/* * Copyright (C) 2010, 2014 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #pragma once #include "PlatformScreen.h" #include <wtf/Forward.h> #include <wtf/Optional.h> namespace WebCore { class DisplayRefreshMonitor; class DisplayRefreshMonitorClient { public: DisplayRefreshMonitorClient(); virtual ~DisplayRefreshMonitorClient(); // Always called on the main thread. virtual void displayRefreshFired() = 0; virtual RefPtr<DisplayRefreshMonitor> createDisplayRefreshMonitor(PlatformDisplayID) const = 0; PlatformDisplayID displayID() const { return m_displayID.value(); } bool hasDisplayID() const { return !!m_displayID; } void setDisplayID(PlatformDisplayID displayID) { m_displayID = displayID; } void setIsScheduled(bool isScheduled) { m_scheduled = isScheduled; } bool isScheduled() const { return m_scheduled; } void fireDisplayRefreshIfNeeded(); private: bool m_scheduled { false }; Optional<PlatformDisplayID> m_displayID; }; }