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/*
* Copyright (C) 2014 Igalia S.L.
*
* 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. AND ITS CONTRIBUTORS ``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 ITS 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 "ThreadedDisplayRefreshMonitor.h"
#if USE(COORDINATED_GRAPHICS_THREADED) && USE(REQUEST_ANIMATION_FRAME_DISPLAY_MONITOR)
#include "CompositingRunLoop.h"
#include "ThreadedCompositor.h"
#include <wtf/glib/RunLoopSourcePriority.h>
namespace WebKit {
ThreadedDisplayRefreshMonitor::ThreadedDisplayRefreshMonitor(ThreadedCompositor& compositor)
: WebCore::DisplayRefreshMonitor(0)
, m_displayRefreshTimer(RunLoop::main(), this, &ThreadedDisplayRefreshMonitor::displayRefreshCallback)
, m_compositor(&compositor)
{
#if USE(GLIB_EVENT_LOOP)
m_displayRefreshTimer.setPriority(RunLoopSourcePriority::DisplayRefreshMonitorTimer);
m_displayRefreshTimer.setName("[WebKit] ThreadedDisplayRefreshMonitor");
#endif
}
bool ThreadedDisplayRefreshMonitor::requestRefreshCallback()
{
if (!m_compositor)
return false;
bool previousFrameDone { false };
{
LockHolder locker(mutex());
setIsScheduled(true);
previousFrameDone = isPreviousFrameDone();
}
// Only request an update in case we're not currently handling the display
// refresh notifications under ThreadedDisplayRefreshMonitor::displayRefreshCallback().
// Any such schedule request is handled in that method after the notifications.
if (previousFrameDone)
m_compositor->requestDisplayRefreshMonitorUpdate();
return true;
}
bool ThreadedDisplayRefreshMonitor::requiresDisplayRefreshCallback()
{
LockHolder locker(mutex());
return isScheduled() && isPreviousFrameDone();
}
void ThreadedDisplayRefreshMonitor::dispatchDisplayRefreshCallback()
{
if (!m_compositor)
return;
m_displayRefreshTimer.startOneShot(0);
}
void ThreadedDisplayRefreshMonitor::invalidate()
{
m_displayRefreshTimer.stop();
m_compositor = nullptr;
}
void ThreadedDisplayRefreshMonitor::displayRefreshCallback()
{
bool shouldHandleDisplayRefreshNotification { false };
{
LockHolder locker(mutex());
shouldHandleDisplayRefreshNotification = isScheduled() && isPreviousFrameDone();
if (shouldHandleDisplayRefreshNotification)
setIsPreviousFrameDone(false);
}
if (shouldHandleDisplayRefreshNotification)
DisplayRefreshMonitor::handleDisplayRefreshedNotificationOnMainThread(this);
// Retrieve the scheduled status for this DisplayRefreshMonitor.
bool hasBeenRescheduled { false };
{
LockHolder locker(mutex());
hasBeenRescheduled = isScheduled();
}
// Notify the compositor about the completed DisplayRefreshMonitor update, passing
// along information about any schedule request that might have occurred during
// the notification handling.
if (m_compositor)
m_compositor->handleDisplayRefreshMonitorUpdate(hasBeenRescheduled);
}
} // namespace WebKit
#endif // USE(COORDINATED_GRAPHICS_THREADED) && USE(REQUEST_ANIMATION_FRAME_DISPLAY_MONITOR)
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