commit 42c27486c1ffb16339be984eb6dde03e714a2c65
author Mike Klein <mtklein@chromium.org> Mon Apr 30 11:14:49 2018 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Mon Apr 30 18:10:31 2018 +0000
tree 613fb0609934cf609b65e6061022345b3536d9bf
parent 03457e177feaa237d742a795a7c050c0476c2cb5

handle L==N-1 special case in PolyTF fit

This fixes three bugs:
   - we were not catching the L=N-1 case at all in polytf fit
   - the parametric L=N-1 case was slightly wrong,
     evaluating b at the wrong x.
   - we were not looking for linear g,a,b cases

I was unable to extract a profile from the image in the attached bug,
but the two new test cases cover all three of these bugs jointly.

Bug: oss-fuzz:8061

Change-Id: I5628b79eac178fd2ff0b6015d2f06e6fed964df9
Reviewed-on: https://skia-review.googlesource.com/124482
Commit-Queue: Mike Klein <mtklein@chromium.org>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Auto-Submit: Mike Klein <mtklein@chromium.org>