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library_browser.js
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library_browser.js
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/**
* @license
* Copyright 2011 The Emscripten Authors
* SPDX-License-Identifier: MIT
*/
// Utilities for browser environments
var LibraryBrowser = {
$Browser__deps: [
'$setMainLoop',
'$callUserCallback',
'$safeSetTimeout',
'$warnOnce',
'emscripten_set_main_loop_timing',
#if FILESYSTEM
'$preloadPlugins',
#if MAIN_MODULE
'$preloadedWasm',
#endif
#endif
],
$Browser__postset: `
// exports
Module["requestFullscreen"] = Browser.requestFullscreen;
#if ASSERTIONS
Module["requestFullScreen"] = Browser.requestFullScreen;
#endif
Module["requestAnimationFrame"] = Browser.requestAnimationFrame;
Module["setCanvasSize"] = Browser.setCanvasSize;
Module["pauseMainLoop"] = Browser.mainLoop.pause;
Module["resumeMainLoop"] = Browser.mainLoop.resume;
Module["getUserMedia"] = Browser.getUserMedia;
Module["createContext"] = Browser.createContext;
var preloadedImages = {};
var preloadedAudios = {};`,
$Browser: {
mainLoop: {
running: false,
scheduler: null,
method: '',
// Each main loop is numbered with a ID in sequence order. Only one main
// loop can run at a time. This variable stores the ordinal number of the
// main loop that is currently allowed to run. All previous main loops
// will quit themselves. This is incremented whenever a new main loop is
// created.
/** @type{number} */
currentlyRunningMainloop: 0,
// The main loop tick function that will be called at each iteration.
func: null,
// The argument that will be passed to the main loop. (of type void*)
arg: 0,
timingMode: 0,
timingValue: 0,
currentFrameNumber: 0,
queue: [],
pause() {
Browser.mainLoop.scheduler = null;
// Incrementing this signals the previous main loop that it's now become old, and it must return.
Browser.mainLoop.currentlyRunningMainloop++;
},
resume() {
Browser.mainLoop.currentlyRunningMainloop++;
var timingMode = Browser.mainLoop.timingMode;
var timingValue = Browser.mainLoop.timingValue;
var func = Browser.mainLoop.func;
Browser.mainLoop.func = null;
// do not set timing and call scheduler, we will do it on the next lines
setMainLoop(func, 0, false, Browser.mainLoop.arg, true);
_emscripten_set_main_loop_timing(timingMode, timingValue);
Browser.mainLoop.scheduler();
},
updateStatus() {
#if expectToReceiveOnModule('setStatus')
if (Module['setStatus']) {
var message = Module['statusMessage'] || 'Please wait...';
var remaining = Browser.mainLoop.remainingBlockers;
var expected = Browser.mainLoop.expectedBlockers;
if (remaining) {
if (remaining < expected) {
Module['setStatus'](`{message} ({expected - remaining}/{expected})`);
} else {
Module['setStatus'](message);
}
} else {
Module['setStatus']('');
}
}
#endif
},
runIter(func) {
if (ABORT) return;
#if expectToReceiveOnModule('preMainLoop')
if (Module['preMainLoop']) {
var preRet = Module['preMainLoop']();
if (preRet === false) {
return; // |return false| skips a frame
}
}
#endif
callUserCallback(func);
#if expectToReceiveOnModule('postMainLoop')
Module['postMainLoop']?.();
#endif
}
},
isFullscreen: false,
pointerLock: false,
moduleContextCreatedCallbacks: [],
workers: [],
init() {
if (Browser.initted) return;
Browser.initted = true;
#if FILESYSTEM
// Support for plugins that can process preloaded files. You can add more of these to
// your app by creating and appending to preloadPlugins.
//
// Each plugin is asked if it can handle a file based on the file's name. If it can,
// it is given the file's raw data. When it is done, it calls a callback with the file's
// (possibly modified) data. For example, a plugin might decompress a file, or it
// might create some side data structure for use later (like an Image element, etc.).
