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function PropertyBag() {
this.addProperty = function(){};
this.removeProperty = function(){};
};
function EventListener() {
this.listeners = {};
this.addEventListener = function addEventListener(event, func) {
if (!this.listeners[event]) this.listeners[event] = [];
this.listeners[event].push(func);
};
this.removeEventListener = function(event, func) {
var list = this.listeners[event];
if (!list) return;
var me = list.indexOf(func);
if (me < 0) return;
list.splice(me, 1);
};
this.fireEvent = function fireEvent(event) {
event.preventDefault = function(){};
if (event.type in this.listeners) {
this.listeners[event.type].forEach(function(listener) {
listener(event);
});
}
};
};
var window = this;
var windowExtra = new EventListener();
for (var x in windowExtra) window[x] = windowExtra[x];
window.close = function window_close() {
postMessage({ target: 'window', method: 'close' });
};
window.scrollX = window.scrollY = 0; // TODO: proxy these
var webGLWorker = new WebGLWorker();
var document = new EventListener();
document.createElement = function document_createElement(what) {
switch(what) {
case 'canvas': {
var canvas = new EventListener();
canvas.ensureData = function canvas_ensureData() {
if (!canvas.data || canvas.data.width !== canvas.width || canvas.data.height !== canvas.height) {
canvas.data = {
width: canvas.width,
height: canvas.height,
data: new Uint8Array(canvas.width*canvas.height*4)
};
if (canvas === Module['canvas']) {
postMessage({ target: 'canvas', op: 'resize', width: canvas.width, height: canvas.height });
}
}
};
canvas.getContext = function canvas_getContext(type, attributes) {
if (canvas === Module['canvas']) {
postMessage({ target: 'canvas', op: 'getContext', type: type, attributes: attributes });
}
if (type === '2d') {
return {
getImageData: function(x, y, w, h) {
assert(x == 0 && y == 0 && w == canvas.width && h == canvas.height);
canvas.ensureData();
return {
width: canvas.data.width,
height: canvas.data.height,
data: new Uint8Array(canvas.data.data) // TODO: can we avoid this copy?
};
},
putImageData: function(image, x, y) {
canvas.ensureData();
assert(x == 0 && y == 0 && image.width == canvas.width && image.height == canvas.height);
canvas.data.data.set(image.data); // TODO: can we avoid this copy?
if (canvas === Module['canvas']) {
postMessage({ target: 'canvas', op: 'render', image: canvas.data });
}
}
};
} else {
return webGLWorker;
}
};
canvas.boundingClientRect = {};
canvas.getBoundingClientRect = function canvas_getBoundingClientRect() {
return {
width: canvas.boundingClientRect.width,
height: canvas.boundingClientRect.height,
top: canvas.boundingClientRect.top,
left: canvas.boundingClientRect.left,
bottom: canvas.boundingClientRect.bottom,
right: canvas.boundingClientRect.right
};
};
canvas.style = new PropertyBag();
canvas.exitPointerLock = function(){};
return canvas;
}
default: throw 'document.createElement ' + what;
}
};
document.documentElement = {};
document.styleSheets = [{
cssRules: [], // TODO: forward to client
insertRule: function(rule, i) {
this.cssRules.splice(i, 0, rule);
}
}];
function Audio() {
Runtime.warnOnce('faking Audio elements, no actual sound will play');
}
Audio.prototype.play = function(){};
Audio.prototype.pause = function(){};
Audio.prototype.cloneNode = function() {
return new Audio;
}
if (typeof console === 'undefined') {
var console = {
log: function(x) {
Module.printErr(x);
},
error: function(x) {
Module.printErr(x);
},
};
}
Module.canvas = document.createElement('canvas');
Module.setStatus = function(){};
Module.print = function Module_print(x) {
//dump('OUT: ' + x + '\n');
postMessage({ target: 'stdout', content: x });
};
Module.printErr = function Module_printErr(x) {
//dump('ERR: ' + x + '\n');
postMessage({ target: 'stderr', content: x });
};
// Browser hooks
Browser.resizeListeners.push(function(width, height) {
postMessage({ target: 'canvas', op: 'resize', width: width, height: height });
});
// Frame throttling
var frameId = 0;
var clientFrameId = 0;
var postMainLoop = Module['postMainLoop'];
Module['postMainLoop'] = function() {
if (postMainLoop) postMainLoop();
// frame complete, send a frame id
postMessage({ target: 'tick', id: frameId++ });
commandBuffer = [];
};
// buffer messages until the program starts to run
var messageBuffer = null;
function messageResender() {
if (calledMain) {
assert(messageBuffer && messageBuffer.length > 0);
messageBuffer.forEach(function(message) {
onmessage(message);
});
messageBuffer = null;
} else {
setTimeout(messageResender, 100);
}
}
onmessage = function onmessage(message) {
if (!calledMain) {
if (!messageBuffer) {
messageBuffer = [];
setTimeout(messageResender, 100);
}
messageBuffer.push(message);
}
//dump('worker got ' + JSON.stringify(message.data) + '\n');
switch (message.data.target) {
case 'document': {
document.fireEvent(message.data.event);
break;
}
case 'window': {
window.fireEvent(message.data.event);
break;
}
case 'canvas': {
if (message.data.event) {
Module.canvas.fireEvent(message.data.event);
} else if (message.data.boundingClientRect) {
Module.canvas.boundingClientRect = message.data.boundingClientRect;
} else throw 'ey?';
break;
}
case 'gl': {
webGLWorker.onmessage(message.data);
break;
}
case 'tock': {
clientFrameId = message.data.id;
break;
}
default: throw 'wha? ' + message.data.target;
}
};
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