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111 lines
3.8 KiB
C++
111 lines
3.8 KiB
C++
/*
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* Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef RasterShape_h
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#define RasterShape_h
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#include "core/rendering/shapes/Shape.h"
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#include "core/rendering/shapes/ShapeInterval.h"
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#include "platform/geometry/FloatRect.h"
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#include "wtf/Assertions.h"
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#include "wtf/Vector.h"
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namespace blink {
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class RasterShapeIntervals {
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public:
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RasterShapeIntervals(unsigned size, int offset = 0)
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: m_offset(offset)
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{
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m_intervals.resize(clampTo<int>(size));
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}
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void initializeBounds();
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const IntRect& bounds() const { return m_bounds; }
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bool isEmpty() const { return m_bounds.isEmpty(); }
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IntShapeInterval& intervalAt(int y)
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{
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ASSERT(y + m_offset >= 0 && static_cast<unsigned>(y + m_offset) < m_intervals.size());
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return m_intervals[y + m_offset];
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}
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const IntShapeInterval& intervalAt(int y) const
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{
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ASSERT(y + m_offset >= 0 && static_cast<unsigned>(y + m_offset) < m_intervals.size());
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return m_intervals[y + m_offset];
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}
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PassOwnPtr<RasterShapeIntervals> computeShapeMarginIntervals(int shapeMargin) const;
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void buildBoundsPath(Path&) const;
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private:
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int size() const { return m_intervals.size(); }
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int offset() const { return m_offset; }
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int minY() const { return -m_offset; }
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int maxY() const { return -m_offset + m_intervals.size(); }
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IntRect m_bounds;
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Vector<IntShapeInterval> m_intervals;
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int m_offset;
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};
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class RasterShape FINAL : public Shape {
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WTF_MAKE_NONCOPYABLE(RasterShape);
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public:
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RasterShape(PassOwnPtr<RasterShapeIntervals> intervals, const IntSize& marginRectSize)
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: m_intervals(intervals)
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, m_marginRectSize(marginRectSize)
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{
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m_intervals->initializeBounds();
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}
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virtual LayoutRect shapeMarginLogicalBoundingBox() const OVERRIDE { return static_cast<LayoutRect>(marginIntervals().bounds()); }
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virtual bool isEmpty() const OVERRIDE { return m_intervals->isEmpty(); }
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virtual LineSegment getExcludedInterval(LayoutUnit logicalTop, LayoutUnit logicalHeight) const OVERRIDE;
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virtual void buildDisplayPaths(DisplayPaths& paths) const OVERRIDE
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{
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m_intervals->buildBoundsPath(paths.shape);
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if (shapeMargin())
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marginIntervals().buildBoundsPath(paths.marginShape);
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}
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private:
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const RasterShapeIntervals& marginIntervals() const;
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OwnPtr<RasterShapeIntervals> m_intervals;
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mutable OwnPtr<RasterShapeIntervals> m_marginIntervals;
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IntSize m_marginRectSize;
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};
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} // namespace blink
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#endif // RasterShape_h
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