var imagePlugin = {};
imagePlugin['canHandle'] = function imagePlugin_canHandle(name) {
return !Module.noImageDecoding && /\.(jpg|jpeg|png|bmp)$/i.test(name);
};
imagePlugin['handle'] = function imagePlugin_handle(byteArray, name, onload, onerror) {
var b = new Blob([byteArray], { type: Browser.getMimetype(name) });
if (b.size !== byteArray.length) { // Safari bug #118630
// Safari's Blob can only take an ArrayBuffer
b = new Blob([(new Uint8Array(byteArray)).buffer], { type: Browser.getMimetype(name) });
}
var url = URL.createObjectURL(b);
#if ASSERTIONS
assert(typeof url == 'string', 'createObjectURL must return a url as a string');
#endif
var img = new Image();
img.onload = () => {
#if ASSERTIONS
assert(img.complete, `Image ${name} could not be decoded`);
#endif
var canvas = /** @type {!HTMLCanvasElement} */ (document.createElement('canvas'));
canvas.width = img.width;
canvas.height = img.height;
var ctx = canvas.getContext('2d');
ctx.drawImage(img, 0, 0);
preloadedImages[name] = canvas;
URL.revokeObjectURL(url);
onload?.(byteArray);
};
img.onerror = (event) => {
err(`Image ${url} could not be decoded`);
onerror?.();
};
img.src = url;
};
preloadPlugins.push(imagePlugin);
var audioPlugin = {};
audioPlugin['canHandle'] = function audioPlugin_canHandle(name) {
return !Module.noAudioDecoding && name.substr(-4) in { '.ogg': 1, '.wav': 1, '.mp3': 1 };
};
audioPlugin['handle'] = function audioPlugin_handle(byteArray, name, onload, onerror) {
var done = false;
function finish(audio) {
if (done) return;
done = true;
preloadedAudios[name] = audio;
onload?.(byteArray);
}
function fail() {
if (done) return;
done = true;
preloadedAudios[name] = new Audio(); // empty shim
onerror?.();
}
var b = new Blob([byteArray], { type: Browser.getMimetype(name) });
var url = URL.createObjectURL(b); // XXX we never revoke this!
#if ASSERTIONS
assert(typeof url == 'string', 'createObjectURL must return a url as a string');
#endif
var audio = new Audio();
audio.addEventListener('canplaythrough', () => finish(audio), false); // use addEventListener due to chromium bug 124926
audio.onerror = function audio_onerror(event) {
if (done) return;
err(`warning: browser could not fully decode audio ${name}, trying slower base64 approach`);
function encode64(data) {
var BASE = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
var PAD = '=';
var ret = '';
var leftchar = 0;
var leftbits = 0;
for (var i = 0; i < data.length; i++) {
leftchar = (leftchar << 8) | data[i];
leftbits += 8;
while (leftbits >= 6) {
var curr = (leftchar >> (leftbits-6)) & 0x3f;
leftbits -= 6;
ret += BASE[curr];
}
}
if (leftbits == 2) {
ret += BASE[(leftchar&3) << 4];
ret += PAD + PAD;
} else if (leftbits == 4) {
ret += BASE[(leftchar&0xf) << 2];
ret += PAD;
}
return ret;
}
audio.src = 'data:audio/x-' + name.substr(-3) + ';base64,' + encode64(byteArray);
finish(audio); // we don't wait for confirmation this worked - but it's worth trying
};
audio.src = url;
// workaround for chrome bug 124926 - we do not always get oncanplaythrough or onerror
safeSetTimeout(() => {
finish(audio); // try to use it even though it is not necessarily ready to play
}, 10000);
};
preloadPlugins.push(audioPlugin);
#endif
// Canvas event setup
function pointerLockChange() {
Browser.pointerLock = document['pointerLockElement'] === Module['canvas'] ||
document['mozPointerLockElement'] === Module['canvas'] ||
document['webkitPointerLockElement'] === Module['canvas'] ||
document['msPointerLockElement'] === Module['canvas'];
}
var canvas = Module['canvas'];
if (canvas) {
// forced aspect ratio can be enabled by defining 'forcedAspectRatio' on Module
// Module['forcedAspectRatio'] = 4 / 3;
canvas.requestPointerLock = canvas['requestPointerLock'] ||
canvas['mozRequestPointerLock'] ||
canvas['webkitRequestPointerLock'] ||
canvas['msRequestPointerLock'] ||
(() => {});
canvas.exitPointerLock = document['exitPointerLock'] ||
document['mozExitPointerLock'] ||
document['webkitExitPointerLock'] ||
document['msExitPointerLock'] ||
(() => {}); // no-op if function does not exist
canvas.exitPointerLock = canvas.exitPointerLock.bind(document);
document.addEventListener('pointerlockchange', pointerLockChange, false);
document.addEventListener('mozpointerlockchange', pointerLockChange, false);
document.addEventListener('webkitpointerlockchange', pointerLockChange, false);
document.addEventListener('mspointerlockchange', pointerLockChange, false);
if (Module['elementPointerLock']) {
canvas.addEventListener("click", (ev) => {
if (!Browser.pointerLock && Module['canvas'].requestPointerLock) {
Module['canvas'].requestPointerLock();
ev.preventDefault();
}
}, false);
}
}
},
createContext(/** @type {HTMLCanvasElement} */ canvas, useWebGL, setInModule, webGLContextAttributes) {
if (useWebGL && Module.ctx && canvas == Module.canvas) return Module.ctx; // no need to recreate GL context if it's already been created for this canvas.
