1 /* 2 * Copyright (C) 2003, 2006, 2009 Apple Inc. All rights reserved. 3 * Copyright (C) 2010 Google Inc. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 19 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 22 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef RoundedRect_h 28 #define RoundedRect_h 29 30 #include "platform/geometry/FloatQuad.h" 31 #include "platform/geometry/IntRect.h" 32 33 namespace blink { 34 35 // This class is used to represent rectangles with rounded corners. It is only 36 // used for painting. It uses integer units because using layout units leads to 37 // blurry rounded corners. 38 class PLATFORM_EXPORT RoundedRect { 39 public: 40 class PLATFORM_EXPORT Radii { 41 public: Radii()42 Radii() { } Radii(const IntSize & topLeft,const IntSize & topRight,const IntSize & bottomLeft,const IntSize & bottomRight)43 Radii(const IntSize& topLeft, const IntSize& topRight, const IntSize& bottomLeft, const IntSize& bottomRight) 44 : m_topLeft(topLeft) 45 , m_topRight(topRight) 46 , m_bottomLeft(bottomLeft) 47 , m_bottomRight(bottomRight) 48 { 49 } 50 setTopLeft(const IntSize & size)51 void setTopLeft(const IntSize& size) { m_topLeft = size; } setTopRight(const IntSize & size)52 void setTopRight(const IntSize& size) { m_topRight = size; } setBottomLeft(const IntSize & size)53 void setBottomLeft(const IntSize& size) { m_bottomLeft = size; } setBottomRight(const IntSize & size)54 void setBottomRight(const IntSize& size) { m_bottomRight = size; } topLeft()55 const IntSize& topLeft() const { return m_topLeft; } topRight()56 const IntSize& topRight() const { return m_topRight; } bottomLeft()57 const IntSize& bottomLeft() const { return m_bottomLeft; } bottomRight()58 const IntSize& bottomRight() const { return m_bottomRight; } 59 60 bool isZero() const; 61 62 void includeLogicalEdges(const Radii& edges, bool isHorizontal, bool includeLogicalLeftEdge, bool includeLogicalRightEdge); 63 void excludeLogicalEdges(bool isHorizontal, bool excludeLogicalLeftEdge, bool excludeLogicalRightEdge); 64 65 void scale(float factor); 66 void expand(int topWidth, int bottomWidth, int leftWidth, int rightWidth); expand(int size)67 void expand(int size) { expand(size, size, size, size); } shrink(int topWidth,int bottomWidth,int leftWidth,int rightWidth)68 void shrink(int topWidth, int bottomWidth, int leftWidth, int rightWidth) { expand(-topWidth, -bottomWidth, -leftWidth, -rightWidth); } shrink(int size)69 void shrink(int size) { shrink(size, size, size, size); } 70 71 private: 72 IntSize m_topLeft; 73 IntSize m_topRight; 74 IntSize m_bottomLeft; 75 IntSize m_bottomRight; 76 }; 77 78 explicit RoundedRect(const IntRect&, const Radii& = Radii()); 79 RoundedRect(int x, int y, int width, int height); 80 RoundedRect(const IntRect&, const IntSize& topLeft, const IntSize& topRight, const IntSize& bottomLeft, const IntSize& bottomRight); 81 rect()82 const IntRect& rect() const { return m_rect; } radii()83 const Radii& radii() const { return m_radii; } isRounded()84 bool isRounded() const { return !m_radii.isZero(); } isEmpty()85 bool isEmpty() const { return m_rect.isEmpty(); } 86 87 // Returns a quickly computed rect enclosed by the rounded rect. 88 IntRect radiusCenterRect() const; 89 setRect(const IntRect & rect)90 void setRect(const IntRect& rect) { m_rect = rect; } setRadii(const Radii & radii)91 void setRadii(const Radii& radii) { m_radii = radii; } 92 move(const IntSize & size)93 void move(const IntSize& size) { m_rect.move(size); } inflate(int size)94 void inflate(int size) { m_rect.inflate(size); } 95 void inflateWithRadii(int size); expandRadii(int size)96 void expandRadii(int size) { m_radii.expand(size); } shrinkRadii(int size)97 void shrinkRadii(int size) { m_radii.shrink(size); } 98 99 void includeLogicalEdges(const Radii& edges, bool isHorizontal, bool includeLogicalLeftEdge, bool includeLogicalRightEdge); 100 void excludeLogicalEdges(bool isHorizontal, bool excludeLogicalLeftEdge, bool excludeLogicalRightEdge); 101 102 bool isRenderable() const; 103 void adjustRadii(); 104 105 // Tests whether the quad intersects any part of this rounded rectangle. 106 // This only works for convex quads. 107 bool intersectsQuad(const FloatQuad&) const; 108 109 private: 110 IntRect m_rect; 111 Radii m_radii; 112 }; 113 114 inline bool operator==(const RoundedRect::Radii& a, const RoundedRect::Radii& b) 115 { 116 return a.topLeft() == b.topLeft() && a.topRight() == b.topRight() && a.bottomLeft() == b.bottomLeft() && a.bottomRight() == b.bottomRight(); 117 } 118 119 inline bool operator!=(const RoundedRect::Radii& a, const RoundedRect::Radii& b) 120 { 121 return !(a == b); 122 } 123 124 inline bool operator==(const RoundedRect& a, const RoundedRect& b) 125 { 126 return a.rect() == b.rect() && a.radii() == b.radii(); 127 } 128 129 130 } // namespace blink 131 132 #endif // RoundedRect_h 133