1 /* 2 * Copyright (C) 2003, 2006, 2009 Apple Inc. All rights reserved. 3 * 2006 Rob Buis <buis (at) kde.org> 4 * Copyright (C) 2007-2008 Torch Mobile, Inc. 5 * Copyright (C) 2013 Google Inc. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 20 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 21 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 24 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef Path_h 30 #define Path_h 31 32 #include "core/platform/graphics/RoundedRect.h" 33 #include "core/platform/graphics/WindRule.h" 34 #include "third_party/skia/include/core/SkPath.h" 35 #include "wtf/FastAllocBase.h" 36 #include "wtf/Forward.h" 37 38 class SkPath; 39 40 namespace WebCore { 41 42 class AffineTransform; 43 class FloatPoint; 44 class FloatRect; 45 class FloatSize; 46 class GraphicsContext; 47 class StrokeData; 48 49 enum PathElementType { 50 PathElementMoveToPoint, // The points member will contain 1 value. 51 PathElementAddLineToPoint, // The points member will contain 1 value. 52 PathElementAddQuadCurveToPoint, // The points member will contain 2 values. 53 PathElementAddCurveToPoint, // The points member will contain 3 values. 54 PathElementCloseSubpath // The points member will contain no values. 55 }; 56 57 // The points in the sturcture are the same as those that would be used with the 58 // add... method. For example, a line returns the endpoint, while a cubic returns 59 // two tangent points and the endpoint. 60 struct PathElement { 61 PathElementType type; 62 FloatPoint* points; 63 }; 64 65 typedef void (*PathApplierFunction)(void* info, const PathElement*); 66 67 class Path { 68 WTF_MAKE_FAST_ALLOCATED; 69 public: 70 Path(); 71 ~Path(); 72 73 Path(const Path&); 74 Path& operator=(const Path&); 75 bool operator==(const Path&) const; 76 77 bool contains(const FloatPoint&, WindRule = RULE_NONZERO) const; 78 bool strokeContains(const FloatPoint&, const StrokeData&) const; 79 FloatRect boundingRect() const; 80 FloatRect strokeBoundingRect(const StrokeData&) const; 81 82 float length() const; 83 FloatPoint pointAtLength(float length, bool& ok) const; 84 float normalAngleAtLength(float length, bool& ok) const; 85 bool pointAndNormalAtLength(float length, FloatPoint&, float&) const; 86 87 void clear(); 88 bool isEmpty() const; 89 // Gets the current point of the current path, which is conceptually the final point reached by the path so far. 90 // Note the Path can be empty (isEmpty() == true) and still have a current point. 91 bool hasCurrentPoint() const; 92 FloatPoint currentPoint() const; 93 94 WindRule windRule() const; 95 void setWindRule(const WindRule); 96 97 void moveTo(const FloatPoint&); 98 void addLineTo(const FloatPoint&); 99 void addQuadCurveTo(const FloatPoint& controlPoint, const FloatPoint& endPoint); 100 void addBezierCurveTo(const FloatPoint& controlPoint1, const FloatPoint& controlPoint2, const FloatPoint& endPoint); 101 void addArcTo(const FloatPoint&, const FloatPoint&, float radius); 102 void closeSubpath(); 103 104 void addArc(const FloatPoint&, float radius, float startAngle, float endAngle, bool anticlockwise); 105 void addRect(const FloatRect&); 106 void addEllipse(const FloatRect&); 107 108 void addRoundedRect(const FloatRect&, const FloatSize& roundingRadii); 109 void addRoundedRect(const FloatRect&, const FloatSize& topLeftRadius, const FloatSize& topRightRadius, const FloatSize& bottomLeftRadius, const FloatSize& bottomRightRadius); 110 void addRoundedRect(const RoundedRect&); 111 112 void translate(const FloatSize&); 113 114 const SkPath& skPath() const { return m_path; } 115 116 void apply(void* info, PathApplierFunction) const; 117 void transform(const AffineTransform&); 118 119 void addPathForRoundedRect(const FloatRect&, const FloatSize& topLeftRadius, const FloatSize& topRightRadius, const FloatSize& bottomLeftRadius, const FloatSize& bottomRightRadius); 120 void addBeziersForRoundedRect(const FloatRect&, const FloatSize& topLeftRadius, const FloatSize& topRightRadius, const FloatSize& bottomLeftRadius, const FloatSize& bottomRightRadius); 121 122 // Updates the path to the union (inclusive-or) of itself with the given argument. 123 bool unionPath(const Path& other); 124 125 private: 126 SkPath m_path; 127 }; 128 129 } 130 131 #endif 132
