From 152c058ff53716a806f24a2d34e0d27256704fb5 Mon Sep 17 00:00:00 2001
From: Ansis Brammanis <brammanis@gmail.com>
Date: Fri, 8 Aug 2014 16:33:48 -0700
Subject: [PATCH] check for webgl support by creating a context

fix #677
---
 js/util/browser/browser.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/js/util/browser/browser.js b/js/util/browser/browser.js
index 19a0252e314..ca7f009b77e 100644
--- 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; }