var ctx;
var contextHandle;
if (useWebGL) {
// For GLES2/desktop GL compatibility, adjust a few defaults to be different to WebGL defaults, so that they align better with the desktop defaults.
var contextAttributes = {
antialias: false,
alpha: false,
#if MIN_WEBGL_VERSION >= 2
majorVersion: 2,
#elif MAX_WEBGL_VERSION >= 2 // library_browser.js defaults: use the WebGL version chosen at compile time (unless overridden below)
majorVersion: (typeof WebGL2RenderingContext != 'undefined') ? 2 : 1,
#else
majorVersion: 1,
#endif
};
if (webGLContextAttributes) {
for (var attribute in webGLContextAttributes) {
contextAttributes[attribute] = webGLContextAttributes[attribute];
}
}
// This check of existence of GL is here to satisfy Closure compiler, which yells if variable GL is referenced below but GL object is not
// actually compiled in because application is not doing any GL operations. TODO: Ideally if GL is not being used, this function
// Browser.createContext() should not even be emitted.
if (typeof GL != 'undefined') {
contextHandle = GL.createContext(canvas, contextAttributes);
if (contextHandle) {
ctx = GL.getContext(contextHandle).GLctx;
}
}
} else {
ctx = canvas.getContext('2d');
}
if (!ctx) return null;
if (setInModule) {
#if ASSERTIONS
if (!useWebGL) assert(typeof GLctx == 'undefined', 'cannot set in module if GLctx is used, but we are a non-GL context that would replace it');
#endif
Module.ctx = ctx;
if (useWebGL) GL.makeContextCurrent(contextHandle);
Module.useWebGL = useWebGL;
Browser.moduleContextCreatedCallbacks.forEach((callback) => callback());
Browser.init();
}
return ctx;
},
destroyContext(canvas, useWebGL, setInModule) {},
fullscreenHandlersInstalled: false,
lockPointer: undefined,
resizeCanvas: undefined,
requestFullscreen(lockPointer, resizeCanvas) {
Browser.lockPointer = lockPointer;
Browser.resizeCanvas = resizeCanvas;
if (typeof Browser.lockPointer == 'undefined') Browser.lockPointer = true;
if (typeof Browser.resizeCanvas == 'undefined') Browser.resizeCanvas = false;
var canvas = Module['canvas'];
function fullscreenChange() {
Browser.isFullscreen = false;
var canvasContainer = canvas.parentNode;
if ((document['fullscreenElement'] || document['mozFullScreenElement'] ||
document['msFullscreenElement'] || document['webkitFullscreenElement'] ||
document['webkitCurrentFullScreenElement']) === canvasContainer) {
canvas.exitFullscreen = Browser.exitFullscreen;
if (Browser.lockPointer) canvas.requestPointerLock();
Browser.isFullscreen = true;
if (Browser.resizeCanvas) {
Browser.setFullscreenCanvasSize();
} else {
Browser.updateCanvasDimensions(canvas);
}
} else {
// remove the full screen specific parent of the canvas again to restore the HTML structure from before going full screen
canvasContainer.parentNode.insertBefore(canvas, canvasContainer);
canvasContainer.parentNode.removeChild(canvasContainer);
if (Browser.resizeCanvas) {
Browser.setWindowedCanvasSize();
} else {
Browser.updateCanvasDimensions(canvas);
}
}
Module['onFullScreen']?.(Browser.isFullscreen);
Module['onFullscreen']?.(Browser.isFullscreen);
}
if (!Browser.fullscreenHandlersInstalled) {
Browser.fullscreenHandlersInstalled = true;
document.addEventListener('fullscreenchange', fullscreenChange, false);
document.addEventListener('mozfullscreenchange', fullscreenChange, false);
document.addEventListener('webkitfullscreenchange', fullscreenChange, false);
document.addEventListener('MSFullscreenChange', fullscreenChange, false);
}
// create a new parent to ensure the canvas has no siblings. this allows browsers to optimize full screen performance when its parent is the full screen root
var canvasContainer = document.createElement("div");
canvas.parentNode.insertBefore(canvasContainer, canvas);
canvasContainer.appendChild(canvas);
// use parent of canvas as full screen root to allow aspect ratio correction (Firefox stretches the root to screen size)
canvasContainer.requestFullscreen = canvasContainer['requestFullscreen'] ||
canvasContainer['mozRequestFullScreen'] ||
canvasContainer['msRequestFullscreen'] ||
(canvasContainer['webkitRequestFullscreen'] ? () => canvasContainer['webkitRequestFullscreen'](Element['ALLOW_KEYBOARD_INPUT']) : null) ||
(canvasContainer['webkitRequestFullScreen'] ? () => canvasContainer['webkitRequestFullScreen'](Element['ALLOW_KEYBOARD_INPUT']) : null);
canvasContainer.requestFullscreen();
},
#if ASSERTIONS
requestFullScreen() {
abort('Module.requestFullScreen has been replaced by Module.requestFullscreen (without a capital S)');
},
#endif
exitFullscreen() {
// This is workaround for chrome. Trying to exit from fullscreen
