data->materials_count;
+  return materials;
+
+cleanup:
+  if (materials) {
+    for (cgltf_size i = 0; i < data->materials_count; ++i) {
+      if (materials[i]) {
+        gfx_destroy_material(&materials[i]);
+      }
+    }
+    free(materials);
+  }
+  *num_materials = 0;
+  return 0;
+}
+
+/// Configures the MeshPermutation based on the given material.
+static void configure_material_permutation(
+    MeshPermutation* perm, cgltf_material* material) {
+  assert(perm);
+  assert(material);
+
+  perm->has_normal_map        = material->normal_texture.texture != 0;
+  perm->has_occlusion_texture = material->occlusion_texture.texture != 0;
+  perm->has_emissive_texture  = material->emissive_texture.texture != 0;
+}
+
+/// Load all meshes from the glTF scene.
+static SceneObject** load_meshes(
+    const cgltf_data* data, Gfx* gfx, Buffer** buffers,
+    Buffer** tangent_buffers, Material** materials,
+    const cgltfTangentBuffer* cgltf_tangent_buffers,
+    cgltf_size num_tangent_buffers, Geometry*** geometries, Mesh*** meshes,
+    MeshPermutation** mesh_permutations, cgltf_size* num_geometries,
+    cgltf_size* num_meshes, cgltf_size* num_scene_objects) {
+  // Walk through the mesh primitives to create Meshes. A GLTF mesh primitive
+  // has a material (Mesh) and vertex data (Geometry). A GLTF mesh maps to
+  // a SceneObject.
+  //
+  // glTF                      gfx
+  // ----                      ---
+  // Mesh                      SceneObject
+  // Mesh primitive            Mesh / Geometry
+  // Accessor + buffer view    BufferView
+  // Buffer                    Buffer
+  assert(data);
+  assert(gfx);
+  assert(buffers);
+  assert(materials);
+  assert(geometries);
+  assert(meshes);
+  assert(mesh_permutations);
+  assert(num_geometries);
+  assert(num_meshes);
+  assert(num_scene_objects);
+  if (num_tangent_buffers > 0) {
+    assert(tangent_buffers);
+    assert(cgltf_tangent_buffers);
+  }
+
+  // TODO: pass render_backend as argument instead of gfx.
+  RenderBackend* render_backend = gfx_get_render_backend(gfx);
+
+  const size_t primitive_count = get_total_primitives(data);
+
+  *geometries = calloc(primitive_count, sizeof(Geometry*));
+  if (!*geometries) {
+    goto cleanup;
+  }
+  *meshes = calloc(primitive_count, sizeof(Mesh*));
+  if (!*meshes) {
+    goto cleanup;
+  }
+  *mesh_permutations = calloc(primitive_count, sizeof(MeshPermutation));
+  if (!*mesh_permutations) {
+    goto cleanup;
+  }
+  SceneObject** objects = calloc(data->meshes_count, sizeof(SceneObject*));
+  if (!objects) {
+    goto cleanup;
+  }
+
+  // Points to the next available Mesh and also the next available Geometry.
+  // There is one (Mesh, Geometry) pair per glTF mesh primitive.
+  size_t next_mesh = 0;
+
+  for (cgltf_size m = 0; m < data->meshes_count; ++m) {
+    const cgltf_mesh* mesh = &data->meshes[m];
+
+    objects[m] = gfx_make_object();
+    if (!objects[m]) {
+      goto cleanup;
+    }
+
+    for (cgltf_size p = 0; p < mesh->primitives_count; ++p) {
+      assert(next_mesh < primitive_count);
+      const cgltf_primitive* prim = &mesh->primitives[p];
+      MeshPermutation*       perm = mesh_permutations[next_mesh];
+
+      GeometryDesc geometry_desc = {
+          .type = from_gltf_primitive_type(prim->type)};
+
+      // Vertex indices.
+      if (prim->indices) {
+        const cgltf_accessor*    accessor     = prim->indices;
+        const cgltf_buffer_view* view         = prim->indices->buffer_view;
+        const cgltf_size         buffer_index = view->buffer - data->buffers;
+        assert(buffer_index < data->buffers_count);
+        const Buffer* buffer               = buffers[buffer_index];
+        geometry_desc.indices.buffer       = buffer;
+        geometry_desc.indices.offset_bytes = accessor->offset + view->offset;
+        geometry_desc.indices.size_bytes   = view->size;
+        geometry_desc.indices.stride_bytes = view->stride;
+        geometry_desc.num_indices          = prim->indices->count;
+      }
+
+      // Vertex attributes.
+      for (cgltf_size a = 0; a < prim->attributes_count; ++a) {
+        const cgltf_attribute*   attrib       = &prim->attributes[a];
+        const cgltf_accessor*    accessor     = attrib->data;
+        const cgltf_buffer_view* view         = accessor->buffer_view;
+        const cgltf_size         offset       = accessor->offset + view->offset;
+        const cgltf_size         buffer_index = view->buffer - data->buffers;
+        assert(buffer_index < data->buffers_count);
+        const Buffer* buffer = buffers[buffer_index];
+
+        BufferView2d* buffer_view_2d = 0;
+        BufferView3d* buffer_view_3d = 0;
+        BufferView4d* buffer_view_4d = 0;
+
+        switch (attrib->type) {
+        case cgltf_attribute_type_position: {
+          switch (accessor->type) {
+          case cgltf_type_vec2:
+            assert(geometry_desc.positions3d.buffer == 0);
+            buffer_view_2d = &geometry_desc.positions2d;
+            break;
+          case cgltf_type_vec3:
+            assert(geometry_desc.positions2d.buffer == 0);
+            buffer_view_3d = &geometry_desc.positions3d;
+            break;
+          default:
+            LOGE(
+                "Unhandled accessor type %d in vertex positions",
+                accessor->type);
+            assert(false);
+            break;
+          }
+          break;
+        }
+        case cgltf_attribute_type_normal:
+          buffer_view_3d    = &geometry_desc.normals;
+          perm->has_normals = true;
+          break;
+        case cgltf_attribute_type_tangent:
+          buffer_view_4d     = &geometry_desc.tangents;
+          perm->has_tangents = true;
+          break;
+        case cgltf_attribute_type_texcoord:
+          buffer_view_2d = &geometry_desc.texcoords;
+          break;
+        default:
+          // Attribute ignored.
