dep/vulkan-loader: Add Vulkan headers and basic dynamic loader

dep/vulkan-loader/include/vulkan_loader.h

@@ -0,0 +1,79 @@
+// Copyright 2016 Dolphin Emulator Project
+// Copyright 2020 DuckStation Emulator Project
+// Licensed under GPLv2+
+// Refer to the LICENSE file included.
+
+#pragma once
+
+#define VK_NO_PROTOTYPES
+
+#if defined(WIN32)
+
+#define VK_USE_PLATFORM_WIN32_KHR
+
+// vulkan.h pulls in windows.h on Windows, so we need to include our replacement header first
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN 1
+#endif
+#ifndef NOMINMAX
+#define NOMINMAX 1
+#endif
+
+// require vista+
+#ifdef _WIN32_WINNT
+#undef _WIN32_WINNT
+#endif
+#define _WIN32_WINNT _WIN32_WINNT_VISTA
+
+#include <windows.h>
+
+#endif
+
+#if defined(VULKAN_USE_X11)
+#define VK_USE_PLATFORM_XLIB_KHR
+#endif
+
+#if defined(ANDROID)
+#define VK_USE_PLATFORM_ANDROID_KHR
+#endif
+
+#if defined(__APPLE__)
+#define VK_USE_PLATFORM_METAL_EXT
+#endif
+
+#include "vulkan/vulkan.h"
+
+// Currently, exclusive fullscreen is only supported on Windows.
+#if defined(WIN32)
+#define SUPPORTS_VULKAN_EXCLUSIVE_FULLSCREEN 1
+#endif
+
+#if defined(VULKAN_USE_X11)
+
+// This breaks a bunch of our code. They shouldn't be #defines in the first place.
+#ifdef None
+#undef None
+#endif
+#ifdef Status
+#undef Status
+#endif
+
+#endif
+
+// We abuse the preprocessor here to only need to specify function names once.
+#define VULKAN_MODULE_ENTRY_POINT(name, required) extern PFN_##name name;
+#define VULKAN_INSTANCE_ENTRY_POINT(name, required) extern PFN_##name name;
+#define VULKAN_DEVICE_ENTRY_POINT(name, required) extern PFN_##name name;
+#include "vulkan_entry_points.inl"
+#undef VULKAN_DEVICE_ENTRY_POINT
+#undef VULKAN_INSTANCE_ENTRY_POINT
+#undef VULKAN_MODULE_ENTRY_POINT
+
+namespace Vulkan {
+
+bool LoadVulkanLibrary();
+bool LoadVulkanInstanceFunctions(VkInstance instance);
+bool LoadVulkanDeviceFunctions(VkDevice device);
+void UnloadVulkanLibrary();
+
+} // namespace Vulkan