allow conic chop to fail

gm/beziereffects.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 // This test only works with the GPU backend.
 
 #include "gm.h"
@@ skipping 335 matching lines @@
         SkScalar t = SkFindQuadMaxCurvature(src);
         if (t == 0) {
             if (dst) {
                 dst[0].set(src, weight);
             }
             return 1;
         } else {
             if (dst) {
                 SkConic conic;
                 conic.set(src, weight);
-                conic.chopAt(t, dst);
+                if (!conic.chopAt(t, dst)) {
+                    dst[0].set(src, weight);
+                    return 1;
+                }
             }
             return 2;
         }
     }
 
     // Calls split_conic on the entire conic and then once more on each subsection.
     // Most cases will result in either 1 conic (chop point is not within t range)
     // or 3 points (split once and then one subsection is split again).
     int chop_conic(const SkPoint src[3], SkConic dst[4], const SkScalar weight) {
         SkConic dstTemp[2];
@@ skipping 180 matching lines @@
 private:
     typedef GM INHERITED;
 };
 
 DEF_GM(return new BezierCubicEffects;)
 DEF_GM(return new BezierConicEffects;)
 DEF_GM(return new BezierQuadEffects;)
 }
 
 #endif