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;
}
IntRect CCRenderSurface::computeReadbackDeviceBoundingBox(LayerRendererChromium* layerRenderer, const TransformationMatrix& drawTransform) const
{
IntRect deviceRect = computeDeviceBoundingBox(layerRenderer, drawTransform);
if (m_backgroundFilters.isEmpty())
return deviceRect;
int top, right, bottom, left;
m_backgroundFilters.getOutsets(top, right, bottom, left);
deviceRect.move(-left, -top);
deviceRect.expand(left + right, top + bottom);
return deviceRect;
}
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);
}