android: Add basic support for Broadcom GPUs

gpu/command_buffer/service/async_pixel_transfer_delegate_android.cc

 // Copyright (c) 2013 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 "gpu/command_buffer/service/async_pixel_transfer_delegate.h"
 
 #include "base/debug/trace_event.h"
 #include "gpu/command_buffer/service/async_pixel_transfer_delegate_egl.h"
 #include "gpu/command_buffer/service/async_pixel_transfer_delegate_stub.h"
 #include "gpu/command_buffer/service/async_pixel_transfer_delegate_sync.h"
 #include "ui/gl/gl_context.h"
 #include "ui/gl/gl_implementation.h"
 
 namespace gpu {
+namespace {
+
+bool IsBroadcom() {
+  const char* vendor = reinterpret_cast<const char*>(glGetString(GL_VENDOR));
+  if (vendor)
+    return std::string(vendor).find("Broadcom") != std::string::npos;
+  return false;
+}
+
+}
 
 // We only used threaded uploads when we can:
 // - Create EGLImages out of OpenGL textures (EGL_KHR_gl_texture_2D_image)
 // - Bind EGLImages to OpenGL textures (GL_OES_EGL_image)
 // - Use fences (to test for upload completion).
 AsyncPixelTransferDelegate* AsyncPixelTransferDelegate::Create(
     gfx::GLContext* context) {
   TRACE_EVENT0("gpu", "AsyncPixelTransferDelegate::Create");
   switch (gfx::GetGLImplementation()) {
     case gfx::kGLImplementationEGLGLES2:
       DCHECK(context);
       if (context->HasExtension("EGL_KHR_fence_sync") &&
           context->HasExtension("EGL_KHR_image") &&
           context->HasExtension("EGL_KHR_image_base") &&
           context->HasExtension("EGL_KHR_gl_texture_2D_image") &&
-          context->HasExtension("GL_OES_EGL_image")) {
+          context->HasExtension("GL_OES_EGL_image") &&
+          !IsBroadcom()) {
         return new AsyncPixelTransferDelegateEGL;
       }
       LOG(INFO) << "Async pixel transfers not supported";
       return new AsyncPixelTransferDelegateSync;
     case gfx::kGLImplementationMockGL:
       return new AsyncPixelTransferDelegateStub;
     default:
       NOTREACHED();
       return NULL;
   }
 }
 
 }  // namespace gpu