initial commit, 4.5 stable

modules/openxr/extensions/platform/openxr_android_extension.cpp

@@ -0,0 +1,114 @@
+/**************************************************************************/
+/*  openxr_android_extension.cpp                                          */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* 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 "openxr_android_extension.h"
+
+#include "../../openxr_api.h"
+
+#include "java_godot_wrapper.h"
+#include "os_android.h"
+#include "thread_jandroid.h"
+
+#include <openxr/openxr.h>
+#include <openxr/openxr_platform.h>
+
+OpenXRAndroidExtension *OpenXRAndroidExtension::singleton = nullptr;
+
+OpenXRAndroidExtension *OpenXRAndroidExtension::get_singleton() {
+	return singleton;
+}
+
+OpenXRAndroidExtension::OpenXRAndroidExtension() {
+	singleton = this;
+
+	JNIEnv *env = get_jni_env();
+	ERR_FAIL_NULL(env);
+
+	env->GetJavaVM(&vm);
+	activity_object = env->NewGlobalRef(static_cast<OS_Android *>(OS::get_singleton())->get_godot_java()->get_activity());
+}
+
+HashMap<String, bool *> OpenXRAndroidExtension::get_requested_extensions() {
+	HashMap<String, bool *> request_extensions;
+
+	// XR_KHR_LOADER_INIT_EXTENSION_NAME is a dependency of XR_KHR_LOADER_INIT_ANDROID_EXTENSION_NAME
+	request_extensions[XR_KHR_LOADER_INIT_EXTENSION_NAME] = &loader_init_extension_available;
+	request_extensions[XR_KHR_LOADER_INIT_ANDROID_EXTENSION_NAME] = &loader_init_android_extension_available;
+	request_extensions[XR_KHR_ANDROID_CREATE_INSTANCE_EXTENSION_NAME] = &create_instance_extension_available;
+
+	return request_extensions;
+}
+
+void OpenXRAndroidExtension::on_before_instance_created() {
+	if (XR_FAILED(EXT_TRY_INIT_XR_FUNC(xrInitializeLoaderKHR))) {
+		// XR_KHR_loader_init not supported on this platform
+		return;
+	}
+	loader_init_android_extension_available = true;
+
+	XrLoaderInitInfoAndroidKHR loader_init_info_android = {
+		.type = XR_TYPE_LOADER_INIT_INFO_ANDROID_KHR,
+		.next = nullptr,
+		.applicationVM = vm,
+		.applicationContext = activity_object
+	};
+	XrResult result = xrInitializeLoaderKHR((const XrLoaderInitInfoBaseHeaderKHR *)&loader_init_info_android);
+	ERR_FAIL_COND_MSG(XR_FAILED(result), "Failed to call xrInitializeLoaderKHR");
+}
+
+// We're keeping the Android create info struct here to avoid including openxr_platform.h in a header, which would break other extensions.
+// This is reasonably safe as the struct is only used during initialization and the extension is a singleton.
+static XrInstanceCreateInfoAndroidKHR instance_create_info;
+
+void *OpenXRAndroidExtension::set_instance_create_info_and_get_next_pointer(void *p_next_pointer) {
+	if (!create_instance_extension_available) {
+		if (!loader_init_android_extension_available) {
+			WARN_PRINT("No Android extensions available, couldn't pass JVM and Activity to OpenXR");
+		}
+		return nullptr;
+	}
+
+	instance_create_info = {
+		.type = XR_TYPE_INSTANCE_CREATE_INFO_ANDROID_KHR,
+		.next = p_next_pointer,
+		.applicationVM = vm,
+		.applicationActivity = activity_object
+	};
+	return &instance_create_info;
+}
+
+OpenXRAndroidExtension::~OpenXRAndroidExtension() {
+	singleton = nullptr;
+
+	JNIEnv *env = get_jni_env();
+	ERR_FAIL_NULL(env);
+
+	env->DeleteGlobalRef(activity_object);
+}

modules/openxr/extensions/platform/openxr_android_extension.h

@@ -0,0 +1,61 @@
+/**************************************************************************/
+/*  openxr_android_extension.h                                            */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* 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.                 */
+/**************************************************************************/
+
+#pragma once
+
+#include "../../util.h"
+#include "../openxr_extension_wrapper.h"
+
+#include <jni.h>
+
+class OpenXRAndroidExtension : public OpenXRExtensionWrapper {
+public:
+	static OpenXRAndroidExtension *get_singleton();
+
+	OpenXRAndroidExtension();
+
+	virtual HashMap<String, bool *> get_requested_extensions() override;
+	virtual void on_before_instance_created() override;
+	virtual void *set_instance_create_info_and_get_next_pointer(void *p_next_pointer) override;
+
+	virtual ~OpenXRAndroidExtension() override;
+
+private:
+	static OpenXRAndroidExtension *singleton;
+
+	JavaVM *vm;
+	jobject activity_object;
+	bool loader_init_extension_available = false;
+	bool loader_init_android_extension_available = false;
+	bool create_instance_extension_available = false;
+
+	// Initialize the loader
+	EXT_PROTO_XRRESULT_FUNC1(xrInitializeLoaderKHR, (const XrLoaderInitInfoBaseHeaderKHR *), loaderInitInfo)
+};

