commit 702eb9622102599d94ab6798e6227cf29f48c2d3
author robertphillips <robertphillips@google.com> Tue Dec 16 07:27:30 2014 -0800
committer Commit bot <commit-bot@chromium.org> Tue Dec 16 07:27:30 2014 -0800
tree 4f89d2bd00efba8a11df210765efa3ea3303a6ff
parent 9a5380dd358a9c559a41beef7cb368cd7f0ca51f

Fix layer hoisting image filter corner cases

This CL fixes 5 bugs related to hoisting image filters:

For image filters the src layer (the one prior to filtering) often needs to be
smaller then the final layer. This requires the saveLayer's optional bounds
to be stored (in SkLayerInfo.h and SkRecordDraw.cpp) and then used in
compute_source_rect and carried around in GrCachedLayer.

The image filters can add an extra offset to the final draw operation.
This is now computed in GrLayerHoister::FilterLayer and  carried around in
GrCachedLayer.

Filtered layers must use exact matches. This is now done in GrLayerCache::lock.

The filter cache requires a valid matrix so it can compute the correct offset.
This is now done in GrLayerHoister::FilterLayer.

Filtered layers need to be drawn with drawSprite while unfiltered (and therefore
hopefully atlased) layers can be drawn with drawBitmap. This is now done in
draw_replacement_bitmap.

Review URL: https://codereview.chromium.org/803183003