tree f426a2942b2d7533e6c45c3b3e1ac2a01391c4d2
parent 9b06f2168d52c06a61e75b017ad9e700ebb55919
author Michael Ludwig <michaelludwig@google.com> 1561147302 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> 1561150817 +0000

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>