bool CompositingCoordinator::flushPendingLayerChanges()
{
TemporaryChange<bool> protector(m_isFlushingLayerChanges, true);
initializeRootCompositingLayerIfNeeded();
m_rootLayer->flushCompositingStateForThisLayerOnly();
m_client->didFlushRootLayer();
bool didSync = m_page->mainFrame().view()->flushCompositingStateIncludingSubframes();
toCoordinatedGraphicsLayer(m_rootLayer.get())->updateContentBuffersIncludingSubLayers();
toCoordinatedGraphicsLayer(m_rootLayer.get())->syncPendingStateChangesIncludingSubLayers();
flushPendingImageBackingChanges();
if (m_shouldSyncFrame) {
didSync = true;
if (m_rootCompositingLayer) {
m_state.contentsSize = roundedIntSize(m_rootCompositingLayer->size());
if (CoordinatedGraphicsLayer* contentsLayer = mainContentsLayer())
m_state.coveredRect = contentsLayer->coverRect();
}
m_state.scrollPosition = m_visibleContentsRect.location();
m_client->commitSceneState(m_state);
clearPendingStateChanges();
m_shouldSyncFrame = false;
}
return didSync;
}
void CompositingCoordinator::setVisibleContentsRect(const FloatRect& rect, const FloatPoint& trajectoryVector)
{
// A zero trajectoryVector indicates that tiles all around the viewport are requested.
if (CoordinatedGraphicsLayer* contentsLayer = mainContentsLayer())
contentsLayer->setVisibleContentRectTrajectoryVector(trajectoryVector);
bool contentsRectDidChange = rect != m_visibleContentsRect;
if (contentsRectDidChange) {
m_visibleContentsRect = rect;
for (auto& registeredLayer : m_registeredLayers.values())
registeredLayer->setNeedsVisibleRectAdjustment();
}
FrameView* view = m_page->mainFrame().view();
if (view->useFixedLayout() && contentsRectDidChange) {
// Round the rect instead of enclosing it to make sure that its size stays
// the same while panning. This can have nasty effects on layout.
view->setFixedVisibleContentRect(roundedIntRect(rect));
}
}