modules/openxr/extensions/platform/openxr_d3d12_extension.cpp

@@ -0,0 +1,451 @@
+/**************************************************************************/
+/*  openxr_d3d12_extension.cpp                                            */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* 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 "openxr_d3d12_extension.h"
+
+#ifdef D3D12_ENABLED
+
+#include "../../openxr_util.h"
+
+#include "servers/rendering/rendering_server_globals.h"
+#include "servers/rendering_server.h"
+
+HashMap<String, bool *> OpenXRD3D12Extension::get_requested_extensions() {
+	HashMap<String, bool *> request_extensions;
+
+	request_extensions[XR_KHR_D3D12_ENABLE_EXTENSION_NAME] = nullptr;
+
+	return request_extensions;
+}
+
+void OpenXRD3D12Extension::on_instance_created(const XrInstance p_instance) {
+	// Obtain pointers to functions we're accessing here.
+	ERR_FAIL_NULL(OpenXRAPI::get_singleton());
+
+	EXT_INIT_XR_FUNC(xrGetD3D12GraphicsRequirementsKHR);
+	EXT_INIT_XR_FUNC(xrEnumerateSwapchainImages);
+}
+
+D3D_FEATURE_LEVEL OpenXRD3D12Extension::get_feature_level() const {
+	XrGraphicsRequirementsD3D12KHR d3d12_requirements = {
+		XR_TYPE_GRAPHICS_REQUIREMENTS_D3D12_KHR, // type
+		nullptr, // next
+		{ 0, 0 }, // adapterLuid
+		(D3D_FEATURE_LEVEL)0 // minFeatureLevel
+	};
+
+	XrResult result = xrGetD3D12GraphicsRequirementsKHR(OpenXRAPI::get_singleton()->get_instance(), OpenXRAPI::get_singleton()->get_system_id(), &d3d12_requirements);
+	if (XR_FAILED(result)) {
+		print_line("OpenXR: Failed to get Direct3D 12 graphics requirements [", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+		return D3D_FEATURE_LEVEL_11_0; // Good default.
+	}
+
+	// #ifdef DEBUG
+	print_line("OpenXR: xrGetD3D12GraphicsRequirementsKHR:");
+	print_line(" - minFeatureLevel: ", (uint32_t)d3d12_requirements.minFeatureLevel);
+	// #endif
+
+	return d3d12_requirements.minFeatureLevel;
+}
+
+LUID OpenXRD3D12Extension::get_adapter_luid() const {
+	XrGraphicsRequirementsD3D12KHR d3d12_requirements = {
+		XR_TYPE_GRAPHICS_REQUIREMENTS_D3D12_KHR, // type
+		nullptr, // next
+		{ 0, 0 }, // adapterLuid
+		(D3D_FEATURE_LEVEL)0 // minFeatureLevel
+	};
+
+	XrResult result = xrGetD3D12GraphicsRequirementsKHR(OpenXRAPI::get_singleton()->get_instance(), OpenXRAPI::get_singleton()->get_system_id(), &d3d12_requirements);
+	if (XR_FAILED(result)) {
+		print_line("OpenXR: Failed to get Direct3D 12 graphics requirements [", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+		return {};
+	}
+
+	return d3d12_requirements.adapterLuid;
+}
+
+void OpenXRD3D12Extension::set_device(ID3D12Device *p_device) {
+	graphics_device = p_device;
+}
+
+void OpenXRD3D12Extension::set_command_queue(ID3D12CommandQueue *p_queue) {
+	command_queue = p_queue;
+}
+
+void OpenXRD3D12Extension::cleanup_device() {
+	command_queue.Reset();
+	graphics_device.Reset();
+}
+
+XrGraphicsBindingD3D12KHR OpenXRD3D12Extension::graphics_binding_d3d12;
+
+void *OpenXRD3D12Extension::set_session_create_and_get_next_pointer(void *p_next_pointer) {
+	DEV_ASSERT(graphics_device && "Graphics Device was not specified yet.");
+	DEV_ASSERT(command_queue && "Command queue was not specified yet.");
+
+	graphics_binding_d3d12.type = XR_TYPE_GRAPHICS_BINDING_D3D12_KHR,
+	graphics_binding_d3d12.next = p_next_pointer;
+	graphics_binding_d3d12.device = graphics_device.Get();
+	graphics_binding_d3d12.queue = command_queue.Get();
+
+	return &graphics_binding_d3d12;
+}
+
+void OpenXRD3D12Extension::get_usable_swapchain_formats(Vector<int64_t> &p_usable_swap_chains) {
+	p_usable_swap_chains.push_back(DXGI_FORMAT_R8G8B8A8_UNORM_SRGB);
+	p_usable_swap_chains.push_back(DXGI_FORMAT_B8G8R8A8_UNORM_SRGB);
+	p_usable_swap_chains.push_back(DXGI_FORMAT_R8G8B8A8_UNORM);
+	p_usable_swap_chains.push_back(DXGI_FORMAT_B8G8R8A8_UNORM);
+}
+
+void OpenXRD3D12Extension::get_usable_depth_formats(Vector<int64_t> &p_usable_depth_formats) {
+	p_usable_depth_formats.push_back(DXGI_FORMAT_D32_FLOAT);
+	p_usable_depth_formats.push_back(DXGI_FORMAT_D32_FLOAT_S8X24_UINT);
+	p_usable_depth_formats.push_back(DXGI_FORMAT_D24_UNORM_S8_UINT);
+	p_usable_depth_formats.push_back(DXGI_FORMAT_D16_UNORM);
+}
+
+bool OpenXRD3D12Extension::get_swapchain_image_data(XrSwapchain p_swapchain, int64_t p_swapchain_format, uint32_t p_width, uint32_t p_height, uint32_t p_sample_count, uint32_t p_array_size, void **r_swapchain_graphics_data) {
+	RenderingServer *rendering_server = RenderingServer::get_singleton();
+	ERR_FAIL_NULL_V(rendering_server, false);
+	RenderingDevice *rendering_device = rendering_server->get_rendering_device();
+	ERR_FAIL_NULL_V(rendering_device, false);
+
+	uint32_t swapchain_length;
+	XrResult result = xrEnumerateSwapchainImages(p_swapchain, 0, &swapchain_length, nullptr);
+	if (XR_FAILED(result)) {
+		print_line("OpenXR: Failed to get swapchain image count [", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+		return false;
+	}
+
+	LocalVector<XrSwapchainImageD3D12KHR> images;
+	images.resize(swapchain_length);
+
+	for (XrSwapchainImageD3D12KHR &image : images) {
+		image.type = XR_TYPE_SWAPCHAIN_IMAGE_D3D12_KHR;
+		image.next = nullptr;
+		image.texture = nullptr;
+	}
+
+	result = xrEnumerateSwapchainImages(p_swapchain, swapchain_length, &swapchain_length, (XrSwapchainImageBaseHeader *)images.ptr());
+	if (XR_FAILED(result)) {
+		print_line("OpenXR: Failed to get swapchain images [", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+		return false;
+	}
+
+	SwapchainGraphicsData *data = memnew(SwapchainGraphicsData);
+	if (data == nullptr) {
+		print_line("OpenXR: Failed to allocate memory for swapchain data");
+		return false;
+	}
+	*r_swapchain_graphics_data = data;
+	data->is_multiview = (p_array_size > 1);
+
+	RenderingDevice::DataFormat format = RenderingDevice::DATA_FORMAT_R8G8B8A8_SRGB;
+	RenderingDevice::TextureSamples samples = RenderingDevice::TEXTURE_SAMPLES_1;
+	uint64_t usage_flags = RenderingDevice::TEXTURE_USAGE_SAMPLING_BIT;
+
+	switch (p_swapchain_format) {
+		case DXGI_FORMAT_R8G8B8A8_UNORM_SRGB:
+			// Even though this is an sRGB framebuffer format we're using UNORM here.
+			// The reason here is because Godot does a linear to sRGB conversion while
+			// with the sRGB format, this conversion would be doubled by the hardware.
+			// This also means we're reading the values as is for our preview on screen.
+			// The OpenXR runtime however is still treating this as an sRGB format and
+			// will thus do an sRGB -> Linear conversion as expected.
+			//format = RenderingDevice::DATA_FORMAT_R8G8B8A8_SRGB;
+			format = RenderingDevice::DATA_FORMAT_R8G8B8A8_UNORM;
+			usage_flags |= RenderingDevice::TEXTURE_USAGE_COLOR_ATTACHMENT_BIT;
+			break;
+		case DXGI_FORMAT_B8G8R8A8_UNORM_SRGB:
+			//format = RenderingDevice::DATA_FORMAT_B8G8R8A8_SRGB;
+			format = RenderingDevice::DATA_FORMAT_B8G8R8A8_UNORM;
+			usage_flags |= RenderingDevice::TEXTURE_USAGE_COLOR_ATTACHMENT_BIT;
+			break;
+		case DXGI_FORMAT_R8G8B8A8_UNORM:
+			format = RenderingDevice::DATA_FORMAT_R8G8B8A8_UINT;
+			usage_flags |= RenderingDevice::TEXTURE_USAGE_COLOR_ATTACHMENT_BIT;
+			break;
+		case DXGI_FORMAT_B8G8R8A8_UNORM:
+			format = RenderingDevice::DATA_FORMAT_B8G8R8A8_UINT;
+			usage_flags |= RenderingDevice::TEXTURE_USAGE_COLOR_ATTACHMENT_BIT;
+			break;
+		case DXGI_FORMAT_D32_FLOAT:
+			format = RenderingDevice::DATA_FORMAT_D32_SFLOAT;
+			usage_flags |= RenderingDevice::TEXTURE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT;
+			break;
+		case DXGI_FORMAT_D32_FLOAT_S8X24_UINT:
+			format = RenderingDevice::DATA_FORMAT_D32_SFLOAT_S8_UINT;
+			usage_flags |= RenderingDevice::TEXTURE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT;
+			break;
+		case DXGI_FORMAT_D24_UNORM_S8_UINT:
+			format = RenderingDevice::DATA_FORMAT_D24_UNORM_S8_UINT;
+			usage_flags |= RenderingDevice::TEXTURE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT;
+			break;
+		case DXGI_FORMAT_D16_UNORM:
+			format = RenderingDevice::DATA_FORMAT_D16_UNORM;
+			usage_flags |= RenderingDevice::TEXTURE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT;
+			break;
+		default:
+			// continue with our default value
+			print_line("OpenXR: Unsupported swapchain format", p_swapchain_format);
+			break;
+	}
+
+	switch (p_sample_count) {
+		case 1:
+			samples = RenderingDevice::TEXTURE_SAMPLES_1;
+			break;
+		case 2:
+			samples = RenderingDevice::TEXTURE_SAMPLES_2;
+			break;
+		case 4:
+			samples = RenderingDevice::TEXTURE_SAMPLES_4;
+			break;
+		case 8:
+			samples = RenderingDevice::TEXTURE_SAMPLES_8;
+			break;
+		case 16:
+			samples = RenderingDevice::TEXTURE_SAMPLES_16;
+			break;
+		case 32:
+			samples = RenderingDevice::TEXTURE_SAMPLES_32;
+			break;
+		case 64:
+			samples = RenderingDevice::TEXTURE_SAMPLES_64;
+			break;
+		default:
+			// continue with our default value
+			print_line("OpenXR: Unsupported sample count", p_sample_count);
+			break;
+	}
+
+	Vector<RID> texture_rids;
+
+	for (const XrSwapchainImageD3D12KHR &swapchain_image : images) {
+		RID texture_rid = rendering_device->texture_create_from_extension(
+				p_array_size == 1 ? RenderingDevice::TEXTURE_TYPE_2D : RenderingDevice::TEXTURE_TYPE_2D_ARRAY,
+				format,
+				samples,
+				usage_flags,
+				(uint64_t)swapchain_image.texture,
+				p_width,
+				p_height,
+				1,
+				p_array_size,
+				1);
+
+		texture_rids.push_back(texture_rid);
+	}
+
+	data->texture_rids = texture_rids;
+
+	return true;
+}
+
+bool OpenXRD3D12Extension::create_projection_fov(const XrFovf p_fov, double p_z_near, double p_z_far, Projection &r_camera_matrix) {
+	OpenXRUtil::XrMatrix4x4f matrix;
+	OpenXRUtil::XrMatrix4x4f_CreateProjectionFov(&matrix, OpenXRUtil::GRAPHICS_D3D, p_fov, (float)p_z_near, (float)p_z_far);
+
+	for (int j = 0; j < 4; j++) {
+		for (int i = 0; i < 4; i++) {
+			r_camera_matrix.columns[j][i] = matrix.m[j * 4 + i];
+		}
+	}
+
+	return true;
+}
+
+RID OpenXRD3D12Extension::get_texture(void *p_swapchain_graphics_data, int p_image_index) {
+	SwapchainGraphicsData *data = (SwapchainGraphicsData *)p_swapchain_graphics_data;
+	ERR_FAIL_NULL_V(data, RID());
+
+	ERR_FAIL_INDEX_V(p_image_index, data->texture_rids.size(), RID());
+	return data->texture_rids[p_image_index];
+}
+
+void OpenXRD3D12Extension::cleanup_swapchain_graphics_data(void **p_swapchain_graphics_data) {
+	if (*p_swapchain_graphics_data == nullptr) {
+		return;
+	}
+
+	RenderingServer *rendering_server = RenderingServer::get_singleton();
+	ERR_FAIL_NULL(rendering_server);
+	RenderingDevice *rendering_device = rendering_server->get_rendering_device();
+	ERR_FAIL_NULL(rendering_device);
+
+	SwapchainGraphicsData *data = (SwapchainGraphicsData *)*p_swapchain_graphics_data;
+
+	for (const RID &texture_rid : data->texture_rids) {
+		// This should clean up our RIDs and associated texture objects but shouldn't destroy the images, they are owned by our XrSwapchain.
+		rendering_device->free(texture_rid);
+	}
+	data->texture_rids.clear();
+
+	memdelete(data);
+	*p_swapchain_graphics_data = nullptr;
+}
+
+#define ENUM_TO_STRING_CASE(e) \
+	case e: {                  \
+		return String(#e);     \
+	} break;
+
+String OpenXRD3D12Extension::get_swapchain_format_name(int64_t p_swapchain_format) const {
+	// These are somewhat different per platform, will need to weed some stuff out...
+	switch (p_swapchain_format) {
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_UNKNOWN)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R32G32B32A32_TYPELESS)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R32G32B32A32_FLOAT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R32G32B32A32_UINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R32G32B32A32_SINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R32G32B32_TYPELESS)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R32G32B32_FLOAT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R32G32B32_UINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R32G32B32_SINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R16G16B16A16_TYPELESS)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R16G16B16A16_FLOAT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R16G16B16A16_UNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R16G16B16A16_UINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R16G16B16A16_SNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R16G16B16A16_SINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R32G32_TYPELESS)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R32G32_FLOAT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R32G32_UINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R32G32_SINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R32G8X24_TYPELESS)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_D32_FLOAT_S8X24_UINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R32_FLOAT_X8X24_TYPELESS)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_X32_TYPELESS_G8X24_UINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R10G10B10A2_TYPELESS)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R10G10B10A2_UNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R10G10B10A2_UINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R11G11B10_FLOAT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R8G8B8A8_TYPELESS)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R8G8B8A8_UNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R8G8B8A8_UNORM_SRGB)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R8G8B8A8_UINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R8G8B8A8_SNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R8G8B8A8_SINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R16G16_TYPELESS)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R16G16_FLOAT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R16G16_UNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R16G16_UINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R16G16_SNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R16G16_SINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R32_TYPELESS)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_D32_FLOAT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R32_FLOAT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R32_UINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R32_SINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R24G8_TYPELESS)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_D24_UNORM_S8_UINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R24_UNORM_X8_TYPELESS)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_X24_TYPELESS_G8_UINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R8G8_TYPELESS)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R8G8_UNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R8G8_UINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R8G8_SNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R8G8_SINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R16_TYPELESS)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R16_FLOAT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_D16_UNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R16_UNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R16_UINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R16_SNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R16_SINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R8_TYPELESS)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R8_UNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R8_UINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R8_SNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R8_SINT)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_A8_UNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R1_UNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R9G9B9E5_SHAREDEXP)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R8G8_B8G8_UNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_G8R8_G8B8_UNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_BC1_TYPELESS)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_BC1_UNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_BC1_UNORM_SRGB)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_BC2_TYPELESS)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_BC2_UNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_BC2_UNORM_SRGB)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_BC3_TYPELESS)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_BC3_UNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_BC3_UNORM_SRGB)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_BC4_TYPELESS)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_BC4_UNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_BC4_SNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_BC5_TYPELESS)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_BC5_UNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_BC5_SNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_B5G6R5_UNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_B5G5R5A1_UNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_B8G8R8A8_UNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_B8G8R8X8_UNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_R10G10B10_XR_BIAS_A2_UNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_B8G8R8A8_TYPELESS)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_B8G8R8A8_UNORM_SRGB)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_B8G8R8X8_TYPELESS)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_B8G8R8X8_UNORM_SRGB)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_BC6H_TYPELESS)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_BC6H_UF16)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_BC6H_SF16)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_BC7_TYPELESS)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_BC7_UNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_BC7_UNORM_SRGB)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_AYUV)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_Y410)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_Y416)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_NV12)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_P010)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_P016)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_420_OPAQUE)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_YUY2)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_Y210)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_Y216)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_NV11)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_AI44)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_IA44)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_P8)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_A8P8)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_B4G4R4A4_UNORM)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_P208)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_V208)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_V408)
+		ENUM_TO_STRING_CASE(DXGI_FORMAT_A4B4G4R4_UNORM)
+		default: {
+			return String("Swapchain format ") + String::num_int64(int64_t(p_swapchain_format));
+		} break;
+	}
+}
+
+#endif // D3D12_ENABLED

modules/openxr/extensions/platform/openxr_d3d12_extension.h

@@ -0,0 +1,84 @@
+/**************************************************************************/
+/*  openxr_d3d12_extension.h                                              */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* 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.                 */
+/**************************************************************************/
+
+#pragma once
+
+#ifdef D3D12_ENABLED
+
+#include "../../openxr_api.h"
+#include "../../util.h"
+#include "../openxr_extension_wrapper.h"
+
+#include "core/templates/vector.h"
+#include "drivers/d3d12/d3d12_hooks.h"
+
+// Always include this as late as possible.
+#include "../../openxr_platform_inc.h"
+
+class OpenXRD3D12Extension : public OpenXRGraphicsExtensionWrapper, D3D12Hooks {
+public:
+	virtual HashMap<String, bool *> get_requested_extensions() override;
+
+	virtual void on_instance_created(const XrInstance p_instance) override;
+	virtual void *set_session_create_and_get_next_pointer(void *p_next_pointer) override;
+
+	virtual D3D_FEATURE_LEVEL get_feature_level() const override final;
+	virtual LUID get_adapter_luid() const override final;
+	virtual void set_device(ID3D12Device *p_device) override final;
+	virtual void set_command_queue(ID3D12CommandQueue *p_queue) override final;
+	virtual void cleanup_device() override final;
+
+	virtual void get_usable_swapchain_formats(Vector<int64_t> &p_usable_swap_chains) override;
+	virtual void get_usable_depth_formats(Vector<int64_t> &p_usable_swap_chains) override;
+	virtual String get_swapchain_format_name(int64_t p_swapchain_format) const override;
+	virtual bool get_swapchain_image_data(XrSwapchain p_swapchain, int64_t p_swapchain_format, uint32_t p_width, uint32_t p_height, uint32_t p_sample_count, uint32_t p_array_size, void **r_swapchain_graphics_data) override;
+	virtual void cleanup_swapchain_graphics_data(void **p_swapchain_graphics_data) override;
+	virtual bool create_projection_fov(const XrFovf p_fov, double p_z_near, double p_z_far, Projection &r_camera_matrix) override;
+	virtual RID get_texture(void *p_swapchain_graphics_data, int p_image_index) override;
+	virtual RID get_density_map(void *p_swapchain_graphics_data, int p_image_index) override { return RID(); }
+
+private:
+	static OpenXRD3D12Extension *singleton;
+
+	static XrGraphicsBindingD3D12KHR graphics_binding_d3d12;
+
+	struct SwapchainGraphicsData {
+		bool is_multiview;
+		Vector<RID> texture_rids;
+	};
+
+	EXT_PROTO_XRRESULT_FUNC3(xrGetD3D12GraphicsRequirementsKHR, (XrInstance), p_instance, (XrSystemId), p_system_id, (XrGraphicsRequirementsD3D12KHR *), p_graphics_requirements)
+	EXT_PROTO_XRRESULT_FUNC4(xrEnumerateSwapchainImages, (XrSwapchain), p_swapchain, (uint32_t), p_image_capacity_input, (uint32_t *), p_image_count_output, (XrSwapchainImageBaseHeader *), p_images)
+
+	ComPtr<ID3D12Device> graphics_device;
+	ComPtr<ID3D12CommandQueue> command_queue;
+};
+
+#endif // D3D12_ENABLED

modules/openxr/extensions/platform/openxr_metal_extension.h

@@ -0,0 +1,70 @@
+/**************************************************************************/
+/*  openxr_metal_extension.h                                              */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* 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.                 */
+/**************************************************************************/
+
+#pragma once
+
+#include "../../openxr_api.h"
+#include "../../util.h"
+#include "../openxr_extension_wrapper.h"
+
+#include "core/templates/vector.h"
+
+// Always include this as late as possible.
+#include "../../openxr_platform_inc.h"
+
+class OpenXRMetalExtension : public OpenXRGraphicsExtensionWrapper {
+public:
+	virtual HashMap<String, bool *> get_requested_extensions() override;
+
+	virtual void on_instance_created(const XrInstance p_instance) override;
+	virtual void *set_session_create_and_get_next_pointer(void *p_next_pointer) override;
+
+	virtual void get_usable_swapchain_formats(Vector<int64_t> &p_usable_swap_chains) override;
+	virtual void get_usable_depth_formats(Vector<int64_t> &p_usable_swap_chains) override;
+	virtual String get_swapchain_format_name(int64_t p_swapchain_format) const override;
+	virtual bool get_swapchain_image_data(XrSwapchain p_swapchain, int64_t p_swapchain_format, uint32_t p_width, uint32_t p_height, uint32_t p_sample_count, uint32_t p_array_size, void **r_swapchain_graphics_data) override;
+	virtual void cleanup_swapchain_graphics_data(void **p_swapchain_graphics_data) override;
+	virtual bool create_projection_fov(const XrFovf p_fov, double p_z_near, double p_z_far, Projection &r_camera_matrix) override;
+	virtual RID get_texture(void *p_swapchain_graphics_data, int p_image_index) override;
+	virtual RID get_density_map(void *p_swapchain_graphics_data, int p_image_index) override { return RID(); }
+
+private:
+	static XrGraphicsBindingMetalKHR graphics_binding_metal;
+
+	struct SwapchainGraphicsData {
+		bool is_multiview;
+		Vector<RID> texture_rids;
+	};
+
+	bool check_graphics_api_support();
+
+	EXT_PROTO_XRRESULT_FUNC3(xrGetMetalGraphicsRequirementsKHR, (XrInstance), p_instance, (XrSystemId), p_system_id, (XrGraphicsRequirementsMetalKHR *), p_graphics_requirements)
+	EXT_PROTO_XRRESULT_FUNC4(xrEnumerateSwapchainImages, (XrSwapchain), p_swapchain, (uint32_t), p_image_capacity_input, (uint32_t *), p_image_count_output, (XrSwapchainImageBaseHeader *), p_images)
+};

