Mac Overlays: Wire up overlays on Mac

content/browser/compositor/gpu_process_transport_factory.cc

 // Copyright 2014 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 "content/browser/compositor/gpu_process_transport_factory.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 259 matching lines @@
         compositor->vsync_manager()));
   } else {
     DCHECK(context_provider);
     ContextProvider::Capabilities capabilities =
         context_provider->ContextCapabilities();
     if (!data->surface_id) {
       surface = make_scoped_ptr(new OffscreenBrowserCompositorOutputSurface(
           context_provider, compositor->vsync_manager(),
           scoped_ptr<BrowserCompositorOverlayCandidateValidator>()));
     } else if (capabilities.gpu.surfaceless) {
+      GLenum target = GL_TEXTURE_2D;
+      GLenum format = GL_RGB;
+#if defined(OS_MACOSX)
+      target = GL_TEXTURE_RECTANGLE_ARB;
+      format = GL_BGRA_EXT;
+#endif
       surface =
           make_scoped_ptr(new GpuSurfacelessBrowserCompositorOutputSurface(
               context_provider, data->surface_id, compositor->vsync_manager(),
-              CreateOverlayCandidateValidator(compositor->widget()),
-              GL_TEXTURE_2D, GL_RGB, BrowserGpuMemoryBufferManager::current()));
+              CreateOverlayCandidateValidator(compositor->widget()), target,
+              format, BrowserGpuMemoryBufferManager::current()));
     } else {
-      surface = make_scoped_ptr(new GpuBrowserCompositorOutputSurface(
-          context_provider, compositor->vsync_manager(),
-          CreateOverlayCandidateValidator(compositor->widget())));
+      if (!surface) {
+        surface = make_scoped_ptr(new GpuBrowserCompositorOutputSurface(
+            context_provider, compositor->vsync_manager(),
+            CreateOverlayCandidateValidator(compositor->widget())));
+      }
     }
   }
 
   // TODO(piman): Use GpuSurfaceTracker to map ids to surfaces instead of an
   // output_surface_map_ here.
   output_surface_map_.AddWithID(surface.get(), data->surface_id);
   data->surface = surface.get();
   if (data->reflector)
     data->reflector->OnSourceSurfaceReady(data->surface);
 
@@ skipping 288 matching lines @@
   FOR_EACH_OBSERVER(ImageTransportFactoryObserver,
                     observer_list_,
                     OnLostResources());
 
   // Kill things that use the shared context before killing the shared context.
   lost_gl_helper.reset();
   lost_shared_main_thread_contexts  = NULL;
 }
 
 }  // namespace content