Merge pull request #37694 from BastiaanOlij/arvr_to_xr

The great ARVR to XR rename!

6 files changed, 608 insertions, 0 deletions

diff --git a/modules/gdnative/xr/SCsub b/modules/gdnative/xr/SCsub
new file mode 100644
index 0000000000..0b2db3b504
--- /dev/null
+++ b/modules/gdnative/xr/SCsub
@@ -0,0 +1,6 @@
+#!/usr/bin/env python
+
+Import("env")
+Import("env_gdnative")
+
+env_gdnative.add_source_files(env.modules_sources, "*.cpp")
diff --git a/modules/gdnative/xr/config.py b/modules/gdnative/xr/config.py
new file mode 100644
index 0000000000..d22f9454ed
--- /dev/null
+++ b/modules/gdnative/xr/config.py
@@ -0,0 +1,6 @@
+def can_build(env, platform):
+    return True
+
+
+def configure(env):
+    pass
diff --git a/modules/gdnative/xr/register_types.cpp b/modules/gdnative/xr/register_types.cpp
new file mode 100644
index 0000000000..da3a7dc4b8
--- /dev/null
+++ b/modules/gdnative/xr/register_types.cpp
@@ -0,0 +1,40 @@
+/*************************************************************************/
+/*  register_types.cpp                                                   */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#include "register_types.h"
+#include "xr_interface_gdnative.h"
+
+void register_xr_types() {
+	ClassDB::register_class<XRInterfaceGDNative>();
+	ClassDB::add_compatibility_class("ARVRInterfaceGDNative", "XRInterfaceGDNative");
+}
+
+void unregister_xr_types() {
+}
diff --git a/modules/gdnative/xr/register_types.h b/modules/gdnative/xr/register_types.h
new file mode 100644
index 0000000000..2501d28651
--- /dev/null
+++ b/modules/gdnative/xr/register_types.h
@@ -0,0 +1,37 @@
+/*************************************************************************/
+/*  register_types.h                                                     */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#ifndef XR_REGISTER_TYPES_H
+#define XR_REGISTER_TYPES_H
+
+void register_xr_types();
+void unregister_xr_types();
+
+#endif // XR_REGISTER_TYPES_H
diff --git a/modules/gdnative/xr/xr_interface_gdnative.cpp b/modules/gdnative/xr/xr_interface_gdnative.cpp
new file mode 100644
index 0000000000..0451945139
--- /dev/null
+++ b/modules/gdnative/xr/xr_interface_gdnative.cpp
@@ -0,0 +1,428 @@
+/*************************************************************************/
+/*  xr_interface_gdnative.cpp                                            */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#include "xr_interface_gdnative.h"
+#include "core/input/input_filter.h"
+#include "servers/rendering/rendering_server_globals.h"
+#include "servers/xr/xr_positional_tracker.h"
+
+void XRInterfaceGDNative::_bind_methods() {
+	ADD_PROPERTY_DEFAULT("interface_is_initialized", false);
+	ADD_PROPERTY_DEFAULT("ar_is_anchor_detection_enabled", false);
+}
+
+XRInterfaceGDNative::XRInterfaceGDNative() {
+	print_verbose("Construct gdnative interface\n");
+
+	// we won't have our data pointer until our library gets set
+	data = nullptr;
+
+	interface = nullptr;
+}
+
+XRInterfaceGDNative::~XRInterfaceGDNative() {
+	print_verbose("Destruct gdnative interface\n");
+
+	if (interface != nullptr && is_initialized()) {
+		uninitialize();
+	};
+
+	// cleanup after ourselves
+	cleanup();
+}
+
+void XRInterfaceGDNative::cleanup() {
+	if (interface != nullptr) {
+		interface->destructor(data);
+		data = nullptr;
+		interface = nullptr;
+	}
+}
+
+void XRInterfaceGDNative::set_interface(const godot_xr_interface_gdnative *p_interface) {
+	// this should only be called once, just being paranoid..
+	if (interface) {
+		cleanup();
+	}
+
+	// bind to our interface
+	interface = p_interface;
+
+	// Now we do our constructing...
