Propagate supported scanout formats from driver to SurfaceFactoryOzone.

ui/ozone/platform/drm/gpu/drm_thread.h

 // Copyright 2015 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.
 
 #ifndef UI_OZONE_PLATFORM_DRM_GPU_DRM_THREAD_H_
 #define UI_OZONE_PLATFORM_DRM_GPU_DRM_THREAD_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
@@ skipping 41 matching lines @@
 
   void Start();
 
   // Must be called on the DRM thread.
   void CreateBuffer(gfx::AcceleratedWidget widget,
                     const gfx::Size& size,
                     gfx::BufferFormat format,
                     gfx::BufferUsage usage,
                     scoped_refptr<GbmBuffer>* buffer);
 
+  void GetSupportedFormats(std::vector<uint32_t>* support_formats);

[spang, 2016/01/20 18:52:24]

Document what the uint32_t means.

In fact, could this API just use gfx::BufferFormat?

[william.xie, 2016/01/21 02:14:02]

Done.

   void SchedulePageFlip(gfx::AcceleratedWidget widget,
                         const std::vector<OverlayPlane>& planes,
                         const SwapCompletionCallback& callback);
   void GetVSyncParameters(
       gfx::AcceleratedWidget widget,
       const gfx::VSyncProvider::UpdateVSyncCallback& callback);
 
   void CreateWindow(gfx::AcceleratedWidget widget);
   void DestroyWindow(gfx::AcceleratedWidget widget);
   void SetWindowBounds(gfx::AcceleratedWidget widget, const gfx::Rect& bounds);
@@ skipping 40 matching lines @@
   scoped_ptr<ScanoutBufferGenerator> buffer_generator_;
   scoped_ptr<ScreenManager> screen_manager_;
   scoped_ptr<DrmGpuDisplayManager> display_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(DrmThread);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_GPU_DRM_THREAD_H_