commit d2f489e793667c594102183b841cbeb84fb010a4
author Mike Klein <mtklein@google.com> Mon Jan 07 12:32:33 2019 -0600
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Mon Jan 07 19:46:04 2019 +0000
tree 131d66cc406cf4694e820318007ab4f5d9901a09
parent 8b9d1f9db8a814a730e0b72850bc0e757213a920

rewrite skcms_TransferFunction_invert

This is mostly me rewriting the code and comments as a way to make sure
I understand the math.

I'm somewhat puzzled that the BenQ_GL2450 profile approximation changes
to skip the linear segment.  I think that's from how I'm now checking
inv.d > 0 for when the linear segment matters?

Change-Id: I0d6ad1093e0c709a2d15fbd509c48f2c312f4cc6
Reviewed-on: https://skia-review.googlesource.com/c/181725
Auto-Submit: Mike Klein <mtklein@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>