Add more tests for PolyUtils

* Add fuzzer
* Add bench tests
* Add additional unit test
* Fix some bugs these exposed.

Bug: skia:
Change-Id: I6c587c92cb6cff32ab8300020b78f9f247d2bf64
Reviewed-on: https://skia-review.googlesource.com/139169
Commit-Queue: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/src/utils/SkShadowTessellator.cpp b/src/utils/SkShadowTessellator.cpp
index 873e6d2687..b485f3f68c 100755
--- a/src/utils/SkShadowTessellator.cpp
+++ b/src/utils/SkShadowTessellator.cpp
@@ -500,7 +500,10 @@ bool SkBaseShadowTessellator::addArc(const SkVector& nextNormal, bool finishArc)
     // fill in fan from previous quad
     SkScalar rotSin, rotCos;
     int numSteps;
-    SkComputeRadialSteps(fPrevOutset, nextNormal, fRadius, &rotSin, &rotCos, &numSteps);
+    if (!SkComputeRadialSteps(fPrevOutset, nextNormal, fRadius, &rotSin, &rotCos, &numSteps)) {
+        // recover as best we can
+        numSteps = 0;
+    }
     SkVector prevNormal = fPrevOutset;
     for (int i = 0; i < numSteps-1; ++i) {
         SkVector currNormal;