Rewriting path writer

src/pathops/SkPathOpsCurve.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef SkPathOpsCurve_DEFINE
 #define SkPathOpsCurve_DEFINE
 
 #include "SkIntersections.h"
@@ skipping 64 matching lines @@
     SkDPoint quadTop(const SkPoint curve[3], SkScalar , double s, double e, double* topT);
 
     void setConicBounds(const SkPoint curve[3], SkScalar curveWeight,
                         double s, double e, SkPathOpsBounds* );
     void setCubicBounds(const SkPoint curve[4], SkScalar ,
                         double s, double e, SkPathOpsBounds* );
     void setQuadBounds(const SkPoint curve[3], SkScalar ,
                        double s, double e, SkPathOpsBounds*);
 };
 
+class SkDCurveSweep {
+public:
+    bool isCurve() const { return fIsCurve; }
+    bool isOrdered() const { return fOrdered; }
+    void setCurveHullSweep(SkPath::Verb verb);
+
+    SkDCurve fCurve;
+    SkDVector fSweep[2];
+private:
+    bool fIsCurve;
+    bool fOrdered;  // cleared when a cubic's control point isn't between the sweep vectors
+
+};
 
 extern SkDPoint (SkDCurve::* const Top[])(const SkPoint curve[], SkScalar cWeight,
     double tStart, double tEnd, double* topT);
 
 static SkDPoint dline_xy_at_t(const SkPoint a[2], SkScalar , double t) {
     SkDLine line;
     line.set(a);
     return line.ptAtT(t);
 }
 
@@ skipping 298 matching lines @@
     line_intercept_v,
     quad_intercept_h,
     quad_intercept_v,
     conic_intercept_h,
     conic_intercept_v,
     cubic_intercept_h,
     cubic_intercept_v,
 };
 
 #endif