rewrite shaders

src/core/renderer_mtl/renderer_mtl.cpp

@@ -36,6 +36,13 @@ void RendererMTL::initGraphicsContext(SDL_Window* window) {
 	device = MTL::CreateSystemDefaultDevice();
 	metalLayer->setDevice(device);
 	commandQueue = device->newCommandQueue();
+
+	// HACK
+	MTL::TextureDescriptor* descriptor = MTL::TextureDescriptor::texture2DDescriptor(MTL::PixelFormatRGBA8Unorm, 400, 240, false);
+	topScreenTexture = device->newTexture(descriptor);
+
+	// Pipelines
+	// TODO
 }
 
 void RendererMTL::clearBuffer(u32 startAddress, u32 endAddress, u32 value, u32 control) {

src/host_shaders/metal_display.metal

@@ -1,16 +0,0 @@
-struct VertexOut {
-    float4 position [[position]];
-    float2 uv;
-};
-
-vertex VertexOut vertexMain(uint vid [[vertex_id]]) {
-    VertexOut out;
-	out.uv = float2((vid << 1) & 2, vid & 2);
-	out.position = float4(out.uv * 2.0f + -1.0f, 0.0f, 1.0f);
-
-	return out;
-}
-
-fragment float4 fragmentMain(VertexOut in [[stage_in]], texture2d<float> tex [[texture(0)]], sampler samplr [[sampler(0)]]) {
-    return tex.sample(samplr, in.uv);
-}

src/host_shaders/metal_shaders.metal

@@ -0,0 +1,36 @@
+struct DisplayVertexOut {
+	float4 position [[position]];
+	float2 uv;
+};
+
+vertex DisplayVertexOut vertexDisplay(uint vid [[vertex_id]]) {
+	DisplayVertexOut out;
+	out.uv = float2((vid << 1) & 2, vid & 2);
+	out.position = float4(out.uv * 2.0f + -1.0f, 0.0f, 1.0f);
+
+	return out;
+}
+
+fragment float4 fragmentDisplay(DisplayVertexOut in [[stage_in]], texture2d<float> tex [[texture(0)]], sampler samplr [[sampler(0)]]) {
+	return tex.sample(samplr, in.uv);
+}
+
+struct DrawVertexIn {
+	float4 position [[attribute(0)]];
+	float4 color [[attribute(2)]];
+};
+
+struct DrawVertexOut {
+	float4 position [[position]];
+	float4 color;
+};
+
+vertex DrawVertexOut vertexDraw(DrawVertexIn in [[stage_in]]) {
+	DrawVertexOut out;
+	out.position = in.position;
+	out.color = in.color;
+
+	return out;
+}
+
+fragment float4 fragmentDraw(DrawVertexOut in [[stage_in]]) { return in.color; }