+          break;
+        }
+
+        if (buffer_view_2d) {
+          buffer_view_2d->buffer       = buffer;
+          buffer_view_2d->offset_bytes = offset;
+          buffer_view_2d->size_bytes   = view->size;
+          buffer_view_2d->stride_bytes = view->stride;
+        } else if (buffer_view_3d) {
+          buffer_view_3d->buffer       = buffer;
+          buffer_view_3d->offset_bytes = offset;
+          buffer_view_3d->size_bytes   = view->size;
+          buffer_view_3d->stride_bytes = view->stride;
+        } else if (buffer_view_4d) {
+          buffer_view_4d->buffer       = buffer;
+          buffer_view_4d->offset_bytes = offset;
+          buffer_view_4d->size_bytes   = view->size;
+          buffer_view_4d->stride_bytes = view->stride;
+        }
+      } // Vertex attributes.
+
+      // If the mesh primitive has no tangents, see if they were computed
+      // separately.
+      if (!geometry_desc.tangents.buffer) {
+        for (cgltf_size t = 0; t < num_tangent_buffers; ++t) {
+          const cgltfTangentBuffer* cgltf_buffer = &cgltf_tangent_buffers[t];
+
+          if (cgltf_buffer->primitive == prim) {
+            BufferView4d* view = &geometry_desc.tangents;
+            view->buffer       = tangent_buffers[t];
+            view->offset_bytes = 0;
+            view->size_bytes   = cgltf_buffer->size_bytes;
+            view->stride_bytes = 0; // Tightly packed.
+            break;
+          }
+        }
+      }
+
+      // Set the number of vertices in the geometry. Since a geometry can have
+      // either 2d or 3d positions but not both, here we can perform addition to
+      // compute the total number of vertices.
+      geometry_desc.num_verts =
+          (geometry_desc.positions2d.size_bytes / sizeof(vec2)) +
+          (geometry_desc.positions3d.size_bytes / sizeof(vec3));
+
+      // Check that the number of vertices is consistent across all vertex
+      // attributes.
+      if (geometry_desc.normals.buffer) {
+        assert(
+            (geometry_desc.normals.size_bytes / sizeof(vec3)) ==
+            geometry_desc.num_verts);
+      }
+      if (geometry_desc.tangents.buffer) {
+        assert(
+            (geometry_desc.tangents.size_bytes / sizeof(vec4)) ==
+            geometry_desc.num_verts);
+      }
+      if (geometry_desc.texcoords.buffer) {
+        assert(
+            (geometry_desc.texcoords.size_bytes / sizeof(vec2)) ==
+            geometry_desc.num_verts);
+      }
+
+      (*geometries)[next_mesh] =
+          gfx_make_geometry(render_backend, &geometry_desc);
+
+      const cgltf_size material_index = prim->material - data->materials;
+      assert(material_index < data->materials_count);
+      const Material* material = materials[material_index];
+
+      configure_material_permutation(perm, prim->material);
+
+      (*meshes)[next_mesh] = gfx_make_mesh(&(MeshDesc){
+          .geometry = (*geometries)[next_mesh], .material = material});
+
+      gfx_add_object_mesh(objects[m], (*meshes)[next_mesh]);
+
+      ++next_mesh;
+    } // glTF mesh primitive / gfx Mesh.
+  }   // glTF mesh / gfx SceneObject.
+
+  *num_geometries    = primitive_count;
+  *num_meshes        = primitive_count;
+  *num_scene_objects = data->meshes_count;
+  return objects;
+
+cleanup:
+  // Destroy resources, free pointers arrays.
+  if (*geometries) {
+    for (size_t i = 0; i < primitive_count; ++i) {
+      if ((*geometries)[i]) {
+        gfx_destroy_geometry(render_backend, &(*geometries[i]));
+      }
+    }
+    free(*geometries);
+    *geometries = 0;
+  }
+  if (*meshes) {
+    for (size_t i = 0; i < primitive_count; ++i) {
+      if ((*meshes[i])) {
+        gfx_destroy_mesh(&(*meshes)[i]);
+      }
+    }
+    free(*meshes);
+    *meshes = 0;
+  }
+  if (*mesh_permutations) {
+    free(*mesh_permutations);
+    mesh_permutations = 0;
+  }
+  if (objects) {
+    for (cgltf_size i = 0; i < data->meshes_count; ++i) {
+      if (objects[i]) {
+        gfx_destroy_object(&objects[i]);
+      }
+    }
+    free(objects);
+    objects = 0;
+  }
+  *num_geometries    = 0;
+  *num_meshes        = 0;
+  *num_scene_objects = 0;
+  return 0;
+}
+
+/// Load all nodes from the glTF scene.
+///
+/// This function ignores the many scenes and default scene of the glTF spec
+/// and instead just loads all nodes into a single gfx Scene.
+static SceneNode** load_nodes(
+    const cgltf_data* data, Gfx* gfx, SceneNode* root_node,
+    SceneObject** scene_objects, SceneCamera*** cameras,
+    cgltf_size* num_cameras, cgltf_size* num_nodes) {
+  // Note that with glTF 2.0, nodes do not form a DAG / scene graph but a
+  // disjount union of strict trees:
+  //
+  // "For Version 2.0 conformance, the glTF node hierarchy is not a directed
+  // acyclic graph (DAG) or scene graph, but a disjoint union of strict trees.
+  // That is, no node may be a direct descendant of more than one node. This
+  // restriction is meant to simplify implementation and facilitate
+  // conformance."
+  //
+  // This matches the gfx library implementation, where every node can have at
+  // most one parent.
+  assert(data);
+  // TODO: gfx not needed?
+  assert(gfx);
+  assert(root_node);
+  assert(scene_objects);
+  assert(cameras);
+  assert(num_cameras);
+  assert(num_nodes);
+
+  SceneNode** nodes = calloc(data->nodes_count, sizeof(SceneNode**));
+  if (!nodes) {
+    goto cleanup;
+  }
+  *cameras = calloc(data->cameras_count, sizeof(SceneCamera**));
+  if (!*cameras) {
+    goto cleanup;
+  }
+
+  cgltf_size next_camera = 0;
+
+  // First pass: create all nodes with no hierarchy just yet. We cannot build
+  // the hierarchy if we do not have a node pointer to connect.
