tree c21f939c4bf13d4218c03878e18b36fa71bbabeb
parent 9f52e98e60ea763c5d6f80e7d7fbc6da7c48559b
author Mike Klein <mtklein@chromium.org> 1495300919 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> 1495302463 +0000

tidy up dither stage

Using the float iota was just an expedient to write the stage...
this CL adds the U32 iota that dither really wants.

Change-Id: I7990b10afd0c5277186b6b8e730245d291bcef0c
Reviewed-on: https://skia-review.googlesource.com/17441
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>