Add support for GL_CHROMIUM_renderbuffer_format_BGRA8888

src/gpu/gl/GrGLCaps.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "GrGLCaps.h"
 #include "GrGLContext.h"
@@ skipping 388 matching lines @@
 
     if (this->fRGBA8RenderbufferSupport) {
         fConfigRenderSupport[kRGBA_8888_GrPixelConfig][kNo_MSAA]  = true;
         fConfigRenderSupport[kRGBA_4444_GrPixelConfig][kYes_MSAA]  = false;
     }
 
     if (this->fBGRAFormatSupport) {
         fConfigRenderSupport[kBGRA_8888_GrPixelConfig][kNo_MSAA]  = true;
         // The GL_EXT_texture_format_BGRA8888 extension does not add BGRA to the list of
         // configs that are color-renderable and can be passed to glRenderBufferStorageMultisample.
-        fConfigRenderSupport[kBGRA_8888_GrPixelConfig][kYes_MSAA] =
-            !fBGRAIsInternalFormat || !this->usesMSAARenderBuffers();
+        // Chromium may have an extension to allow BGRA renderbuffers to work on desktop platforms.
+        if (ctxInfo.extensions().has("GL_CHROMIUM_renderbuffer_format_BGRA8888")) {
+            fConfigRenderSupport[kBGRA_8888_GrPixelConfig][kYes_MSAA] = true;
+        } else {
+            fConfigRenderSupport[kBGRA_8888_GrPixelConfig][kYes_MSAA] =
+                !fBGRAIsInternalFormat || !this->usesMSAARenderBuffers();
+        }
     }
 
     // If we don't support MSAA then undo any places above where we set a config as renderable with
     // msaa.
     if (kNone_MSFBOType == fMSFBOType) {
         for (int i = 0; i < kGrPixelConfigCnt; ++i) {
             fConfigRenderSupport[i][kYes_MSAA] = false;
         }
     }
 }
@@ skipping 225 matching lines @@
     GrPrintf("GL_R support: %s\n", (fTextureRedSupport ? "YES": "NO"));
     GrPrintf("GL_ARB_imaging support: %s\n", (fImagingSupport ? "YES": "NO"));
     GrPrintf("Two Format Limit: %s\n", (fTwoFormatLimit ? "YES": "NO"));
     GrPrintf("Fragment coord conventions support: %s\n",
              (fFragCoordsConventionSupport ? "YES": "NO"));
     GrPrintf("Vertex array object support: %s\n", (fVertexArrayObjectSupport ? "YES": "NO"));
     GrPrintf("Use non-VBO for dynamic data: %s\n",
              (fUseNonVBOVertexAndIndexDynamicData ? "YES" : "NO"));
     GrPrintf("Discard FrameBuffer support: %s\n", (fDiscardFBSupport ? "YES" : "NO"));
 }