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 "platform/geometry/IntPoint.h" 32 #include "wtf/MathExtras.h" 33 34 #if OS(MACOSX) 35 typedef struct CGSize CGSize; 36 37 #ifdef __OBJC__ 38 #import <Foundation/Foundation.h> 39 #endif 40 #endif 41 42 namespace blink { 43 44 class IntSize; 45 class LayoutSize; 46 47 class PLATFORM_EXPORT FloatSize { 48 public: 49 FloatSize() : m_width(0), m_height(0) { } 50 FloatSize(float width, float height) : m_width(width), m_height(height) { } 51 FloatSize(const IntSize& size) : m_width(size.width()), m_height(size.height()) { } 52 FloatSize(const LayoutSize&); 53 54 static FloatSize narrowPrecision(double width, double height); 55 56 float width() const { return m_width; } 57 float height() const { return m_height; } 58 59 void setWidth(float width) { m_width = width; } 60 void setHeight(float height) { m_height = height; } 61 62 bool isEmpty() const { return m_width <= 0 || m_height <= 0; } 63 bool isZero() const; 64 bool isExpressibleAsIntSize() const; 65 66 float aspectRatio() const { return m_width / m_height; } 67 68 void expand(float width, float height) 69 { 70 m_width += width; 71 m_height += height; 72 } 73 74 void scale(float s) { scale(s, s); } 75 76 void scale(float scaleX, float scaleY) 77 { 78 m_width *= scaleX; 79 m_height *= scaleY; 80 } 81 82 FloatSize expandedTo(const FloatSize& other) const 83 { 84 return FloatSize(m_width > other.m_width ? m_width : other.m_width, 85 m_height > other.m_height ? m_height : other.m_height); 86 } 87 88 FloatSize shrunkTo(const FloatSize& other) const 89 { 90 return FloatSize(m_width < other.m_width ? m_width : other.m_width, 91 m_height < other.m_height ? m_height : other.m_height); 92 } 93 94 float diagonalLength() const; 95 float diagonalLengthSquared() const 96 { 97 return m_width * m_width + m_height * m_height; 98 } 99 100 FloatSize transposedSize() const 101 { 102 return FloatSize(m_height, m_width); 103 } 104 105 FloatSize scaledBy(float scale) const 106 { 107 return scaledBy(scale, scale); 108 } 109 110 FloatSize scaledBy(float scaleX, float scaleY) const 111 { 112 return FloatSize(m_width * scaleX, m_height * scaleY); 113 } 114 115 #if OS(MACOSX) 116 explicit FloatSize(const CGSize&); // don't do this implicitly since it's lossy 117 operator CGSize() const; 118 #if defined(__OBJC__) && !defined(NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES) 119 explicit FloatSize(const NSSize &); // don't do this implicitly since it's lossy 120 operator NSSize() const; 121 #endif 122 #endif 123 124 private: 125 float m_width, m_height; 126 }; 127 128 inline FloatSize& operator+=(FloatSize& a, const FloatSize& b) 129 { 130 a.setWidth(a.width() + b.width()); 131 a.setHeight(a.height() + b.height()); 132 return a; 133 } 134 135 inline FloatSize& operator-=(FloatSize& a, const FloatSize& b) 136 { 137 a.setWidth(a.width() - b.width()); 138 a.setHeight(a.height() - b.height()); 139 return a; 140 } 141 142 inline FloatSize operator+(const FloatSize& a, const FloatSize& b) 143 { 144 return FloatSize(a.width() + b.width(), a.height() + b.height()); 145 } 146 147 inline FloatSize operator-(const FloatSize& a, const FloatSize& b) 148 { 149 return FloatSize(a.width() - b.width(), a.height() - b.height()); 150 } 151 152 inline FloatSize operator-(const FloatSize& size) 153 { 154 return FloatSize(-size.width(), -size.height()); 155 } 156 157 inline FloatSize operator*(const FloatSize& a, const float b) 158 { 159 return FloatSize(a.width() * b, a.height() * b); 160 } 161 162 inline FloatSize operator*(const float a, const FloatSize& b) 163 { 164 return FloatSize(a * b.width(), a * b.height()); 165 } 166 167 inline bool operator==(const FloatSize& a, const FloatSize& b) 168 { 169 return a.width() == b.width() && a.height() == b.height(); 170 } 171 172 inline bool operator!=(const FloatSize& a, const FloatSize& b) 173 { 174 return a.width() != b.width() || a.height() != b.height(); 175 } 176 177 inline IntSize roundedIntSize(const FloatSize& p) 178 { 179 return IntSize(clampToInteger(roundf(p.width())), clampToInteger(roundf(p.height()))); 180 } 181 182 inline IntSize flooredIntSize(const FloatSize& p) 183 { 184 return IntSize(clampToInteger(floorf(p.width())), clampToInteger(floorf(p.height()))); 185 } 186 187 inline IntSize expandedIntSize(const FloatSize& p) 188 { 189 return IntSize(clampToInteger(ceilf(p.width())), clampToInteger(ceilf(p.height()))); 190 } 191 192 inline IntPoint flooredIntPoint(const FloatSize& p) 193 { 194 return IntPoint(clampToInteger(floorf(p.width())), clampToInteger(floorf(p.height()))); 195 } 196 197 } // namespace blink 198 199 #endif // FloatSize_h 200