+  for (cgltf_size n = 0; n < data->nodes_count; ++n) {
+    const cgltf_node* node = &data->nodes[n];
+
+    // Add SceneObject, SceneCamera or Lights.
+    // TODO: Handle lights once they are implemented in the gfx library.
+    if (node->mesh) {
+      const cgltf_size mesh_index = node->mesh - data->meshes;
+      assert(mesh_index < data->meshes_count);
+      nodes[n] = gfx_make_object_node(scene_objects[mesh_index]);
+    } else if (node->camera) {
+      assert(next_camera < data->cameras_count);
+
+      Camera              camera;
+      const cgltf_camera* cam = node->camera;
+
+      // TODO: We could define a function load_cameras() the same way we load
+      // every mesh and then remove this ad-hoc loading of cameras here, as well
+      // as remove 'next_camera'.
+      switch (cam->type) {
+      case cgltf_camera_type_orthographic:
+        camera = camera_orthographic(
+            0, cam->data.orthographic.xmag, 0, cam->data.orthographic.ymag,
+            cam->data.orthographic.znear, cam->data.orthographic.zfar);
+        break;
+      case cgltf_camera_type_perspective:
+        camera = camera_perspective(
+            cam->data.perspective.yfov, cam->data.perspective.aspect_ratio,
+            cam->data.perspective.znear, cam->data.perspective.zfar);
+        break;
+      case cgltf_camera_type_invalid:
+        break;
+      }
+
+      gfx_set_camera_camera((*cameras)[next_camera], &camera);
+      nodes[n] = gfx_make_camera_node((*cameras)[next_camera]);
+      ++next_camera;
+    } else {
+      continue; // TODO: implementation for missing node types.
+    }
+    assert(nodes[n]);
+
+    // Set transform.
+    mat4 transform;
+    if (node->has_matrix) {
+      transform = mat4_from_array(node->matrix);
+    } else {
+      transform = mat4_id();
+      if (node->has_scale) {
+        const mat4 scale = mat4_scale(vec3_from_array(node->scale));
+        transform        = mat4_mul(transform, scale);
+      }
+      if (node->has_rotation) {
+        const quat q      = quat_from_array(node->rotation);
+        const mat4 rotate = mat4_from_quat(q);
+        transform         = mat4_mul(transform, rotate);
+      }
+      if (node->has_translation) {
+        const mat4 translate =
+            mat4_translate(vec3_from_array(node->translation));
+        transform = mat4_mul(translate, transform);
+      }
+    }
+    gfx_set_node_transform(nodes[n], &transform);
+
+    // By default, set nodes as children of the root node. The second pass will
+    // properly set the parent of the relevant nodes, and leave the root node
+    // as the parent for top-level nodes.
+    gfx_set_node_parent(nodes[n], root_node);
+  } // SceneNode.
+
+  // Second pass: wire nodes together to build the hierarchy.
+  for (cgltf_size n = 0; n < data->nodes_count; ++n) {
+    const cgltf_node* parent            = &data->nodes[n];
+    SceneNode*        parent_scene_node = nodes[n];
+
+    for (cgltf_size c = 0; c < parent->children_count; ++c) {
+      const cgltf_size child_index = parent->children[c] - data->nodes;
+      assert(child_index < data->nodes_count);
+      SceneNode* child_scene_node = nodes[child_index];
+
+      gfx_set_node_parent(child_scene_node, parent_scene_node);
+    }
+  }
+
+  *num_cameras = data->cameras_count;
+  *num_nodes   = data->nodes_count;
+  return nodes;
+
+cleanup:
+  // Destroy resources, free pointers arrays.
+  if (nodes) {
+    for (cgltf_size i = 0; i < data->nodes_count; ++i) {
+      if (nodes[i]) {
+        gfx_destroy_node(&nodes[i]);
+      }
+    }
+    free(nodes);
+  }
+  if (cameras) {
+    for (cgltf_size i = 0; i < data->cameras_count; ++i) {
+      if (cameras[i]) {
+        gfx_destroy_camera(&(*cameras)[i]);
+      }
+    }
+    free(cameras);
+  }
+  *num_cameras = 0;
+  *num_nodes   = 0;
+  return 0;
+}
+
+/// Load all scenes from the glTF file into the given gfx Scene.
+///
+/// If the scene is loaded from memory, set filepath = null.
+///
+/// This function ignores the many scenes and default scene of the glTF spec
+/// and instead just loads all scenes into a single gfx Scene.
+static bool load_scene(
+    cgltf_data* data, Gfx* gfx, SceneNode* root_node, const char* filepath,
+    ShaderProgram* shader, const cgltfTangentBuffer* cgltf_tangent_buffers,
+    cgltf_size num_tangent_buffers) {
+  /// In a GLTF scene, buffers can be shared among meshes, meshes among nodes,
+  /// etc. Each object is referenced by its index in the relevant array. Here we
+  /// do a button-up construction, first allocating our own graphics objects in
+  /// the same quantities and then re-using the GLTF indices to index these
+  /// arrays.
