michael@0: /*
michael@0:  * Copyright 2012 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: #ifndef SkPathOpsLine_DEFINED
michael@0: #define SkPathOpsLine_DEFINED
michael@0: 
michael@0: #include "SkPathOpsPoint.h"
michael@0: 
michael@0: struct SkDLine {
michael@0:     SkDPoint fPts[2];
michael@0: 
michael@0:     const SkDPoint& operator[](int n) const { SkASSERT(n >= 0 && n < 2); return fPts[n]; }
michael@0:     SkDPoint& operator[](int n) { SkASSERT(n >= 0 && n < 2); return fPts[n]; }
michael@0: 
michael@0:     void set(const SkPoint pts[2]) {
michael@0:         fPts[0] = pts[0];
michael@0:         fPts[1] = pts[1];
michael@0:     }
michael@0: 
michael@0:     static SkDLine SubDivide(const SkPoint a[2], double t1, double t2) {
michael@0:         SkDLine line;
michael@0:         line.set(a);
michael@0:         return line.subDivide(t1, t2);
michael@0:     }
michael@0: 
michael@0:     double exactPoint(const SkDPoint& xy) const;
michael@0:     static double ExactPointH(const SkDPoint& xy, double left, double right, double y);
michael@0:     static double ExactPointV(const SkDPoint& xy, double top, double bottom, double x);
michael@0:     double isLeft(const SkDPoint& pt) const;
michael@0:     double nearPoint(const SkDPoint& xy) const;
michael@0:     bool nearRay(const SkDPoint& xy) const;
michael@0:     static double NearPointH(const SkDPoint& xy, double left, double right, double y);
michael@0:     static double NearPointV(const SkDPoint& xy, double top, double bottom, double x);
michael@0:     static bool NearRay(double dx1, double dy1, double dx2, double dy2);
michael@0:     SkDPoint ptAtT(double t) const;
michael@0:     SkDLine subDivide(double t1, double t2) const;
michael@0: 
michael@0: #ifdef SK_DEBUG
michael@0:     void dump();
michael@0: #endif
michael@0: private:
michael@0:     SkDVector tangent() const { return fPts[0] - fPts[1]; }
michael@0: };
michael@0: 
michael@0: #endif