modules/openxr/extensions/platform/openxr_metal_extension.mm

@@ -0,0 +1,320 @@
+/**************************************************************************/
+/*  openxr_metal_extension.mm                                             */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* 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.                 */
+/**************************************************************************/
+
+#import "openxr_metal_extension.h"
+
+#include "../../openxr_util.h"
+
+#import "drivers/metal/rendering_device_driver_metal.h"
+#include "servers/rendering/rendering_server_globals.h"
+
+HashMap<String, bool *> OpenXRMetalExtension::get_requested_extensions() {
+	HashMap<String, bool *> request_extensions;
+
+	request_extensions[XR_KHR_METAL_ENABLE_EXTENSION_NAME] = nullptr;
+
+	return request_extensions;
+}
+
+void OpenXRMetalExtension::on_instance_created(const XrInstance p_instance) {
+	// Obtain pointers to functions we're accessing here.
+	ERR_FAIL_NULL(OpenXRAPI::get_singleton());
+
+	EXT_INIT_XR_FUNC(xrGetMetalGraphicsRequirementsKHR);
+	EXT_INIT_XR_FUNC(xrEnumerateSwapchainImages);
+}
+
+bool OpenXRMetalExtension::check_graphics_api_support() {
+	ERR_FAIL_NULL_V(OpenXRAPI::get_singleton(), false);
+
+	// TODO We may need to do a callback like we do in Vulkan where we run this first
+	// and provide the obtained metalDevice to our Metal driver to use.
+	// But according to Stuart Macs only have 1 device so it should always be the
+	// same one and we should be able to get away with not doing this just yet.
+	// If we do go forward with this, this means that just like with Vulkan,
+	// we have to start with OpenXR before Metal can be setup, and we thus
+	// can't support applications that want to add XR as an optional/temporary
+	// feature that users enable when needed.
+
+	XrSystemId system_id = OpenXRAPI::get_singleton()->get_system_id();
+	XrInstance instance = OpenXRAPI::get_singleton()->get_instance();
+
+	XrGraphicsRequirementsMetalKHR metal_requirements;
+	metal_requirements.type = XR_TYPE_GRAPHICS_REQUIREMENTS_METAL_KHR;
+	metal_requirements.next = nullptr;
+	metal_requirements.metalDevice = nullptr;
+
+	XrResult result = xrGetMetalGraphicsRequirementsKHR(instance, system_id, &metal_requirements);
+	if (!OpenXRAPI::get_singleton()->xr_result(result, "Failed to get Metal graphics requirements!")) {
+		return false;
+	}
+
+	// See what metal device we are using...
+	RenderingServer *rendering_server = RenderingServer::get_singleton();
+	ERR_FAIL_NULL_V(rendering_server, false);
+	RenderingDevice *rendering_device = rendering_server->get_rendering_device();
+	ERR_FAIL_NULL_V(rendering_device, false);
+
+	void *our_metal_device = (void *)rendering_device->get_driver_resource(RD::DRIVER_RESOURCE_LOGICAL_DEVICE);
+
+	// Make sure we're using the same one.
+	ERR_FAIL_COND_V(metal_requirements.metalDevice != our_metal_device, false);
+
+	return true;
+}
+
+XrGraphicsBindingMetalKHR OpenXRMetalExtension::graphics_binding_metal;
+
+void *OpenXRMetalExtension::set_session_create_and_get_next_pointer(void *p_next_pointer) {
+	if (!check_graphics_api_support()) {
+		return p_next_pointer;
+	}
+
+	RenderingServer *rendering_server = RenderingServer::get_singleton();
+	ERR_FAIL_NULL_V(rendering_server, p_next_pointer);
+	RenderingDevice *rendering_device = rendering_server->get_rendering_device();
+	ERR_FAIL_NULL_V(rendering_device, p_next_pointer);
+
+	graphics_binding_metal.type = XR_TYPE_GRAPHICS_BINDING_METAL_KHR;
+	graphics_binding_metal.next = p_next_pointer;
+	graphics_binding_metal.commandQueue = (void *)rendering_device->get_driver_resource(RD::DRIVER_RESOURCE_COMMAND_QUEUE);
+
+	return &graphics_binding_metal;
+}
+
+void OpenXRMetalExtension::get_usable_swapchain_formats(Vector<int64_t> &p_usable_swap_chains) {
+	p_usable_swap_chains.push_back(MTLPixelFormatRGBA8Unorm_sRGB);
+	p_usable_swap_chains.push_back(MTLPixelFormatBGRA8Unorm_sRGB);
+	p_usable_swap_chains.push_back(MTLPixelFormatRGBA8Uint);
+}
+
+void OpenXRMetalExtension::get_usable_depth_formats(Vector<int64_t> &p_usable_swap_chains) {
+	p_usable_swap_chains.push_back(MTLPixelFormatDepth24Unorm_Stencil8);
+	p_usable_swap_chains.push_back(MTLPixelFormatDepth32Float_Stencil8);
+	p_usable_swap_chains.push_back(MTLPixelFormatDepth32Float);
+}
+
+#define ENUM_TO_STRING_CASE(m_e) \
+	case m_e: {                  \
+		return String(#m_e);     \
+	} break;
+
+String OpenXRMetalExtension::get_swapchain_format_name(int64_t p_swapchain_format) const {
+	// This really should be in vulkan_context...
+	MTLPixelFormat format = MTLPixelFormat(p_swapchain_format);
+	switch (format) {
+		ENUM_TO_STRING_CASE(MTLPixelFormatRGBA8Unorm)
+		ENUM_TO_STRING_CASE(MTLPixelFormatRGBA8Unorm_sRGB)
+		ENUM_TO_STRING_CASE(MTLPixelFormatBGRA8Unorm)
+		ENUM_TO_STRING_CASE(MTLPixelFormatBGRA8Unorm_sRGB)
+		ENUM_TO_STRING_CASE(MTLPixelFormatRGBA8Uint)
+		ENUM_TO_STRING_CASE(MTLPixelFormatDepth24Unorm_Stencil8)
+		ENUM_TO_STRING_CASE(MTLPixelFormatDepth32Float_Stencil8)
+		ENUM_TO_STRING_CASE(MTLPixelFormatDepth32Float)
+		default: {
+			return String("Swapchain format ") + String::num_int64(int64_t(p_swapchain_format));
+		} break;
+	}
+}
+
+bool OpenXRMetalExtension::get_swapchain_image_data(XrSwapchain p_swapchain, int64_t p_swapchain_format, uint32_t p_width, uint32_t p_height, uint32_t p_sample_count, uint32_t p_array_size, void **r_swapchain_graphics_data) {
+	LocalVector<XrSwapchainImageMetalKHR, uint32_t, false, true> images;
+
+	RenderingServer *rendering_server = RenderingServer::get_singleton();
+	ERR_FAIL_NULL_V(rendering_server, false);
+	RenderingDevice *rendering_device = rendering_server->get_rendering_device();
+	ERR_FAIL_NULL_V(rendering_device, false);
+
+	uint32_t swapchain_length;
+	XrResult result = xrEnumerateSwapchainImages(p_swapchain, 0, &swapchain_length, nullptr);
+	if (XR_FAILED(result)) {
+		print_line("OpenXR: Failed to get swapchain image count [", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+		return false;
+	}
+
+	images.resize(swapchain_length);
+
+	for (XrSwapchainImageMetalKHR &image : images) {
+		image.type = XR_TYPE_SWAPCHAIN_IMAGE_METAL_KHR;
+		image.next = nullptr;
+		image.texture = nullptr;
+	}
+
+	result = xrEnumerateSwapchainImages(p_swapchain, swapchain_length, &swapchain_length, (XrSwapchainImageBaseHeader *)images.ptr());
+	if (XR_FAILED(result)) {
+		print_line("OpenXR: Failed to get swapchain images [", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+		return false;
+	}
+
+	SwapchainGraphicsData *data = memnew(SwapchainGraphicsData);
+	if (data == nullptr) {
+		print_line("OpenXR: Failed to allocate memory for swapchain data");
+		return false;
+	}
+	*r_swapchain_graphics_data = data;
+	data->is_multiview = (p_array_size > 1);
+
+	RenderingDevice::DataFormat format = RenderingDevice::DATA_FORMAT_R8G8B8A8_SRGB;
+	RenderingDevice::TextureSamples samples = RenderingDevice::TEXTURE_SAMPLES_1;
+	uint64_t usage_flags = RenderingDevice::TEXTURE_USAGE_SAMPLING_BIT;
+
+	switch (p_swapchain_format) {
+		case MTLPixelFormatRGBA8Unorm_sRGB:
+			// Even though this is an sRGB framebuffer format we're using UNORM here.
+			// The reason here is because Godot does a linear to sRGB conversion while
+			// with the sRGB format, this conversion would be doubled by the hardware.
+			// This also means we're reading the values as is for our preview on screen.
+			// The OpenXR runtime however is still treating this as an sRGB format and
+			// will thus do an sRGB -> Linear conversion as expected.
+			//format = RenderingDevice::DATA_FORMAT_R8G8B8A8_SRGB;
+			format = RenderingDevice::DATA_FORMAT_R8G8B8A8_UNORM;
+			usage_flags |= RenderingDevice::TEXTURE_USAGE_COLOR_ATTACHMENT_BIT;
+			break;
+		case MTLPixelFormatBGRA8Unorm_sRGB:
+			format = RenderingDevice::DATA_FORMAT_B8G8R8A8_UNORM;
+			usage_flags |= RenderingDevice::TEXTURE_USAGE_COLOR_ATTACHMENT_BIT;
+			break;
+		case MTLPixelFormatRGBA8Uint:
+			format = RenderingDevice::DATA_FORMAT_R8G8B8A8_UINT;
+			usage_flags |= RenderingDevice::TEXTURE_USAGE_COLOR_ATTACHMENT_BIT;
+			break;
+		case MTLPixelFormatDepth32Float:
+			format = RenderingDevice::DATA_FORMAT_D32_SFLOAT;
+			usage_flags |= RenderingDevice::TEXTURE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT;
+			break;
+		case MTLPixelFormatDepth24Unorm_Stencil8:
+			format = RenderingDevice::DATA_FORMAT_D24_UNORM_S8_UINT;
+			usage_flags |= RenderingDevice::TEXTURE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT;
+			break;
+		case MTLPixelFormatDepth32Float_Stencil8:
+			format = RenderingDevice::DATA_FORMAT_D32_SFLOAT_S8_UINT;
+			usage_flags |= RenderingDevice::TEXTURE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT;
+			break;
+		default:
+			// Continue with our default value.
+			print_line("OpenXR: Unsupported swapchain format", p_swapchain_format);
+			break;
+	}
+
+	switch (p_sample_count) {
+		case 1:
+			samples = RenderingDevice::TEXTURE_SAMPLES_1;
+			break;
+		case 2:
+			samples = RenderingDevice::TEXTURE_SAMPLES_2;
+			break;
+		case 4:
+			samples = RenderingDevice::TEXTURE_SAMPLES_4;
+			break;
+		case 8:
+			samples = RenderingDevice::TEXTURE_SAMPLES_8;
+			break;
+		case 16:
+			samples = RenderingDevice::TEXTURE_SAMPLES_16;
+			break;
+		case 32:
+			samples = RenderingDevice::TEXTURE_SAMPLES_32;
+			break;
+		case 64:
+			samples = RenderingDevice::TEXTURE_SAMPLES_64;
+			break;
+		default:
+			// Continue with our default value.
+			print_line("OpenXR: Unsupported sample count", p_sample_count);
+			break;
+	}
+
+	Vector<RID> texture_rids;
+
+	// Create Godot texture objects for each entry in our swapchain.
+	for (uint64_t i = 0; i < swapchain_length; i++) {
+		// Note, the formats we sent to render_device are ignored on metal.
+		RID image_rid = rendering_device->texture_create_from_extension(
+				p_array_size == 1 ? RenderingDevice::TEXTURE_TYPE_2D : RenderingDevice::TEXTURE_TYPE_2D_ARRAY,
+				format,
+				samples,
+				usage_flags,
+				(uint64_t)images[i].texture,
+				p_width,
+				p_height,
+				1,
+				p_array_size,
+				1);
+
+		texture_rids.push_back(image_rid);
+	}
+
+	data->texture_rids = texture_rids;
+
+	return true;
+}
+
+void OpenXRMetalExtension::cleanup_swapchain_graphics_data(void **p_swapchain_graphics_data) {
+	if (*p_swapchain_graphics_data == nullptr) {
+		return;
+	}
+
+	SwapchainGraphicsData *data = (SwapchainGraphicsData *)*p_swapchain_graphics_data;
+
+	RenderingServer *rendering_server = RenderingServer::get_singleton();
+	ERR_FAIL_NULL(rendering_server);
+	RenderingDevice *rendering_device = rendering_server->get_rendering_device();
+	ERR_FAIL_NULL(rendering_device);
+
+	for (const RID &texture_rid : data->texture_rids) {
+		rendering_device->free(texture_rid);
+	}
+	data->texture_rids.clear();
+
+	memdelete(data);
+	*p_swapchain_graphics_data = nullptr;
+}
+
+bool OpenXRMetalExtension::create_projection_fov(const XrFovf p_fov, double p_z_near, double p_z_far, Projection &r_camera_matrix) {
+	// Even though this is a Metal renderer we're using OpenGL coordinate systems.
+	OpenXRUtil::XrMatrix4x4f matrix;
+	OpenXRUtil::XrMatrix4x4f_CreateProjectionFov(&matrix, OpenXRUtil::GRAPHICS_OPENGL, p_fov, (float)p_z_near, (float)p_z_far);
+
+	for (int j = 0; j < 4; j++) {
+		for (int i = 0; i < 4; i++) {
+			r_camera_matrix.columns[j][i] = matrix.m[j * 4 + i];
+		}
+	}
+
+	return true;
+}
+
+RID OpenXRMetalExtension::get_texture(void *p_swapchain_graphics_data, int p_image_index) {
+	SwapchainGraphicsData *data = (SwapchainGraphicsData *)p_swapchain_graphics_data;
+	ERR_FAIL_NULL_V(data, RID());
+
+	ERR_FAIL_INDEX_V(p_image_index, data->texture_rids.size(), RID());
+	return data->texture_rids[p_image_index];
+}

