Implement experimental Vulkan backend

Source/Core/VideoBackends/Vulkan/VertexFormat.h

@@ -0,0 +1,44 @@
+// Copyright 2016 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+
+#include "VideoBackends/Vulkan/Constants.h"
+#include "VideoCommon/NativeVertexFormat.h"
+
+namespace Vulkan
+{
+class VertexFormat : public ::NativeVertexFormat
+{
+public:
+  VertexFormat(const PortableVertexDeclaration& in_vtx_decl);
+
+  // Passed to pipeline state creation
+  const VkPipelineVertexInputStateCreateInfo& GetVertexInputStateInfo() const
+  {
+    return m_input_state_info;
+  }
+
+  // Converting PortableVertexDeclaration -> Vulkan types
+  void MapAttributes();
+  void SetupInputState();
+
+  // Not used in the Vulkan backend.
+  void SetupVertexPointers() override;
+
+private:
+  void AddAttribute(uint32_t location, uint32_t binding, VkFormat format, uint32_t offset);
+
+  VkVertexInputBindingDescription m_binding_description = {};
+
+  std::array<VkVertexInputAttributeDescription, MAX_VERTEX_ATTRIBUTES> m_attribute_descriptions =
+      {};
+
+  VkPipelineVertexInputStateCreateInfo m_input_state_info = {};
+
+  uint32_t m_num_attributes = 0;
+};
+}