IntRect CoordinatedGraphicsLayer::tiledBackingStoreVisibleRect()
{
// Non-invertible layers are not visible.
if (!m_layerTransform.combined().isInvertible())
return IntRect();
// Return a projection of the visible rect (surface coordinates) onto the layer's plane (layer coordinates).
// The resulting quad might be squewed and the visible rect is the bounding box of this quad,
// so it might spread further than the real visible area (and then even more amplified by the cover rect multiplier).
ASSERT(m_cachedInverseTransform == m_layerTransform.combined().inverse());
FloatRect rect = m_cachedInverseTransform.clampedBoundsOfProjectedQuad(FloatQuad(m_coordinator->visibleContentsRect()));
clampToContentsRectIfRectIsInfinite(rect, tiledBackingStoreContentsRect());
return enclosingIntRect(rect);
}
IntRect WebGraphicsLayer::tiledBackingStoreVisibleRect()
{
if (!shouldUseTiledBackingStore())
return tiledBackingStoreContentsRect();
// Non-invertible layers are not visible.
if (!m_layerTransform.combined().isInvertible())
return IntRect();
// Return a projection of the visible rect (surface coordinates) onto the layer's plane (layer coordinates).
// The resulting quad might be squewed and the visible rect is the bounding box of this quad,
// so it might spread further than the real visible area (and then even more amplified by the cover rect multiplier).
return m_layerTransform.combined().inverse().clampedBoundsOfProjectedQuad(FloatQuad(FloatRect(m_webGraphicsLayerClient->visibleContentsRect())));
}
bool CoordinatedGraphicsLayer::hasPendingVisibleChanges()
{
if (opacity() < 0.01 && !m_animations.hasActiveAnimationsOfType(AnimatedPropertyOpacity))
return false;
for (size_t i = 0; i < children().size(); ++i) {
if (toCoordinatedGraphicsLayer(children()[i])->hasPendingVisibleChanges())
return true;
}
bool shouldSyncCanvas = false;
#if USE(GRAPHICS_SURFACE)
shouldSyncCanvas = m_pendingCanvasOperation & SyncCanvas;
#endif
if (!m_shouldSyncLayerState && !m_shouldSyncChildren && !m_shouldSyncFilters && !m_shouldSyncImageBacking && !m_shouldSyncAnimations && !shouldSyncCanvas)
return false;
return tiledBackingStoreVisibleRect().intersects(tiledBackingStoreContentsRect());
}
