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library_browser.js
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//"use strict";
// Utilities for browser environments
mergeInto(LibraryManager.library, {
$Browser__deps: ['$PATH'],
$Browser__postset: 'Module["requestFullScreen"] = function Module_requestFullScreen(lockPointer, resizeCanvas) { Browser.requestFullScreen(lockPointer, resizeCanvas) };\n' + // exports
'Module["requestAnimationFrame"] = function Module_requestAnimationFrame(func) { Browser.requestAnimationFrame(func) };\n' +
'Module["setCanvasSize"] = function Module_setCanvasSize(width, height, noUpdates) { Browser.setCanvasSize(width, height, noUpdates) };\n' +
'Module["pauseMainLoop"] = function Module_pauseMainLoop() { Browser.mainLoop.pause() };\n' +
'Module["resumeMainLoop"] = function Module_resumeMainLoop() { Browser.mainLoop.resume() };\n' +
'Module["getUserMedia"] = function Module_getUserMedia() { Browser.getUserMedia() }',
$Browser: {
mainLoop: {
scheduler: null,
method: '',
shouldPause: false,
paused: false,
queue: [],
pause: function() {
Browser.mainLoop.shouldPause = true;
},
resume: function() {
if (Browser.mainLoop.paused) {
Browser.mainLoop.paused = false;
Browser.mainLoop.scheduler();
}
Browser.mainLoop.shouldPause = false;
},
updateStatus: function() {
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']('');
}
}
}
},
isFullScreen: false,
pointerLock: false,
moduleContextCreatedCallbacks: [],
workers: [],
init: function() {
if (!Module["preloadPlugins"]) Module["preloadPlugins"] = []; // needs to exist even in workers
if (Browser.initted || ENVIRONMENT_IS_WORKER) return;
Browser.initted = true;
try {
new Blob();
Browser.hasBlobConstructor = true;
} catch(e) {
Browser.hasBlobConstructor = false;
console.log("warning: no blob constructor, cannot create blobs with mimetypes");
}
Browser.BlobBuilder = typeof MozBlobBuilder != "undefined" ? MozBlobBuilder : (typeof WebKitBlobBuilder != "undefined" ? WebKitBlobBuilder : (!Browser.hasBlobConstructor ? console.log("warning: no BlobBuilder") : null));
Browser.URLObject = typeof window != "undefined" ? (window.URL ? window.URL : window.webkitURL) : undefined;
if (!Module.noImageDecoding && typeof Browser.URLObject === 'undefined') {
console.log("warning: Browser does not support creating object URLs. Built-in browser image decoding will not be available.");
Module.noImageDecoding = true;
}
// Support for plugins that can process preloaded files. You can add more of these to
// your app by creating and appending to Module.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 = null;
if (Browser.hasBlobConstructor) {
try {
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) });
}
} catch(e) {
Runtime.warnOnce('Blob constructor present but fails: ' + e + '; falling back to blob builder');
}
}
if (!b) {
var bb = new Browser.BlobBuilder();
bb.append((new Uint8Array(byteArray)).buffer); // we need to pass a buffer, and must copy the array to get the right data range
b = bb.getBlob();
}
var url = Browser.URLObject.createObjectURL(b);
#if ASSERTIONS
assert(typeof url == 'string', 'createObjectURL must return a url as a string');
#endif
var img = new Image();
img.onload = function img_onload() {
assert(img.complete, 'Image ' + name + ' could not be decoded');
var canvas = document.createElement('canvas');
canvas.width = img.width;
canvas.height = img.height;
var ctx = canvas.getContext('2d');
ctx.drawImage(img, 0, 0);
Module["preloadedImages"][name] = canvas;
Browser.URLObject.revokeObjectURL(url);
if (onload) onload(byteArray);
};
img.onerror = function img_onerror(event) {
console.log('Image ' + url + ' could not be decoded');
if (onerror) onerror();
};
img.src = url;
};
Module['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;
Module["preloadedAudios"][name] = audio;
if (onload) onload(byteArray);
}
function fail() {
if (done) return;
done = true;
Module["preloadedAudios"][name] = new Audio(); // empty shim
if (onerror) onerror();
}
if (Browser.hasBlobConstructor) {
try {
var b = new Blob([byteArray], { type: Browser.getMimetype(name) });
} catch(e) {
return fail();
}
