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// proxy to/from worker
// utils
function FPSTracker(text) {
var last = 0;
var mean = 0;
var counter = 0;
this.tick = function() {
var now = Date.now();
if (last > 0) {
var diff = now - last;
mean = 0.99*mean + 0.01*diff;
if (counter++ === 60) {
counter = 0;
dump(text + ' fps: ' + (1000/mean).toFixed(2) + '\n');
}
}
last = now;
};
}
/*
function GenericTracker(text) {
var mean = 0;
var counter = 0;
this.tick = function(value) {
mean = 0.99*mean + 0.01*value;
if (counter++ === 60) {
counter = 0;
dump(text + ': ' + (mean).toFixed(2) + '\n');
}
};
}
*/
// render
var renderFrameData = null;
function renderFrame() {
var dst = Module.canvasData.data;
if (dst.set) {
dst.set(renderFrameData);
} else {
for (var i = 0; i < renderFrameData.length; i++) {
dst[i] = renderFrameData[i];
}
}
Module.ctx.putImageData(Module.canvasData, 0, 0);
renderFrameData = null;
}
window.requestAnimationFrame = window.requestAnimationFrame || window.mozRequestAnimationFrame ||
window.webkitRequestAnimationFrame || window.msRequestAnimationFrame ||
renderFrame;
/*
(function() {
var trueRAF = window.requestAnimationFrame;
var tracker = new FPSTracker('client');
window.requestAnimationFrame = function(func) {
trueRAF(function() {
tracker.tick();
func();
});
}
})();
*/
// end render
// Frame throttling
var frameId = 0;
// Worker
var worker = new Worker('{{{ filename }}}.js');
WebGLClient.prefetch();
setTimeout(function() {
worker.postMessage({ target: 'worker-init', width: Module.canvas.width, height: Module.canvas.height, preMain: true });
}, 0); // delay til next frame, to make sure html is ready
var workerResponded = false;
worker.onmessage = function worker_onmessage(event) {
//dump('\nclient got ' + JSON.stringify(event.data).substr(0, 150) + '\n');
if (!workerResponded) {
workerResponded = true;
if (Module.setStatus) Module.setStatus('');
}
var data = event.data;
switch (data.target) {
case 'stdout': {
Module.print(data.content);
break;
}
case 'stderr': {
Module.printErr(data.content);
break;
}
case 'window': {
window[data.method]();
break;
}
case 'canvas': {
switch (data.op) {
case 'getContext': {
Module.ctx = Module.canvas.getContext(data.type, data.attributes);
if (data.type !== '2d') {
// possible GL_DEBUG entry point: Module.ctx = wrapDebugGL(Module.ctx);
Module.glClient = new WebGLClient();
}
break;
}
case 'resize': {
Module.canvas.width = data.width;
Module.canvas.height = data.height;
if (Module.ctx && Module.ctx.getImageData) Module.canvasData = Module.ctx.getImageData(0, 0, data.width, data.height);
worker.postMessage({ target: 'canvas', boundingClientRect: cloneObject(Module.canvas.getBoundingClientRect()) });
break;
}
case 'render': {
if (renderFrameData) {
// previous image was not rendered yet, just update image
renderFrameData = data.image.data;
} else {
// previous image was rendered so update image and request another frame
renderFrameData = data.image.data;
window.requestAnimationFrame(renderFrame);
}
break;
}
default: throw 'eh?';
}
break;
}
case 'gl': {
Module.glClient.onmessage(data);
break;
}
case 'tick': {
frameId = data.id;
worker.postMessage({ target: 'tock', id: frameId });
break;
}
case 'Image': {
assert(data.method === 'src');
var img = new Image();
img.onload = function() {
assert(img.complete);
var canvas = document.createElement('canvas');
canvas.width = img.width;
canvas.height = img.height;
var ctx = canvas.getContext('2d');
ctx.drawImage(img, 0, 0);
var imageData = ctx.getImageData(0, 0, img.width, img.height);
worker.postMessage({ target: 'Image', method: 'onload', id: data.id, width: img.width, height: img.height, data: imageData.data, preMain: true });
};
img.onerror = function() {
worker.postMessage({ target: 'Image', method: 'onerror', id: data.id, preMain: true });
};
img.src = data.src;
break;
}
default: throw 'what?';
}
};
function cloneObject(event) {
var ret = {};
for (var x in event) {
if (x == x.toUpperCase()) continue;
var prop = event[x];
if (typeof prop === 'number' || typeof prop === 'string') ret[x] = prop;
}
return ret;
};
['keydown', 'keyup', 'keypress', 'blur', 'visibilitychange'].forEach(function(event) {
document.addEventListener(event, function(event) {
worker.postMessage({ target: 'document', event: cloneObject(event) });
event.preventDefault();
});
});
['unload'].forEach(function(event) {
window.addEventListener(event, function(event) {
worker.postMessage({ target: 'window', event: cloneObject(event) });
});
});
['mousedown', 'mouseup', 'mousemove', 'DOMMouseScroll', 'mousewheel', 'mouseout'].forEach(function(event) {
Module.canvas.addEventListener(event, function(event) {
worker.postMessage({ target: 'canvas', event: cloneObject(event) });
event.preventDefault();
}, true);
});
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