Implement D3D12 backend

Source/Core/VideoBackends/D3D12/DXShader.h

@@ -0,0 +1,32 @@
+// Copyright 2019 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+#include <memory>
+#include "VideoBackends/D3D12/Common.h"
+#include "VideoBackends/D3DCommon/Shader.h"
+
+namespace DX12
+{
+class DXShader final : public D3DCommon::Shader
+{
+public:
+  ~DXShader() override;
+
+  ID3D12PipelineState* GetComputePipeline() const { return m_compute_pipeline.Get(); }
+  D3D12_SHADER_BYTECODE GetD3DByteCode() const;
+
+  static std::unique_ptr<DXShader> CreateFromBytecode(ShaderStage stage, BinaryData bytecode);
+  static std::unique_ptr<DXShader> CreateFromSource(ShaderStage stage, const char* source,
+                                                    size_t length);
+
+private:
+  DXShader(ShaderStage stage, BinaryData bytecode);
+
+  bool CreateComputePipeline();
+
+  ComPtr<ID3D12PipelineState> m_compute_pipeline;
+};
+
+}  // namespace DX12