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/*
* Copyright (C) 2025 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. 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 "AcceleratedTimelinesUpdater.h"
#if ENABLE(THREADED_ANIMATIONS)
#include "ScrollTimeline.h"
namespace WebCore {
void AcceleratedTimelinesUpdater::scrollTimelineDidChange(ScrollTimeline& timeline)
{
m_scrollTimelinesPendingUpdate.add(timeline);
}
void AcceleratedTimelinesUpdater::processTimelinesSeenDuringEffectStacksUpdate(HashSet<Ref<AcceleratedTimeline>>&& timelinesInUpdate)
{
for (auto& timeline : timelinesInUpdate) {
auto& timelineIdentifier = timeline->identifier();
auto addResult = m_timelines.add(timelineIdentifier, timeline.ptr());
if (addResult.isNewEntry)
m_timelinesUpdate.created.add(timeline);
}
}
AcceleratedTimelinesUpdate AcceleratedTimelinesUpdater::takeTimelinesUpdate()
{
// All known accelerated timelines that got destroyed since the last update
// will now be null references. Add them to the list of destroyed timelines.
for (auto& [timelineIdentifier, timeline] : m_timelines) {
if (!timeline)
m_timelinesUpdate.destroyed.add(timelineIdentifier);
}
// Prune all those destroyed timelines from our list of known accelerated timelines.
for (auto& identifierToRemove : m_timelinesUpdate.destroyed)
m_timelines.remove(identifierToRemove);
// Finally, process all timelines that were marked as requiring an update, either
// marking them as modified or destroyed if they no longer are accelerated.
auto scrollTimelinesPendingUpdate = std::exchange(m_scrollTimelinesPendingUpdate, { });
for (auto& scrollTimeline : scrollTimelinesPendingUpdate) {
auto timelineIdentifier = scrollTimeline->acceleratedTimelineIdentifier();
auto acceleratedTimeline = m_timelines.getOptional(timelineIdentifier);
if (acceleratedTimeline && scrollTimeline->canBeAccelerated()) {
ASSERT(*acceleratedTimeline);
scrollTimeline->updateAcceleratedRepresentation();
m_timelinesUpdate.modified.add(**acceleratedTimeline);
} else
m_timelinesUpdate.destroyed.add(timelineIdentifier);
}
return std::exchange(m_timelinesUpdate, { });
}
} // namespace WebCore
#endif // ENABLE(THREADED_ANIMATIONS)
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