Since each corner uses a different reference point, it's possible that
FP rounding can cause the edges of very close radii on a common edge
to accidentally overlap. This can cause a pixel to be drawn/blended
more than once. This CL addresses the issue by not allowing
neighboring radii on a common edge to get closer than 1/16 pixel from
one another.
Bug: skia:8562
Change-Id: Ifda97c9a4c3973405f86f7fc6846a4073b3ab581
Reviewed-on: https://skia-review.googlesource.com/c/173036
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Jim Van Verth <jvanverth@google.com>
778edc883b