VideoBackends: Add AbstractShader and AbstractPipeline classes

Source/Core/VideoCommon/AbstractShader.h

@@ -0,0 +1,34 @@
+// Copyright 2017 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <cstddef>
+#include <string>
+#include <vector>
+
+#include "Common/CommonTypes.h"
+
+enum class ShaderStage
+{
+  Vertex,
+  Geometry,
+  Pixel,
+  Compute
+};
+
+class AbstractShader
+{
+public:
+  explicit AbstractShader(ShaderStage stage) : m_stage(stage) {}
+  virtual ~AbstractShader() = default;
+
+  ShaderStage GetStage() const { return m_stage; }
+  using BinaryData = std::vector<u8>;
+  virtual bool HasBinary() const = 0;
+  virtual BinaryData GetBinary() const = 0;
+
+protected:
+  ShaderStage m_stage;
+};