Add support for WebXR

1 files changed, 645 insertions, 0 deletions

diff --git a/modules/webxr/native/library_godot_webxr.js b/modules/webxr/native/library_godot_webxr.js
new file mode 100644
index 0000000000..447045ed27
--- /dev/null
+++ b/modules/webxr/native/library_godot_webxr.js
@@ -0,0 +1,645 @@
+/*************************************************************************/
+/*  library_godot_webxr.js                                               */
+/*************************************************************************/
+/*                       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.                */
+/*************************************************************************/
+const GodotWebXR = {
+	$GodotWebXR__deps: ['$Browser', '$GL', '$GodotRuntime'],
+	$GodotWebXR: {
+		gl: null,
+
+		texture_ids: [null, null],
+		textures: [null, null],
+
+		session: null,
+		space: null,
+		frame: null,
+		pose: null,
+
+		// Monkey-patch the requestAnimationFrame() used by Emscripten for the main
+		// loop, so that we can swap it out for XRSession.requestAnimationFrame()
+		// when an XR session is started.
+		orig_requestAnimationFrame: null,
+		requestAnimationFrame: (callback) => {
+			if (GodotWebXR.session && GodotWebXR.space) {
+				const onFrame = function (time, frame) {
+					GodotWebXR.frame = frame;
+					GodotWebXR.pose = frame.getViewerPose(GodotWebXR.space);
+					callback(time);
+					GodotWebXR.frame = null;
+					GodotWebXR.pose = null;
+				};
+				GodotWebXR.session.requestAnimationFrame(onFrame);
+			} else {
+				GodotWebXR.orig_requestAnimationFrame(callback);
+			}
+		},
+		monkeyPatchRequestAnimationFrame: (enable) => {
+			if (GodotWebXR.orig_requestAnimationFrame === null) {
+				GodotWebXR.orig_requestAnimationFrame = Browser.requestAnimationFrame;
+			}
+			Browser.requestAnimationFrame = enable
+				? GodotWebXR.requestAnimationFrame : GodotWebXR.orig_requestAnimationFrame;
+		},
+		pauseResumeMainLoop: () => {
+			// Once both GodotWebXR.session and GodotWebXR.space are set or
+			// unset, our monkey-patched requestAnimationFrame() should be
+			// enabled or disabled. When using the WebXR API Emulator, this
+			// gets picked up automatically, however, in the Oculus Browser
+			// on the Quest, we need to pause and resume the main loop.
+			Browser.pauseAsyncCallbacks();
+			Browser.mainLoop.pause();
+			window.setTimeout(function () {
+				Browser.resumeAsyncCallbacks();
+				Browser.mainLoop.resume();
+			}, 0);
+		},
+
+		// Some custom WebGL code for blitting our eye textures to the
+		// framebuffer we get from WebXR.
+		shaderProgram: null,
+		programInfo: null,
+		buffer: null,
+		// Vertex shader source.
+		vsSource: `
+			const vec2 scale = vec2(0.5, 0.5);
+			attribute vec4 aVertexPosition;
+
+			varying highp vec2 vTextureCoord;
+
+			void main () {
+				gl_Position = aVertexPosition;
+				vTextureCoord = aVertexPosition.xy * scale + scale;
+			}
+		`,
+		// Fragment shader source.
