1 /* 2 * Copyright (C) 2003, 2006 Apple Computer, Inc. All rights reserved. 3 * Copyright (C) 2005 Nokia. All rights reserved. 4 * 2008 Eric Seidel <eric (at) webkit.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 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 COMPUTER, INC. ``AS IS'' AND ANY 16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 23 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef FloatSize_h 29 #define FloatSize_h 30 31 #include "IntSize.h" 32 #include <wtf/MathExtras.h> 33 34 #if USE(CG) || (PLATFORM(WX) && OS(DARWIN)) || USE(SKIA_ON_MAC_CHROME) 35 typedef struct CGSize CGSize; 36 #endif 37 38 #if PLATFORM(MAC) || (PLATFORM(CHROMIUM) && OS(DARWIN)) 39 #ifdef NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES 40 typedef struct CGSize NSSize; 41 #else 42 typedef struct _NSSize NSSize; 43 #endif 44 #endif 45 46 namespace WebCore { 47 48 class IntSize; 49 50 class FloatSize { 51 public: 52 FloatSize() : m_width(0), m_height(0) { } 53 FloatSize(float width, float height) : m_width(width), m_height(height) { } 54 FloatSize(const IntSize&); 55 56 static FloatSize narrowPrecision(double width, double height); 57 58 float width() const { return m_width; } 59 float height() const { return m_height; } 60 61 void setWidth(float width) { m_width = width; } 62 void setHeight(float height) { m_height = height; } 63 64 bool isEmpty() const { return m_width <= 0 || m_height <= 0; } 65 66 float aspectRatio() const { return m_width / m_height; } 67 68 void scale(float scale) 69 { 70 m_width *= scale; 71 m_height *= scale; 72 } 73 74 FloatSize expandedTo(const FloatSize& other) const 75 { 76 return FloatSize(m_width > other.m_width ? m_width : other.m_width, 77 m_height > other.m_height ? m_height : other.m_height); 78 } 79 80 FloatSize shrunkTo(const FloatSize& other) const 81 { 82 return FloatSize(m_width < other.m_width ? m_width : other.m_width, 83 m_height < other.m_height ? m_height : other.m_height); 84 } 85 86 float diagonalLength() const; 87 float diagonalLengthSquared() const 88 { 89 return m_width * m_width + m_height * m_height; 90 } 91 92 #if USE(CG) || (PLATFORM(WX) && OS(DARWIN)) || USE(SKIA_ON_MAC_CHROME) 93 explicit FloatSize(const CGSize&); // don't do this implicitly since it's lossy 94 operator CGSize() const; 95 #endif 96 97 #if (PLATFORM(MAC) && !defined(NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES)) \ 98 || (PLATFORM(CHROMIUM) && OS(DARWIN)) 99 explicit FloatSize(const NSSize &); // don't do this implicitly since it's lossy 100 operator NSSize() const; 101 #endif 102 103 private: 104 float m_width, m_height; 105 }; 106 107 inline FloatSize& operator+=(FloatSize& a, const FloatSize& b) 108 { 109 a.setWidth(a.width() + b.width()); 110 a.setHeight(a.height() + b.height()); 111 return a; 112 } 113 114 inline FloatSize& operator-=(FloatSize& a, const FloatSize& b) 115 { 116 a.setWidth(a.width() - b.width()); 117 a.setHeight(a.height() - b.height()); 118 return a; 119 } 120 121 inline FloatSize operator+(const FloatSize& a, const FloatSize& b) 122 { 123 return FloatSize(a.width() + b.width(), a.height() + b.height()); 124 } 125 126 inline FloatSize operator-(const FloatSize& a, const FloatSize& b) 127 { 128 return FloatSize(a.width() - b.width(), a.height() - b.height()); 129 } 130 131 inline FloatSize operator-(const FloatSize& size) 132 { 133 return FloatSize(-size.width(), -size.height()); 134 } 135 136 inline bool operator==(const FloatSize& a, const FloatSize& b) 137 { 138 return a.width() == b.width() && a.height() == b.height(); 139 } 140 141 inline bool operator!=(const FloatSize& a, const FloatSize& b) 142 { 143 return a.width() != b.width() || a.height() != b.height(); 144 } 145 146 inline IntSize roundedIntSize(const FloatSize& p) 147 { 148 return IntSize(static_cast<int>(roundf(p.width())), static_cast<int>(roundf(p.height()))); 149 } 150 151 inline IntSize expandedIntSize(const FloatSize& p) 152 { 153 return IntSize(clampToInteger(ceilf(p.width())), clampToInteger(ceilf(p.height()))); 154 } 155 156 } // namespace WebCore 157 158 #endif // FloatSize_h 159
