IntRect TextureMapperLayer::intermediateSurfaceRect(const TransformationMatrix& matrix)
{
IntRect rect;
TransformationMatrix localTransform = TransformationMatrix(matrix).multiply(m_transform.combined());
rect = enclosingIntRect(localTransform.mapRect(layerRect()));
if (!m_state.masksToBounds && !m_state.maskLayer) {
for (size_t i = 0; i < m_children.size(); ++i)
rect.unite(m_children[i]->intermediateSurfaceRect(matrix));
}
#if ENABLE(CSS_FILTERS)
if (m_filters.hasOutsets()) {
int leftOutset;
int topOutset;
int bottomOutset;
int rightOutset;
m_filters.getOutsets(topOutset, rightOutset, bottomOutset, leftOutset);
IntRect unfilteredTargetRect(rect);
rect.move(std::max(0, -leftOutset), std::max(0, -topOutset));
rect.expand(leftOutset + rightOutset, topOutset + bottomOutset);
rect.unite(unfilteredTargetRect);
}
#endif
if (m_state.replicaLayer)
rect.unite(m_state.replicaLayer->intermediateSurfaceRect(matrix));
return rect;
}
void TextureMapperLayer::computeOverlapRegions(Region& overlapRegion, Region& nonOverlapRegion, ResolveSelfOverlapMode mode)
{
if (!m_state.visible || !m_state.contentsVisible)
return;
FloatRect boundingRect;
if (m_backingStore || m_state.masksToBounds || m_state.maskLayer || hasFilters())
boundingRect = layerRect();
else if (m_contentsLayer || m_state.solidColor.alpha())
boundingRect = m_state.contentsRect;
if (m_currentFilters.hasOutsets()) {
FilterOutsets outsets = m_currentFilters.outsets();
IntRect unfilteredTargetRect(boundingRect);
boundingRect.move(std::max(0, -outsets.left()), std::max(0, -outsets.top()));
boundingRect.expand(outsets.left() + outsets.right(), outsets.top() + outsets.bottom());
boundingRect.unite(unfilteredTargetRect);
}
TransformationMatrix replicaMatrix;
if (m_state.replicaLayer) {
replicaMatrix = replicaTransform();
boundingRect.unite(replicaMatrix.mapRect(boundingRect));
}
boundingRect = m_currentTransform.combined().mapRect(boundingRect);
// Count all masks and filters as overlap layers.
if (hasFilters() || m_state.maskLayer || (m_state.replicaLayer && m_state.replicaLayer->m_state.maskLayer)) {
Region newOverlapRegion(enclosingIntRect(boundingRect));
nonOverlapRegion.subtract(newOverlapRegion);
overlapRegion.unite(newOverlapRegion);
return;
}
Region newOverlapRegion;
Region newNonOverlapRegion(enclosingIntRect(boundingRect));
if (!m_state.masksToBounds) {
for (auto* child : m_children)
child->computeOverlapRegions(newOverlapRegion, newNonOverlapRegion, ResolveSelfOverlapIfNeeded);
}
if (m_state.replicaLayer) {
newOverlapRegion.unite(replicaMatrix.mapRect(newOverlapRegion.bounds()));
Region replicaRegion(replicaMatrix.mapRect(newNonOverlapRegion.bounds()));
resolveOverlaps(replicaRegion, newOverlapRegion, newNonOverlapRegion);
}
if ((mode != ResolveSelfOverlapAlways) && shouldBlend()) {
newNonOverlapRegion.unite(newOverlapRegion);
newOverlapRegion = Region();
}
overlapRegion.unite(newOverlapRegion);
resolveOverlaps(newNonOverlapRegion, overlapRegion, nonOverlapRegion);
}
static PassRefPtr<BitmapTexture> applyFilters(const FilterOperations& filters, TextureMapper* textureMapper, BitmapTexture* source, IntRect& targetRect)
{
if (!filters.size())
return source;
RefPtr<BitmapTexture> filterSurface(source);
int leftOutset, topOutset, bottomOutset, rightOutset;
if (filters.hasOutsets()) {
filters.getOutsets(topOutset, rightOutset, bottomOutset, leftOutset);
IntRect unfilteredTargetRect(targetRect);
targetRect.move(std::max(0, -leftOutset), std::max(0, -topOutset));
targetRect.expand(leftOutset + rightOutset, topOutset + bottomOutset);
targetRect.unite(unfilteredTargetRect);
filterSurface = textureMapper->acquireTextureFromPool(targetRect.size());
}
return filterSurface->applyFilters(*source, filters);
}