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// Copyright (c) 2012 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_COMPOSITOR_COMPOSITOR_OBSERVER_H_
#define UI_COMPOSITOR_COMPOSITOR_OBSERVER_H_
#pragma once
#include "ui/compositor/compositor_export.h"
namespace ui {
class Compositor;
// A compositor observer is notified when compositing completes.
class COMPOSITOR_EXPORT CompositorObserver {
public:
// Called when compositing started: it has taken all the layer changes into
// account and has issued the graphics commands.
virtual void OnCompositingStarted(Compositor* compositor) = 0;
// Called when compositing completes: the present to screen has completed.
virtual void OnCompositingEnded(Compositor* compositor) = 0;
protected:
virtual ~CompositorObserver() {}
};
} // namespace ui
#endif // UI_COMPOSITOR_COMPOSITOR_OBSERVER_H_
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