1/* 2 * Copyright (C) 2003, 2006 Apple Inc. All rights reserved. 3 * Copyright (C) 2005 Nokia. All rights reserved. 4 * 2008 Eric Seidel <eric@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 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 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 "IntPoint.h" 32#include <wtf/MathExtras.h> 33 34#if PLATFORM(IOS) 35#include <CoreGraphics/CoreGraphics.h> 36#endif 37 38#if USE(CG) 39typedef struct CGSize CGSize; 40#endif 41 42#if PLATFORM(MAC) 43#ifdef NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES 44typedef struct CGSize NSSize; 45#else 46typedef struct _NSSize NSSize; 47#endif 48#endif // PLATFORM(MAC) 49 50namespace WebCore { 51 52class IntSize; 53 54class FloatSize { 55public: 56 FloatSize() : m_width(0), m_height(0) { } 57 FloatSize(float width, float height) : m_width(width), m_height(height) { } 58 FloatSize(const IntSize&); 59 60 static FloatSize narrowPrecision(double width, double height); 61 62 float width() const { return m_width; } 63 float height() const { return m_height; } 64 65 void setWidth(float width) { m_width = width; } 66 void setHeight(float height) { m_height = height; } 67 68 bool isEmpty() const { return m_width <= 0 || m_height <= 0; } 69 bool isZero() const; 70 bool isExpressibleAsIntSize() const; 71 72 float aspectRatio() const { return m_width / m_height; } 73 74 void expand(float width, float height) 75 { 76 m_width += width; 77 m_height += height; 78 } 79 80 void scale(float s) { scale(s, s); } 81 82 void scale(float scaleX, float scaleY) 83 { 84 m_width *= scaleX; 85 m_height *= scaleY; 86 } 87 88 FloatSize expandedTo(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 FloatSize shrunkTo(const FloatSize& other) const 95 { 96 return FloatSize(m_width < other.m_width ? m_width : other.m_width, 97 m_height < other.m_height ? m_height : other.m_height); 98 } 99 100 float diagonalLength() const; 101 float diagonalLengthSquared() const 102 { 103 return m_width * m_width + m_height * m_height; 104 } 105 106 FloatSize transposedSize() const 107 { 108 return FloatSize(m_height, m_width); 109 } 110 111#if USE(CG) 112 explicit FloatSize(const CGSize&); // don't do this implicitly since it's lossy 113 operator CGSize() const; 114#endif 115 116#if PLATFORM(MAC) && !defined(NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES) 117 explicit FloatSize(const NSSize &); // don't do this implicitly since it's lossy 118 operator NSSize() const; 119#endif 120 121 void dump(WTF::PrintStream& out) const; 122 123private: 124 float m_width, m_height; 125}; 126 127inline FloatSize& operator+=(FloatSize& a, const FloatSize& b) 128{ 129 a.setWidth(a.width() + b.width()); 130 a.setHeight(a.height() + b.height()); 131 return a; 132} 133 134inline FloatSize& operator-=(FloatSize& a, const FloatSize& b) 135{ 136 a.setWidth(a.width() - b.width()); 137 a.setHeight(a.height() - b.height()); 138 return a; 139} 140 141inline FloatSize operator+(const FloatSize& a, const FloatSize& b) 142{ 143 return FloatSize(a.width() + b.width(), a.height() + b.height()); 144} 145 146inline FloatSize operator-(const FloatSize& a, const FloatSize& b) 147{ 148 return FloatSize(a.width() - b.width(), a.height() - b.height()); 149} 150 151inline FloatSize operator-(const FloatSize& size) 152{ 153 return FloatSize(-size.width(), -size.height()); 154} 155 156inline FloatSize operator*(const FloatSize& a, const float b) 157{ 158 return FloatSize(a.width() * b, a.height() * b); 159} 160 161inline FloatSize operator*(const float a, const FloatSize& b) 162{ 163 return FloatSize(a * b.width(), a * b.height()); 164} 165 166inline bool operator==(const FloatSize& a, const FloatSize& b) 167{ 168 return a.width() == b.width() && a.height() == b.height(); 169} 170 171inline bool operator!=(const FloatSize& a, const FloatSize& b) 172{ 173 return a.width() != b.width() || a.height() != b.height(); 174} 175 176inline IntSize roundedIntSize(const FloatSize& p) 177{ 178 return IntSize(clampToInteger(roundf(p.width())), clampToInteger(roundf(p.height()))); 179} 180 181inline IntSize flooredIntSize(const FloatSize& p) 182{ 183 return IntSize(clampToInteger(floorf(p.width())), clampToInteger(floorf(p.height()))); 184} 185 186inline IntSize expandedIntSize(const FloatSize& p) 187{ 188 return IntSize(clampToInteger(ceilf(p.width())), clampToInteger(ceilf(p.height()))); 189} 190 191inline IntPoint flooredIntPoint(const FloatSize& p) 192{ 193 return IntPoint(clampToInteger(floorf(p.width())), clampToInteger(floorf(p.height()))); 194} 195 196} // namespace WebCore 197 198#endif // FloatSize_h 199