1 /* 2 * Copyright 2012 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 #ifndef SkPathOpsLine_DEFINED 8 #define SkPathOpsLine_DEFINED 9 10 #include "SkPathOpsPoint.h" 11 12 struct SkDLine { 13 SkDPoint fPts[2]; 14 15 const SkDPoint& operator[](int n) const { SkASSERT(n >= 0 && n < 2); return fPts[n]; } 16 SkDPoint& operator[](int n) { SkASSERT(n >= 0 && n < 2); return fPts[n]; } 17 setSkDLine18 void set(const SkPoint pts[2]) { 19 fPts[0] = pts[0]; 20 fPts[1] = pts[1]; 21 } 22 SubDivideSkDLine23 static SkDLine SubDivide(const SkPoint a[2], double t1, double t2) { 24 SkDLine line; 25 line.set(a); 26 return line.subDivide(t1, t2); 27 } 28 29 double exactPoint(const SkDPoint& xy) const; 30 static double ExactPointH(const SkDPoint& xy, double left, double right, double y); 31 static double ExactPointV(const SkDPoint& xy, double top, double bottom, double x); 32 double isLeft(const SkDPoint& pt) const; 33 double nearPoint(const SkDPoint& xy, bool* unequal) const; 34 bool nearRay(const SkDPoint& xy) const; 35 static double NearPointH(const SkDPoint& xy, double left, double right, double y); 36 static double NearPointV(const SkDPoint& xy, double top, double bottom, double x); 37 static bool NearRay(double dx1, double dy1, double dx2, double dy2); 38 SkDPoint ptAtT(double t) const; 39 SkDLine subDivide(double t1, double t2) const; 40 41 void dump() const; 42 private: tangentSkDLine43 SkDVector tangent() const { return fPts[0] - fPts[1]; } 44 }; 45 46 #endif 47