// not in fullscreen state will cause "TypeError: Document not active"
// in chrome. See https://github.com/emscripten-core/emscripten/pull/8236
if (!Browser.isFullscreen) {
return false;
}
var CFS = document['exitFullscreen'] ||
document['cancelFullScreen'] ||
document['mozCancelFullScreen'] ||
document['msExitFullscreen'] ||
document['webkitCancelFullScreen'] ||
(() => {});
CFS.apply(document, []);
return true;
},
nextRAF: 0,
fakeRequestAnimationFrame(func) {
// try to keep 60fps between calls to here
var now = Date.now();
if (Browser.nextRAF === 0) {
Browser.nextRAF = now + 1000/60;
} else {
while (now + 2 >= Browser.nextRAF) { // fudge a little, to avoid timer jitter causing us to do lots of delay:0
Browser.nextRAF += 1000/60;
}
}
var delay = Math.max(Browser.nextRAF - now, 0);
setTimeout(func, delay);
},
requestAnimationFrame(func) {
if (typeof requestAnimationFrame == 'function') {
requestAnimationFrame(func);
return;
}
var RAF = Browser.fakeRequestAnimationFrame;
#if LEGACY_VM_SUPPORT
if (typeof window != 'undefined') {
RAF = window['requestAnimationFrame'] ||
window['mozRequestAnimationFrame'] ||
window['webkitRequestAnimationFrame'] ||
window['msRequestAnimationFrame'] ||
window['oRequestAnimationFrame'] ||
RAF;
}
#endif
RAF(func);
},
// abort and pause-aware versions TODO: build main loop on top of this?
safeSetTimeout(func, timeout) {
// Legacy function, this is used by the SDL2 port so we need to keep it
// around at least until that is updated.
// See https://github.com/libsdl-org/SDL/pull/6304
return safeSetTimeout(func, timeout);
},
safeRequestAnimationFrame(func) {
{{{ runtimeKeepalivePush() }}}
return Browser.requestAnimationFrame(() => {
{{{ runtimeKeepalivePop() }}}
callUserCallback(func);
});
},
getMimetype(name) {
return {
'jpg': 'image/jpeg',
'jpeg': 'image/jpeg',
'png': 'image/png',
'bmp': 'image/bmp',
'ogg': 'audio/ogg',
'wav': 'audio/wav',
'mp3': 'audio/mpeg'
}[name.substr(name.lastIndexOf('.')+1)];
},
getUserMedia(func) {
window.getUserMedia ||= navigator['getUserMedia'] ||
navigator['mozGetUserMedia'];
window.getUserMedia(func);
},
getMovementX(event) {
return event['movementX'] ||
event['mozMovementX'] ||
event['webkitMovementX'] ||
0;
},
getMovementY(event) {
return event['movementY'] ||
event['mozMovementY'] ||
event['webkitMovementY'] ||
0;
},
// Browsers specify wheel direction according to the page CSS pixel Y direction:
// Scrolling mouse wheel down (==towards user/away from screen) on Windows/Linux (and macOS without 'natural scroll' enabled)
// is the positive wheel direction. Scrolling mouse wheel up (towards the screen) is the negative wheel direction.
// This function returns the wheel direction in the browser page coordinate system (+: down, -: up). Note that this is often the
// opposite of native code: In native APIs the positive scroll direction is to scroll up (away from the user).
// NOTE: The mouse wheel delta is a decimal number, and can be a fractional value within -1 and 1. If you need to represent
// this as an integer, don't simply cast to int, or you may receive scroll events for wheel delta == 0.
// NOTE: We convert all units returned by events into steps, i.e. individual wheel notches.
// These conversions are only approximations. Changing browsers, operating systems, or even settings can change the values.
getMouseWheelDelta(event) {
var delta = 0;
switch (event.type) {
case 'DOMMouseScroll':
// 3 lines make up a step
delta = event.detail / 3;
break;
case 'mousewheel':
// 120 units make up a step
delta = event.wheelDelta / 120;
break;
case 'wheel':
delta = event.deltaY
switch (event.deltaMode) {
case 0:
// DOM_DELTA_PIXEL: 100 pixels make up a step
delta /= 100;
break;
case 1:
// DOM_DELTA_LINE: 3 lines make up a step
delta /= 3;
break;
case 2:
// DOM_DELTA_PAGE: A page makes up 80 steps
delta *= 80;
break;
default:
throw 'unrecognized mouse wheel delta mode: ' + event.deltaMode;
}
break;
default:
throw 'unrecognized mouse wheel event: ' + event.type;
}
return delta;
},
mouseX: 0,
mouseY: 0,
mouseMovementX: 0,
mouseMovementY: 0,
touches: {},
lastTouches: {},
// Return the mouse coordinates relative to the top, left of the canvas, corrected for scroll offset.
calculateMouseCoords(pageX, pageY) {
// Calculate the movement based on the changes
// in the coordinates.
var rect = Module["canvas"].getBoundingClientRect();
var cw = Module["canvas"].width;
var ch = Module["canvas"].height;
// Neither .scrollX or .pageXOffset are defined in a spec, but
// we prefer .scrollX because it is currently in a spec draft.
