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@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:
FloatSize()52 FloatSize() : m_width(0), m_height(0) { }
FloatSize(float width,float height)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
width()58 float width() const { return m_width; }
height()59 float height() const { return m_height; }
60
setWidth(float width)61 void setWidth(float width) { m_width = width; }
setHeight(float height)62 void setHeight(float height) { m_height = height; }
63
isEmpty()64 bool isEmpty() const { return m_width <= 0 || m_height <= 0; }
65
aspectRatio()66 float aspectRatio() const { return m_width / m_height; }
67
scale(float scale)68 void scale(float scale)
69 {
70 m_width *= scale;
71 m_height *= scale;
72 }
73
expandedTo(const FloatSize & other)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
shrunkTo(const FloatSize & other)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;
diagonalLengthSquared()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
roundedIntSize(const FloatSize & p)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
expandedIntSize(const FloatSize & p)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