Implement experimental Vulkan backend

Source/Core/VideoBackends/Vulkan/Texture2D.h

@@ -0,0 +1,67 @@
+// Copyright 2016 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+
+#include "VideoBackends/Vulkan/Constants.h"
+
+namespace Vulkan
+{
+class CommandBufferManager;
+class ObjectCache;
+
+class Texture2D
+{
+public:
+  Texture2D(u32 width, u32 height, u32 levels, u32 layers, VkFormat format,
+            VkSampleCountFlagBits samples, VkImageViewType view_type, VkImage image,
+            VkDeviceMemory device_memory, VkImageView view);
+  ~Texture2D();
+
+  static std::unique_ptr<Texture2D> Create(u32 width, u32 height, u32 levels, u32 layers,
+                                           VkFormat format, VkSampleCountFlagBits samples,
+                                           VkImageViewType view_type, VkImageTiling tiling,
+                                           VkImageUsageFlags usage);
+
+  static std::unique_ptr<Texture2D> CreateFromExistingImage(u32 width, u32 height, u32 levels,
+                                                            u32 layers, VkFormat format,
+                                                            VkSampleCountFlagBits samples,
+                                                            VkImageViewType view_type,
+                                                            VkImage existing_image);
+
+  u32 GetWidth() const { return m_width; }
+  u32 GetHeight() const { return m_height; }
+  u32 GetLevels() const { return m_levels; }
+  u32 GetLayers() const { return m_layers; }
+  VkFormat GetFormat() const { return m_format; }
+  VkSampleCountFlagBits GetSamples() const { return m_samples; }
+  VkImageLayout GetLayout() const { return m_layout; }
+  VkImageViewType GetViewType() const { return m_view_type; }
+  VkImage GetImage() const { return m_image; }
+  VkDeviceMemory GetDeviceMemory() const { return m_device_memory; }
+  VkImageView GetView() const { return m_view; }
+  // Used when the render pass is changing the image layout, or to force it to
+  // VK_IMAGE_LAYOUT_UNDEFINED, if the existing contents of the image is
+  // irrelevant and will not be loaded.
+  void OverrideImageLayout(VkImageLayout new_layout);
+
+  void TransitionToLayout(VkCommandBuffer command_buffer, VkImageLayout new_layout);
+
+private:
+  u32 m_width;
+  u32 m_height;
+  u32 m_levels;
+  u32 m_layers;
+  VkFormat m_format;
+  VkSampleCountFlagBits m_samples;
+  VkImageViewType m_view_type;
+  VkImageLayout m_layout = VK_IMAGE_LAYOUT_UNDEFINED;
+
+  VkImage m_image;
+  VkDeviceMemory m_device_memory;
+  VkImageView m_view;
+};
+}