feat: godot-engine-source-4.3-stable

engine/modules/openxr/extensions/SCsub

@@ -0,0 +1,18 @@
+#!/usr/bin/env python
+
+Import("env")
+Import("env_openxr")
+
+module_obj = []
+
+env_openxr.add_source_files(module_obj, "*.cpp")
+
+# These are platform dependent
+if env["platform"] == "android":
+    env_openxr.add_source_files(module_obj, "platform/openxr_android_extension.cpp")
+if env["vulkan"]:
+    env_openxr.add_source_files(module_obj, "platform/openxr_vulkan_extension.cpp")
+if env["opengl3"] and env["platform"] != "macos":
+    env_openxr.add_source_files(module_obj, "platform/openxr_opengl_extension.cpp")
+
+env.modules_sources += module_obj

engine/modules/openxr/extensions/openxr_composition_layer_depth_extension.cpp

@@ -0,0 +1,70 @@
+/**************************************************************************/
+/*  openxr_composition_layer_depth_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_composition_layer_depth_extension.h"
+
+OpenXRCompositionLayerDepthExtension *OpenXRCompositionLayerDepthExtension::singleton = nullptr;
+
+OpenXRCompositionLayerDepthExtension *OpenXRCompositionLayerDepthExtension::get_singleton() {
+	return singleton;
+}
+
+OpenXRCompositionLayerDepthExtension::OpenXRCompositionLayerDepthExtension() {
+	singleton = this;
+}
+
+OpenXRCompositionLayerDepthExtension::~OpenXRCompositionLayerDepthExtension() {
+	singleton = nullptr;
+}
+
+HashMap<String, bool *> OpenXRCompositionLayerDepthExtension::get_requested_extensions() {
+	HashMap<String, bool *> request_extensions;
+
+	request_extensions[XR_KHR_COMPOSITION_LAYER_DEPTH_EXTENSION_NAME] = &available;
+
+	return request_extensions;
+}
+
+bool OpenXRCompositionLayerDepthExtension::is_available() {
+	return available;
+}
+
+int OpenXRCompositionLayerDepthExtension::get_composition_layer_count() {
+	return 0;
+}
+
+XrCompositionLayerBaseHeader *OpenXRCompositionLayerDepthExtension::get_composition_layer(int p_index) {
+	// Seems this is all done in our base layer... Just in case this changes...
+	return nullptr;
+}
+
+int OpenXRCompositionLayerDepthExtension::get_composition_layer_order(int p_index) {
+	return 0;
+}

engine/modules/openxr/extensions/openxr_composition_layer_depth_extension.h

@@ -0,0 +1,56 @@
+/**************************************************************************/
+/*  openxr_composition_layer_depth_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.                 */
+/**************************************************************************/
+
+#ifndef OPENXR_COMPOSITION_LAYER_DEPTH_EXTENSION_H
+#define OPENXR_COMPOSITION_LAYER_DEPTH_EXTENSION_H
+
+#include "openxr_composition_layer_provider.h"
+#include "openxr_extension_wrapper.h"
+
+class OpenXRCompositionLayerDepthExtension : public OpenXRExtensionWrapper, public OpenXRCompositionLayerProvider {
+public:
+	static OpenXRCompositionLayerDepthExtension *get_singleton();
+
+	OpenXRCompositionLayerDepthExtension();
+	virtual ~OpenXRCompositionLayerDepthExtension() override;
+
+	virtual HashMap<String, bool *> get_requested_extensions() override;
+	bool is_available();
+	virtual int get_composition_layer_count() override;
+	virtual XrCompositionLayerBaseHeader *get_composition_layer(int p_index) override;
+	virtual int get_composition_layer_order(int p_index) override;
+
+private:
+	static OpenXRCompositionLayerDepthExtension *singleton;
+
+	bool available = false;
+};
+
+#endif // OPENXR_COMPOSITION_LAYER_DEPTH_EXTENSION_H

engine/modules/openxr/extensions/openxr_composition_layer_extension.cpp

@@ -0,0 +1,325 @@
+/**************************************************************************/
+/*  openxr_composition_layer_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_composition_layer_extension.h"
+
+#include "servers/rendering/rendering_server_globals.h"
+
+////////////////////////////////////////////////////////////////////////////
+// OpenXRCompositionLayerExtension
+
+OpenXRCompositionLayerExtension *OpenXRCompositionLayerExtension::singleton = nullptr;
+
+OpenXRCompositionLayerExtension *OpenXRCompositionLayerExtension::get_singleton() {
+	return singleton;
+}
+
+OpenXRCompositionLayerExtension::OpenXRCompositionLayerExtension() {
+	singleton = this;
+}
+
+OpenXRCompositionLayerExtension::~OpenXRCompositionLayerExtension() {
+	singleton = nullptr;
+}
+
+HashMap<String, bool *> OpenXRCompositionLayerExtension::get_requested_extensions() {
+	HashMap<String, bool *> request_extensions;
+
+	request_extensions[XR_KHR_COMPOSITION_LAYER_CYLINDER_EXTENSION_NAME] = &cylinder_ext_available;
+	request_extensions[XR_KHR_COMPOSITION_LAYER_EQUIRECT2_EXTENSION_NAME] = &equirect_ext_available;
+
+	return request_extensions;
+}
+
+void OpenXRCompositionLayerExtension::on_session_created(const XrSession p_instance) {
+	OpenXRAPI::get_singleton()->register_composition_layer_provider(this);
+}
+
+void OpenXRCompositionLayerExtension::on_session_destroyed() {
+	OpenXRAPI::get_singleton()->unregister_composition_layer_provider(this);
+}
+
+void OpenXRCompositionLayerExtension::on_pre_render() {
+	for (OpenXRViewportCompositionLayerProvider *composition_layer : composition_layers) {
+		composition_layer->on_pre_render();
+	}
+}
+
+int OpenXRCompositionLayerExtension::get_composition_layer_count() {
+	return composition_layers.size();
+}
+
+XrCompositionLayerBaseHeader *OpenXRCompositionLayerExtension::get_composition_layer(int p_index) {
+	ERR_FAIL_INDEX_V(p_index, composition_layers.size(), nullptr);
+	return composition_layers[p_index]->get_composition_layer();
+}
+
+int OpenXRCompositionLayerExtension::get_composition_layer_order(int p_index) {
+	ERR_FAIL_INDEX_V(p_index, composition_layers.size(), 1);
+	return composition_layers[p_index]->get_sort_order();
+}
+
+void OpenXRCompositionLayerExtension::register_viewport_composition_layer_provider(OpenXRViewportCompositionLayerProvider *p_composition_layer) {
+	composition_layers.push_back(p_composition_layer);
+}
+
+void OpenXRCompositionLayerExtension::unregister_viewport_composition_layer_provider(OpenXRViewportCompositionLayerProvider *p_composition_layer) {
+	composition_layers.erase(p_composition_layer);
+}
+
+bool OpenXRCompositionLayerExtension::is_available(XrStructureType p_which) {
+	switch (p_which) {
+		case XR_TYPE_COMPOSITION_LAYER_QUAD: {
+			// Doesn't require an extension.
+			return true;
+		} break;
+		case XR_TYPE_COMPOSITION_LAYER_CYLINDER_KHR: {
+			return cylinder_ext_available;
+		} break;
+		case XR_TYPE_COMPOSITION_LAYER_EQUIRECT2_KHR: {
+			return equirect_ext_available;
+		} break;
+		default: {
+			ERR_PRINT(vformat("Unsupported composition layer type: %s", p_which));
+			return false;
+		}
+	}
+}
+
+////////////////////////////////////////////////////////////////////////////
+// OpenXRViewportCompositionLayerProvider
+
+OpenXRViewportCompositionLayerProvider::OpenXRViewportCompositionLayerProvider(XrCompositionLayerBaseHeader *p_composition_layer) {
+	composition_layer = p_composition_layer;
+	openxr_api = OpenXRAPI::get_singleton();
+	composition_layer_extension = OpenXRCompositionLayerExtension::get_singleton();
+}
+
+OpenXRViewportCompositionLayerProvider::~OpenXRViewportCompositionLayerProvider() {
+	for (OpenXRExtensionWrapper *extension : OpenXRAPI::get_registered_extension_wrappers()) {
+		extension->on_viewport_composition_layer_destroyed(composition_layer);
+	}
+
+	// This will reset the viewport and free the swapchain too.
+	set_viewport(RID(), Size2i());
+}
+
+void OpenXRViewportCompositionLayerProvider::set_alpha_blend(bool p_alpha_blend) {
+	if (alpha_blend != p_alpha_blend) {
+		alpha_blend = p_alpha_blend;
+		if (alpha_blend) {
+			composition_layer->layerFlags |= XR_COMPOSITION_LAYER_BLEND_TEXTURE_SOURCE_ALPHA_BIT;
+		} else {
+			composition_layer->layerFlags &= ~XR_COMPOSITION_LAYER_BLEND_TEXTURE_SOURCE_ALPHA_BIT;
+		}
+	}
+}
+
+void OpenXRViewportCompositionLayerProvider::set_viewport(RID p_viewport, Size2i p_size) {
+	RenderingServer *rs = RenderingServer::get_singleton();
+	ERR_FAIL_NULL(rs);
+
+	if (viewport != p_viewport) {
+		if (viewport.is_valid()) {
+			RID rt = rs->viewport_get_render_target(viewport);
+			RSG::texture_storage->render_target_set_override(rt, RID(), RID(), RID());
+		}
+
+		viewport = p_viewport;
+
+		if (viewport.is_valid()) {
+			viewport_size = p_size;
+		} else {
+			free_swapchain();
+			viewport_size = Size2i();
+		}
+	}
+}
+
+void OpenXRViewportCompositionLayerProvider::set_extension_property_values(const Dictionary &p_extension_property_values) {
+	extension_property_values = p_extension_property_values;
+	extension_property_values_changed = true;
+}
+
+void OpenXRViewportCompositionLayerProvider::on_pre_render() {
+	RenderingServer *rs = RenderingServer::get_singleton();
+	ERR_FAIL_NULL(rs);
+
+	if (viewport.is_valid() && openxr_api && openxr_api->is_running()) {
+		RS::ViewportUpdateMode update_mode = rs->viewport_get_update_mode(viewport);
+		if (update_mode == RS::VIEWPORT_UPDATE_ONCE || update_mode == RS::VIEWPORT_UPDATE_ALWAYS) {
+			// Update our XR swapchain
+			if (update_and_acquire_swapchain(update_mode == RS::VIEWPORT_UPDATE_ONCE)) {
+				// Render to our XR swapchain image.
+				RID rt = rs->viewport_get_render_target(viewport);
+				RSG::texture_storage->render_target_set_override(rt, get_current_swapchain_texture(), RID(), RID());
+			}
+		}
+	}
+}
+
+XrCompositionLayerBaseHeader *OpenXRViewportCompositionLayerProvider::get_composition_layer() {
+	if (openxr_api == nullptr || composition_layer_extension == nullptr) {
+		// OpenXR not initialized or we're in the editor?
+		return nullptr;
+	}
+
+	if (!composition_layer_extension->is_available(composition_layer->type)) {
+		// Selected type is not supported, ignore our layer.
+		return nullptr;
+	}
+
+	if (swapchain_info.get_swapchain() == XR_NULL_HANDLE) {
+		// Don't have a swapchain to display? Ignore our layer.
+		return nullptr;
+	}
+
+	if (swapchain_info.is_image_acquired()) {
+		swapchain_info.release();
+	}
+
+	// Update the layer struct for the swapchain.
+	switch (composition_layer->type) {
+		case XR_TYPE_COMPOSITION_LAYER_QUAD: {
+			XrCompositionLayerQuad *quad_layer = (XrCompositionLayerQuad *)composition_layer;
+			quad_layer->space = openxr_api->get_play_space();
+			quad_layer->subImage.swapchain = swapchain_info.get_swapchain();
+			quad_layer->subImage.imageArrayIndex = 0;
+			quad_layer->subImage.imageRect.offset.x = 0;
+			quad_layer->subImage.imageRect.offset.y = 0;
+			quad_layer->subImage.imageRect.extent.width = swapchain_size.width;
+			quad_layer->subImage.imageRect.extent.height = swapchain_size.height;
+		} break;
+
+		case XR_TYPE_COMPOSITION_LAYER_CYLINDER_KHR: {
+			XrCompositionLayerCylinderKHR *cylinder_layer = (XrCompositionLayerCylinderKHR *)composition_layer;
+			cylinder_layer->space = openxr_api->get_play_space();
+			cylinder_layer->subImage.swapchain = swapchain_info.get_swapchain();
+			cylinder_layer->subImage.imageArrayIndex = 0;
+			cylinder_layer->subImage.imageRect.offset.x = 0;
+			cylinder_layer->subImage.imageRect.offset.y = 0;
+			cylinder_layer->subImage.imageRect.extent.width = swapchain_size.width;
+			cylinder_layer->subImage.imageRect.extent.height = swapchain_size.height;
+		} break;
+
+		case XR_TYPE_COMPOSITION_LAYER_EQUIRECT2_KHR: {
+			XrCompositionLayerEquirect2KHR *equirect_layer = (XrCompositionLayerEquirect2KHR *)composition_layer;
+			equirect_layer->space = openxr_api->get_play_space();
+			equirect_layer->subImage.swapchain = swapchain_info.get_swapchain();
+			equirect_layer->subImage.imageArrayIndex = 0;
+			equirect_layer->subImage.imageRect.offset.x = 0;
+			equirect_layer->subImage.imageRect.offset.y = 0;
+			equirect_layer->subImage.imageRect.extent.width = swapchain_size.width;
+			equirect_layer->subImage.imageRect.extent.height = swapchain_size.height;
+		} break;
+
+		default: {
+			return nullptr;
+		} break;
+	}
+
+	if (extension_property_values_changed) {
+		extension_property_values_changed = false;
+
+		void *next_pointer = nullptr;
+		for (OpenXRExtensionWrapper *extension : OpenXRAPI::get_registered_extension_wrappers()) {
+			void *np = extension->set_viewport_composition_layer_and_get_next_pointer(composition_layer, extension_property_values, next_pointer);
+			if (np) {
+				next_pointer = np;
+			}
+		}
+		composition_layer->next = next_pointer;
+	}
+
+	return composition_layer;
+}
+
+bool OpenXRViewportCompositionLayerProvider::update_and_acquire_swapchain(bool p_static_image) {
+	if (openxr_api == nullptr || composition_layer_extension == nullptr) {
+		// OpenXR not initialized or we're in the editor?
+		return false;
+	}
+	if (!composition_layer_extension->is_available(composition_layer->type)) {
+		// Selected type is not supported?
+		return false;
+	}
+
+	// See if our current swapchain is outdated.
+	if (swapchain_info.get_swapchain() != XR_NULL_HANDLE) {
+		// If this swap chain, or the previous one, were static, then we can't reuse it.
+		if (swapchain_size == viewport_size && !p_static_image && !static_image) {
+			// We're all good! Just acquire it.
+			// We can ignore should_render here, return will be false.
+			bool should_render = true;
+			return swapchain_info.acquire(should_render);
+		}
+
+		swapchain_info.queue_free();
+	}
+
+	// Create our new swap chain
+	int64_t swapchain_format = openxr_api->get_color_swapchain_format();
+	const uint32_t sample_count = 1;
+	const uint32_t array_size = 1;
+	XrSwapchainCreateFlags create_flags = 0;
+	if (p_static_image) {
+		create_flags |= XR_SWAPCHAIN_CREATE_STATIC_IMAGE_BIT;
+	}
+	if (!swapchain_info.create(create_flags, XR_SWAPCHAIN_USAGE_SAMPLED_BIT | XR_SWAPCHAIN_USAGE_COLOR_ATTACHMENT_BIT | XR_SWAPCHAIN_USAGE_MUTABLE_FORMAT_BIT, swapchain_format, viewport_size.width, viewport_size.height, sample_count, array_size)) {
+		swapchain_size = Size2i();
+		return false;
+	}
+
+	// Acquire our image so we can start rendering into it,
+	// we can ignore should_render here, ret will be false.
+	bool should_render = true;
+	bool ret = swapchain_info.acquire(should_render);
+
+	swapchain_size = viewport_size;
+	static_image = p_static_image;
+	return ret;
+}
+
+void OpenXRViewportCompositionLayerProvider::free_swapchain() {
+	if (swapchain_info.get_swapchain() != XR_NULL_HANDLE) {
+		swapchain_info.queue_free();
+	}
+
+	swapchain_size = Size2i();
+	static_image = false;
+}
+
+RID OpenXRViewportCompositionLayerProvider::get_current_swapchain_texture() {
+	if (openxr_api == nullptr) {
+		return RID();
+	}
+
+	return swapchain_info.get_image();
+}

engine/modules/openxr/extensions/openxr_composition_layer_extension.h

@@ -0,0 +1,116 @@
+/**************************************************************************/
+/*  openxr_composition_layer_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.                 */
+/**************************************************************************/
+
+#ifndef OPENXR_COMPOSITION_LAYER_EXTENSION_H
+#define OPENXR_COMPOSITION_LAYER_EXTENSION_H
+
+#include "openxr_composition_layer_provider.h"
+#include "openxr_extension_wrapper.h"
+
+#include "../openxr_api.h"
+
+class OpenXRViewportCompositionLayerProvider;
+
+// This extension provides access to composition layers for displaying 2D content through the XR compositor.
+
+// OpenXRCompositionLayerExtension enables the extensions related to this functionality
+class OpenXRCompositionLayerExtension : public OpenXRExtensionWrapper, public OpenXRCompositionLayerProvider {
+public:
+	static OpenXRCompositionLayerExtension *get_singleton();
+
+	OpenXRCompositionLayerExtension();
+	virtual ~OpenXRCompositionLayerExtension() override;
+
+	virtual HashMap<String, bool *> get_requested_extensions() override;
+	virtual void on_session_created(const XrSession p_instance) override;
+	virtual void on_session_destroyed() override;
+	virtual void on_pre_render() override;
+
+	virtual int get_composition_layer_count() override;
+	virtual XrCompositionLayerBaseHeader *get_composition_layer(int p_index) override;
+	virtual int get_composition_layer_order(int p_index) override;
+
+	void register_viewport_composition_layer_provider(OpenXRViewportCompositionLayerProvider *p_composition_layer);
+	void unregister_viewport_composition_layer_provider(OpenXRViewportCompositionLayerProvider *p_composition_layer);
+
+	bool is_available(XrStructureType p_which);
+
+private:
+	static OpenXRCompositionLayerExtension *singleton;
+
+	Vector<OpenXRViewportCompositionLayerProvider *> composition_layers;
+
+	bool cylinder_ext_available = false;
+	bool equirect_ext_available = false;
+};
+
+class OpenXRViewportCompositionLayerProvider {
+	XrCompositionLayerBaseHeader *composition_layer = nullptr;
+	int sort_order = 1;
+	bool alpha_blend = false;
+	Dictionary extension_property_values;
+	bool extension_property_values_changed = true;
+
+	RID viewport;
+	Size2i viewport_size;
+
+	OpenXRAPI::OpenXRSwapChainInfo swapchain_info;
+	Size2i swapchain_size;
+	bool static_image = false;
+
+	OpenXRAPI *openxr_api = nullptr;
+	OpenXRCompositionLayerExtension *composition_layer_extension = nullptr;
+
+	bool update_and_acquire_swapchain(bool p_static_image);
+	void free_swapchain();
+	RID get_current_swapchain_texture();
+
+public:
+	XrStructureType get_openxr_type() { return composition_layer->type; }
+
+	void set_sort_order(int p_sort_order) { sort_order = p_sort_order; }
+	int get_sort_order() const { return sort_order; }
+
+	void set_alpha_blend(bool p_alpha_blend);
+	bool get_alpha_blend() const { return alpha_blend; }
+
+	void set_viewport(RID p_viewport, Size2i p_size);
+	RID get_viewport() const { return viewport; }
+
+	void set_extension_property_values(const Dictionary &p_property_values);
+
+	void on_pre_render();
+	XrCompositionLayerBaseHeader *get_composition_layer();
+
+	OpenXRViewportCompositionLayerProvider(XrCompositionLayerBaseHeader *p_composition_layer);
+	~OpenXRViewportCompositionLayerProvider();
+};
+
+#endif // OPENXR_COMPOSITION_LAYER_EXTENSION_H

engine/modules/openxr/extensions/openxr_composition_layer_provider.h

@@ -0,0 +1,48 @@
+/**************************************************************************/
+/*  openxr_composition_layer_provider.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.                 */
+/**************************************************************************/
+
+#ifndef OPENXR_COMPOSITION_LAYER_PROVIDER_H
+#define OPENXR_COMPOSITION_LAYER_PROVIDER_H
+
+#include "openxr_extension_wrapper.h"
+
+#include <openxr/openxr.h>
+
+// Interface for OpenXR extensions that provide a composition layer.
+class OpenXRCompositionLayerProvider {
+public:
+	virtual int get_composition_layer_count() = 0;
+	virtual XrCompositionLayerBaseHeader *get_composition_layer(int p_index) = 0;
+	virtual int get_composition_layer_order(int p_index) = 0;
+
+	virtual ~OpenXRCompositionLayerProvider() {}
+};
+
+#endif // OPENXR_COMPOSITION_LAYER_PROVIDER_H

