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/*
* Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef PolygonShape_h
#define PolygonShape_h
#include "FloatPolygon.h"
#include "Shape.h"
#include "ShapeInterval.h"
namespace WebCore {
class OffsetPolygonEdge : public VertexPair {
public:
enum Basis {
Edge,
Vertex,
LineTop
};
OffsetPolygonEdge(const FloatPolygonEdge& edge, const FloatSize& offset)
: m_vertex1(edge.vertex1() + offset)
, m_vertex2(edge.vertex2() + offset)
, m_edgeIndex(edge.edgeIndex())
, m_basis(Edge)
{
}
OffsetPolygonEdge(const FloatPoint& reflexVertex, const FloatSize& offset1, const FloatSize& offset2)
: m_vertex1(reflexVertex + offset1)
, m_vertex2(reflexVertex + offset2)
, m_edgeIndex(-1)
, m_basis(Vertex)
{
}
OffsetPolygonEdge(const FloatPolygon& polygon, float minLogicalIntervalTop, const FloatSize& offset)
: m_vertex1(FloatPoint(polygon.boundingBox().x(), minLogicalIntervalTop) + offset)
, m_vertex2(FloatPoint(polygon.boundingBox().maxX(), minLogicalIntervalTop) + offset)
, m_edgeIndex(-1)
, m_basis(LineTop)
{
}
virtual const FloatPoint& vertex1() const OVERRIDE { return m_vertex1; }
virtual const FloatPoint& vertex2() const OVERRIDE { return m_vertex2; }
int edgeIndex() const { return m_edgeIndex; }
Basis basis() const { return m_basis; }
private:
FloatPoint m_vertex1;
FloatPoint m_vertex2;
int m_edgeIndex;
Basis m_basis;
};
class PolygonShape : public Shape {
WTF_MAKE_NONCOPYABLE(PolygonShape);
public:
PolygonShape(PassOwnPtr<Vector<FloatPoint> > vertices, WindRule fillRule)
: Shape()
, m_polygon(vertices, fillRule)
, m_marginBounds(nullptr)
, m_paddingBounds(nullptr)
{
}
virtual LayoutRect shapeMarginLogicalBoundingBox() const OVERRIDE { return static_cast<LayoutRect>(shapeMarginBounds().boundingBox()); }
virtual LayoutRect shapePaddingLogicalBoundingBox() const OVERRIDE { return static_cast<LayoutRect>(shapePaddingBounds().boundingBox()); }
virtual bool isEmpty() const OVERRIDE { return m_polygon.isEmpty(); }
virtual void getExcludedIntervals(LayoutUnit logicalTop, LayoutUnit logicalHeight, SegmentList&) const OVERRIDE;
virtual void getIncludedIntervals(LayoutUnit logicalTop, LayoutUnit logicalHeight, SegmentList&) const OVERRIDE;
virtual bool firstIncludedIntervalLogicalTop(LayoutUnit minLogicalIntervalTop, const LayoutSize& minLogicalIntervalSize, LayoutUnit&) const OVERRIDE;
private:
const FloatPolygon& shapeMarginBounds() const;
const FloatPolygon& shapePaddingBounds() const;
FloatPolygon m_polygon;
mutable OwnPtr<FloatPolygon> m_marginBounds;
mutable OwnPtr<FloatPolygon> m_paddingBounds;
};
} // namespace WebCore
#endif // PolygonShape_h
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