1 /* 2 * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above 9 * copyright notice, this list of conditions and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above 12 * copyright notice, this list of conditions and the following 13 * disclaimer in the documentation and/or other materials 14 * provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 19 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 20 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 21 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 25 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 27 * OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #ifndef PolygonShape_h 31 #define PolygonShape_h 32 33 #include "core/rendering/shapes/Shape.h" 34 #include "platform/geometry/FloatPolygon.h" 35 36 namespace WebCore { 37 38 class OffsetPolygonEdge : public VertexPair { 39 public: 40 enum Basis { 41 Edge, 42 Vertex, 43 LineTop 44 }; 45 46 OffsetPolygonEdge(const FloatPolygonEdge& edge, const FloatSize& offset) 47 : m_vertex1(edge.vertex1() + offset) 48 , m_vertex2(edge.vertex2() + offset) 49 , m_edgeIndex(edge.edgeIndex()) 50 , m_basis(Edge) 51 { 52 } 53 54 OffsetPolygonEdge(const FloatPoint& reflexVertex, const FloatSize& offset1, const FloatSize& offset2) 55 : m_vertex1(reflexVertex + offset1) 56 , m_vertex2(reflexVertex + offset2) 57 , m_edgeIndex(-1) 58 , m_basis(Vertex) 59 { 60 } 61 62 OffsetPolygonEdge(const FloatPolygon& polygon, float minLogicalIntervalTop, const FloatSize& offset) 63 : m_vertex1(FloatPoint(polygon.boundingBox().x(), minLogicalIntervalTop) + offset) 64 , m_vertex2(FloatPoint(polygon.boundingBox().maxX(), minLogicalIntervalTop) + offset) 65 , m_edgeIndex(-1) 66 , m_basis(LineTop) 67 { 68 } 69 70 virtual const FloatPoint& vertex1() const OVERRIDE { return m_vertex1; } 71 virtual const FloatPoint& vertex2() const OVERRIDE { return m_vertex2; } 72 int edgeIndex() const { return m_edgeIndex; } 73 Basis basis() const { return m_basis; } 74 75 private: 76 FloatPoint m_vertex1; 77 FloatPoint m_vertex2; 78 int m_edgeIndex; 79 Basis m_basis; 80 }; 81 82 class PolygonShape : public Shape { 83 WTF_MAKE_NONCOPYABLE(PolygonShape); 84 public: 85 PolygonShape(PassOwnPtr<Vector<FloatPoint> > vertices, WindRule fillRule) 86 : Shape() 87 , m_polygon(vertices, fillRule) 88 , m_marginBounds(nullptr) 89 , m_paddingBounds(nullptr) 90 { 91 } 92 93 virtual LayoutRect shapeMarginLogicalBoundingBox() const OVERRIDE { return static_cast<LayoutRect>(shapeMarginBounds().boundingBox()); } 94 virtual LayoutRect shapePaddingLogicalBoundingBox() const OVERRIDE { return static_cast<LayoutRect>(shapePaddingBounds().boundingBox()); } 95 virtual bool isEmpty() const OVERRIDE { return m_polygon.isEmpty(); } 96 virtual void getExcludedIntervals(LayoutUnit logicalTop, LayoutUnit logicalHeight, SegmentList&) const OVERRIDE; 97 virtual void getIncludedIntervals(LayoutUnit logicalTop, LayoutUnit logicalHeight, SegmentList&) const OVERRIDE; 98 virtual bool firstIncludedIntervalLogicalTop(LayoutUnit minLogicalIntervalTop, const LayoutSize& minLogicalIntervalSize, LayoutUnit&) const OVERRIDE; 99 100 private: 101 const FloatPolygon& shapeMarginBounds() const; 102 const FloatPolygon& shapePaddingBounds() const; 103 104 FloatPolygon m_polygon; 105 mutable OwnPtr<FloatPolygon> m_marginBounds; 106 mutable OwnPtr<FloatPolygon> m_paddingBounds; 107 }; 108 109 } // namespace WebCore 110 111 #endif // PolygonShape_h 112