engine/modules/openxr/extensions/openxr_extension_wrapper.h

@@ -0,0 +1,127 @@
+/**************************************************************************/
+/*  openxr_extension_wrapper.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.                 */
+/**************************************************************************/
+
+#ifndef OPENXR_EXTENSION_WRAPPER_H
+#define OPENXR_EXTENSION_WRAPPER_H
+
+#include "core/error/error_macros.h"
+#include "core/math/projection.h"
+#include "core/templates/hash_map.h"
+#include "core/templates/rid.h"
+#include "core/variant/variant.h"
+
+#include <openxr/openxr.h>
+
+class OpenXRAPI;
+class OpenXRActionMap;
+
+// `OpenXRExtensionWrapper` allows us to implement OpenXR extensions.
+class OpenXRExtensionWrapper {
+public:
+	// `get_requested_extensions` should return a list of OpenXR extensions related to this extension.
+	// If the bool * is a nullptr this extension is mandatory
+	// If the bool * points to a boolean, the boolean will be updated
+	// to true if the extension is enabled.
+	virtual HashMap<String, bool *> get_requested_extensions() = 0;
+
+	// These functions allow an extension to add entries to a struct chain.
+	// `p_next_pointer` points to the last struct that was created for this chain
+	// and should be used as the value for the `pNext` pointer in the first struct you add.
+	// You should return the pointer to the last struct you define as your result.
+	// If you are not adding any structs, just return `p_next_pointer`.
+	// See existing extensions for examples of this implementation.
+	virtual void *set_system_properties_and_get_next_pointer(void *p_next_pointer) { return p_next_pointer; } // Add additional data structures when we interogate OpenXRS system abilities.
+	virtual void *set_instance_create_info_and_get_next_pointer(void *p_next_pointer) { return p_next_pointer; } // Add additional data structures when we create our OpenXR instance.
+	virtual void *set_session_create_and_get_next_pointer(void *p_next_pointer) { return p_next_pointer; } // Add additional data structures when we create our OpenXR session.
+	virtual void *set_swapchain_create_info_and_get_next_pointer(void *p_next_pointer) { return p_next_pointer; } // Add additional data structures when creating OpenXR swap chains.
+	virtual void *set_hand_joint_locations_and_get_next_pointer(int p_hand_index, void *p_next_pointer) { return p_next_pointer; }
+
+	virtual PackedStringArray get_suggested_tracker_names() { return PackedStringArray(); }
+
+	// `on_register_metadata` allows extensions to register additional controller metadata.
+	// This function is called even when OpenXRApi is not constructured as the metadata
+	// needs to be available to the editor.
+	// Also extensions should provide metadata regardless of whether they are supported
+	// on the host system as the controller data is used to setup action maps for users
+	// who may have access to the relevant hardware.
+	virtual void on_register_metadata() {}
+
+	virtual void on_before_instance_created() {} // `on_before_instance_created` is called before we create our OpenXR instance.
+	virtual void on_instance_created(const XrInstance p_instance) {} // `on_instance_created` is called right after we've successfully created our OpenXR instance.
+	virtual void on_instance_destroyed() {} // `on_instance_destroyed` is called right before we destroy our OpenXR instance.
+	virtual void on_session_created(const XrSession p_instance) {} // `on_session_created` is called right after we've successfully created our OpenXR session.
+	virtual void on_session_destroyed() {} // `on_session_destroyed` is called right before we destroy our OpenXR session.
+
+	// `on_process` is called as part of our OpenXR process handling,
+	// this happens right before physics process and normal processing is run.
+	// This is when controller data is queried and made available to game logic.
+	virtual void on_process() {}
+	virtual void on_pre_render() {} // `on_pre_render` is called right before we start rendering our XR viewports.
+	virtual void on_main_swapchains_created() {} // `on_main_swapchains_created` is called right after our main swapchains are (re)created.
+	virtual void on_pre_draw_viewport(RID p_render_target) {} // `on_pre_draw_viewport` is called right before we start rendering this viewport
+	virtual void on_post_draw_viewport(RID p_render_target) {} // `on_port_draw_viewport` is called right after we start rendering this viewport (note that on Vulkan draw commands may only be queued)
+
+	virtual void on_state_idle() {} // `on_state_idle` is called when the OpenXR session state is changed to idle.
+	virtual void on_state_ready() {} // `on_state_ready` is called when the OpenXR session state is changed to ready, this means OpenXR is ready to setup our session.
+	virtual void on_state_synchronized() {} // `on_state_synchronized` is called when the OpenXR session state is changed to synchronized, note that OpenXR also returns to this state when our application looses focus.
+	virtual void on_state_visible() {} // `on_state_visible` is called when the OpenXR session state is changed to visible, OpenXR is now ready to receive frames.
+	virtual void on_state_focused() {} // `on_state_focused` is called when the OpenXR session state is changed to focused, this state is the active state when our game runs.
+	virtual void on_state_stopping() {} // `on_state_stopping` is called when the OpenXR session state is changed to stopping.
+	virtual void on_state_loss_pending() {} // `on_state_loss_pending` is called when the OpenXR session state is changed to loss pending.
+	virtual void on_state_exiting() {} // `on_state_exiting` is called when the OpenXR session state is changed to exiting.
+
+	virtual void *set_viewport_composition_layer_and_get_next_pointer(const XrCompositionLayerBaseHeader *p_layer, Dictionary p_property_values, void *p_next_pointer) { return p_next_pointer; } // Add additional data structures to composition layers created via OpenXRCompositionLayer.
+	virtual void on_viewport_composition_layer_destroyed(const XrCompositionLayerBaseHeader *p_layer) {} // `on_viewport_composition_layer_destroyed` is called when a composition layer created via OpenXRCompositionLayer is destroyed.
+	virtual void get_viewport_composition_layer_extension_properties(List<PropertyInfo> *p_property_list) {} // Get additional property definitions for OpenXRCompositionLayer.
+	virtual Dictionary get_viewport_composition_layer_extension_property_defaults() { return Dictionary(); } // Get the default values for the additional property definitions for OpenXRCompositionLayer.
+
+	// `on_event_polled` is called when there is an OpenXR event to process.
+	// Should return true if the event was handled, false otherwise.
+	virtual bool on_event_polled(const XrEventDataBuffer &event) {
+		return false;
+	}
+
+	OpenXRExtensionWrapper() = default;
+	virtual ~OpenXRExtensionWrapper() = default;
+};
+
+// `OpenXRGraphicsExtensionWrapper` implements specific logic for each supported graphics API.
+class OpenXRGraphicsExtensionWrapper : public OpenXRExtensionWrapper {
+public:
+	virtual void get_usable_swapchain_formats(Vector<int64_t> &p_usable_swap_chains) = 0; // `get_usable_swapchain_formats` should return a list of usable color formats.
+	virtual void get_usable_depth_formats(Vector<int64_t> &p_usable_swap_chains) = 0; // `get_usable_depth_formats` should return a list of usable depth formats.
+	virtual String get_swapchain_format_name(int64_t p_swapchain_format) const = 0; // `get_swapchain_format_name` should return the constant name of a given format.
+	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) = 0; // `get_swapchain_image_data` extracts image IDs for the swapchain images and stores there in an implementation dependent data structure.
+	virtual void cleanup_swapchain_graphics_data(void **p_swapchain_graphics_data) = 0; // `cleanup_swapchain_graphics_data` cleans up the data held in our implementation dependent data structure and should free up its memory.
+	virtual bool create_projection_fov(const XrFovf p_fov, double p_z_near, double p_z_far, Projection &r_camera_matrix) = 0; // `create_projection_fov` creates a proper projection matrix based on asymmetric FOV data provided by OpenXR.
+	virtual RID get_texture(void *p_swapchain_graphics_data, int p_image_index) = 0; // `get_texture` returns a Godot texture RID for the current active texture in our swapchain.
+};
+
+#endif // OPENXR_EXTENSION_WRAPPER_H

engine/modules/openxr/extensions/openxr_extension_wrapper_extension.cpp

@@ -0,0 +1,296 @@
+/**************************************************************************/
+/*  openxr_extension_wrapper_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_extension_wrapper_extension.h"
+
+#include "../openxr_api.h"
+
+void OpenXRExtensionWrapperExtension::_bind_methods() {
+	GDVIRTUAL_BIND(_get_requested_extensions);
+	GDVIRTUAL_BIND(_set_system_properties_and_get_next_pointer, "next_pointer");
+	GDVIRTUAL_BIND(_set_instance_create_info_and_get_next_pointer, "next_pointer");
+	GDVIRTUAL_BIND(_set_session_create_and_get_next_pointer, "next_pointer");
+	GDVIRTUAL_BIND(_set_swapchain_create_info_and_get_next_pointer, "next_pointer");
+	GDVIRTUAL_BIND(_set_hand_joint_locations_and_get_next_pointer, "hand_index", "next_pointer");
+	GDVIRTUAL_BIND(_get_composition_layer_count);
+	GDVIRTUAL_BIND(_get_composition_layer, "index");
+	GDVIRTUAL_BIND(_get_composition_layer_order, "index");
+	GDVIRTUAL_BIND(_get_suggested_tracker_names);
+	GDVIRTUAL_BIND(_on_register_metadata);
+	GDVIRTUAL_BIND(_on_before_instance_created);
+	GDVIRTUAL_BIND(_on_instance_created, "instance");
+	GDVIRTUAL_BIND(_on_instance_destroyed);
+	GDVIRTUAL_BIND(_on_session_created, "session");
+	GDVIRTUAL_BIND(_on_process);
+	GDVIRTUAL_BIND(_on_pre_render);
+	GDVIRTUAL_BIND(_on_main_swapchains_created);
+	GDVIRTUAL_BIND(_on_session_destroyed);
+	GDVIRTUAL_BIND(_on_state_idle);
+	GDVIRTUAL_BIND(_on_state_ready);
+	GDVIRTUAL_BIND(_on_state_synchronized);
+	GDVIRTUAL_BIND(_on_state_visible);
+	GDVIRTUAL_BIND(_on_state_focused);
+	GDVIRTUAL_BIND(_on_state_stopping);
+	GDVIRTUAL_BIND(_on_state_loss_pending);
+	GDVIRTUAL_BIND(_on_state_exiting);
+	GDVIRTUAL_BIND(_on_event_polled, "event");
+	GDVIRTUAL_BIND(_set_viewport_composition_layer_and_get_next_pointer, "layer", "property_values", "next_pointer");
+	GDVIRTUAL_BIND(_get_viewport_composition_layer_extension_properties);
+	GDVIRTUAL_BIND(_get_viewport_composition_layer_extension_property_defaults);
+	GDVIRTUAL_BIND(_on_viewport_composition_layer_destroyed, "layer");
+
+	ClassDB::bind_method(D_METHOD("get_openxr_api"), &OpenXRExtensionWrapperExtension::get_openxr_api);
+	ClassDB::bind_method(D_METHOD("register_extension_wrapper"), &OpenXRExtensionWrapperExtension::register_extension_wrapper);
+}
+
+HashMap<String, bool *> OpenXRExtensionWrapperExtension::get_requested_extensions() {
+	Dictionary request_extension;
+
+	if (GDVIRTUAL_CALL(_get_requested_extensions, request_extension)) {
+		HashMap<String, bool *> result;
+		Array keys = request_extension.keys();
+		for (int i = 0; i < keys.size(); i++) {
+			String key = keys.get(i);
+			GDExtensionPtr<bool> value = VariantCaster<GDExtensionPtr<bool>>::cast(request_extension.get(key, GDExtensionPtr<bool>(nullptr)));
+			result.insert(key, value);
+		}
+		return result;
+	}
+
+	return HashMap<String, bool *>();
+}
+
+void *OpenXRExtensionWrapperExtension::set_system_properties_and_get_next_pointer(void *p_next_pointer) {
+	uint64_t pointer;
+
+	if (GDVIRTUAL_CALL(_set_system_properties_and_get_next_pointer, GDExtensionPtr<void>(p_next_pointer), pointer)) {
+		return reinterpret_cast<void *>(pointer);
+	}
+
+	return nullptr;
+}
+
+void *OpenXRExtensionWrapperExtension::set_instance_create_info_and_get_next_pointer(void *p_next_pointer) {
+	uint64_t pointer;
+
+	if (GDVIRTUAL_CALL(_set_instance_create_info_and_get_next_pointer, GDExtensionPtr<void>(p_next_pointer), pointer)) {
+		return reinterpret_cast<void *>(pointer);
+	}
+
+	return nullptr;
+}
+
+void *OpenXRExtensionWrapperExtension::set_session_create_and_get_next_pointer(void *p_next_pointer) {
+	uint64_t pointer;
+
+	if (GDVIRTUAL_CALL(_set_session_create_and_get_next_pointer, GDExtensionPtr<void>(p_next_pointer), pointer)) {
+		return reinterpret_cast<void *>(pointer);
+	}
+
+	return nullptr;
+}
+
+void *OpenXRExtensionWrapperExtension::set_swapchain_create_info_and_get_next_pointer(void *p_next_pointer) {
+	uint64_t pointer;
+
+	if (GDVIRTUAL_CALL(_set_swapchain_create_info_and_get_next_pointer, GDExtensionPtr<void>(p_next_pointer), pointer)) {
+		return reinterpret_cast<void *>(pointer);
+	}
+
+	return nullptr;
+}
+
+void *OpenXRExtensionWrapperExtension::set_hand_joint_locations_and_get_next_pointer(int p_hand_index, void *p_next_pointer) {
+	uint64_t pointer;
+
+	if (GDVIRTUAL_CALL(_set_hand_joint_locations_and_get_next_pointer, p_hand_index, GDExtensionPtr<void>(p_next_pointer), pointer)) {
+		return reinterpret_cast<void *>(pointer);
+	}
+
+	return nullptr;
+}
+
+PackedStringArray OpenXRExtensionWrapperExtension::get_suggested_tracker_names() {
+	PackedStringArray ret;
+
+	if (GDVIRTUAL_CALL(_get_suggested_tracker_names, ret)) {
+		return ret;
+	}
+
+	return PackedStringArray();
+}
+
+int OpenXRExtensionWrapperExtension::get_composition_layer_count() {
+	int count = 0;
+	GDVIRTUAL_CALL(_get_composition_layer_count, count);
+	return count;
+}
+
+XrCompositionLayerBaseHeader *OpenXRExtensionWrapperExtension::get_composition_layer(int p_index) {
+	uint64_t pointer;
+
+	if (GDVIRTUAL_CALL(_get_composition_layer, p_index, pointer)) {
+		return reinterpret_cast<XrCompositionLayerBaseHeader *>(pointer);
+	}
+
+	return nullptr;
+}
+
+int OpenXRExtensionWrapperExtension::get_composition_layer_order(int p_index) {
+	int order = 0;
+	GDVIRTUAL_CALL(_get_composition_layer_order, p_index, order);
+	return order;
+}
+
+void OpenXRExtensionWrapperExtension::on_register_metadata() {
+	GDVIRTUAL_CALL(_on_register_metadata);
+}
+
+void OpenXRExtensionWrapperExtension::on_before_instance_created() {
+	GDVIRTUAL_CALL(_on_before_instance_created);
+}
+
+void OpenXRExtensionWrapperExtension::on_instance_created(const XrInstance p_instance) {
+	uint64_t instance = (uint64_t)p_instance;
+	GDVIRTUAL_CALL(_on_instance_created, instance);
+}
+
+void OpenXRExtensionWrapperExtension::on_instance_destroyed() {
+	GDVIRTUAL_CALL(_on_instance_destroyed);
+}
+
+void OpenXRExtensionWrapperExtension::on_session_created(const XrSession p_session) {
+	uint64_t session = (uint64_t)p_session;
+	GDVIRTUAL_CALL(_on_session_created, session);
+}
+
+void OpenXRExtensionWrapperExtension::on_process() {
+	GDVIRTUAL_CALL(_on_process);
+}
+
+void OpenXRExtensionWrapperExtension::on_pre_render() {
+	GDVIRTUAL_CALL(_on_pre_render);
+}
+
+void OpenXRExtensionWrapperExtension::on_main_swapchains_created() {
+	GDVIRTUAL_CALL(_on_main_swapchains_created);
+}
+
+void OpenXRExtensionWrapperExtension::on_session_destroyed() {
+	GDVIRTUAL_CALL(_on_session_destroyed);
+}
+
+void OpenXRExtensionWrapperExtension::on_state_idle() {
+	GDVIRTUAL_CALL(_on_state_idle);
+}
+
+void OpenXRExtensionWrapperExtension::on_state_ready() {
+	GDVIRTUAL_CALL(_on_state_ready);
+}
+
+void OpenXRExtensionWrapperExtension::on_state_synchronized() {
+	GDVIRTUAL_CALL(_on_state_synchronized);
+}
+
+void OpenXRExtensionWrapperExtension::on_state_visible() {
+	GDVIRTUAL_CALL(_on_state_visible);
+}
+
+void OpenXRExtensionWrapperExtension::on_state_focused() {
+	GDVIRTUAL_CALL(_on_state_focused);
+}
+
+void OpenXRExtensionWrapperExtension::on_state_stopping() {
+	GDVIRTUAL_CALL(_on_state_stopping);
+}
+
+void OpenXRExtensionWrapperExtension::on_state_loss_pending() {
+	GDVIRTUAL_CALL(_on_state_loss_pending);
+}
+
+void OpenXRExtensionWrapperExtension::on_state_exiting() {
+	GDVIRTUAL_CALL(_on_state_exiting);
+}
+
+bool OpenXRExtensionWrapperExtension::on_event_polled(const XrEventDataBuffer &p_event) {
+	bool event_polled;
+
+	if (GDVIRTUAL_CALL(_on_event_polled, GDExtensionConstPtr<void>(&p_event), event_polled)) {
+		return event_polled;
+	}
+
+	return false;
+}
+
+void *OpenXRExtensionWrapperExtension::set_viewport_composition_layer_and_get_next_pointer(const XrCompositionLayerBaseHeader *p_layer, Dictionary p_property_values, void *p_next_pointer) {
+	uint64_t pointer = 0;
+
+	if (GDVIRTUAL_CALL(_set_viewport_composition_layer_and_get_next_pointer, GDExtensionConstPtr<void>(p_layer), p_property_values, GDExtensionPtr<void>(p_next_pointer), pointer)) {
+		return reinterpret_cast<void *>(pointer);
+	}
+
+	return p_next_pointer;
+}
+
+void OpenXRExtensionWrapperExtension::on_viewport_composition_layer_destroyed(const XrCompositionLayerBaseHeader *p_layer) {
+	GDVIRTUAL_CALL(_on_viewport_composition_layer_destroyed, GDExtensionConstPtr<void>(p_layer));
+}
+
+void OpenXRExtensionWrapperExtension::get_viewport_composition_layer_extension_properties(List<PropertyInfo> *p_property_list) {
+	TypedArray<Dictionary> properties;
+
+	if (GDVIRTUAL_CALL(_get_viewport_composition_layer_extension_properties, properties)) {
+		for (int i = 0; i < properties.size(); i++) {
+			p_property_list->push_back(PropertyInfo::from_dict(properties[i]));
+		}
+	}
+}
+
+Dictionary OpenXRExtensionWrapperExtension::get_viewport_composition_layer_extension_property_defaults() {
+	Dictionary property_defaults;
+	GDVIRTUAL_CALL(_get_viewport_composition_layer_extension_property_defaults, property_defaults);
+	return property_defaults;
+}
+
+Ref<OpenXRAPIExtension> OpenXRExtensionWrapperExtension::get_openxr_api() {
+	return openxr_api;
+}
+
+void OpenXRExtensionWrapperExtension::register_extension_wrapper() {
+	OpenXRAPI::register_extension_wrapper(this);
+}
+
+OpenXRExtensionWrapperExtension::OpenXRExtensionWrapperExtension() :
+		Object(), OpenXRExtensionWrapper() {
+	openxr_api.instantiate();
+}
+
+OpenXRExtensionWrapperExtension::~OpenXRExtensionWrapperExtension() {
+}

engine/modules/openxr/extensions/openxr_extension_wrapper_extension.h

@@ -0,0 +1,142 @@
+/**************************************************************************/
+/*  openxr_extension_wrapper_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.                 */
+/**************************************************************************/
+
+#ifndef OPENXR_EXTENSION_WRAPPER_EXTENSION_H
+#define OPENXR_EXTENSION_WRAPPER_EXTENSION_H
+
+#include "../openxr_api_extension.h"
+#include "openxr_extension_wrapper.h"
+
+#include "core/object/ref_counted.h"
+#include "core/os/os.h"
+#include "core/os/thread_safe.h"
+#include "core/variant/native_ptr.h"
+#include "core/variant/typed_array.h"
+
+class OpenXRExtensionWrapperExtension : public Object, public OpenXRExtensionWrapper, public OpenXRCompositionLayerProvider {
+	GDCLASS(OpenXRExtensionWrapperExtension, Object);
+
+protected:
+	_THREAD_SAFE_CLASS_
+
+	static void _bind_methods();
+
+	Ref<OpenXRAPIExtension> openxr_api;
+
+public:
+	virtual HashMap<String, bool *> get_requested_extensions() override;
+
+	GDVIRTUAL0R(Dictionary, _get_requested_extensions);
+
+	virtual void *set_system_properties_and_get_next_pointer(void *p_next_pointer) override;
+	virtual void *set_instance_create_info_and_get_next_pointer(void *p_next_pointer) override;
+	virtual void *set_session_create_and_get_next_pointer(void *p_next_pointer) override;
+	virtual void *set_swapchain_create_info_and_get_next_pointer(void *p_next_pointer) override;
+	virtual void *set_hand_joint_locations_and_get_next_pointer(int p_hand_index, void *p_next_pointer) override;
+
+	virtual int get_composition_layer_count() override;
+	virtual XrCompositionLayerBaseHeader *get_composition_layer(int p_index) override;
+	virtual int get_composition_layer_order(int p_index) override;
+
+	//TODO workaround as GDExtensionPtr<void> return type results in build error in godot-cpp
+	GDVIRTUAL1R(uint64_t, _set_system_properties_and_get_next_pointer, GDExtensionPtr<void>);
+	GDVIRTUAL1R(uint64_t, _set_instance_create_info_and_get_next_pointer, GDExtensionPtr<void>);
+	GDVIRTUAL1R(uint64_t, _set_session_create_and_get_next_pointer, GDExtensionPtr<void>);
+	GDVIRTUAL1R(uint64_t, _set_swapchain_create_info_and_get_next_pointer, GDExtensionPtr<void>);
+	GDVIRTUAL2R(uint64_t, _set_hand_joint_locations_and_get_next_pointer, int, GDExtensionPtr<void>);
+	GDVIRTUAL0R(int, _get_composition_layer_count);
+	GDVIRTUAL1R(uint64_t, _get_composition_layer, int);
+	GDVIRTUAL1R(int, _get_composition_layer_order, int);
+
+	virtual PackedStringArray get_suggested_tracker_names() override;
+
+	GDVIRTUAL0R(PackedStringArray, _get_suggested_tracker_names);
+
+	virtual void on_register_metadata() override;
+	virtual void on_before_instance_created() override;
+	virtual void on_instance_created(const XrInstance p_instance) override;
+	virtual void on_instance_destroyed() override;
+	virtual void on_session_created(const XrSession p_session) override;
+	virtual void on_process() override;
+	virtual void on_pre_render() override;
+	virtual void on_main_swapchains_created() override;
+	virtual void on_session_destroyed() override;
+
+	GDVIRTUAL0(_on_register_metadata);
+	GDVIRTUAL0(_on_before_instance_created);
+	GDVIRTUAL1(_on_instance_created, uint64_t);
+	GDVIRTUAL0(_on_instance_destroyed);
+	GDVIRTUAL1(_on_session_created, uint64_t);
+	GDVIRTUAL0(_on_process);
+	GDVIRTUAL0(_on_pre_render);
+	GDVIRTUAL0(_on_main_swapchains_created);
+	GDVIRTUAL0(_on_session_destroyed);
+
+	virtual void on_state_idle() override;
+	virtual void on_state_ready() override;
+	virtual void on_state_synchronized() override;
+	virtual void on_state_visible() override;
+	virtual void on_state_focused() override;
+	virtual void on_state_stopping() override;
+	virtual void on_state_loss_pending() override;
+	virtual void on_state_exiting() override;
+
+	GDVIRTUAL0(_on_state_idle);
+	GDVIRTUAL0(_on_state_ready);
+	GDVIRTUAL0(_on_state_synchronized);
+	GDVIRTUAL0(_on_state_visible);
+	GDVIRTUAL0(_on_state_focused);
+	GDVIRTUAL0(_on_state_stopping);
+	GDVIRTUAL0(_on_state_loss_pending);
+	GDVIRTUAL0(_on_state_exiting);
+
+	virtual bool on_event_polled(const XrEventDataBuffer &p_event) override;
+
+	GDVIRTUAL1R(bool, _on_event_polled, GDExtensionConstPtr<void>);
+
+	virtual void *set_viewport_composition_layer_and_get_next_pointer(const XrCompositionLayerBaseHeader *p_layer, Dictionary p_property_values, void *p_next_pointer) override;
+	virtual void on_viewport_composition_layer_destroyed(const XrCompositionLayerBaseHeader *p_layer) override;
+	virtual void get_viewport_composition_layer_extension_properties(List<PropertyInfo> *p_property_list) override;
+	virtual Dictionary get_viewport_composition_layer_extension_property_defaults() override;
+
+	GDVIRTUAL3R(uint64_t, _set_viewport_composition_layer_and_get_next_pointer, GDExtensionConstPtr<void>, Dictionary, GDExtensionPtr<void>);
+	GDVIRTUAL1(_on_viewport_composition_layer_destroyed, GDExtensionConstPtr<void>);
+	GDVIRTUAL0R(TypedArray<Dictionary>, _get_viewport_composition_layer_extension_properties);
+	GDVIRTUAL0R(Dictionary, _get_viewport_composition_layer_extension_property_defaults);
+
+	Ref<OpenXRAPIExtension> get_openxr_api();
+
+	void register_extension_wrapper();
+
+	OpenXRExtensionWrapperExtension();
+	virtual ~OpenXRExtensionWrapperExtension() override;
+};
+
+#endif // OPENXR_EXTENSION_WRAPPER_EXTENSION_H

