Switched off antialiasing by default for WebGL contexts.

Allowed customization of context attributes through Browser.createContext().

1 files changed, 15 insertions, 5 deletions

diff --git a/src/library_browser.js b/src/library_browser.js
index dd60a581..1c2f2e7f 100644
--- a/src/library_browser.js
+++ b/src/library_browser.js
@@ -225,7 +225,7 @@ mergeInto(LibraryManager.library, {
       }
     },
 
-    createContext: function(canvas, useWebGL, setInModule) {
+    createContext: function(canvas, useWebGL, setInModule, webGLContextAttributes) {
 #if !USE_TYPED_ARRAYS
       if (useWebGL) {
         Module.print('(USE_TYPED_ARRAYS needs to be enabled for WebGL)');
@@ -235,12 +235,22 @@ mergeInto(LibraryManager.library, {
       var ctx;
       try {
         if (useWebGL) {
-          ctx = canvas.getContext('experimental-webgl', {
+          var contextAttributes = {
+            antialias: false,
+            alpha: false
+          };
+
+          if (webGLContextAttributes) {
+            for (var attribute in webGLContextAttributes) {
+              contextAttributes[attribute] = webGLContextAttributes[attribute];
+            }
+          }
+
 #if GL_TESTING
-            preserveDrawingBuffer: true,
+          contextAttributes.preserveDrawingBuffer = true
 #endif
-            alpha: false
-          });
+
+          ctx = canvas.getContext('experimental-webgl', contextAttributes);
         } else {
           ctx = canvas.getContext('2d');
         }