+	data = interface->constructor((godot_object *)this);
+}
+
+StringName XRInterfaceGDNative::get_name() const {
+
+	ERR_FAIL_COND_V(interface == nullptr, StringName());
+
+	godot_string result = interface->get_name(data);
+
+	StringName name = *(String *)&result;
+
+	godot_string_destroy(&result);
+
+	return name;
+}
+
+int XRInterfaceGDNative::get_capabilities() const {
+	int capabilities;
+
+	ERR_FAIL_COND_V(interface == nullptr, 0); // 0 = None
+
+	capabilities = interface->get_capabilities(data);
+
+	return capabilities;
+}
+
+bool XRInterfaceGDNative::get_anchor_detection_is_enabled() const {
+
+	ERR_FAIL_COND_V(interface == nullptr, false);
+
+	return interface->get_anchor_detection_is_enabled(data);
+}
+
+void XRInterfaceGDNative::set_anchor_detection_is_enabled(bool p_enable) {
+
+	ERR_FAIL_COND(interface == nullptr);
+
+	interface->set_anchor_detection_is_enabled(data, p_enable);
+}
+
+int XRInterfaceGDNative::get_camera_feed_id() {
+
+	ERR_FAIL_COND_V(interface == nullptr, 0);
+
+	return (unsigned int)interface->get_camera_feed_id(data);
+}
+
+bool XRInterfaceGDNative::is_stereo() {
+	bool stereo;
+
+	ERR_FAIL_COND_V(interface == nullptr, false);
+
+	stereo = interface->is_stereo(data);
+
+	return stereo;
+}
+
+bool XRInterfaceGDNative::is_initialized() const {
+
+	ERR_FAIL_COND_V(interface == nullptr, false);
+
+	return interface->is_initialized(data);
+}
+
+bool XRInterfaceGDNative::initialize() {
+	ERR_FAIL_COND_V(interface == nullptr, false);
+
+	bool initialized = interface->initialize(data);
+
+	if (initialized) {
+		// if we successfully initialize our interface and we don't have a primary interface yet, this becomes our primary interface
+
+		XRServer *xr_server = XRServer::get_singleton();
+		if ((xr_server != nullptr) && (xr_server->get_primary_interface() == nullptr)) {
+			xr_server->set_primary_interface(this);
+		};
+	};
+
+	return initialized;
+}
+
+void XRInterfaceGDNative::uninitialize() {
+	ERR_FAIL_COND(interface == nullptr);
+
+	XRServer *xr_server = XRServer::get_singleton();
+	if (xr_server != nullptr) {
+		// Whatever happens, make sure this is no longer our primary interface
+		xr_server->clear_primary_interface_if(this);
+	}
+
+	interface->uninitialize(data);
+}
+
+Size2 XRInterfaceGDNative::get_render_targetsize() {
+
+	ERR_FAIL_COND_V(interface == nullptr, Size2());
+
+	godot_vector2 result = interface->get_render_targetsize(data);
+	Vector2 *vec = (Vector2 *)&result;
+
+	return *vec;
+}
+
+Transform XRInterfaceGDNative::get_transform_for_eye(XRInterface::Eyes p_eye, const Transform &p_cam_transform) {
+	Transform *ret;
+
+	ERR_FAIL_COND_V(interface == nullptr, Transform());
+
+	godot_transform t = interface->get_transform_for_eye(data, (int)p_eye, (godot_transform *)&p_cam_transform);
+
+	ret = (Transform *)&t;
+
+	return *ret;
+}
+
+CameraMatrix XRInterfaceGDNative::get_projection_for_eye(XRInterface::Eyes p_eye, real_t p_aspect, real_t p_z_near, real_t p_z_far) {
+	CameraMatrix cm;
+
+	ERR_FAIL_COND_V(interface == nullptr, CameraMatrix());
+
