61 lines
1.9 KiB
JavaScript
61 lines
1.9 KiB
JavaScript
// feature checking trashcode (c) obrado 1989
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window.addEventListener("load", function() {
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var support = {
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anim: true,
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canvas: true,
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webgl: true,
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idb: true
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};
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if(!document.getElementById("cs").getContext)
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support.canvas = false;
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// check for webgl support
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var canvas = document.getElementById("cs");
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Rendering.context = canvas.getContext("webgl");
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if(!Rendering.context) {
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Rendering.context = canvas.getContext("experimental-webgl");
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if(!Rendering.context)
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support.webgl = false;
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}
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// check for animation frame support
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window.requestAnimationFrame = window.requestAnimationFrame
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|| window.webkitRequestAnimationFrame
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|| window.mozRequestAnimationFrame
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|| window.oRequestAnimationFrame
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|| window.msRequestAnimationFrame;
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if(!window.requestAnimationFrame)
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support.anim = false;
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// check for indexedDB support
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window.indexedDB = window.indexedDB
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|| window.mozIndexedDB
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|| window.webkitIndexedDB
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|| window.msIndexedDB;
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window.IDBTransaction = window.IDBTransaction
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|| window.webkitIDBTransaction
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|| window.msIDBransaction;
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window.IDBKeyRange = window.IDBKeyRange
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|| window.webkitIDBKeyRange
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|| window.msIDBKeyRange;
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if(!window.indexedDB)
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support.idb = false;
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var supported = true;
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for(var i in support)
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supported = supported && support[i];
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if(!supported) {
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var supportStr = "";
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for(var i in support)
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supportStr += ""+ (+support[i]);
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window.location.href = "error.html?err="+ supportStr;
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return;
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}
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Entrypoint.start();
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});
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