GetNativeImageDataFormat: Return PP_IMAGEDATAFORMAT_RGBA_PREMUL in the case of SK_R32_SHIFT == 0 (…

ppapi/shared_impl/ppb_image_data_shared.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ppapi/shared_impl/ppb_image_data_shared.h"
 
 #include "base/logging.h"
 #include "build/build_config.h"
 
 #if !defined(OS_NACL) && !defined(NACL_WIN64)
 #include "third_party/skia/include/core/SkTypes.h"
 #endif
 
 namespace ppapi {
 
 // static
 PP_ImageDataFormat PPB_ImageData_Shared::GetNativeImageDataFormat() {
 #if defined(OS_NACL)
   // In NaCl, just default to something. If we're wrong, it will be converted
   // later.
   // TODO(dmichael): Really proxy this.
   return PP_IMAGEDATAFORMAT_BGRA_PREMUL;
 #elif defined(NACL_WIN64)
   // In the NaCl Win64 helper, this shouldn't be called. If we start building
   // Chrome on Windows 64 for realz, we should really implement this.
   NOTIMPLEMENTED();
   return PP_IMAGEDATAFORMAT_BGRA_PREMUL;
 #else
-  return PP_IMAGEDATAFORMAT_BGRA_PREMUL;
+  if (SK_B32_SHIFT == 0)
+    return PP_IMAGEDATAFORMAT_BGRA_PREMUL;
+  else if (SK_R32_SHIFT == 0)
+    return PP_IMAGEDATAFORMAT_RGBA_PREMUL;
+  else
+    return PP_IMAGEDATAFORMAT_BGRA_PREMUL; // Default to something on failure
 #endif
 }
 
 // static
 PP_Bool PPB_ImageData_Shared::IsImageDataFormatSupported(
     PP_ImageDataFormat format) {
   return PP_FromBool(format == PP_IMAGEDATAFORMAT_BGRA_PREMUL ||
                      format == PP_IMAGEDATAFORMAT_RGBA_PREMUL);
 }
 
 // static
 PP_Bool PPB_ImageData_Shared::IsImageDataDescValid(
     const PP_ImageDataDesc& desc) {
   return PP_FromBool(IsImageDataFormatSupported(desc.format) &&
                      desc.size.width > 0 &&
                      desc.size.height > 0 &&
                      desc.stride > 0);
 }
 
 }  // namespace ppapi