var url = Browser.URLObject.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', function() { finish(audio) }, false); // use addEventListener due to chromium bug 124926
audio.onerror = function audio_onerror(event) {
if (done) return;
console.log('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
Browser.safeSetTimeout(function() {
finish(audio); // try to use it even though it is not necessarily ready to play
}, 10000);
} else {
return fail();
}
};
Module['preloadPlugins'].push(audioPlugin);
// Canvas event setup
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'] ||
function(){};
canvas.exitPointerLock = document['exitPointerLock'] ||
document['mozExitPointerLock'] ||
document['webkitExitPointerLock'] ||
document['msExitPointerLock'] ||
function(){}; // no-op if function does not exist
canvas.exitPointerLock = canvas.exitPointerLock.bind(document);
function pointerLockChange() {
Browser.pointerLock = document['pointerLockElement'] === canvas ||
document['mozPointerLockElement'] === canvas ||
document['webkitPointerLockElement'] === canvas ||
document['msPointerLockElement'] === canvas;
}
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", function(ev) {
if (!Browser.pointerLock && canvas.requestPointerLock) {
canvas.requestPointerLock();
ev.preventDefault();
}
}, false);
}
}
},
createContext: function(canvas, useWebGL, setInModule, webGLContextAttributes) {
#if !USE_TYPED_ARRAYS
if (useWebGL) {
Module.print('(USE_TYPED_ARRAYS needs to be enabled for WebGL)');
return null;
}
#endif
var ctx;
var errorInfo = '?';
function onContextCreationError(event) {
errorInfo = event.statusMessage || errorInfo;
}
try {
if (useWebGL) {
var contextAttributes = {
antialias: false,
alpha: false
};
if (webGLContextAttributes) {
for (var attribute in webGLContextAttributes) {
contextAttributes[attribute] = webGLContextAttributes[attribute];
}
}
#if GL_TESTING
contextAttributes.preserveDrawingBuffer = true;
#endif
canvas.addEventListener('webglcontextcreationerror', onContextCreationError, false);
try {
['experimental-webgl', 'webgl'].some(function(webglId) {
return ctx = canvas.getContext(webglId, contextAttributes);
});
} finally {
canvas.removeEventListener('webglcontextcreationerror', onContextCreationError, false);
}
} else {
ctx = canvas.getContext('2d');
}
if (!ctx) throw ':(';
} catch (e) {
Module.print('Could not create canvas: ' + [errorInfo, e]);
return null;
}
if (useWebGL) {
#if GL_DEBUG
// Useful to debug native webgl apps: var Module = { printErr: function(x) { console.log(x) } };
var tempCtx = ctx;
var wrapper = {};
for (var prop in tempCtx) {
(function(prop) {
switch (typeof tempCtx[prop]) {
case 'function': {
wrapper[prop] = function gl_wrapper() {
if (GL.debug) {
var printArgs = Array.prototype.slice.call(arguments).map(Runtime.prettyPrint);
Module.printErr('[gl_f:' + prop + ':' + printArgs + ']');
}
var ret = tempCtx[prop].apply(tempCtx, arguments);
if (GL.debug && typeof ret != 'undefined') {
Module.printErr('[ gl:' + prop + ':return:' + Runtime.prettyPrint(ret) + ']');
}
return ret;
}
break;
}
case 'number': case 'string': {
wrapper.__defineGetter__(prop, function() {
//Module.printErr('[gl_g:' + prop + ':' + tempCtx[prop] + ']');
return tempCtx[prop];
});
wrapper.__defineSetter__(prop, function(value) {
if (GL.debug) {
Module.printErr('[gl_s:' + prop + ':' + value + ']');
}
tempCtx[prop] = value;
});
break;
}
}
})(prop);
}
ctx = wrapper;
#endif
// Set the background of the WebGL canvas to black
canvas.style.backgroundColor = "black";
}
if (setInModule) {
GLctx = Module.ctx = ctx;
Module.useWebGL = useWebGL;
Browser.moduleContextCreatedCallbacks.forEach(function(callback) { callback() });
Browser.init();
}
return ctx;
},
destroyContext: function(canvas, useWebGL, setInModule) {},
fullScreenHandlersInstalled: false,
lockPointer: undefined,
resizeCanvas: undefined,
requestFullScreen: function(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['webkitFullScreenElement'] || document['webkitFullscreenElement'] ||
document['mozFullScreenElement'] || document['mozFullscreenElement'] ||
document['fullScreenElement'] || document['fullscreenElement'] ||
document['msFullScreenElement'] || document['msFullscreenElement'] ||
