VideoBackends: Add Metal renderer

Source/Core/VideoBackends/Metal/MTLRenderer.h

@@ -0,0 +1,91 @@
+// Copyright 2022 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <Metal/Metal.h>
+#include <QuartzCore/QuartzCore.h>
+
+#include "VideoCommon/RenderBase.h"
+
+#include "VideoBackends/Metal/MRCHelpers.h"
+
+namespace Metal
+{
+class Framebuffer;
+class Texture;
+
+class Renderer final : public ::Renderer
+{
+public:
+  Renderer(MRCOwned<CAMetalLayer*> layer, int width, int height, float layer_scale);
+  ~Renderer() override;
+
+  bool IsHeadless() const override;
+
+  bool Initialize() override;
+
+  std::unique_ptr<AbstractTexture> CreateTexture(const TextureConfig& config,
+                                                 std::string_view name) override;
+  std::unique_ptr<AbstractStagingTexture>
+  CreateStagingTexture(StagingTextureType type, const TextureConfig& config) override;
+  std::unique_ptr<AbstractFramebuffer>
+  CreateFramebuffer(AbstractTexture* color_attachment, AbstractTexture* depth_attachment) override;
+
+  std::unique_ptr<AbstractShader> CreateShaderFromSource(ShaderStage stage, std::string_view source,
+                                                         std::string_view name) override;
+  std::unique_ptr<AbstractShader> CreateShaderFromBinary(ShaderStage stage, const void* data,
+                                                         size_t length,
+                                                         std::string_view name) override;
+  std::unique_ptr<AbstractShader> CreateShaderFromMSL(ShaderStage stage, std::string msl,
+                                                      std::string_view glsl, std::string_view name);
+  std::unique_ptr<NativeVertexFormat>
+  CreateNativeVertexFormat(const PortableVertexDeclaration& vtx_decl) override;
+  std::unique_ptr<AbstractPipeline> CreatePipeline(const AbstractPipelineConfig& config,
+                                                   const void* cache_data = nullptr,
+                                                   size_t cache_data_length = 0) override;
+
+  void Flush() override;
+  void WaitForGPUIdle() override;
+  void OnConfigChanged(u32 bits) override;
+
+  void ClearScreen(const MathUtil::Rectangle<int>& rc, bool color_enable, bool alpha_enable,
+                   bool z_enable, u32 color, u32 z) override;
+
+  void SetPipeline(const AbstractPipeline* pipeline) override;
+  void SetFramebuffer(AbstractFramebuffer* framebuffer) override;
+  void SetAndDiscardFramebuffer(AbstractFramebuffer* framebuffer) override;
+  void SetAndClearFramebuffer(AbstractFramebuffer* framebuffer, const ClearColor& color_value = {},
+                              float depth_value = 0.0f) override;
+  void SetScissorRect(const MathUtil::Rectangle<int>& rc) override;
+  void SetTexture(u32 index, const AbstractTexture* texture) override;
+  void SetSamplerState(u32 index, const SamplerState& state) override;
+  void SetComputeImageTexture(AbstractTexture* texture, bool read, bool write) override;
+  void UnbindTexture(const AbstractTexture* texture) override;
+  void SetViewport(float x, float y, float width, float height, float near_depth,
+                   float far_depth) override;
+  void Draw(u32 base_vertex, u32 num_vertices) override;
+  void DrawIndexed(u32 base_index, u32 num_indices, u32 base_vertex) override;
+  void DispatchComputeShader(const AbstractShader* shader, u32 groupsize_x, u32 groupsize_y,
+                             u32 groupsize_z, u32 groups_x, u32 groups_y, u32 groups_z) override;
+  void BindBackbuffer(const ClearColor& clear_color = {}) override;
+  void PresentBackbuffer() override;
+
+protected:
+  std::unique_ptr<::BoundingBox> CreateBoundingBox() const override;
+
+private:
+  MRCOwned<CAMetalLayer*> m_layer;
+  MRCOwned<id<CAMetalDrawable>> m_drawable;
+  std::unique_ptr<Texture> m_bb_texture;
+  std::unique_ptr<Framebuffer> m_backbuffer;
+  u32 m_texture_counter = 0;
+  u32 m_staging_texture_counter = 0;
+  std::array<u32, 4> m_shader_counter = {};
+  u32 m_pipeline_counter = 0;
+
+  void CheckForSurfaceChange();
+  void CheckForSurfaceResize();
+  void SetupSurface();
+};
+}  // namespace Metal