Stub out Vulkan context for iPhone

platform/iphone/SCsub

@@ -14,6 +14,7 @@ iphone_lib = [
     'in_app_store.mm',
     'icloud.mm',
     'ios.mm',
+    'vulkan_context_iphone.mm',
 ]
 
 env_ios = env.Clone()

platform/iphone/os_iphone.h

@@ -79,6 +79,10 @@ private:
 
 	MainLoop *main_loop;
 
+#if defined(VULKAN_ENABLED)
+	VulkanContextIPhone *context_vulkan;
+	RenderingDeviceVulkan *rendering_device_vulkan;
+#endif
 	VideoMode video_mode;
 
 	virtual int get_video_driver_count() const;

platform/iphone/vulkan_context_iphone.h

@@ -0,0 +1,48 @@
+/*************************************************************************/
+/*  vulkan_context_osx.h                                                 */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#ifndef VULKAN_CONTEXT_IPHONE_H
+#define VULKAN_CONTEXT_IPHONE_H
+
+#include "drivers/vulkan/vulkan_context.h"
+// #import <UIKit/UIKit.h>
+
+class VulkanContextIPhone : public VulkanContext {
+
+	virtual const char *_get_platform_surface_extension() const;
+
+public:
+	int window_create(void *p_window, int p_width, int p_height);
+
+	VulkanContextIPhone();
+	~VulkanContextIPhone();
+};
+
+#endif // VULKAN_CONTEXT_IPHONE_H

platform/iphone/vulkan_context_iphone.mm

@@ -0,0 +1,56 @@
+/*************************************************************************/
+/*  vulkan_context_osx.mm                                                */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#include "vulkan_context_iphone.h"
+#include <vulkan/vulkan_ios.h>
+
+const char *VulkanContextIPhone::_get_platform_surface_extension() const {
+	return VK_MVK_IOS_SURFACE_EXTENSION_NAME;
+}
+
+int VulkanContextIPhone::window_create(void *p_window, int p_width, int p_height) {
+
+	VkIOSSurfaceCreateInfoMVK createInfo;
+	createInfo.sType = VK_STRUCTURE_TYPE_MACOS_SURFACE_CREATE_INFO_MVK;
+	createInfo.pNext = NULL;
+	createInfo.flags = 0;
+	createInfo.pView = p_window;
+
+	VkSurfaceKHR surface;
+	VkResult err = vkCreateIOSSurfaceMVK(_get_instance(), &createInfo, NULL, &surface);
+	ERR_FAIL_COND_V(err, -1);
+	return _window_create(surface, p_width, p_height);
+}
+
+VulkanContextIPhone::VulkanContextIPhone() {
+}
+
+VulkanContextIPhone::~VulkanContextIPhone() {
+}