diff --git a/src/utils/SkPolyUtils.cpp b/src/utils/SkPolyUtils.cpp
index aabd6d4..a37814a 100644
--- a/src/utils/SkPolyUtils.cpp
+++ b/src/utils/SkPolyUtils.cpp
@@ -1442,17 +1442,21 @@
     bool init(const SkRect& bounds, int vertexCount) {
         fBounds = bounds;
         fNumVerts = 0;
+        SkScalar width = bounds.width();
+        SkScalar height = bounds.height();
+        if (!SkScalarIsFinite(width) || !SkScalarIsFinite(height)) {
+            return false;
+        }
 
         // We want vertexCount grid cells, roughly distributed to match the bounds ratio
-        SkScalar hCount = SkScalarSqrt(sk_ieee_float_divide(vertexCount*bounds.width(),
-                                                            bounds.height()));
+        SkScalar hCount = SkScalarSqrt(sk_ieee_float_divide(vertexCount*width, height));
         if (!SkScalarIsFinite(hCount)) {
             return false;
         }
         fHCount = SkTMax(SkTMin(SkScalarRoundToInt(hCount), vertexCount), 1);
         fVCount = vertexCount/fHCount;
-        fGridConversion.set(sk_ieee_float_divide(fHCount - 0.001f, bounds.width()),
-                            sk_ieee_float_divide(fVCount - 0.001f, bounds.height()));
+        fGridConversion.set(sk_ieee_float_divide(fHCount - 0.001f, width),
+                            sk_ieee_float_divide(fVCount - 0.001f, height));
         if (!fGridConversion.isFinite()) {
             return false;
         }