modules/openxr/extensions/platform/openxr_opengl_extension.cpp

@@ -0,0 +1,466 @@
+/**************************************************************************/
+/*  openxr_opengl_extension.cpp                                           */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* 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 "openxr_opengl_extension.h"
+
+#ifdef GLES3_ENABLED
+
+#include "../../openxr_util.h"
+
+#include "drivers/gles3/effects/copy_effects.h"
+#include "drivers/gles3/storage/texture_storage.h"
+#include "servers/rendering/rendering_server_globals.h"
+#include "servers/rendering_server.h"
+
+// OpenXR requires us to submit sRGB textures so that it recognizes the content
+// as being in sRGB color space. We do fall back on "normal" textures but this
+// will likely result in incorrect colors as OpenXR will double the sRGB conversion.
+// All major XR runtimes support sRGB textures.
+
+// In OpenGL output of the fragment shader is assumed to be in the color space of
+// the developers choice, however a linear to sRGB HW conversion can be enabled
+// through enabling GL_FRAMEBUFFER_SRGB if an sRGB color attachment is used.
+// This is a global setting.
+// See: https://www.khronos.org/opengl/wiki/Framebuffer
+
+// In OpenGLES output of the fragment shader is assumed to be in linear color space
+// and will be converted by default to sRGB if an sRGB color attachment is used.
+// The extension GL_EXT_sRGB_write_control was introduced to enable turning this
+// feature off.
+// See: https://registry.khronos.org/OpenGL/extensions/EXT/EXT_sRGB_write_control.txt
+
+HashMap<String, bool *> OpenXROpenGLExtension::get_requested_extensions() {
+	HashMap<String, bool *> request_extensions;
+
+#ifdef ANDROID_ENABLED
+	request_extensions[XR_KHR_OPENGL_ES_ENABLE_EXTENSION_NAME] = nullptr;
+#else
+	request_extensions[XR_KHR_OPENGL_ENABLE_EXTENSION_NAME] = nullptr;
+#endif
+#if defined(LINUXBSD_ENABLED) && defined(EGL_ENABLED) && defined(WAYLAND_ENABLED)
+	request_extensions[XR_MNDX_EGL_ENABLE_EXTENSION_NAME] = &egl_extension_enabled;
+#endif
+
+	return request_extensions;
+}
+
+void OpenXROpenGLExtension::on_instance_created(const XrInstance p_instance) {
+	// Obtain pointers to functions we're accessing here.
+	ERR_FAIL_NULL(OpenXRAPI::get_singleton());
+
+#ifdef ANDROID_ENABLED
+	EXT_INIT_XR_FUNC(xrGetOpenGLESGraphicsRequirementsKHR);
+#else
+	EXT_INIT_XR_FUNC(xrGetOpenGLGraphicsRequirementsKHR);
+#endif
+	EXT_INIT_XR_FUNC(xrEnumerateSwapchainImages);
+}
+
+bool OpenXROpenGLExtension::check_graphics_api_support(XrVersion p_desired_version) {
+	ERR_FAIL_NULL_V(OpenXRAPI::get_singleton(), false);
+
+	XrSystemId system_id = OpenXRAPI::get_singleton()->get_system_id();
+	XrInstance instance = OpenXRAPI::get_singleton()->get_instance();
+
+#ifdef ANDROID_ENABLED
+	XrGraphicsRequirementsOpenGLESKHR opengl_requirements;
+	opengl_requirements.type = XR_TYPE_GRAPHICS_REQUIREMENTS_OPENGL_ES_KHR;
+	opengl_requirements.next = nullptr;
+
+	XrResult result = xrGetOpenGLESGraphicsRequirementsKHR(instance, system_id, &opengl_requirements);
+	if (!OpenXRAPI::get_singleton()->xr_result(result, "Failed to get OpenGL graphics requirements!")) {
+		return false;
+	}
+#else
+	XrGraphicsRequirementsOpenGLKHR opengl_requirements;
+	opengl_requirements.type = XR_TYPE_GRAPHICS_REQUIREMENTS_OPENGL_KHR;
+	opengl_requirements.next = nullptr;
+
+	XrResult result = xrGetOpenGLGraphicsRequirementsKHR(instance, system_id, &opengl_requirements);
+	if (!OpenXRAPI::get_singleton()->xr_result(result, "Failed to get OpenGL graphics requirements!")) {
+		return false;
+	}
+#endif
+
+	if (p_desired_version < opengl_requirements.minApiVersionSupported) {
+		print_line("OpenXR: Requested OpenGL version does not meet the minimum version this runtime supports.");
+		print_line("- desired_version ", OpenXRUtil::make_xr_version_string(p_desired_version));
+		print_line("- minApiVersionSupported ", OpenXRUtil::make_xr_version_string(opengl_requirements.minApiVersionSupported));
+		print_line("- maxApiVersionSupported ", OpenXRUtil::make_xr_version_string(opengl_requirements.maxApiVersionSupported));
+		return false;
+	}
+
+	if (p_desired_version > opengl_requirements.maxApiVersionSupported) {
+		print_line("OpenXR: Requested OpenGL version exceeds the maximum version this runtime has been tested on and is known to support.");
+		print_line("- desired_version ", OpenXRUtil::make_xr_version_string(p_desired_version));
+		print_line("- minApiVersionSupported ", OpenXRUtil::make_xr_version_string(opengl_requirements.minApiVersionSupported));
+		print_line("- maxApiVersionSupported ", OpenXRUtil::make_xr_version_string(opengl_requirements.maxApiVersionSupported));
+	}
+
+	return true;
+}
+
+#ifdef WIN32
+XrGraphicsBindingOpenGLWin32KHR OpenXROpenGLExtension::graphics_binding_gl;
+#elif defined(ANDROID_ENABLED)
+XrGraphicsBindingOpenGLESAndroidKHR OpenXROpenGLExtension::graphics_binding_gl;
+#elif defined(LINUXBSD_ENABLED)
+#ifdef X11_ENABLED
+XrGraphicsBindingOpenGLXlibKHR OpenXROpenGLExtension::graphics_binding_gl;
+#endif
+#if defined(EGL_ENABLED) && defined(WAYLAND_ENABLED)
+XrGraphicsBindingEGLMNDX OpenXROpenGLExtension::graphics_binding_egl;
+#endif
+#endif
+
+void *OpenXROpenGLExtension::set_session_create_and_get_next_pointer(void *p_next_pointer) {
+	GLint gl_version_major = 0;
+	GLint gl_version_minor = 0;
+	glGetIntegerv(GL_MAJOR_VERSION, &gl_version_major);
+	glGetIntegerv(GL_MINOR_VERSION, &gl_version_minor);
+
+	XrVersion desired_version = XR_MAKE_VERSION(gl_version_major, gl_version_minor, 0);
+
+	if (!check_graphics_api_support(desired_version)) {
+		print_line("OpenXR: Trying to initialize with OpenGL anyway...");
+		//return p_next_pointer;
+	}
+
+	DisplayServer *display_server = DisplayServer::get_singleton();
+
+#ifdef WIN32
+	graphics_binding_gl.type = XR_TYPE_GRAPHICS_BINDING_OPENGL_WIN32_KHR,
+	graphics_binding_gl.next = p_next_pointer;
+
+	graphics_binding_gl.hDC = (HDC)display_server->window_get_native_handle(DisplayServer::WINDOW_VIEW);
+	graphics_binding_gl.hGLRC = (HGLRC)display_server->window_get_native_handle(DisplayServer::OPENGL_CONTEXT);
+#elif defined(ANDROID_ENABLED)
+	graphics_binding_gl.type = XR_TYPE_GRAPHICS_BINDING_OPENGL_ES_ANDROID_KHR;
+	graphics_binding_gl.next = p_next_pointer;
+
+	graphics_binding_gl.display = (void *)display_server->window_get_native_handle(DisplayServer::DISPLAY_HANDLE);
+	graphics_binding_gl.config = (EGLConfig)0; // https://github.com/KhronosGroup/OpenXR-SDK-Source/blob/master/src/tests/hello_xr/graphicsplugin_opengles.cpp#L122
+	graphics_binding_gl.context = (void *)display_server->window_get_native_handle(DisplayServer::OPENGL_CONTEXT);
+#else
+#if defined(EGL_ENABLED) && defined(WAYLAND_ENABLED)
+	if (display_server->get_name() == "Wayland") {
+		ERR_FAIL_COND_V_MSG(!egl_extension_enabled, p_next_pointer, "OpenXR cannot initialize on Wayland without the XR_MNDX_egl_enable extension.");
+
+		graphics_binding_egl.type = XR_TYPE_GRAPHICS_BINDING_EGL_MNDX;
+		graphics_binding_egl.next = p_next_pointer;
+
+		graphics_binding_egl.getProcAddress = eglGetProcAddress;
+		graphics_binding_egl.display = (void *)display_server->window_get_native_handle(DisplayServer::EGL_DISPLAY);
+		graphics_binding_egl.config = (void *)display_server->window_get_native_handle(DisplayServer::EGL_CONFIG);
+		graphics_binding_egl.context = (void *)display_server->window_get_native_handle(DisplayServer::OPENGL_CONTEXT);
+
+		return &graphics_binding_egl;
+	}
+#endif
+#if defined(X11_ENABLED)
+	graphics_binding_gl.type = XR_TYPE_GRAPHICS_BINDING_OPENGL_XLIB_KHR;
+	graphics_binding_gl.next = p_next_pointer;
+
+	void *display_handle = (void *)display_server->window_get_native_handle(DisplayServer::DISPLAY_HANDLE);
+	void *glxcontext_handle = (void *)display_server->window_get_native_handle(DisplayServer::OPENGL_CONTEXT);
+	void *glxdrawable_handle = (void *)display_server->window_get_native_handle(DisplayServer::WINDOW_HANDLE);
+
+	graphics_binding_gl.xDisplay = (Display *)display_handle;
+	graphics_binding_gl.glxContext = (GLXContext)glxcontext_handle;
+	graphics_binding_gl.glxDrawable = (GLXDrawable)glxdrawable_handle;
+
+	// spec says to use proper values but runtimes don't care
+	graphics_binding_gl.visualid = 0;
+	graphics_binding_gl.glxFBConfig = nullptr;
+#endif
+#endif
+
+#if defined(WIN32) || defined(ANDROID_ENABLED) || defined(X11_ENABLED)
+	return &graphics_binding_gl;
+#else
+	return p_next_pointer;
+#endif
+}
+
+void OpenXROpenGLExtension::get_usable_swapchain_formats(Vector<int64_t> &p_usable_swap_chains) {
+	p_usable_swap_chains.push_back(GL_SRGB8_ALPHA8);
+	p_usable_swap_chains.push_back(GL_RGBA8);
+}
+
+void OpenXROpenGLExtension::get_usable_depth_formats(Vector<int64_t> &p_usable_depth_formats) {
+	p_usable_depth_formats.push_back(GL_DEPTH_COMPONENT32F);
+	p_usable_depth_formats.push_back(GL_DEPTH24_STENCIL8);
+	p_usable_depth_formats.push_back(GL_DEPTH32F_STENCIL8);
+	p_usable_depth_formats.push_back(GL_DEPTH_COMPONENT24);
+}
+
+bool OpenXROpenGLExtension::get_swapchain_image_data(XrSwapchain p_swapchain, int64_t p_swapchain_format, uint32_t p_width, uint32_t p_height, uint32_t p_sample_count, uint32_t p_array_size, void **r_swapchain_graphics_data) {
+	GLES3::TextureStorage *texture_storage = GLES3::TextureStorage::get_singleton();
+	ERR_FAIL_NULL_V(texture_storage, false);
+
+	uint32_t swapchain_length;
+	XrResult result = xrEnumerateSwapchainImages(p_swapchain, 0, &swapchain_length, nullptr);
+	if (XR_FAILED(result)) {
+		print_line("OpenXR: Failed to get swapchain image count [", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+		return false;
+	}
+
+#ifdef ANDROID_ENABLED
+	LocalVector<XrSwapchainImageOpenGLESKHR> images;
+#else
+	LocalVector<XrSwapchainImageOpenGLKHR> images;
+#endif
+	images.resize(swapchain_length);
+
+#ifdef ANDROID_ENABLED
+	for (XrSwapchainImageOpenGLESKHR &image : images) {
+		image.type = XR_TYPE_SWAPCHAIN_IMAGE_OPENGL_ES_KHR;
+#else
+	for (XrSwapchainImageOpenGLKHR &image : images) {
+		image.type = XR_TYPE_SWAPCHAIN_IMAGE_OPENGL_KHR;
+#endif
+		image.next = nullptr;
+		image.image = 0;
+	}
+
+	result = xrEnumerateSwapchainImages(p_swapchain, swapchain_length, &swapchain_length, (XrSwapchainImageBaseHeader *)images.ptr());
+	if (XR_FAILED(result)) {
+		print_line("OpenXR: Failed to get swapchain images [", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+		return false;
+	}
+
+	SwapchainGraphicsData *data = memnew(SwapchainGraphicsData);
+	if (data == nullptr) {
+		print_line("OpenXR: Failed to allocate memory for swapchain data");
+		return false;
+	}
+	*r_swapchain_graphics_data = data;
+	data->is_multiview = (p_array_size > 1);
+
+	Image::Format format = Image::FORMAT_RGBA8;
+
+	Vector<RID> texture_rids;
+
+	for (uint64_t i = 0; i < swapchain_length; i++) {
+		RID texture_rid = texture_storage->texture_create_from_native_handle(
+				p_array_size == 1 ? RS::TEXTURE_TYPE_2D : RS::TEXTURE_TYPE_LAYERED,
+				format,
+				images[i].image,
+				p_width,
+				p_height,
+				1,
+				p_array_size);
+
+		texture_rids.push_back(texture_rid);
+	}
+
+	data->texture_rids = texture_rids;
+
+	return true;
+}
+
+bool OpenXROpenGLExtension::create_projection_fov(const XrFovf p_fov, double p_z_near, double p_z_far, Projection &r_camera_matrix) {
+	OpenXRUtil::XrMatrix4x4f matrix;
+	OpenXRUtil::XrMatrix4x4f_CreateProjectionFov(&matrix, OpenXRUtil::GRAPHICS_OPENGL, p_fov, (float)p_z_near, (float)p_z_far);
+
+	for (int j = 0; j < 4; j++) {
+		for (int i = 0; i < 4; i++) {
+			r_camera_matrix.columns[j][i] = matrix.m[j * 4 + i];
+		}
+	}
+
+	return true;
+}
+
+RID OpenXROpenGLExtension::get_texture(void *p_swapchain_graphics_data, int p_image_index) {
+	SwapchainGraphicsData *data = (SwapchainGraphicsData *)p_swapchain_graphics_data;
+	ERR_FAIL_NULL_V(data, RID());
+
+	ERR_FAIL_INDEX_V(p_image_index, data->texture_rids.size(), RID());
+	return data->texture_rids[p_image_index];
+}
+
+void OpenXROpenGLExtension::cleanup_swapchain_graphics_data(void **p_swapchain_graphics_data) {
+	if (*p_swapchain_graphics_data == nullptr) {
+		return;
+	}
+
+	GLES3::TextureStorage *texture_storage = GLES3::TextureStorage::get_singleton();
+	ERR_FAIL_NULL(texture_storage);
+
+	SwapchainGraphicsData *data = (SwapchainGraphicsData *)*p_swapchain_graphics_data;
+
+	for (const RID &texture_rid : data->texture_rids) {
+		texture_storage->texture_free(texture_rid);
+	}
+	data->texture_rids.clear();
+
+	memdelete(data);
+	*p_swapchain_graphics_data = nullptr;
+}
+
+#define ENUM_TO_STRING_CASE(e) \
+	case e: {                  \
+		return String(#e);     \
+	} break;
+
+String OpenXROpenGLExtension::get_swapchain_format_name(int64_t p_swapchain_format) const {
+	// These are somewhat different per platform, will need to weed some stuff out...
+	switch (p_swapchain_format) {
+#ifdef ANDROID_ENABLED
+		// using definitions from GLES3/gl3.h
+
+		ENUM_TO_STRING_CASE(GL_RGBA4)
+		ENUM_TO_STRING_CASE(GL_RGB5_A1)
+		ENUM_TO_STRING_CASE(GL_RGB565)
+		ENUM_TO_STRING_CASE(GL_RGB8)
+		ENUM_TO_STRING_CASE(GL_RGBA8)
+		ENUM_TO_STRING_CASE(GL_RGB10_A2)
+		ENUM_TO_STRING_CASE(GL_RGBA32F)
+		ENUM_TO_STRING_CASE(GL_RGB32F)
+		ENUM_TO_STRING_CASE(GL_RGBA16F)
+		ENUM_TO_STRING_CASE(GL_RGB16F)
+		ENUM_TO_STRING_CASE(GL_R11F_G11F_B10F)
+		ENUM_TO_STRING_CASE(GL_UNSIGNED_INT_10F_11F_11F_REV)
+		ENUM_TO_STRING_CASE(GL_RGB9_E5)
+		ENUM_TO_STRING_CASE(GL_UNSIGNED_INT_5_9_9_9_REV)
+		ENUM_TO_STRING_CASE(GL_RGBA32UI)
+		ENUM_TO_STRING_CASE(GL_RGB32UI)
+		ENUM_TO_STRING_CASE(GL_RGBA16UI)
+		ENUM_TO_STRING_CASE(GL_RGB16UI)
+		ENUM_TO_STRING_CASE(GL_RGBA8UI)
+		ENUM_TO_STRING_CASE(GL_RGB8UI)
+		ENUM_TO_STRING_CASE(GL_RGBA32I)
+		ENUM_TO_STRING_CASE(GL_RGB32I)
+		ENUM_TO_STRING_CASE(GL_RGBA16I)
+		ENUM_TO_STRING_CASE(GL_RGB16I)
+		ENUM_TO_STRING_CASE(GL_RGBA8I)
+		ENUM_TO_STRING_CASE(GL_RGB8I)
+		ENUM_TO_STRING_CASE(GL_RG)
+		ENUM_TO_STRING_CASE(GL_RG_INTEGER)
+		ENUM_TO_STRING_CASE(GL_R8)
+		ENUM_TO_STRING_CASE(GL_RG8)
+		ENUM_TO_STRING_CASE(GL_R16F)
+		ENUM_TO_STRING_CASE(GL_R32F)
+		ENUM_TO_STRING_CASE(GL_RG16F)
+		ENUM_TO_STRING_CASE(GL_RG32F)
+		ENUM_TO_STRING_CASE(GL_R8I)
+		ENUM_TO_STRING_CASE(GL_R8UI)
+		ENUM_TO_STRING_CASE(GL_R16I)
+		ENUM_TO_STRING_CASE(GL_R16UI)
+		ENUM_TO_STRING_CASE(GL_R32I)
+		ENUM_TO_STRING_CASE(GL_R32UI)
+		ENUM_TO_STRING_CASE(GL_RG8I)
+		ENUM_TO_STRING_CASE(GL_RG8UI)
+		ENUM_TO_STRING_CASE(GL_RG16I)
+		ENUM_TO_STRING_CASE(GL_RG16UI)
+		ENUM_TO_STRING_CASE(GL_RG32I)
+		ENUM_TO_STRING_CASE(GL_RG32UI)
+		ENUM_TO_STRING_CASE(GL_R8_SNORM)
+		ENUM_TO_STRING_CASE(GL_RG8_SNORM)
+		ENUM_TO_STRING_CASE(GL_RGB8_SNORM)
+		ENUM_TO_STRING_CASE(GL_RGBA8_SNORM)
+		ENUM_TO_STRING_CASE(GL_RGB10_A2UI)
+		ENUM_TO_STRING_CASE(GL_SRGB)
+		ENUM_TO_STRING_CASE(GL_SRGB8)
+		ENUM_TO_STRING_CASE(GL_SRGB8_ALPHA8)
+		ENUM_TO_STRING_CASE(GL_COMPRESSED_R11_EAC)
+		ENUM_TO_STRING_CASE(GL_COMPRESSED_SIGNED_R11_EAC)
+		ENUM_TO_STRING_CASE(GL_COMPRESSED_RG11_EAC)
+		ENUM_TO_STRING_CASE(GL_COMPRESSED_SIGNED_RG11_EAC)
+		ENUM_TO_STRING_CASE(GL_COMPRESSED_RGB8_ETC2)
+		ENUM_TO_STRING_CASE(GL_COMPRESSED_SRGB8_ETC2)
+		ENUM_TO_STRING_CASE(GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2)
+		ENUM_TO_STRING_CASE(GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2)
+		ENUM_TO_STRING_CASE(GL_COMPRESSED_RGBA8_ETC2_EAC)
+		ENUM_TO_STRING_CASE(GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC)
+		ENUM_TO_STRING_CASE(GL_DEPTH_COMPONENT16)
+		ENUM_TO_STRING_CASE(GL_DEPTH_COMPONENT24)
+		ENUM_TO_STRING_CASE(GL_DEPTH24_STENCIL8)
+
+#else
+		// using definitions from GLAD
+		ENUM_TO_STRING_CASE(GL_R8_SNORM)
+		ENUM_TO_STRING_CASE(GL_RG8_SNORM)
+		ENUM_TO_STRING_CASE(GL_RGB8_SNORM)
+		ENUM_TO_STRING_CASE(GL_RGBA8_SNORM)
+		ENUM_TO_STRING_CASE(GL_R16_SNORM)
+		ENUM_TO_STRING_CASE(GL_RG16_SNORM)
+		ENUM_TO_STRING_CASE(GL_RGB16_SNORM)
+		ENUM_TO_STRING_CASE(GL_RGBA16_SNORM)
+		ENUM_TO_STRING_CASE(GL_RGB4)
+		ENUM_TO_STRING_CASE(GL_RGB5)
+		ENUM_TO_STRING_CASE(GL_RGB8)
+		ENUM_TO_STRING_CASE(GL_RGB10)
+		ENUM_TO_STRING_CASE(GL_RGB12)
+		ENUM_TO_STRING_CASE(GL_RGB16)
+		ENUM_TO_STRING_CASE(GL_RGBA2)
+		ENUM_TO_STRING_CASE(GL_RGBA4)
+		ENUM_TO_STRING_CASE(GL_RGB5_A1)
+		ENUM_TO_STRING_CASE(GL_RGBA8)
+		ENUM_TO_STRING_CASE(GL_RGB10_A2)
+		ENUM_TO_STRING_CASE(GL_RGBA12)
+		ENUM_TO_STRING_CASE(GL_RGBA16)
+		ENUM_TO_STRING_CASE(GL_RGBA32F)
+		ENUM_TO_STRING_CASE(GL_RGB32F)
+		ENUM_TO_STRING_CASE(GL_RGBA16F)
+		ENUM_TO_STRING_CASE(GL_RGB16F)
+		ENUM_TO_STRING_CASE(GL_RGBA32UI)
+		ENUM_TO_STRING_CASE(GL_RGB32UI)
+		ENUM_TO_STRING_CASE(GL_RGBA16UI)
+		ENUM_TO_STRING_CASE(GL_RGB16UI)
+		ENUM_TO_STRING_CASE(GL_RGBA8UI)
+		ENUM_TO_STRING_CASE(GL_RGB8UI)
+		ENUM_TO_STRING_CASE(GL_RGBA32I)
+		ENUM_TO_STRING_CASE(GL_RGB32I)
+		ENUM_TO_STRING_CASE(GL_RGBA16I)
+		ENUM_TO_STRING_CASE(GL_RGB16I)
+		ENUM_TO_STRING_CASE(GL_RGBA8I)
+		ENUM_TO_STRING_CASE(GL_RGB8I)
+		ENUM_TO_STRING_CASE(GL_RGB10_A2UI)
+		ENUM_TO_STRING_CASE(GL_SRGB)
+		ENUM_TO_STRING_CASE(GL_SRGB8)
+		ENUM_TO_STRING_CASE(GL_SRGB_ALPHA)
+		ENUM_TO_STRING_CASE(GL_SRGB8_ALPHA8)
+		ENUM_TO_STRING_CASE(GL_DEPTH_COMPONENT16)
+		ENUM_TO_STRING_CASE(GL_DEPTH_COMPONENT24)
+		ENUM_TO_STRING_CASE(GL_DEPTH_COMPONENT32)
+		ENUM_TO_STRING_CASE(GL_DEPTH24_STENCIL8)
+		ENUM_TO_STRING_CASE(GL_R11F_G11F_B10F)
+		ENUM_TO_STRING_CASE(GL_DEPTH_COMPONENT32F)
+		ENUM_TO_STRING_CASE(GL_DEPTH32F_STENCIL8)
+#endif
+		default: {
+			return String("Swapchain format 0x") + String::num_int64(p_swapchain_format, 16);
+		} break;
+	}
+}
+
+#endif // GLES3_ENABLED

