ozone: support gfx::BufferFormat::RGBX_8888 as a native pixmap format.

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

 // 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.
 
 #ifndef UI_OZONE_PLATFORM_DRM_GPU_GBM_BUFFER_H_
 #define UI_OZONE_PLATFORM_DRM_GPU_GBM_BUFFER_H_
 
 #include "base/files/scoped_file.h"
 #include "base/macros.h"
 #include "ui/gfx/buffer_types.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/ozone/platform/drm/gpu/gbm_buffer_base.h"
 #include "ui/ozone/public/native_pixmap.h"
 
 struct gbm_bo;
 
 namespace ui {
 
 class GbmDevice;
 class GbmSurfaceFactory;
 
 class GbmBuffer : public GbmBufferBase {
  public:
   static scoped_refptr<GbmBuffer> CreateBuffer(
       const scoped_refptr<GbmDevice>& gbm,
       gfx::BufferFormat format,
       const gfx::Size& size,
       gfx::BufferUsage usage);
+  gfx::BufferFormat GetFormat() const { return format_; }
   gfx::BufferUsage GetUsage() const { return usage_; }
 
  private:
   GbmBuffer(const scoped_refptr<GbmDevice>& gbm,
             gbm_bo* bo,
+            gfx::BufferFormat format,
             gfx::BufferUsage usage);
   ~GbmBuffer() override;
 
+  gfx::BufferFormat format_;
   gfx::BufferUsage usage_;
 
   DISALLOW_COPY_AND_ASSIGN(GbmBuffer);
 };
 
 class GbmPixmap : public NativePixmap {
  public:
   explicit GbmPixmap(GbmSurfaceFactory* surface_manager);
   void Initialize(base::ScopedFD dma_buf, int dma_buf_pitch);
   bool InitializeFromBuffer(const scoped_refptr<GbmBuffer>& buffer);
@@ skipping 32 matching lines @@
   GbmSurfaceFactory* surface_manager_;
 
   ProcessingCallback processing_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(GbmPixmap);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_GPU_GBM_BUFFER_H_