+		fsSource: `
+			varying highp vec2 vTextureCoord;
+
+			uniform sampler2D uSampler;
+
+			void main() {
+				gl_FragColor = texture2D(uSampler, vTextureCoord);
+			}
+		`,
+
+		initShaderProgram: (gl, vsSource, fsSource) => {
+			const vertexShader = GodotWebXR.loadShader(gl, gl.VERTEX_SHADER, vsSource);
+			const fragmentShader = GodotWebXR.loadShader(gl, gl.FRAGMENT_SHADER, fsSource);
+
+			const shaderProgram = gl.createProgram();
+			gl.attachShader(shaderProgram, vertexShader);
+			gl.attachShader(shaderProgram, fragmentShader);
+			gl.linkProgram(shaderProgram);
+
+			if (!gl.getProgramParameter(shaderProgram, gl.LINK_STATUS)) {
+				GodotRuntime.error(`Unable to initialize the shader program: ${gl.getProgramInfoLog(shaderProgram)}`);
+				return null;
+			}
+
+			return shaderProgram;
+		},
+		loadShader: (gl, type, source) => {
+			const shader = gl.createShader(type);
+			gl.shaderSource(shader, source);
+			gl.compileShader(shader);
+
+			if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
+				GodotRuntime.error(`An error occurred compiling the shader: ${gl.getShaderInfoLog(shader)}`);
+				gl.deleteShader(shader);
+				return null;
+			}
+
+			return shader;
+		},
+		initBuffer: (gl) => {
+			const positionBuffer = gl.createBuffer();
+			gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);
+			const positions = [
+				-1.0, -1.0,
+				1.0, -1.0,
+				-1.0, 1.0,
+				1.0, 1.0,
+			];
+			gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(positions), gl.STATIC_DRAW);
+			return positionBuffer;
+		},
+		blitTexture: (gl, texture) => {
+			if (GodotWebXR.shaderProgram === null) {
+				GodotWebXR.shaderProgram = GodotWebXR.initShaderProgram(gl, GodotWebXR.vsSource, GodotWebXR.fsSource);
+				GodotWebXR.programInfo = {
+					program: GodotWebXR.shaderProgram,
+					attribLocations: {
+						vertexPosition: gl.getAttribLocation(GodotWebXR.shaderProgram, 'aVertexPosition'),
+					},
+					uniformLocations: {
+						uSampler: gl.getUniformLocation(GodotWebXR.shaderProgram, 'uSampler'),
+					},
+				};
+				GodotWebXR.buffer = GodotWebXR.initBuffer(gl);
+			}
+
+			const orig_program = gl.getParameter(gl.CURRENT_PROGRAM);
+			gl.useProgram(GodotWebXR.shaderProgram);
+
+			gl.bindBuffer(gl.ARRAY_BUFFER, GodotWebXR.buffer);
+			gl.vertexAttribPointer(GodotWebXR.programInfo.attribLocations.vertexPosition, 2, gl.FLOAT, false, 0, 0);
+			gl.enableVertexAttribArray(GodotWebXR.programInfo.attribLocations.vertexPosition);
+
+			gl.activeTexture(gl.TEXTURE0);
+			gl.bindTexture(gl.TEXTURE_2D, texture);
+			gl.uniform1i(GodotWebXR.programInfo.uniformLocations.uSampler, 0);
+
+			gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);
+
+			// Restore state.
+			gl.bindTexture(gl.TEXTURE_2D, null);
+			gl.disableVertexAttribArray(GodotWebXR.programInfo.attribLocations.vertexPosition);
+			gl.bindBuffer(gl.ARRAY_BUFFER, null);
+			gl.useProgram(orig_program);
+		},
+
+		// Holds the controllers list between function calls.
+		controllers: [],
+
+		// Updates controllers array, where the left hand (or sole tracker) is
+		// the first element, and the right hand is the second element, and any
+		// others placed at the 3rd position and up.
+		sampleControllers: () => {
+			if (!GodotWebXR.session || !GodotWebXR.frame) {
+				return;
+			}
+
+			let other_index = 2;
+			const controllers = [];
+			GodotWebXR.session.inputSources.forEach((input_source) => {
+				if (input_source.targetRayMode === 'tracked-pointer') {
+					if (input_source.handedness === 'right') {
+						controllers[1] = input_source;
+					} else if (input_source.handedness === 'left' || !controllers[0]) {
+						controllers[0] = input_source;
+					}
+				} else {
+					controllers[other_index++] = input_source;
+				}
+			});
+			GodotWebXR.controllers = controllers;
+		},
+
+		getControllerId: (input_source) => GodotWebXR.controllers.indexOf(input_source),
+	},
+
+	godot_webxr_is_supported__proxy: 'sync',
+	godot_webxr_is_supported__sig: 'i',
+	godot_webxr_is_supported: function () {
+		return !!navigator.xr;
+	},
+
+	godot_webxr_is_session_supported__proxy: 'sync',
+	godot_webxr_is_session_supported__sig: 'vii',