modules/openxr/extensions/platform/openxr_opengl_extension.h

@@ -0,0 +1,95 @@
+/**************************************************************************/
+/*  openxr_opengl_extension.h                                             */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* 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.                 */
+/**************************************************************************/
+
+#pragma once
+
+#ifdef GLES3_ENABLED
+
+#include "../../openxr_api.h"
+#include "../../util.h"
+#include "../openxr_extension_wrapper.h"
+
+#include "core/templates/vector.h"
+
+// Always include this as late as possible.
+#include "../../openxr_platform_inc.h"
+
+class OpenXROpenGLExtension : public OpenXRGraphicsExtensionWrapper {
+public:
+	virtual HashMap<String, bool *> get_requested_extensions() override;
+
+	virtual void on_instance_created(const XrInstance p_instance) override;
+	virtual void *set_session_create_and_get_next_pointer(void *p_next_pointer) override;
+
+	virtual void get_usable_swapchain_formats(Vector<int64_t> &p_usable_swap_chains) override;
+	virtual void get_usable_depth_formats(Vector<int64_t> &p_usable_swap_chains) override;
+	virtual String get_swapchain_format_name(int64_t p_swapchain_format) const override;
+	virtual bool get_swapchain_image_data(XrSwapchain p_swapchain, int64_t p_swapchain_format, uint32_t p_width, uint32_t p_height, uint32_t p_sample_count, uint32_t p_array_size, void **r_swapchain_graphics_data) override;
+	virtual void cleanup_swapchain_graphics_data(void **p_swapchain_graphics_data) override;
+	virtual bool create_projection_fov(const XrFovf p_fov, double p_z_near, double p_z_far, Projection &r_camera_matrix) override;
+	virtual RID get_texture(void *p_swapchain_graphics_data, int p_image_index) override;
+	virtual RID get_density_map(void *p_swapchain_graphics_data, int p_image_index) override { return RID(); }
+
+private:
+	static OpenXROpenGLExtension *singleton;
+
+#ifdef WIN32
+	static XrGraphicsBindingOpenGLWin32KHR graphics_binding_gl;
+#elif defined(ANDROID_ENABLED)
+	static XrGraphicsBindingOpenGLESAndroidKHR graphics_binding_gl;
+#elif defined(LINUXBSD_ENABLED)
+#ifdef X11_ENABLED
+	static XrGraphicsBindingOpenGLXlibKHR graphics_binding_gl;
+#endif
+#if defined(EGL_ENABLED) && defined(WAYLAND_ENABLED)
+	static XrGraphicsBindingEGLMNDX graphics_binding_egl;
+
+	bool egl_extension_enabled = false;
+#endif
+#else
+#error "OpenXR with OpenGL isn't supported on this platform"
+#endif
+
+	struct SwapchainGraphicsData {
+		bool is_multiview;
+		Vector<RID> texture_rids;
+	};
+
+	bool check_graphics_api_support(XrVersion p_desired_version);
+
+#ifdef ANDROID_ENABLED
+	EXT_PROTO_XRRESULT_FUNC3(xrGetOpenGLESGraphicsRequirementsKHR, (XrInstance), p_instance, (XrSystemId), p_system_id, (XrGraphicsRequirementsOpenGLESKHR *), p_graphics_requirements)
+#else
+	EXT_PROTO_XRRESULT_FUNC3(xrGetOpenGLGraphicsRequirementsKHR, (XrInstance), p_instance, (XrSystemId), p_system_id, (XrGraphicsRequirementsOpenGLKHR *), p_graphics_requirements)
+#endif
+	EXT_PROTO_XRRESULT_FUNC4(xrEnumerateSwapchainImages, (XrSwapchain), p_swapchain, (uint32_t), p_image_capacity_input, (uint32_t *), p_image_count_output, (XrSwapchainImageBaseHeader *), p_images)
+};
+
+#endif // GLES3_ENABLED

