Fix subset behavior in makeWithFilter.
Most image filters were fixed with just the changes to SkImage::makeWithFilter
and the changes to SkSpecialImage's subset handling (particularly the
raster backend that could read from a bitmap view, or ganesh impls that relied
SkSpecialImage::draw).
The gpu implementation for alpha threshold, blurs, matrix convolutions,
and displacement maps have been updated to account for the special image's
offset when it reads from the backing texture.
Change-Id: I8778aa373e60e9268961305057b2bf6da2bdb3af
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/221121
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
14 files changed