Add Vulkan support for Mac (via MoltenVK)

Source/Engine/GraphicsDevice/Vulkan/Mac/MacVulkanPlatform.cpp

@@ -0,0 +1,23 @@
+// Copyright (c) 2012-2021 Wojciech Figat. All rights reserved.
+
+#if GRAPHICS_API_VULKAN && PLATFORM_MAC
+
+#include "MacVulkanPlatform.h"
+#include "../RenderToolsVulkan.h"
+#include <Cocoa/Cocoa.h>
+
+void MacVulkanPlatform::GetInstanceExtensions(Array<const char*>& extensions, Array<const char*>& layers)
+{
+	extensions.Add(VK_MVK_MACOS_SURFACE_EXTENSION_NAME);
+}
+
+void MacVulkanPlatform::CreateSurface(void* windowHandle, VkInstance instance, VkSurfaceKHR* surface)
+{
+    NSWindow* window = (NSWindow*)windowHandle;
+	VkMacOSSurfaceCreateInfoMVK surfaceCreateInfo;
+	RenderToolsVulkan::ZeroStruct(surfaceCreateInfo, VK_STRUCTURE_TYPE_MACOS_SURFACE_CREATE_INFO_MVK);
+	surfaceCreateInfo.pView = (void*)window.contentView;
+	VALIDATE_VULKAN_RESULT(vkCreateMacOSSurfaceMVK(instance, &surfaceCreateInfo, nullptr, surface));
+}
+
+#endif