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Detector = {
canvas : !! window.CanvasRenderingContext2D,
webgl : ( function () { try { return !! window.WebGLRenderingContext && !! document.createElement( 'canvas' ).getContext( 'experimental-webgl' ); } catch( e ) { return false; } } )(),
workers : !! window.Worker,
fileapi : window.File && window.FileReader && window.FileList && window.Blob,
getWebGLErrorMessage : function () {
var domElement = document.createElement( 'div' );
domElement.style.fontFamily = 'monospace';
domElement.style.fontSize = '13px';
domElement.style.textAlign = 'center';
domElement.style.background = '#eee';
domElement.style.color = '#000';
domElement.style.width = '100%';
domElement.style.height = '50px';
if ( ! this.webgl ) {
domElement.innerHTML = window.WebGLRenderingContext ? [
'Your graphics card does not seem to support <a href="http://khronos.org/webgl/wiki/Getting_a_WebGL_Implementation">WebGL</a>.<br />',
'Find out how to get it <a href="http://get.webgl.org/">here</a>.'
].join( '\n' ) : [
'Your browser does not seem to support <a href="http://khronos.org/webgl/wiki/Getting_a_WebGL_Implementation">WebGL</a>.<br/>',
'Find out how to get it <a href="http://get.webgl.org/">here</a>.'
].join( '\n' );
}
return domElement;
},
addGetWebGLMessage : function ( parameters ) {
var parent, id, domElement;
parameters = parameters || {};
parent = parameters.parent !== undefined ? parameters.parent : document.body;
id = parameters.id !== undefined ? parameters.id : 'container';
domElement = Detector.getWebGLErrorMessage();
domElement.id = id;
parent.appendChild( domElement );
}
};
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