From 4212e57d06afac8a19b09fdebc24bad10b78f1ac Mon Sep 17 00:00:00 2001
From: 3gg <3gg@shellblade.net>
Date: Fri, 19 Jan 2024 07:21:45 -0800
Subject: Plugin refactor, moving scene from game to plugin.

---
 gltfview/src/plugins/texture_view.c | 91 +++++++++++++++++++++++++++++++++----
 1 file changed, 82 insertions(+), 9 deletions(-)

(limited to 'gltfview/src/plugins/texture_view.c')

diff --git a/gltfview/src/plugins/texture_view.c b/gltfview/src/plugins/texture_view.c
index f16c8d1..b424158 100644
--- a/gltfview/src/plugins/texture_view.c
+++ b/gltfview/src/plugins/texture_view.c
@@ -1,6 +1,7 @@
-#include "texture_view.h"
+#include "plugin.h"
 
 #include <gfx/render_backend.h>
+#include <gfx/renderer.h>
 #include <gfx/scene.h>
 #include <gfx/util/geometry.h>
 #include <gfx/util/shader.h>
@@ -9,13 +10,25 @@
 #include <math/camera.h>
 
 #include <assert.h>
+#include <stdlib.h>
 
 // Default texture to load if no texture is provided.
 static const char* DEFAULT_TEXTURE = "/assets/skybox/clouds1/clouds1_west.bmp";
 // static const char* DEFAULT_TEXTURE = "/assets/checkerboard.jpg";
 
-bool boot(State* state, Game* game) {
+struct State {
+  Scene*       scene;
+  SceneCamera* camera;
+};
+
+bool init(Game* game, State** pp_state) {
   assert(game);
+  assert(pp_state);
+
+  State* state = calloc(1, sizeof(State));
+  if (!state) {
+    goto cleanup;
+  }
 
   // Usage: [texture file]
   const char* texture_file = game->argc > 1 ? game->argv[1] : DEFAULT_TEXTURE;
@@ -30,17 +43,17 @@ bool boot(State* state, Game* game) {
                           .mipmaps               = false,
                           .data.texture.filepath = mstring_make(texture_file)});
   if (!texture) {
-    return false;
+    goto cleanup;
   }
 
   ShaderProgram* shader = gfx_make_view_texture_shader(render_backend);
   if (!shader) {
-    return false;
+    goto cleanup;
   }
 
   Geometry* geometry = gfx_make_quad_11(render_backend);
   if (!geometry) {
-    return false;
+    goto cleanup;
   }
 
   MaterialDesc material_desc = (MaterialDesc){.num_uniforms = 1};
@@ -50,25 +63,85 @@ bool boot(State* state, Game* game) {
        .name          = sstring_make("Texture")};
   Material* material = gfx_make_material(&material_desc);
   if (!material) {
-    return false;
+    goto cleanup;
   }
 
   const MeshDesc mesh_desc =
       (MeshDesc){.geometry = geometry, .material = material, .shader = shader};
   Mesh* mesh = gfx_make_mesh(&mesh_desc);
   if (!mesh) {
-    return false;
+    goto cleanup;
   }
 
   SceneObject* object = gfx_make_object();
   if (!object) {
-    return false;
+    goto cleanup;
   }
   gfx_add_object_mesh(object, mesh);
 
+  if (!(state->scene = gfx_make_scene())) {
+    goto cleanup;
+  }
+
   SceneNode* node = gfx_make_object_node(object);
-  SceneNode* root = gfx_get_scene_root(game->scene);
+  if (!node) {
+    goto cleanup;
+  }
+  SceneNode* root = gfx_get_scene_root(state->scene);
+  if (!root) {
+    goto cleanup;
+  }
   gfx_set_node_parent(node, root);
 
+  if (!(state->camera = gfx_make_camera())) {
+    goto cleanup;
+  }
+
+  *pp_state = state;
   return true;
+
+cleanup:
+  shutdown(game, state);
+  if (state) {
+    free(state);
+  }
+  return false;
+}
+
+void shutdown(Game* game, State* state) {
+  assert(game);
+  if (state) {
+    gfx_destroy_camera(&state->camera);
+    gfx_destroy_scene(&state->scene);
+    // State freed by plugin engine.
+  }
+}
+
+void render(const Game* game, const State* state) {
+  assert(game);
+  assert(state);
+
+  Renderer* renderer = gfx_get_renderer(game->gfx);
+  gfx_render_scene(
+      renderer, &(RenderSceneParams){
+                    .mode   = RenderDefault,
+                    .scene  = state->scene,
+                    .camera = state->camera});
+}
+
+void resize(Game* game, State* state, int width, int height) {
+  assert(game);
+  assert(state);
+
+  RenderBackend* render_backend = gfx_get_render_backend(game->gfx);
+  gfx_set_viewport(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(state->camera);
+  camera->projection = projection;
 }
-- 
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