commit f41ae2f9738e32a43762b780e6d113b4b6157747
author lsalzman <lsalzman@mozilla.com> Thu Jul 21 09:37:59 2016 -0700
committer Commit bot <commit-bot@chromium.org> Thu Jul 21 09:37:59 2016 -0700
tree 678f86c9116c02df2afd1ae8a7eabc233573cbaa
parent f292a0c862f1c120cade1e8ac0f1882844eb343a

limit the number of points in SkDashPathEffect::asPoints

If the length of a line path is sufficiently long relative to the dash
interval, it is possible to cause SkDashPathEffect::asPoints to produce
so many points that it overflows the amount that can fit in an int type,
or otherwise produce non-finite values, i.e. path from (0,0) to (0,9e15)
with a dash interval of 1.

This fixes that by capping the amount of points to a sane limit - in this
case, 1mil, since that limit is also used in utils/SkDashPath.cpp and has
precedent.

Downstream Firefox bug report: https://bugzilla.mozilla.org/show_bug.cgi?id=1287515

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2165013002

Review-Url: https://codereview.chromium.org/2165013002