/**************************************************************************/
/* library_godot_webxr.js */
/**************************************************************************/
/* 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. */
/**************************************************************************/
const GodotWebXR = {
$GodotWebXR__deps: ['$Browser', '$GL', '$GodotRuntime', '$runtimeKeepalivePush', '$runtimeKeepalivePop'],
$GodotWebXR: {
gl: null,
session: null,
gl_binding: null,
layer: null,
space: null,
frame: null,
pose: null,
view_count: 1,
input_sources: new Array(16),
touches: new Array(5),
onsimpleevent: 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.mainLoop.pause();
runtimeKeepalivePush();
window.setTimeout(function () {
runtimeKeepalivePop();
Browser.mainLoop.resume();
}, 0);
},
getLayer: () => {
const new_view_count = (GodotWebXR.pose) ? GodotWebXR.pose.views.length : 1;
let layer = GodotWebXR.layer;
// If the view count hasn't changed since creating this layer, then
// we can simply return it.
if (layer && GodotWebXR.view_count === new_view_count) {
return layer;
}
if (!GodotWebXR.session || !GodotWebXR.gl_binding) {
return null;
}
const gl = GodotWebXR.gl;
layer = GodotWebXR.gl_binding.createProjectionLayer({
textureType: new_view_count > 1 ? 'texture-array' : 'texture',
colorFormat: gl.RGBA8,
depthFormat: gl.DEPTH_COMPONENT24,
});
GodotWebXR.session.updateRenderState({ layers: [layer] });
GodotWebXR.layer = layer;
GodotWebXR.view_count = new_view_count;
return layer;
},
getSubImage: () => {
if (!GodotWebXR.pose) {
return null;
}
const layer = GodotWebXR.getLayer();
if (layer === null) {
return null;
}
// Because we always use "texture-array" for multiview and "texture"
// when there is only 1 view, it should be safe to only grab the
// subimage for the first view.
return GodotWebXR.gl_binding.getViewSubImage(layer, GodotWebXR.pose.views[0]);
},
getTextureId: (texture) => {
if (texture.name !== undefined) {
return texture.name;
}
const id = GL.getNewId(GL.textures);
texture.name = id;
GL.textures[id] = texture;
return id;
},
addInputSource: (input_source) => {
let name = -1;
if (input_source.targetRayMode === 'tracked-pointer' && input_source.handedness === 'left') {
name = 0;
} else if (input_source.targetRayMode === 'tracked-pointer' && input_source.handedness === 'right') {
name = 1;
} else {
for (let i = 2; i < 16; i++) {
if (!GodotWebXR.input_sources[i]) {
name = i;
break;
}
}
}
if (name >= 0) {
GodotWebXR.input_sources[name] = input_source;
input_source.name = name;
// Find a free touch index for screen sources.
if (input_source.targetRayMode === 'screen') {
let touch_index = -1;
for (let i = 0; i < 5; i++) {
if (!GodotWebXR.touches[i]) {
touch_index = i;
break;
}
}
if (touch_index >= 0) {
GodotWebXR.touches[touch_index] = input_source;
input_source.touch_index = touch_index;
}
}
}
return name;
},
removeInputSource: (input_source) => {
if (input_source.name !== undefined) {
const name = input_source.name;
if (name >= 0 && name < 16) {
GodotWebXR.input_sources[name] = null;
}
if (input_source.touch_index !== undefined) {
const touch_index = input_source.touch_index;
if (touch_index >= 0 && touch_index < 5) {
GodotWebXR.touches[touch_index] = null;
}
}
return name;
}
return -1;
},
getInputSourceId: (input_source) => {
if (input_source !== undefined) {
return input_source.name;
}
return -1;
},
getTouchIndex: (input_source) => {
if (input_source.touch_index !== undefined) {
return input_source.touch_index;
}
return -1;
},
},
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: 'viiiiiiiii',
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_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 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) {
evt.added.forEach(GodotWebXR.addInputSource);
evt.removed.forEach(GodotWebXR.removeInputSource);
});
['selectstart', 'selectend', 'squeezestart', 'squeezeend'].forEach((input_event, index) => {
session.addEventListener(input_event, function (evt) {
// Since this happens in-between normal frames, we need to
// grab the frame from the event in order to get poses for
// the input sources.