+  assert(data);
+  assert(gfx);
+  assert(root_node);
+
+  RenderBackend* render_backend = gfx_get_render_backend(gfx);
+
+  const mstring directory = mstring_dirname(mstring_make(filepath));
+  LOGD("Filepath: %s", filepath);
+  LOGD("Directory: %s", mstring_cstring(&directory));
+
+  Buffer**         buffers           = 0;
+  Buffer**         tangent_buffers   = 0;
+  Geometry**       geometries        = 0;
+  Material**       materials         = 0;
+  Mesh**           meshes            = 0;
+  SceneObject**    scene_objects     = 0;
+  SceneCamera**    scene_cameras     = 0;
+  SceneNode**      scene_nodes       = 0;
+  Texture**        textures          = 0;
+  LoadTextureCmd*  load_texture_cmds = 0;
+  MeshPermutation* mesh_permutations = 0;
+  cgltf_size       num_buffers       = 0;
+  cgltf_size       num_geometries    = 0;
+  cgltf_size       num_materials     = 0;
+  cgltf_size       num_meshes        = 0;
+  cgltf_size       num_scene_objects = 0;
+  cgltf_size       num_scene_cameras = 0;
+  cgltf_size       num_scene_nodes   = 0;
+  cgltf_size       num_textures      = 0;
+
+  buffers = load_buffers(data, render_backend, &num_buffers);
+  if (!buffers) {
+    goto cleanup;
+  }
+
+  if (num_tangent_buffers > 0) {
+    tangent_buffers = load_tangent_buffers(
+        cgltf_tangent_buffers, num_tangent_buffers, render_backend);
+    if (!tangent_buffers) {
+      goto cleanup;
+    }
+  }
+
+  textures = load_textures(
+      data, render_backend, mstring_cstring(&directory), &load_texture_cmds,
+      &num_textures);
+  if (!textures || !load_texture_cmds) {
+    goto cleanup;
+  }
+
+  materials = load_materials(
+      data, render_backend, shader, textures, load_texture_cmds,
+      &num_materials);
+  if (!materials) {
+    goto cleanup;
+  }
+
+  scene_objects = load_meshes(
+      data, gfx, buffers, tangent_buffers, materials, cgltf_tangent_buffers,
+      num_tangent_buffers, &geometries, &meshes, &mesh_permutations,
+      &num_geometries, &num_meshes, &num_scene_objects);
+  if (!scene_objects) {
+    goto cleanup;
+  }
+
+  scene_nodes = load_nodes(
+      data, gfx, root_node, scene_objects, &scene_cameras, &num_scene_cameras,
+      &num_scene_nodes);
+  if (!scene_nodes) {
+    goto cleanup;
+  }
+
+  return true;
+
+cleanup:
+  if (buffers) {
+    for (cgltf_size i = 0; i < num_buffers; ++i) {
+      gfx_destroy_buffer(render_backend, &buffers[i]);
+    }
+    free(buffers);
+  }
+  if (tangent_buffers) {
+    for (cgltf_size i = 0; i < num_tangent_buffers; ++i) {
+      gfx_destroy_buffer(render_backend, &tangent_buffers[i]);
+    }
+    free(tangent_buffers);
+  }
+  if (textures) {
+    for (cgltf_size i = 0; i < num_textures; ++i) {
+      gfx_destroy_texture(render_backend, &textures[i]);
+    }
+    free(textures);
+  }
+  if (materials) {
+    for (cgltf_size i = 0; i < num_materials; ++i) {
+      gfx_destroy_material(&materials[i]);
+    }
+    free(materials);
+  }
+  if (geometries) {
+    for (cgltf_size i = 0; i < num_geometries; ++i) {
+      gfx_destroy_geometry(render_backend, &geometries[i]);
+    }
+    free(geometries);
+  }
+  if (meshes) {
+    for (cgltf_size i = 0; i < num_meshes; ++i) {
+      gfx_destroy_mesh(&meshes[i]);
+    }
+    free(meshes);
+  }
+  if (scene_objects) {
+    for (cgltf_size i = 0; i < num_scene_objects; ++i) {
+      gfx_destroy_object(&scene_objects[i]);
+    }
+    free(scene_objects);
+  }
+  if (scene_cameras) {
+    for (cgltf_size i = 0; i < num_scene_cameras; ++i) {
+      gfx_destroy_camera(&scene_cameras[i]);
+    }
+    free(scene_cameras);
+  }
+  if (scene_nodes) {
+    for (cgltf_size i = 0; i < num_scene_nodes; ++i) {
+      gfx_destroy_node(&scene_nodes[i]);
+    }
+    free(scene_nodes);
+  }
+  if (load_texture_cmds) {
+    free(load_texture_cmds);
+  }
+  if (mesh_permutations) {
+    free(mesh_permutations);
+  }
+  return false;
+}
+
+bool gfx_load_scene(
+    Gfx* gfx, SceneNode* root_node, ShaderProgram* shader,
+    const LoadSceneCmd* cmd) {
+  assert(gfx);
+  assert(root_node);
+  assert(shader);
+  assert(cmd);
+
+  bool success = false;
+
+  cgltf_options       options         = {0};
+  cgltf_data*         data            = NULL;
+  cgltfTangentBuffer* tangent_buffers = 0;
+
+  cgltf_result result;
+  switch (cmd->origin) {
+  case SceneFromFile:
+    result = cgltf_parse_file(&options, cmd->filepath, &data);
+    break;
+  case SceneFromMemory:
+    result = cgltf_parse(&options, cmd->data, cmd->size_bytes, &data);
+    break;
+  }
+  if (result != cgltf_result_success) {
+    goto cleanup;
+  }
+
+  if (cmd->origin == SceneFromFile) {
+    // Must call cgltf_load_buffers() to load buffer data.
+    result = cgltf_load_buffers(&options, data, cmd->filepath);
+    if (result != cgltf_result_success) {
+      goto cleanup;
+    }
+  }
+
+  // Compute tangents for normal-mapped models that are missing them.