+	godot_webxr_is_session_supported: function (p_session_mode, p_callback) {
+		const session_mode = GodotRuntime.parseString(p_session_mode);
+		const cb = GodotRuntime.get_func(p_callback);
+		if (navigator.xr) {
+			navigator.xr.isSessionSupported(session_mode).then(function (supported) {
+				const c_str = GodotRuntime.allocString(session_mode);
+				cb(c_str, supported ? 1 : 0);
+				GodotRuntime.free(c_str);
+			});
+		} else {
+			const c_str = GodotRuntime.allocString(session_mode);
+			cb(c_str, 0);
+			GodotRuntime.free(c_str);
+		}
+	},
+
+	godot_webxr_initialize__deps: ['emscripten_webgl_get_current_context'],
+	godot_webxr_initialize__proxy: 'sync',
+	godot_webxr_initialize__sig: 'viiiiiiiiii',
+	godot_webxr_initialize: function (p_session_mode, p_required_features, p_optional_features, p_requested_reference_spaces, p_on_session_started, p_on_session_ended, p_on_session_failed, p_on_controller_changed, p_on_input_event, p_on_simple_event) {
+		GodotWebXR.monkeyPatchRequestAnimationFrame(true);
+
+		const session_mode = GodotRuntime.parseString(p_session_mode);
+		const required_features = GodotRuntime.parseString(p_required_features).split(',').map((s) => s.trim()).filter((s) => s !== '');
+		const optional_features = GodotRuntime.parseString(p_optional_features).split(',').map((s) => s.trim()).filter((s) => s !== '');
+		const requested_reference_space_types = GodotRuntime.parseString(p_requested_reference_spaces).split(',').map((s) => s.trim());
+		const onstarted = GodotRuntime.get_func(p_on_session_started);
+		const onended = GodotRuntime.get_func(p_on_session_ended);
+		const onfailed = GodotRuntime.get_func(p_on_session_failed);
+		const oncontroller = GodotRuntime.get_func(p_on_controller_changed);
+		const oninputevent = GodotRuntime.get_func(p_on_input_event);
+		const onsimpleevent = GodotRuntime.get_func(p_on_simple_event);
+
+		const session_init = {};
+		if (required_features.length > 0) {
+			session_init['requiredFeatures'] = required_features;
+		}
+		if (optional_features.length > 0) {
+			session_init['optionalFeatures'] = optional_features;
+		}
+
+		navigator.xr.requestSession(session_mode, session_init).then(function (session) {
+			GodotWebXR.session = session;
+
+			session.addEventListener('end', function (evt) {
+				onended();
+			});
+
+			session.addEventListener('inputsourceschange', function (evt) {
+				let controller_changed = false;
+				[evt.added, evt.removed].forEach((lst) => {
+					lst.forEach((input_source) => {
+						if (input_source.targetRayMode === 'tracked-pointer') {
+							controller_changed = true;
+						}
+					});
+				});
+				if (controller_changed) {
+					oncontroller();
+				}
+			});
+
+			['selectstart', 'select', 'selectend', 'squeezestart', 'squeeze', 'squeezeend'].forEach((input_event) => {
+				session.addEventListener(input_event, function (evt) {
+					const c_str = GodotRuntime.allocString(input_event);
+					oninputevent(c_str, GodotWebXR.getControllerId(evt.inputSource));
+					GodotRuntime.free(c_str);
+				});
+			});
+
+			session.addEventListener('visibilitychange', function (evt) {
+				const c_str = GodotRuntime.allocString('visibility_state_changed');
+				onsimpleevent(c_str);
+				GodotRuntime.free(c_str);
+			});
+
+			const gl_context_handle = _emscripten_webgl_get_current_context(); // eslint-disable-line no-undef
+			const gl = GL.getContext(gl_context_handle).GLctx;
+			GodotWebXR.gl = gl;
+
+			gl.makeXRCompatible().then(function () {
+				session.updateRenderState({
+					baseLayer: new XRWebGLLayer(session, gl),
+				});
+
+				function onReferenceSpaceSuccess(reference_space, reference_space_type) {
+					GodotWebXR.space = reference_space;
+
+					// Using reference_space.addEventListener() crashes when
+					// using the polyfill with the WebXR Emulator extension,
+					// so we set the event property instead.
+					reference_space.onreset = function (evt) {
+						const c_str = GodotRuntime.allocString('reference_space_reset');
+						onsimpleevent(c_str);
+						GodotRuntime.free(c_str);
+					};
+
+					// Now that both GodotWebXR.session and GodotWebXR.space are
+					// set, we need to pause and resume the main loop for the XR
+					// main loop to kick in.
