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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 * @const
* @type {boolean} * @type {boolean}
*/ */
ol.webgl.SUPPORTED = (function() { ol.webgl.SUPPORTED = (
if (!('WebGLRenderingContext' in goog.global)) { /**
return false; * @return {boolean} WebGL supported.
} */
try { function() {
var canvas = /** @type {HTMLCanvasElement} */ if (!('WebGLRenderingContext' in goog.global)) {
(goog.dom.createElement(goog.dom.TagName.CANVAS)); return false;
return !goog.isNull(ol.webgl.getContext(canvas, { }
failIfMajorPerformanceCaveat: true try {
})); var canvas = /** @type {HTMLCanvasElement} */
} catch (e) { (goog.dom.createElement(goog.dom.TagName.CANVAS));
return false; return !goog.isNull(ol.webgl.getContext(canvas, {
} failIfMajorPerformanceCaveat: true
})(); }));
} catch (e) {
return false;
}
})();