fix circular dashing

tests/PathMeasureTest.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkPathMeasure.h"
 #include "Test.h"
 
@@ skipping 183 matching lines @@
         SkScalarNearlyEqual(position.fY,
                             2.0f,
                             0.0001f));
     REPORTER_ASSERT(reporter, tangent.fX == -SK_Scalar1);
     REPORTER_ASSERT(reporter, tangent.fY == 0);
 
     test_small_segment();
     test_small_segment2();
     test_small_segment3();
 }
+
+DEF_TEST(PathMeasureConic, reporter) {
+    SkPoint stdP, hiP, pts[] = {{0,0}, {100,0}, {100,0}};
+    SkPath p;
+    p.moveTo(0, 0);
+    p.conicTo(pts[1], pts[2], 1);
+    SkPathMeasure stdm(p, false);
+    REPORTER_ASSERT(reporter, stdm.getPosTan(20, &stdP, nullptr));
+    p.reset();
+    p.moveTo(0, 0);
+    p.conicTo(pts[1], pts[2], 10);
+    stdm.setPath(&p, false);
+    REPORTER_ASSERT(reporter, stdm.getPosTan(20, &hiP, nullptr));
+    REPORTER_ASSERT(reporter, 19.5f < stdP.fX && stdP.fX < 20.5f);
+    REPORTER_ASSERT(reporter, 19.5f < hiP.fX && hiP.fX < 20.5f);
+}