cc/scheduler/video_frame_controller.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CC_SCHEDULER_VIDEO_FRAME_CONTROLLER_H_
   6 #define CC_SCHEDULER_VIDEO_FRAME_CONTROLLER_H_
   7
   8 #include "cc/base/cc_export.h"
   9 #include "cc/output/begin_frame_args.h"
  10
  11 namespace cc {
  12
  13 class VideoFrameController;
  14
  15 class CC_EXPORT VideoFrameControllerClient {
  16  public:
  17   virtual void AddVideoFrameController(VideoFrameController* controller) = 0;
  18   virtual void RemoveVideoFrameController(VideoFrameController* controller) = 0;
  19
  20  protected:
  21   virtual ~VideoFrameControllerClient() {}
  22 };
  23
  24 // TODO(sunnyps): Consider making this a BeginFrameObserver some day.
  25 class CC_EXPORT VideoFrameController {
  26  public:
  27   virtual void OnBeginFrame(const BeginFrameArgs& args) = 0;
  28
  29   // Called upon completion of LayerTreeHostImpl::DidDrawAllLayers(), regardless
  30   // of whether the controller issued a SetNeedsRedraw().  May be used to
  31   // determine when SetNeedsRedraw() is called but the draw is aborted.
  32   virtual void DidDrawFrame() = 0;
  33
  34  protected:
  35   virtual ~VideoFrameController() {}
  36 };
  37
  38 }  // namespace cc
  39
  40 #endif  // CC_SCHEDULER_VIDEO_FRAME_CONTROLLER_H_