commit db018dbcb9bedcc62ca6bc77b08cc4fca4fc52d0
author Cary Clark <caryclark@skia.org> Wed Oct 24 08:34:24 2018 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Wed Oct 24 13:46:01 2018 +0000
tree d1fde34d3d95502eee97c34e8a61f5b5469c08f5
parent 31abc5a4ee450fcfb5bdbdcdb0b484d2801e4cd9

fix fuzz divide by zero

R=kjlubick@google.com

Bug: skia:10985
Change-Id: I68fdb03e9d3cd6d7826b0d4fb16d181f7f648699
Reviewed-on: https://skia-review.googlesource.com/c/164685
Commit-Queue: Kevin Lubick <kjlubick@google.com>
Auto-Submit: Cary Clark <caryclark@skia.org>
Reviewed-by: Kevin Lubick <kjlubick@google.com>

src/pathops/SkOpAngle.cpp

diff --git a/src/pathops/SkOpAngle.cpp b/src/pathops/SkOpAngle.cpp
index d89706a..e25d7c4 100644
--- a/src/pathops/SkOpAngle.cpp
+++ b/src/pathops/SkOpAngle.cpp
@@ -637,9 +637,9 @@
         maxY = SkTMax(maxY, curve[idx2].fY);
     }
     double maxWidth = SkTMax(maxX - minX, maxY - minY);
-    endDist /= maxWidth;
-    if (endDist < 5e-12) {  // empirically found
-        return false;
+    endDist = sk_ieee_double_divide(endDist, maxWidth);
+    if (!(endDist >= 5e-12)) {  // empirically found
+        return false; // ! above catches NaN
     }
     const SkDPoint* endPt = &rayEnd[0];
     SkDPoint oppPt = iEnd.pt(closestEnd);