+	interface->fill_projection_for_eye(data, (godot_real *)cm.matrix, (godot_int)p_eye, p_aspect, p_z_near, p_z_far);
+
+	return cm;
+}
+
+unsigned int XRInterfaceGDNative::get_external_texture_for_eye(XRInterface::Eyes p_eye) {
+
+	ERR_FAIL_COND_V(interface == nullptr, 0);
+
+	return (unsigned int)interface->get_external_texture_for_eye(data, (godot_int)p_eye);
+}
+
+void XRInterfaceGDNative::commit_for_eye(XRInterface::Eyes p_eye, RID p_render_target, const Rect2 &p_screen_rect) {
+
+	ERR_FAIL_COND(interface == nullptr);
+
+	interface->commit_for_eye(data, (godot_int)p_eye, (godot_rid *)&p_render_target, (godot_rect2 *)&p_screen_rect);
+}
+
+void XRInterfaceGDNative::process() {
+	ERR_FAIL_COND(interface == nullptr);
+
+	interface->process(data);
+}
+
+void XRInterfaceGDNative::notification(int p_what) {
+	ERR_FAIL_COND(interface == nullptr);
+
+	interface->notification(data, p_what);
+}
+
+/////////////////////////////////////////////////////////////////////////////////////
+// some helper callbacks
+
+extern "C" {
+
+void GDAPI godot_xr_register_interface(const godot_xr_interface_gdnative *p_interface) {
+	// Must be on a version 4 plugin
+	ERR_FAIL_COND_MSG(p_interface->version.major < 4, "GDNative XR interfaces build for Godot 3.x are not supported.");
+
+	Ref<XRInterfaceGDNative> new_interface;
+	new_interface.instance();
+	new_interface->set_interface((const godot_xr_interface_gdnative *)p_interface);
+	XRServer::get_singleton()->add_interface(new_interface);
+}
+
+godot_real GDAPI godot_xr_get_worldscale() {
+	XRServer *xr_server = XRServer::get_singleton();
+	ERR_FAIL_NULL_V(xr_server, 1.0);
+
+	return xr_server->get_world_scale();
+}
+
+godot_transform GDAPI godot_xr_get_reference_frame() {
+	godot_transform reference_frame;
+	Transform *reference_frame_ptr = (Transform *)&reference_frame;
+
+	XRServer *xr_server = XRServer::get_singleton();
+	if (xr_server != nullptr) {
+		*reference_frame_ptr = xr_server->get_reference_frame();
+	} else {
+		godot_transform_new_identity(&reference_frame);
+	}
+
+	return reference_frame;
+}
+
+void GDAPI godot_xr_blit(godot_int p_eye, godot_rid *p_render_target, godot_rect2 *p_rect) {
+	// blits out our texture as is, handy for preview display of one of the eyes that is already rendered with lens distortion on an external HMD
+	XRInterface::Eyes eye = (XRInterface::Eyes)p_eye;
+#if 0
+	RID *render_target = (RID *)p_render_target;
+#endif
+	Rect2 screen_rect = *(Rect2 *)p_rect;
+
+	if (eye == XRInterface::EYE_LEFT) {
+		screen_rect.size.x /= 2.0;
+	} else if (p_eye == XRInterface::EYE_RIGHT) {
+		screen_rect.size.x /= 2.0;
+		screen_rect.position.x += screen_rect.size.x;
+	}
+#ifndef _MSC_VER
+#warning this needs to be redone
+#endif
+#if 0
+	RSG::rasterizer->blit_render_target_to_screen(*render_target, screen_rect, 0);
+#endif
+}
+
+godot_int GDAPI godot_xr_get_texid(godot_rid *p_render_target) {
+	// In order to send off our textures to display on our hardware we need the opengl texture ID instead of the render target RID
+	// This is a handy function to expose that.
