ozone: dri: Composite to intermediate surface & copy

ui/gfx/ozone/surface_ozone_canvas.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_GFX_OZONE_SURFACE_OZONE_CANVAS_H_
 #define UI_GFX_OZONE_SURFACE_OZONE_CANVAS_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "skia/ext/refptr.h"
@@ skipping 18 matching lines @@
   virtual skia::RefPtr<SkCanvas> GetCanvas() = 0;
 
   // Attempts to resize the canvas to match the viewport size. Returns true if
   // resizing was successful, otherwise false (platforms may require a fixed
   // size canvas). After resizing, the compositor must call GetCanvas() to get
   // the next canvas.
   virtual bool ResizeCanvas(const gfx::Size& viewport_size) = 0;
 
   // Present the current canvas. After presenting, the compositor must call
   // GetCanvas() to get the next canvas.
-  virtual bool PresentCanvas() = 0;
+  virtual bool PresentCanvas(const gfx::Rect& damage) = 0;
 
   // Returns a gfx::VsyncProvider for this surface. Note that this may be
   // called after we have entered the sandbox so if there are operations (e.g.
   // opening a file descriptor providing vsync events) that must be done
   // outside of the sandbox, they must have been completed in
   // InitializeHardware. Returns an empty scoped_ptr on error.
   virtual scoped_ptr<gfx::VSyncProvider> CreateVSyncProvider() = 0;
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_OZONE_SURFACE_OZONE_CANVAS_H_