GodotWebXR.frame = evt.frame;
oninputevent(index, GodotWebXR.getInputSourceId(evt.inputSource));
GodotWebXR.frame = null;
});
});
session.addEventListener('visibilitychange', function (evt) {
const c_str = GodotRuntime.allocString('visibility_state_changed');
onsimpleevent(c_str);
GodotRuntime.free(c_str);
});
// Store onsimpleevent so we can use it later.
GodotWebXR.onsimpleevent = onsimpleevent;
const gl_context_handle = _emscripten_webgl_get_current_context();
const gl = GL.getContext(gl_context_handle).GLctx;
GodotWebXR.gl = gl;
gl.makeXRCompatible().then(function () {
GodotWebXR.gl_binding = new XRWebGLBinding(session, gl);
// This will trigger the layer to get created.
GodotWebXR.getLayer();
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 reference_space_c_str = GodotRuntime.allocString(reference_space_type);
const enabled_features = 'enabledFeatures' in session ? Array.from(session.enabledFeatures) : [];
const enabled_features_c_str = GodotRuntime.allocString(enabled_features.join(','));
const environment_blend_mode = 'environmentBlendMode' in session ? session.environmentBlendMode : '';
const environment_blend_mode_c_str = GodotRuntime.allocString(environment_blend_mode);
onstarted(reference_space_c_str, enabled_features_c_str, environment_blend_mode_c_str);
GodotRuntime.free(reference_space_c_str);
GodotRuntime.free(enabled_features_c_str);
GodotRuntime.free(environment_blend_mode_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) => { });
}
GodotWebXR.session = null;
GodotWebXR.gl_binding = null;
GodotWebXR.layer = null;
GodotWebXR.space = null;
GodotWebXR.frame = null;
GodotWebXR.pose = null;
GodotWebXR.view_count = 1;
GodotWebXR.input_sources = new Array(16);
GodotWebXR.touches = new Array(5);
GodotWebXR.onsimpleevent = 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_view_count__proxy: 'sync',
godot_webxr_get_view_count__sig: 'i',
godot_webxr_get_view_count: function () {
if (!GodotWebXR.session || !GodotWebXR.pose) {
return 1;
}
const view_count = GodotWebXR.pose.views.length;
return view_count > 0 ? view_count : 1;
},
godot_webxr_get_render_target_size__proxy: 'sync',
godot_webxr_get_render_target_size__sig: 'ii',
godot_webxr_get_render_target_size: function (r_size) {
const subimage = GodotWebXR.getSubImage();
if (subimage === null) {
return false;
}
GodotRuntime.setHeapValue(r_size + 0, subimage.viewport.width, 'i32');
GodotRuntime.setHeapValue(r_size + 4, subimage.viewport.height, 'i32');
return true;
},
godot_webxr_get_transform_for_view__proxy: 'sync',
godot_webxr_get_transform_for_view__sig: 'iii',
godot_webxr_get_transform_for_view: function (p_view, r_transform) {
if (!GodotWebXR.session || !GodotWebXR.pose) {
return false;
}
const views = GodotWebXR.pose.views;
let matrix;
if (p_view >= 0) {
matrix = views[p_view].transform.matrix;
} else {
// For -1 (or any other negative value) return the HMD transform.