+#if 0
+	RID *render_target = (RID *)p_render_target;
+
+	RID eye_texture = RSG::storage->render_target_get_texture(*render_target);
+#endif
+
+#ifndef _MSC_VER
+#warning need to obtain this ID again
+#endif
+	uint32_t texid = 0; //RS::get_singleton()->texture_get_texid(eye_texture);
+
+	return texid;
+}
+
+godot_int GDAPI godot_xr_add_controller(char *p_device_name, godot_int p_hand, godot_bool p_tracks_orientation, godot_bool p_tracks_position) {
+	XRServer *xr_server = XRServer::get_singleton();
+	ERR_FAIL_NULL_V(xr_server, 0);
+
+	InputFilter *input = InputFilter::get_singleton();
+	ERR_FAIL_NULL_V(input, 0);
+
+	XRPositionalTracker *new_tracker = memnew(XRPositionalTracker);
+	new_tracker->set_name(p_device_name);
+	new_tracker->set_type(XRServer::TRACKER_CONTROLLER);
+	if (p_hand == 1) {
+		new_tracker->set_hand(XRPositionalTracker::TRACKER_LEFT_HAND);
+	} else if (p_hand == 2) {
+		new_tracker->set_hand(XRPositionalTracker::TRACKER_RIGHT_HAND);
+	}
+
+	// also register as joystick...
+	int joyid = input->get_unused_joy_id();
+	if (joyid != -1) {
+		new_tracker->set_joy_id(joyid);
+		input->joy_connection_changed(joyid, true, p_device_name, "");
+	}
+
+	if (p_tracks_orientation) {
+		Basis orientation;
+		new_tracker->set_orientation(orientation);
+	}
+	if (p_tracks_position) {
+		Vector3 position;
+		new_tracker->set_position(position);
+	}
+
+	// add our tracker to our server and remember its pointer
+	xr_server->add_tracker(new_tracker);
+
+	// note, this ID is only unique within controllers!
+	return new_tracker->get_tracker_id();
+}
+
+void GDAPI godot_xr_remove_controller(godot_int p_controller_id) {
+	XRServer *xr_server = XRServer::get_singleton();
+	ERR_FAIL_NULL(xr_server);
+
+	InputFilter *input = InputFilter::get_singleton();
+	ERR_FAIL_NULL(input);
+
+	XRPositionalTracker *remove_tracker = xr_server->find_by_type_and_id(XRServer::TRACKER_CONTROLLER, p_controller_id);
+	if (remove_tracker != nullptr) {
+		// unset our joystick if applicable
+		int joyid = remove_tracker->get_joy_id();
+		if (joyid != -1) {
+			input->joy_connection_changed(joyid, false, "", "");
+			remove_tracker->set_joy_id(-1);
+		}
+
+		// remove our tracker from our server
+		xr_server->remove_tracker(remove_tracker);
+		memdelete(remove_tracker);
+	}
+}
+
+void GDAPI godot_xr_set_controller_transform(godot_int p_controller_id, godot_transform *p_transform, godot_bool p_tracks_orientation, godot_bool p_tracks_position) {
+	XRServer *xr_server = XRServer::get_singleton();
+	ERR_FAIL_NULL(xr_server);
+
+	XRPositionalTracker *tracker = xr_server->find_by_type_and_id(XRServer::TRACKER_CONTROLLER, p_controller_id);
+	if (tracker != nullptr) {
+		Transform *transform = (Transform *)p_transform;
+		if (p_tracks_orientation) {
+			tracker->set_orientation(transform->basis);
+		}
+		if (p_tracks_position) {
+			tracker->set_rw_position(transform->origin);
+		}
+	}
+}
+
+void GDAPI godot_xr_set_controller_button(godot_int p_controller_id, godot_int p_button, godot_bool p_is_pressed) {
+	XRServer *xr_server = XRServer::get_singleton();
+	ERR_FAIL_NULL(xr_server);
+
+	InputFilter *input = InputFilter::get_singleton();
+	ERR_FAIL_NULL(input);
+
+	XRPositionalTracker *tracker = xr_server->find_by_type_and_id(XRServer::TRACKER_CONTROLLER, p_controller_id);
+	if (tracker != nullptr) {
+		int joyid = tracker->get_joy_id();
+		if (joyid != -1) {
