1/*
2 * Copyright (C) 2014 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. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#import "config.h"
27#import "RemoteLayerTreeDisplayRefreshMonitor.h"
28
29#if USE(REQUEST_ANIMATION_FRAME_DISPLAY_MONITOR)
30
31#import <wtf/CurrentTime.h>
32
33using namespace WebCore;
34
35namespace WebKit {
36
37RemoteLayerTreeDisplayRefreshMonitor::RemoteLayerTreeDisplayRefreshMonitor(PlatformDisplayID displayID, RemoteLayerTreeDrawingArea& drawingArea)
38    : DisplayRefreshMonitor(displayID)
39    , m_drawingArea(drawingArea)
40{
41}
42
43RemoteLayerTreeDisplayRefreshMonitor::~RemoteLayerTreeDisplayRefreshMonitor()
44{
45    m_drawingArea.willDestroyDisplayRefreshMonitor(this);
46}
47
48bool RemoteLayerTreeDisplayRefreshMonitor::requestRefreshCallback()
49{
50    if (!isActive())
51        return false;
52
53    if (!isScheduled())
54        static_cast<DrawingArea&>(m_drawingArea).scheduleCompositingLayerFlush();
55
56    setIsActive(true);
57    setIsScheduled(true);
58    return true;
59}
60
61void RemoteLayerTreeDisplayRefreshMonitor::didUpdateLayers()
62{
63    setIsScheduled(false);
64
65    if (!isPreviousFrameDone())
66        return;
67
68    setIsPreviousFrameDone(false);
69    setMonotonicAnimationStartTime(monotonicallyIncreasingTime());
70
71    handleDisplayRefreshedNotificationOnMainThread(this);
72}
73
74}
75
76#endif // USE(REQUEST_ANIMATION_FRAME_DISPLAY_MONITOR)
77