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FloatPoint.h
1 /*
2  * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
3  * Copyright (C) 2005 Nokia. All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
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8  * 1. Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  * notice, this list of conditions and the following disclaimer in the
12  * documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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25  */
26 
27 #ifndef FloatPoint_h
28 #define FloatPoint_h
29 
30 #include "FloatSize.h"
31 #include <wtf/Platform.h>
32 
33 #if PLATFORM(CG)
34 typedef struct CGPoint CGPoint;
35 #endif
36 
37 #if PLATFORM(MAC)
38 #ifdef NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES
39 typedef struct CGPoint NSPoint;
40 #else
41 typedef struct _NSPoint NSPoint;
42 #endif
43 #endif
44 
45 #if PLATFORM(QT)
46 #include "qglobal.h"
47 QT_BEGIN_NAMESPACE
48 class QPointF;
49 QT_END_NAMESPACE
50 #endif
51 
52 #if PLATFORM(SYMBIAN)
53 class TPoint;
54 #endif
55 
56 namespace WebCore
57 {
58 
59 class AffineTransform;
60 class IntPoint;
61 
62 class FloatPoint
63 {
64 public:
65  FloatPoint() : m_x(0), m_y(0) { }
66  FloatPoint(float x, float y) : m_x(x), m_y(y) { }
67  FloatPoint(const IntPoint &);
68 
69  static FloatPoint narrowPrecision(double x, double y);
70 
71  float x() const
72  {
73  return m_x;
74  }
75  float y() const
76  {
77  return m_y;
78  }
79 
80  void setX(float x)
81  {
82  m_x = x;
83  }
84  void setY(float y)
85  {
86  m_y = y;
87  }
88  void move(float dx, float dy)
89  {
90  m_x += dx;
91  m_y += dy;
92  }
93 
94 #if PLATFORM(CG)
95  FloatPoint(const CGPoint &);
96  operator CGPoint() const;
97 #endif
98 
99 #if PLATFORM(MAC) && !defined(NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES)
100  FloatPoint(const NSPoint &);
101  operator NSPoint() const;
102 #endif
103 
104 #if PLATFORM(QT)
105  FloatPoint(const QPointF &);
106  operator QPointF() const;
107 #endif
108 
109 #if PLATFORM(SYMBIAN)
110  operator TPoint() const;
111  FloatPoint(const TPoint &);
112 #endif
113 
114  FloatPoint matrixTransform(const AffineTransform &) const;
115 
116 private:
117  float m_x, m_y;
118 };
119 
120 inline FloatPoint &operator+=(FloatPoint &a, const FloatSize &b)
121 {
122  a.move(b.width(), b.height());
123  return a;
124 }
125 
126 inline FloatPoint &operator-=(FloatPoint &a, const FloatSize &b)
127 {
128  a.move(-b.width(), -b.height());
129  return a;
130 }
131 
132 inline FloatPoint operator+(const FloatPoint &a, const FloatSize &b)
133 {
134  return FloatPoint(a.x() + b.width(), a.y() + b.height());
135 }
136 
137 inline FloatSize operator-(const FloatPoint &a, const FloatPoint &b)
138 {
139  return FloatSize(a.x() - b.x(), a.y() - b.y());
140 }
141 
142 inline FloatPoint operator-(const FloatPoint &a, const FloatSize &b)
143 {
144  return FloatPoint(a.x() - b.width(), a.y() - b.height());
145 }
146 
147 inline bool operator==(const FloatPoint &a, const FloatPoint &b)
148 {
149  return a.x() == b.x() && a.y() == b.y();
150 }
151 
152 inline bool operator!=(const FloatPoint &a, const FloatPoint &b)
153 {
154  return a.x() != b.x() || a.y() != b.y();
155 }
156 
157 }
158 
159 #endif
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