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"use strict";
function parseArgs() {
var query = window.location.search.substring(1);
var split = query.split("&");
var args = {}
for (var i = 0; i < split.length; i++) {
var pair = split[i].split("=");
var key = pair[0];
var value = true;
if (pair.length >= 2) {
eval("value = " + decodeURIComponent(pair[1]) + ";");
}
args[key] = value;
}
return args;
}
var gArgs = null;
function arg(key, defaultVal) {
if (gArgs === null) {
gArgs = parseArgs();
}
if (!(key in gArgs))
return defaultVal;
return gArgs[key];
}
function initGL(canvas) {
if (arg("nogl"))
return null;
var gl = null;
var withAA = arg("aa", false);
var withAlpha = arg("alpha", false);
var withDepth = arg("depth", false);
var withPremult = arg("premult", false);
var withPreserve = arg("preserve", false);
var withStencil = arg("stencil", false);
try {
var argDict = {
alpha: withAlpha,
depth: withDepth,
stencil: withStencil,
antialias: withAA,
premultipliedAlpha: withPremult,
preserveDrawingBuffer: withPreserve,
};
gl = canvas.getContext("webgl", argDict);
} catch(e) {}
return gl;
}
function rAF(func) {
var raf = window.requestAnimationFrame;
raf(func);
}
var MAX_WAIT_FOR_COMPOSITE_DELAY_MS = 500;
function waitForComposite(func) {
var isDone = false;
var doneFunc = function () {
if (isDone)
return;
isDone = true;
func();
};
rAF(doneFunc);
setTimeout(doneFunc, MAX_WAIT_FOR_COMPOSITE_DELAY_MS);
}
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