// (see: http://www.w3.org/TR/2013/WD-cssom-view-20131217/)
var scrollX = ((typeof window.scrollX != 'undefined') ? window.scrollX : window.pageXOffset);
var scrollY = ((typeof window.scrollY != 'undefined') ? window.scrollY : window.pageYOffset);
#if ASSERTIONS
// If this assert lands, it's likely because the browser doesn't support scrollX or pageXOffset
// and we have no viable fallback.
assert((typeof scrollX != 'undefined') && (typeof scrollY != 'undefined'), 'Unable to retrieve scroll position, mouse positions likely broken.');
#endif
var adjustedX = pageX - (scrollX + rect.left);
var adjustedY = pageY - (scrollY + rect.top);
// the canvas might be CSS-scaled compared to its backbuffer;
// SDL-using content will want mouse coordinates in terms
// of backbuffer units.
adjustedX = adjustedX * (cw / rect.width);
adjustedY = adjustedY * (ch / rect.height);
return { x: adjustedX, y: adjustedY };
},
// Directly set the Browser state with new mouse coordinates calculated using calculateMouseCoords.
setMouseCoords(pageX, pageY) {
const {x, y} = Browser.calculateMouseCoords(pageX, pageY);
Browser.mouseMovementX = x - Browser.mouseX;
Browser.mouseMovementY = y - Browser.mouseY;
Browser.mouseX = x;
Browser.mouseY = y;
},
// Unpack a "mouse" event, handling SDL touch paths and pointerlock compatibility stuff.
calculateMouseEvent(event) { // event should be mousemove, mousedown or mouseup
if (Browser.pointerLock) {
// When the pointer is locked, calculate the coordinates
// based on the movement of the mouse.
// Workaround for Firefox bug 764498
if (event.type != 'mousemove' &&
('mozMovementX' in event)) {
Browser.mouseMovementX = Browser.mouseMovementY = 0;
} else {
Browser.mouseMovementX = Browser.getMovementX(event);
Browser.mouseMovementY = Browser.getMovementY(event);
}
// add the mouse delta to the current absolute mouse position
Browser.mouseX += Browser.mouseMovementX;
Browser.mouseY += Browser.mouseMovementY;
} else {
if (event.type === 'touchstart' || event.type === 'touchend' || event.type === 'touchmove') {
var touch = event.touch;
if (touch === undefined) {
return; // the "touch" property is only defined in SDL
}
var coords = Browser.calculateMouseCoords(touch.pageX, touch.pageY);
if (event.type === 'touchstart') {
Browser.lastTouches[touch.identifier] = coords;
Browser.touches[touch.identifier] = coords;
} else if (event.type === 'touchend' || event.type === 'touchmove') {
var last = Browser.touches[touch.identifier];
last ||= coords;
Browser.lastTouches[touch.identifier] = last;
Browser.touches[touch.identifier] = coords;
}
return;
}
Browser.setMouseCoords(event.pageX, event.pageY);
}
},
resizeListeners: [],
updateResizeListeners() {
var canvas = Module['canvas'];
Browser.resizeListeners.forEach((listener) => listener(canvas.width, canvas.height));
},
setCanvasSize(width, height, noUpdates) {
var canvas = Module['canvas'];
Browser.updateCanvasDimensions(canvas, width, height);
if (!noUpdates) Browser.updateResizeListeners();
},
windowedWidth: 0,
windowedHeight: 0,
setFullscreenCanvasSize() {
// check if SDL is available
if (typeof SDL != "undefined") {
var flags = {{{ makeGetValue('SDL.screen', '0', 'u32') }}};
flags = flags | 0x00800000; // set SDL_FULLSCREEN flag
{{{ makeSetValue('SDL.screen', '0', 'flags', 'i32') }}};
}
Browser.updateCanvasDimensions(Module['canvas']);
Browser.updateResizeListeners();
},
setWindowedCanvasSize() {
// check if SDL is available
if (typeof SDL != "undefined") {
var flags = {{{ makeGetValue('SDL.screen', '0', 'u32') }}};
flags = flags & ~0x00800000; // clear SDL_FULLSCREEN flag