document['webkitCurrentFullScreenElement']) === canvasContainer) {
canvas.cancelFullScreen = document['cancelFullScreen'] ||
document['mozCancelFullScreen'] ||
document['webkitCancelFullScreen'] ||
document['msExitFullscreen'] ||
document['exitFullscreen'] ||
function() {};
canvas.cancelFullScreen = canvas.cancelFullScreen.bind(document);
if (Browser.lockPointer) canvas.requestPointerLock();
Browser.isFullScreen = true;
if (Browser.resizeCanvas) Browser.setFullScreenCanvasSize();
} 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();
}
if (Module['onFullScreen']) Module['onFullScreen'](Browser.isFullScreen);
Browser.updateCanvasDimensions(canvas);
}
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'] ? function() { canvasContainer['webkitRequestFullScreen'](Element['ALLOW_KEYBOARD_INPUT']) } : null);
canvasContainer.requestFullScreen();
},
requestAnimationFrame: function requestAnimationFrame(func) {
if (typeof window === 'undefined') { // Provide fallback to setTimeout if window is undefined (e.g. in Node.js)
setTimeout(func, 1000/60);
} else {
if (!window.requestAnimationFrame) {
window.requestAnimationFrame = window['requestAnimationFrame'] ||
window['mozRequestAnimationFrame'] ||
window['webkitRequestAnimationFrame'] ||
window['msRequestAnimationFrame'] ||
window['oRequestAnimationFrame'] ||
window['setTimeout'];
}
window.requestAnimationFrame(func);
}
},
// generic abort-aware wrapper for an async callback
safeCallback: function(func) {
return function() {
if (!ABORT) return func.apply(null, arguments);
};
},
// abort-aware versions
safeRequestAnimationFrame: function(func) {
return Browser.requestAnimationFrame(function() {
if (!ABORT) func();
});
},
safeSetTimeout: function(func, timeout) {
Module['noExitRuntime'] = true;
return setTimeout(function() {
if (!ABORT) func();
}, timeout);
},
safeSetInterval: function(func, timeout) {
Module['noExitRuntime'] = true;
return setInterval(function() {
if (!ABORT) func();
}, timeout);
},
getMimetype: function(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: function(func) {
if(!window.getUserMedia) {
window.getUserMedia = navigator['getUserMedia'] ||
navigator['mozGetUserMedia'];
}
window.getUserMedia(func);
},
getMovementX: function(event) {
return event['movementX'] ||
event['mozMovementX'] ||
event['webkitMovementX'] ||
0;
},
getMovementY: function(event) {
return event['movementY'] ||
event['mozMovementY'] ||
event['webkitMovementY'] ||
0;
},
getMouseWheelDelta: function(event) {
var delta = 0;
switch (event.type) {
case 'DOMMouseScroll':
delta = event.detail;
break;
case 'mousewheel':
delta = -event.wheelDelta;
break;
case 'wheel':
delta = event.deltaY;
break;
default:
throw 'unrecognized mouse wheel event: ' + event.type;
}
return Math.max(-1, Math.min(1, delta));
},
mouseX: 0,
mouseY: 0,
mouseMovementX: 0,
mouseMovementY: 0,
touches: {},
lastTouches: {},
calculateMouseEvent: function(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);
}
// check if SDL is available
if (typeof SDL != "undefined") {
Browser.mouseX = SDL.mouseX + Browser.mouseMovementX;
Browser.mouseY = SDL.mouseY + Browser.mouseMovementY;
} else {
// just add the mouse delta to the current absolut mouse position
// FIXME: ideally this should be clamped against the canvas size and zero
Browser.mouseX += Browser.mouseMovementX;
Browser.mouseY += Browser.mouseMovementY;
}
} else {
// Otherwise, 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
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 adjustedX = touch.pageX - (scrollX + rect.left);
var adjustedY = touch.pageY - (scrollY + rect.top);
adjustedX = adjustedX * (cw / rect.width);
adjustedY = adjustedY * (ch / rect.height);
var coords = { x: adjustedX, y: adjustedY };
if (event.type === 'touchstart') {
Browser.lastTouches[touch.identifier] = coords;
Browser.touches[touch.identifier] = coords;
} else if (event.type === 'touchend' || event.type === 'touchmove') {
Browser.lastTouches[touch.identifier] = Browser.touches[touch.identifier];
Browser.touches[touch.identifier] = { x: adjustedX, y: adjustedY };
}
return;
}
var x = event.pageX - (scrollX + rect.left);
var y = event.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.
