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Improve type checking in WebGL support test

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This commit is contained in:
Tom Payne
2013-12-04 11:59:29 +01:00
parent d6dc1a2c6f
commit 0d3583bd8d
1 changed files with 18 additions and 14 deletions
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32
src/ol/webgl/webgl.js
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@@ -52,17 +52,21 @@ ol.webgl.getContext = function(canvas, opt_attributes) {
* @const
* @type {boolean}
*/
ol.webgl.SUPPORTED = (function() {
if (!('WebGLRenderingContext' in goog.global)) {
return false;
}
try {
var canvas = /** @type {HTMLCanvasElement} */
(goog.dom.createElement(goog.dom.TagName.CANVAS));
return !goog.isNull(ol.webgl.getContext(canvas, {
failIfMajorPerformanceCaveat: true
}));
} catch (e) {
return false;
}
})();
ol.webgl.SUPPORTED = (
/**
* @return {boolean} WebGL supported.
*/
function() {
if (!('WebGLRenderingContext' in goog.global)) {
return false;
}
try {
var canvas = /** @type {HTMLCanvasElement} */
(goog.dom.createElement(goog.dom.TagName.CANVAS));
return !goog.isNull(ol.webgl.getContext(canvas, {
failIfMajorPerformanceCaveat: true
}));
} catch (e) {
return false;
}
})();