1/**
 2 * @author alteredq / http://alteredqualia.com/
 3 * @author mr.doob / http://mrdoob.com/
 4 */
 5
 6var Detector = {
 7
 8	canvas: !! window.CanvasRenderingContext2D,
 9	webgl: ( function () {
10
11		try {
12
13			var canvas = document.createElement( 'canvas' ); return !! ( window.WebGLRenderingContext && ( canvas.getContext( 'webgl' ) || canvas.getContext( 'experimental-webgl' ) ) );
14
15		} catch ( e ) {
16
17			return false;
18
19		}
20
21	} )(),
22	workers: !! window.Worker,
23	fileapi: window.File && window.FileReader && window.FileList && window.Blob,
24
25	getWebGLErrorMessage: function () {
26
27		var element = document.createElement( 'div' );
28		element.id = 'webgl-error-message';
29		element.style.fontFamily = 'monospace';
30		element.style.fontSize = '13px';
31		element.style.fontWeight = 'normal';
32		element.style.textAlign = 'center';
33		element.style.background = '#fff';
34		element.style.color = '#000';
35		element.style.padding = '1.5em';
36		element.style.width = '400px';
37		element.style.margin = '5em auto 0';
38
39		if ( ! this.webgl ) {
40
41			element.innerHTML = window.WebGLRenderingContext ? [
42				'Your graphics card does not seem to support <a href="http://khronos.org/webgl/wiki/Getting_a_WebGL_Implementation" style="color:#000">WebGL</a>.<br />',
43				'Find out how to get it <a href="http://get.webgl.org/" style="color:#000">here</a>.'
44			].join( '\n' ) : [
45				'Your browser does not seem to support <a href="http://khronos.org/webgl/wiki/Getting_a_WebGL_Implementation" style="color:#000">WebGL</a>.<br/>',
46				'Find out how to get it <a href="http://get.webgl.org/" style="color:#000">here</a>.'
47			].join( '\n' );
48
49		}
50
51		return element;
52
53	},
54
55	addGetWebGLMessage: function ( parameters ) {
56
57		var parent, id, element;
58
59		parameters = parameters || {};
60
61		parent = parameters.parent !== undefined ? parameters.parent : document.body;
62		id = parameters.id !== undefined ? parameters.id : 'oldie';
63
64		element = Detector.getWebGLErrorMessage();
65		element.id = id;
66
67		parent.appendChild( element );
68
69	}
70
71};
72
73// browserify support
74if ( typeof module === 'object' ) {
75
76	module.exports = Detector;
77
78}