+			input->joy_button(joyid, p_button, p_is_pressed);
+		}
+	}
+}
+
+void GDAPI godot_xr_set_controller_axis(godot_int p_controller_id, godot_int p_axis, godot_real p_value, godot_bool p_can_be_negative) {
+	XRServer *xr_server = XRServer::get_singleton();
+	ERR_FAIL_NULL(xr_server);
+
+	InputFilter *input = InputFilter::get_singleton();
+	ERR_FAIL_NULL(input);
+
+	XRPositionalTracker *tracker = xr_server->find_by_type_and_id(XRServer::TRACKER_CONTROLLER, p_controller_id);
+	if (tracker != nullptr) {
+		int joyid = tracker->get_joy_id();
+		if (joyid != -1) {
+			InputFilter::JoyAxis jx;
+			jx.min = p_can_be_negative ? -1 : 0;
+			jx.value = p_value;
+			input->joy_axis(joyid, p_axis, jx);
+		}
+	}
+}
+
+godot_real GDAPI godot_xr_get_controller_rumble(godot_int p_controller_id) {
+	XRServer *xr_server = XRServer::get_singleton();
+	ERR_FAIL_NULL_V(xr_server, 0.0);
+
+	XRPositionalTracker *tracker = xr_server->find_by_type_and_id(XRServer::TRACKER_CONTROLLER, p_controller_id);
+	if (tracker != nullptr) {
+		return tracker->get_rumble();
+	}
+
+	return 0.0;
+}
+}
diff --git a/modules/gdnative/xr/xr_interface_gdnative.h b/modules/gdnative/xr/xr_interface_gdnative.h
new file mode 100644
index 0000000000..64f1282a7e
--- /dev/null
+++ b/modules/gdnative/xr/xr_interface_gdnative.h
@@ -0,0 +1,91 @@
+/*************************************************************************/
+/*  xr_interface_gdnative.h                                              */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#ifndef XR_INTERFACE_GDNATIVE_H
+#define XR_INTERFACE_GDNATIVE_H
+
+#include "modules/gdnative/gdnative.h"
+#include "servers/xr/xr_interface.h"
+
+/**
+	@authors Hinsbart & Karroffel & Mux213
+
+	This subclass of our AR/VR interface forms a bridge to GDNative.
+*/
+
+class XRInterfaceGDNative : public XRInterface {
+	GDCLASS(XRInterfaceGDNative, XRInterface);
+
+	void cleanup();
+
+protected:
+	const godot_xr_interface_gdnative *interface;
+	void *data;
+
+	static void _bind_methods();
+
+public:
+	/** general interface information **/
+	XRInterfaceGDNative();
+	~XRInterfaceGDNative();
+
+	void set_interface(const godot_xr_interface_gdnative *p_interface);
+
+	virtual StringName get_name() const;
+	virtual int get_capabilities() const;
+
+	virtual bool is_initialized() const;
+	virtual bool initialize();
+	virtual void uninitialize();
+
+	/** specific to AR **/
+	virtual bool get_anchor_detection_is_enabled() const;
+	virtual void set_anchor_detection_is_enabled(bool p_enable);
+	virtual int get_camera_feed_id();
+
+	/** rendering and internal **/
+	virtual Size2 get_render_targetsize();
+	virtual bool is_stereo();
+	virtual Transform get_transform_for_eye(XRInterface::Eyes p_eye, const Transform &p_cam_transform);
+
+	// we expose a Vector<float> version of this function to GDNative
+	Vector<float> _get_projection_for_eye(XRInterface::Eyes p_eye, real_t p_aspect, real_t p_z_near, real_t p_z_far);
+
+	// and a CameraMatrix version to XRServer
+	virtual CameraMatrix get_projection_for_eye(XRInterface::Eyes p_eye, real_t p_aspect, real_t p_z_near, real_t p_z_far);
+
+	virtual unsigned int get_external_texture_for_eye(XRInterface::Eyes p_eye);
+	virtual void commit_for_eye(XRInterface::Eyes p_eye, RID p_render_target, const Rect2 &p_screen_rect);
+
+	virtual void process();
+	virtual void notification(int p_what);
+};
+
+#endif // XR_INTERFACE_GDNATIVE_H