+					GodotWebXR.pauseResumeMainLoop();
+
+					// Call in setTimeout() so that errors in the onstarted()
+					// callback don't bubble up here and cause Godot to try the
+					// next reference space.
+					window.setTimeout(function () {
+						const c_str = GodotRuntime.allocString(reference_space_type);
+						onstarted(c_str);
+						GodotRuntime.free(c_str);
+					}, 0);
+				}
+
+				function requestReferenceSpace() {
+					const reference_space_type = requested_reference_space_types.shift();
+					session.requestReferenceSpace(reference_space_type)
+						.then((refSpace) => {
+							onReferenceSpaceSuccess(refSpace, reference_space_type);
+						})
+						.catch(() => {
+							if (requested_reference_space_types.length === 0) {
+								const c_str = GodotRuntime.allocString('Unable to get any of the requested reference space types');
+								onfailed(c_str);
+								GodotRuntime.free(c_str);
+							} else {
+								requestReferenceSpace();
+							}
+						});
+				}
+
+				requestReferenceSpace();
+			}).catch(function (error) {
+				const c_str = GodotRuntime.allocString(`Unable to make WebGL context compatible with WebXR: ${error}`);
+				onfailed(c_str);
+				GodotRuntime.free(c_str);
+			});
+		}).catch(function (error) {
+			const c_str = GodotRuntime.allocString(`Unable to start session: ${error}`);
+			onfailed(c_str);
+			GodotRuntime.free(c_str);
+		});
+	},
+
+	godot_webxr_uninitialize__proxy: 'sync',
+	godot_webxr_uninitialize__sig: 'v',
+	godot_webxr_uninitialize: function () {
+		if (GodotWebXR.session) {
+			GodotWebXR.session.end()
+				// Prevent exception when session has already ended.
+				.catch((e) => { });
+		}
+
+		// Clean-up the textures we allocated for each view.
+		const gl = GodotWebXR.gl;
+		for (let i = 0; i < GodotWebXR.textures.length; i++) {
+			const texture = GodotWebXR.textures[i];
+			if (texture !== null) {
+				gl.deleteTexture(texture);
+			}
+			GodotWebXR.textures[i] = null;
+			GodotWebXR.texture_ids[i] = null;
+		}
+
+		GodotWebXR.session = null;
+		GodotWebXR.space = null;
+		GodotWebXR.frame = null;
+		GodotWebXR.pose = null;
+
+		// Disable the monkey-patched window.requestAnimationFrame() and
+		// pause/restart the main loop to activate it on all platforms.
+		GodotWebXR.monkeyPatchRequestAnimationFrame(false);
+		GodotWebXR.pauseResumeMainLoop();
+	},
+
+	godot_webxr_get_render_targetsize__proxy: 'sync',
+	godot_webxr_get_render_targetsize__sig: 'i',
+	godot_webxr_get_render_targetsize: function () {
+		if (!GodotWebXR.session || !GodotWebXR.pose) {
+			return 0;
+		}
+
+		const glLayer = GodotWebXR.session.renderState.baseLayer;
+		const view = GodotWebXR.pose.views[0];
+		const viewport = glLayer.getViewport(view);
+
+		const buf = GodotRuntime.malloc(2 * 4);
+		GodotRuntime.setHeapValue(buf + 0, viewport.width, 'i32');
+		GodotRuntime.setHeapValue(buf + 4, viewport.height, 'i32');
+		return buf;
+	},
+
+	godot_webxr_get_transform_for_eye__proxy: 'sync',
+	godot_webxr_get_transform_for_eye__sig: 'ii',
+	godot_webxr_get_transform_for_eye: function (p_eye) {
+		if (!GodotWebXR.session || !GodotWebXR.pose) {
+			return 0;
+		}
+
+		const views = GodotWebXR.pose.views;
+		let matrix;
+		if (p_eye === 0) {
+			matrix = GodotWebXR.pose.transform.matrix;
+		} else {
+			matrix = views[p_eye - 1].transform.matrix;
+		}
+		const buf = GodotRuntime.malloc(16 * 4);
+		for (let i = 0; i < 16; i++) {
+			GodotRuntime.setHeapValue(buf + (i * 4), matrix[i], 'float');
+		}
+		return buf;
+	},
+
+	godot_webxr_get_projection_for_eye__proxy: 'sync',
+	godot_webxr_get_projection_for_eye__sig: 'ii',
+	godot_webxr_get_projection_for_eye: function (p_eye) {
+		if (!GodotWebXR.session || !GodotWebXR.pose) {
+			return 0;
+		}
+
+		const view_index = (p_eye === 2 /* ARVRInterface::EYE_RIGHT */) ? 1 : 0;