matrix = GodotWebXR.pose.transform.matrix;
}
for (let i = 0; i < 16; i++) {
GodotRuntime.setHeapValue(r_transform + (i * 4), matrix[i], 'float');
}
return true;
},
godot_webxr_get_projection_for_view__proxy: 'sync',
godot_webxr_get_projection_for_view__sig: 'iii',
godot_webxr_get_projection_for_view: function (p_view, r_transform) {
if (!GodotWebXR.session || !GodotWebXR.pose) {
return false;
}
const matrix = GodotWebXR.pose.views[p_view].projectionMatrix;
for (let i = 0; i < 16; i++) {
GodotRuntime.setHeapValue(r_transform + (i * 4), matrix[i], 'float');
}
return true;
},
godot_webxr_get_color_texture__proxy: 'sync',
godot_webxr_get_color_texture__sig: 'i',
godot_webxr_get_color_texture: function () {
const subimage = GodotWebXR.getSubImage();
if (subimage === null) {
return 0;
}
return GodotWebXR.getTextureId(subimage.colorTexture);
},
godot_webxr_get_depth_texture__proxy: 'sync',
godot_webxr_get_depth_texture__sig: 'i',
godot_webxr_get_depth_texture: function () {
const subimage = GodotWebXR.getSubImage();
if (subimage === null) {
return 0;
}
if (!subimage.depthStencilTexture) {
return 0;
}
return GodotWebXR.getTextureId(subimage.depthStencilTexture);
},
godot_webxr_get_velocity_texture__proxy: 'sync',
godot_webxr_get_velocity_texture__sig: 'i',
godot_webxr_get_velocity_texture: function () {
const subimage = GodotWebXR.getSubImage();
if (subimage === null) {
return 0;
}
if (!subimage.motionVectorTexture) {
return 0;
}
return GodotWebXR.getTextureId(subimage.motionVectorTexture);
},
godot_webxr_update_input_source__proxy: 'sync',
godot_webxr_update_input_source__sig: 'iiiiiiiiiiiiiii',
godot_webxr_update_input_source: function (p_input_source_id, r_target_pose, r_target_ray_mode, r_touch_index, r_has_grip_pose, r_grip_pose, r_has_standard_mapping, r_button_count, r_buttons, r_axes_count, r_axes, r_has_hand_data, r_hand_joints, r_hand_radii) {
if (!GodotWebXR.session || !GodotWebXR.frame) {
return 0;
}
if (p_input_source_id < 0 || p_input_source_id >= GodotWebXR.input_sources.length || !GodotWebXR.input_sources[p_input_source_id]) {
return false;
}
const input_source = GodotWebXR.input_sources[p_input_source_id];
const frame = GodotWebXR.frame;
const space = GodotWebXR.space;
// Target pose.
const target_pose = frame.getPose(input_source.targetRaySpace, space);
if (!target_pose) {
// This can mean that the controller lost tracking.
return false;
}
const target_pose_matrix = target_pose.transform.matrix;
for (let i = 0; i < 16; i++) {
GodotRuntime.setHeapValue(r_target_pose + (i * 4), target_pose_matrix[i], 'float');
}
// Target ray mode.
let target_ray_mode = 0;
switch (input_source.targetRayMode) {
case 'gaze':
target_ray_mode = 1;
break;
case 'tracked-pointer':
target_ray_mode = 2;
break;
case 'screen':
target_ray_mode = 3;
break;
default:
}
GodotRuntime.setHeapValue(r_target_ray_mode, target_ray_mode, 'i32');
// Touch index.
GodotRuntime.setHeapValue(r_touch_index, GodotWebXR.getTouchIndex(input_source), 'i32');
// Grip pose.
let has_grip_pose = false;
if (input_source.gripSpace) {
const grip_pose = frame.getPose(input_source.gripSpace, space);
if (grip_pose) {
const grip_pose_matrix = grip_pose.transform.matrix;
for (let i = 0; i < 16; i++) {
GodotRuntime.setHeapValue(r_grip_pose + (i * 4), grip_pose_matrix[i], 'float');
}
has_grip_pose = true;
}
}
GodotRuntime.setHeapValue(r_has_grip_pose, has_grip_pose ? 1 : 0, 'i32');
// Gamepad data (mapping, buttons and axes).
