commit 8f457591e6a21c240fd2fca56a97281b556ce796
author fmalita <fmalita@chromium.org> Fri Oct 21 06:02:22 2016 -0700
committer Commit bot <commit-bot@chromium.org> Fri Oct 21 06:02:22 2016 -0700
tree da94692566d829de064eedba521dad98dd3cad4a
parent 3ae677c8f85fe0a4703d1df0b5941d59282d7ff7

[Sk4fGradient] Use infinity floats for clamp-mode extreme positions

In clamp mode, we use a couple of synthetic edges that are supposed to
extend to +/- infinity (-inf .. P0 and Pn .. inf).  Currently we use
SK_ScalarMin/Max, but these can be overrun with large/malicious inputs.

Use SK_ScalarInfinity/SK_ScalarNegativeInfinity instead, and tweak
compute_interval_props() to handle inf values gracefully.

BUG=skia:5835
R=reed@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2441733002

Review-Url: https://chromiumcodereview.appspot.com/2441733002