Fix mapping the morphology filter's radius when the CTM is a mirror op
When the CTM contained a "mirroring" operation - for example
scale(-1, 1) or scale(1, -1) - the radius of the morphology filter would
end up negative, essentially disabling the filter.
When mapping the radii, use the magnitude of a vector built from each
component of the radii instead of considering the radii as a plain
vector.
Bug: chromium:595244
Change-Id: Ia249f8962648f0a4e69b6d0becf87ee1ba6be9a6
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/246996
Reviewed-by: Florin Malita <fmalita@chromium.org>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Florin Malita <fmalita@chromium.org>
2 files changed