x = x * (cw / rect.width);
y = y * (ch / rect.height);
Browser.mouseMovementX = x - Browser.mouseX;
Browser.mouseMovementY = y - Browser.mouseY;
Browser.mouseX = x;
Browser.mouseY = y;
}
},
xhrLoad: function(url, onload, onerror) {
var xhr = new XMLHttpRequest();
xhr.open('GET', url, true);
xhr.responseType = 'arraybuffer';
xhr.onload = function xhr_onload() {
if (xhr.status == 200 || (xhr.status == 0 && xhr.response)) { // file URLs can return 0
onload(xhr.response);
} else {
onerror();
}
};
xhr.onerror = onerror;
xhr.send(null);
},
asyncLoad: function(url, onload, onerror, noRunDep) {
Browser.xhrLoad(url, function(arrayBuffer) {
assert(arrayBuffer, 'Loading data file "' + url + '" failed (no arrayBuffer).');
onload(new Uint8Array(arrayBuffer));
if (!noRunDep) removeRunDependency('al ' + url);
}, function(event) {
if (onerror) {
onerror();
} else {
throw 'Loading data file "' + url + '" failed.';
}
});
if (!noRunDep) addRunDependency('al ' + url);
},
resizeListeners: [],
updateResizeListeners: function() {
var canvas = Module['canvas'];
Browser.resizeListeners.forEach(function(listener) {
listener(canvas.width, canvas.height);
});
},
setCanvasSize: function(width, height, noUpdates) {
var canvas = Module['canvas'];
Browser.updateCanvasDimensions(canvas, width, height);
if (!noUpdates) Browser.updateResizeListeners();
},
windowedWidth: 0,
windowedHeight: 0,
setFullScreenCanvasSize: function() {
// check if SDL is available
if (typeof SDL != "undefined") {
var flags = {{{ makeGetValue('SDL.screen+Runtime.QUANTUM_SIZE*0', '0', 'i32', 0, 1) }}};
flags = flags | 0x00800000; // set SDL_FULLSCREEN flag
{{{ makeSetValue('SDL.screen+Runtime.QUANTUM_SIZE*0', '0', 'flags', 'i32') }}}
}
Browser.updateResizeListeners();
},
setWindowedCanvasSize: function() {
// check if SDL is available
if (typeof SDL != "undefined") {
var flags = {{{ makeGetValue('SDL.screen+Runtime.QUANTUM_SIZE*0', '0', 'i32', 0, 1) }}};
flags = flags & ~0x00800000; // clear SDL_FULLSCREEN flag
{{{ makeSetValue('SDL.screen+Runtime.QUANTUM_SIZE*0', '0', 'flags', 'i32') }}}
}
Browser.updateResizeListeners();
},
updateCanvasDimensions : function(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['webkitFullScreenElement'] || document['webkitFullscreenElement'] ||
document['mozFullScreenElement'] || document['mozFullscreenElement'] ||
document['fullScreenElement'] || document['fullscreenElement'] ||
document['msFullScreenElement'] || document['msFullscreenElement'] ||
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_async_wget: function(url, file, onload, onerror) {
var _url = Pointer_stringify(url);
var _file = Pointer_stringify(file);
function doCallback(callback) {
if (callback) {
var stack = Runtime.stackSave();
Runtime.dynCall('vi', callback, [allocate(intArrayFromString(_file), 'i8', ALLOC_STACK)]);
Runtime.stackRestore(stack);
}
}
FS.createPreloadedFile(
PATH.dirname(_file),
PATH.basename(_file),
_url, true, true,
function() {
doCallback(onload);
},
function() {
doCallback(onerror);
}
);
},
emscripten_async_wget_data: function(url, arg, onload, onerror) {
Browser.asyncLoad(Pointer_stringify(url), function(byteArray) {
var buffer = _malloc(byteArray.length);
HEAPU8.set(byteArray, buffer);
Runtime.dynCall('viii', onload, [arg, buffer, byteArray.length]);
_free(buffer);
}, function() {
if (onerror) Runtime.dynCall('vi', onerror, [arg]);
}, true /* no need for run dependency, this is async but will not do any prepare etc. step */ );
},
emscripten_async_wget2: function(url, file, request, param, arg, onload, onerror, onprogress) {
var _url = Pointer_stringify(url);
var _file = Pointer_stringify(file);
var _request = Pointer_stringify(request);