modules/openxr/extensions/platform/openxr_vulkan_extension.cpp

@@ -0,0 +1,739 @@
+/**************************************************************************/
+/*  openxr_vulkan_extension.cpp                                           */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* 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 "openxr_vulkan_extension.h"
+
+#include "../../openxr_util.h"
+#include "../openxr_fb_foveation_extension.h"
+
+#include "core/string/print_string.h"
+#include "servers/rendering/renderer_rd/effects/copy_effects.h"
+#include "servers/rendering/renderer_rd/storage_rd/texture_storage.h"
+#include "servers/rendering/rendering_server_globals.h"
+#include "servers/rendering_server.h"
+
+HashMap<String, bool *> OpenXRVulkanExtension::get_requested_extensions() {
+	HashMap<String, bool *> request_extensions;
+
+	request_extensions[XR_KHR_VULKAN_ENABLE2_EXTENSION_NAME] = nullptr; // must be available
+
+	return request_extensions;
+}
+
+void OpenXRVulkanExtension::on_instance_created(const XrInstance p_instance) {
+	ERR_FAIL_NULL(OpenXRAPI::get_singleton());
+
+	// Obtain pointers to functions we're accessing here, they are (not yet) part of core.
+
+	EXT_INIT_XR_FUNC(xrGetVulkanGraphicsRequirements2KHR);
+	EXT_INIT_XR_FUNC(xrCreateVulkanInstanceKHR);
+	EXT_INIT_XR_FUNC(xrGetVulkanGraphicsDevice2KHR);
+	EXT_INIT_XR_FUNC(xrCreateVulkanDeviceKHR);
+	EXT_INIT_XR_FUNC(xrEnumerateSwapchainImages);
+}
+
+bool OpenXRVulkanExtension::check_graphics_api_support(XrVersion p_desired_version) {
+	ERR_FAIL_NULL_V(OpenXRAPI::get_singleton(), false);
+
+	XrGraphicsRequirementsVulkan2KHR vulkan_requirements = {
+		XR_TYPE_GRAPHICS_REQUIREMENTS_VULKAN2_KHR, // type
+		nullptr, // next
+		0, // minApiVersionSupported
+		0 // maxApiVersionSupported
+	};
+
+	XrResult result = xrGetVulkanGraphicsRequirements2KHR(OpenXRAPI::get_singleton()->get_instance(), OpenXRAPI::get_singleton()->get_system_id(), &vulkan_requirements);
+	if (XR_FAILED(result)) {
+		print_line("OpenXR: Failed to get Vulkan graphics requirements [", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+		return false;
+	}
+
+	// #ifdef DEBUG
+	print_line("OpenXR: XrGraphicsRequirementsVulkan2KHR:");
+	print_line(" - minApiVersionSupported: ", OpenXRUtil::make_xr_version_string(vulkan_requirements.minApiVersionSupported));
+	print_line(" - maxApiVersionSupported: ", OpenXRUtil::make_xr_version_string(vulkan_requirements.maxApiVersionSupported));
+	// #endif
+
+	if (p_desired_version < vulkan_requirements.minApiVersionSupported) {
+		print_line("OpenXR: Requested Vulkan version does not meet the minimum version this runtime supports.");
+		print_line("- desired_version ", OpenXRUtil::make_xr_version_string(p_desired_version));
+		print_line("- minApiVersionSupported ", OpenXRUtil::make_xr_version_string(vulkan_requirements.minApiVersionSupported));
+		print_line("- maxApiVersionSupported ", OpenXRUtil::make_xr_version_string(vulkan_requirements.maxApiVersionSupported));
+		return false;
+	}
+
+	if (p_desired_version > vulkan_requirements.maxApiVersionSupported) {
+		print_line("OpenXR: Requested Vulkan version exceeds the maximum version this runtime has been tested on and is known to support.");
+		print_line("- desired_version ", OpenXRUtil::make_xr_version_string(p_desired_version));
+		print_line("- minApiVersionSupported ", OpenXRUtil::make_xr_version_string(vulkan_requirements.minApiVersionSupported));
+		print_line("- maxApiVersionSupported ", OpenXRUtil::make_xr_version_string(vulkan_requirements.maxApiVersionSupported));
+	}
+
+	return true;
+}
+
+bool OpenXRVulkanExtension::create_vulkan_instance(const VkInstanceCreateInfo *p_vulkan_create_info, VkInstance *r_instance) {
+	// get the vulkan version we are creating
+	uint32_t vulkan_version = p_vulkan_create_info->pApplicationInfo->apiVersion;
+	uint32_t major_version = VK_VERSION_MAJOR(vulkan_version);
+	uint32_t minor_version = VK_VERSION_MINOR(vulkan_version);
+	uint32_t patch_version = VK_VERSION_PATCH(vulkan_version);
+	XrVersion desired_version = XR_MAKE_VERSION(major_version, minor_version, patch_version);
+
+	// check if this is supported
+	if (!check_graphics_api_support(desired_version)) {
+		return false;
+	}
+
+	XrVulkanInstanceCreateInfoKHR xr_vulkan_instance_info = {
+		XR_TYPE_VULKAN_INSTANCE_CREATE_INFO_KHR, // type
+		nullptr, // next
+		OpenXRAPI::get_singleton()->get_system_id(), // systemId
+		0, // createFlags
+		vkGetInstanceProcAddr, // pfnGetInstanceProcAddr
+		p_vulkan_create_info, // vulkanCreateInfo
+		nullptr, // vulkanAllocator
+	};
+
+	VkResult vk_result = VK_SUCCESS;
+	XrResult result = xrCreateVulkanInstanceKHR(OpenXRAPI::get_singleton()->get_instance(), &xr_vulkan_instance_info, &vulkan_instance, &vk_result);
+	if (XR_FAILED(result)) {
+		print_line("OpenXR: Failed to create Vulkan instance [", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+		return false;
+	}
+
+	ERR_FAIL_COND_V_MSG(vk_result == VK_ERROR_INCOMPATIBLE_DRIVER, false,
+			"Cannot find a compatible Vulkan installable client driver (ICD).\n\n"
+			"vkCreateInstance Failure");
+	ERR_FAIL_COND_V_MSG(vk_result == VK_ERROR_EXTENSION_NOT_PRESENT, false,
+			"Cannot find a specified extension library.\n"
+			"Make sure your layers path is set appropriately.\n"
+			"vkCreateInstance Failure");
+	ERR_FAIL_COND_V_MSG(vk_result, false,
+			"vkCreateInstance failed.\n\n"
+			"Do you have a compatible Vulkan installable client driver (ICD) installed?\n"
+			"Please look at the Getting Started guide for additional information.\n"
+			"vkCreateInstance Failure");
+
+	*r_instance = vulkan_instance;
+
+	return true;
+}
+
+bool OpenXRVulkanExtension::get_physical_device(VkPhysicalDevice *r_device) {
+	ERR_FAIL_NULL_V(OpenXRAPI::get_singleton(), false);
+
+	XrVulkanGraphicsDeviceGetInfoKHR get_info = {
+		XR_TYPE_VULKAN_GRAPHICS_DEVICE_GET_INFO_KHR, // type
+		nullptr, // next
+		OpenXRAPI::get_singleton()->get_system_id(), // systemId
+		vulkan_instance, // vulkanInstance
+	};
+
+	XrResult result = xrGetVulkanGraphicsDevice2KHR(OpenXRAPI::get_singleton()->get_instance(), &get_info, &vulkan_physical_device);
+	if (XR_FAILED(result)) {
+		print_line("OpenXR: Failed to obtain Vulkan physical device [", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+		return false;
+	}
+
+	*r_device = vulkan_physical_device;
+
+	return true;
+}
+
+bool OpenXRVulkanExtension::create_vulkan_device(const VkDeviceCreateInfo *p_device_create_info, VkDevice *r_device) {
+	ERR_FAIL_NULL_V(OpenXRAPI::get_singleton(), false);
+
+	XrVulkanDeviceCreateInfoKHR create_info = {
+		XR_TYPE_VULKAN_DEVICE_CREATE_INFO_KHR, // type
+		nullptr, // next
+		OpenXRAPI::get_singleton()->get_system_id(), // systemId
+		0, // createFlags
+		vkGetInstanceProcAddr, // pfnGetInstanceProcAddr
+		vulkan_physical_device, // vulkanPhysicalDevice
+		p_device_create_info, // vulkanCreateInfo
+		nullptr // vulkanAllocator
+	};
+
+	VkResult vk_result = VK_SUCCESS;
+	XrResult result = xrCreateVulkanDeviceKHR(OpenXRAPI::get_singleton()->get_instance(), &create_info, &vulkan_device, &vk_result);
+	if (XR_FAILED(result)) {
+		print_line("OpenXR: Failed to create Vulkan device [", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+		return false;
+	}
+
+	if (vk_result != VK_SUCCESS) {
+		print_line("OpenXR: Failed to create Vulkan device [Vulkan error", vk_result, "]");
+	}
+
+	*r_device = vulkan_device;
+
+	return true;
+}
+
+void OpenXRVulkanExtension::set_direct_queue_family_and_index(uint32_t p_queue_family_index, uint32_t p_queue_index) {
+	vulkan_queue_family_index = p_queue_family_index;
+	vulkan_queue_index = p_queue_index;
+}
+
+XrGraphicsBindingVulkanKHR OpenXRVulkanExtension::graphics_binding_vulkan;
+
+void *OpenXRVulkanExtension::set_session_create_and_get_next_pointer(void *p_next_pointer) {
+	DEV_ASSERT(vulkan_queue_family_index < UINT32_MAX && "Direct queue family index was not specified yet.");
+	DEV_ASSERT(vulkan_queue_index < UINT32_MAX && "Direct queue index was not specified yet.");
+
+	graphics_binding_vulkan.type = XR_TYPE_GRAPHICS_BINDING_VULKAN_KHR;
+	graphics_binding_vulkan.next = p_next_pointer;
+	graphics_binding_vulkan.instance = vulkan_instance;
+	graphics_binding_vulkan.physicalDevice = vulkan_physical_device;
+	graphics_binding_vulkan.device = vulkan_device;
+	graphics_binding_vulkan.queueFamilyIndex = vulkan_queue_family_index;
+	graphics_binding_vulkan.queueIndex = vulkan_queue_index;
+
+	return &graphics_binding_vulkan;
+}
+
+void OpenXRVulkanExtension::get_usable_swapchain_formats(Vector<int64_t> &p_usable_swap_chains) {
+	// We might want to do more here especially if we keep things in linear color space
+	// Possibly add in R10G10B10A2 as an option if we're using the mobile renderer.
+	p_usable_swap_chains.push_back(VK_FORMAT_R8G8B8A8_SRGB);
+	p_usable_swap_chains.push_back(VK_FORMAT_B8G8R8A8_SRGB);
+	p_usable_swap_chains.push_back(VK_FORMAT_R8G8B8A8_UINT);
+	p_usable_swap_chains.push_back(VK_FORMAT_B8G8R8A8_UINT);
+}
+
+void OpenXRVulkanExtension::get_usable_depth_formats(Vector<int64_t> &p_usable_swap_chains) {
+	// Note, it is very likely we do NOT support any of depth formats where we can combine our stencil support (e.g. _S8_UINT).
+	// Right now this isn't a problem but once stencil support becomes an issue, we need to check for this in the rendering engine
+	// and create a separate buffer for the stencil.
+
+	p_usable_swap_chains.push_back(VK_FORMAT_D24_UNORM_S8_UINT);
+	p_usable_swap_chains.push_back(VK_FORMAT_D32_SFLOAT_S8_UINT);
+	p_usable_swap_chains.push_back(VK_FORMAT_D32_SFLOAT);
+}
+
+bool OpenXRVulkanExtension::get_swapchain_image_data(XrSwapchain p_swapchain, int64_t p_swapchain_format, uint32_t p_width, uint32_t p_height, uint32_t p_sample_count, uint32_t p_array_size, void **r_swapchain_graphics_data) {
+	LocalVector<XrSwapchainImageVulkanKHR> images;
+	LocalVector<XrSwapchainImageFoveationVulkanFB> density_images;
+
+	RenderingServer *rendering_server = RenderingServer::get_singleton();
+	ERR_FAIL_NULL_V(rendering_server, false);
+	RenderingDevice *rendering_device = rendering_server->get_rendering_device();
+	ERR_FAIL_NULL_V(rendering_device, false);
+
+	uint32_t swapchain_length;
+	XrResult result = xrEnumerateSwapchainImages(p_swapchain, 0, &swapchain_length, nullptr);
+	if (XR_FAILED(result)) {
+		print_line("OpenXR: Failed to get swapchain image count [", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+		return false;
+	}
+
+	images.resize(swapchain_length);
+
+	for (XrSwapchainImageVulkanKHR &image : images) {
+		image.type = XR_TYPE_SWAPCHAIN_IMAGE_VULKAN_KHR;
+		image.next = nullptr;
+		image.image = VK_NULL_HANDLE;
+	}
+
+	if (OpenXRFBFoveationExtension::get_singleton()->is_enabled()) {
+		density_images.resize(swapchain_length);
+
+		for (uint64_t i = 0; i < swapchain_length; i++) {
+			density_images[i].type = XR_TYPE_SWAPCHAIN_IMAGE_FOVEATION_VULKAN_FB;
+			density_images[i].next = nullptr;
+			density_images[i].image = VK_NULL_HANDLE;
+			density_images[i].width = 0;
+			density_images[i].height = 0;
+
+			images[i].next = &density_images[i];
+		}
+	}
+
+	result = xrEnumerateSwapchainImages(p_swapchain, swapchain_length, &swapchain_length, (XrSwapchainImageBaseHeader *)images.ptr());
+	if (XR_FAILED(result)) {
+		print_line("OpenXR: Failed to get swapchain images [", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+		return false;
+	}
+
+	SwapchainGraphicsData *data = memnew(SwapchainGraphicsData);
+	if (data == nullptr) {
+		print_line("OpenXR: Failed to allocate memory for swapchain data");
+		return false;
+	}
+	*r_swapchain_graphics_data = data;
+	data->is_multiview = (p_array_size > 1);
+
+	RenderingDevice::DataFormat format = RenderingDevice::DATA_FORMAT_R8G8B8A8_SRGB;
+	RenderingDevice::TextureSamples samples = RenderingDevice::TEXTURE_SAMPLES_1;
+	uint64_t usage_flags = RenderingDevice::TEXTURE_USAGE_SAMPLING_BIT;
+
+	switch (p_swapchain_format) {
+		case VK_FORMAT_R8G8B8A8_SRGB:
+			// Even though this is an sRGB framebuffer format we're using UNORM here.
+			// The reason here is because Godot does a linear to sRGB conversion while
+			// with the sRGB format, this conversion would be doubled by the hardware.
+			// This also means we're reading the values as is for our preview on screen.
+			// The OpenXR runtime however is still treating this as an sRGB format and
+			// will thus do an sRGB -> Linear conversion as expected.
+			//format = RenderingDevice::DATA_FORMAT_R8G8B8A8_SRGB;
+			format = RenderingDevice::DATA_FORMAT_R8G8B8A8_UNORM;
+			usage_flags |= RenderingDevice::TEXTURE_USAGE_COLOR_ATTACHMENT_BIT;
+			break;
+		case VK_FORMAT_B8G8R8A8_SRGB:
+			//format = RenderingDevice::DATA_FORMAT_B8G8R8A8_SRGB;
+			format = RenderingDevice::DATA_FORMAT_B8G8R8A8_UNORM;
+			usage_flags |= RenderingDevice::TEXTURE_USAGE_COLOR_ATTACHMENT_BIT;
+			break;
+		case VK_FORMAT_R8G8B8A8_UINT:
+			format = RenderingDevice::DATA_FORMAT_R8G8B8A8_UINT;
+			usage_flags |= RenderingDevice::TEXTURE_USAGE_COLOR_ATTACHMENT_BIT;
+			break;
+		case VK_FORMAT_B8G8R8A8_UINT:
+			format = RenderingDevice::DATA_FORMAT_B8G8R8A8_UINT;
+			usage_flags |= RenderingDevice::TEXTURE_USAGE_COLOR_ATTACHMENT_BIT;
+			break;
+		case VK_FORMAT_R16G16B16A16_SFLOAT:
+			format = RenderingDevice::DATA_FORMAT_R16G16B16A16_SFLOAT;
+			usage_flags |= RenderingDevice::TEXTURE_USAGE_COLOR_ATTACHMENT_BIT;
+			break;
+		case VK_FORMAT_D32_SFLOAT:
+			format = RenderingDevice::DATA_FORMAT_D32_SFLOAT;
+			usage_flags |= RenderingDevice::TEXTURE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT;
+			break;
+		case VK_FORMAT_D24_UNORM_S8_UINT:
+			format = RenderingDevice::DATA_FORMAT_D24_UNORM_S8_UINT;
+			usage_flags |= RenderingDevice::TEXTURE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT;
+			break;
+		case VK_FORMAT_D32_SFLOAT_S8_UINT:
+			format = RenderingDevice::DATA_FORMAT_D32_SFLOAT_S8_UINT;
+			usage_flags |= RenderingDevice::TEXTURE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT;
+			break;
+		default:
+			// continue with our default value
+			print_line("OpenXR: Unsupported swapchain format", p_swapchain_format);
+			break;
+	}
+
+	switch (p_sample_count) {
+		case 1:
+			samples = RenderingDevice::TEXTURE_SAMPLES_1;
+			break;
+		case 2:
+			samples = RenderingDevice::TEXTURE_SAMPLES_2;
+			break;
+		case 4:
+			samples = RenderingDevice::TEXTURE_SAMPLES_4;
+			break;
+		case 8:
+			samples = RenderingDevice::TEXTURE_SAMPLES_8;
+			break;
+		case 16:
+			samples = RenderingDevice::TEXTURE_SAMPLES_16;
+			break;
+		case 32:
+			samples = RenderingDevice::TEXTURE_SAMPLES_32;
+			break;
+		case 64:
+			samples = RenderingDevice::TEXTURE_SAMPLES_64;
+			break;
+		default:
+			// continue with our default value
+			print_line("OpenXR: Unsupported sample count", p_sample_count);
+			break;
+	}
+
+	Vector<RID> texture_rids;
+	Vector<RID> density_map_rids;
+
+	// create Godot texture objects for each entry in our swapchain
+	for (uint32_t i = 0; i < swapchain_length; i++) {
+		const XrSwapchainImageVulkanKHR &swapchain_image = images[i];
+
+		RID image_rid = rendering_device->texture_create_from_extension(
+				p_array_size == 1 ? RenderingDevice::TEXTURE_TYPE_2D : RenderingDevice::TEXTURE_TYPE_2D_ARRAY,
+				format,
+				samples,
+				usage_flags,
+				(uint64_t)swapchain_image.image,
+				p_width,
+				p_height,
+				1,
+				p_array_size,
+				1);
+
+		texture_rids.push_back(image_rid);
+
+		if (OpenXRFBFoveationExtension::get_singleton()->is_enabled() && density_images[i].image != VK_NULL_HANDLE) {
+			RID density_map_rid = rendering_device->texture_create_from_extension(
+					p_array_size == 1 ? RenderingDevice::TEXTURE_TYPE_2D : RenderingDevice::TEXTURE_TYPE_2D_ARRAY,
+					RD::DATA_FORMAT_R8G8_UNORM,
+					RenderingDevice::TEXTURE_SAMPLES_1,
+					RD::TEXTURE_USAGE_COLOR_ATTACHMENT_BIT | RD::TEXTURE_USAGE_SAMPLING_BIT | RD::TEXTURE_USAGE_STORAGE_BIT | RD::TEXTURE_USAGE_VRS_ATTACHMENT_BIT,
+					(uint64_t)density_images[i].image,
+					density_images[i].width,
+					density_images[i].height,
+					1,
+					p_array_size,
+					1);
+
+			density_map_rids.push_back(density_map_rid);
+		} else {
+			density_map_rids.push_back(RID());
+		}
+	}
+
+	data->texture_rids = texture_rids;
+	data->density_map_rids = density_map_rids;
+
+	return true;
+}
+
+bool OpenXRVulkanExtension::create_projection_fov(const XrFovf p_fov, double p_z_near, double p_z_far, Projection &r_camera_matrix) {
+	// Even though this is a Vulkan renderer we're using OpenGL coordinate systems.
+	OpenXRUtil::XrMatrix4x4f matrix;
+	OpenXRUtil::XrMatrix4x4f_CreateProjectionFov(&matrix, OpenXRUtil::GRAPHICS_OPENGL, p_fov, (float)p_z_near, (float)p_z_far);
+
+	for (int j = 0; j < 4; j++) {
+		for (int i = 0; i < 4; i++) {
+			r_camera_matrix.columns[j][i] = matrix.m[j * 4 + i];
+		}
+	}
+
+	return true;
+}
+
+RID OpenXRVulkanExtension::get_texture(void *p_swapchain_graphics_data, int p_image_index) {
+	SwapchainGraphicsData *data = (SwapchainGraphicsData *)p_swapchain_graphics_data;
+	ERR_FAIL_NULL_V(data, RID());
+
+	ERR_FAIL_INDEX_V(p_image_index, data->texture_rids.size(), RID());
+	return data->texture_rids[p_image_index];
+}
+
+RID OpenXRVulkanExtension::get_density_map(void *p_swapchain_graphics_data, int p_image_index) {
+	SwapchainGraphicsData *data = (SwapchainGraphicsData *)p_swapchain_graphics_data;
+	ERR_FAIL_NULL_V(data, RID());
+
+	ERR_FAIL_INDEX_V(p_image_index, data->density_map_rids.size(), RID());
+	return data->density_map_rids[p_image_index];
+}
+
+void OpenXRVulkanExtension::cleanup_swapchain_graphics_data(void **p_swapchain_graphics_data) {