engine/modules/openxr/extensions/openxr_eye_gaze_interaction.cpp

@@ -0,0 +1,144 @@
+/**************************************************************************/
+/*  openxr_eye_gaze_interaction.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_eye_gaze_interaction.h"
+
+#include "core/config/project_settings.h"
+#include "core/os/os.h"
+
+#include "../action_map/openxr_interaction_profile_metadata.h"
+#include "../openxr_api.h"
+
+OpenXREyeGazeInteractionExtension *OpenXREyeGazeInteractionExtension::singleton = nullptr;
+
+OpenXREyeGazeInteractionExtension *OpenXREyeGazeInteractionExtension::get_singleton() {
+	ERR_FAIL_NULL_V(singleton, nullptr);
+	return singleton;
+}
+
+OpenXREyeGazeInteractionExtension::OpenXREyeGazeInteractionExtension() {
+	singleton = this;
+}
+
+OpenXREyeGazeInteractionExtension::~OpenXREyeGazeInteractionExtension() {
+	singleton = nullptr;
+}
+
+HashMap<String, bool *> OpenXREyeGazeInteractionExtension::get_requested_extensions() {
+	HashMap<String, bool *> request_extensions;
+
+	// Only enable this extension when requested.
+	// We still register our meta data or the action map editor will fail.
+	if (GLOBAL_GET("xr/openxr/extensions/eye_gaze_interaction") && (!OS::get_singleton()->has_feature("mobile") || OS::get_singleton()->has_feature(XR_EXT_EYE_GAZE_INTERACTION_EXTENSION_NAME))) {
+		request_extensions[XR_EXT_EYE_GAZE_INTERACTION_EXTENSION_NAME] = &available;
+	}
+
+	return request_extensions;
+}
+
+void *OpenXREyeGazeInteractionExtension::set_system_properties_and_get_next_pointer(void *p_next_pointer) {
+	if (!available) {
+		return p_next_pointer;
+	}
+
+	properties.type = XR_TYPE_SYSTEM_EYE_GAZE_INTERACTION_PROPERTIES_EXT;
+	properties.next = p_next_pointer;
+	properties.supportsEyeGazeInteraction = false;
+
+	return &properties;
+}
+
+PackedStringArray OpenXREyeGazeInteractionExtension::get_suggested_tracker_names() {
+	PackedStringArray arr = { "/user/eyes_ext" };
+	return arr;
+}
+
+bool OpenXREyeGazeInteractionExtension::is_available() {
+	return available;
+}
+
+bool OpenXREyeGazeInteractionExtension::supports_eye_gaze_interaction() {
+	// The extension being available only means that the OpenXR Runtime supports the extension.
+	// The `supportsEyeGazeInteraction` is set to true if the device also supports this.
+	// Thus both need to be true.
+	// In addition, on mobile runtimes, the proper permission needs to be granted.
+	if (available && properties.supportsEyeGazeInteraction) {
+		return !OS::get_singleton()->has_feature("mobile") || OS::get_singleton()->has_feature("PERMISSION_XR_EXT_eye_gaze_interaction");
+	}
+
+	return false;
+}
+
+void OpenXREyeGazeInteractionExtension::on_register_metadata() {
+	OpenXRInteractionProfileMetadata *metadata = OpenXRInteractionProfileMetadata::get_singleton();
+	ERR_FAIL_NULL(metadata);
+
+	// Eyes top path
+	metadata->register_top_level_path("Eye gaze tracker", "/user/eyes_ext", XR_EXT_EYE_GAZE_INTERACTION_EXTENSION_NAME);
+
+	// Eye gaze interaction
+	metadata->register_interaction_profile("Eye gaze", "/interaction_profiles/ext/eye_gaze_interaction", XR_EXT_EYE_GAZE_INTERACTION_EXTENSION_NAME);
+	metadata->register_io_path("/interaction_profiles/ext/eye_gaze_interaction", "Gaze pose", "/user/eyes_ext", "/user/eyes_ext/input/gaze_ext/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+}
+
+bool OpenXREyeGazeInteractionExtension::get_eye_gaze_pose(double p_dist, Vector3 &r_eye_pose) {
+	OpenXRAPI *openxr_api = OpenXRAPI::get_singleton();
+	ERR_FAIL_NULL_V(openxr_api, false);
+
+	if (!init_eye_gaze_pose) {
+		init_eye_gaze_pose = true;
+
+		eye_tracker = openxr_api->find_tracker("/user/eyes_ext");
+		if (eye_tracker.is_null()) {
+			WARN_PRINT("Couldn't obtain eye tracker");
+		}
+
+		eye_action = openxr_api->find_action("eye_gaze_pose");
+		if (eye_action.is_null()) {
+			WARN_PRINT("Couldn't obtain pose action for `eye_gaze_pose`, make sure to add this to your action map.");
+		}
+	}
+
+	if (eye_tracker.is_null() || eye_action.is_null()) {
+		return false;
+	}
+
+	Transform3D eye_transform;
+	Vector3 linear_velocity;
+	Vector3 angular_velocity;
+	XRPose::TrackingConfidence confidence = openxr_api->get_action_pose(eye_action, eye_tracker, eye_transform, linear_velocity, angular_velocity);
+	if (confidence == XRPose::XR_TRACKING_CONFIDENCE_NONE) {
+		return false;
+	}
+
+	r_eye_pose = eye_transform.origin + eye_transform.basis[2] * p_dist;
+
+	return true;
+}

engine/modules/openxr/extensions/openxr_eye_gaze_interaction.h

@@ -0,0 +1,66 @@
+/**************************************************************************/
+/*  openxr_eye_gaze_interaction.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.                 */
+/**************************************************************************/
+
+#ifndef OPENXR_EYE_GAZE_INTERACTION_H
+#define OPENXR_EYE_GAZE_INTERACTION_H
+
+#include "openxr_extension_wrapper.h"
+
+class OpenXREyeGazeInteractionExtension : public OpenXRExtensionWrapper {
+public:
+	static OpenXREyeGazeInteractionExtension *get_singleton();
+
+	OpenXREyeGazeInteractionExtension();
+	~OpenXREyeGazeInteractionExtension();
+
+	virtual HashMap<String, bool *> get_requested_extensions() override;
+	virtual void *set_system_properties_and_get_next_pointer(void *p_next_pointer) override;
+
+	PackedStringArray get_suggested_tracker_names() override;
+
+	bool is_available();
+	bool supports_eye_gaze_interaction();
+
+	virtual void on_register_metadata() override;
+
+	bool get_eye_gaze_pose(double p_dist, Vector3 &r_eye_pose);
+
+private:
+	static OpenXREyeGazeInteractionExtension *singleton;
+
+	bool available = false;
+	XrSystemEyeGazeInteractionPropertiesEXT properties;
+
+	bool init_eye_gaze_pose = false;
+	RID eye_tracker;
+	RID eye_action;
+};
+
+#endif // OPENXR_EYE_GAZE_INTERACTION_H

engine/modules/openxr/extensions/openxr_fb_display_refresh_rate_extension.cpp

@@ -0,0 +1,145 @@
+/**************************************************************************/
+/*  openxr_fb_display_refresh_rate_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_fb_display_refresh_rate_extension.h"
+#include "../openxr_interface.h"
+
+OpenXRDisplayRefreshRateExtension *OpenXRDisplayRefreshRateExtension::singleton = nullptr;
+
+OpenXRDisplayRefreshRateExtension *OpenXRDisplayRefreshRateExtension::get_singleton() {
+	return singleton;
+}
+
+OpenXRDisplayRefreshRateExtension::OpenXRDisplayRefreshRateExtension() {
+	singleton = this;
+}
+
+OpenXRDisplayRefreshRateExtension::~OpenXRDisplayRefreshRateExtension() {
+	display_refresh_rate_ext = false;
+}
+
+HashMap<String, bool *> OpenXRDisplayRefreshRateExtension::get_requested_extensions() {
+	HashMap<String, bool *> request_extensions;
+
+	request_extensions[XR_FB_DISPLAY_REFRESH_RATE_EXTENSION_NAME] = &display_refresh_rate_ext;
+
+	return request_extensions;
+}
+
+void OpenXRDisplayRefreshRateExtension::on_instance_created(const XrInstance p_instance) {
+	if (display_refresh_rate_ext) {
+		EXT_INIT_XR_FUNC(xrEnumerateDisplayRefreshRatesFB);
+		EXT_INIT_XR_FUNC(xrGetDisplayRefreshRateFB);
+		EXT_INIT_XR_FUNC(xrRequestDisplayRefreshRateFB);
+	}
+}
+
+void OpenXRDisplayRefreshRateExtension::on_instance_destroyed() {
+	display_refresh_rate_ext = false;
+}
+
+bool OpenXRDisplayRefreshRateExtension::on_event_polled(const XrEventDataBuffer &event) {
+	switch (event.type) {
+		case XR_TYPE_EVENT_DATA_DISPLAY_REFRESH_RATE_CHANGED_FB: {
+			const XrEventDataDisplayRefreshRateChangedFB *event_fb = (XrEventDataDisplayRefreshRateChangedFB *)&event;
+
+			OpenXRInterface *xr_interface = OpenXRAPI::get_singleton()->get_xr_interface();
+			if (xr_interface) {
+				xr_interface->on_refresh_rate_changes(event_fb->toDisplayRefreshRate);
+			}
+
+			return true;
+		} break;
+		default:
+			return false;
+	}
+}
+
+float OpenXRDisplayRefreshRateExtension::get_refresh_rate() const {
+	float refresh_rate = 0.0;
+
+	if (display_refresh_rate_ext) {
+		float rate;
+		XrResult result = xrGetDisplayRefreshRateFB(OpenXRAPI::get_singleton()->get_session(), &rate);
+		if (XR_FAILED(result)) {
+			print_line("OpenXR: Failed to obtain refresh rate [", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+		} else {
+			refresh_rate = rate;
+		}
+	}
+
+	return refresh_rate;
+}
+
+void OpenXRDisplayRefreshRateExtension::set_refresh_rate(float p_refresh_rate) {
+	if (display_refresh_rate_ext) {
+		XrResult result = xrRequestDisplayRefreshRateFB(OpenXRAPI::get_singleton()->get_session(), p_refresh_rate);
+		if (XR_FAILED(result)) {
+			print_line("OpenXR: Failed to set refresh rate [", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+		}
+	}
+}
+
+Array OpenXRDisplayRefreshRateExtension::get_available_refresh_rates() const {
+	Array arr;
+	XrResult result;
+
+	if (display_refresh_rate_ext) {
+		uint32_t display_refresh_rate_count = 0;
+		result = xrEnumerateDisplayRefreshRatesFB(OpenXRAPI::get_singleton()->get_session(), 0, &display_refresh_rate_count, nullptr);
+		if (XR_FAILED(result)) {
+			print_line("OpenXR: Failed to obtain refresh rates count [", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+		}
+
+		if (display_refresh_rate_count > 0) {
+			float *display_refresh_rates = (float *)memalloc(sizeof(float) * display_refresh_rate_count);
+			if (display_refresh_rates == nullptr) {
+				print_line("OpenXR: Failed to obtain refresh rates memory buffer [", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+				return arr;
+			}
+
+			result = xrEnumerateDisplayRefreshRatesFB(OpenXRAPI::get_singleton()->get_session(), display_refresh_rate_count, &display_refresh_rate_count, display_refresh_rates);
+			if (XR_FAILED(result)) {
+				print_line("OpenXR: Failed to obtain refresh rates count [", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+				memfree(display_refresh_rates);
+				return arr;
+			}
+
+			for (uint32_t i = 0; i < display_refresh_rate_count; i++) {
+				float refresh_rate = display_refresh_rates[i];
+				arr.push_back(Variant(refresh_rate));
+			}
+
+			memfree(display_refresh_rates);
+		}
+	}
+
+	return arr;
+}

engine/modules/openxr/extensions/openxr_fb_display_refresh_rate_extension.h

@@ -0,0 +1,72 @@
+/**************************************************************************/
+/*  openxr_fb_display_refresh_rate_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.                 */
+/**************************************************************************/
+
+#ifndef OPENXR_FB_DISPLAY_REFRESH_RATE_EXTENSION_H
+#define OPENXR_FB_DISPLAY_REFRESH_RATE_EXTENSION_H
+
+// This extension gives us access to the possible display refresh rates
+// supported by the HMD.
+// While this is an FB extension it has been adopted by most runtimes and
+// will likely become core in the near future.
+
+#include "../openxr_api.h"
+#include "../util.h"
+#include "openxr_extension_wrapper.h"
+
+class OpenXRDisplayRefreshRateExtension : public OpenXRExtensionWrapper {
+public:
+	static OpenXRDisplayRefreshRateExtension *get_singleton();
+
+	OpenXRDisplayRefreshRateExtension();
+	virtual ~OpenXRDisplayRefreshRateExtension() override;
+
+	virtual HashMap<String, bool *> get_requested_extensions() override;
+
+	virtual void on_instance_created(const XrInstance p_instance) override;
+	virtual void on_instance_destroyed() override;
+	virtual bool on_event_polled(const XrEventDataBuffer &event) override;
+
+	float get_refresh_rate() const;
+	void set_refresh_rate(float p_refresh_rate);
+
+	Array get_available_refresh_rates() const;
+
+private:
+	static OpenXRDisplayRefreshRateExtension *singleton;
+
+	bool display_refresh_rate_ext = false;
+
+	// OpenXR API call wrappers
+	EXT_PROTO_XRRESULT_FUNC4(xrEnumerateDisplayRefreshRatesFB, (XrSession), session, (uint32_t), displayRefreshRateCapacityInput, (uint32_t *), displayRefreshRateCountOutput, (float *), displayRefreshRates);
+	EXT_PROTO_XRRESULT_FUNC2(xrGetDisplayRefreshRateFB, (XrSession), session, (float *), display_refresh_rate);
+	EXT_PROTO_XRRESULT_FUNC2(xrRequestDisplayRefreshRateFB, (XrSession), session, (float), display_refresh_rate);
+};
+
+#endif // OPENXR_FB_DISPLAY_REFRESH_RATE_EXTENSION_H

engine/modules/openxr/extensions/openxr_fb_foveation_extension.cpp

@@ -0,0 +1,183 @@
+/**************************************************************************/
+/*  openxr_fb_foveation_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_fb_foveation_extension.h"
+#include "core/config/project_settings.h"
+
+OpenXRFBFoveationExtension *OpenXRFBFoveationExtension::singleton = nullptr;
+
+OpenXRFBFoveationExtension *OpenXRFBFoveationExtension::get_singleton() {
+	return singleton;
+}
+
+OpenXRFBFoveationExtension::OpenXRFBFoveationExtension(const String &p_rendering_driver) {
+	singleton = this;
+	rendering_driver = p_rendering_driver;
+	swapchain_update_state_ext = OpenXRFBUpdateSwapchainExtension::get_singleton();
+	int fov_level = GLOBAL_GET("xr/openxr/foveation_level");
+	if (fov_level >= 0 && fov_level < 4) {
+		foveation_level = XrFoveationLevelFB(fov_level);
+	}
+	bool fov_dyn = GLOBAL_GET("xr/openxr/foveation_dynamic");
+	foveation_dynamic = fov_dyn ? XR_FOVEATION_DYNAMIC_LEVEL_ENABLED_FB : XR_FOVEATION_DYNAMIC_DISABLED_FB;
+
+	swapchain_create_info_foveation_fb.type = XR_TYPE_SWAPCHAIN_CREATE_INFO_FOVEATION_FB;
+	swapchain_create_info_foveation_fb.next = nullptr;
+	swapchain_create_info_foveation_fb.flags = 0;
+}
+
+OpenXRFBFoveationExtension::~OpenXRFBFoveationExtension() {
+	singleton = nullptr;
+	swapchain_update_state_ext = nullptr;
+}
+
+HashMap<String, bool *> OpenXRFBFoveationExtension::get_requested_extensions() {
+	HashMap<String, bool *> request_extensions;
+
+	if (rendering_driver == "vulkan") {
+		// This is currently only supported on OpenGL, but we may add Vulkan support in the future...
+
+	} else if (rendering_driver == "opengl3") {
+		request_extensions[XR_FB_FOVEATION_EXTENSION_NAME] = &fb_foveation_ext;
+		request_extensions[XR_FB_FOVEATION_CONFIGURATION_EXTENSION_NAME] = &fb_foveation_configuration_ext;
+	}
+
+	return request_extensions;
+}
+
+void OpenXRFBFoveationExtension::on_instance_created(const XrInstance p_instance) {
+	if (fb_foveation_ext) {
+		EXT_INIT_XR_FUNC(xrCreateFoveationProfileFB);
+		EXT_INIT_XR_FUNC(xrDestroyFoveationProfileFB);
+	}
+
+	if (fb_foveation_configuration_ext) {
+		// nothing to register here...
+	}
+}
+
+void OpenXRFBFoveationExtension::on_instance_destroyed() {
+	fb_foveation_ext = false;
+	fb_foveation_configuration_ext = false;
+}
+
+bool OpenXRFBFoveationExtension::is_enabled() const {
+	return swapchain_update_state_ext != nullptr && swapchain_update_state_ext->is_enabled() && fb_foveation_ext && fb_foveation_configuration_ext;
+}
+
+void *OpenXRFBFoveationExtension::set_swapchain_create_info_and_get_next_pointer(void *p_next_pointer) {
+	if (is_enabled()) {
+		swapchain_create_info_foveation_fb.next = p_next_pointer;
+		return &swapchain_create_info_foveation_fb;
+	} else {
+		return p_next_pointer;
+	}
+}
+
+void OpenXRFBFoveationExtension::on_main_swapchains_created() {
+	update_profile();
+}
+
+XrFoveationLevelFB OpenXRFBFoveationExtension::get_foveation_level() const {
+	return foveation_level;
+}
+
+void OpenXRFBFoveationExtension::set_foveation_level(XrFoveationLevelFB p_foveation_level) {
+	foveation_level = p_foveation_level;
+
+	// Update profile will do nothing if we're not yet initialized.
+	update_profile();
+}
+
+XrFoveationDynamicFB OpenXRFBFoveationExtension::get_foveation_dynamic() const {
+	return foveation_dynamic;
+}
+
+void OpenXRFBFoveationExtension::set_foveation_dynamic(XrFoveationDynamicFB p_foveation_dynamic) {
+	foveation_dynamic = p_foveation_dynamic;
+
+	// Update profile will do nothing if we're not yet initialized.
+	update_profile();
+}
+
+void OpenXRFBFoveationExtension::_update_profile() {
+	// Must be called from rendering thread!
+	ERR_NOT_ON_RENDER_THREAD;
+
+	OpenXRFBFoveationExtension *fov_ext = OpenXRFBFoveationExtension::get_singleton();
+	ERR_FAIL_NULL(fov_ext);
+
+	if (!fov_ext->is_enabled()) {
+		return;
+	}
+
+	OpenXRAPI *openxr_api = OpenXRAPI::get_singleton();
+	ERR_FAIL_NULL(openxr_api);
+
+	XrSwapchain main_color_swapchain = openxr_api->get_color_swapchain();
+	if (main_color_swapchain == XR_NULL_HANDLE) {
+		// Our swapchain hasn't been created yet, we'll call this again once it has.
+		return;
+	}
+
+	XrFoveationLevelProfileCreateInfoFB level_profile_create_info;
+	level_profile_create_info.type = XR_TYPE_FOVEATION_LEVEL_PROFILE_CREATE_INFO_FB;
+	level_profile_create_info.next = nullptr;
+	level_profile_create_info.level = fov_ext->foveation_level;
+	level_profile_create_info.verticalOffset = 0.0f;
+	level_profile_create_info.dynamic = fov_ext->foveation_dynamic;
+
+	XrFoveationProfileCreateInfoFB profile_create_info;
+	profile_create_info.type = XR_TYPE_FOVEATION_PROFILE_CREATE_INFO_FB;
+	profile_create_info.next = &level_profile_create_info;
+
+	XrFoveationProfileFB foveation_profile;
+	XrResult result = fov_ext->xrCreateFoveationProfileFB(openxr_api->get_session(), &profile_create_info, &foveation_profile);
+	if (XR_FAILED(result)) {
+		print_line("OpenXR: Unable to create the foveation profile [", openxr_api->get_error_string(result), "]");
+		return;
+	}
+
+	XrSwapchainStateFoveationFB foveation_update_state;
+	foveation_update_state.type = XR_TYPE_SWAPCHAIN_STATE_FOVEATION_FB;
+	foveation_update_state.profile = foveation_profile;
+
+	result = fov_ext->swapchain_update_state_ext->xrUpdateSwapchainFB(main_color_swapchain, (XrSwapchainStateBaseHeaderFB *)&foveation_update_state);
+	if (XR_FAILED(result)) {
+		print_line("OpenXR: Unable to update the swapchain [", openxr_api->get_error_string(result), "]");
+
+		// We still want to destroy our profile so keep going...
+	}
+
+	result = fov_ext->xrDestroyFoveationProfileFB(foveation_profile);
+	if (XR_FAILED(result)) {
+		print_line("OpenXR: Unable to destroy the foveation profile [", openxr_api->get_error_string(result), "]");
+	}
+}

engine/modules/openxr/extensions/openxr_fb_foveation_extension.h

@@ -0,0 +1,104 @@
+/**************************************************************************/
+/*  openxr_fb_foveation_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.                 */
+/**************************************************************************/
+
+#ifndef OPENXR_FB_FOVEATION_EXTENSION_H
+#define OPENXR_FB_FOVEATION_EXTENSION_H
+
+// This extension implements the FB Foveation extension.
+// This is an extension Meta added due to VRS being unavailable on Android.
+// Other Android based devices are implementing this as well, see:
+// https://github.khronos.org/OpenXR-Inventory/extension_support.html#XR_FB_foveation
+
+// Note: Currently we only support this for OpenGL.
+// This extension works on enabling foveated rendering on the swapchain.
+// Vulkan does not render 3D content directly to the swapchain image
+// hence this extension can't be used.
+
+#include "../openxr_api.h"
+#include "../util.h"
+#include "openxr_extension_wrapper.h"
+#include "openxr_fb_update_swapchain_extension.h"
+
+class OpenXRFBFoveationExtension : public OpenXRExtensionWrapper {
+public:
+	static OpenXRFBFoveationExtension *get_singleton();
+
+	OpenXRFBFoveationExtension(const String &p_rendering_driver);
+	virtual ~OpenXRFBFoveationExtension() override;
+
+	virtual HashMap<String, bool *> get_requested_extensions() override;
+
+	virtual void on_instance_created(const XrInstance p_instance) override;
+	virtual void on_instance_destroyed() override;
+
+	virtual void *set_swapchain_create_info_and_get_next_pointer(void *p_next_pointer) override;
+
+	virtual void on_main_swapchains_created() override;
+
+	bool is_enabled() const;
+
+	XrFoveationLevelFB get_foveation_level() const;
+	void set_foveation_level(XrFoveationLevelFB p_foveation_level);
+
+	XrFoveationDynamicFB get_foveation_dynamic() const;
+	void set_foveation_dynamic(XrFoveationDynamicFB p_foveation_dynamic);
+
+private:
+	static OpenXRFBFoveationExtension *singleton;
+
+	// Setup
+	String rendering_driver;
+	bool fb_foveation_ext = false;
+	bool fb_foveation_configuration_ext = false;
+
+	// Configuration
+	XrFoveationLevelFB foveation_level = XR_FOVEATION_LEVEL_NONE_FB;
+	XrFoveationDynamicFB foveation_dynamic = XR_FOVEATION_DYNAMIC_DISABLED_FB;
+
+	static void _update_profile();
+
+	void update_profile() {
+		// If we're rendering on a separate thread, we may still be processing the last frame, don't communicate this till we're ready...
+		RenderingServer *rendering_server = RenderingServer::get_singleton();
+		ERR_FAIL_NULL(rendering_server);
+
+		rendering_server->call_on_render_thread(callable_mp_static(&OpenXRFBFoveationExtension::_update_profile));
+	}
+
+	// Enable foveation on this swapchain
+	XrSwapchainCreateInfoFoveationFB swapchain_create_info_foveation_fb;
+	OpenXRFBUpdateSwapchainExtension *swapchain_update_state_ext = nullptr;
+
+	// OpenXR API call wrappers
+	EXT_PROTO_XRRESULT_FUNC3(xrCreateFoveationProfileFB, (XrSession), session, (const XrFoveationProfileCreateInfoFB *), create_info, (XrFoveationProfileFB *), profile);
+	EXT_PROTO_XRRESULT_FUNC1(xrDestroyFoveationProfileFB, (XrFoveationProfileFB), profile);
+};
+
+#endif // OPENXR_FB_FOVEATION_EXTENSION_H

