check for webgl support by creating a context

fix #677
mapbox · Aug 8, 2014 · 152c058 · 152c058
1 parent 5efd3a1
commit 152c058
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/js/util/browser/browser.js b/js/util/browser/browser.js
@@ -88,7 +88,8 @@ exports.supported = function() {
             if ('supportsContext' in canvas) {
                 return canvas.supportsContext('webgl') || canvas.supportsContext('experimental-webgl');
             }
-            return !!window.WebGLRenderingContext;
+            return !!window.WebGLRenderingContext &&
+                (!!canvas.getContext('webgl') || !!canvas.getContext('experimental-webgl'));
         },
 
         function() { return 'Worker' in window; }