+		const matrix = GodotWebXR.pose.views[view_index].projectionMatrix;
+		const buf = GodotRuntime.malloc(16 * 4);
+		for (let i = 0; i < 16; i++) {
+			GodotRuntime.setHeapValue(buf + (i * 4), matrix[i], 'float');
+		}
+		return buf;
+	},
+
+	godot_webxr_get_external_texture_for_eye__proxy: 'sync',
+	godot_webxr_get_external_texture_for_eye__sig: 'ii',
+	godot_webxr_get_external_texture_for_eye: function (p_eye) {
+		if (!GodotWebXR.session || !GodotWebXR.pose) {
+			return 0;
+		}
+
+		const view_index = (p_eye === 2 /* ARVRInterface::EYE_RIGHT */) ? 1 : 0;
+		if (GodotWebXR.texture_ids[view_index]) {
+			return GodotWebXR.texture_ids[view_index];
+		}
+
+		const glLayer = GodotWebXR.session.renderState.baseLayer;
+		const view = GodotWebXR.pose.views[view_index];
+		const viewport = glLayer.getViewport(view);
+		const gl = GodotWebXR.gl;
+
+		const texture = gl.createTexture();
+		gl.bindTexture(gl.TEXTURE_2D, texture);
+		gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, viewport.width, viewport.height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
+
+		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
+		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
+		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
+		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
+		gl.bindTexture(gl.TEXTURE_2D, null);
+
+		const texture_id = GL.getNewId(GL.textures);
+		GL.textures[texture_id] = texture;
+		GodotWebXR.textures[view_index] = texture;
+		GodotWebXR.texture_ids[view_index] = texture_id;
+		return texture_id;
+	},
+
+	godot_webxr_commit_for_eye__proxy: 'sync',
+	godot_webxr_commit_for_eye__sig: 'vi',
+	godot_webxr_commit_for_eye: function (p_eye) {
+		if (!GodotWebXR.session || !GodotWebXR.pose) {
+			return;
+		}
+
+		const view_index = (p_eye === 2 /* ARVRInterface::EYE_RIGHT */) ? 1 : 0;
+		const glLayer = GodotWebXR.session.renderState.baseLayer;
+		const view = GodotWebXR.pose.views[view_index];
+		const viewport = glLayer.getViewport(view);
+		const gl = GodotWebXR.gl;
+
+		const orig_framebuffer = gl.getParameter(gl.FRAMEBUFFER_BINDING);
+		const orig_viewport = gl.getParameter(gl.VIEWPORT);
+
+		// Bind to WebXR's framebuffer.
+		gl.bindFramebuffer(gl.FRAMEBUFFER, glLayer.framebuffer);
+		gl.viewport(viewport.x, viewport.y, viewport.width, viewport.height);
+
+		GodotWebXR.blitTexture(gl, GodotWebXR.textures[view_index]);
+
+		// Restore state.
+		gl.bindFramebuffer(gl.FRAMEBUFFER, orig_framebuffer);
+		gl.viewport(orig_viewport[0], orig_viewport[1], orig_viewport[2], orig_viewport[3]);
+	},
+
+	godot_webxr_sample_controller_data__proxy: 'sync',
+	godot_webxr_sample_controller_data__sig: 'v',
+	godot_webxr_sample_controller_data: function () {
+		GodotWebXR.sampleControllers();
+	},
+
+	godot_webxr_get_controller_count__proxy: 'sync',
+	godot_webxr_get_controller_count__sig: 'i',
+	godot_webxr_get_controller_count: function () {
+		if (!GodotWebXR.session || !GodotWebXR.frame) {
+			return 0;
+		}
+		return GodotWebXR.controllers.length;
+	},
+
+	godot_webxr_is_controller_connected__proxy: 'sync',
+	godot_webxr_is_controller_connected__sig: 'ii',
+	godot_webxr_is_controller_connected: function (p_controller) {
+		if (!GodotWebXR.session || !GodotWebXR.frame) {
+			return false;
+		}
+		return !!GodotWebXR.controllers[p_controller];
+	},
+
+	godot_webxr_get_controller_transform__proxy: 'sync',
+	godot_webxr_get_controller_transform__sig: 'ii',
+	godot_webxr_get_controller_transform: function (p_controller) {
+		if (!GodotWebXR.session || !GodotWebXR.frame) {
+			return 0;
+		}
+
+		const controller = GodotWebXR.controllers[p_controller];
+		if (!controller) {
+			return 0;
+		}
+
+		const frame = GodotWebXR.frame;
+		const space = GodotWebXR.space;
+
+		const pose = frame.getPose(controller.targetRaySpace, space);
+		if (!pose) {
+			// This can mean that the controller lost tracking.
