VideoBackends: Add Metal renderer

Source/Core/VideoBackends/Metal/MTLShader.h

@@ -0,0 +1,30 @@
+// Copyright 2022 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <Metal/Metal.h>
+
+#include "VideoBackends/Metal/MRCHelpers.h"
+
+#include "VideoCommon/AbstractPipeline.h"
+#include "VideoCommon/AbstractShader.h"
+
+namespace Metal
+{
+class Shader : public AbstractShader
+{
+public:
+  explicit Shader(ShaderStage stage, std::string msl, MRCOwned<id<MTLFunction>> shader)
+      : AbstractShader(stage), m_msl(std::move(msl)), m_shader(std::move(shader))
+  {
+  }
+
+  id<MTLFunction> GetShader() const { return m_shader; }
+  BinaryData GetBinary() const override { return BinaryData(m_msl.begin(), m_msl.end()); }
+
+private:
+  std::string m_msl;
+  MRCOwned<id<MTLFunction>> m_shader;
+};
+}  // namespace Metal