engine/modules/openxr/extensions/openxr_fb_update_swapchain_extension.cpp

@@ -0,0 +1,102 @@
+/**************************************************************************/
+/*  openxr_fb_update_swapchain_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_fb_update_swapchain_extension.h"
+
+// Always include this as late as possible.
+#include "../openxr_platform_inc.h"
+
+OpenXRFBUpdateSwapchainExtension *OpenXRFBUpdateSwapchainExtension::singleton = nullptr;
+
+OpenXRFBUpdateSwapchainExtension *OpenXRFBUpdateSwapchainExtension::get_singleton() {
+	return singleton;
+}
+
+OpenXRFBUpdateSwapchainExtension::OpenXRFBUpdateSwapchainExtension(const String &p_rendering_driver) {
+	singleton = this;
+	rendering_driver = p_rendering_driver;
+}
+
+OpenXRFBUpdateSwapchainExtension::~OpenXRFBUpdateSwapchainExtension() {
+	singleton = nullptr;
+}
+
+HashMap<String, bool *> OpenXRFBUpdateSwapchainExtension::get_requested_extensions() {
+	HashMap<String, bool *> request_extensions;
+
+	request_extensions[XR_FB_SWAPCHAIN_UPDATE_STATE_EXTENSION_NAME] = &fb_swapchain_update_state_ext;
+
+	if (rendering_driver == "vulkan") {
+#ifdef XR_USE_GRAPHICS_API_VULKAN
+		request_extensions[XR_FB_SWAPCHAIN_UPDATE_STATE_VULKAN_EXTENSION_NAME] = &fb_swapchain_update_state_vulkan_ext;
+#endif
+	} else if (rendering_driver == "opengl3") {
+#ifdef XR_USE_GRAPHICS_API_OPENGL_ES
+		request_extensions[XR_FB_SWAPCHAIN_UPDATE_STATE_OPENGL_ES_EXTENSION_NAME] = &fb_swapchain_update_state_opengles_ext;
+#endif
+	}
+
+	return request_extensions;
+}
+
+void OpenXRFBUpdateSwapchainExtension::on_instance_created(const XrInstance p_instance) {
+	if (fb_swapchain_update_state_ext) {
+		EXT_INIT_XR_FUNC(xrUpdateSwapchainFB);
+		EXT_INIT_XR_FUNC(xrGetSwapchainStateFB);
+	}
+
+	if (fb_swapchain_update_state_vulkan_ext) {
+		// nothing to register here...
+	}
+
+	if (fb_swapchain_update_state_opengles_ext) {
+		// nothing to register here...
+	}
+}
+
+void OpenXRFBUpdateSwapchainExtension::on_instance_destroyed() {
+	fb_swapchain_update_state_ext = false;
+	fb_swapchain_update_state_vulkan_ext = false;
+	fb_swapchain_update_state_opengles_ext = false;
+}
+
+bool OpenXRFBUpdateSwapchainExtension::is_enabled() const {
+	if (rendering_driver == "vulkan") {
+		return fb_swapchain_update_state_ext && fb_swapchain_update_state_vulkan_ext;
+	} else if (rendering_driver == "opengl3") {
+#ifdef XR_USE_GRAPHICS_API_OPENGL_ES
+		return fb_swapchain_update_state_ext && fb_swapchain_update_state_opengles_ext;
+#else
+		return fb_swapchain_update_state_ext;
+#endif
+	}
+
+	return false;
+}

engine/modules/openxr/extensions/openxr_fb_update_swapchain_extension.h

@@ -0,0 +1,73 @@
+/**************************************************************************/
+/*  openxr_fb_update_swapchain_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.                 */
+/**************************************************************************/
+
+#ifndef OPENXR_FB_UPDATE_SWAPCHAIN_EXTENSION_H
+#define OPENXR_FB_UPDATE_SWAPCHAIN_EXTENSION_H
+
+// This extension implements the FB update swapchain extension.
+// This is an extension Meta added to further configure the swapchain.
+// Other Android based devices are implementing this as well, see:
+// https://github.khronos.org/OpenXR-Inventory/extension_support.html#XR_FB_swapchain_update_state
+
+#include "../openxr_api.h"
+#include "../util.h"
+#include "openxr_extension_wrapper.h"
+
+class OpenXRFBUpdateSwapchainExtension : public OpenXRExtensionWrapper {
+	friend class OpenXRFBFoveationExtension;
+
+public:
+	static OpenXRFBUpdateSwapchainExtension *get_singleton();
+
+	OpenXRFBUpdateSwapchainExtension(const String &p_rendering_driver);
+	virtual ~OpenXRFBUpdateSwapchainExtension() override;
+
+	virtual HashMap<String, bool *> get_requested_extensions() override;
+
+	virtual void on_instance_created(const XrInstance p_instance) override;
+	virtual void on_instance_destroyed() override;
+
+	bool is_enabled() const;
+
+private:
+	static OpenXRFBUpdateSwapchainExtension *singleton;
+
+	// Setup
+	String rendering_driver;
+	bool fb_swapchain_update_state_ext = false;
+	bool fb_swapchain_update_state_vulkan_ext = false;
+	bool fb_swapchain_update_state_opengles_ext = false;
+
+	// OpenXR API call wrappers
+	EXT_PROTO_XRRESULT_FUNC2(xrUpdateSwapchainFB, (XrSwapchain), swapchain, (const XrSwapchainStateBaseHeaderFB *), state);
+	EXT_PROTO_XRRESULT_FUNC2(xrGetSwapchainStateFB, (XrSwapchain), swapchain, (XrSwapchainStateBaseHeaderFB *), state);
+};
+
+#endif // OPENXR_FB_UPDATE_SWAPCHAIN_EXTENSION_H

engine/modules/openxr/extensions/openxr_hand_interaction_extension.cpp

@@ -0,0 +1,97 @@
+/**************************************************************************/
+/*  openxr_hand_interaction_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_hand_interaction_extension.h"
+
+#include "../action_map/openxr_interaction_profile_metadata.h"
+#include "core/config/project_settings.h"
+
+OpenXRHandInteractionExtension *OpenXRHandInteractionExtension::singleton = nullptr;
+
+OpenXRHandInteractionExtension *OpenXRHandInteractionExtension::get_singleton() {
+	return singleton;
+}
+
+OpenXRHandInteractionExtension::OpenXRHandInteractionExtension() {
+	singleton = this;
+}
+
+OpenXRHandInteractionExtension::~OpenXRHandInteractionExtension() {
+	singleton = nullptr;
+}
+
+HashMap<String, bool *> OpenXRHandInteractionExtension::get_requested_extensions() {
+	HashMap<String, bool *> request_extensions;
+
+	// Only enable this extension when requested.
+	// We still register our meta data or the action map editor will fail.
+	if (GLOBAL_GET("xr/openxr/extensions/hand_interaction_profile")) {
+		request_extensions[XR_EXT_HAND_INTERACTION_EXTENSION_NAME] = &available;
+	}
+
+	return request_extensions;
+}
+
+bool OpenXRHandInteractionExtension::is_available() {
+	return available;
+}
+
+void OpenXRHandInteractionExtension::on_register_metadata() {
+	OpenXRInteractionProfileMetadata *metadata = OpenXRInteractionProfileMetadata::get_singleton();
+	ERR_FAIL_NULL(metadata);
+
+	// Hand interaction profile
+	metadata->register_interaction_profile("Hand interaction", "/interaction_profiles/ext/hand_interaction_ext", XR_EXT_HAND_INTERACTION_EXTENSION_NAME);
+	metadata->register_io_path("/interaction_profiles/ext/hand_interaction_ext", "Grip pose", "/user/hand/left", "/user/hand/left/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/ext/hand_interaction_ext", "Grip pose", "/user/hand/right", "/user/hand/right/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/ext/hand_interaction_ext", "Aim pose", "/user/hand/left", "/user/hand/left/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/ext/hand_interaction_ext", "Aim pose", "/user/hand/right", "/user/hand/right/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/ext/hand_interaction_ext", "Pinch pose", "/user/hand/left", "/user/hand/left/input/pinch_ext/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/ext/hand_interaction_ext", "Pinch pose", "/user/hand/right", "/user/hand/right/input/pinch_ext/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/ext/hand_interaction_ext", "Poke pose", "/user/hand/left", "/user/hand/left/input/poke_ext/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/ext/hand_interaction_ext", "Poke pose", "/user/hand/right", "/user/hand/right/input/poke_ext/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/ext/hand_interaction_ext", "Palm pose", "/user/hand/left", "/user/hand/left/input/palm_ext/pose", XR_EXT_PALM_POSE_EXTENSION_NAME, OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/ext/hand_interaction_ext", "Palm pose", "/user/hand/right", "/user/hand/right/input/palm_ext/pose", XR_EXT_PALM_POSE_EXTENSION_NAME, OpenXRAction::OPENXR_ACTION_POSE);
+
+	metadata->register_io_path("/interaction_profiles/ext/hand_interaction_ext", "Pinch", "/user/hand/left", "/user/hand/left/input/pinch_ext/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/ext/hand_interaction_ext", "Pinch", "/user/hand/right", "/user/hand/right/input/pinch_ext/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/ext/hand_interaction_ext", "Pinch ready", "/user/hand/left", "/user/hand/left/input/pinch_ext/ready_ext", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/ext/hand_interaction_ext", "Pinch ready", "/user/hand/right", "/user/hand/right/input/pinch_ext/ready_ext", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/ext/hand_interaction_ext", "Aim activate", "/user/hand/left", "/user/hand/left/input/aim_activate_ext/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/ext/hand_interaction_ext", "Aim activate", "/user/hand/right", "/user/hand/right/input/aim_activate_ext/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/ext/hand_interaction_ext", "Aim activate ready", "/user/hand/left", "/user/hand/left/input/aim_activate_ext/ready_ext", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/ext/hand_interaction_ext", "Aim activate ready", "/user/hand/right", "/user/hand/right/input/aim_activate_ext/ready_ext", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/ext/hand_interaction_ext", "Grasp", "/user/hand/left", "/user/hand/left/input/grasp_ext/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/ext/hand_interaction_ext", "Grasp", "/user/hand/right", "/user/hand/right/input/grasp_ext/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/ext/hand_interaction_ext", "Grasp ready", "/user/hand/left", "/user/hand/left/input/grasp_ext/ready_ext", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/ext/hand_interaction_ext", "Grasp ready", "/user/hand/right", "/user/hand/right/input/grasp_ext/ready_ext", "", OpenXRAction::OPENXR_ACTION_BOOL);
+}

engine/modules/openxr/extensions/openxr_hand_interaction_extension.h

@@ -0,0 +1,72 @@
+/**************************************************************************/
+/*  openxr_hand_interaction_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.                 */
+/**************************************************************************/
+
+#ifndef OPENXR_HAND_INTERACTION_EXTENSION_H
+#define OPENXR_HAND_INTERACTION_EXTENSION_H
+
+#include "openxr_extension_wrapper.h"
+
+// When supported the hand interaction extension introduces an interaction
+// profile that becomes active when the user either lets go of their
+// controllers or isn't using controllers at all.
+//
+// The OpenXR specification states that all XR runtimes that support this
+// interaction profile should also allow it's controller to use this
+// interaction profile.
+// This means that if you only supply this interaction profile in your
+// action map, it should work both when the player is holding a controller
+// or using visual hand tracking.
+//
+// This allows easier portability between games that use controller
+// tracking or hand tracking.
+//
+// See: https://registry.khronos.org/OpenXR/specs/1.0/html/xrspec.html#XR_EXT_hand_interaction
+// for more information.
+
+class OpenXRHandInteractionExtension : public OpenXRExtensionWrapper {
+public:
+	static OpenXRHandInteractionExtension *get_singleton();
+
+	OpenXRHandInteractionExtension();
+	virtual ~OpenXRHandInteractionExtension() override;
+
+	virtual HashMap<String, bool *> get_requested_extensions() override;
+
+	bool is_available();
+
+	virtual void on_register_metadata() override;
+
+private:
+	static OpenXRHandInteractionExtension *singleton;
+
+	bool available = false;
+};
+
+#endif // OPENXR_HAND_INTERACTION_EXTENSION_H

engine/modules/openxr/extensions/openxr_hand_tracking_extension.cpp

@@ -0,0 +1,454 @@
+/**************************************************************************/
+/*  openxr_hand_tracking_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_hand_tracking_extension.h"
+
+#include "../openxr_api.h"
+
+#include "core/config/project_settings.h"
+#include "core/string/print_string.h"
+#include "servers/xr_server.h"
+
+#include <openxr/openxr.h>
+
+OpenXRHandTrackingExtension *OpenXRHandTrackingExtension::singleton = nullptr;
+
+OpenXRHandTrackingExtension *OpenXRHandTrackingExtension::get_singleton() {
+	return singleton;
+}
+
+OpenXRHandTrackingExtension::OpenXRHandTrackingExtension() {
+	singleton = this;
+
+	// Make sure this is cleared until we actually request it
+	handTrackingSystemProperties.supportsHandTracking = false;
+}
+
+OpenXRHandTrackingExtension::~OpenXRHandTrackingExtension() {
+	singleton = nullptr;
+}
+
+HashMap<String, bool *> OpenXRHandTrackingExtension::get_requested_extensions() {
+	HashMap<String, bool *> request_extensions;
+
+	request_extensions[XR_EXT_HAND_TRACKING_EXTENSION_NAME] = &hand_tracking_ext;
+	request_extensions[XR_EXT_HAND_JOINTS_MOTION_RANGE_EXTENSION_NAME] = &hand_motion_range_ext;
+	request_extensions[XR_EXT_HAND_TRACKING_DATA_SOURCE_EXTENSION_NAME] = &hand_tracking_source_ext;
+
+	return request_extensions;
+}
+
+void OpenXRHandTrackingExtension::on_instance_created(const XrInstance p_instance) {
+	if (hand_tracking_ext) {
+		EXT_INIT_XR_FUNC(xrCreateHandTrackerEXT);
+		EXT_INIT_XR_FUNC(xrDestroyHandTrackerEXT);
+		EXT_INIT_XR_FUNC(xrLocateHandJointsEXT);
+
+		hand_tracking_ext = xrCreateHandTrackerEXT_ptr && xrDestroyHandTrackerEXT_ptr && xrLocateHandJointsEXT_ptr;
+	}
+}
+
+void OpenXRHandTrackingExtension::on_session_destroyed() {
+	cleanup_hand_tracking();
+}
+
+void OpenXRHandTrackingExtension::on_instance_destroyed() {
+	xrCreateHandTrackerEXT_ptr = nullptr;
+	xrDestroyHandTrackerEXT_ptr = nullptr;
+	xrLocateHandJointsEXT_ptr = nullptr;
+}
+
+void *OpenXRHandTrackingExtension::set_system_properties_and_get_next_pointer(void *p_next_pointer) {
+	if (!hand_tracking_ext) {
+		// not supported...
+		return p_next_pointer;
+	}
+
+	handTrackingSystemProperties = {
+		XR_TYPE_SYSTEM_HAND_TRACKING_PROPERTIES_EXT, // type
+		p_next_pointer, // next
+		false, // supportsHandTracking
+	};
+
+	return &handTrackingSystemProperties;
+}
+
+void OpenXRHandTrackingExtension::on_state_ready() {
+	if (!handTrackingSystemProperties.supportsHandTracking) {
+		// not supported...
+		return;
+	}
+
+	// Setup our hands and reset data
+	for (int i = 0; i < OPENXR_MAX_TRACKED_HANDS; i++) {
+		// we'll do this later
+		hand_trackers[i].is_initialized = false;
+		hand_trackers[i].hand_tracker = XR_NULL_HANDLE;
+
+		hand_trackers[i].locations.isActive = false;
+
+		for (int j = 0; j < XR_HAND_JOINT_COUNT_EXT; j++) {
+			hand_trackers[i].joint_locations[j] = { 0, { { 0.0, 0.0, 0.0, 0.0 }, { 0.0, 0.0, 0.0 } }, 0.0 };
+			hand_trackers[i].joint_velocities[j] = { 0, { 0.0, 0.0, 0.0 }, { 0.0, 0.0, 0.0 } };
+		}
+	}
+}
+
+void OpenXRHandTrackingExtension::on_process() {
+	if (!handTrackingSystemProperties.supportsHandTracking) {
+		// not supported...
+		return;
+	}
+
+	// process our hands
+	const XrTime time = OpenXRAPI::get_singleton()->get_predicted_display_time();
+	if (time == 0) {
+		// we don't have timing info yet, or we're skipping a frame...
+		return;
+	}
+
+	XrResult result;
+
+	for (int i = 0; i < OPENXR_MAX_TRACKED_HANDS; i++) {
+		if (hand_trackers[i].hand_tracker == XR_NULL_HANDLE) {
+			void *next_pointer = nullptr;
+
+			// Originally not all XR runtimes supported hand tracking data sourced both from controllers and normal hand tracking.
+			// With this extension we can indicate we accept input from both sources so hand tracking data is consistently provided
+			// on runtimes that support this.
+			XrHandTrackingDataSourceEXT data_sources[2] = { XR_HAND_TRACKING_DATA_SOURCE_UNOBSTRUCTED_EXT, XR_HAND_TRACKING_DATA_SOURCE_CONTROLLER_EXT };
+			XrHandTrackingDataSourceInfoEXT data_source_info = { XR_TYPE_HAND_TRACKING_DATA_SOURCE_INFO_EXT, next_pointer, 2, data_sources };
+			if (hand_tracking_source_ext) {
+				// If supported include this info
+				next_pointer = &data_source_info;
+			}
+
+			XrHandTrackerCreateInfoEXT create_info = {
+				XR_TYPE_HAND_TRACKER_CREATE_INFO_EXT, // type
+				next_pointer, // next
+				i == 0 ? XR_HAND_LEFT_EXT : XR_HAND_RIGHT_EXT, // hand
+				XR_HAND_JOINT_SET_DEFAULT_EXT, // handJointSet
+			};
+
+			result = xrCreateHandTrackerEXT(OpenXRAPI::get_singleton()->get_session(), &create_info, &hand_trackers[i].hand_tracker);
+			if (XR_FAILED(result)) {
+				// not successful? then we do nothing.
+				print_line("OpenXR: Failed to obtain hand tracking information [", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+				hand_trackers[i].is_initialized = false;
+			} else {
+				next_pointer = nullptr;
+
+				hand_trackers[i].velocities.type = XR_TYPE_HAND_JOINT_VELOCITIES_EXT;
+				hand_trackers[i].velocities.next = next_pointer;
+				hand_trackers[i].velocities.jointCount = XR_HAND_JOINT_COUNT_EXT;
+				hand_trackers[i].velocities.jointVelocities = hand_trackers[i].joint_velocities;
+				next_pointer = &hand_trackers[i].velocities;
+
+				if (hand_tracking_source_ext) {
+					hand_trackers[i].data_source.type = XR_TYPE_HAND_TRACKING_DATA_SOURCE_STATE_EXT;
+					hand_trackers[i].data_source.next = next_pointer;
+					hand_trackers[i].data_source.isActive = false;
+					hand_trackers[i].data_source.dataSource = XrHandTrackingDataSourceEXT(0);
+					next_pointer = &hand_trackers[i].data_source;
+				}
+
+				// Needed for vendor hand tracking extensions implemented from GDExtension.
+				for (OpenXRExtensionWrapper *wrapper : OpenXRAPI::get_singleton()->get_registered_extension_wrappers()) {
+					void *np = wrapper->set_hand_joint_locations_and_get_next_pointer(i, next_pointer);
+					if (np != nullptr) {
+						next_pointer = np;
+					}
+				}
+
+				hand_trackers[i].locations.type = XR_TYPE_HAND_JOINT_LOCATIONS_EXT;
+				hand_trackers[i].locations.next = next_pointer;
+				hand_trackers[i].locations.isActive = false;
+				hand_trackers[i].locations.jointCount = XR_HAND_JOINT_COUNT_EXT;
+				hand_trackers[i].locations.jointLocations = hand_trackers[i].joint_locations;
+
+				Ref<XRHandTracker> godot_tracker;
+				godot_tracker.instantiate();
+				godot_tracker->set_tracker_hand(i == 0 ? XRPositionalTracker::TRACKER_HAND_LEFT : XRPositionalTracker::TRACKER_HAND_RIGHT);
+				godot_tracker->set_tracker_name(i == 0 ? "/user/hand_tracker/left" : "/user/hand_tracker/right");
+				XRServer::get_singleton()->add_tracker(godot_tracker);
+				hand_trackers[i].godot_tracker = godot_tracker;
+
+				hand_trackers[i].is_initialized = true;
+			}
+		}
+
+		if (hand_trackers[i].is_initialized) {
+			Ref<XRHandTracker> godot_tracker = hand_trackers[i].godot_tracker;
+			void *next_pointer = nullptr;
+
+			XrHandJointsMotionRangeInfoEXT motion_range_info = { XR_TYPE_HAND_JOINTS_MOTION_RANGE_INFO_EXT, next_pointer, hand_trackers[i].motion_range };
+			if (hand_motion_range_ext) {
+				next_pointer = &motion_range_info;
+			}
+
+			XrHandJointsLocateInfoEXT locateInfo = {
+				XR_TYPE_HAND_JOINTS_LOCATE_INFO_EXT, // type
+				next_pointer, // next
+				OpenXRAPI::get_singleton()->get_play_space(), // baseSpace
+				time, // time
+			};
+
+			result = xrLocateHandJointsEXT(hand_trackers[i].hand_tracker, &locateInfo, &hand_trackers[i].locations);
+			if (XR_FAILED(result)) {
+				// not successful? then we do nothing.
+				print_line("OpenXR: Failed to get tracking for hand", i, "[", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+				godot_tracker->set_has_tracking_data(false);
+				continue;
+			}
+
+			// For some reason an inactive controller isn't coming back as inactive but has coordinates either as NAN or very large
+			const XrPosef &palm = hand_trackers[i].joint_locations[XR_HAND_JOINT_PALM_EXT].pose;
+			if (!hand_trackers[i].locations.isActive || isnan(palm.position.x) || palm.position.x < -1000000.00 || palm.position.x > 1000000.00) {
+				hand_trackers[i].locations.isActive = false; // workaround, make sure its inactive
+			}
+
+			if (hand_trackers[i].locations.isActive) {
+				godot_tracker->set_has_tracking_data(true);
+
+				// SKELETON_RIG_HUMANOID bone adjustment. This rotation performs:
+				// OpenXR Z+ -> Godot Humanoid Y-  (Back along the bone)
+				// OpenXR Y+ -> Godot Humanoid Z- (Out the back of the hand)
+				const Quaternion bone_adjustment(0.0, -Math_SQRT12, Math_SQRT12, 0.0);
+
+				for (int joint = 0; joint < XR_HAND_JOINT_COUNT_EXT; joint++) {
+					const XrHandJointLocationEXT &location = hand_trackers[i].joint_locations[joint];
+					const XrHandJointVelocityEXT &velocity = hand_trackers[i].joint_velocities[joint];
+					const XrHandTrackingDataSourceStateEXT &data_source = hand_trackers[i].data_source;
+					const XrPosef &pose = location.pose;
+
+					Transform3D transform;
+					Vector3 linear_velocity;
+					Vector3 angular_velocity;
+					BitField<XRHandTracker::HandJointFlags> flags;
+
+					if (location.locationFlags & XR_SPACE_LOCATION_ORIENTATION_VALID_BIT) {
+						if (pose.orientation.x != 0 || pose.orientation.y != 0 || pose.orientation.z != 0 || pose.orientation.w != 0) {
+							flags.set_flag(XRHandTracker::HAND_JOINT_FLAG_ORIENTATION_VALID);
+							transform.basis = Basis(Quaternion(pose.orientation.x, pose.orientation.y, pose.orientation.z, pose.orientation.w) * bone_adjustment);
+						}
+					}
+					if (location.locationFlags & XR_SPACE_LOCATION_POSITION_VALID_BIT) {
+						flags.set_flag(XRHandTracker::HAND_JOINT_FLAG_POSITION_VALID);
+						transform.origin = Vector3(pose.position.x, pose.position.y, pose.position.z);
+					}
+					if (location.locationFlags & XR_SPACE_LOCATION_ORIENTATION_TRACKED_BIT) {
+						flags.set_flag(XRHandTracker::HAND_JOINT_FLAG_ORIENTATION_TRACKED);
+					}
+					if (location.locationFlags & XR_SPACE_LOCATION_POSITION_TRACKED_BIT) {
+						flags.set_flag(XRHandTracker::HAND_JOINT_FLAG_POSITION_TRACKED);
+					}
+					if (location.locationFlags & XR_SPACE_VELOCITY_LINEAR_VALID_BIT) {
+						flags.set_flag(XRHandTracker::HAND_JOINT_FLAG_LINEAR_VELOCITY_VALID);
+						linear_velocity = Vector3(velocity.linearVelocity.x, velocity.linearVelocity.y, velocity.linearVelocity.z);
+						godot_tracker->set_hand_joint_linear_velocity((XRHandTracker::HandJoint)joint, linear_velocity);
+					}
+					if (location.locationFlags & XR_SPACE_VELOCITY_ANGULAR_VALID_BIT) {
+						flags.set_flag(XRHandTracker::HAND_JOINT_FLAG_ANGULAR_VELOCITY_VALID);
+						angular_velocity = Vector3(velocity.angularVelocity.x, velocity.angularVelocity.y, velocity.angularVelocity.z);
+						godot_tracker->set_hand_joint_angular_velocity((XRHandTracker::HandJoint)joint, angular_velocity);
+					}
+
+					godot_tracker->set_hand_joint_flags((XRHandTracker::HandJoint)joint, flags);
+					godot_tracker->set_hand_joint_transform((XRHandTracker::HandJoint)joint, transform);
+					godot_tracker->set_hand_joint_radius((XRHandTracker::HandJoint)joint, location.radius);
+
+					if (joint == XR_HAND_JOINT_PALM_EXT) {
+						XRHandTracker::HandTrackingSource source = XRHandTracker::HAND_TRACKING_SOURCE_UNKNOWN;
+						if (data_source.dataSource == XR_HAND_TRACKING_DATA_SOURCE_UNOBSTRUCTED_EXT) {
+							source = XRHandTracker::HAND_TRACKING_SOURCE_UNOBSTRUCTED;
+						} else if (data_source.dataSource == XR_HAND_TRACKING_DATA_SOURCE_CONTROLLER_EXT) {
+							source = XRHandTracker::HAND_TRACKING_SOURCE_CONTROLLER;
+						}
+
+						godot_tracker->set_hand_tracking_source(source);
+						if (location.locationFlags & XR_SPACE_LOCATION_POSITION_TRACKED_BIT) {
+							godot_tracker->set_pose("default", transform, linear_velocity, angular_velocity);
+						} else {
+							godot_tracker->set_has_tracking_data(false);
+							godot_tracker->invalidate_pose("default");
+						}
+					}
+				}
+			} else {
+				godot_tracker->set_has_tracking_data(false);
+				godot_tracker->invalidate_pose("default");
+			}
+		}
+	}
+}
+
+void OpenXRHandTrackingExtension::on_state_stopping() {
+	// cleanup
+	cleanup_hand_tracking();
+}
+
+void OpenXRHandTrackingExtension::cleanup_hand_tracking() {
+	XRServer *xr_server = XRServer::get_singleton();
+	ERR_FAIL_NULL(xr_server);
+
+	for (int i = 0; i < OPENXR_MAX_TRACKED_HANDS; i++) {
+		if (hand_trackers[i].hand_tracker != XR_NULL_HANDLE) {
+			xrDestroyHandTrackerEXT(hand_trackers[i].hand_tracker);
+
+			hand_trackers[i].is_initialized = false;
+			hand_trackers[i].hand_tracker = XR_NULL_HANDLE;
+
+			XRServer::get_singleton()->remove_tracker(hand_trackers[i].godot_tracker);
+		}
+	}
+}
+
+bool OpenXRHandTrackingExtension::get_active() {
+	return handTrackingSystemProperties.supportsHandTracking;
+}
+
+const OpenXRHandTrackingExtension::HandTracker *OpenXRHandTrackingExtension::get_hand_tracker(HandTrackedHands p_hand) const {
+	ERR_FAIL_UNSIGNED_INDEX_V(p_hand, OPENXR_MAX_TRACKED_HANDS, nullptr);
+
+	return &hand_trackers[p_hand];
+}
+
+XrHandJointsMotionRangeEXT OpenXRHandTrackingExtension::get_motion_range(HandTrackedHands p_hand) const {
+	ERR_FAIL_UNSIGNED_INDEX_V(p_hand, OPENXR_MAX_TRACKED_HANDS, XR_HAND_JOINTS_MOTION_RANGE_MAX_ENUM_EXT);
+
+	return hand_trackers[p_hand].motion_range;
+}
+
+OpenXRHandTrackingExtension::HandTrackedSource OpenXRHandTrackingExtension::get_hand_tracking_source(HandTrackedHands p_hand) const {
+	ERR_FAIL_UNSIGNED_INDEX_V(p_hand, OPENXR_MAX_TRACKED_HANDS, OPENXR_SOURCE_UNKNOWN);
+
+	if (hand_tracking_source_ext && hand_trackers[p_hand].data_source.isActive) {
+		switch (hand_trackers[p_hand].data_source.dataSource) {
+			case XR_HAND_TRACKING_DATA_SOURCE_UNOBSTRUCTED_EXT:
+				return OPENXR_SOURCE_UNOBSTRUCTED;
+
+			case XR_HAND_TRACKING_DATA_SOURCE_CONTROLLER_EXT:
+				return OPENXR_SOURCE_CONTROLLER;
+
+			default:
+				return OPENXR_SOURCE_UNKNOWN;
+		}
+	}
+
+	return OPENXR_SOURCE_UNKNOWN;
+}
+
+void OpenXRHandTrackingExtension::set_motion_range(HandTrackedHands p_hand, XrHandJointsMotionRangeEXT p_motion_range) {
+	ERR_FAIL_UNSIGNED_INDEX(p_hand, OPENXR_MAX_TRACKED_HANDS);
+	hand_trackers[p_hand].motion_range = p_motion_range;
+}
+
+XrSpaceLocationFlags OpenXRHandTrackingExtension::get_hand_joint_location_flags(HandTrackedHands p_hand, XrHandJointEXT p_joint) const {
+	ERR_FAIL_UNSIGNED_INDEX_V(p_hand, OPENXR_MAX_TRACKED_HANDS, XrSpaceLocationFlags(0));
+	ERR_FAIL_UNSIGNED_INDEX_V(p_joint, XR_HAND_JOINT_COUNT_EXT, XrSpaceLocationFlags(0));
+
+	if (!hand_trackers[p_hand].is_initialized) {
+		return XrSpaceLocationFlags(0);
+	}
+
+	const XrHandJointLocationEXT &location = hand_trackers[p_hand].joint_locations[p_joint];
+	return location.locationFlags;
+}
+
+Quaternion OpenXRHandTrackingExtension::get_hand_joint_rotation(HandTrackedHands p_hand, XrHandJointEXT p_joint) const {
+	ERR_FAIL_UNSIGNED_INDEX_V(p_hand, OPENXR_MAX_TRACKED_HANDS, Quaternion());
+	ERR_FAIL_UNSIGNED_INDEX_V(p_joint, XR_HAND_JOINT_COUNT_EXT, Quaternion());
+
+	if (!hand_trackers[p_hand].is_initialized) {
+		return Quaternion();
+	}
+
+	const XrHandJointLocationEXT &location = hand_trackers[p_hand].joint_locations[p_joint];
+	return Quaternion(location.pose.orientation.x, location.pose.orientation.y, location.pose.orientation.z, location.pose.orientation.w);
+}
+
+Vector3 OpenXRHandTrackingExtension::get_hand_joint_position(HandTrackedHands p_hand, XrHandJointEXT p_joint) const {
+	ERR_FAIL_UNSIGNED_INDEX_V(p_hand, OPENXR_MAX_TRACKED_HANDS, Vector3());
+	ERR_FAIL_UNSIGNED_INDEX_V(p_joint, XR_HAND_JOINT_COUNT_EXT, Vector3());
+
+	if (!hand_trackers[p_hand].is_initialized) {
+		return Vector3();
+	}
+
+	const XrHandJointLocationEXT &location = hand_trackers[p_hand].joint_locations[p_joint];
+	return Vector3(location.pose.position.x, location.pose.position.y, location.pose.position.z);
+}
+
+float OpenXRHandTrackingExtension::get_hand_joint_radius(HandTrackedHands p_hand, XrHandJointEXT p_joint) const {
+	ERR_FAIL_UNSIGNED_INDEX_V(p_hand, OPENXR_MAX_TRACKED_HANDS, 0.0);
+	ERR_FAIL_UNSIGNED_INDEX_V(p_joint, XR_HAND_JOINT_COUNT_EXT, 0.0);
+
+	if (!hand_trackers[p_hand].is_initialized) {
+		return 0.0;
+	}
+
+	return hand_trackers[p_hand].joint_locations[p_joint].radius;
+}
+
+XrSpaceVelocityFlags OpenXRHandTrackingExtension::get_hand_joint_velocity_flags(HandTrackedHands p_hand, XrHandJointEXT p_joint) const {
+	ERR_FAIL_UNSIGNED_INDEX_V(p_hand, OPENXR_MAX_TRACKED_HANDS, XrSpaceVelocityFlags(0));
+	ERR_FAIL_UNSIGNED_INDEX_V(p_joint, XR_HAND_JOINT_COUNT_EXT, XrSpaceVelocityFlags(0));
+
+	if (!hand_trackers[p_hand].is_initialized) {
+		return XrSpaceVelocityFlags(0);
+	}
+
+	const XrHandJointVelocityEXT &velocity = hand_trackers[p_hand].joint_velocities[p_joint];
+	return velocity.velocityFlags;
+}
+
+Vector3 OpenXRHandTrackingExtension::get_hand_joint_linear_velocity(HandTrackedHands p_hand, XrHandJointEXT p_joint) const {
+	ERR_FAIL_UNSIGNED_INDEX_V(p_hand, OPENXR_MAX_TRACKED_HANDS, Vector3());
+	ERR_FAIL_UNSIGNED_INDEX_V(p_joint, XR_HAND_JOINT_COUNT_EXT, Vector3());
+
+	if (!hand_trackers[p_hand].is_initialized) {
+		return Vector3();
+	}
+
+	const XrHandJointVelocityEXT &velocity = hand_trackers[p_hand].joint_velocities[p_joint];
+	return Vector3(velocity.linearVelocity.x, velocity.linearVelocity.y, velocity.linearVelocity.z);
+}
+
+Vector3 OpenXRHandTrackingExtension::get_hand_joint_angular_velocity(HandTrackedHands p_hand, XrHandJointEXT p_joint) const {
+	ERR_FAIL_UNSIGNED_INDEX_V(p_hand, OPENXR_MAX_TRACKED_HANDS, Vector3());
+	ERR_FAIL_UNSIGNED_INDEX_V(p_joint, XR_HAND_JOINT_COUNT_EXT, Vector3());
+
+	if (!hand_trackers[p_hand].is_initialized) {
+		return Vector3();
+	}
+
+	const XrHandJointVelocityEXT &velocity = hand_trackers[p_hand].joint_velocities[p_joint];
+	return Vector3(velocity.angularVelocity.x, velocity.angularVelocity.y, velocity.angularVelocity.z);
+}

