tree 8e3c242983ed75b99a7c419c5cce946acf6e8341
parent a6b646986bf554e9f537494cfe1d7d577fdac796
author Brian Osman <brianosman@google.com> 1505229656 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> 1505230740 +0000

Remove symmetric three stop special case

Just let the general three-stop shader handle all three-stop gradients.
Also, pre-compute values derived from the middle stop to remove all
division (and actually convert computation to FMA form).

Bug: skia:
Change-Id: I1aae069d929d1a942c38aa2e2f3fd5fb7d9b2f10
Reviewed-on: https://skia-review.googlesource.com/45800
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>