+  cgltf_size num_tangent_buffers = 0;
+  cgltf_compute_tangents(
+      &options, data, &tangent_buffers, &num_tangent_buffers);
+
+  success = load_scene(
+      data, gfx, root_node, cmd->filepath, shader, tangent_buffers,
+      num_tangent_buffers);
+
+cleanup:
+  if (data) {
+    cgltf_free(data);
+  }
+  if (tangent_buffers) {
+    free(tangent_buffers);
+  }
+  return success;
+}
diff --git a/gfx/src/util/shader.c b/gfx/src/util/shader.c
new file mode 100644
index 0000000..a07c66e
--- /dev/null
+++ b/gfx/src/util/shader.c
@@ -0,0 +1,115 @@
+#include <gfx/util/shader.h>
+
+#include <gfx/render_backend.h>
+#include <shaders/brdf_integration_map.frag.h>
+#include <shaders/cook_torrance.frag.h>
+#include <shaders/cook_torrance.vert.h>
+#include <shaders/cubemap_filtering.vert.h>
+#include <shaders/debug3d.frag.h>
+#include <shaders/debug3d.vert.h>
+#include <shaders/irradiance_map.frag.h>
+#include <shaders/prefiltered_environment_map.frag.h>
+#include <shaders/quad.vert.h>
+#include <shaders/skyquad.frag.h>
+#include <shaders/skyquad.vert.h>
+#include <shaders/view_normal_mapped_normals.frag.h>
+#include <shaders/view_normal_mapped_normals.vert.h>
+#include <shaders/view_normals.frag.h>
+#include <shaders/view_normals.vert.h>
+#include <shaders/view_tangents.frag.h>
+#include <shaders/view_tangents.vert.h>
+#include <shaders/view_texture.frag.h>
+#include <shaders/view_texture.vert.h>
+
+#include <assert.h>
+
+static ShaderProgram* make_shader_program(RenderBackend* render_backend,
+                                          const char* vert_source,
+                                          const char* frag_source) {
+  assert(render_backend);
+  assert(vert_source);
+  assert(frag_source);
+
+  Shader* vert = 0;
+  Shader* frag = 0;
+
+  ShaderDesc vertex_shader_desc = {.code = vert_source, .type = VertexShader};
+  ShaderDesc fragment_shader_desc = {.code = frag_source,
+                                     .type = FragmentShader};
+  vert = gfx_make_shader(render_backend, &vertex_shader_desc);
+  if (!vert) {
+    goto cleanup;
+  }
+  frag = gfx_make_shader(render_backend, &fragment_shader_desc);
+  if (!frag) {
+    goto cleanup;
+  }
+  ShaderProgramDesc shader_program_desc = {.vertex_shader = vert,
+                                           .fragment_shader = frag};
+  ShaderProgram* prog =
+      gfx_make_shader_program(render_backend, &shader_program_desc);
+  if (!prog) {
+    goto cleanup;
+  }
+  return prog;
+
+cleanup:
+  if (vert) {
+    gfx_destroy_shader(render_backend, &vert);
+  }
+  if (frag) {
+    gfx_destroy_shader(render_backend, &frag);
+  }
+  return 0;
+}
+
+ShaderProgram*
+gfx_make_brdf_integration_map_shader(RenderBackend* render_backend) {
+  return make_shader_program(render_backend, quad_vert,
+                             brdf_integration_map_frag);
+}
+
+ShaderProgram* gfx_make_cook_torrance_shader(RenderBackend* render_backend) {
+  return make_shader_program(render_backend, cook_torrance_vert,
+                             cook_torrance_frag);
+}
+
+ShaderProgram* gfx_make_irradiance_map_shader(RenderBackend* render_backend) {
+  return make_shader_program(render_backend, cubemap_filtering_vert,
+                             irradiance_map_frag);
+}
+
+ShaderProgram*
+gfx_make_prefiltered_environment_map_shader(RenderBackend* render_backend) {
+  return make_shader_program(render_backend, cubemap_filtering_vert,
+                             prefiltered_environment_map_frag);
+}
+
+ShaderProgram* gfx_make_debug3d_shader(RenderBackend* render_backend) {
+  return make_shader_program(render_backend, debug3d_vert, debug3d_frag);
+}
+
+ShaderProgram* gfx_make_skyquad_shader(RenderBackend* render_backend) {
+  return make_shader_program(render_backend, skyquad_vert, skyquad_frag);
+}
+
+ShaderProgram*
+gfx_make_view_normal_mapped_normals_shader(RenderBackend* render_backend) {
+  return make_shader_program(render_backend, view_normal_mapped_normals_vert,
+                             view_normal_mapped_normals_frag);
+}
+
+ShaderProgram* gfx_make_view_normals_shader(RenderBackend* render_backend) {
+  return make_shader_program(render_backend, view_normals_vert,
+                             view_normals_frag);
+}
+
+ShaderProgram* gfx_make_view_tangents_shader(RenderBackend* render_backend) {
+  return make_shader_program(render_backend, view_tangents_vert,
+                             view_tangents_frag);
+}
+
+ShaderProgram* gfx_make_view_texture_shader(RenderBackend* render_backend) {
+  return make_shader_program(render_backend, view_texture_vert,
+                             view_texture_frag);
+}
diff --git a/gfx/src/util/skyquad.c b/gfx/src/util/skyquad.c
new file mode 100644
index 0000000..51c250b
--- /dev/null
+++ b/gfx/src/util/skyquad.c
@@ -0,0 +1,85 @@
+#include <gfx/util/skyquad.h>
+
+#include <gfx/gfx.h>
+#include <gfx/render_backend.h>
+#include <gfx/scene/material.h>
+#include <gfx/scene/mesh.h>
+#include <gfx/scene/object.h>
+#include <gfx/scene/scene.h>
+#include <gfx/util/geometry.h>
+#include <gfx/util/shader.h>
+
+#include <math/vec4.h>
+
+#include <assert.h>
+
+SceneObject* gfx_make_skyquad(Gfx* gfx, Scene* scene, const Texture* texture) {
+  assert(gfx);
+  assert(scene);
+  assert(texture);
+
+  // TODO: pass RenderBackend directly?
