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 "core/rendering/shapes/ShapeInterval.h" 35 #include "platform/geometry/FloatPolygon.h" 36 37 namespace blink { 38 39 class OffsetPolygonEdge FINAL : public VertexPair { 40 public: 41 OffsetPolygonEdge(const FloatPolygonEdge& edge, const FloatSize& offset) 42 : m_vertex1(edge.vertex1() + offset) 43 , m_vertex2(edge.vertex2() + offset) 44 { 45 } 46 47 virtual const FloatPoint& vertex1() const OVERRIDE { return m_vertex1; } 48 virtual const FloatPoint& vertex2() const OVERRIDE { return m_vertex2; } 49 50 bool isWithinYRange(float y1, float y2) const { return y1 <= minY() && y2 >= maxY(); } 51 bool overlapsYRange(float y1, float y2) const { return y2 >= minY() && y1 <= maxY(); } 52 float xIntercept(float y) const; 53 FloatShapeInterval clippedEdgeXRange(float y1, float y2) const; 54 55 private: 56 FloatPoint m_vertex1; 57 FloatPoint m_vertex2; 58 }; 59 60 class PolygonShape FINAL : public Shape { 61 WTF_MAKE_NONCOPYABLE(PolygonShape); 62 public: 63 PolygonShape(PassOwnPtr<Vector<FloatPoint> > vertices, WindRule fillRule) 64 : Shape() 65 , m_polygon(vertices, fillRule) 66 { 67 } 68 69 virtual LayoutRect shapeMarginLogicalBoundingBox() const OVERRIDE; 70 virtual bool isEmpty() const OVERRIDE { return m_polygon.isEmpty(); } 71 virtual LineSegment getExcludedInterval(LayoutUnit logicalTop, LayoutUnit logicalHeight) const OVERRIDE; 72 virtual void buildDisplayPaths(DisplayPaths&) const OVERRIDE; 73 74 private: 75 FloatPolygon m_polygon; 76 }; 77 78 } // namespace blink 79 80 #endif // PolygonShape_h 81