Implement experimental Vulkan backend

Source/Core/VideoBackends/Vulkan/FramebufferManager.h

@@ -0,0 +1,170 @@
+// Copyright 2016 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include <memory>
+
+#include "VideoCommon/FramebufferManagerBase.h"
+
+#include "VideoBackends/Vulkan/Constants.h"
+
+namespace Vulkan
+{
+class StagingTexture2D;
+class StateTracker;
+class StreamBuffer;
+class Texture2D;
+class VertexFormat;
+
+class XFBSource : public XFBSourceBase
+{
+  void DecodeToTexture(u32 xfb_addr, u32 fb_width, u32 fb_height) override {}
+  void CopyEFB(float gamma) override {}
+};
+
+class FramebufferManager : public FramebufferManagerBase
+{
+public:
+  FramebufferManager();
+  ~FramebufferManager();
+
+  bool Initialize();
+
+  VkRenderPass GetEFBRenderPass() const { return m_efb_render_pass; }
+  u32 GetEFBWidth() const { return m_efb_width; }
+  u32 GetEFBHeight() const { return m_efb_height; }
+  u32 GetEFBLayers() const { return m_efb_layers; }
+  VkSampleCountFlagBits GetEFBSamples() const { return m_efb_samples; }
+  Texture2D* GetEFBColorTexture() const { return m_efb_color_texture.get(); }
+  Texture2D* GetEFBDepthTexture() const { return m_efb_depth_texture.get(); }
+  VkFramebuffer GetEFBFramebuffer() const { return m_efb_framebuffer; }
+  void GetTargetSize(unsigned int* width, unsigned int* height) override;
+
+  std::unique_ptr<XFBSourceBase> CreateXFBSource(unsigned int target_width,
+                                                 unsigned int target_height,
+                                                 unsigned int layers) override
+  {
+    return std::make_unique<XFBSource>();
+  }
+
+  void CopyToRealXFB(u32 xfb_addr, u32 fb_stride, u32 fb_height, const EFBRectangle& source_rc,
+                     float gamma = 1.0f) override
+  {
+  }
+
+  void ResizeEFBTextures();
+
+  // Recompile shaders, use when MSAA mode changes.
+  void RecreateRenderPass();
+  void RecompileShaders();
+
+  // Reinterpret pixel format of EFB color texture.
+  // Assumes no render pass is currently in progress.
+  // Swaps EFB framebuffers, so re-bind afterwards.
+  void ReinterpretPixelData(int convtype);
+
+  // Resolve color/depth textures to a non-msaa texture, and return it.
+  Texture2D* ResolveEFBColorTexture(StateTracker* state_tracker, const VkRect2D& region);
+  Texture2D* ResolveEFBDepthTexture(StateTracker* state_tracker, const VkRect2D& region);
+
+  // Reads a framebuffer value back from the GPU. This may block if the cache is not current.
+  u32 PeekEFBColor(StateTracker* state_tracker, u32 x, u32 y);
+  float PeekEFBDepth(StateTracker* state_tracker, u32 x, u32 y);
+  void InvalidatePeekCache();
+
+  // Writes a value to the framebuffer. This will never block, and writes will be batched.
