phaser/src/pixi/utils/Detector.js

/**
 * @author Mat Groves http://matgroves.com/ @Doormat23
 */

/**
 * This helper function will automatically detect which renderer you should be using.
 * WebGL is the preferred renderer as it is a lot fastest. If webGL is not supported by
 * the browser then this function will return a canvas renderer
 *
 * @method autoDetectRenderer
 * @static
 * @param width {Number} the width of the renderers view
 * @param height {Number} the height of the renderers view
 * @param view {Canvas} the canvas to use as a view, optional
 * @param transparent=false {Boolean} the transparency of the render view, default false
 * @param antialias=false {Boolean} sets antialias (only applicable in webGL chrome at the moment)
 *
 * antialias
 */
PIXI.autoDetectRenderer = function(width, height, view, transparent, antialias)
{
	if(!width)width = 800;
	if(!height)height = 600;

	// BORROWED from Mr Doob (mrdoob.com)
	var webgl = ( function () { try { var canvas = document.createElement( 'canvas' ); return !! window.WebGLRenderingContext && ( canvas.getContext( 'webgl' ) || canvas.getContext( 'experimental-webgl' ) ); } catch( e ) { return false; } } )();

	if(webgl)
	{
		var ie =  (navigator.userAgent.toLowerCase().indexOf('msie') != -1);
		 webgl = !ie;
	}
	
	//console.log(webgl);
	if( webgl )
	{
		return new PIXI.WebGLRenderer(width, height, view, transparent, antialias);
	}

	return	new PIXI.CanvasRenderer(width, height, view, transparent);
};