+			return 0;
+		}
+		const matrix = pose.transform.matrix;
+
+		const buf = GodotRuntime.malloc(16 * 4);
+		for (let i = 0; i < 16; i++) {
+			GodotRuntime.setHeapValue(buf + (i * 4), matrix[i], 'float');
+		}
+		return buf;
+	},
+
+	godot_webxr_get_controller_buttons__proxy: 'sync',
+	godot_webxr_get_controller_buttons__sig: 'ii',
+	godot_webxr_get_controller_buttons: function (p_controller) {
+		if (GodotWebXR.controllers.length === 0) {
+			return 0;
+		}
+
+		const controller = GodotWebXR.controllers[p_controller];
+		if (!controller || !controller.gamepad) {
+			return 0;
+		}
+
+		const button_count = controller.gamepad.buttons.length;
+
+		const buf = GodotRuntime.malloc((button_count + 1) * 4);
+		GodotRuntime.setHeapValue(buf, button_count, 'i32');
+		for (let i = 0; i < button_count; i++) {
+			GodotRuntime.setHeapValue(buf + 4 + (i * 4), controller.gamepad.buttons[i].value, 'float');
+		}
+		return buf;
+	},
+
+	godot_webxr_get_controller_axes__proxy: 'sync',
+	godot_webxr_get_controller_axes__sig: 'ii',
+	godot_webxr_get_controller_axes: function (p_controller) {
+		if (GodotWebXR.controllers.length === 0) {
+			return 0;
+		}
+
+		const controller = GodotWebXR.controllers[p_controller];
+		if (!controller || !controller.gamepad) {
+			return 0;
+		}
+
+		const axes_count = controller.gamepad.axes.length;
+
+		const buf = GodotRuntime.malloc((axes_count + 1) * 4);
+		GodotRuntime.setHeapValue(buf, axes_count, 'i32');
+		for (let i = 0; i < axes_count; i++) {
+			GodotRuntime.setHeapValue(buf + 4 + (i * 4), controller.gamepad.axes[i], 'float');
+		}
+		return buf;
+	},
+
+	godot_webxr_get_visibility_state__proxy: 'sync',
+	godot_webxr_get_visibility_state__sig: 'i',
+	godot_webxr_get_visibility_state: function () {
+		if (!GodotWebXR.session || !GodotWebXR.session.visibilityState) {
+			return 0;
+		}
+
+		return GodotRuntime.allocString(GodotWebXR.session.visibilityState);
+	},
+
+	godot_webxr_get_bounds_geometry__proxy: 'sync',
+	godot_webxr_get_bounds_geometry__sig: 'i',
+	godot_webxr_get_bounds_geometry: function () {
+		if (!GodotWebXR.space || !GodotWebXR.space.boundsGeometry) {
+			return 0;
+		}
+
+		const point_count = GodotWebXR.space.boundsGeometry.length;
+		if (point_count === 0) {
+			return 0;
+		}
+
+		const buf = GodotRuntime.malloc(((point_count * 3) + 1) * 4);
+		GodotRuntime.setHeapValue(buf, point_count, 'i32');
+		for (let i = 0; i < point_count; i++) {
+			const point = GodotWebXR.space.boundsGeometry[i];
+			GodotRuntime.setHeapValue(buf + ((i * 3) + 1) * 4, point.x, 'float');
+			GodotRuntime.setHeapValue(buf + ((i * 3) + 2) * 4, point.y, 'float');
+			GodotRuntime.setHeapValue(buf + ((i * 3) + 3) * 4, point.z, 'float');
+		}
+
+		return buf;
+	},
+};
+
+autoAddDeps(GodotWebXR, '$GodotWebXR');
+mergeInto(LibraryManager.library, GodotWebXR);