Plumbed in discard_framebuffer extension

src/gpu/gl/GrGLInterface.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "gl/GrGLInterface.h"
 #include "gl/GrGLExtensions.h"
@@ skipping 277 matching lines @@
             if (NULL == fTexStorage2D) {
                 return false;
             }
         }
     } else if (extensions.has("GL_EXT_texture_storage")) {
         if (NULL == fTexStorage2D) {
             return false;
         }
     }
 
+    if (extensions.has("GL_EXT_discard_framebuffer")) {

[bsalomon, 2013/04/29 14:42:15]

Might be worth checking if Chrome passes along this extension. If not, we need
to get it. If so we have to skip this check until Chrome gives us the ptr.

[robertphillips, 2013/04/29 15:25:39]

Done.

+        if (NULL == fDiscardFramebuffer) {
+            return false;
+        }
+    }
+
     // FBO MSAA
     if (kDesktop_GrGLBinding == binding) {
         // GL 3.0 and the ARB extension have multisample + blit
         if (glVer >= GR_GL_VER(3,0) || extensions.has("GL_ARB_framebuffer_object")) {
             if (NULL == fRenderbufferStorageMultisample ||
                 NULL == fBlitFramebuffer) {
                 return false;
             }
         } else {
             if (extensions.has("GL_EXT_framebuffer_blit") &&
@@ skipping 63 matching lines @@
             if (NULL == fBindVertexArray ||
                 NULL == fDeleteVertexArrays ||
                 NULL == fGenVertexArrays) {
                 return false;
             }
         }
     }
 
     return true;
 }