{{{ makeSetValue('SDL.screen', '0', 'flags', 'i32') }}};
}
Browser.updateCanvasDimensions(Module['canvas']);
Browser.updateResizeListeners();
},
updateCanvasDimensions(canvas, wNative, hNative) {
if (wNative && hNative) {
canvas.widthNative = wNative;
canvas.heightNative = hNative;
} else {
wNative = canvas.widthNative;
hNative = canvas.heightNative;
}
var w = wNative;
var h = hNative;
if (Module['forcedAspectRatio'] && Module['forcedAspectRatio'] > 0) {
if (w/h < Module['forcedAspectRatio']) {
w = Math.round(h * Module['forcedAspectRatio']);
} else {
h = Math.round(w / Module['forcedAspectRatio']);
}
}
if (((document['fullscreenElement'] || document['mozFullScreenElement'] ||
document['msFullscreenElement'] || document['webkitFullscreenElement'] ||
document['webkitCurrentFullScreenElement']) === canvas.parentNode) && (typeof screen != 'undefined')) {
var factor = Math.min(screen.width / w, screen.height / h);
w = Math.round(w * factor);
h = Math.round(h * factor);
}
if (Browser.resizeCanvas) {
if (canvas.width != w) canvas.width = w;
if (canvas.height != h) canvas.height = h;
if (typeof canvas.style != 'undefined') {
canvas.style.removeProperty( "width");
canvas.style.removeProperty("height");
}
} else {
if (canvas.width != wNative) canvas.width = wNative;
if (canvas.height != hNative) canvas.height = hNative;
if (typeof canvas.style != 'undefined') {
if (w != wNative || h != hNative) {
canvas.style.setProperty( "width", w + "px", "important");
canvas.style.setProperty("height", h + "px", "important");
} else {
canvas.style.removeProperty( "width");
canvas.style.removeProperty("height");
}
}
}
},
},
emscripten_run_preload_plugins__deps: ['$PATH'],
emscripten_run_preload_plugins__proxy: 'sync',
emscripten_run_preload_plugins: (file, onload, onerror) => {
{{{ runtimeKeepalivePush() }}}
var _file = UTF8ToString(file);
var data = FS.analyzePath(_file);
if (!data.exists) return -1;
FS.createPreloadedFile(
PATH.dirname(_file),
PATH.basename(_file),
// TODO: This copy is not needed if the contents are already a Uint8Array,
// which they often are (and always are in WasmFS).
new Uint8Array(data.object.contents), true, true,
() => {
{{{ runtimeKeepalivePop() }}}
if (onload) {{{ makeDynCall('vp', 'onload') }}}(file);
},
() => {
{{{ runtimeKeepalivePop() }}}
if (onerror) {{{ makeDynCall('vp', 'onerror') }}}(file);
},
true // don'tCreateFile - it's already there
);
return 0;
},
$Browser_asyncPrepareDataCounter: 0,
emscripten_run_preload_plugins_data__proxy: 'sync',
emscripten_run_preload_plugins_data__deps: ['$stringToNewUTF8', '$Browser_asyncPrepareDataCounter'],
emscripten_run_preload_plugins_data: (data, size, suffix, arg, onload, onerror) => {
{{{ runtimeKeepalivePush() }}}
var _suffix = UTF8ToString(suffix);
var name = 'prepare_data_' + (Browser_asyncPrepareDataCounter++) + '.' + _suffix;
var cname = stringToNewUTF8(name);
FS.createPreloadedFile(
'/',
name,
{{{ makeHEAPView('U8', 'data', 'data + size') }}},
true, true,
() => {
{{{ runtimeKeepalivePop() }}}
if (onload) {{{ makeDynCall('vpp', 'onload') }}}(arg, cname);
},
() => {
{{{ runtimeKeepalivePop() }}}
if (onerror) {{{ makeDynCall('vp', 'onerror') }}}(arg);
},
true // don'tCreateFile - it's already there
);
},
// Callable from pthread, executes in pthread context.
emscripten_async_run_script__deps: ['emscripten_run_script', '$safeSetTimeout'],
emscripten_async_run_script: (script, millis) => {
// TODO: cache these to avoid generating garbage
safeSetTimeout(() => _emscripten_run_script(script), millis);
},
// TODO: currently not callable from a pthread, but immediately calls onerror() if not on main thread.
