72 lines
2.0 KiB
JavaScript
72 lines
2.0 KiB
JavaScript
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/**
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* @author alteredq / http://alteredqualia.com/
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* @author mr.doob / http://mrdoob.com/
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*/
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export default {
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canvas: !!window.CanvasRenderingContext2D,
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webgl: (function() {
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try {
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var canvas = document.createElement('canvas');
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return !!( window.WebGLRenderingContext && ( canvas.getContext('webgl') || canvas.getContext('experimental-webgl') ) );
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} catch(e) {
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return false;
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}
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})(),
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workers: !!window.Worker,
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fileapi: window.File && window.FileReader && window.FileList && window.Blob,
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getWebGLErrorMessage: function() {
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var element = document.createElement('div');
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element.id = 'webgl-error-message';
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element.style.fontFamily = 'monospace';
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element.style.fontSize = '13px';
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element.style.fontWeight = 'normal';
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element.style.textAlign = 'center';
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element.style.background = '#fff';
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element.style.color = '#000';
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element.style.padding = '1.5em';
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element.style.width = '400px';
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element.style.margin = '5em auto 0';
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if(!this.webgl) {
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element.innerHTML = window.WebGLRenderingContext ? [
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'Your graphics card does not seem to support <a href="http://khronos.org/webgl/wiki/Getting_a_WebGL_Implementation" style="color:#000000">WebGL</a>.<br />',
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'Find out how to get it <a href="http://get.webgl.org/" style="color:#000000">here</a>.'
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].join('\n') : [
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'Your browser does not seem to support <a href="http://khronos.org/webgl/wiki/Getting_a_WebGL_Implementation" style="color:#000000">WebGL</a>.<br/>',
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'Find out how to get it <a href="http://get.webgl.org/" style="color:#000000">here</a>.'
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].join('\n');
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}
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return element;
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},
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addGetWebGLMessage: function(parameters) {
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var parent, id, element;
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parameters = parameters || {};
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parent = parameters.parent !== undefined ? parameters.parent : document.body;
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id = parameters.id !== undefined ? parameters.id : 'oldie';
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element = this.getWebGLErrorMessage();
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element.id = id;
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parent.appendChild(element);
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}
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};
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