tree fcb699c3d52fef9b119a82ba0a168fe5148b895b
parent cfdf87ecd2ac1c43a9b8c0dbdf6efb02e429af05
author Mike Klein <mtklein@google.com> 1552508155 -0500
committer Skia Commit-Bot <skia-commit-bot@chromium.org> 1552571599 +0000

remove plus clamp

Clamping for plus mode should happen only as the destination format
requires it, or as a consequence of the limited range we're holding
colors in the pipeline, or because non-normalized alpha is nuts.

So I've taken away the clamp on float rgb, keeping it on lowp to stay
in its legal range, and on float alpha because it's crazy not to.

Open questions:
  - also clamp alpha to zero?
  - what do we do with alpha <0 or >1 in general, beyond plus?

Cq-Include-Trybots: luci.chromium.try:linux-blink-rel
Change-Id: I15660ce55cc393e312f18ffdc13bbfdef08ac6e0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/201040
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>