Robert O'Callahan d56dfa741e Bug 513082. Instead of passing aDirtyRect to nsDisplayItem::Paint, have nsDisplayList::OptimizeVisibility (renamed to ComputeVisibility) compute the intersection of the visible region with the bounds of each display item and store the result in the item's mVisibleRect. This lets us do less work to paint display items which have a small intersection with the visible region but a large intersection with the bounding-box of the visible region. r=dbaron ... --HG-- extra : rebase_source : 76db4b87ef9e5a6e9de7677edc08c26e2cbc462e		2009-09-07 12:35:14 +12:00
..
src	Bug 513082. Instead of passing aDirtyRect to nsDisplayItem::Paint, have nsDisplayList::OptimizeVisibility (renamed to ComputeVisibility) compute the intersection of the visible region with the bounds of each display item and store the result in the item's mVisibleRect. This lets us do less work to paint display items which have a small intersection with the visible region but a large intersection with the bounding-box of the visible region. r=dbaron	2009-09-07 12:35:14 +12:00