emscripten_async_load_script__deps: ['$UTF8ToString'],
emscripten_async_load_script: (url, onload, onerror) => {
url = UTF8ToString(url);
onload = {{{ makeDynCall('v', 'onload') }}};
onerror = {{{ makeDynCall('v', 'onerror') }}};
#if PTHREADS
if (ENVIRONMENT_IS_PTHREAD) {
err(`emscripten_async_load_script("${url}") failed, emscripten_async_load_script is currently not available in pthreads!`);
return onerror ? onerror() : undefined;
}
#endif
#if ASSERTIONS
assert(runDependencies === 0, 'async_load_script must be run when no other dependencies are active');
#endif
{{{ runtimeKeepalivePush() }}}
var loadDone = () => {
{{{ runtimeKeepalivePop() }}}
if (onload) {
if (runDependencies > 0) {
dependenciesFulfilled = onload;
} else {
onload();
}
}
}
var loadError = () => {
{{{ runtimeKeepalivePop() }}}
onerror?.();
};
#if ENVIRONMENT_MAY_BE_NODE && DYNAMIC_EXECUTION
if (ENVIRONMENT_IS_NODE) {
readAsync(url, (data) => {
eval(data);
loadDone();
}, loadError, false);
return;
}
#endif
var script = document.createElement('script');
script.onload = loadDone;
script.onerror = loadError;
script.src = url;
document.body.appendChild(script);
},
// Runs natively in pthread, no __proxy needed.
emscripten_get_main_loop_timing: (mode, value) => {
if (mode) {{{ makeSetValue('mode', 0, 'Browser.mainLoop.timingMode', 'i32') }}};
if (value) {{{ makeSetValue('value', 0, 'Browser.mainLoop.timingValue', 'i32') }}};
},
// Runs natively in pthread, no __proxy needed.
emscripten_set_main_loop_timing: (mode, value) => {
Browser.mainLoop.timingMode = mode;
Browser.mainLoop.timingValue = value;
if (!Browser.mainLoop.func) {
#if ASSERTIONS
err('emscripten_set_main_loop_timing: Cannot set timing mode for main loop since a main loop does not exist! Call emscripten_set_main_loop first to set one up.');
#endif
return 1; // Return non-zero on failure, can't set timing mode when there is no main loop.
}
if (!Browser.mainLoop.running) {
{{{ runtimeKeepalivePush() }}}
Browser.mainLoop.running = true;
}
if (mode == {{{ cDefs.EM_TIMING_SETTIMEOUT }}}) {
Browser.mainLoop.scheduler = function Browser_mainLoop_scheduler_setTimeout() {
var timeUntilNextTick = Math.max(0, Browser.mainLoop.tickStartTime + value - _emscripten_get_now())|0;
setTimeout(Browser.mainLoop.runner, timeUntilNextTick); // doing this each time means that on exception, we stop
};
Browser.mainLoop.method = 'timeout';
} else if (mode == {{{ cDefs.EM_TIMING_RAF }}}) {
Browser.mainLoop.scheduler = function Browser_mainLoop_scheduler_rAF() {
Browser.requestAnimationFrame(Browser.mainLoop.runner);
};
Browser.mainLoop.method = 'rAF';
} else if (mode == {{{ cDefs.EM_TIMING_SETIMMEDIATE}}}) {
if (typeof Browser.setImmediate == 'undefined') {
if (typeof setImmediate == 'undefined') {
// Emulate setImmediate. (note: not a complete polyfill, we don't emulate clearImmediate() to keep code size to minimum, since not needed)
var setImmediates = [];
var emscriptenMainLoopMessageId = 'setimmediate';
/** @param {Event} event */
var Browser_setImmediate_messageHandler = (event) => {
// When called in current thread or Worker, the main loop ID is structured slightly different to accommodate for --proxy-to-worker runtime listening to Worker events,
// so check for both cases.
if (event.data === emscriptenMainLoopMessageId || event.data.target === emscriptenMainLoopMessageId) {
event.stopPropagation();
setImmediates.shift()();
}
};
addEventListener("message", Browser_setImmediate_messageHandler, true);
Browser.setImmediate = /** @type{function(function(): ?, ...?): number} */(function Browser_emulated_setImmediate(func) {
setImmediates.push(func);
if (ENVIRONMENT_IS_WORKER) {
if (Module['setImmediates'] === undefined) Module['setImmediates'] = [];
Module['setImmediates'].push(func);
postMessage({target: emscriptenMainLoopMessageId}); // In --proxy-to-worker, route the message via proxyClient.js
} else postMessage(emscriptenMainLoopMessageId, "*"); // On the main thread, can just send the message to itself.
});
} else {
Browser.setImmediate = setImmediate;
}
}
Browser.mainLoop.scheduler = function Browser_mainLoop_scheduler_setImmediate() {
Browser.setImmediate(Browser.mainLoop.runner);
};
Browser.mainLoop.method = 'immediate';
}
return 0;
},
emscripten_set_main_loop__deps: ['$setMainLoop'],
emscripten_set_main_loop: (func, fps, simulateInfiniteLoop) => {
var browserIterationFunc = {{{ makeDynCall('v', 'func') }}};
setMainLoop(browserIterationFunc, fps, simulateInfiniteLoop);
},
// Runs natively in pthread, no __proxy needed.
