1/*
2 * Copyright (C) 2012 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef GraphicsLayerUpdater_h
27#define GraphicsLayerUpdater_h
28
29#include "DisplayRefreshMonitorClient.h"
30#include "PlatformScreen.h"
31
32namespace WebCore {
33
34class GraphicsLayerUpdater;
35
36class GraphicsLayerUpdaterClient {
37public:
38    virtual ~GraphicsLayerUpdaterClient() { }
39    virtual void flushLayersSoon(GraphicsLayerUpdater*) = 0;
40#if USE(REQUEST_ANIMATION_FRAME_DISPLAY_MONITOR)
41    virtual PassRefPtr<DisplayRefreshMonitor> createDisplayRefreshMonitor(PlatformDisplayID) const = 0;
42#endif
43};
44
45class GraphicsLayerUpdater
46#if USE(REQUEST_ANIMATION_FRAME_DISPLAY_MONITOR)
47    : public DisplayRefreshMonitorClient
48#endif
49{
50public:
51    GraphicsLayerUpdater(GraphicsLayerUpdaterClient*, PlatformDisplayID);
52    virtual ~GraphicsLayerUpdater();
53
54    void scheduleUpdate();
55    void screenDidChange(PlatformDisplayID);
56
57#if USE(REQUEST_ANIMATION_FRAME_DISPLAY_MONITOR)
58    virtual PassRefPtr<DisplayRefreshMonitor> createDisplayRefreshMonitor(PlatformDisplayID) const override;
59#endif
60
61private:
62    virtual void displayRefreshFired(double timestamp);
63
64    GraphicsLayerUpdaterClient* m_client;
65    bool m_scheduled;
66};
67
68} // namespace WebCore
69
70#endif // GraphicsLayerUpdater_h
71