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