+  RenderBackend* render_backend = gfx_get_render_backend(gfx);
+  assert(render_backend);
+
+  ShaderProgram* shader = 0;
+  Geometry* geometry = 0;
+  Material* material = 0;
+  Mesh* mesh = 0;
+  SceneObject* object = 0;
+
+  shader = gfx_make_skyquad_shader(render_backend);
+  if (!shader) {
+    goto cleanup;
+  }
+
+  geometry = gfx_make_quad_11(render_backend);
+  if (!geometry) {
+    goto cleanup;
+  }
+
+  MaterialDesc material_desc = (MaterialDesc){0};
+  material_desc.shader = shader;
+  material_desc.uniforms[0] = (ShaderUniform){.type = UniformTexture,
+                                              .value.texture = texture,
+                                              .name = sstring_make("Skyquad")};
+  material_desc.num_uniforms = 1;
+  material = gfx_make_material(&material_desc);
+  if (!material) {
+    goto cleanup;
+  }
+
+  MeshDesc mesh_desc = (MeshDesc){0};
+  mesh_desc.geometry = geometry;
+  mesh_desc.material = material;
+  mesh = gfx_make_mesh(&mesh_desc);
+  if (!mesh) {
+    goto cleanup;
+  }
+
+  object = gfx_make_object();
+  if (!object) {
+    goto cleanup;
+  }
+  gfx_add_object_mesh(object, mesh);
+
+  return object;
+
+cleanup:
+  if (shader) {
+    gfx_destroy_shader_program(render_backend, &shader);
+  }
+  if (geometry) {
+    gfx_destroy_geometry(render_backend, &geometry);
+  }
+  if (material) {
+    gfx_destroy_material(&material);
+  }
+  if (mesh) {
+    gfx_destroy_mesh(&mesh);
+  }
+  if (object) {
+    gfx_destroy_object(&object);
+  }
+  return false;
+}
diff --git a/gfx/src/util/texture.c b/gfx/src/util/texture.c
new file mode 100644
index 0000000..dae5bd2
--- /dev/null
+++ b/gfx/src/util/texture.c
@@ -0,0 +1,136 @@
+#include <gfx/util/texture.h>
+
+#include <gfx/error.h>
+#include <gfx/render_backend.h>
+
+#define STB_IMAGE_IMPLEMENTATION
+#include <stb_image.h>
+
+Texture* gfx_load_texture(RenderBackend* render_backend,
+                          const LoadTextureCmd* cmd) {
+  assert(render_backend);
+  assert(cmd);
+  assert(cmd->origin == TextureFromFile || cmd->origin == TextureFromMemory);
+  assert(cmd->type == LoadTexture || cmd->type == LoadCubemap);
+
+  int width, height, components, old_components;
+  unsigned char* pixels[6] = {0};
+
+  switch (cmd->origin) {
+  case TextureFromFile:
+    switch (cmd->type) {
+    case LoadTexture: {
+      const char* filepath = mstring_cstring(&cmd->data.texture.filepath);
+      pixels[0] = stbi_load(filepath, &width, &height, &components, 0);
+      if (!pixels[0]) {
+        gfx_set_error("Failed to load texture file: %s", filepath);
+      }
+      break;
+    }
+    case LoadCubemap:
+      for (int i = 0; i < 6; ++i) {
+        const char* filepath =
+            mstring_cstring(&cmd->data.cubemap.filepaths.filepath_pos_x + i);
+        stbi_uc* image_pixels =
+            stbi_load(filepath, &width, &height, &components, 0);
+        if (!image_pixels) {
+          gfx_set_error("Failed to load texture file: %s", filepath);
+          break;
+        }
+        if (i > 0 && components != old_components) {
+          gfx_set_error(
+              "All textures in a cubemap must have the same number of "
+              "components");
+          break;
+        }
+        pixels[i] = image_pixels;
+        old_components = components;
+      }
+      break;
+    }
+    break;
+  case TextureFromMemory:
+    // TODO: Load textures from memory.
+    gfx_set_error("Loading textures from memory is not yet implemented");
+    return 0;
+  }
+
+  // Error out if we failed to load a texture.
+  if (!pixels[0] ||
+      (cmd->type == LoadCubemap &&
+       (!pixels[1] || !pixels[2] || !pixels[3] || !pixels[4] || !pixels[5]))) {
+    for (int i = 0; i < 6; ++i) {
+      if (pixels[i]) {
+        stbi_image_free(pixels[i]);
+      }
+    }
+    return 0;
+  }
+
+  TextureDesc desc = (TextureDesc){0};
+  desc.width = width;
+  desc.height = height;
+
+  switch (cmd->type) {
+  case LoadTexture:
+    desc.dimension = Texture2D;
+    break;
+  case LoadCubemap:
+    desc.dimension = TextureCubeMap;
+    break;
+  }
+
+  switch (components) {
+  case 3:
+    switch (cmd->colour_space) {
+    case LinearColourSpace:
+      desc.format = TextureRGB8;
+      break;
+    case sRGB:
+      desc.format = TextureSRGB8;
+      break;
+    default:
+      gfx_set_error("Unsupported texture colour space: %d", cmd->colour_space);
+      return 0;
+    }
+    break;
+  case 4:
+    switch (cmd->colour_space) {
+    case LinearColourSpace:
+      desc.format = TextureRGBA8;
+      break;
+    case sRGB:
+      desc.format = TextureSRGBA8;
+      break;
+    default:
+      gfx_set_error("Unsupported texture colour space: %d", cmd->colour_space);
+      return 0;
+    }
+    break;
+  default:
+    gfx_set_error("Unsupported number of texture components: %d", components);
+    return 0;
+  }
+
+  desc.filtering = cmd->filtering;
+  desc.mipmaps = cmd->mipmaps;
+
+  switch (cmd->type) {
+  case LoadTexture:
+    desc.pixels = pixels[0];
+    break;
+  case LoadCubemap:
+    for (int i = 0; i < 6; ++i) {
+      *(&desc.cubemap.pixels_pos_x + i) = pixels[i];
+    }
+    break;
+  }
+
+  Texture* texture = gfx_make_texture(render_backend, &desc);
+  for (int i = 0; i < 6; ++i) {
+    if (pixels[i]) {
+      stbi_image_free(pixels[i]);
+    }
+  }
+  return texture;
+}
diff --git a/gltfview/CMakeLists.txt b/gltfview/CMakeLists.txt
new file mode 100644
index 0000000..19ea0e5
--- /dev/null
+++ b/gltfview/CMakeLists.txt
@@ -0,0 +1,17 @@
+cmake_minimum_required(VERSION 3.0)
+
+project(gltfview)
+
+add_executable(gltfview
+  src/game.c
+  src/main.c)
+
+target_include_directories(gltfview PRIVATE
+  src/)
+
+target_link_libraries(gltfview PRIVATE
+  gfx
+  gfx-app
+  log
+  math
+  mempool)
diff --git a/gltfview/src/game.c b/gltfview/src/game.c
new file mode 100644
index 0000000..d7352d4
--- /dev/null
+++ b/gltfview/src/game.c
@@ -0,0 +1,295 @@
+#include "game.h"
+
+#include <gfx/error.h>
+#include <gfx/render_backend.h>
+#include <gfx/scene/light.h>
+#include <gfx/scene/material.h>
+#include <gfx/scene/mesh.h>
+#include <gfx/scene/node.h>
+#include <gfx/scene/object.h>
+#include <gfx/util/geometry.h>
+#include <gfx/util/ibl.h>
+#include <gfx/util/scene.h>
+#include <gfx/util/shader.h>
+#include <gfx/util/skyquad.h>
+#include <gfx/util/texture.h>
+
+#include <log/log.h>
+#include <math/camera.h>
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h> // usleep; TODO Remove.
+
+// Paths to various scene files.
