Function GraphicsInit

source/graphics.cpp:219–393

// ***********************************************************************

void GraphicsInit(SDL_Window* pWindow, i32 winWidth, i32 winHeight) {
	Arena* pArena = ArenaCreate();
	pRenderState = New(pArena, RenderState);
	pRenderState->pArena = pArena;

	pRenderState->vertexState.pArena = pArena;
	pRenderState->drawList3D.pArena = pArena;
	pRenderState->drawList2D.pArena = pArena;
	pRenderState->perFrameVertexBuffer.pArena = pArena;
	pRenderState->perFrameIndexBuffer.pArena = pArena;

	pRenderState->targetResolution = Vec2f(320.0f, 240.0f);

	// init_backend stuff
	GraphicsBackendInit(pWindow, winWidth, winHeight);
	sg_desc desc = {
		.environment = SokolGetEnvironment()
	};
	sg_setup(&desc);

	// Create white texture for non textured draws
	{
		u32 pixels[4];
		memset(pixels, 0xFF, sizeof(pixels));

		sg_image_desc imageDesc = {
			.type = SG_IMAGETYPE_2D,
			.width = 2,
			.height = 2,
			.pixel_format = SG_PIXELFORMAT_RGBA8,
			.label = "white"
		};

		imageDesc.data.subimage[0][0].ptr = (void*)pixels;
		imageDesc.data.subimage[0][0].size = sizeof(pixels);
		pRenderState->whiteTexture = sg_make_image(&imageDesc);
	}

	// Compositor Pipeline
	{
		sg_pipeline_desc pipelineDesc = {
			.shader = sg_make_shader(compositor_shader_desc(SG_BACKEND_D3D11)),
			.layout = {
				.buffers = { {.stride = sizeof(VertexData) } },
				.attrs = {
					{ .offset = offsetof(VertexData, pos), .format = SG_VERTEXFORMAT_FLOAT3 },
					{ .offset = offsetof(VertexData, col), .format = SG_VERTEXFORMAT_FLOAT4 },
					{ .offset = offsetof(VertexData, tex), .format = SG_VERTEXFORMAT_FLOAT2 },
					{ .offset = offsetof(VertexData, norm), .format = SG_VERTEXFORMAT_FLOAT3 }
				}
			},
			.depth = {
				.compare = SG_COMPAREFUNC_LESS_EQUAL,
				.write_enabled = true,
			},
			.colors = {
				{
					.write_mask = SG_COLORMASK_RGB,