80 lines
2.3 KiB
JavaScript
80 lines
2.3 KiB
JavaScript
|
/**
|
||
|
|
* @author alteredq / http://alteredqualia.com/
|
||
|
|
* @author mr.doob / http://mrdoob.com/
|
||
|
|
*/
|
||
|
|
|
||
|
|
var Detector = {
|
||
|
|
|
||
|
|
canvas: !!window.CanvasRenderingContext2D,
|
||
|
|
webgl: (function () {
|
||
|
|
|
||
|
|
try {
|
||
|
|
|
||
|
|
var canvas = document.createElement('canvas');
|
||
|
|
return !!( window.WebGLRenderingContext && ( canvas.getContext('webgl') || canvas.getContext('experimental-webgl') ) );
|
||
|
|
|
||
|
|
} catch (e) {
|
||
|
|
|
||
|
|
return false;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
})(),
|
||
|
|
workers: !!window.Worker,
|
||
|
|
fileapi: window.File && window.FileReader && window.FileList && window.Blob,
|
||
|
|
|
||
|
|
getWebGLErrorMessage: function () {
|
||
|
|
|
||
|
|
var element = document.createElement('div');
|
||
|
|
element.id = 'webgl-error-message';
|
||
|
|
element.style.fontFamily = 'monospace';
|
||
|
|
element.style.fontSize = '13px';
|
||
|
|
element.style.fontWeight = 'normal';
|
||
|
|
element.style.textAlign = 'center';
|
||
|
|
element.style.background = '#fff';
|
||
|
|
element.style.color = '#000';
|
||
|
|
element.style.padding = '1.5em';
|
||
|
|
element.style.width = '400px';
|
||
|
|
element.style.margin = '5em auto 0';
|
||
|
|
|
||
|
|
if (!this.webgl) {
|
||
|
|
|
||
|
|
element.innerHTML = window.WebGLRenderingContext ? [
|
||
|
|
'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 />',
|
||
|
|
'Find out how to get it <a href="http://get.webgl.org/" style="color:#000">here</a>.'
|
||
|
|
].join('\n') : [
|
||
|
|
'Your browser does not seem to support <a href="http://khronos.org/webgl/wiki/Getting_a_WebGL_Implementation" style="color:#000">WebGL</a>.<br/>',
|
||
|
|
'Find out how to get it <a href="http://get.webgl.org/" style="color:#000">here</a>.'
|
||
|
|
].join('\n');
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
return element;
|
||
|
|
|
||
|
|
},
|
||
|
|
|
||
|
|
addGetWebGLMessage: function (parameters) {
|
||
|
|
|
||
|
|
var parent, id, element;
|
||
|
|
|
||
|
|
parameters = parameters || {};
|
||
|
|
|
||
|
|
parent = parameters.parent !== undefined ? parameters.parent : document.body;
|
||
|
|
id = parameters.id !== undefined ? parameters.id : 'oldie';
|
||
|
|
|
||
|
|
element = Detector.getWebGLErrorMessage();
|
||
|
|
element.id = id;
|
||
|
|
|
||
|
|
parent.appendChild(element);
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
// browserify support
|
||
|
|
if (typeof module === 'object') {
|
||
|
|
|
||
|
|
module.exports = Detector;
|
||
|
|
|
||
|
|
}
|