1/*
2 * Copyright (C) 2010, 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#ifndef DisplayRefreshMonitorManager_h
27#define DisplayRefreshMonitorManager_h
28
29#if USE(REQUEST_ANIMATION_FRAME_DISPLAY_MONITOR)
30
31#include "DisplayRefreshMonitor.h"
32#include "PlatformScreen.h"
33#include <wtf/HashMap.h>
34#include <wtf/NeverDestroyed.h>
35#include <wtf/RefPtr.h>
36
37namespace WebCore {
38
39class DisplayRefreshMonitorManager {
40    friend class NeverDestroyed<DisplayRefreshMonitorManager>;
41public:
42    static DisplayRefreshMonitorManager& sharedManager();
43
44    void registerClient(DisplayRefreshMonitorClient*);
45    void unregisterClient(DisplayRefreshMonitorClient*);
46
47    bool scheduleAnimation(DisplayRefreshMonitorClient*);
48    void windowScreenDidChange(PlatformDisplayID, DisplayRefreshMonitorClient*);
49
50private:
51    friend class DisplayRefreshMonitor;
52    void displayDidRefresh(DisplayRefreshMonitor*);
53
54    DisplayRefreshMonitorManager() { }
55    virtual ~DisplayRefreshMonitorManager();
56
57    DisplayRefreshMonitor* ensureMonitorForClient(DisplayRefreshMonitorClient*);
58
59    // We know nothing about the values of PlatformDisplayIDs, so use UnsignedWithZeroKeyHashTraits.
60    // FIXME: Since we know nothing about these values, this is not sufficient.
61    // Even with UnsignedWithZeroKeyHashTraits, there are still two special values used for empty and deleted hash table slots.
62    typedef HashMap<uint64_t, RefPtr<DisplayRefreshMonitor>, WTF::IntHash<uint64_t>, WTF::UnsignedWithZeroKeyHashTraits<uint64_t>> DisplayRefreshMonitorMap;
63    DisplayRefreshMonitorMap m_monitors;
64};
65
66}
67
68#endif // USE(REQUEST_ANIMATION_FRAME_DISPLAY_MONITOR)
69
70#endif
71