engine/modules/openxr/extensions/openxr_hand_tracking_extension.h

@@ -0,0 +1,123 @@
+/**************************************************************************/
+/*  openxr_hand_tracking_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.                 */
+/**************************************************************************/
+
+#ifndef OPENXR_HAND_TRACKING_EXTENSION_H
+#define OPENXR_HAND_TRACKING_EXTENSION_H
+
+#include "../util.h"
+#include "core/math/quaternion.h"
+#include "openxr_extension_wrapper.h"
+#include "servers/xr/xr_hand_tracker.h"
+
+class OpenXRHandTrackingExtension : public OpenXRExtensionWrapper {
+public:
+	enum HandTrackedHands {
+		OPENXR_TRACKED_LEFT_HAND,
+		OPENXR_TRACKED_RIGHT_HAND,
+		OPENXR_MAX_TRACKED_HANDS
+	};
+
+	enum HandTrackedSource {
+		OPENXR_SOURCE_UNKNOWN,
+		OPENXR_SOURCE_UNOBSTRUCTED,
+		OPENXR_SOURCE_CONTROLLER,
+		OPENXR_SOURCE_MAX
+	};
+
+	struct HandTracker {
+		bool is_initialized = false;
+		Ref<XRHandTracker> godot_tracker;
+		XrHandJointsMotionRangeEXT motion_range = XR_HAND_JOINTS_MOTION_RANGE_UNOBSTRUCTED_EXT;
+		HandTrackedSource source = OPENXR_SOURCE_UNKNOWN;
+
+		XrHandTrackerEXT hand_tracker = XR_NULL_HANDLE;
+		XrHandJointLocationEXT joint_locations[XR_HAND_JOINT_COUNT_EXT];
+		XrHandJointVelocityEXT joint_velocities[XR_HAND_JOINT_COUNT_EXT];
+
+		XrHandJointVelocitiesEXT velocities;
+		XrHandJointLocationsEXT locations;
+		XrHandTrackingDataSourceStateEXT data_source;
+	};
+
+	static OpenXRHandTrackingExtension *get_singleton();
+
+	OpenXRHandTrackingExtension();
+	virtual ~OpenXRHandTrackingExtension() override;
+
+	virtual HashMap<String, bool *> get_requested_extensions() override;
+
+	virtual void on_instance_created(const XrInstance p_instance) override;
+	virtual void on_instance_destroyed() override;
+	virtual void on_session_destroyed() override;
+
+	virtual void *set_system_properties_and_get_next_pointer(void *p_next_pointer) override;
+	virtual void on_state_ready() override;
+	virtual void on_process() override;
+	virtual void on_state_stopping() override;
+
+	bool get_active();
+	const HandTracker *get_hand_tracker(HandTrackedHands p_hand) const;
+
+	XrHandJointsMotionRangeEXT get_motion_range(HandTrackedHands p_hand) const;
+	void set_motion_range(HandTrackedHands p_hand, XrHandJointsMotionRangeEXT p_motion_range);
+
+	HandTrackedSource get_hand_tracking_source(HandTrackedHands p_hand) const;
+
+	XrSpaceLocationFlags get_hand_joint_location_flags(HandTrackedHands p_hand, XrHandJointEXT p_joint) const;
+	Quaternion get_hand_joint_rotation(HandTrackedHands p_hand, XrHandJointEXT p_joint) const;
+	Vector3 get_hand_joint_position(HandTrackedHands p_hand, XrHandJointEXT p_joint) const;
+	float get_hand_joint_radius(HandTrackedHands p_hand, XrHandJointEXT p_joint) const;
+
+	XrSpaceVelocityFlags get_hand_joint_velocity_flags(HandTrackedHands p_hand, XrHandJointEXT p_joint) const;
+	Vector3 get_hand_joint_linear_velocity(HandTrackedHands p_hand, XrHandJointEXT p_joint) const;
+	Vector3 get_hand_joint_angular_velocity(HandTrackedHands p_hand, XrHandJointEXT p_joint) const;
+
+private:
+	static OpenXRHandTrackingExtension *singleton;
+
+	// state
+	XrSystemHandTrackingPropertiesEXT handTrackingSystemProperties;
+	HandTracker hand_trackers[OPENXR_MAX_TRACKED_HANDS]; // Fixed for left and right hand
+
+	// related extensions
+	bool hand_tracking_ext = false;
+	bool hand_motion_range_ext = false;
+	bool hand_tracking_source_ext = false;
+
+	// functions
+	void cleanup_hand_tracking();
+
+	// OpenXR API call wrappers
+	EXT_PROTO_XRRESULT_FUNC3(xrCreateHandTrackerEXT, (XrSession), p_session, (const XrHandTrackerCreateInfoEXT *), p_createInfo, (XrHandTrackerEXT *), p_handTracker)
+	EXT_PROTO_XRRESULT_FUNC1(xrDestroyHandTrackerEXT, (XrHandTrackerEXT), p_handTracker)
+	EXT_PROTO_XRRESULT_FUNC3(xrLocateHandJointsEXT, (XrHandTrackerEXT), p_handTracker, (const XrHandJointsLocateInfoEXT *), p_locateInfo, (XrHandJointLocationsEXT *), p_locations)
+};
+
+#endif // OPENXR_HAND_TRACKING_EXTENSION_H

engine/modules/openxr/extensions/openxr_htc_controller_extension.cpp

@@ -0,0 +1,156 @@
+/**************************************************************************/
+/*  openxr_htc_controller_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_htc_controller_extension.h"
+
+#include "../action_map/openxr_interaction_profile_metadata.h"
+
+HashMap<String, bool *> OpenXRHTCControllerExtension::get_requested_extensions() {
+	HashMap<String, bool *> request_extensions;
+
+	request_extensions[XR_HTC_VIVE_COSMOS_CONTROLLER_INTERACTION_EXTENSION_NAME] = &available[HTC_VIVE_COSMOS];
+	request_extensions[XR_HTC_VIVE_FOCUS3_CONTROLLER_INTERACTION_EXTENSION_NAME] = &available[HTC_VIVE_FOCUS3];
+	request_extensions[XR_HTC_HAND_INTERACTION_EXTENSION_NAME] = &available[HTC_HAND_INTERACTION];
+
+	return request_extensions;
+}
+
+PackedStringArray OpenXRHTCControllerExtension::get_suggested_tracker_names() {
+	PackedStringArray arr = {
+		"/user/hand_htc/left",
+		"/user/hand_htc/right",
+	};
+	return arr;
+}
+
+bool OpenXRHTCControllerExtension::is_available(HTCControllers p_type) {
+	return available[p_type];
+}
+
+void OpenXRHTCControllerExtension::on_register_metadata() {
+	OpenXRInteractionProfileMetadata *metadata = OpenXRInteractionProfileMetadata::get_singleton();
+	ERR_FAIL_NULL(metadata);
+
+	metadata->register_top_level_path("HTC left hand tracker", "/user/hand_htc/left", XR_HTC_HAND_INTERACTION_EXTENSION_NAME);
+	metadata->register_top_level_path("HTC right hand tracker", "/user/hand_htc/right", XR_HTC_HAND_INTERACTION_EXTENSION_NAME);
+
+	// HTC Vive Cosmos controller
+	metadata->register_interaction_profile("Vive Cosmos controller", "/interaction_profiles/htc/vive_cosmos_controller", XR_HTC_VIVE_COSMOS_CONTROLLER_INTERACTION_EXTENSION_NAME);
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "Grip pose", "/user/hand/left", "/user/hand/left/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "Grip pose", "/user/hand/right", "/user/hand/right/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "Aim pose", "/user/hand/left", "/user/hand/left/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "Aim pose", "/user/hand/right", "/user/hand/right/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "Palm pose", "/user/hand/left", "/user/hand/left/input/palm_ext/pose", XR_EXT_PALM_POSE_EXTENSION_NAME, OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "Palm pose", "/user/hand/right", "/user/hand/right/input/palm_ext/pose", XR_EXT_PALM_POSE_EXTENSION_NAME, OpenXRAction::OPENXR_ACTION_POSE);
+
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "Menu click", "/user/hand/left", "/user/hand/left/input/menu/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "System click", "/user/hand/right", "/user/hand/right/input/system/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "X click", "/user/hand/left", "/user/hand/left/input/x/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "Y click", "/user/hand/left", "/user/hand/left/input/y/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "A click", "/user/hand/right", "/user/hand/right/input/a/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "B click", "/user/hand/right", "/user/hand/right/input/b/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "Shoulder click", "/user/hand/left", "/user/hand/left/input/shoulder/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "Shoulder click", "/user/hand/right", "/user/hand/right/input/shoulder/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "Trigger", "/user/hand/left", "/user/hand/left/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "Trigger click", "/user/hand/left", "/user/hand/left/input/trigger/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "Trigger", "/user/hand/right", "/user/hand/right/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "Trigger click", "/user/hand/right", "/user/hand/right/input/trigger/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "Squeeze click", "/user/hand/left", "/user/hand/left/input/squeeze/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "Squeeze click", "/user/hand/right", "/user/hand/right/input/squeeze/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "Thumbstick", "/user/hand/left", "/user/hand/left/input/thumbstick", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "Thumbstick click", "/user/hand/left", "/user/hand/left/input/thumbstick/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "Thumbstick touch", "/user/hand/left", "/user/hand/left/input/thumbstick/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "Thumbstick", "/user/hand/right", "/user/hand/right/input/thumbstick", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "Thumbstick click", "/user/hand/right", "/user/hand/right/input/thumbstick/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "Thumbstick touch", "/user/hand/right", "/user/hand/right/input/thumbstick/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "Haptic output", "/user/hand/left", "/user/hand/left/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/htc/vive_cosmos_controller", "Haptic output", "/user/hand/right", "/user/hand/right/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+
+	// HTC Vive Focus 3 controller
+	metadata->register_interaction_profile("Vive Focus 3 controller", "/interaction_profiles/htc/vive_focus3_controller", XR_HTC_VIVE_FOCUS3_CONTROLLER_INTERACTION_EXTENSION_NAME);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Grip pose", "/user/hand/left", "/user/hand/left/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Grip pose", "/user/hand/right", "/user/hand/right/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Aim pose", "/user/hand/left", "/user/hand/left/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Aim pose", "/user/hand/right", "/user/hand/right/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Palm pose", "/user/hand/left", "/user/hand/left/input/palm_ext/pose", XR_EXT_PALM_POSE_EXTENSION_NAME, OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Palm pose", "/user/hand/right", "/user/hand/right/input/palm_ext/pose", XR_EXT_PALM_POSE_EXTENSION_NAME, OpenXRAction::OPENXR_ACTION_POSE);
+
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Menu click", "/user/hand/left", "/user/hand/left/input/menu/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "System click", "/user/hand/right", "/user/hand/right/input/system/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "X click", "/user/hand/left", "/user/hand/left/input/x/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Y click", "/user/hand/left", "/user/hand/left/input/y/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "A click", "/user/hand/right", "/user/hand/right/input/a/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "B click", "/user/hand/right", "/user/hand/right/input/b/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Trigger", "/user/hand/left", "/user/hand/left/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Trigger click", "/user/hand/left", "/user/hand/left/input/trigger/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Trigger touch", "/user/hand/left", "/user/hand/left/input/trigger/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Trigger", "/user/hand/right", "/user/hand/right/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Trigger click", "/user/hand/right", "/user/hand/right/input/trigger/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Trigger touch", "/user/hand/right", "/user/hand/right/input/trigger/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Squeeze click", "/user/hand/left", "/user/hand/left/input/squeeze/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Squeeze touch", "/user/hand/left", "/user/hand/left/input/squeeze/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Squeeze click", "/user/hand/right", "/user/hand/right/input/squeeze/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Squeeze touch", "/user/hand/right", "/user/hand/right/input/squeeze/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Thumbstick", "/user/hand/left", "/user/hand/left/input/thumbstick", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Thumbstick click", "/user/hand/left", "/user/hand/left/input/thumbstick/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Thumbstick touch", "/user/hand/left", "/user/hand/left/input/thumbstick/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Thumbstick", "/user/hand/right", "/user/hand/right/input/thumbstick", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Thumbstick click", "/user/hand/right", "/user/hand/right/input/thumbstick/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Thumbstick touch", "/user/hand/right", "/user/hand/right/input/thumbstick/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Thumbrest touch", "/user/hand/left", "/user/hand/left/input/thumbrest/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Thumbrest touch", "/user/hand/right", "/user/hand/right/input/thumbrest/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Haptic output", "/user/hand/left", "/user/hand/left/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/htc/vive_focus3_controller", "Haptic output", "/user/hand/right", "/user/hand/right/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+
+	// HTC Hand interaction profile
+	metadata->register_interaction_profile("HTC Hand interaction", "/interaction_profiles/htc/hand_interaction", XR_HTC_HAND_INTERACTION_EXTENSION_NAME);
+	metadata->register_io_path("/interaction_profiles/htc/hand_interaction", "Grip pose", "/user/hand_htc/left", "/user/hand_htc/left/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/hand_interaction", "Grip pose", "/user/hand_htc/right", "/user/hand_htc/right/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/hand_interaction", "Aim pose", "/user/hand_htc/left", "/user/hand_htc/left/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/hand_interaction", "Aim pose", "/user/hand_htc/right", "/user/hand_htc/right/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+
+	metadata->register_io_path("/interaction_profiles/htc/hand_interaction", "Select (pinch)", "/user/hand_htc/left", "/user/hand_htc/left/input/select/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/htc/hand_interaction", "Select (pinch)", "/user/hand_htc/right", "/user/hand_htc/right/input/select/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+
+	metadata->register_io_path("/interaction_profiles/htc/hand_interaction", "Squeeze (grab)", "/user/hand_htc/left", "/user/hand_htc/left/input/squeeze/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/htc/hand_interaction", "Squeeze (grab)", "/user/hand_htc/right", "/user/hand_htc/right/input/squeeze/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+}