var _param = Pointer_stringify(param);
var index = _file.lastIndexOf('/');
var http = new XMLHttpRequest();
http.open(_request, _url, true);
http.responseType = 'arraybuffer';
// LOAD
http.onload = function http_onload(e) {
if (http.status == 200) {
FS.createDataFile( _file.substr(0, index), _file.substr(index + 1), new Uint8Array(http.response), true, true);
if (onload) {
var stack = Runtime.stackSave();
Runtime.dynCall('vii', onload, [arg, allocate(intArrayFromString(_file), 'i8', ALLOC_STACK)]);
Runtime.stackRestore(stack);
}
} else {
if (onerror) Runtime.dynCall('vii', onerror, [arg, http.status]);
}
};
// ERROR
http.onerror = function http_onerror(e) {
if (onerror) Runtime.dynCall('vii', onerror, [arg, http.status]);
};
// PROGRESS
http.onprogress = function http_onprogress(e) {
if (e.lengthComputable || (e.lengthComputable === undefined && e.total != 0)) {
var percentComplete = (e.loaded / e.total)*100;
if (onprogress) Runtime.dynCall('vii', onprogress, [arg, percentComplete]);
}
};
// Useful because the browser can limit the number of redirection
try {
if (http.channel instanceof Ci.nsIHttpChannel)
http.channel.redirectionLimit = 0;
} catch (ex) { /* whatever */ }
if (_request == "POST") {
//Send the proper header information along with the request
http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
http.setRequestHeader("Content-length", _param.length);
http.setRequestHeader("Connection", "close");
http.send(_param);
} else {
http.send(null);
}
},
emscripten_async_wget2_data: function(url, request, param, arg, free, onload, onerror, onprogress) {
var _url = Pointer_stringify(url);
var _request = Pointer_stringify(request);
var _param = Pointer_stringify(param);
var http = new XMLHttpRequest();
http.open(_request, _url, true);
http.responseType = 'arraybuffer';
// LOAD
http.onload = function http_onload(e) {
if (http.status == 200 || _url.substr(0,4).toLowerCase() != "http") {
var byteArray = new Uint8Array(http.response);
var buffer = _malloc(byteArray.length);
HEAPU8.set(byteArray, buffer);
if (onload) Runtime.dynCall('viii', onload, [arg, buffer, byteArray.length]);
if (free) _free(buffer);
} else {
if (onerror) Runtime.dynCall('viii', onerror, [arg, http.status, http.statusText]);
}
};
// ERROR
http.onerror = function http_onerror(e) {
if (onerror) Runtime.dynCall('viii', onerror, [arg, http.status, http.statusText]);
};
// PROGRESS
http.onprogress = function http_onprogress(e) {
if (onprogress) Runtime.dynCall('viii', onprogress, [arg, e.loaded, e.lengthComputable || e.lengthComputable === undefined ? e.total : 0]);
};
// Useful because the browser can limit the number of redirection
try {
if (http.channel instanceof Ci.nsIHttpChannel)
http.channel.redirectionLimit = 0;
} catch (ex) { /* whatever */ }
if (_request == "POST") {
//Send the proper header information along with the request
http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
http.setRequestHeader("Content-length", _param.length);
http.setRequestHeader("Connection", "close");
http.send(_param);
} else {
http.send(null);
}
},
emscripten_async_prepare: function(file, onload, onerror) {
Module['noExitRuntime'] = true;
var _file = Pointer_stringify(file);
var data = FS.analyzePath(_file);
if (!data.exists) return -1;
FS.createPreloadedFile(
PATH.dirname(_file),
PATH.basename(_file),
new Uint8Array(data.object.contents), true, true,
function() {
if (onload) Runtime.dynCall('vi', onload, [file]);
},
function() {
if (onerror) Runtime.dynCall('vi', onerror, [file]);
},
true // don'tCreateFile - it's already there
);
return 0;
},
emscripten_async_prepare_data: function(data, size, suffix, arg, onload, onerror) {
Module['noExitRuntime'] = true;