+	if (*p_swapchain_graphics_data == nullptr) {
+		return;
+	}
+
+	SwapchainGraphicsData *data = (SwapchainGraphicsData *)*p_swapchain_graphics_data;
+
+	RenderingServer *rendering_server = RenderingServer::get_singleton();
+	ERR_FAIL_NULL(rendering_server);
+	RenderingDevice *rendering_device = rendering_server->get_rendering_device();
+	ERR_FAIL_NULL(rendering_device);
+
+	for (const RID &texture_rid : data->texture_rids) {
+		// This should clean up our RIDs and associated texture objects but shouldn't destroy the images, they are owned by our XrSwapchain.
+		rendering_device->free(texture_rid);
+	}
+	data->texture_rids.clear();
+
+	for (int i = 0; i < data->density_map_rids.size(); i++) {
+		if (data->density_map_rids[i].is_valid()) {
+			rendering_device->free(data->density_map_rids[i]);
+		}
+	}
+	data->density_map_rids.clear();
+
+	memdelete(data);
+	*p_swapchain_graphics_data = nullptr;
+}
+
+#define ENUM_TO_STRING_CASE(e) \
+	case e: {                  \
+		return String(#e);     \
+	} break;
+
+String OpenXRVulkanExtension::get_swapchain_format_name(int64_t p_swapchain_format) const {
+	// This really should be in vulkan_context...
+	VkFormat format = VkFormat(p_swapchain_format);
+	switch (format) {
+		ENUM_TO_STRING_CASE(VK_FORMAT_UNDEFINED)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R4G4_UNORM_PACK8)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R4G4B4A4_UNORM_PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_B4G4R4A4_UNORM_PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R5G6B5_UNORM_PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_B5G6R5_UNORM_PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R5G5B5A1_UNORM_PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_B5G5R5A1_UNORM_PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_A1R5G5B5_UNORM_PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8_SNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8_USCALED)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8_SSCALED)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8_UINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8_SINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8_SRGB)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8G8_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8G8_SNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8G8_USCALED)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8G8_SSCALED)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8G8_UINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8G8_SINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8G8_SRGB)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8G8B8_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8G8B8_SNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8G8B8_USCALED)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8G8B8_SSCALED)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8G8B8_UINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8G8B8_SINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8G8B8_SRGB)
+		ENUM_TO_STRING_CASE(VK_FORMAT_B8G8R8_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_B8G8R8_SNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_B8G8R8_USCALED)
+		ENUM_TO_STRING_CASE(VK_FORMAT_B8G8R8_SSCALED)
+		ENUM_TO_STRING_CASE(VK_FORMAT_B8G8R8_UINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_B8G8R8_SINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_B8G8R8_SRGB)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8G8B8A8_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8G8B8A8_SNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8G8B8A8_USCALED)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8G8B8A8_SSCALED)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8G8B8A8_UINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8G8B8A8_SINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R8G8B8A8_SRGB)
+		ENUM_TO_STRING_CASE(VK_FORMAT_B8G8R8A8_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_B8G8R8A8_SNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_B8G8R8A8_USCALED)
+		ENUM_TO_STRING_CASE(VK_FORMAT_B8G8R8A8_SSCALED)
+		ENUM_TO_STRING_CASE(VK_FORMAT_B8G8R8A8_UINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_B8G8R8A8_SINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_B8G8R8A8_SRGB)
+		ENUM_TO_STRING_CASE(VK_FORMAT_A8B8G8R8_UNORM_PACK32)
+		ENUM_TO_STRING_CASE(VK_FORMAT_A8B8G8R8_SNORM_PACK32)
+		ENUM_TO_STRING_CASE(VK_FORMAT_A8B8G8R8_USCALED_PACK32)
+		ENUM_TO_STRING_CASE(VK_FORMAT_A8B8G8R8_SSCALED_PACK32)
+		ENUM_TO_STRING_CASE(VK_FORMAT_A8B8G8R8_UINT_PACK32)
+		ENUM_TO_STRING_CASE(VK_FORMAT_A8B8G8R8_SINT_PACK32)
+		ENUM_TO_STRING_CASE(VK_FORMAT_A8B8G8R8_SRGB_PACK32)
+		ENUM_TO_STRING_CASE(VK_FORMAT_A2R10G10B10_UNORM_PACK32)
+		ENUM_TO_STRING_CASE(VK_FORMAT_A2R10G10B10_SNORM_PACK32)
+		ENUM_TO_STRING_CASE(VK_FORMAT_A2R10G10B10_USCALED_PACK32)
+		ENUM_TO_STRING_CASE(VK_FORMAT_A2R10G10B10_SSCALED_PACK32)
+		ENUM_TO_STRING_CASE(VK_FORMAT_A2R10G10B10_UINT_PACK32)
+		ENUM_TO_STRING_CASE(VK_FORMAT_A2R10G10B10_SINT_PACK32)
+		ENUM_TO_STRING_CASE(VK_FORMAT_A2B10G10R10_UNORM_PACK32)
+		ENUM_TO_STRING_CASE(VK_FORMAT_A2B10G10R10_SNORM_PACK32)
+		ENUM_TO_STRING_CASE(VK_FORMAT_A2B10G10R10_USCALED_PACK32)
+		ENUM_TO_STRING_CASE(VK_FORMAT_A2B10G10R10_SSCALED_PACK32)
+		ENUM_TO_STRING_CASE(VK_FORMAT_A2B10G10R10_UINT_PACK32)
+		ENUM_TO_STRING_CASE(VK_FORMAT_A2B10G10R10_SINT_PACK32)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16_SNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16_USCALED)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16_SSCALED)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16_UINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16_SINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16_SFLOAT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16G16_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16G16_SNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16G16_USCALED)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16G16_SSCALED)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16G16_UINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16G16_SINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16G16_SFLOAT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16G16B16_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16G16B16_SNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16G16B16_USCALED)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16G16B16_SSCALED)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16G16B16_UINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16G16B16_SINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16G16B16_SFLOAT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16G16B16A16_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16G16B16A16_SNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16G16B16A16_USCALED)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16G16B16A16_SSCALED)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16G16B16A16_UINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16G16B16A16_SINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R16G16B16A16_SFLOAT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R32_UINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R32_SINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R32_SFLOAT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R32G32_UINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R32G32_SINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R32G32_SFLOAT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R32G32B32_UINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R32G32B32_SINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R32G32B32_SFLOAT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R32G32B32A32_UINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R32G32B32A32_SINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R32G32B32A32_SFLOAT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R64_UINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R64_SINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R64_SFLOAT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R64G64_UINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R64G64_SINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R64G64_SFLOAT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R64G64B64_UINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R64G64B64_SINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R64G64B64_SFLOAT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R64G64B64A64_UINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R64G64B64A64_SINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R64G64B64A64_SFLOAT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_B10G11R11_UFLOAT_PACK32)
+		ENUM_TO_STRING_CASE(VK_FORMAT_E5B9G9R9_UFLOAT_PACK32)
+		ENUM_TO_STRING_CASE(VK_FORMAT_D16_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_X8_D24_UNORM_PACK32)
+		ENUM_TO_STRING_CASE(VK_FORMAT_D32_SFLOAT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_S8_UINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_D16_UNORM_S8_UINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_D24_UNORM_S8_UINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_D32_SFLOAT_S8_UINT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_BC1_RGB_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_BC1_RGB_SRGB_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_BC1_RGBA_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_BC1_RGBA_SRGB_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_BC2_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_BC2_SRGB_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_BC3_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_BC3_SRGB_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_BC4_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_BC4_SNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_BC5_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_BC5_SNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_BC6H_UFLOAT_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_BC6H_SFLOAT_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_BC7_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_BC7_SRGB_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ETC2_R8G8B8_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ETC2_R8G8B8_SRGB_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ETC2_R8G8B8A1_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ETC2_R8G8B8A1_SRGB_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ETC2_R8G8B8A8_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ETC2_R8G8B8A8_SRGB_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_EAC_R11_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_EAC_R11_SNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_EAC_R11G11_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_EAC_R11G11_SNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_4x4_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_4x4_SRGB_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_5x4_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_5x4_SRGB_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_5x5_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_5x5_SRGB_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_6x5_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_6x5_SRGB_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_6x6_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_6x6_SRGB_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_8x5_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_8x5_SRGB_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_8x6_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_8x6_SRGB_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_8x8_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_8x8_SRGB_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_10x5_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_10x5_SRGB_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_10x6_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_10x6_SRGB_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_10x8_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_10x8_SRGB_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_10x10_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_10x10_SRGB_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_12x10_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_12x10_SRGB_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_12x12_UNORM_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_12x12_SRGB_BLOCK)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G8B8G8R8_422_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_B8G8R8G8_422_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G8_B8_R8_3PLANE_420_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G8_B8R8_2PLANE_420_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G8_B8_R8_3PLANE_422_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G8_B8R8_2PLANE_422_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G8_B8_R8_3PLANE_444_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R10X6_UNORM_PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R10X6G10X6_UNORM_2PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R10X6G10X6B10X6A10X6_UNORM_4PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G10X6B10X6G10X6R10X6_422_UNORM_4PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_B10X6G10X6R10X6G10X6_422_UNORM_4PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G10X6_B10X6_R10X6_3PLANE_420_UNORM_3PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G10X6_B10X6R10X6_2PLANE_420_UNORM_3PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G10X6_B10X6_R10X6_3PLANE_422_UNORM_3PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G10X6_B10X6R10X6_2PLANE_422_UNORM_3PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G10X6_B10X6_R10X6_3PLANE_444_UNORM_3PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R12X4_UNORM_PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R12X4G12X4_UNORM_2PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_R12X4G12X4B12X4A12X4_UNORM_4PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G12X4B12X4G12X4R12X4_422_UNORM_4PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_B12X4G12X4R12X4G12X4_422_UNORM_4PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G12X4_B12X4_R12X4_3PLANE_420_UNORM_3PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G12X4_B12X4R12X4_2PLANE_420_UNORM_3PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G12X4_B12X4_R12X4_3PLANE_422_UNORM_3PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G12X4_B12X4R12X4_2PLANE_422_UNORM_3PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G12X4_B12X4_R12X4_3PLANE_444_UNORM_3PACK16)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G16B16G16R16_422_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_B16G16R16G16_422_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G16_B16_R16_3PLANE_420_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G16_B16R16_2PLANE_420_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G16_B16_R16_3PLANE_422_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G16_B16R16_2PLANE_422_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G16_B16_R16_3PLANE_444_UNORM)
+		ENUM_TO_STRING_CASE(VK_FORMAT_PVRTC1_2BPP_UNORM_BLOCK_IMG)
+		ENUM_TO_STRING_CASE(VK_FORMAT_PVRTC1_4BPP_UNORM_BLOCK_IMG)
+		ENUM_TO_STRING_CASE(VK_FORMAT_PVRTC2_2BPP_UNORM_BLOCK_IMG)
+		ENUM_TO_STRING_CASE(VK_FORMAT_PVRTC2_4BPP_UNORM_BLOCK_IMG)
+		ENUM_TO_STRING_CASE(VK_FORMAT_PVRTC1_2BPP_SRGB_BLOCK_IMG)
+		ENUM_TO_STRING_CASE(VK_FORMAT_PVRTC1_4BPP_SRGB_BLOCK_IMG)
+		ENUM_TO_STRING_CASE(VK_FORMAT_PVRTC2_2BPP_SRGB_BLOCK_IMG)
+		ENUM_TO_STRING_CASE(VK_FORMAT_PVRTC2_4BPP_SRGB_BLOCK_IMG)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_4x4_SFLOAT_BLOCK_EXT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_5x4_SFLOAT_BLOCK_EXT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_5x5_SFLOAT_BLOCK_EXT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_6x5_SFLOAT_BLOCK_EXT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_6x6_SFLOAT_BLOCK_EXT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_8x5_SFLOAT_BLOCK_EXT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_8x6_SFLOAT_BLOCK_EXT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_8x8_SFLOAT_BLOCK_EXT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_10x5_SFLOAT_BLOCK_EXT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_10x6_SFLOAT_BLOCK_EXT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_10x8_SFLOAT_BLOCK_EXT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_10x10_SFLOAT_BLOCK_EXT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_12x10_SFLOAT_BLOCK_EXT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_ASTC_12x12_SFLOAT_BLOCK_EXT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G8_B8R8_2PLANE_444_UNORM_EXT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G10X6_B10X6R10X6_2PLANE_444_UNORM_3PACK16_EXT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G12X4_B12X4R12X4_2PLANE_444_UNORM_3PACK16_EXT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_G16_B16R16_2PLANE_444_UNORM_EXT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_A4R4G4B4_UNORM_PACK16_EXT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_A4B4G4R4_UNORM_PACK16_EXT)
+		ENUM_TO_STRING_CASE(VK_FORMAT_MAX_ENUM)
+		default: {
+			return String("Swapchain format ") + String::num_int64(int64_t(p_swapchain_format));
+		} break;
+	}
+}

