Source/WebCore/platform/graphics/DisplayRefreshMonitorClient.cpp

/*
 * 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. 
 */

#include "config.h"
#include "DisplayRefreshMonitorClient.h"

#include "DisplayRefreshMonitor.h"
#include "DisplayRefreshMonitorManager.h"

namespace WebCore {

DisplayRefreshMonitorClient::DisplayRefreshMonitorClient() = default;

DisplayRefreshMonitorClient::~DisplayRefreshMonitorClient()
{
    DisplayRefreshMonitorManager::sharedManager().unregisterClient(*this);
}

void DisplayRefreshMonitorClient::setPreferredFramesPerSecond(FramesPerSecond preferredFrameRate)
{
    if (preferredFrameRate == m_preferredFramesPerSecond)
        return;

    m_preferredFramesPerSecond = preferredFrameRate;
    DisplayRefreshMonitorManager::sharedManager().clientPreferredFramesPerSecondChanged(*this);
}

void DisplayRefreshMonitorClient::fireDisplayRefreshIfNeeded(const DisplayUpdate& displayUpdate)
{
    if (!m_scheduled)
        return;

    if (!displayUpdate.relevantForUpdateFrequency(m_preferredFramesPerSecond))
        return;

    m_scheduled = false;
    displayRefreshFired();
}

}