+static const char* BOX = "/assets/models/box.gltf";
+static const char* SUZANNE = "/assets/models/suzanne.gltf";
+static const char* SPONZA =
+    "/assets/glTF-Sample-Models/2.0/Sponza/glTF/Sponza.gltf";
+static const char* FLIGHT_HELMET =
+    "/assets/glTF-Sample-Models/2.0/FlightHelmet/glTF/FlightHelmet.gltf";
+static const char* DAMAGED_HELMET =
+    "/assets/glTF-Sample-Models/2.0/DamagedHelmet/glTF/DamagedHelmet.gltf";
+
+#define DEFAULT_SCENE_FILE DAMAGED_HELMET
+
+static const char* CLOUDS1_TEXTURE = "/assets/skybox/clouds1/clouds1_west.bmp";
+
+static ShaderProgram* load_shader(RenderBackend* render_backend,
+                                  const char* view_mode) {
+  ShaderProgram* shader = 0;
+  if (strcmp(view_mode, "debug") == 0) {
+    shader = gfx_make_debug3d_shader(render_backend);
+  } else if (strcmp(view_mode, "normals") == 0) {
+    shader = gfx_make_view_normals_shader(render_backend);
+  } else if (strcmp(view_mode, "normal_mapped_normals") == 0) {
+    shader = gfx_make_view_normal_mapped_normals_shader(render_backend);
+  } else if (strcmp(view_mode, "tangents") == 0) {
+    shader = gfx_make_view_tangents_shader(render_backend);
+  } else {
+    shader = gfx_make_cook_torrance_shader(render_backend);
+  }
+  return shader;
+}
+
+/// Loads the skyquad texture.
+static Texture* load_environment_map(RenderBackend* render_backend) {
+  return gfx_load_texture(
+      render_backend,
+      &(LoadTextureCmd){
+          .origin = TextureFromFile,
+          .type = LoadCubemap,
+          .colour_space = sRGB,
+          .filtering = NearestFiltering,
+          .mipmaps = false,
+          .data.cubemap.filepaths = {
+              mstring_make("/assets/skybox/clouds1/clouds1_east.bmp"),
+              mstring_make("/assets/skybox/clouds1/clouds1_west.bmp"),
+              mstring_make("/assets/skybox/clouds1/clouds1_up.bmp"),
+              mstring_make("/assets/skybox/clouds1/clouds1_down.bmp"),
+              mstring_make("/assets/skybox/clouds1/clouds1_north.bmp"),
+              mstring_make("/assets/skybox/clouds1/clouds1_south.bmp")}});
+}
+
+/// Creates an object to render the skyquad in the background.
+static SceneNode* make_skyquad_object_node(Game* game,
+                                           const Texture* environment_map) {
+  assert(game);
+
+  SceneObject* skyquad_object =
+      gfx_make_skyquad(game->gfx, game->scene, environment_map);
+  if (!skyquad_object) {
+    return 0;
+  }
+  SceneNode* skyquad_node = gfx_make_object_node(skyquad_object);
+  if (!skyquad_node) {
+    return 0;
+  }
+  gfx_set_node_parent(skyquad_node, gfx_get_scene_root(game->scene));
+  return skyquad_node;
+}
+
+/// Creates an environment light.
+static SceneNode* make_environment_light(Game* game,
+                                         const Texture* environment_light) {
+  assert(game);
+
+  Light* light = gfx_make_light(&(LightDesc){
+      .type = EnvironmentLightType,
+      .light = (EnvironmentLightDesc){.environment_map = environment_light}});
+  if (!light) {
+    return 0;
+  }
+  SceneNode* light_node = gfx_make_light_node(light);
+  if (!light_node) {
+    return 0;
+  }
+  gfx_set_node_parent(light_node, gfx_get_scene_root(game->scene));
+  return light_node;
+}
+
+/// Loads the skyquad and returns the SceneNode with the environment light.
+static bool load_skyquad(Game* game, SceneNode** node) {
+  assert(game);
+  assert(node);
+
+  Texture* environment_map = load_environment_map(game->render_backend);
+  if (!environment_map) {
+    return false;
+  }
+
+  make_skyquad_object_node(game, environment_map);
+  *node = make_environment_light(game, environment_map);
+
+  return true;
+}
+
+/// Loads the 3D scene.
+static bool load_scene(Game* game, const char* scene_filepath,
+                       const char* view_mode) {
+  assert(game);
+
+  game->camera = gfx_make_camera();
+  if (!game->camera) {
+    return false;
+  }
+  Camera* camera = gfx_get_camera_camera(game->camera);
+  // Sponza.
+  // spatial3_set_position(&camera->spatial, vec3_make(0, 100, 50));
+  // Damaged helmet.
+  spatial3_set_position(&camera->spatial, vec3_make(0, 0, 2));
+
+  SceneNode* sky_node = 0;
+  if (!load_skyquad(game, &sky_node) || !sky_node) {
+    return false;
+  }
+
+  ShaderProgram* shader = load_shader(game->render_backend, view_mode);
+  if (!shader) {
+    return false;
+  }
+
+  if (!gfx_load_scene(game->gfx, sky_node, shader,
+                      &(LoadSceneCmd){.origin = SceneFromFile,
+                                      .filepath = scene_filepath})) {
+    return false;
+  }
+
+  return true;
+}
+
+/// Loads a scene for debugging textures.
+static bool load_texture_debugger_scene(Game* game) {
+  assert(game);
+
+  Texture* texture =
+      gfx_load_texture(game->render_backend,
+                       &(LoadTextureCmd){.origin = TextureFromFile,
+                                         .type = LoadTexture,
+                                         .filtering = LinearFiltering,
+                                         .mipmaps = false,
+                                         .data.texture.filepath =
+                                             mstring_make(CLOUDS1_TEXTURE)});
+
+  game->camera = gfx_make_camera();
+  if (!game->camera) {
+    return false;
+  }
+  Camera* camera = gfx_get_camera_camera(game->camera);
+  spatial3_set_position(&camera->spatial, vec3_make(0, 0, 1));
+
+  ShaderProgram* shader = gfx_make_view_texture_shader(game->render_backend);
+  if (!shader) {
+    return false;
+  }
+
+  Geometry* geometry = gfx_make_quad_11(game->render_backend);
+  if (!geometry) {
+    return false;
+  }
+
+  MaterialDesc material_desc = (MaterialDesc){0};
+  material_desc.shader = shader;
+  material_desc.uniforms[0] = (ShaderUniform){.type = UniformTexture,
+                                              .value.texture = texture,
+                                              .name = sstring_make("Texture")};
+  material_desc.num_uniforms = 1;
+  Material* material = gfx_make_material(&material_desc);
+  if (!material) {
+    return false;
+  }
+
+  MeshDesc mesh_desc = (MeshDesc){0};
+  mesh_desc.geometry = geometry;
+  mesh_desc.material = material;
+  Mesh* mesh = gfx_make_mesh(&mesh_desc);
+  if (!mesh) {
+    return false;
+  }
+
+  SceneObject* object = gfx_make_object();
+  if (!object) {
+    return false;
+  }
+  gfx_add_object_mesh(object, mesh);
+
+  SceneNode* node = gfx_make_object_node(object);
+  SceneNode* root = gfx_get_scene_root(game->scene);
+  gfx_set_node_parent(node, root);
+
+  return true;
+}
+
+bool game_new(Game* game, int argc, const char** argv) {
+  // TODO: getopt() to implement proper argument parsing.
