SkPathOpsLine.h revision 4fdbb229649caf74e5c1b55a1823926df903af34
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 12struct 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 18 void set(const SkPoint pts[2]) { 19 fPts[0] = pts[0]; 20 fPts[1] = pts[1]; 21 } 22 23 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) const; 34 static double NearPointH(const SkDPoint& xy, double left, double right, double y); 35 static double NearPointV(const SkDPoint& xy, double top, double bottom, double x); 36 SkDPoint ptAtT(double t) const; 37 SkDLine subDivide(double t1, double t2) const; 38private: 39 SkDVector tangent() const { return fPts[0] - fPts[1]; } 40}; 41 42#endif 43