engine/modules/openxr/extensions/openxr_htc_controller_extension.h

@@ -0,0 +1,58 @@
+/**************************************************************************/
+/*  openxr_htc_controller_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.                 */
+/**************************************************************************/
+
+#ifndef OPENXR_HTC_CONTROLLER_EXTENSION_H
+#define OPENXR_HTC_CONTROLLER_EXTENSION_H
+
+#include "openxr_extension_wrapper.h"
+
+class OpenXRHTCControllerExtension : public OpenXRExtensionWrapper {
+public:
+	enum HTCControllers {
+		// Note, HTC Vive Wand controllers are part of the core spec and not part of our extension.
+		HTC_VIVE_COSMOS,
+		HTC_VIVE_FOCUS3,
+		HTC_HAND_INTERACTION,
+		HTC_MAX_CONTROLLERS
+	};
+
+	virtual HashMap<String, bool *> get_requested_extensions() override;
+
+	PackedStringArray get_suggested_tracker_names() override;
+
+	bool is_available(HTCControllers p_type);
+
+	virtual void on_register_metadata() override;
+
+private:
+	bool available[HTC_MAX_CONTROLLERS] = { false, false };
+};
+
+#endif // OPENXR_HTC_CONTROLLER_EXTENSION_H

engine/modules/openxr/extensions/openxr_htc_vive_tracker_extension.cpp

@@ -0,0 +1,228 @@
+/**************************************************************************/
+/*  openxr_htc_vive_tracker_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_htc_vive_tracker_extension.h"
+
+#include "../action_map/openxr_interaction_profile_metadata.h"
+
+#include "core/string/print_string.h"
+
+HashMap<String, bool *> OpenXRHTCViveTrackerExtension::get_requested_extensions() {
+	HashMap<String, bool *> request_extensions;
+
+	request_extensions[XR_HTCX_VIVE_TRACKER_INTERACTION_EXTENSION_NAME] = &available;
+
+	return request_extensions;
+}
+
+PackedStringArray OpenXRHTCViveTrackerExtension::get_suggested_tracker_names() {
+	PackedStringArray arr = {
+		"/user/vive_tracker_htcx/role/handheld_object",
+		"/user/vive_tracker_htcx/role/left_foot",
+		"/user/vive_tracker_htcx/role/right_foot",
+		"/user/vive_tracker_htcx/role/left_shoulder",
+		"/user/vive_tracker_htcx/role/right_shoulder",
+		"/user/vive_tracker_htcx/role/left_elbow",
+		"/user/vive_tracker_htcx/role/right_elbow",
+		"/user/vive_tracker_htcx/role/left_knee",
+		"/user/vive_tracker_htcx/role/right_knee",
+		"/user/vive_tracker_htcx/role/waist",
+		"/user/vive_tracker_htcx/role/chest",
+		"/user/vive_tracker_htcx/role/camera",
+		"/user/vive_tracker_htcx/role/keyboard",
+	};
+	return arr;
+}
+
+bool OpenXRHTCViveTrackerExtension::is_available() {
+	return available;
+}
+
+void OpenXRHTCViveTrackerExtension::on_register_metadata() {
+	OpenXRInteractionProfileMetadata *metadata = OpenXRInteractionProfileMetadata::get_singleton();
+	ERR_FAIL_NULL(metadata);
+
+	// register_top_level_path("Handheld object tracker", "/user/vive_tracker_htcx/role/handheld_object", XR_HTCX_VIVE_TRACKER_INTERACTION_EXTENSION_NAME);
+	metadata->register_top_level_path("Left foot tracker", "/user/vive_tracker_htcx/role/left_foot", XR_HTCX_VIVE_TRACKER_INTERACTION_EXTENSION_NAME);
+	metadata->register_top_level_path("Right foot tracker", "/user/vive_tracker_htcx/role/right_foot", XR_HTCX_VIVE_TRACKER_INTERACTION_EXTENSION_NAME);
+	metadata->register_top_level_path("Left shoulder tracker", "/user/vive_tracker_htcx/role/left_shoulder", XR_HTCX_VIVE_TRACKER_INTERACTION_EXTENSION_NAME);
+	metadata->register_top_level_path("Right shoulder tracker", "/user/vive_tracker_htcx/role/right_shoulder", XR_HTCX_VIVE_TRACKER_INTERACTION_EXTENSION_NAME);
+	metadata->register_top_level_path("Left elbow tracker", "/user/vive_tracker_htcx/role/left_elbow", XR_HTCX_VIVE_TRACKER_INTERACTION_EXTENSION_NAME);
+	metadata->register_top_level_path("Right elbow tracker", "/user/vive_tracker_htcx/role/right_elbow", XR_HTCX_VIVE_TRACKER_INTERACTION_EXTENSION_NAME);
+	metadata->register_top_level_path("Left knee tracker", "/user/vive_tracker_htcx/role/left_knee", XR_HTCX_VIVE_TRACKER_INTERACTION_EXTENSION_NAME);
+	metadata->register_top_level_path("Right knee tracker", "/user/vive_tracker_htcx/role/right_knee", XR_HTCX_VIVE_TRACKER_INTERACTION_EXTENSION_NAME);
+	metadata->register_top_level_path("Waist tracker", "/user/vive_tracker_htcx/role/waist", XR_HTCX_VIVE_TRACKER_INTERACTION_EXTENSION_NAME);
+	metadata->register_top_level_path("Chest tracker", "/user/vive_tracker_htcx/role/chest", XR_HTCX_VIVE_TRACKER_INTERACTION_EXTENSION_NAME);
+	metadata->register_top_level_path("Camera tracker", "/user/vive_tracker_htcx/role/camera", XR_HTCX_VIVE_TRACKER_INTERACTION_EXTENSION_NAME);
+	metadata->register_top_level_path("Keyboard tracker", "/user/vive_tracker_htcx/role/keyboard", XR_HTCX_VIVE_TRACKER_INTERACTION_EXTENSION_NAME);
+
+	// HTC Vive tracker
+	// Interestingly enough trackers don't have buttons or inputs, yet these are defined in the spec.
+	// I think this can be supported through attachments on the trackers.
+	metadata->register_interaction_profile("HTC Vive tracker", "/interaction_profiles/htc/vive_tracker_htcx", XR_HTCX_VIVE_TRACKER_INTERACTION_EXTENSION_NAME);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Menu click", "/user/vive_tracker_htcx/role/left_foot", "/user/vive_tracker_htcx/role/left_foot/input/menu/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Menu click", "/user/vive_tracker_htcx/role/right_foot", "/user/vive_tracker_htcx/role/right_foot/input/menu/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Menu click", "/user/vive_tracker_htcx/role/left_shoulder", "/user/vive_tracker_htcx/role/left_shoulder/input/menu/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Menu click", "/user/vive_tracker_htcx/role/right_shoulder", "/user/vive_tracker_htcx/role/right_shoulder/input/menu/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Menu click", "/user/vive_tracker_htcx/role/left_elbow", "/user/vive_tracker_htcx/role/left_elbow/input/menu/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Menu click", "/user/vive_tracker_htcx/role/right_elbow", "/user/vive_tracker_htcx/role/right_elbow/input/menu/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Menu click", "/user/vive_tracker_htcx/role/left_knee", "/user/vive_tracker_htcx/role/left_knee/input/menu/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Menu click", "/user/vive_tracker_htcx/role/right_knee", "/user/vive_tracker_htcx/role/right_knee/input/menu/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Menu click", "/user/vive_tracker_htcx/role/waist", "/user/vive_tracker_htcx/role/waist/input/menu/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Menu click", "/user/vive_tracker_htcx/role/chest", "/user/vive_tracker_htcx/role/chest/input/menu/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Menu click", "/user/vive_tracker_htcx/role/camera", "/user/vive_tracker_htcx/role/camera/input/menu/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Menu click", "/user/vive_tracker_htcx/role/keyboard", "/user/vive_tracker_htcx/role/keyboard/input/menu/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	// metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger", "/user/vive_tracker_htcx/role/handheld_object", "/user/vive_tracker_htcx/role/handheld_object/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger", "/user/vive_tracker_htcx/role/left_foot", "/user/vive_tracker_htcx/role/left_foot/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger", "/user/vive_tracker_htcx/role/right_foot", "/user/vive_tracker_htcx/role/right_foot/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger", "/user/vive_tracker_htcx/role/left_shoulder", "/user/vive_tracker_htcx/role/left_shoulder/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger", "/user/vive_tracker_htcx/role/right_shoulder", "/user/vive_tracker_htcx/role/right_shoulder/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger", "/user/vive_tracker_htcx/role/left_elbow", "/user/vive_tracker_htcx/role/left_elbow/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger", "/user/vive_tracker_htcx/role/right_elbow", "/user/vive_tracker_htcx/role/right_elbow/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger", "/user/vive_tracker_htcx/role/left_knee", "/user/vive_tracker_htcx/role/left_knee/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger", "/user/vive_tracker_htcx/role/right_knee", "/user/vive_tracker_htcx/role/right_knee/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger", "/user/vive_tracker_htcx/role/waist", "/user/vive_tracker_htcx/role/waist/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger", "/user/vive_tracker_htcx/role/chest", "/user/vive_tracker_htcx/role/chest/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger", "/user/vive_tracker_htcx/role/camera", "/user/vive_tracker_htcx/role/camera/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger", "/user/vive_tracker_htcx/role/keyboard", "/user/vive_tracker_htcx/role/keyboard/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+
+	// metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger click", "/user/vive_tracker_htcx/role/handheld_object", "/user/vive_tracker_htcx/role/handheld_object/input/trigger/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger click", "/user/vive_tracker_htcx/role/left_foot", "/user/vive_tracker_htcx/role/left_foot/input/trigger/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger click", "/user/vive_tracker_htcx/role/right_foot", "/user/vive_tracker_htcx/role/right_foot/input/trigger/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger click", "/user/vive_tracker_htcx/role/left_shoulder", "/user/vive_tracker_htcx/role/left_shoulder/input/trigger/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger click", "/user/vive_tracker_htcx/role/right_shoulder", "/user/vive_tracker_htcx/role/right_shoulder/input/trigger/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger click", "/user/vive_tracker_htcx/role/left_elbow", "/user/vive_tracker_htcx/role/left_elbow/input/trigger/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger click", "/user/vive_tracker_htcx/role/right_elbow", "/user/vive_tracker_htcx/role/right_elbow/input/trigger/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger click", "/user/vive_tracker_htcx/role/left_knee", "/user/vive_tracker_htcx/role/left_knee/input/trigger/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger click", "/user/vive_tracker_htcx/role/right_knee", "/user/vive_tracker_htcx/role/right_knee/input/trigger/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger click", "/user/vive_tracker_htcx/role/waist", "/user/vive_tracker_htcx/role/waist/input/trigger/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger click", "/user/vive_tracker_htcx/role/chest", "/user/vive_tracker_htcx/role/chest/input/trigger/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger click", "/user/vive_tracker_htcx/role/camera", "/user/vive_tracker_htcx/role/camera/input/trigger/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trigger click", "/user/vive_tracker_htcx/role/keyboard", "/user/vive_tracker_htcx/role/keyboard/input/trigger/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	// metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Squeeze click", "/user/vive_tracker_htcx/role/handheld_object", "/user/vive_tracker_htcx/role/handheld_object/input/squeeze/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Squeeze click", "/user/vive_tracker_htcx/role/left_foot", "/user/vive_tracker_htcx/role/left_foot/input/squeeze/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Squeeze click", "/user/vive_tracker_htcx/role/right_foot", "/user/vive_tracker_htcx/role/right_foot/input/squeeze/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Squeeze click", "/user/vive_tracker_htcx/role/left_shoulder", "/user/vive_tracker_htcx/role/left_shoulder/input/squeeze/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Squeeze click", "/user/vive_tracker_htcx/role/right_shoulder", "/user/vive_tracker_htcx/role/right_shoulder/input/squeeze/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Squeeze click", "/user/vive_tracker_htcx/role/left_elbow", "/user/vive_tracker_htcx/role/left_elbow/input/squeeze/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Squeeze click", "/user/vive_tracker_htcx/role/right_elbow", "/user/vive_tracker_htcx/role/right_elbow/input/squeeze/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Squeeze click", "/user/vive_tracker_htcx/role/left_knee", "/user/vive_tracker_htcx/role/left_knee/input/squeeze/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Squeeze click", "/user/vive_tracker_htcx/role/right_knee", "/user/vive_tracker_htcx/role/right_knee/input/squeeze/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Squeeze click", "/user/vive_tracker_htcx/role/waist", "/user/vive_tracker_htcx/role/waist/input/squeeze/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Squeeze click", "/user/vive_tracker_htcx/role/chest", "/user/vive_tracker_htcx/role/chest/input/squeeze/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Squeeze click", "/user/vive_tracker_htcx/role/camera", "/user/vive_tracker_htcx/role/camera/input/squeeze/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Squeeze click", "/user/vive_tracker_htcx/role/keyboard", "/user/vive_tracker_htcx/role/keyboard/input/squeeze/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	// metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad", "/user/vive_tracker_htcx/role/handheld_object", "/user/vive_tracker_htcx/role/handheld_object/input/trackpad", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad", "/user/vive_tracker_htcx/role/left_foot", "/user/vive_tracker_htcx/role/left_foot/input/trackpad", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad", "/user/vive_tracker_htcx/role/right_foot", "/user/vive_tracker_htcx/role/right_foot/input/trackpad", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad", "/user/vive_tracker_htcx/role/left_shoulder", "/user/vive_tracker_htcx/role/left_shoulder/input/trackpad", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad", "/user/vive_tracker_htcx/role/right_shoulder", "/user/vive_tracker_htcx/role/right_shoulder/input/trackpad", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad", "/user/vive_tracker_htcx/role/left_elbow", "/user/vive_tracker_htcx/role/left_elbow/input/trackpad", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad", "/user/vive_tracker_htcx/role/right_elbow", "/user/vive_tracker_htcx/role/right_elbow/input/trackpad", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad", "/user/vive_tracker_htcx/role/left_knee", "/user/vive_tracker_htcx/role/left_knee/input/trackpad", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad", "/user/vive_tracker_htcx/role/right_knee", "/user/vive_tracker_htcx/role/right_knee/input/trackpad", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad", "/user/vive_tracker_htcx/role/waist", "/user/vive_tracker_htcx/role/waist/input/trackpad", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad", "/user/vive_tracker_htcx/role/chest", "/user/vive_tracker_htcx/role/chest/input/trackpad", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad", "/user/vive_tracker_htcx/role/camera", "/user/vive_tracker_htcx/role/camera/input/trackpad", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad", "/user/vive_tracker_htcx/role/keyboard", "/user/vive_tracker_htcx/role/keyboard/input/trackpad", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+
+	// metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad click", "/user/vive_tracker_htcx/role/handheld_object", "/user/vive_tracker_htcx/role/handheld_object/input/trackpad/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad click", "/user/vive_tracker_htcx/role/left_foot", "/user/vive_tracker_htcx/role/left_foot/input/trackpad/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad click", "/user/vive_tracker_htcx/role/right_foot", "/user/vive_tracker_htcx/role/right_foot/input/trackpad/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad click", "/user/vive_tracker_htcx/role/left_shoulder", "/user/vive_tracker_htcx/role/left_shoulder/input/trackpad/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad click", "/user/vive_tracker_htcx/role/right_shoulder", "/user/vive_tracker_htcx/role/right_shoulder/input/trackpad/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad click", "/user/vive_tracker_htcx/role/left_elbow", "/user/vive_tracker_htcx/role/left_elbow/input/trackpad/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad click", "/user/vive_tracker_htcx/role/right_elbow", "/user/vive_tracker_htcx/role/right_elbow/input/trackpad/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad click", "/user/vive_tracker_htcx/role/left_knee", "/user/vive_tracker_htcx/role/left_knee/input/trackpad/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad click", "/user/vive_tracker_htcx/role/right_knee", "/user/vive_tracker_htcx/role/right_knee/input/trackpad/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad click", "/user/vive_tracker_htcx/role/waist", "/user/vive_tracker_htcx/role/waist/input/trackpad/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad click", "/user/vive_tracker_htcx/role/chest", "/user/vive_tracker_htcx/role/chest/input/trackpad/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad click", "/user/vive_tracker_htcx/role/camera", "/user/vive_tracker_htcx/role/camera/input/trackpad/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad click", "/user/vive_tracker_htcx/role/keyboard", "/user/vive_tracker_htcx/role/keyboard/input/trackpad/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	// metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad touch", "/user/vive_tracker_htcx/role/handheld_object", "/user/vive_tracker_htcx/role/handheld_object/input/trackpad/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad touch", "/user/vive_tracker_htcx/role/left_foot", "/user/vive_tracker_htcx/role/left_foot/input/trackpad/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad touch", "/user/vive_tracker_htcx/role/right_foot", "/user/vive_tracker_htcx/role/right_foot/input/trackpad/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad touch", "/user/vive_tracker_htcx/role/left_shoulder", "/user/vive_tracker_htcx/role/left_shoulder/input/trackpad/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad touch", "/user/vive_tracker_htcx/role/right_shoulder", "/user/vive_tracker_htcx/role/right_shoulder/input/trackpad/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad touch", "/user/vive_tracker_htcx/role/left_elbow", "/user/vive_tracker_htcx/role/left_elbow/input/trackpad/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad touch", "/user/vive_tracker_htcx/role/right_elbow", "/user/vive_tracker_htcx/role/right_elbow/input/trackpad/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad touch", "/user/vive_tracker_htcx/role/left_knee", "/user/vive_tracker_htcx/role/left_knee/input/trackpad/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad touch", "/user/vive_tracker_htcx/role/right_knee", "/user/vive_tracker_htcx/role/right_knee/input/trackpad/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad touch", "/user/vive_tracker_htcx/role/waist", "/user/vive_tracker_htcx/role/waist/input/trackpad/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad touch", "/user/vive_tracker_htcx/role/chest", "/user/vive_tracker_htcx/role/chest/input/trackpad/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad touch", "/user/vive_tracker_htcx/role/camera", "/user/vive_tracker_htcx/role/camera/input/trackpad/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Trackpad touch", "/user/vive_tracker_htcx/role/keyboard", "/user/vive_tracker_htcx/role/keyboard/input/trackpad/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	// register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Grip pose", "/user/vive_tracker_htcx/role/handheld_object", "/user/vive_tracker_htcx/role/handheld_object/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Grip pose", "/user/vive_tracker_htcx/role/left_foot", "/user/vive_tracker_htcx/role/left_foot/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Grip pose", "/user/vive_tracker_htcx/role/right_foot", "/user/vive_tracker_htcx/role/right_foot/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Grip pose", "/user/vive_tracker_htcx/role/left_shoulder", "/user/vive_tracker_htcx/role/left_shoulder/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Grip pose", "/user/vive_tracker_htcx/role/right_shoulder", "/user/vive_tracker_htcx/role/right_shoulder/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Grip pose", "/user/vive_tracker_htcx/role/left_elbow", "/user/vive_tracker_htcx/role/left_elbow/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Grip pose", "/user/vive_tracker_htcx/role/right_elbow", "/user/vive_tracker_htcx/role/right_elbow/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Grip pose", "/user/vive_tracker_htcx/role/left_knee", "/user/vive_tracker_htcx/role/left_knee/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Grip pose", "/user/vive_tracker_htcx/role/right_knee", "/user/vive_tracker_htcx/role/right_knee/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Grip pose", "/user/vive_tracker_htcx/role/waist", "/user/vive_tracker_htcx/role/waist/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Grip pose", "/user/vive_tracker_htcx/role/chest", "/user/vive_tracker_htcx/role/chest/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Grip pose", "/user/vive_tracker_htcx/role/camera", "/user/vive_tracker_htcx/role/camera/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Grip pose", "/user/vive_tracker_htcx/role/keyboard", "/user/vive_tracker_htcx/role/keyboard/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+
+	// metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Haptic output", "/user/vive_tracker_htcx/role/handheld_object", "/user/vive_tracker_htcx/role/handheld_object/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Haptic output", "/user/vive_tracker_htcx/role/left_foot", "/user/vive_tracker_htcx/role/left_foot/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Haptic output", "/user/vive_tracker_htcx/role/right_foot", "/user/vive_tracker_htcx/role/right_foot/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Haptic output", "/user/vive_tracker_htcx/role/left_shoulder", "/user/vive_tracker_htcx/role/left_shoulder/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Haptic output", "/user/vive_tracker_htcx/role/right_shoulder", "/user/vive_tracker_htcx/role/right_shoulder/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Haptic output", "/user/vive_tracker_htcx/role/left_elbow", "/user/vive_tracker_htcx/role/left_elbow/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Haptic output", "/user/vive_tracker_htcx/role/right_elbow", "/user/vive_tracker_htcx/role/right_elbow/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Haptic output", "/user/vive_tracker_htcx/role/left_knee", "/user/vive_tracker_htcx/role/left_knee/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Haptic output", "/user/vive_tracker_htcx/role/right_knee", "/user/vive_tracker_htcx/role/right_knee/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Haptic output", "/user/vive_tracker_htcx/role/waist", "/user/vive_tracker_htcx/role/waist/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Haptic output", "/user/vive_tracker_htcx/role/chest", "/user/vive_tracker_htcx/role/chest/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Haptic output", "/user/vive_tracker_htcx/role/camera", "/user/vive_tracker_htcx/role/camera/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/htc/vive_tracker_htcx", "Haptic output", "/user/vive_tracker_htcx/role/keyboard", "/user/vive_tracker_htcx/role/keyboard/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+}
+
+bool OpenXRHTCViveTrackerExtension::on_event_polled(const XrEventDataBuffer &event) {
+	switch (event.type) {
+		case XR_TYPE_EVENT_DATA_VIVE_TRACKER_CONNECTED_HTCX: {
+			// Investigate if we need to do more here
+			print_verbose("OpenXR EVENT: VIVE tracker connected");
+
+			return true;
+		} break;
+		default: {
+			return false;
+		} break;
+	}
+}

engine/modules/openxr/extensions/openxr_htc_vive_tracker_extension.h

@@ -0,0 +1,51 @@
+/**************************************************************************/
+/*  openxr_htc_vive_tracker_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.                 */
+/**************************************************************************/
+
+#ifndef OPENXR_HTC_VIVE_TRACKER_EXTENSION_H
+#define OPENXR_HTC_VIVE_TRACKER_EXTENSION_H
+
+#include "openxr_extension_wrapper.h"
+
+class OpenXRHTCViveTrackerExtension : public OpenXRExtensionWrapper {
+public:
+	virtual HashMap<String, bool *> get_requested_extensions() override;
+
+	PackedStringArray get_suggested_tracker_names() override;
+
+	bool is_available();
+
+	virtual void on_register_metadata() override;
+	virtual bool on_event_polled(const XrEventDataBuffer &event) override;
+
+private:
+	bool available = false;
+};
+
+#endif // OPENXR_HTC_VIVE_TRACKER_EXTENSION_H

engine/modules/openxr/extensions/openxr_huawei_controller_extension.cpp

@@ -0,0 +1,84 @@
+/**************************************************************************/
+/*  openxr_huawei_controller_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_huawei_controller_extension.h"
+
+#include "../action_map/openxr_interaction_profile_metadata.h"
+
+HashMap<String, bool *> OpenXRHuaweiControllerExtension::get_requested_extensions() {
+	HashMap<String, bool *> request_extensions;
+
+	request_extensions[XR_HUAWEI_CONTROLLER_INTERACTION_EXTENSION_NAME] = &available;
+
+	return request_extensions;
+}
+
+bool OpenXRHuaweiControllerExtension::is_available() {
+	return available;
+}
+
+void OpenXRHuaweiControllerExtension::on_register_metadata() {
+	OpenXRInteractionProfileMetadata *metadata = OpenXRInteractionProfileMetadata::get_singleton();
+	ERR_FAIL_NULL(metadata);
+
+	// Huawei controller
+	metadata->register_interaction_profile("Huawei controller", "/interaction_profiles/huawei/controller", XR_HUAWEI_CONTROLLER_INTERACTION_EXTENSION_NAME);
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Grip pose", "/user/hand/left", "/user/hand/left/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Grip pose", "/user/hand/right", "/user/hand/right/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Aim pose", "/user/hand/left", "/user/hand/left/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Aim pose", "/user/hand/right", "/user/hand/right/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Palm pose", "/user/hand/left", "/user/hand/left/input/palm_ext/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Palm pose", "/user/hand/right", "/user/hand/right/input/palm_ext/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Home click", "/user/hand/left", "/user/hand/left/input/home/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Home click", "/user/hand/right", "/user/hand/right/input/home/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Back click", "/user/hand/left", "/user/hand/left/input/back/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Back click", "/user/hand/right", "/user/hand/right/input/back/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Volume up click", "/user/hand/left", "/user/hand/left/input/volume_up/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Volume up click", "/user/hand/right", "/user/hand/right/input/volume_up/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Volume down click", "/user/hand/left", "/user/hand/left/input/volume_down/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Volume down click", "/user/hand/right", "/user/hand/right/input/volume_down/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Trigger", "/user/hand/left", "/user/hand/left/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Trigger click", "/user/hand/left", "/user/hand/left/input/trigger/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Trigger", "/user/hand/right", "/user/hand/right/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Trigger click", "/user/hand/right", "/user/hand/right/input/trigger/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Trackpad", "/user/hand/left", "/user/hand/left/input/trackpad", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Trackpad click", "/user/hand/left", "/user/hand/left/input/trackpad/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Trackpad touch", "/user/hand/left", "/user/hand/left/input/trackpad/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Trackpad", "/user/hand/right", "/user/hand/right/input/trackpad", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Trackpad click", "/user/hand/right", "/user/hand/right/input/trackpad/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Trackpad touch", "/user/hand/right", "/user/hand/right/input/trackpad/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Haptic output", "/user/hand/left", "/user/hand/left/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/huawei/controller", "Haptic output", "/user/hand/right", "/user/hand/right/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+}

