add stb_image, fix texture asset loading

src/assets.c

@@ -14,6 +14,8 @@ static Asset 		 Texture_Asset_Lookup[TEXTURE_ASSET_MAX];
 static AssetFile Shader_Assets[SHADER_ASSET_MAX];
 static Asset		 Shader_Asset_Lookup[SHADER_ASSET_MAX];
 
+static b32 ASSET_HEADER_LOADED = false;
+
 
 // ::Assets::Global::End::
 
@@ -40,16 +42,31 @@ static void LoadAssetPackHeader()
 
 static Asset LoadTextureAsset(TextureAsset asset_id)
 {
+	if (!ASSET_HEADER_LOADED)
+	{
+		LoadAssetPackHeader();
+	}
+
 	Assert(asset_id < i32(TEXTURE_ASSET_MAX), "LoadTextureAsset failure: asset_id is higher than TEXTURE_ASSET_MAX");
 
 	Asset asset = Texture_Asset_Lookup[asset_id];
+
 	if (asset.bytes == NULL)
 	{
 		AssetFile *asset_info = Texture_Assets + asset_id;
-		asset.bytes = FLMemAlloc(asset_info->len);
+		u8 *img = FLMemAlloc(asset_info->len);
-		MemCpy(asset.bytes, &ASSET_PACK[asset_info->data_offset], asset_info->len);
+		MemCpy(img, &ASSET_PACK[asset_info->data_offset], asset_info->len);
+
+		int x, y, ch;
+		asset.bytes = stbi_load_from_memory(img, asset_info->len, &x, &y, &ch, 4);
+
 		asset.len = asset_info->len;
+		asset.texture_meta.w = u32(x);
+		asset.texture_meta.h = u32(y);
+
 		Texture_Asset_Lookup[asset_id] = asset;
+
+		FLMemFree(img);
 	}
 
 	return asset;
@@ -57,6 +74,11 @@ static Asset LoadTextureAsset(TextureAsset asset_id)
 
 static Asset LoadShaderAsset(ShaderAsset asset_id)
 {
+	if (!ASSET_HEADER_LOADED)
+	{
+		LoadAssetPackHeader();
+	}
+
 	Assert(asset_id < SHADER_ASSET_MAX, "LoadShaderAsset failure: asset_id is higher than SHADER_ASSET_MAX");
 
 	Asset asset = Shader_Asset_Lookup[asset_id];
@@ -82,7 +104,7 @@ static void UnloadTextureAsset(Asset asset)
 		{
 			Texture_Asset_Lookup[i].bytes = NULL;
 			Texture_Asset_Lookup[i].len = 0;
-			FLMemFree(asset.bytes);
+			stbi_image_free(asset.bytes);
 			break;
 		}
 	}

src/assets.h

@@ -61,10 +61,20 @@ typedef enum ModelAssetTag_e
 	MODEL_ASSET_TAG_MAX,
 } ModelAssetTag;
 
+typedef struct TextureAssetMeta
+{
+	u32 w;
+	u32 h;
+} TextureAssetMeta;
+
 typedef struct Asset
 {
 	u8  *bytes;
 	u64	len;
+	union 
+	{
+		TextureAssetMeta texture_meta;
+	};
 } Asset;
 
 typedef struct AssetTag

src/entry_linux.h

@@ -6,10 +6,13 @@
 
 #define STB_SPRINTF_IMPLEMENTATION
 
+#define STB_IMAGE_IMPLEMENTATION
+
 #define WINDOW_NAME "Video Game"
 
 // ::ThirdParty::Include::Header::
 #include "stb/stb_sprintf.h"
+#include "stb/stb_image.h"
 #include "xxhash/xxhash.h"
 #include "fastlz/fastlz.h"
 

src/entry_windows.h

@@ -4,9 +4,14 @@
 
 #define STB_SPRINTF_IMPLEMENTATION
 
+#define STB_IMAGE_IMPLEMENTATION
+
 #define WINDOW_NAME "Video Game"
 
 #include "stb/stb_sprintf.h"
+#include "stb/stb_image.h"
+#include "xxhash/xxhash.h"
+#include "fastlz/fastlz.h"
 
 #include "shared_types.h"
 #include "ds.h"

src/game.c

@@ -18,8 +18,6 @@ i16 mouse_pos_y = 0;
 
 static void InitializeGame(Arena *arena, GameContext *ctx, Arena *ctx_arena) 
 {
-	LoadAssetPackHeader();
-
   Assert(InitRenderer(arena), "Failed to initialize the renderer");
 
 	ctx->gui.vertices = MakeArray(ctx_arena, GUIVertex, 128);