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/*
* Copyright (C) 2013 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 RasterShape_h
#define RasterShape_h
#include "core/layout/shapes/Shape.h"
#include "core/layout/shapes/ShapeInterval.h"
#include "platform/geometry/FloatRect.h"
#include "wtf/Assertions.h"
#include "wtf/Vector.h"
#include <memory>
namespace blink {
class RasterShapeIntervals {
USING_FAST_MALLOC(RasterShapeIntervals);
public:
RasterShapeIntervals(unsigned size, int offset = 0) : m_offset(offset) {
m_intervals.resize(clampTo<int>(size));
}
void initializeBounds();
const IntRect& bounds() const { return m_bounds; }
bool isEmpty() const { return m_bounds.isEmpty(); }
IntShapeInterval& intervalAt(int y) {
ASSERT(y + m_offset >= 0 &&
static_cast<unsigned>(y + m_offset) < m_intervals.size());
return m_intervals[y + m_offset];
}
const IntShapeInterval& intervalAt(int y) const {
ASSERT(y + m_offset >= 0 &&
static_cast<unsigned>(y + m_offset) < m_intervals.size());
return m_intervals[y + m_offset];
}
std::unique_ptr<RasterShapeIntervals> computeShapeMarginIntervals(
int shapeMargin) const;
void buildBoundsPath(Path&) const;
private:
int size() const { return m_intervals.size(); }
int offset() const { return m_offset; }
int minY() const { return -m_offset; }
int maxY() const { return -m_offset + m_intervals.size(); }
IntRect m_bounds;
Vector<IntShapeInterval> m_intervals;
int m_offset;
};
class RasterShape final : public Shape {
WTF_MAKE_NONCOPYABLE(RasterShape);
public:
RasterShape(std::unique_ptr<RasterShapeIntervals> intervals,
const IntSize& marginRectSize)
: m_intervals(std::move(intervals)), m_marginRectSize(marginRectSize) {
m_intervals->initializeBounds();
}
LayoutRect shapeMarginLogicalBoundingBox() const override {
return static_cast<LayoutRect>(marginIntervals().bounds());
}
bool isEmpty() const override { return m_intervals->isEmpty(); }
LineSegment getExcludedInterval(LayoutUnit logicalTop,
LayoutUnit logicalHeight) const override;
void buildDisplayPaths(DisplayPaths& paths) const override {
m_intervals->buildBoundsPath(paths.shape);
if (shapeMargin())
marginIntervals().buildBoundsPath(paths.marginShape);
}
private:
const RasterShapeIntervals& marginIntervals() const;
std::unique_ptr<RasterShapeIntervals> m_intervals;
mutable std::unique_ptr<RasterShapeIntervals> m_marginIntervals;
IntSize m_marginRectSize;
};
} // namespace blink
#endif // RasterShape_h
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