commit fd35c742bff9c7e39f1b6deeb2171d04ca895f0a
author Mike Klein <mtklein@chromium.org> Mon May 15 15:55:54 2017 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Mon May 15 20:37:16 2017 +0000
tree a22f0cfa941722601e2c399eaa3ae5c3b06a5315
parent 0dc6dd0a3f56798887d6d1d931485c5054f8c152

fix SkJumper radial gradient precision

rcp(rsqrt(x)) doesn't have enough precision when x is a coordinate.
(It's fine when x is a color, like in the softlight blend mode.)

Adds a GM to test this.  It used to look quite ugly.

Change-Id: Icec295c2e2f50ae7a5e3e33c62270f632a58f65c
Reviewed-on: https://skia-review.googlesource.com/16914
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>

gn/gm.gni

diff --git a/gn/gm.gni b/gn/gm.gni
index 4bcd103..2e1c8af 100644
--- a/gn/gm.gni
+++ b/gn/gm.gni
@@ -235,6 +235,7 @@
   "$_gm/poly2poly.cpp",
   "$_gm/polygons.cpp",
   "$_gm/quadpaths.cpp",
+  "$_gm/radial_gradient_precision.cpp",
   "$_gm/readpixels.cpp",
   "$_gm/recordopts.cpp",
   "$_gm/rectangletexture.cpp",