Implement experimental Vulkan backend

Source/Core/VideoBackends/Vulkan/SwapChain.h

@@ -0,0 +1,93 @@
+// Copyright 2016 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <vector>
+
+#include "VideoBackends/Vulkan/Constants.h"
+#include "VideoBackends/Vulkan/Texture2D.h"
+
+namespace Vulkan
+{
+class CommandBufferManager;
+class ObjectCache;
+
+class SwapChain
+{
+public:
+  SwapChain(void* native_handle, VkSurfaceKHR surface);
+  ~SwapChain();
+
+  // Creates a vulkan-renderable surface for the specified window handle.
+  static VkSurfaceKHR CreateVulkanSurface(VkInstance instance, void* hwnd);
+
+  // Create a new swap chain from a pre-existing surface.
+  static std::unique_ptr<SwapChain> Create(void* native_handle, VkSurfaceKHR surface);
+
+  void* GetNativeHandle() const { return m_native_handle; }
+  VkSurfaceKHR GetSurface() const { return m_surface; }
+  VkSurfaceFormatKHR GetSurfaceFormat() const { return m_surface_format; }
+  VkSwapchainKHR GetSwapChain() const { return m_swap_chain; }
+  VkRenderPass GetRenderPass() const { return m_render_pass; }
+  u32 GetWidth() const { return m_width; }
+  u32 GetHeight() const { return m_height; }
+  u32 GetCurrentImageIndex() const { return m_current_swap_chain_image_index; }
+  VkImage GetCurrentImage() const
+  {
+    return m_swap_chain_images[m_current_swap_chain_image_index].image;
+  }
+  Texture2D* GetCurrentTexture() const
+  {
+    return m_swap_chain_images[m_current_swap_chain_image_index].texture.get();
+  }
+  VkFramebuffer GetCurrentFramebuffer() const
+  {
+    return m_swap_chain_images[m_current_swap_chain_image_index].framebuffer;
+  }
+
+  VkResult AcquireNextImage(VkSemaphore available_semaphore);
+
+  bool RecreateSurface(void* native_handle);
+  bool ResizeSwapChain();
+
+private:
+  bool SelectSurfaceFormat();
+  bool SelectPresentMode();
+
+  bool CreateSwapChain();
+  void DestroySwapChain();
+
+  bool CreateRenderPass();
+  void DestroyRenderPass();
+
+  bool SetupSwapChainImages();
+  void DestroySwapChainImages();
+
+  void DestroySurface();
+
+  struct SwapChainImage
+  {
+    VkImage image;
+    std::unique_ptr<Texture2D> texture;
+    VkFramebuffer framebuffer;
+  };
+
+  void* m_native_handle = nullptr;
+  VkSurfaceKHR m_surface = nullptr;
+  VkSurfaceFormatKHR m_surface_format = {};
+  VkPresentModeKHR m_present_mode = VK_PRESENT_MODE_RANGE_SIZE_KHR;
+
+  VkSwapchainKHR m_swap_chain = nullptr;
+  std::vector<SwapChainImage> m_swap_chain_images;
+  u32 m_current_swap_chain_image_index = 0;
+
+  VkRenderPass m_render_pass = nullptr;
+
+  u32 m_width = 0;
+  u32 m_height = 0;
+};
+
+}  // namespace Vulkan