modules/openxr/extensions/platform/openxr_vulkan_extension.h

@@ -0,0 +1,90 @@
+/**************************************************************************/
+/*  openxr_vulkan_extension.h                                             */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* 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.                 */
+/**************************************************************************/
+
+#pragma once
+
+#include "../../openxr_api.h"
+#include "../../util.h"
+#include "../openxr_extension_wrapper.h"
+
+#include "core/templates/vector.h"
+#include "drivers/vulkan/vulkan_hooks.h"
+
+// Always include this as late as possible.
+#include "../../openxr_platform_inc.h"
+
+class OpenXRVulkanExtension : public OpenXRGraphicsExtensionWrapper, VulkanHooks {
+public:
+	OpenXRVulkanExtension() = default;
+	virtual ~OpenXRVulkanExtension() override = default;
+
+	virtual HashMap<String, bool *> get_requested_extensions() override;
+
+	virtual void on_instance_created(const XrInstance p_instance) override;
+	virtual void *set_session_create_and_get_next_pointer(void *p_next_pointer) override;
+
+	virtual bool create_vulkan_instance(const VkInstanceCreateInfo *p_vulkan_create_info, VkInstance *r_instance) override final;
+	virtual bool get_physical_device(VkPhysicalDevice *r_device) override final;
+	virtual bool create_vulkan_device(const VkDeviceCreateInfo *p_device_create_info, VkDevice *r_device) override final;
+	virtual void set_direct_queue_family_and_index(uint32_t p_queue_family_index, uint32_t p_queue_index) override final;
+
+	virtual void get_usable_swapchain_formats(Vector<int64_t> &p_usable_swap_chains) override;
+	virtual void get_usable_depth_formats(Vector<int64_t> &p_usable_swap_chains) override;
+	virtual String get_swapchain_format_name(int64_t p_swapchain_format) const override;
+	virtual bool get_swapchain_image_data(XrSwapchain p_swapchain, int64_t p_swapchain_format, uint32_t p_width, uint32_t p_height, uint32_t p_sample_count, uint32_t p_array_size, void **r_swapchain_graphics_data) override;
+	virtual void cleanup_swapchain_graphics_data(void **p_swapchain_graphics_data) override;
+	virtual bool create_projection_fov(const XrFovf p_fov, double p_z_near, double p_z_far, Projection &r_camera_matrix) override;
+	virtual RID get_texture(void *p_swapchain_graphics_data, int p_image_index) override;
+	virtual RID get_density_map(void *p_swapchain_graphics_data, int p_image_index) override;
+
+private:
+	static OpenXRVulkanExtension *singleton;
+	static XrGraphicsBindingVulkanKHR graphics_binding_vulkan; // declaring this as static so we don't need to know its size and we only need it once when creating our session
+
+	struct SwapchainGraphicsData {
+		bool is_multiview;
+		Vector<RID> texture_rids;
+		Vector<RID> density_map_rids;
+	};
+
+	bool check_graphics_api_support(XrVersion p_desired_version);
+
+	VkInstance vulkan_instance = nullptr;
+	VkPhysicalDevice vulkan_physical_device = nullptr;
+	VkDevice vulkan_device = nullptr;
+	uint32_t vulkan_queue_family_index = UINT32_MAX;
+	uint32_t vulkan_queue_index = UINT32_MAX;
+
+	EXT_PROTO_XRRESULT_FUNC3(xrGetVulkanGraphicsRequirements2KHR, (XrInstance), p_instance, (XrSystemId), p_system_id, (XrGraphicsRequirementsVulkanKHR *), p_graphics_requirements)
+	EXT_PROTO_XRRESULT_FUNC4(xrCreateVulkanInstanceKHR, (XrInstance), p_instance, (const XrVulkanInstanceCreateInfoKHR *), p_create_info, (VkInstance *), r_vulkan_instance, (VkResult *), r_vulkan_result)
+	EXT_PROTO_XRRESULT_FUNC3(xrGetVulkanGraphicsDevice2KHR, (XrInstance), p_instance, (const XrVulkanGraphicsDeviceGetInfoKHR *), p_get_info, (VkPhysicalDevice *), r_vulkan_physical_device)
+	EXT_PROTO_XRRESULT_FUNC4(xrCreateVulkanDeviceKHR, (XrInstance), p_instance, (const XrVulkanDeviceCreateInfoKHR *), p_create_info, (VkDevice *), r_device, (VkResult *), r_result)
+	EXT_PROTO_XRRESULT_FUNC4(xrEnumerateSwapchainImages, (XrSwapchain), p_swapchain, (uint32_t), p_image_capacity_input, (uint32_t *), p_image_count_output, (XrSwapchainImageBaseHeader *), p_images)
+};