tree 209573126d7fa2b4986d95b41fe04eb4e5abebb8
parent e801210a11f78017e29b8c2de1297c6e362c55c0
author Chris Dalton <csmartdalton@google.com> 1543449489 -0700
committer Skia Commit-Bot <skia-commit-bot@chromium.org> 1543520649 +0000

Draw ovals with GrAAFillRRectOp

GrAAFillRRectOp has special geometry and a fragment-shader branch to
conditionally evaluate the arc equation. This same special geometry
and fragment branch also turn out to be a substantial optimization for
drawing ovals (namely, by not evaluating the arc equation inside the
oval's inner diamond). Given these optimizations, it's a clear win to
draw ovals the exact same way we do round rects.

However, we still don't draw true circles as round rects, because it
can cause perf regressions on some platforms as compared to the
dedicated circle Op.

Bug: skia:
Change-Id: Ifdfc4f593a8ab01b6f73a9e15dde732254213455
Reviewed-on: https://skia-review.googlesource.com/c/173277
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>