pathops coincident work

src/pathops/SkOpAngle.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkOpAngle.h"
 #include "SkOpSegment.h"
 #include "SkPathOpsCurve.h"
 #include "SkTSort.h"
@@ skipping 887 matching lines @@
     SkDEBUGCODE(fCurvePart[2].fX = fCurvePart[2].fY = fCurvePart[3].fX = fCurvePart[3].fY
             = SK_ScalarNaN);
     SkDEBUGCODE(fCurvePart.fVerb = segment->verb());
     segment->subDivide(fStart, fEnd, &fCurvePart);
     fOriginalCurvePart = fCurvePart;
     setCurveHullSweep();
     const SkPath::Verb verb = segment->verb();
     if (verb != SkPath::kLine_Verb
             && !(fIsCurve = fSweep[0].crossCheck(fSweep[1]) != 0)) {
         SkDLine lineHalf;
+        fCurvePart[1] = fCurvePart[SkPathOpsVerbToPoints(verb)];
+        fOriginalCurvePart[1] = fCurvePart[1];
         lineHalf[0].set(fCurvePart[0].asSkPoint());
-        lineHalf[1].set(fCurvePart[SkPathOpsVerbToPoints(verb)].asSkPoint());
+        lineHalf[1].set(fCurvePart[1].asSkPoint());
         fTangentHalf.lineEndPoints(lineHalf);
         fSide = 0;
     }
     switch (verb) {
     case SkPath::kLine_Verb: {
         SkASSERT(fStart != fEnd);
         const SkPoint& cP1 = pts[fStart->t() < fEnd->t()];
         SkDLine lineHalf;
         lineHalf[0].set(fStart->pt());
         lineHalf[1].set(cP1);
@@ skipping 130 matching lines @@
         return true;
     }
     SkASSERT(s0dt0 != 0);
     double m = s0xt0 / s0dt0;
     double sDist = sweep[0].length() * m;
     double tDist = tweep[0].length() * m;
     bool useS = fabs(sDist) < fabs(tDist);
     double mFactor = fabs(useS ? this->distEndRatio(sDist) : rh->distEndRatio(tDist));
     return mFactor < 50;   // empirically found limit
 }