engine/modules/openxr/extensions/openxr_huawei_controller_extension.h

@@ -0,0 +1,48 @@
+/**************************************************************************/
+/*  openxr_huawei_controller_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.                 */
+/**************************************************************************/
+
+#ifndef OPENXR_HUAWEI_CONTROLLER_EXTENSION_H
+#define OPENXR_HUAWEI_CONTROLLER_EXTENSION_H
+
+#include "openxr_extension_wrapper.h"
+
+class OpenXRHuaweiControllerExtension : public OpenXRExtensionWrapper {
+public:
+	virtual HashMap<String, bool *> get_requested_extensions() override;
+
+	bool is_available();
+
+	virtual void on_register_metadata() override;
+
+private:
+	bool available = false;
+};
+
+#endif // OPENXR_HUAWEI_CONTROLLER_EXTENSION_H

engine/modules/openxr/extensions/openxr_local_floor_extension.cpp

@@ -0,0 +1,59 @@
+/**************************************************************************/
+/*  openxr_local_floor_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_local_floor_extension.h"
+
+#include "core/string/print_string.h"
+
+OpenXRLocalFloorExtension *OpenXRLocalFloorExtension::singleton = nullptr;
+
+OpenXRLocalFloorExtension *OpenXRLocalFloorExtension::get_singleton() {
+	return singleton;
+}
+
+OpenXRLocalFloorExtension::OpenXRLocalFloorExtension() {
+	singleton = this;
+}
+
+OpenXRLocalFloorExtension::~OpenXRLocalFloorExtension() {
+	singleton = nullptr;
+}
+
+HashMap<String, bool *> OpenXRLocalFloorExtension::get_requested_extensions() {
+	HashMap<String, bool *> request_extensions;
+
+	request_extensions[XR_EXT_LOCAL_FLOOR_EXTENSION_NAME] = &available;
+
+	return request_extensions;
+}
+
+bool OpenXRLocalFloorExtension::is_available() {
+	return available;
+}

engine/modules/openxr/extensions/openxr_local_floor_extension.h

@@ -0,0 +1,53 @@
+/**************************************************************************/
+/*  openxr_local_floor_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.                 */
+/**************************************************************************/
+
+#ifndef OPENXR_LOCAL_FLOOR_EXTENSION_H
+#define OPENXR_LOCAL_FLOOR_EXTENSION_H
+
+#include "openxr_extension_wrapper.h"
+
+class OpenXRLocalFloorExtension : public OpenXRExtensionWrapper {
+public:
+	static OpenXRLocalFloorExtension *get_singleton();
+
+	OpenXRLocalFloorExtension();
+	virtual ~OpenXRLocalFloorExtension() override;
+
+	virtual HashMap<String, bool *> get_requested_extensions() override;
+
+	bool is_available();
+
+private:
+	static OpenXRLocalFloorExtension *singleton;
+
+	bool available = false;
+};
+
+#endif // OPENXR_LOCAL_FLOOR_EXTENSION_H

engine/modules/openxr/extensions/openxr_meta_controller_extension.cpp

@@ -0,0 +1,184 @@
+/**************************************************************************/
+/*  openxr_meta_controller_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_meta_controller_extension.h"
+
+#include "../action_map/openxr_interaction_profile_metadata.h"
+
+HashMap<String, bool *> OpenXRMetaControllerExtension::get_requested_extensions() {
+	HashMap<String, bool *> request_extensions;
+
+	request_extensions[XR_FB_TOUCH_CONTROLLER_PROXIMITY_EXTENSION_NAME] = &available[META_TOUCH_PROXIMITY];
+	request_extensions[XR_FB_TOUCH_CONTROLLER_PRO_EXTENSION_NAME] = &available[META_TOUCH_PRO];
+	request_extensions[XR_META_TOUCH_CONTROLLER_PLUS_EXTENSION_NAME] = &available[META_TOUCH_PLUS];
+
+	return request_extensions;
+}
+
+bool OpenXRMetaControllerExtension::is_available(MetaControllers p_type) {
+	return available[p_type];
+}
+
+void OpenXRMetaControllerExtension::on_register_metadata() {
+	OpenXRInteractionProfileMetadata *metadata = OpenXRInteractionProfileMetadata::get_singleton();
+	ERR_FAIL_NULL(metadata);
+
+	// Note, we register controllers regardless if they are supported on the current hardware.
+
+	// Normal touch controller is part of the core spec, but we do have some extensions.
+	metadata->register_io_path("/interaction_profiles/oculus/touch_controller", "Trigger proximity", "/user/hand/left", "/user/hand/left/input/trigger/proximity_fb ", "XR_FB_touch_controller_proximity", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/oculus/touch_controller", "Trigger proximity", "/user/hand/right", "/user/hand/right/input/trigger/proximity_fb ", "XR_FB_touch_controller_proximity", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/oculus/touch_controller", "Thumb proximity", "/user/hand/left", "/user/hand/left/input/thumb_fb/proximity_fb ", "XR_FB_touch_controller_proximity", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/oculus/touch_controller", "Thumb proximity", "/user/hand/right", "/user/hand/right/input/thumb_fb/proximity_fb ", "XR_FB_touch_controller_proximity", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	// Touch controller pro (Quest Pro)
+	metadata->register_interaction_profile("Touch controller pro", "/interaction_profiles/facebook/touch_controller_pro", "XR_FB_touch_controller_pro");
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Grip pose", "/user/hand/left", "/user/hand/left/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Grip pose", "/user/hand/right", "/user/hand/right/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Aim pose", "/user/hand/left", "/user/hand/left/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Aim pose", "/user/hand/right", "/user/hand/right/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Palm pose", "/user/hand/left", "/user/hand/left/input/palm_ext/pose", XR_EXT_PALM_POSE_EXTENSION_NAME, OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Palm pose", "/user/hand/right", "/user/hand/right/input/palm_ext/pose", XR_EXT_PALM_POSE_EXTENSION_NAME, OpenXRAction::OPENXR_ACTION_POSE);
+
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Menu click", "/user/hand/left", "/user/hand/left/input/menu/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "System click", "/user/hand/right", "/user/hand/right/input/system/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "X click", "/user/hand/left", "/user/hand/left/input/x/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "X touch", "/user/hand/left", "/user/hand/left/input/x/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Y click", "/user/hand/left", "/user/hand/left/input/y/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Y touch", "/user/hand/left", "/user/hand/left/input/y/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "A click", "/user/hand/right", "/user/hand/right/input/a/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "A touch", "/user/hand/right", "/user/hand/right/input/a/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "B click", "/user/hand/right", "/user/hand/right/input/b/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "B touch", "/user/hand/right", "/user/hand/right/input/b/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Trigger", "/user/hand/left", "/user/hand/left/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Trigger touch", "/user/hand/left", "/user/hand/left/input/trigger/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Trigger proximity", "/user/hand/left", "/user/hand/left/input/trigger/proximity_fb", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Trigger curl", "/user/hand/left", "/user/hand/left/input/trigger/curl_fb", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Trigger slide", "/user/hand/left", "/user/hand/left/input/trigger/slide_fb", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Trigger force", "/user/hand/left", "/user/hand/left/input/trigger/force", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Trigger", "/user/hand/right", "/user/hand/right/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Trigger touch", "/user/hand/right", "/user/hand/right/input/trigger/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Trigger proximity", "/user/hand/right", "/user/hand/right/input/trigger/proximity_fb", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Trigger curl", "/user/hand/right", "/user/hand/right/input/trigger/curl_fb", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Trigger slide", "/user/hand/right", "/user/hand/right/input/trigger/slide_fb", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Trigger force", "/user/hand/right", "/user/hand/right/input/trigger/force", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Squeeze", "/user/hand/left", "/user/hand/left/input/squeeze/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Squeeze", "/user/hand/right", "/user/hand/right/input/squeeze/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Thumb proximity", "/user/hand/left", "/user/hand/left/input/thumb_fb/proximity_fb", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Thumb proximity", "/user/hand/right", "/user/hand/right/input/thumb_fb/proximity_fb", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Thumbstick", "/user/hand/left", "/user/hand/left/input/thumbstick", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Thumbstick X", "/user/hand/left", "/user/hand/left/input/thumbstick/x", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Thumbstick Y", "/user/hand/left", "/user/hand/left/input/thumbstick/y", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Thumbstick click", "/user/hand/left", "/user/hand/left/input/thumbstick/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Thumbstick touch", "/user/hand/left", "/user/hand/left/input/thumbstick/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Thumbstick", "/user/hand/right", "/user/hand/right/input/thumbstick", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Thumbstick X", "/user/hand/right", "/user/hand/right/input/thumbstick/x", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Thumbstick Y", "/user/hand/right", "/user/hand/right/input/thumbstick/y", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Thumbstick click", "/user/hand/right", "/user/hand/right/input/thumbstick/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Thumbstick touch", "/user/hand/right", "/user/hand/right/input/thumbstick/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Thumbrest touch", "/user/hand/left", "/user/hand/left/input/thumbrest/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Thumbrest force", "/user/hand/left", "/user/hand/left/input/thumbrest/force", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Thumbrest touch", "/user/hand/right", "/user/hand/right/input/thumbrest/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Thumbrest force", "/user/hand/right", "/user/hand/right/input/thumbrest/force", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Stylus force", "/user/hand/left", "/user/hand/left/input/stylus_fb/force", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Stylus force", "/user/hand/right", "/user/hand/right/input/stylus_fb/force", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Haptic output", "/user/hand/left", "/user/hand/left/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Haptic trigger output", "/user/hand/left", "/user/hand/left/output/haptic_trigger_fb", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Haptic thumb output", "/user/hand/left", "/user/hand/left/output/haptic_thumb_fb", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Haptic output", "/user/hand/right", "/user/hand/right/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Haptic trigger output", "/user/hand/right", "/user/hand/right/output/haptic_trigger_fb", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/facebook/touch_controller_pro", "Haptic thumb output", "/user/hand/right", "/user/hand/right/output/haptic_thumb_fb", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+
+	// Touch controller plus (Quest 3)
+	metadata->register_interaction_profile("Touch controller plus", "/interaction_profiles/meta/touch_controller_plus", "XR_META_touch_controller_plus");
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Grip pose", "/user/hand/left", "/user/hand/left/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Grip pose", "/user/hand/right", "/user/hand/right/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Aim pose", "/user/hand/left", "/user/hand/left/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Aim pose", "/user/hand/right", "/user/hand/right/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Palm pose", "/user/hand/left", "/user/hand/left/input/palm_ext/pose", XR_EXT_PALM_POSE_EXTENSION_NAME, OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Palm pose", "/user/hand/right", "/user/hand/right/input/palm_ext/pose", XR_EXT_PALM_POSE_EXTENSION_NAME, OpenXRAction::OPENXR_ACTION_POSE);
+
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Menu click", "/user/hand/left", "/user/hand/left/input/menu/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "System click", "/user/hand/right", "/user/hand/right/input/system/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "X click", "/user/hand/left", "/user/hand/left/input/x/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "X touch", "/user/hand/left", "/user/hand/left/input/x/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Y click", "/user/hand/left", "/user/hand/left/input/y/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Y touch", "/user/hand/left", "/user/hand/left/input/y/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "A click", "/user/hand/right", "/user/hand/right/input/a/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "A touch", "/user/hand/right", "/user/hand/right/input/a/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "B click", "/user/hand/right", "/user/hand/right/input/b/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "B touch", "/user/hand/right", "/user/hand/right/input/b/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Trigger", "/user/hand/left", "/user/hand/left/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Trigger touch", "/user/hand/left", "/user/hand/left/input/trigger/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Trigger proximity", "/user/hand/left", "/user/hand/left/input/trigger/proximity_meta", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Trigger curl", "/user/hand/left", "/user/hand/left/input/trigger/curl_meta", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Trigger slide", "/user/hand/left", "/user/hand/left/input/trigger/slide_meta", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Trigger force", "/user/hand/left", "/user/hand/left/input/trigger/force", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Trigger", "/user/hand/right", "/user/hand/right/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Trigger touch", "/user/hand/right", "/user/hand/right/input/trigger/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Trigger proximity", "/user/hand/right", "/user/hand/right/input/trigger/proximity_meta", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Trigger curl", "/user/hand/right", "/user/hand/right/input/trigger/curl_meta", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Trigger slide", "/user/hand/right", "/user/hand/right/input/trigger/slide_meta", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Trigger force", "/user/hand/right", "/user/hand/right/input/trigger/force", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Squeeze", "/user/hand/left", "/user/hand/left/input/squeeze/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Squeeze", "/user/hand/right", "/user/hand/right/input/squeeze/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Thumb proximity", "/user/hand/left", "/user/hand/left/input/thumb_meta/proximity_meta", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Thumb proximity", "/user/hand/right", "/user/hand/right/input/thumb_meta/proximity_meta", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Thumbstick", "/user/hand/left", "/user/hand/left/input/thumbstick", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Thumbstick X", "/user/hand/left", "/user/hand/left/input/thumbstick/x", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Thumbstick Y", "/user/hand/left", "/user/hand/left/input/thumbstick/y", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Thumbstick click", "/user/hand/left", "/user/hand/left/input/thumbstick/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Thumbstick touch", "/user/hand/left", "/user/hand/left/input/thumbstick/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Thumbstick", "/user/hand/right", "/user/hand/right/input/thumbstick", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Thumbstick X", "/user/hand/right", "/user/hand/right/input/thumbstick/x", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Thumbstick Y", "/user/hand/right", "/user/hand/right/input/thumbstick/y", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Thumbstick click", "/user/hand/right", "/user/hand/right/input/thumbstick/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Thumbstick touch", "/user/hand/right", "/user/hand/right/input/thumbstick/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Thumbrest touch", "/user/hand/left", "/user/hand/left/input/thumbrest/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Thumbrest touch", "/user/hand/right", "/user/hand/right/input/thumbrest/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Haptic output", "/user/hand/left", "/user/hand/left/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/meta/touch_controller_plus", "Haptic output", "/user/hand/right", "/user/hand/right/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+}

engine/modules/openxr/extensions/openxr_meta_controller_extension.h

@@ -0,0 +1,55 @@
+/**************************************************************************/
+/*  openxr_meta_controller_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.                 */
+/**************************************************************************/
+
+#ifndef OPENXR_META_CONTROLLER_EXTENSION_H
+#define OPENXR_META_CONTROLLER_EXTENSION_H
+
+#include "openxr_extension_wrapper.h"
+
+class OpenXRMetaControllerExtension : public OpenXRExtensionWrapper {
+public:
+	enum MetaControllers {
+		META_TOUCH_PROXIMITY, // Proximity extensions for normal touch controllers
+		META_TOUCH_PRO, // Touch controller for the Quest Pro
+		META_TOUCH_PLUS, // Touch controller for the Quest Plus
+		META_MAX_CONTROLLERS
+	};
+
+	virtual HashMap<String, bool *> get_requested_extensions() override;
+
+	bool is_available(MetaControllers p_type);
+
+	virtual void on_register_metadata() override;
+
+private:
+	bool available[META_MAX_CONTROLLERS] = { false, false, false };
+};
+
+#endif // OPENXR_META_CONTROLLER_EXTENSION_H

engine/modules/openxr/extensions/openxr_ml2_controller_extension.cpp

@@ -0,0 +1,72 @@
+/**************************************************************************/
+/*  openxr_ml2_controller_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_ml2_controller_extension.h"
+
+#include "../action_map/openxr_interaction_profile_metadata.h"
+
+HashMap<String, bool *> OpenXRML2ControllerExtension::get_requested_extensions() {
+	HashMap<String, bool *> request_extensions;
+
+	request_extensions[XR_ML_ML2_CONTROLLER_INTERACTION_EXTENSION_NAME] = &available;
+
+	return request_extensions;
+}
+
+bool OpenXRML2ControllerExtension::is_available() {
+	return available;
+}
+
+void OpenXRML2ControllerExtension::on_register_metadata() {
+	OpenXRInteractionProfileMetadata *metadata = OpenXRInteractionProfileMetadata::get_singleton();
+	ERR_FAIL_NULL(metadata);
+
+	// Magic Leap 2 Controller
+	const String profile_path = "/interaction_profiles/ml/ml2_controller";
+	metadata->register_interaction_profile("Magic Leap 2 controller", "/interaction_profiles/ml/ml2_controller", XR_ML_ML2_CONTROLLER_INTERACTION_EXTENSION_NAME);
+	for (const String user_path : { "/user/hand/left", "/user/hand/right" }) {
+		metadata->register_io_path(profile_path, "Grip pose", user_path, user_path + "/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+		metadata->register_io_path(profile_path, "Aim pose", user_path, user_path + "/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+
+		metadata->register_io_path(profile_path, "Menu click", user_path, user_path + "/input/menu/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+		metadata->register_io_path(profile_path, "Trigger", user_path, user_path + "/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+		metadata->register_io_path(profile_path, "Trigger click", user_path, user_path + "/input/trigger/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+		metadata->register_io_path(profile_path, "Shoulder click", user_path, user_path + "/input/shoulder/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+		metadata->register_io_path(profile_path, "Trackpad click", user_path, user_path + "/input/trackpad/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+		metadata->register_io_path(profile_path, "Trackpad force", user_path, user_path + "/input/trackpad/force", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+		metadata->register_io_path(profile_path, "Trackpad X", user_path, user_path + "/input/trackpad/x", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+		metadata->register_io_path(profile_path, "Trackpad Y", user_path, user_path + "/input/trackpad/y", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+		metadata->register_io_path(profile_path, "Trackpad touch", user_path, user_path + "/input/trackpad/touch", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+
+		metadata->register_io_path(profile_path, "Haptic output", user_path, user_path + "/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	}
+}

engine/modules/openxr/extensions/openxr_ml2_controller_extension.h

@@ -0,0 +1,48 @@
+/**************************************************************************/
+/*  openxr_ml2_controller_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.                 */
+/**************************************************************************/
+
+#ifndef OPENXR_ML2_CONTROLLER_EXTENSION_H
+#define OPENXR_ML2_CONTROLLER_EXTENSION_H
+
+#include "openxr_extension_wrapper.h"
+
+class OpenXRML2ControllerExtension : public OpenXRExtensionWrapper {
+public:
+	virtual HashMap<String, bool *> get_requested_extensions() override;
+
+	bool is_available();
+
+	virtual void on_register_metadata() override;
+
+private:
+	bool available = false;
+};
+
+#endif // OPENXR_ML2_CONTROLLER_EXTENSION_H

engine/modules/openxr/extensions/openxr_palm_pose_extension.cpp

@@ -0,0 +1,59 @@
+/**************************************************************************/
+/*  openxr_palm_pose_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_palm_pose_extension.h"
+
+#include "core/string/print_string.h"
+
+OpenXRPalmPoseExtension *OpenXRPalmPoseExtension::singleton = nullptr;
+
+OpenXRPalmPoseExtension *OpenXRPalmPoseExtension::get_singleton() {
+	return singleton;
+}
+
+OpenXRPalmPoseExtension::OpenXRPalmPoseExtension() {
+	singleton = this;
+}
+
+OpenXRPalmPoseExtension::~OpenXRPalmPoseExtension() {
+	singleton = nullptr;
+}
+
+HashMap<String, bool *> OpenXRPalmPoseExtension::get_requested_extensions() {
+	HashMap<String, bool *> request_extensions;
+
+	request_extensions[XR_EXT_PALM_POSE_EXTENSION_NAME] = &available;
+
+	return request_extensions;
+}
+
+bool OpenXRPalmPoseExtension::is_available() {
+	return available;
+}

engine/modules/openxr/extensions/openxr_palm_pose_extension.h

@@ -0,0 +1,53 @@
+/**************************************************************************/
+/*  openxr_palm_pose_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.                 */
+/**************************************************************************/
+
+#ifndef OPENXR_PALM_POSE_EXTENSION_H
+#define OPENXR_PALM_POSE_EXTENSION_H
+
+#include "openxr_extension_wrapper.h"
+
+class OpenXRPalmPoseExtension : public OpenXRExtensionWrapper {
+public:
+	static OpenXRPalmPoseExtension *get_singleton();
+
+	OpenXRPalmPoseExtension();
+	virtual ~OpenXRPalmPoseExtension() override;
+
+	virtual HashMap<String, bool *> get_requested_extensions() override;
+
+	bool is_available();
+
+private:
+	static OpenXRPalmPoseExtension *singleton;
+
+	bool available = false;
+};
+
+#endif // OPENXR_PALM_POSE_EXTENSION_H