let has_standard_mapping = false;
let button_count = 0;
let axes_count = 0;
if (input_source.gamepad) {
if (input_source.gamepad.mapping === 'xr-standard') {
has_standard_mapping = true;
}
button_count = Math.min(input_source.gamepad.buttons.length, 10);
for (let i = 0; i < button_count; i++) {
GodotRuntime.setHeapValue(r_buttons + (i * 4), input_source.gamepad.buttons[i].value, 'float');
}
axes_count = Math.min(input_source.gamepad.axes.length, 10);
for (let i = 0; i < axes_count; i++) {
GodotRuntime.setHeapValue(r_axes + (i * 4), input_source.gamepad.axes[i], 'float');
}
}
GodotRuntime.setHeapValue(r_has_standard_mapping, has_standard_mapping ? 1 : 0, 'i32');
GodotRuntime.setHeapValue(r_button_count, button_count, 'i32');
GodotRuntime.setHeapValue(r_axes_count, axes_count, 'i32');
// Hand tracking data.
let has_hand_data = false;
if (input_source.hand && r_hand_joints !== 0 && r_hand_radii !== 0) {
const hand_joint_array = new Float32Array(25 * 16);
const hand_radii_array = new Float32Array(25);
if (frame.fillPoses(input_source.hand.values(), space, hand_joint_array) && frame.fillJointRadii(input_source.hand.values(), hand_radii_array)) {
GodotRuntime.heapCopy(HEAPF32, hand_joint_array, r_hand_joints);
GodotRuntime.heapCopy(HEAPF32, hand_radii_array, r_hand_radii);
has_hand_data = true;
}
}
GodotRuntime.setHeapValue(r_has_hand_data, has_hand_data ? 1 : 0, 'i32');
return true;
},
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: 'ii',
godot_webxr_get_bounds_geometry: function (r_points) {
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 * 4);
for (let i = 0; i < point_count; i++) {
const point = GodotWebXR.space.boundsGeometry[i];
GodotRuntime.setHeapValue(buf + ((i * 3) + 0) * 4, point.x, 'float');
GodotRuntime.setHeapValue(buf + ((i * 3) + 1) * 4, point.y, 'float');
GodotRuntime.setHeapValue(buf + ((i * 3) + 2) * 4, point.z, 'float');
}
GodotRuntime.setHeapValue(r_points, buf, 'i32');
return point_count;
},
godot_webxr_get_frame_rate__proxy: 'sync',
godot_webxr_get_frame_rate__sig: 'i',
godot_webxr_get_frame_rate: function () {
if (!GodotWebXR.session || GodotWebXR.session.frameRate === undefined) {
return 0;
}
return GodotWebXR.session.frameRate;
},
godot_webxr_update_target_frame_rate__proxy: 'sync',
godot_webxr_update_target_frame_rate__sig: 'vi',
godot_webxr_update_target_frame_rate: function (p_frame_rate) {
if (!GodotWebXR.session || GodotWebXR.session.updateTargetFrameRate === undefined) {
return;
}
GodotWebXR.session.updateTargetFrameRate(p_frame_rate).then(() => {
const c_str = GodotRuntime.allocString('display_refresh_rate_changed');
GodotWebXR.onsimpleevent(c_str);
GodotRuntime.free(c_str);
});
},
godot_webxr_get_supported_frame_rates__proxy: 'sync',
godot_webxr_get_supported_frame_rates__sig: 'ii',
godot_webxr_get_supported_frame_rates: function (r_frame_rates) {
if (!GodotWebXR.session || GodotWebXR.session.supportedFrameRates === undefined) {
return 0;
}
const frame_rate_count = GodotWebXR.session.supportedFrameRates.length;
if (frame_rate_count === 0) {
return 0;
}
const buf = GodotRuntime.malloc(frame_rate_count * 4);
for (let i = 0; i < frame_rate_count; i++) {
GodotRuntime.setHeapValue(buf + (i * 4), GodotWebXR.session.supportedFrameRates[i], 'float');
}
GodotRuntime.setHeapValue(r_frame_rates, buf, 'i32');
return frame_rate_count;
},
};
autoAddDeps(GodotWebXR, '$GodotWebXR');
mergeInto(LibraryManager.library, GodotWebXR);
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