Fix saveLayer() with a pixel-moving filter vs SkBBoxHierarchyRecord / SkRecordDraw
Since the bounds we pass to saveLayer are in the pre-filtering
coordinate space, they aren't correct for determining the actual
device pixels touched by the saveLayer in this case.
The easiest fix for now is to pass the clip bounds, since the final
draw done in restore() will never draw outside the clip.
We do adjust the bounds passed to saveLayer, so we just need to make
sure that when we're using a paint that may affect transparent black,
we ignore the calculated bounds of draw ops and use the clip intersected
with those adjusted bounds.
See originally crrev.com/497773002
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Review URL: https://codereview.chromium.org/496963003
(cherry picked from commit d910f544439fffa6c2bcc5181b79b2811a4c130a)
Review URL: https://codereview.chromium.org/504423002
3 files changed