+  const char* view_mode = argc > 1 ? argv[1] : "";
+  const char* scene_filepath = argc > 2 ? argv[2] : DEFAULT_SCENE_FILE;
+
+  game->gfx = gfx_init();
+  if (!game->gfx) {
+    goto cleanup;
+  }
+
+  game->render_backend = gfx_get_render_backend(game->gfx);
+  game->renderer = gfx_get_renderer(game->gfx);
+
+  game->scene = gfx_make_scene(game->gfx);
+  if (!game->scene) {
+    goto cleanup;
+  }
+
+  if (!load_scene(game, scene_filepath, view_mode)) {
+    goto cleanup;
+  }
+  /*if (!load_texture_debugger_scene(game)) {
+    goto cleanup;
+  }*/
+
+  return true;
+
+cleanup:
+  LOGE("Gfx error: %s", gfx_get_error());
+  if (game->scene) {
+    gfx_destroy_scene(game->gfx, &game->scene);
+  }
+  if (game->gfx) {
+    gfx_destroy(&game->gfx);
+  }
+  return false;
+}
+
+void game_end(Game* game) { gfx_destroy(&game->gfx); }
+
+void game_update(Game* game, double t, double dt) {
+  game->elapsed += dt;
+  while (game->elapsed >= 1.0) {
+    // LOGD("Tick");
+    usleep(1000);
+    game->elapsed -= 1.0;
+  }
+  Camera* camera = gfx_get_camera_camera(game->camera);
+  spatial3_orbit(&camera->spatial, vec3_make(0, 0, 0),
+                 /*radius=*/2,
+                 /*azimuth=*/t * 0.5, /*zenith=*/0);
+  spatial3_lookat(&camera->spatial, vec3_make(0, 0, 0));
+}
+
+void game_render(const Game* game) {
+  gfx_render_scene(game->renderer, game->render_backend, game->scene,
+                   game->camera);
+}
+
+void game_set_viewport(Game* game, int width, int height) {
+  gfx_set_viewport(game->render_backend, width, height);
+
+  const R fovy = 90 * TO_RAD;
+  const R aspect = (R)width / (R)height;
+  const R near = 0.1;
+  const R far = 1000;
+  const mat4 projection = mat4_perspective(fovy, aspect, near, far);
+
+  Camera* camera = gfx_get_camera_camera(game->camera);
+  camera->projection = projection;
+}
diff --git a/gltfview/src/game.h b/gltfview/src/game.h
new file mode 100644
index 0000000..92c0885
--- /dev/null
+++ b/gltfview/src/game.h
@@ -0,0 +1,32 @@
+#pragma once
+
+#include <gfx/gfx.h>
+#include <gfx/render_backend.h>
+#include <gfx/renderer.h>
+#include <gfx/scene/camera.h>
+#include <gfx/scene/scene.h>
+
+#include <stdbool.h>
+
+/// The delta time the game should be updated with.
+static const double game_dt = 1.0 / 60.0;
+
+/// Game state.
+typedef struct {
+  Gfx* gfx;
+  RenderBackend* render_backend;
+  Renderer* renderer;
+  Scene* scene;
+  SceneCamera* camera;
+  double elapsed;
+} Game;
+
+bool game_new(Game*, int argc, const char** argv);
+
+void game_end(Game*);
+
+void game_update(Game*, double t, double dt);
+
+void game_render(const Game*);
+
+void game_set_viewport(Game*, int width, int height);
diff --git a/gltfview/src/main.c b/gltfview/src/main.c
new file mode 100644
index 0000000..f7c372c
--- /dev/null
+++ b/gltfview/src/main.c
@@ -0,0 +1,65 @@
+#include "game.h"
+
+#include <gfx/gfx_app.h>
+#include <log/log.h>
+
+#include <stdlib.h>
+
+static bool init(const GfxAppDesc* desc, void** app_state) {
+  Game* game = calloc(1, sizeof(Game));
+  if (!game) {
+    LOGE("Failed to allocate game state");
+    return false;
+  }
+  if (!game_new(game, desc->argc, desc->argv)) {
+    LOGE("Failed to initialize game\n");
+    return false;
+  }
+  *app_state = game;
+  return true;
+}
+
+static void shutdown(void* app_state) {
+  assert(app_state);
+  Game* game = (Game*)(app_state);
+  game_end(game);
+}
+
+static void update(void* app_state, double t, double dt) {
+  assert(app_state);
+  Game* game = (Game*)(app_state);
+  game_update(game, t, dt);
+}
+
+static void render(void* app_state) {
+  assert(app_state);
+  Game* game = (Game*)(app_state);
+  game_render(game);
+}
+
+static void resize(void* app_state, int width, int height) {
+  assert(app_state);
+  Game* game = (Game*)(app_state);
+  game_set_viewport(game, width, height);
+}
+
+int main(int argc, const char** argv) {
+  const int initial_width = 1350;
+  const int initial_height = 900;
+  const int max_fps = 60;
+
+  gfx_app_run(&(GfxAppDesc){.argc = argc,
+                            .argv = argv,
+                            .width = initial_width,
+                            .height = initial_height,
+                            .max_fps = max_fps,
+                            .update_delta_time =
+                                max_fps > 0 ? 1.0 / (double)max_fps : 0.0},
+              &(GfxAppCallbacks){.init = init,
+                                 .update = update,
+                                 .render = render,
+                                 .resize = resize,
+                                 .shutdown = shutdown});
+
+  return 0;
+}