FrontendCommon: Add a Vulkan host display interface

src/frontend-common/vulkan_host_display.h

@@ -0,0 +1,87 @@
+#pragma once
+#include "common/vulkan/staging_texture.h"
+#include "common/vulkan/swap_chain.h"
+#include "common/window_info.h"
+#include "core/host_display.h"
+#include "vulkan_loader.h"
+#include <memory>
+#include <string_view>
+
+namespace Vulkan {
+class StreamBuffer;
+class SwapChain;
+} // namespace Vulkan
+
+namespace FrontendCommon {
+
+class VulkanHostDisplay
+{
+public:
+  VulkanHostDisplay();
+  ~VulkanHostDisplay();
+
+  ALWAYS_INLINE HostDisplay::RenderAPI GetRenderAPI() const { return HostDisplay::RenderAPI::Vulkan; }
+  ALWAYS_INLINE void* GetRenderDevice() const { return nullptr; }
+  ALWAYS_INLINE void* GetRenderContext() const { return nullptr; }
+
+  std::unique_ptr<HostDisplayTexture> CreateTexture(u32 width, u32 height, const void* data, u32 data_stride,
+                                                    bool dynamic);
+  void UpdateTexture(HostDisplayTexture* texture, u32 x, u32 y, u32 width, u32 height, const void* data,
+                     u32 data_stride);
+  bool DownloadTexture(const void* texture_handle, u32 x, u32 y, u32 width, u32 height, void* out_data,
+                       u32 out_data_stride);
+
+  void SetVSync(bool enabled);
+
+  bool BeginRender();
+  void RenderDisplay(s32 left, s32 top, s32 width, s32 height, void* texture_handle, u32 texture_width,
+                     u32 texture_height, u32 texture_view_x, u32 texture_view_y, u32 texture_view_width,
+                     u32 texture_view_height, bool linear_filter);
+  void RenderImGui();
+  void RenderSoftwareCursor(s32 left, s32 top, s32 width, s32 height, HostDisplayTexture* texture_handle);
+  void EndRenderAndPresent();
+
+  bool CreateContextAndSwapChain(const WindowInfo& wi, bool debug_device);
+  bool HasContext() const;
+  void DestroyContext();
+
+  void CreateShaderCache(std::string_view shader_cache_directory, bool debug_shaders);
+  void DestroyShaderCache();
+
+  bool CreateResources();
+  void DestroyResources();
+
+  bool CreateImGuiContext();
+  void DestroyImGuiContext();
+
+  ALWAYS_INLINE u32 GetSwapChainWidth() const { return m_swap_chain->GetWidth(); }
+  ALWAYS_INLINE u32 GetSwapChainHeight() const { return m_swap_chain->GetHeight(); }
+  ALWAYS_INLINE bool HasSwapChain() const { return static_cast<bool>(m_swap_chain); }
+
+  bool RecreateSwapChain(const WindowInfo& new_wi);
+  void ResizeSwapChain(u32 new_width, u32 new_height);
+  void DestroySwapChain();
+
+private:
+  struct PushConstants
+  {
+    float src_rect_left;
+    float src_rect_top;
+    float src_rect_width;
+    float src_rect_height;
+  };
+
+  std::unique_ptr<Vulkan::SwapChain> m_swap_chain;
+
+  VkDescriptorSetLayout m_descriptor_set_layout = VK_NULL_HANDLE;
+  VkPipelineLayout m_pipeline_layout = VK_NULL_HANDLE;
+  VkPipeline m_software_cursor_pipeline = VK_NULL_HANDLE;
+  VkPipeline m_display_pipeline = VK_NULL_HANDLE;
+  VkSampler m_point_sampler = VK_NULL_HANDLE;
+  VkSampler m_linear_sampler = VK_NULL_HANDLE;
+
+  Vulkan::StagingTexture m_upload_staging_texture;
+  Vulkan::StagingTexture m_readback_staging_texture;
+};
+
+} // namespace FrontendCommon