From eba20320bf8d542a46dc3fd84ec401057a25b9da Mon Sep 17 00:00:00 2001
From: 3gg <3gg@shellblade.net>
Date: Sun, 28 Dec 2025 12:58:22 -0800
Subject: swgfx no longer allocates

---
 src/main.c | 34 ++++++++++++++++------------------
 1 file changed, 16 insertions(+), 18 deletions(-)

(limited to 'src')

diff --git a/src/main.c b/src/main.c
index 1c017f0..e0b54c1 100644
--- a/src/main.c
+++ b/src/main.c
@@ -14,10 +14,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-static constexpr int     BufferWidth  = 160;
-static constexpr int     BufferHeight = 120;
-static constexpr sgVec2i BufferDims   = (sgVec2i){.x = BufferWidth, .y = BufferHeight};
-static constexpr R       Aspect       = (R)BufferWidth / (R)BufferHeight;
+static constexpr int BufferWidth  = 160;
+static constexpr int BufferHeight = 120;
+static constexpr R   Aspect       = (R)BufferWidth / (R)BufferHeight;
 
 static const char*   WindowTitle  = "GAME";
 // Window dimensions must be an integer scaling of buffer dimensions.
@@ -63,8 +62,8 @@ typedef struct Camera {
 
 typedef struct State {
   SDL_Window*      window;
+  void*            gfx_mem;
   swgfx*           gfx;
-  sgPixel*         colour;
   Model*           model;
   Camera           camera;
   CameraController camera_controller;
@@ -146,7 +145,7 @@ static void RenderIndexedModel(swgfx* gfx, const IndexedModel* model) {
   assert(gfx);
   assert(model);
   const sgTriIdx*  tris   = (const sgTriIdx*)(model->data + model->offsetTris);
-  const sgVec3* positions = (const sgVec3*)(model->data + model->offsetPositions);
+  const sgVec3* positions = (const sgVec3*)  (model->data + model->offsetPositions);
   sgTrianglesIndexedNonUniform(gfx, model->numTris, tris, positions);
 }
 
@@ -206,7 +205,6 @@ static bool Render(State* state) {
 
   const Camera* cam = &state->camera;
 
-  sgColourBuffer(state->gfx, BufferDims, state->colour);
   sgClear(state->gfx);
   sgViewport(state->gfx, 0, 0, BufferWidth, BufferHeight);
   sgCheck(state->gfx);
@@ -263,18 +261,17 @@ static bool Initialize(State* state) {
     fprintf(stderr, "SDL_CreateWindow failed\n");
     return false;
   }
-  
-  if (!(state->gfx = sgNew())) {
-    fprintf(stderr, "sgNew failed\n");
+
+  const size_t sg_mem_size = sgMem(BufferWidth, BufferHeight);
+  if (!(state->gfx_mem = calloc(1, sg_mem_size))) {
+    fprintf(stderr, "Failed to allocate memory for graphics\n");
     return false;
   }
   
-  if (!(state->colour = SG_ALIGN_ALLOC(BufferWidth * BufferHeight, sgPixel))) {
-    fprintf(stderr, "Failed to allocate colour buffer\n");
+  if (!(state->gfx = sgNew(BufferWidth, BufferHeight, state->gfx_mem))) {
+    fprintf(stderr, "sgNew failed\n");
     return false;
   }
-  
-  sgColourBuffer(state->gfx, BufferDims, state->colour);
 
   const char* model_path = "/home/jeanne/blender/box.mdl";
   if (!(state->model = read_file(model_path))) {
@@ -308,13 +305,14 @@ static void Shutdown(State* state) {
     state->model = nullptr;
   }
   
-  if (state->colour) {
-    SG_FREE(&state->colour);
-  }
-  
   if (state->gfx) {
     sgDel(&state->gfx);
   }
+
+  if (state->gfx_mem) {
+    free(state->gfx_mem);
+    state->gfx_mem = nullptr;
+  }
   
   if (state->window) {
     SDL_DestroyWindow(state->window);
-- 
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