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library_browser.js
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// Copyright 2011 The Emscripten Authors. All rights reserved.
// Emscripten is available under two separate licenses, the MIT license and the
// University of Illinois/NCSA Open Source License. Both these licenses can be
// found in the LICENSE file.
//"use strict";
// Utilities for browser environments
var LibraryBrowser = {
$Browser__deps: ['emscripten_set_main_loop', 'emscripten_set_main_loop_timing'],
$Browser__postset: 'Module["requestFullScreen"] = function Module_requestFullScreen(lockPointer, resizeCanvas, vrDevice) { err("Module.requestFullScreen is deprecated. Please call Module.requestFullscreen instead."); Module["requestFullScreen"] = Module["requestFullscreen"]; Browser.requestFullScreen(lockPointer, resizeCanvas, vrDevice) };\n' + // exports
'Module["requestFullscreen"] = function Module_requestFullscreen(lockPointer, resizeCanvas, vrDevice) { Browser.requestFullscreen(lockPointer, resizeCanvas, vrDevice) };\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() }\n' +
'Module["createContext"] = function Module_createContext(canvas, useWebGL, setInModule, webGLContextAttributes) { return Browser.createContext(canvas, useWebGL, setInModule, webGLContextAttributes) }',
$Browser: {
mainLoop: {
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.
currentlyRunningMainloop: 0,
func: null, // The main loop tick function that will be called at each iteration.
arg: 0, // The argument that will be passed to the main loop. (of type void*)
timingMode: 0,
timingValue: 0,
currentFrameNumber: 0,
queue: [],
pause: function() {
Browser.mainLoop.scheduler = null;
Browser.mainLoop.currentlyRunningMainloop++; // Incrementing this signals the previous main loop that it's now become old, and it must return.
},
resume: function() {
Browser.mainLoop.currentlyRunningMainloop++;
var timingMode = Browser.mainLoop.timingMode;
var timingValue = Browser.mainLoop.timingValue;
var func = Browser.mainLoop.func;
Browser.mainLoop.func = null;
_emscripten_set_main_loop(func, 0, false, Browser.mainLoop.arg, true /* do not set timing and call scheduler, we will do it on the next lines */);
_emscripten_set_main_loop_timing(timingMode, timingValue);
Browser.mainLoop.scheduler();
},
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']('');
}
}
},
runIter: function(func) {
if (ABORT) return;
if (Module['preMainLoop']) {
var preRet = Module['preMainLoop']();
if (preRet === false) {
return; // |return false| skips a frame
}
}
try {
func();
} catch (e) {
if (e instanceof ExitStatus) {
return;
} else {
if (e && typeof e === 'object' && e.stack) err('exception thrown: ' + [e, e.stack]);
throw e;
}
}
if (Module['postMainLoop']) Module['postMainLoop']();
}
},
isFullscreen: false,
pointerLock: false,
moduleContextCreatedCallbacks: [],
workers: [],
init: function() {
if (!Module["preloadPlugins"]) Module["preloadPlugins"] = []; // needs to exist even in workers
if (Browser.initted) 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) {
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);
#if WASM
#if MAIN_MODULE
var wasmPlugin = {};
wasmPlugin['asyncWasmLoadPromise'] = new Promise(
function(resolve, reject) { return resolve(); });
wasmPlugin['canHandle'] = function(name) {
return !Module.noWasmDecoding && name.endsWith('.so');
};
wasmPlugin['handle'] = function(byteArray, name, onload, onerror) {
// loadWebAssemblyModule can not load modules out-of-order, so rather
// than just running the promises in parallel, this makes a chain of
// promises to run in series.