var _suffix = Pointer_stringify(suffix);
if (!Browser.asyncPrepareDataCounter) Browser.asyncPrepareDataCounter = 0;
var name = 'prepare_data_' + (Browser.asyncPrepareDataCounter++) + '.' + _suffix;
var cname = _malloc(name.length+1);
writeStringToMemory(name, cname);
FS.createPreloadedFile(
'/',
name,
{{{ makeHEAPView('U8', 'data', 'data + size') }}},
true, true,
function() {
if (onload) Runtime.dynCall('vii', onload, [arg, cname]);
},
function() {
if (onerror) Runtime.dynCall('vi', onerror, [arg]);
},
true // don'tCreateFile - it's already there
);
return 0;
},
emscripten_async_run_script__deps: ['emscripten_run_script'],
emscripten_async_run_script: function(script, millis) {
Module['noExitRuntime'] = true;
// TODO: cache these to avoid generating garbage
Browser.safeSetTimeout(function() {
_emscripten_run_script(script);
}, millis);
},
emscripten_async_load_script: function(url, onload, onerror) {
Module['noExitRuntime'] = true;
onload = Runtime.getFuncWrapper(onload, 'v');
assert(runDependencies === 0, 'async_load_script must be run when no other dependencies are active');
var script = document.createElement('script');
script.onload = function script_onload() {
if (runDependencies > 0) {
dependenciesFulfilled = onload;
} else {
onload();
}
};
script.onerror = onerror;
script.src = Pointer_stringify(url);
document.body.appendChild(script);
},
emscripten_set_main_loop: function(func, fps, simulateInfiniteLoop, arg) {
Module['noExitRuntime'] = true;
assert(!Browser.mainLoop.scheduler, 'there can only be one main loop function at once: call emscripten_cancel_main_loop to cancel the previous one, if you want to');
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;
}
}
console.log('main loop blocker "' + blocker.name + '" took ' + (Date.now() - start) + ' ms'); //, left: ' + Browser.mainLoop.remainingBlockers);
Browser.mainLoop.updateStatus();
setTimeout(Browser.mainLoop.runner, 0);
return;
}
if (Browser.mainLoop.shouldPause) {
// catch pauses from non-main loop sources
Browser.mainLoop.paused = true;
Browser.mainLoop.shouldPause = false;
return;
}
// 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
GL.newRenderingFrameStarted();
#endif
#if LEGACY_GL_EMULATION
GL.newRenderingFrameStarted();
#endif
if (Browser.mainLoop.method === 'timeout' && Module.ctx) {
Module.printErr('Looks like you are rendering without using requestAnimationFrame for the main loop. You should use 0 for the frame rate in emscripten_set_main_loop in order to use requestAnimationFrame, as that can greatly improve your frame rates!');
Browser.mainLoop.method = ''; // just warn once per call to set main loop
}
if (Module['preMainLoop']) {
Module['preMainLoop']();
}
try {
if (typeof arg !== 'undefined') {
Runtime.dynCall('vi', func, [arg]);
} else {
Runtime.dynCall('v', func);
}
} catch (e) {
if (e instanceof ExitStatus) {
return;
} else {
if (e && typeof e === 'object' && e.stack) Module.printErr('exception thrown: ' + [e, e.stack]);
throw e;
}
}
if (Module['postMainLoop']) {
Module['postMainLoop']();
}
if (Browser.mainLoop.shouldPause) {
// catch pauses from the main loop itself
Browser.mainLoop.paused = true;
Browser.mainLoop.shouldPause = false;
return;
}
Browser.mainLoop.scheduler();
}
if (fps && fps > 0) {
Browser.mainLoop.scheduler = function Browser_mainLoop_scheduler() {
setTimeout(Browser.mainLoop.runner, 1000/fps); // doing this each time means that on exception, we stop
};
Browser.mainLoop.method = 'timeout';
} else {
Browser.mainLoop.scheduler = function Browser_mainLoop_scheduler() {
Browser.requestAnimationFrame(Browser.mainLoop.runner);
};
Browser.mainLoop.method = 'rAF';
}
Browser.mainLoop.scheduler();