VideoBackends: Add Metal renderer

Source/Core/VideoBackends/Metal/MTLVertexManager.h

@@ -0,0 +1,30 @@
+// Copyright 2022 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include "VideoBackends/Metal/MTLUtil.h"
+#include "VideoCommon/VertexManagerBase.h"
+
+namespace Metal
+{
+class VertexManager final : public VertexManagerBase
+{
+public:
+  VertexManager();
+  ~VertexManager() override;
+
+  void UploadUtilityUniforms(const void* uniforms, u32 uniforms_size) override;
+  bool UploadTexelBuffer(const void* data, u32 data_size, TexelBufferFormat format,
+                         u32* out_offset) override;
+  bool UploadTexelBuffer(const void* data, u32 data_size, TexelBufferFormat format, u32* out_offset,
+                         const void* palette_data, u32 palette_size,
+                         TexelBufferFormat palette_format, u32* out_palette_offset) override;
+
+protected:
+  void ResetBuffer(u32 vertex_stride) override;
+  void CommitBuffer(u32 num_vertices, u32 vertex_stride, u32 num_indices, u32* out_base_vertex,
+                    u32* out_base_index) override;
+  void UploadUniforms() override;
+};
+}  // namespace Metal