this['asyncWasmLoadPromise'] = this['asyncWasmLoadPromise'].then(
function() {
return loadWebAssemblyModule(byteArray, {loadAsync: true, nodelete: true});
}).then(
function(module) {
Module['preloadedWasm'][name] = module;
onload();
},
function(err) {
console.warn("Couldn't instantiate wasm: " + name + " '" + err + "'");
onerror();
});
};
Module['preloadPlugins'].push(wasmPlugin);
#endif // MAIN_MODULE
#endif // WASM
// 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'] ||
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);
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 && Module['canvas'].requestPointerLock) {
Module['canvas'].requestPointerLock();
ev.preventDefault();
}
}, false);
}
}
},
createContext: function(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 (webGLContextAttributes) {
for (var attribute in webGLContextAttributes) {
contextAttributes[attribute] = webGLContextAttributes[attribute];
}
}
contextHandle = GL.createContext(canvas, contextAttributes);
if (contextHandle) {
ctx = GL.getContext(contextHandle).GLctx;
}
} else {
ctx = canvas.getContext('2d');
}
if (!ctx) return null;
if (setInModule) {
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');
Module.ctx = ctx;
if (useWebGL) GL.makeContextCurrent(contextHandle);
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, vrDevice) {
Browser.lockPointer = lockPointer;
Browser.resizeCanvas = resizeCanvas;
Browser.vrDevice = vrDevice;
if (typeof Browser.lockPointer === 'undefined') Browser.lockPointer = true;
if (typeof Browser.resizeCanvas === 'undefined') Browser.resizeCanvas = false;
if (typeof Browser.vrDevice === 'undefined') Browser.vrDevice = null;
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 = document['exitFullscreen'] ||
document['cancelFullScreen'] ||
document['mozCancelFullScreen'] ||
document['msExitFullscreen'] ||
document['webkitCancelFullScreen'] ||
function() {};
canvas.exitFullscreen = canvas.exitFullscreen.bind(document);
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);
}
}
if (Module['onFullScreen']) Module['onFullScreen'](Browser.isFullscreen);
if (Module['onFullscreen']) 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'] ? function() { canvasContainer['webkitRequestFullscreen'](Element['ALLOW_KEYBOARD_INPUT']) } : null) ||
(canvasContainer['webkitRequestFullScreen'] ? function() { canvasContainer['webkitRequestFullScreen'](Element['ALLOW_KEYBOARD_INPUT']) } : null);
if (vrDevice) {
canvasContainer.requestFullscreen({ vrDisplay: vrDevice });
} else {
canvasContainer.requestFullscreen();
}
},
requestFullScreen: function(lockPointer, resizeCanvas, vrDevice) {
err('Browser.requestFullScreen() is deprecated. Please call Browser.requestFullscreen instead.');
Browser.requestFullScreen = function(lockPointer, resizeCanvas, vrDevice) {
return Browser.requestFullscreen(lockPointer, resizeCanvas, vrDevice);
}
return Browser.requestFullscreen(lockPointer, resizeCanvas, vrDevice);
},
nextRAF: 0,
fakeRequestAnimationFrame: function(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: function requestAnimationFrame(func) {
if (typeof window === 'undefined') { // Provide fallback to setTimeout if window is undefined (e.g. in Node.js)
Browser.fakeRequestAnimationFrame(func);
} else {
if (!window.requestAnimationFrame) {
window.requestAnimationFrame = window['requestAnimationFrame'] ||
window['mozRequestAnimationFrame'] ||
window['webkitRequestAnimationFrame'] ||
window['msRequestAnimationFrame'] ||
window['oRequestAnimationFrame'] ||
Browser.fakeRequestAnimationFrame;
}
window.requestAnimationFrame(func);
}
},
// generic abort-aware wrapper for an async callback
safeCallback: function(func) {
return function() {
if (!ABORT) return func.apply(null, arguments);
};
},
// abort and pause-aware versions TODO: build main loop on top of this?
allowAsyncCallbacks: true,
queuedAsyncCallbacks: [],
pauseAsyncCallbacks: function() {
Browser.allowAsyncCallbacks = false;
},
resumeAsyncCallbacks: function() { // marks future callbacks as ok to execute, and synchronously runs any remaining ones right now
Browser.allowAsyncCallbacks = true;
if (Browser.queuedAsyncCallbacks.length > 0) {
var callbacks = Browser.queuedAsyncCallbacks;
Browser.queuedAsyncCallbacks = [];
callbacks.forEach(function(func) {
func();
});
}
},
safeRequestAnimationFrame: function(func) {
return Browser.requestAnimationFrame(function() {
if (ABORT) return;
if (Browser.allowAsyncCallbacks) {
func();
} else {
Browser.queuedAsyncCallbacks.push(func);
}
});
},
safeSetTimeout: function(func, timeout) {
Module['noExitRuntime'] = true;
return setTimeout(function() {
if (ABORT) return;
if (Browser.allowAsyncCallbacks) {
func();
} else {
Browser.queuedAsyncCallbacks.push(func);
}
}, timeout);
},
safeSetInterval: function(func, timeout) {
Module['noExitRuntime'] = true;
return setInterval(function() {
if (ABORT) return;
if (Browser.allowAsyncCallbacks) {
func();
} // drop it on the floor otherwise, next interval will kick in
}, 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;
},
// 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.
