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authorPhilip Sargent <philip.sargent@klebos.com>2021-04-02 19:02:10 +0100
committerPhilip Sargent <philip.sargent@klebos.com>2021-04-02 19:02:10 +0100
commit371542fb1eafb721fe44fe9fbed3f37f2aeafe5e (patch)
treed6460ba94ef0c951765e51b7d5610bc74f401054 /media/jslib/CaveView/lib/Detector.js
parentb71f2c4ebb61940ec85b61d7e4d8aa11338c280b (diff)
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Caveview enabled - local copy 3MB
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+/**
+ * @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;
+
+}