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| 1 /* | |
| 2 * Copyright (C) 2013 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 RasterShape_h | |
| 31 #define RasterShape_h | |
| 32 | |
| 33 #include "core/rendering/shapes/Shape.h" | |
| 34 #include "core/rendering/shapes/ShapeInterval.h" | |
| 35 #include "platform/geometry/FloatRect.h" | |
| 36 #include "wtf/Assertions.h" | |
| 37 #include "wtf/Vector.h" | |
| 38 | |
| 39 namespace blink { | |
| 40 | |
| 41 class RasterShapeIntervals { | |
| 42 public: | |
| 43 RasterShapeIntervals(unsigned size, int offset = 0) | |
| 44 : m_offset(offset) | |
| 45 { | |
| 46 m_intervals.resize(clampTo<int>(size)); | |
| 47 } | |
| 48 | |
| 49 void initializeBounds(); | |
| 50 const IntRect& bounds() const { return m_bounds; } | |
| 51 bool isEmpty() const { return m_bounds.isEmpty(); } | |
| 52 | |
| 53 IntShapeInterval& intervalAt(int y) | |
| 54 { | |
| 55 ASSERT(y + m_offset >= 0 && static_cast<unsigned>(y + m_offset) < m_inte
rvals.size()); | |
| 56 return m_intervals[y + m_offset]; | |
| 57 } | |
| 58 | |
| 59 const IntShapeInterval& intervalAt(int y) const | |
| 60 { | |
| 61 ASSERT(y + m_offset >= 0 && static_cast<unsigned>(y + m_offset) < m_inte
rvals.size()); | |
| 62 return m_intervals[y + m_offset]; | |
| 63 } | |
| 64 | |
| 65 PassOwnPtr<RasterShapeIntervals> computeShapeMarginIntervals(int shapeMargin
) const; | |
| 66 | |
| 67 void buildBoundsPath(Path&) const; | |
| 68 | |
| 69 private: | |
| 70 int size() const { return m_intervals.size(); } | |
| 71 int offset() const { return m_offset; } | |
| 72 int minY() const { return -m_offset; } | |
| 73 int maxY() const { return -m_offset + m_intervals.size(); } | |
| 74 | |
| 75 IntRect m_bounds; | |
| 76 Vector<IntShapeInterval> m_intervals; | |
| 77 int m_offset; | |
| 78 }; | |
| 79 | |
| 80 class RasterShape final : public Shape { | |
| 81 WTF_MAKE_NONCOPYABLE(RasterShape); | |
| 82 public: | |
| 83 RasterShape(PassOwnPtr<RasterShapeIntervals> intervals, const IntSize& margi
nRectSize) | |
| 84 : m_intervals(intervals) | |
| 85 , m_marginRectSize(marginRectSize) | |
| 86 { | |
| 87 m_intervals->initializeBounds(); | |
| 88 } | |
| 89 | |
| 90 virtual LayoutRect shapeMarginLogicalBoundingBox() const override { return s
tatic_cast<LayoutRect>(marginIntervals().bounds()); } | |
| 91 virtual bool isEmpty() const override { return m_intervals->isEmpty(); } | |
| 92 virtual LineSegment getExcludedInterval(LayoutUnit logicalTop, LayoutUnit lo
gicalHeight) const override; | |
| 93 virtual void buildDisplayPaths(DisplayPaths& paths) const override | |
| 94 { | |
| 95 m_intervals->buildBoundsPath(paths.shape); | |
| 96 if (shapeMargin()) | |
| 97 marginIntervals().buildBoundsPath(paths.marginShape); | |
| 98 } | |
| 99 | |
| 100 private: | |
| 101 const RasterShapeIntervals& marginIntervals() const; | |
| 102 | |
| 103 OwnPtr<RasterShapeIntervals> m_intervals; | |
| 104 mutable OwnPtr<RasterShapeIntervals> m_marginIntervals; | |
| 105 IntSize m_marginRectSize; | |
| 106 }; | |
| 107 | |
| 108 } // namespace blink | |
| 109 | |
| 110 #endif // RasterShape_h | |
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