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New OpenLayers.CANVAS_SUPPORTED constant

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This commit is contained in:
fredj
2012-01-18 14:03:25 +01:00
parent 2c0b13957e
commit 14624cb815
2 changed files with 10 additions and 2 deletions
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3
lib/OpenLayers/Renderer/Canvas.js
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@@ -110,8 +110,7 @@ OpenLayers.Renderer.Canvas = OpenLayers.Class(OpenLayers.Renderer, {
* {Boolean} Whether or not the browser supports the renderer class
*/
supported: function() {
var canvas = document.createElement("canvas");
return !!canvas.getContext;
return OpenLayers.CANVAS_SUPPORTED;
},
/**

9
lib/OpenLayers/Util.js
View File

@@ -1435,6 +1435,15 @@ OpenLayers.IS_GECKO = (function() {
return ua.indexOf("webkit") == -1 && ua.indexOf("gecko") != -1;
})();
/**
* Constant: CANVAS_SUPPORTED
* {Boolean} True if canvas 2d is supported.
*/
OpenLayers.CANVAS_SUPPORTED = (function() {
var elem = document.createElement('canvas');
return !!(elem.getContext && elem.getContext('2d'));
})();
/**
* Constant: BROWSER_NAME
* {String}