engine/modules/openxr/extensions/openxr_pico_controller_extension.cpp

@@ -0,0 +1,139 @@
+/**************************************************************************/
+/*  openxr_pico_controller_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_pico_controller_extension.h"
+
+#include "../action_map/openxr_interaction_profile_metadata.h"
+
+HashMap<String, bool *> OpenXRPicoControllerExtension::get_requested_extensions() {
+	HashMap<String, bool *> request_extensions;
+
+	// Note, this used to be XR_PICO_controller_interaction but that has since been retired
+	// and was never part of the OpenXX specification.
+	// All PICO devices should be updated to an OS supporting the official extension.
+
+	request_extensions[XR_BD_CONTROLLER_INTERACTION_EXTENSION_NAME] = &available;
+
+	return request_extensions;
+}
+
+bool OpenXRPicoControllerExtension::is_available() {
+	return available;
+}
+
+void OpenXRPicoControllerExtension::on_register_metadata() {
+	OpenXRInteractionProfileMetadata *metadata = OpenXRInteractionProfileMetadata::get_singleton();
+	ERR_FAIL_NULL(metadata);
+
+	// Make sure we switch to our new name.
+	metadata->register_profile_rename("/interaction_profiles/pico/neo3_controller", "/interaction_profiles/bytedance/pico_neo3_controller");
+
+	// Pico neo 3 controller.
+	metadata->register_interaction_profile("Pico Neo3 controller", "/interaction_profiles/bytedance/pico_neo3_controller", XR_BD_CONTROLLER_INTERACTION_EXTENSION_NAME);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "Grip pose", "/user/hand/left", "/user/hand/left/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "Grip pose", "/user/hand/right", "/user/hand/right/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "Aim pose", "/user/hand/left", "/user/hand/left/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "Aim pose", "/user/hand/right", "/user/hand/right/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "Palm pose", "/user/hand/left", "/user/hand/left/input/palm_ext/pose", XR_EXT_PALM_POSE_EXTENSION_NAME, OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "Palm pose", "/user/hand/right", "/user/hand/right/input/palm_ext/pose", XR_EXT_PALM_POSE_EXTENSION_NAME, OpenXRAction::OPENXR_ACTION_POSE);
+
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "Menu click", "/user/hand/left", "/user/hand/left/input/menu/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "Menu click", "/user/hand/right", "/user/hand/right/input/menu/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "System click", "/user/hand/left", "/user/hand/left/input/system/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "System click", "/user/hand/right", "/user/hand/right/input/system/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "X click", "/user/hand/left", "/user/hand/left/input/x/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "X touch", "/user/hand/left", "/user/hand/left/input/x/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "Y click", "/user/hand/left", "/user/hand/left/input/y/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "Y touch", "/user/hand/left", "/user/hand/left/input/y/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "A click", "/user/hand/right", "/user/hand/right/input/a/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "A touch", "/user/hand/right", "/user/hand/right/input/a/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "B click", "/user/hand/right", "/user/hand/right/input/b/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "B touch", "/user/hand/right", "/user/hand/right/input/b/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "Trigger", "/user/hand/left", "/user/hand/left/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "Trigger touch", "/user/hand/left", "/user/hand/left/input/trigger/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "Trigger", "/user/hand/right", "/user/hand/right/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "Trigger touch", "/user/hand/right", "/user/hand/right/input/trigger/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "Squeeze", "/user/hand/left", "/user/hand/left/input/squeeze/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "Squeeze", "/user/hand/right", "/user/hand/right/input/squeeze/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "Thumbstick", "/user/hand/left", "/user/hand/left/input/thumbstick", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "Thumbstick click", "/user/hand/left", "/user/hand/left/input/thumbstick/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "Thumbstick touch", "/user/hand/left", "/user/hand/left/input/thumbstick/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "Thumbstick", "/user/hand/right", "/user/hand/right/input/thumbstick", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "Thumbstick click", "/user/hand/right", "/user/hand/right/input/thumbstick/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "Thumbstick touch", "/user/hand/right", "/user/hand/right/input/thumbstick/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "Haptic output", "/user/hand/left", "/user/hand/left/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico_neo3_controller", "Haptic output", "/user/hand/right", "/user/hand/right/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+
+	// Pico 4 controller.
+	metadata->register_interaction_profile("Pico 4 controller", "/interaction_profiles/bytedance/pico4_controller", XR_BD_CONTROLLER_INTERACTION_EXTENSION_NAME);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "Grip pose", "/user/hand/left", "/user/hand/left/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "Grip pose", "/user/hand/right", "/user/hand/right/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "Aim pose", "/user/hand/left", "/user/hand/left/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "Aim pose", "/user/hand/right", "/user/hand/right/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "Palm pose", "/user/hand/left", "/user/hand/left/input/palm_ext/pose", XR_EXT_PALM_POSE_EXTENSION_NAME, OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "Palm pose", "/user/hand/right", "/user/hand/right/input/palm_ext/pose", XR_EXT_PALM_POSE_EXTENSION_NAME, OpenXRAction::OPENXR_ACTION_POSE);
+
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "Menu click", "/user/hand/left", "/user/hand/left/input/menu/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	// Note, no menu on right controller!
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "System click", "/user/hand/left", "/user/hand/left/input/system/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "System click", "/user/hand/right", "/user/hand/right/input/system/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "X click", "/user/hand/left", "/user/hand/left/input/x/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "X touch", "/user/hand/left", "/user/hand/left/input/x/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "Y click", "/user/hand/left", "/user/hand/left/input/y/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "Y touch", "/user/hand/left", "/user/hand/left/input/y/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "A click", "/user/hand/right", "/user/hand/right/input/a/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "A touch", "/user/hand/right", "/user/hand/right/input/a/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "B click", "/user/hand/right", "/user/hand/right/input/b/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "B touch", "/user/hand/right", "/user/hand/right/input/b/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "Trigger", "/user/hand/left", "/user/hand/left/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "Trigger touch", "/user/hand/left", "/user/hand/left/input/trigger/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "Trigger", "/user/hand/right", "/user/hand/right/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "Trigger touch", "/user/hand/right", "/user/hand/right/input/trigger/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "Squeeze", "/user/hand/left", "/user/hand/left/input/squeeze/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "Squeeze", "/user/hand/right", "/user/hand/right/input/squeeze/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "Thumbstick", "/user/hand/left", "/user/hand/left/input/thumbstick", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "Thumbstick click", "/user/hand/left", "/user/hand/left/input/thumbstick/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "Thumbstick touch", "/user/hand/left", "/user/hand/left/input/thumbstick/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "Thumbstick", "/user/hand/right", "/user/hand/right/input/thumbstick", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "Thumbstick click", "/user/hand/right", "/user/hand/right/input/thumbstick/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "Thumbstick touch", "/user/hand/right", "/user/hand/right/input/thumbstick/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "Haptic output", "/user/hand/left", "/user/hand/left/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/bytedance/pico4_controller", "Haptic output", "/user/hand/right", "/user/hand/right/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+}

engine/modules/openxr/extensions/openxr_pico_controller_extension.h

@@ -0,0 +1,48 @@
+/**************************************************************************/
+/*  openxr_pico_controller_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.                 */
+/**************************************************************************/
+
+#ifndef OPENXR_PICO_CONTROLLER_EXTENSION_H
+#define OPENXR_PICO_CONTROLLER_EXTENSION_H
+
+#include "openxr_extension_wrapper.h"
+
+class OpenXRPicoControllerExtension : public OpenXRExtensionWrapper {
+public:
+	virtual HashMap<String, bool *> get_requested_extensions() override;
+
+	bool is_available();
+
+	virtual void on_register_metadata() override;
+
+private:
+	bool available = false;
+};
+
+#endif // OPENXR_PICO_CONTROLLER_EXTENSION_H

engine/modules/openxr/extensions/openxr_wmr_controller_extension.cpp

@@ -0,0 +1,140 @@
+/**************************************************************************/
+/*  openxr_wmr_controller_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_wmr_controller_extension.h"
+
+#include "../action_map/openxr_interaction_profile_metadata.h"
+
+HashMap<String, bool *> OpenXRWMRControllerExtension::get_requested_extensions() {
+	HashMap<String, bool *> request_extensions;
+
+	// Note HP G2 is available on WMR and SteamVR, but Odessey is only available on WMR
+	request_extensions[XR_EXT_HP_MIXED_REALITY_CONTROLLER_EXTENSION_NAME] = &available[WMR_HPMR];
+	request_extensions[XR_EXT_SAMSUNG_ODYSSEY_CONTROLLER_EXTENSION_NAME] = &available[WMR_SAMSUNG_ODESSY];
+	request_extensions[XR_MSFT_HAND_INTERACTION_EXTENSION_NAME] = &available[WMR_HAND_INTERACTION];
+
+	return request_extensions;
+}
+
+bool OpenXRWMRControllerExtension::is_available(WMRControllers p_type) {
+	return available[p_type];
+}
+
+void OpenXRWMRControllerExtension::on_register_metadata() {
+	OpenXRInteractionProfileMetadata *metadata = OpenXRInteractionProfileMetadata::get_singleton();
+	ERR_FAIL_NULL(metadata);
+
+	// HP MR controller (newer G2 controllers)
+	metadata->register_interaction_profile("HPMR controller", "/interaction_profiles/hp/mixed_reality_controller", XR_EXT_HP_MIXED_REALITY_CONTROLLER_EXTENSION_NAME);
+	metadata->register_io_path("/interaction_profiles/hp/mixed_reality_controller", "Grip pose", "/user/hand/left", "/user/hand/left/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/hp/mixed_reality_controller", "Grip pose", "/user/hand/right", "/user/hand/right/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/hp/mixed_reality_controller", "Aim pose", "/user/hand/left", "/user/hand/left/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/hp/mixed_reality_controller", "Aim pose", "/user/hand/right", "/user/hand/right/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/hp/mixed_reality_controller", "Palm pose", "/user/hand/left", "/user/hand/left/input/palm_ext/pose", XR_EXT_PALM_POSE_EXTENSION_NAME, OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/hp/mixed_reality_controller", "Palm pose", "/user/hand/right", "/user/hand/right/input/palm_ext/pose", XR_EXT_PALM_POSE_EXTENSION_NAME, OpenXRAction::OPENXR_ACTION_POSE);
+
+	metadata->register_io_path("/interaction_profiles/hp/mixed_reality_controller", "Menu click", "/user/hand/left", "/user/hand/left/input/menu/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/hp/mixed_reality_controller", "Menu click", "/user/hand/right", "/user/hand/right/input/menu/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/hp/mixed_reality_controller", "X click", "/user/hand/left", "/user/hand/left/input/x/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/hp/mixed_reality_controller", "Y click", "/user/hand/left", "/user/hand/left/input/y/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/hp/mixed_reality_controller", "A click", "/user/hand/right", "/user/hand/right/input/a/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/hp/mixed_reality_controller", "B click", "/user/hand/right", "/user/hand/right/input/b/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/hp/mixed_reality_controller", "Trigger", "/user/hand/left", "/user/hand/left/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/hp/mixed_reality_controller", "Trigger click", "/user/hand/left", "/user/hand/left/input/trigger/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/hp/mixed_reality_controller", "Trigger", "/user/hand/right", "/user/hand/right/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/hp/mixed_reality_controller", "Trigger click", "/user/hand/right", "/user/hand/right/input/trigger/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/hp/mixed_reality_controller", "Squeeze", "/user/hand/left", "/user/hand/left/input/squeeze/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/hp/mixed_reality_controller", "Squeeze", "/user/hand/right", "/user/hand/right/input/squeeze/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+
+	metadata->register_io_path("/interaction_profiles/hp/mixed_reality_controller", "Thumbstick", "/user/hand/left", "/user/hand/left/input/thumbstick", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/hp/mixed_reality_controller", "Thumbstick click", "/user/hand/left", "/user/hand/left/input/thumbstick/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/hp/mixed_reality_controller", "Thumbstick", "/user/hand/right", "/user/hand/right/input/thumbstick", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/hp/mixed_reality_controller", "Thumbstick click", "/user/hand/right", "/user/hand/right/input/thumbstick/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/hp/mixed_reality_controller", "Haptic output", "/user/hand/left", "/user/hand/left/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/hp/mixed_reality_controller", "Haptic output", "/user/hand/right", "/user/hand/right/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+
+	// Samsung Odyssey controller
+	metadata->register_interaction_profile("Samsung Odyssey controller", "/interaction_profiles/samsung/odyssey_controller", XR_EXT_SAMSUNG_ODYSSEY_CONTROLLER_EXTENSION_NAME);
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Grip pose", "/user/hand/left", "/user/hand/left/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Grip pose", "/user/hand/right", "/user/hand/right/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Aim pose", "/user/hand/left", "/user/hand/left/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Aim pose", "/user/hand/right", "/user/hand/right/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Palm pose", "/user/hand/left", "/user/hand/left/input/palm_ext/pose", XR_EXT_PALM_POSE_EXTENSION_NAME, OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Palm pose", "/user/hand/right", "/user/hand/right/input/palm_ext/pose", XR_EXT_PALM_POSE_EXTENSION_NAME, OpenXRAction::OPENXR_ACTION_POSE);
+
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Menu click", "/user/hand/left", "/user/hand/left/input/menu/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Menu click", "/user/hand/right", "/user/hand/right/input/menu/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Trigger", "/user/hand/left", "/user/hand/left/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Trigger click", "/user/hand/left", "/user/hand/left/input/trigger/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Trigger", "/user/hand/right", "/user/hand/right/input/trigger/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Trigger click", "/user/hand/right", "/user/hand/right/input/trigger/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Squeeze click", "/user/hand/left", "/user/hand/left/input/squeeze/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Squeeze click", "/user/hand/right", "/user/hand/right/input/squeeze/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Thumbstick", "/user/hand/left", "/user/hand/left/input/thumbstick", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Thumbstick click", "/user/hand/left", "/user/hand/left/input/thumbstick/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Thumbstick", "/user/hand/right", "/user/hand/right/input/thumbstick", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Thumbstick click", "/user/hand/right", "/user/hand/right/input/thumbstick/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Trackpad", "/user/hand/left", "/user/hand/left/input/trackpad", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Trackpad click", "/user/hand/left", "/user/hand/left/input/trackpad/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Trackpad touch", "/user/hand/left", "/user/hand/left/input/trackpad/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Trackpad", "/user/hand/right", "/user/hand/right/input/trackpad", "", OpenXRAction::OPENXR_ACTION_VECTOR2);
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Trackpad click", "/user/hand/right", "/user/hand/right/input/trackpad/click", "", OpenXRAction::OPENXR_ACTION_BOOL);
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Trackpad touch", "/user/hand/right", "/user/hand/right/input/trackpad/touch", "", OpenXRAction::OPENXR_ACTION_BOOL);
+
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Haptic output", "/user/hand/left", "/user/hand/left/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+	metadata->register_io_path("/interaction_profiles/samsung/odyssey_controller", "Haptic output", "/user/hand/right", "/user/hand/right/output/haptic", "", OpenXRAction::OPENXR_ACTION_HAPTIC);
+
+	// MSFT Hand interaction profile, also supported by other headsets
+	metadata->register_interaction_profile("MSFT Hand interaction", "/interaction_profiles/microsoft/hand_interaction", XR_MSFT_HAND_INTERACTION_EXTENSION_NAME);
+	metadata->register_io_path("/interaction_profiles/microsoft/hand_interaction", "Grip pose", "/user/hand/left", "/user/hand/left/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/microsoft/hand_interaction", "Grip pose", "/user/hand/right", "/user/hand/right/input/grip/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/microsoft/hand_interaction", "Aim pose", "/user/hand/left", "/user/hand/left/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/microsoft/hand_interaction", "Aim pose", "/user/hand/right", "/user/hand/right/input/aim/pose", "", OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/microsoft/hand_interaction", "Pinch pose", "/user/hand/left", "/user/hand/left/input/pinch_ext/pose", XR_EXT_HAND_INTERACTION_EXTENSION_NAME, OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/microsoft/hand_interaction", "Pinch pose", "/user/hand/right", "/user/hand/right/input/pinch_ext/pose", XR_EXT_HAND_INTERACTION_EXTENSION_NAME, OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/microsoft/hand_interaction", "Poke pose", "/user/hand/left", "/user/hand/left/input/poke_ext/pose", XR_EXT_HAND_INTERACTION_EXTENSION_NAME, OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/microsoft/hand_interaction", "Poke pose", "/user/hand/right", "/user/hand/right/input/poke_ext/pose", XR_EXT_HAND_INTERACTION_EXTENSION_NAME, OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/microsoft/hand_interaction", "Palm pose", "/user/hand/left", "/user/hand/left/input/palm_ext/pose", XR_EXT_PALM_POSE_EXTENSION_NAME, OpenXRAction::OPENXR_ACTION_POSE);
+	metadata->register_io_path("/interaction_profiles/microsoft/hand_interaction", "Palm pose", "/user/hand/right", "/user/hand/right/input/palm_ext/pose", XR_EXT_PALM_POSE_EXTENSION_NAME, OpenXRAction::OPENXR_ACTION_POSE);
+
+	metadata->register_io_path("/interaction_profiles/microsoft/hand_interaction", "Select (pinch)", "/user/hand/left", "/user/hand/left/input/select/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/microsoft/hand_interaction", "Select (pinch)", "/user/hand/right", "/user/hand/right/input/select/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+
+	metadata->register_io_path("/interaction_profiles/microsoft/hand_interaction", "Squeeze (grab)", "/user/hand/left", "/user/hand/left/input/squeeze/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+	metadata->register_io_path("/interaction_profiles/microsoft/hand_interaction", "Squeeze (grab)", "/user/hand/right", "/user/hand/right/input/squeeze/value", "", OpenXRAction::OPENXR_ACTION_FLOAT);
+}

engine/modules/openxr/extensions/openxr_wmr_controller_extension.h

@@ -0,0 +1,55 @@
+/**************************************************************************/
+/*  openxr_wmr_controller_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.                 */
+/**************************************************************************/
+
+#ifndef OPENXR_WMR_CONTROLLER_EXTENSION_H
+#define OPENXR_WMR_CONTROLLER_EXTENSION_H
+
+#include "openxr_extension_wrapper.h"
+
+class OpenXRWMRControllerExtension : public OpenXRExtensionWrapper {
+public:
+	enum WMRControllers {
+		WMR_HPMR,
+		WMR_SAMSUNG_ODESSY,
+		WMR_HAND_INTERACTION,
+		WMR_MAX_CONTROLLERS
+	};
+
+	virtual HashMap<String, bool *> get_requested_extensions() override;
+
+	bool is_available(WMRControllers p_type);
+
+	virtual void on_register_metadata() override;
+
+private:
+	bool available[WMR_MAX_CONTROLLERS] = { false, false };
+};
+
+#endif // OPENXR_WMR_CONTROLLER_EXTENSION_H

engine/modules/openxr/extensions/platform/openxr_android_extension.cpp

@@ -0,0 +1,112 @@
+/**************************************************************************/
+/*  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;
+
+	request_extensions[XR_KHR_LOADER_INIT_ANDROID_EXTENSION_NAME] = &loader_init_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_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_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);
+}

engine/modules/openxr/extensions/platform/openxr_android_extension.h

@@ -0,0 +1,63 @@
+/**************************************************************************/
+/*  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.                 */
+/**************************************************************************/
+
+#ifndef OPENXR_ANDROID_EXTENSION_H
+#define OPENXR_ANDROID_EXTENSION_H
+
+#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 create_instance_extension_available = false;
+
+	// Initialize the loader
+	EXT_PROTO_XRRESULT_FUNC1(xrInitializeLoaderKHR, (const XrLoaderInitInfoBaseHeaderKHR *), loaderInitInfo)
+};
+
+#endif // OPENXR_ANDROID_EXTENSION_H

engine/modules/openxr/extensions/platform/openxr_opengl_extension.cpp

@@ -0,0 +1,461 @@
+/**************************************************************************/
+/*  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
+
+// On OpenGLES this is not defined in our standard headers..
+#ifndef GL_FRAMEBUFFER_SRGB
+#define GL_FRAMEBUFFER_SRGB 0x8DB9
+#endif
+
+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
+
+	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(X11_ENABLED)
+XrGraphicsBindingOpenGLXlibKHR OpenXROpenGLExtension::graphics_binding_gl;
+#endif
+
+void *OpenXROpenGLExtension::set_session_create_and_get_next_pointer(void *p_next_pointer) {
+	XrVersion desired_version = XR_MAKE_VERSION(3, 3, 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 WAYLAND_ENABLED
+	ERR_FAIL_COND_V_MSG(display_server->get_name() == "Wayland", p_next_pointer, "OpenXR is not yet supported on OpenGL Wayland.");
+#endif
+
+#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);
+#elif 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 = 0;
+#endif
+
+	return &graphics_binding_gl;
+}
+
+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);
+}
+
+void OpenXROpenGLExtension::on_pre_draw_viewport(RID p_render_target) {
+	if (srgb_ext_is_available) {
+		hw_linear_to_srgb_is_enabled = glIsEnabled(GL_FRAMEBUFFER_SRGB);
+		if (hw_linear_to_srgb_is_enabled) {
+			// Disable this.
+			glDisable(GL_FRAMEBUFFER_SRGB);
+		}
+	}
+}
+
+void OpenXROpenGLExtension::on_post_draw_viewport(RID p_render_target) {
+	if (srgb_ext_is_available && hw_linear_to_srgb_is_enabled) {
+		// Re-enable this.
+		glEnable(GL_FRAMEBUFFER_SRGB);
+	}
+}
+
+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 swapchaim image count [", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+		return false;
+	}
+
+#ifdef ANDROID_ENABLED
+	XrSwapchainImageOpenGLESKHR *images = (XrSwapchainImageOpenGLESKHR *)memalloc(sizeof(XrSwapchainImageOpenGLESKHR) * swapchain_length);
+#else
+	XrSwapchainImageOpenGLKHR *images = (XrSwapchainImageOpenGLKHR *)memalloc(sizeof(XrSwapchainImageOpenGLKHR) * swapchain_length);
+#endif
+	ERR_FAIL_NULL_V_MSG(images, false, "OpenXR Couldn't allocate memory for swap chain image");
+
+	for (uint64_t i = 0; i < swapchain_length; i++) {
+#ifdef ANDROID_ENABLED
+		images[i].type = XR_TYPE_SWAPCHAIN_IMAGE_OPENGL_ES_KHR;
+#else
+		images[i].type = XR_TYPE_SWAPCHAIN_IMAGE_OPENGL_KHR;
+#endif
+		images[i].next = nullptr;
+		images[i].image = 0;
+	}
+
+	result = xrEnumerateSwapchainImages(p_swapchain, swapchain_length, &swapchain_length, (XrSwapchainImageBaseHeader *)images);
+	if (XR_FAILED(result)) {
+		print_line("OpenXR: Failed to get swapchaim images [", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+		memfree(images);
+		return false;
+	}
+
+	SwapchainGraphicsData *data = memnew(SwapchainGraphicsData);
+	if (data == nullptr) {
+		print_line("OpenXR: Failed to allocate memory for swapchain data");
+		memfree(images);
+		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_external(
+				p_array_size == 1 ? GLES3::Texture::TYPE_2D : GLES3::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;
+
+	memfree(images);
+
+	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 (int i = 0; i < data->texture_rids.size(); i++) {
+		texture_storage->texture_free(data->texture_rids[i]);
+	}
+	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

engine/modules/openxr/extensions/platform/openxr_opengl_extension.h

@@ -0,0 +1,94 @@
+/**************************************************************************/
+/*  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.                 */
+/**************************************************************************/
+
+#ifndef OPENXR_OPENGL_EXTENSION_H
+#define OPENXR_OPENGL_EXTENSION_H
+
+#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 on_pre_draw_viewport(RID p_render_target) override;
+	virtual void on_post_draw_viewport(RID p_render_target) 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;
+
+private:
+	static OpenXROpenGLExtension *singleton;
+
+#ifdef WIN32
+	static XrGraphicsBindingOpenGLWin32KHR graphics_binding_gl;
+#elif defined(ANDROID_ENABLED)
+	static XrGraphicsBindingOpenGLESAndroidKHR graphics_binding_gl;
+#else // Linux/X11
+	static XrGraphicsBindingOpenGLXlibKHR graphics_binding_gl;
+#endif
+
+	struct SwapchainGraphicsData {
+		bool is_multiview;
+		Vector<RID> texture_rids;
+	};
+
+	bool srgb_ext_is_available = true;
+	bool hw_linear_to_srgb_is_enabled = false;
+
+	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
+
+#endif // OPENXR_OPENGL_EXTENSION_H

engine/modules/openxr/extensions/platform/openxr_vulkan_extension.cpp

@@ -0,0 +1,687 @@
+/**************************************************************************/
+/*  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 "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) {
+	XrSwapchainImageVulkanKHR *images = nullptr;
+
+	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 swapchaim image count [", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+		return false;
+	}
+
+	images = (XrSwapchainImageVulkanKHR *)memalloc(sizeof(XrSwapchainImageVulkanKHR) * swapchain_length);
+	ERR_FAIL_NULL_V_MSG(images, false, "OpenXR Couldn't allocate memory for swap chain image");
+
+	for (uint64_t i = 0; i < swapchain_length; i++) {
+		images[i].type = XR_TYPE_SWAPCHAIN_IMAGE_VULKAN_KHR;
+		images[i].next = nullptr;
+		images[i].image = VK_NULL_HANDLE;
+	}
+
+	result = xrEnumerateSwapchainImages(p_swapchain, swapchain_length, &swapchain_length, (XrSwapchainImageBaseHeader *)images);
+	if (XR_FAILED(result)) {
+		print_line("OpenXR: Failed to get swapchaim images [", OpenXRAPI::get_singleton()->get_error_string(result), "]");
+		memfree(images);
+		return false;
+	}
+
+	// SwapchainGraphicsData *data = (SwapchainGraphicsData *)memalloc(sizeof(SwapchainGraphicsData));
+	SwapchainGraphicsData *data = memnew(SwapchainGraphicsData);
+	if (data == nullptr) {
+		print_line("OpenXR: Failed to allocate memory for swapchain data");
+		memfree(images);
+		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_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("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("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++) {
+		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].image,
+				p_width,
+				p_height,
+				1,
+				p_array_size);
+
+		texture_rids.push_back(image_rid);
+	}
+
+	data->texture_rids = texture_rids;
+
+	memfree(images);
+
+	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];
+}
+
+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 (int i = 0; i < data->texture_rids.size(); i++) {
+		// 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(data->texture_rids[i]);
+	}
+	data->texture_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;
+	}
+}

engine/modules/openxr/extensions/platform/openxr_vulkan_extension.h

@@ -0,0 +1,91 @@
+/**************************************************************************/
+/*  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.                 */
+/**************************************************************************/
+
+#ifndef OPENXR_VULKAN_EXTENSION_H
+#define OPENXR_VULKAN_EXTENSION_H
+
+#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;
+
+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;
+	};
+
+	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)
+};
+
+#endif // OPENXR_VULKAN_EXTENSION_H