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#pragma once
31
32#include "FloatPolygon.h"
33#include "Shape.h"
34#include "ShapeInterval.h"
35
36namespace WebCore {
37
38class OffsetPolygonEdge final : public VertexPair {
39public:
40 OffsetPolygonEdge(const FloatPolygonEdge& edge, const FloatSize& offset)
41 : m_vertex1(edge.vertex1() + offset)
42 , m_vertex2(edge.vertex2() + offset)
43 {
44 }
45
46 const FloatPoint& vertex1() const override { return m_vertex1; }
47 const FloatPoint& vertex2() const override { return m_vertex2; }
48
49 bool isWithinYRange(float y1, float y2) const { return y1 <= minY() && y2 >= maxY(); }
50 bool overlapsYRange(float y1, float y2) const { return y2 >= minY() && y1 <= maxY(); }
51 float xIntercept(float y) const;
52 FloatShapeInterval clippedEdgeXRange(float y1, float y2) const;
53
54private:
55 FloatPoint m_vertex1;
56 FloatPoint m_vertex2;
57};
58
59class PolygonShape : public Shape {
60 WTF_MAKE_NONCOPYABLE(PolygonShape);
61public:
62 PolygonShape(std::unique_ptr<Vector<FloatPoint>> vertices, WindRule fillRule)
63 : m_polygon(WTFMove(vertices), fillRule)
64 {
65 }
66
67 LayoutRect shapeMarginLogicalBoundingBox() const override;
68 bool isEmpty() const override { return m_polygon.isEmpty(); }
69 LineSegment getExcludedInterval(LayoutUnit logicalTop, LayoutUnit logicalHeight) const override;
70
71 void buildDisplayPaths(DisplayPaths&) const override;
72
73private:
74 FloatPolygon m_polygon;
75};
76
77} // namespace WebCore
78