+  void PokeEFBColor(StateTracker* state_tracker, u32 x, u32 y, u32 color);
+  void PokeEFBDepth(StateTracker* state_tracker, u32 x, u32 y, float depth);
+  void FlushEFBPokes(StateTracker* state_tracker);
+
+private:
+  struct EFBPokeVertex
+  {
+    float position[4];
+    u32 color;
+  };
+
+  bool CreateEFBRenderPass();
+  void DestroyEFBRenderPass();
+  bool CreateEFBFramebuffer();
+  void DestroyEFBFramebuffer();
+
+  bool CompileConversionShaders();
+  void DestroyConversionShaders();
+
+  bool CreateReadbackRenderPasses();
+  void DestroyReadbackRenderPasses();
+  bool CompileReadbackShaders();
+  void DestroyReadbackShaders();
+  bool CreateReadbackTextures();
+  void DestroyReadbackTextures();
+  bool CreateReadbackFramebuffer();
+  void DestroyReadbackFramebuffer();
+
+  void CreatePokeVertexFormat();
+  bool CreatePokeVertexBuffer();
+  void DestroyPokeVertexBuffer();
+  bool CompilePokeShaders();
+  void DestroyPokeShaders();
+
+  bool PopulateColorReadbackTexture(StateTracker* state_tracker);
+  bool PopulateDepthReadbackTexture(StateTracker* state_tracker);
+
+  void CreatePokeVertices(std::vector<EFBPokeVertex>* destination_list, u32 x, u32 y, float z,
+                          u32 color);
+
+  void DrawPokeVertices(StateTracker* state_tracker, const EFBPokeVertex* vertices,
+                        size_t vertex_count, bool write_color, bool write_depth);
+
+  VkRenderPass m_efb_render_pass = VK_NULL_HANDLE;
+  VkRenderPass m_depth_resolve_render_pass = VK_NULL_HANDLE;
+
+  u32 m_efb_width = 0;
+  u32 m_efb_height = 0;
+  u32 m_efb_layers = 1;
+  VkSampleCountFlagBits m_efb_samples = VK_SAMPLE_COUNT_1_BIT;
+
+  std::unique_ptr<Texture2D> m_efb_color_texture;
+  std::unique_ptr<Texture2D> m_efb_convert_color_texture;
+  std::unique_ptr<Texture2D> m_efb_depth_texture;
+  std::unique_ptr<Texture2D> m_efb_resolve_color_texture;
+  std::unique_ptr<Texture2D> m_efb_resolve_depth_texture;
+  VkFramebuffer m_efb_framebuffer = VK_NULL_HANDLE;
+  VkFramebuffer m_efb_convert_framebuffer = VK_NULL_HANDLE;
+  VkFramebuffer m_depth_resolve_framebuffer = VK_NULL_HANDLE;
+
+  // Format conversion shaders
+  VkShaderModule m_ps_rgb8_to_rgba6 = VK_NULL_HANDLE;
+  VkShaderModule m_ps_rgba6_to_rgb8 = VK_NULL_HANDLE;
+  VkShaderModule m_ps_depth_resolve = VK_NULL_HANDLE;
+
+  // EFB readback texture
+  std::unique_ptr<Texture2D> m_color_copy_texture;
+  std::unique_ptr<Texture2D> m_depth_copy_texture;
+  VkFramebuffer m_color_copy_framebuffer = VK_NULL_HANDLE;
+  VkFramebuffer m_depth_copy_framebuffer = VK_NULL_HANDLE;
+
+  // CPU-side EFB readback texture
+  std::unique_ptr<StagingTexture2D> m_color_readback_texture;
+  std::unique_ptr<StagingTexture2D> m_depth_readback_texture;
+  bool m_color_readback_texture_valid = false;
+  bool m_depth_readback_texture_valid = false;
+
+  // EFB poke drawing setup
+  std::unique_ptr<VertexFormat> m_poke_vertex_format;
+  std::unique_ptr<StreamBuffer> m_poke_vertex_stream_buffer;
+  std::vector<EFBPokeVertex> m_color_poke_vertices;
+  std::vector<EFBPokeVertex> m_depth_poke_vertices;
+  VkPrimitiveTopology m_poke_primitive_topology = VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST;
+
+  VkRenderPass m_copy_color_render_pass = VK_NULL_HANDLE;
+  VkRenderPass m_copy_depth_render_pass = VK_NULL_HANDLE;
+  VkShaderModule m_copy_color_shader = VK_NULL_HANDLE;
+  VkShaderModule m_copy_depth_shader = VK_NULL_HANDLE;
+
+  VkShaderModule m_poke_vertex_shader = VK_NULL_HANDLE;
+  VkShaderModule m_poke_geometry_shader = VK_NULL_HANDLE;
+  VkShaderModule m_poke_fragment_shader = VK_NULL_HANDLE;
+};
+
+}  // namespace Vulkan