commit 688ab403295dd486218088ee92ad7c738c535b70
author Mike Klein <mtklein@google.com> Wed Sep 05 15:16:52 2018 -0400
committer Mike Klein <mtklein@google.com> Fri Sep 07 17:37:15 2018 +0000
tree bd1a7c51cdcbce981f28716140301f3a956e3e60
parent 7ed0eae0cd13d3d687f7855b0620a0faad2ab5b3

fix sw extended transfer functions

We were not mirroring negative numbers about the y axis.

This is most visible when we hit the gamma-only fast path,
as the linear segment of a 7-parameter function will at
least still produce real-valued colors...

Bug is present when SK_LEGACY_EXTENDED_TRANSFER_FUNCTIONS,
fixed when not.

PS1 forgot from_srgb/to_srgb.

Bug: chromium:875650
Change-Id: I84a68be7f6a3cf6e847011cbab5aeab18f7fa38a
Reviewed-on: https://skia-review.googlesource.com/152000
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-on: https://skia-review.googlesource.com/152586