$setMainLoop__deps: [
'emscripten_set_main_loop_timing', 'emscripten_get_now',
#if OFFSCREEN_FRAMEBUFFER
'emscripten_webgl_commit_frame',
#endif
#if EXIT_RUNTIME && !MINIMAL_RUNTIME
'$maybeExit',
#endif
],
$setMainLoop__docs: `
/**
* @param {number=} arg
* @param {boolean=} noSetTiming
*/`,
$setMainLoop: (browserIterationFunc, fps, simulateInfiniteLoop, arg, noSetTiming) => {
#if ASSERTIONS
assert(!Browser.mainLoop.func, 'emscripten_set_main_loop: there can only be one main loop function at once: call emscripten_cancel_main_loop to cancel the previous one before setting a new one with different parameters.');
#endif
Browser.mainLoop.func = browserIterationFunc;
Browser.mainLoop.arg = arg;
#if MAYBE_CLOSURE_COMPILER
// Closure compiler bug(?): Closure does not see that the assignment
// var thisMainLoopId = Browser.mainLoop.currentlyRunningMainloop
// is a value copy of a number (even with the JSDoc @type annotation)
// but optimizeis the code as if the assignment was a reference assignment,
// which results in Browser.mainLoop.pause() not working. Hence use a
// workaround to make Closure believe this is a value copy that should occur:
// (TODO: Minimize this down to a small test case and report - was unable
// to reproduce in a small written test case)
/** @type{number} */
var thisMainLoopId = (() => Browser.mainLoop.currentlyRunningMainloop)();
#else
var thisMainLoopId = Browser.mainLoop.currentlyRunningMainloop;
#endif
function checkIsRunning() {
if (thisMainLoopId < Browser.mainLoop.currentlyRunningMainloop) {
#if RUNTIME_DEBUG
dbg('main loop exiting..');
#endif
{{{ runtimeKeepalivePop() }}}
#if EXIT_RUNTIME && !MINIMAL_RUNTIME
maybeExit();
#endif
return false;
}
return true;
}
// We create the loop runner here but it is not actually running until
// _emscripten_set_main_loop_timing is called (which might happen a
// later time). This member signifies that the current runner has not
// yet been started so that we can call runtimeKeepalivePush when it
// gets it timing set for the first time.
Browser.mainLoop.running = false;
Browser.mainLoop.runner = function Browser_mainLoop_runner() {
if (ABORT) return;
if (Browser.mainLoop.queue.length > 0) {
var start = Date.now();
var blocker = Browser.mainLoop.queue.shift();
blocker.func(blocker.arg);
if (Browser.mainLoop.remainingBlockers) {
var remaining = Browser.mainLoop.remainingBlockers;
var next = remaining%1 == 0 ? remaining-1 : Math.floor(remaining);
if (blocker.counted) {
Browser.mainLoop.remainingBlockers = next;
} else {
// not counted, but move the progress along a tiny bit
next = next + 0.5; // do not steal all the next one's progress
Browser.mainLoop.remainingBlockers = (8*remaining + next)/9;
}
}
#if RUNTIME_DEBUG
dbg(`main loop blocker "${blocker.name}" took '${Date.now() - start} ms`); //, left: ' + Browser.mainLoop.remainingBlockers);
#endif
Browser.mainLoop.updateStatus();
// catches pause/resume main loop from blocker execution
if (!checkIsRunning()) return;
setTimeout(Browser.mainLoop.runner, 0);
return;
}
// catch pauses from non-main loop sources
if (!checkIsRunning()) return;
// Implement very basic swap interval control
Browser.mainLoop.currentFrameNumber = Browser.mainLoop.currentFrameNumber + 1 | 0;
if (Browser.mainLoop.timingMode == {{{ cDefs.EM_TIMING_RAF }}} && Browser.mainLoop.timingValue > 1 && Browser.mainLoop.currentFrameNumber % Browser.mainLoop.timingValue != 0) {
// Not the scheduled time to render this frame - skip.
Browser.mainLoop.scheduler();
return;
} else if (Browser.mainLoop.timingMode == {{{ cDefs.EM_TIMING_SETTIMEOUT }}}) {
Browser.mainLoop.tickStartTime = _emscripten_get_now();
}
// Signal GL rendering layer that processing of a new frame is about to start. This helps it optimize
// VBO double-buffering and reduce GPU stalls.
#if FULL_ES2 || LEGACY_GL_EMULATION
GL.newRenderingFrameStarted();
#endif
#if PTHREADS && OFFSCREEN_FRAMEBUFFER && GL_SUPPORT_EXPLICIT_SWAP_CONTROL
// If the current GL context is a proxied regular WebGL context, and was initialized with implicit swap mode on the main thread, and we are on the parent thread,