D3D12: Initial commit for D3D12 backend implementation.

Source/Core/VideoBackends/D3D12/ShaderConstantsManager.h

@@ -0,0 +1,23 @@
+// Copyright 2015 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "ShaderCache.h"
+
+namespace DX12
+{
+
+class ShaderConstantsManager final
+{
+public:
+	static void Init();
+	static void Shutdown();
+
+	static bool LoadAndSetGeometryShaderConstants();
+	static bool LoadAndSetPixelShaderConstants();
+	static bool LoadAndSetVertexShaderConstants();
+};
+
+}