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 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') {
var last = Browser.touches[touch.identifier];
if (!last) last = coords;
Browser.lastTouches[touch.identifier] = last;
Browser.touches[touch.identifier] = coords;
}
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;
}
},
asyncLoad: function(url, onload, onerror, noRunDep) {
var dep = !noRunDep ? getUniqueRunDependency('al ' + url) : '';
Module['readAsync'](url, function(arrayBuffer) {
assert(arrayBuffer, 'Loading data file "' + url + '" failed (no arrayBuffer).');
onload(new Uint8Array(arrayBuffer));
if (dep) removeRunDependency(dep);
}, function(event) {
if (onerror) {
onerror();
} else {
throw 'Loading data file "' + url + '" failed.';
}
});
if (dep) addRunDependency(dep);
},
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', '0', 'i32', 0, 1) }}};
flags = flags | 0x00800000; // set SDL_FULLSCREEN flag
{{{ makeSetValue('SDL.screen', '0', 'flags', 'i32') }}}
}
Browser.updateCanvasDimensions(Module['canvas']);
Browser.updateResizeListeners();
},
setWindowedCanvasSize: function() {
// check if SDL is available
if (typeof SDL != "undefined") {
var flags = {{{ makeGetValue('SDL.screen', '0', 'i32', 0, 1) }}};
flags = flags & ~0x00800000; // clear SDL_FULLSCREEN flag
{{{ makeSetValue('SDL.screen', '0', 'flags', 'i32') }}}
}
Browser.updateCanvasDimensions(Module['canvas']);
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['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");
}
}
}
},
wgetRequests: {},
nextWgetRequestHandle: 0,
getNextWgetRequestHandle: function() {
var handle = Browser.nextWgetRequestHandle;
Browser.nextWgetRequestHandle++;
return handle;
}
},
emscripten_async_wget__deps: ['$PATH'],
emscripten_async_wget__proxy: 'sync',
emscripten_async_wget__sig: 'viiii',
emscripten_async_wget: function(url, file, onload, onerror) {
Module['noExitRuntime'] = true;
var _url = UTF8ToString(url);
var _file = UTF8ToString(file);
_file = PATH.resolve(FS.cwd(), _file);
function doCallback(callback) {
if (callback) {
var stack = stackSave();
Module['dynCall_vi'](callback, allocate(intArrayFromString(_file), 'i8', ALLOC_STACK));
stackRestore(stack);
}
}
var destinationDirectory = PATH.dirname(_file);
FS.createPreloadedFile(
destinationDirectory,
PATH.basename(_file),
_url, true, true,
function() {
doCallback(onload);
},
function() {
doCallback(onerror);
},
false, // dontCreateFile
false, // canOwn
function() { // preFinish
// if a file exists there, we overwrite it
try {
FS.unlink(_file);
} catch (e) {}
// if the destination directory does not yet exist, create it
FS.mkdirTree(destinationDirectory);
}
);
},
emscripten_async_wget_data__proxy: 'sync',
emscripten_async_wget_data__sig: 'viiii',
emscripten_async_wget_data: function(url, arg, onload, onerror) {
Browser.asyncLoad(UTF8ToString(url), function(byteArray) {
var buffer = _malloc(byteArray.length);
HEAPU8.set(byteArray, buffer);
Module['dynCall_viii'](onload, arg, buffer, byteArray.length);
_free(buffer);
}, function() {
if (onerror) Module['dynCall_vi'](onerror, arg);
}, true /* no need for run dependency, this is async but will not do any prepare etc. step */ );
},
emscripten_async_wget2__proxy: 'sync',
emscripten_async_wget2__sig: 'iiiiiiiii',
emscripten_async_wget2: function(url, file, request, param, arg, onload, onerror, onprogress) {
Module['noExitRuntime'] = true;
var _url = UTF8ToString(url);
var _file = UTF8ToString(file);
_file = PATH.resolve(FS.cwd(), _file);
var _request = UTF8ToString(request);
var _param = UTF8ToString(param);
var index = _file.lastIndexOf('/');
var http = new XMLHttpRequest();
http.open(_request, _url, true);
http.responseType = 'arraybuffer';
var handle = Browser.getNextWgetRequestHandle();
