SkPathOpsLine.h revision 4fdbb229649caf74e5c1b55a1823926df903af34
107393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com/* 207393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com * Copyright 2012 Google Inc. 307393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com * 407393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com * Use of this source code is governed by a BSD-style license that can be 507393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com * found in the LICENSE file. 607393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com */ 707393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com#ifndef SkPathOpsLine_DEFINED 807393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com#define SkPathOpsLine_DEFINED 907393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com 1007393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com#include "SkPathOpsPoint.h" 1107393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com 1207393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.comstruct SkDLine { 1307393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com SkDPoint fPts[2]; 1407393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com 15fa2aeee27af27f2934ee52a9732148f66481fb03caryclark@google.com const SkDPoint& operator[](int n) const { SkASSERT(n >= 0 && n < 2); return fPts[n]; } 16fa2aeee27af27f2934ee52a9732148f66481fb03caryclark@google.com SkDPoint& operator[](int n) { SkASSERT(n >= 0 && n < 2); return fPts[n]; } 17fa2aeee27af27f2934ee52a9732148f66481fb03caryclark@google.com 1807393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com void set(const SkPoint pts[2]) { 1907393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com fPts[0] = pts[0]; 2007393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com fPts[1] = pts[1]; 2107393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com } 2207393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com 2307393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com static SkDLine SubDivide(const SkPoint a[2], double t1, double t2) { 2407393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com SkDLine line; 2507393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com line.set(a); 2607393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com return line.subDivide(t1, t2); 2707393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com } 28fa2aeee27af27f2934ee52a9732148f66481fb03caryclark@google.com 29fa2aeee27af27f2934ee52a9732148f66481fb03caryclark@google.com double exactPoint(const SkDPoint& xy) const; 30fa2aeee27af27f2934ee52a9732148f66481fb03caryclark@google.com static double ExactPointH(const SkDPoint& xy, double left, double right, double y); 31fa2aeee27af27f2934ee52a9732148f66481fb03caryclark@google.com static double ExactPointV(const SkDPoint& xy, double top, double bottom, double x); 32fa2aeee27af27f2934ee52a9732148f66481fb03caryclark@google.com double isLeft(const SkDPoint& pt) const; 33fa2aeee27af27f2934ee52a9732148f66481fb03caryclark@google.com double nearPoint(const SkDPoint& xy) const; 34fa2aeee27af27f2934ee52a9732148f66481fb03caryclark@google.com static double NearPointH(const SkDPoint& xy, double left, double right, double y); 35fa2aeee27af27f2934ee52a9732148f66481fb03caryclark@google.com static double NearPointV(const SkDPoint& xy, double top, double bottom, double x); 364fdbb229649caf74e5c1b55a1823926df903af34caryclark@google.com SkDPoint ptAtT(double t) const; 37fa2aeee27af27f2934ee52a9732148f66481fb03caryclark@google.com SkDLine subDivide(double t1, double t2) const; 3807393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.comprivate: 3907393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com SkDVector tangent() const { return fPts[0] - fPts[1]; } 4007393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com}; 4107393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com 4207393cab57ce74a4aae89a31fae9aaa9780fc19dcaryclark@google.com#endif 43