Starting metal backend

src/Engine/Graphics/Metal/RenderPass.h

@@ -0,0 +1,20 @@
+#pragma once
+#include "Graphics/RenderTarget.h"
+#include "Graphics.h"
+
+namespace Seele 
+{
+namespace Metal 
+{
+class RenderPass : public Gfx::RenderPass
+{
+public:
+    RenderPass(PGraphics graphics, Gfx::RenderTargetLayout layout, Array<Gfx::SubPassDependency> dependencies, Gfx::PViewport viewport);
+    virtual ~RenderPass();
+private:
+    PGraphics graphics;
+    Gfx::PViewport viewport;
+};
+DEFINE_REF(RenderPass)
+} // namespace Metal
+} // namespace Seele