pathops version two

src/pathops/SkPathOpsLine.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 SkPathOpsLine_DEFINED
 #define SkPathOpsLine_DEFINED
 
 #include "SkPathOpsPoint.h"
 
 struct SkDLine {
     SkDPoint fPts[2];
 
     const SkDPoint& operator[](int n) const { SkASSERT(n >= 0 && n < 2); return fPts[n]; }
     SkDPoint& operator[](int n) { SkASSERT(n >= 0 && n < 2); return fPts[n]; }
 
     void set(const SkPoint pts[2]) {
         fPts[0] = pts[0];
         fPts[1] = pts[1];
     }
 
-    static SkDLine SubDivide(const SkPoint a[2], double t1, double t2) {
-        SkDLine line;
-        line.set(a);
-        return line.subDivide(t1, t2);
-    }
-
     double exactPoint(const SkDPoint& xy) const;
     static double ExactPointH(const SkDPoint& xy, double left, double right, double y);
     static double ExactPointV(const SkDPoint& xy, double top, double bottom, double x);
+
+    // only used by testing
     double isLeft(const SkDPoint& pt) const;
+
     double nearPoint(const SkDPoint& xy, bool* unequal) const;
     bool nearRay(const SkDPoint& xy) const;
     static double NearPointH(const SkDPoint& xy, double left, double right, double y);
     static double NearPointV(const SkDPoint& xy, double top, double bottom, double x);
-    static bool NearRay(double dx1, double dy1, double dx2, double dy2);
     SkDPoint ptAtT(double t) const;
-    SkDLine subDivide(double t1, double t2) const;
 
     void dump() const;
-private:
-    SkDVector tangent() const { return fPts[0] - fPts[1]; }
 };
 
 #endif