var destinationDirectory = PATH.dirname(_file);
// LOAD
http.onload = function http_onload(e) {
if (http.status == 200) {
// if a file exists there, we overwrite it
try {
FS.unlink(_file);
} catch (e) {}
// if the destination directory does not yet exist, create it
FS.mkdirTree(destinationDirectory);
FS.createDataFile( _file.substr(0, index), _file.substr(index + 1), new Uint8Array(http.response), true, true, false);
if (onload) {
var stack = stackSave();
Module['dynCall_viii'](onload, handle, arg, allocate(intArrayFromString(_file), 'i8', ALLOC_STACK));
stackRestore(stack);
}
} else {
if (onerror) Module['dynCall_viii'](onerror, handle, arg, http.status);
}
delete Browser.wgetRequests[handle];
};
// ERROR
http.onerror = function http_onerror(e) {
if (onerror) Module['dynCall_viii'](onerror, handle, arg, http.status);
delete Browser.wgetRequests[handle];
};
// 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) Module['dynCall_viii'](onprogress, handle, arg, percentComplete);
}
};
// ABORT
http.onabort = function http_onabort(e) {
delete Browser.wgetRequests[handle];
};
if (_request == "POST") {
//Send the proper header information along with the request
http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
http.send(_param);
} else {
http.send(null);
}
Browser.wgetRequests[handle] = http;
return handle;
},
emscripten_async_wget2_data__proxy: 'sync',
emscripten_async_wget2_data__sig: 'iiiiiiiii',
emscripten_async_wget2_data: function(url, request, param, arg, free, onload, onerror, onprogress) {
var _url = UTF8ToString(url);
var _request = UTF8ToString(request);
var _param = UTF8ToString(param);
var http = new XMLHttpRequest();
http.open(_request, _url, true);
http.responseType = 'arraybuffer';
var handle = Browser.getNextWgetRequestHandle();
// 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) Module['dynCall_viiii'](onload, handle, arg, buffer, byteArray.length);
if (free) _free(buffer);
} else {
if (onerror) Module['dynCall_viiii'](onerror, handle, arg, http.status, http.statusText);
}
delete Browser.wgetRequests[handle];
};
// ERROR
http.onerror = function http_onerror(e) {
if (onerror) {
Module['dynCall_viiii'](onerror, handle, arg, http.status, http.statusText);
}
delete Browser.wgetRequests[handle];
};
// PROGRESS
http.onprogress = function http_onprogress(e) {
if (onprogress) Module['dynCall_viiii'](onprogress, handle, arg, e.loaded, e.lengthComputable || e.lengthComputable === undefined ? e.total : 0);
};
// ABORT
http.onabort = function http_onabort(e) {
delete Browser.wgetRequests[handle];
};
if (_request == "POST") {
//Send the proper header information along with the request
http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
http.send(_param);
} else {
http.send(null);
}
Browser.wgetRequests[handle] = http;
return handle;
},
emscripten_async_wget2_abort__proxy: 'sync',
emscripten_async_wget2_abort__sig: 'vi',
emscripten_async_wget2_abort: function(handle) {
var http = Browser.wgetRequests[handle];
if (http) {
http.abort();
}
},
emscripten_run_preload_plugins__deps: ['$PATH'],
emscripten_run_preload_plugins__proxy: 'sync',
emscripten_run_preload_plugins__sig: 'iiii',
emscripten_run_preload_plugins: function(file, onload, onerror) {
Module['noExitRuntime'] = true;
var _file = UTF8ToString(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) Module['dynCall_vi'](onload, file);
},
function() {
if (onerror) Module['dynCall_vi'](onerror, file);
},
true // don'tCreateFile - it's already there
);
return 0;
},
emscripten_run_preload_plugins_data__proxy: 'sync',
emscripten_run_preload_plugins_data__sig: 'viiiiii',
emscripten_run_preload_plugins_data: function(data, size, suffix, arg, onload, onerror) {
Module['noExitRuntime'] = true;