source: trunk/src/gui/painting/qfixed_p.h

Last change on this file was 846, checked in by Dmitry A. Kuminov, 14 years ago

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.
File size: 9.8 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation (qt-info@nokia.com)
6**
7** This file is part of the QtGui module of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:LGPL$
10** Commercial Usage
11** Licensees holding valid Qt Commercial licenses may use this file in
12** accordance with the Qt Commercial License Agreement provided with the
13** Software or, alternatively, in accordance with the terms contained in
14** a written agreement between you and Nokia.
15**
16** GNU Lesser General Public License Usage
17** Alternatively, this file may be used under the terms of the GNU Lesser
18** General Public License version 2.1 as published by the Free Software
19** Foundation and appearing in the file LICENSE.LGPL included in the
20** packaging of this file. Please review the following information to
21** ensure the GNU Lesser General Public License version 2.1 requirements
22** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
23**
24** In addition, as a special exception, Nokia gives you certain additional
25** rights. These rights are described in the Nokia Qt LGPL Exception
26** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
35**
36** If you have questions regarding the use of this file, please contact
37** Nokia at qt-info@nokia.com.
38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42#ifndef QFIXED_P_H
43#define QFIXED_P_H
44
45//
46// W A R N I N G
47// -------------
48//
49// This file is not part of the Qt API. It exists for the convenience
50// of other Qt classes. This header file may change from version to
51// version without notice, or even be removed.
52//
53// We mean it.
54//
55
56#include "QtCore/qdebug.h"
57#include "QtCore/qpoint.h"
58#include "QtCore/qsize.h"
59
60QT_BEGIN_NAMESPACE
61
62struct QFixed {
63public:
64 QFixed() : val(0) {}
65 QFixed(int i) : val(i<<6) {}
66 QFixed(long i) : val(i<<6) {}
67 QFixed &operator=(int i) { val = (i<<6); return *this; }
68 QFixed &operator=(long i) { val = (i<<6); return *this; }
69
70 static QFixed fromReal(qreal r) { QFixed f; f.val = (int)(r*qreal(64)); return f; }
71 static QFixed fromFixed(int fixed) { QFixed f; f.val = fixed; return f; }
72
73 inline int value() const { return val; }
74 inline void setValue(int value) { val = value; }
75
76 inline int toInt() const { return (((val)+32) & -64)>>6; }
77 inline qreal toReal() const { return ((qreal)val)/(qreal)64; }
78
79 inline int truncate() const { return val>>6; }
80 inline QFixed round() const { QFixed f; f.val = ((val)+32) & -64; return f; }
81 inline QFixed floor() const { QFixed f; f.val = (val) & -64; return f; }
82 inline QFixed ceil() const { QFixed f; f.val = (val+63) & -64; return f; }
83
84 inline QFixed operator+(int i) const { QFixed f; f.val = (val + (i<<6)); return f; }
85 inline QFixed operator+(uint i) const { QFixed f; f.val = (val + (i<<6)); return f; }
86 inline QFixed operator+(const QFixed &other) const { QFixed f; f.val = (val + other.val); return f; }
87 inline QFixed &operator+=(int i) { val += (i<<6); return *this; }
88 inline QFixed &operator+=(uint i) { val += (i<<6); return *this; }
89 inline QFixed &operator+=(const QFixed &other) { val += other.val; return *this; }
90 inline QFixed operator-(int i) const { QFixed f; f.val = (val - (i<<6)); return f; }
91 inline QFixed operator-(uint i) const { QFixed f; f.val = (val - (i<<6)); return f; }
92 inline QFixed operator-(const QFixed &other) const { QFixed f; f.val = (val - other.val); return f; }
93 inline QFixed &operator-=(int i) { val -= (i<<6); return *this; }
94 inline QFixed &operator-=(uint i) { val -= (i<<6); return *this; }
95 inline QFixed &operator-=(const QFixed &other) { val -= other.val; return *this; }
96 inline QFixed operator-() const { QFixed f; f.val = -val; return f; }
97
98 inline bool operator==(const QFixed &other) const { return val == other.val; }
99 inline bool operator!=(const QFixed &other) const { return val != other.val; }
100 inline bool operator<(const QFixed &other) const { return val < other.val; }
101 inline bool operator>(const QFixed &other) const { return val > other.val; }
102 inline bool operator<=(const QFixed &other) const { return val <= other.val; }
103 inline bool operator>=(const QFixed &other) const { return val >= other.val; }
104 inline bool operator!() const { return !val; }
105
106 inline QFixed &operator/=(int x) { val /= x; return *this; }
107 inline QFixed &operator/=(const QFixed &o) {
108 if (o.val == 0) {
109 val = 0x7FFFFFFFL;
110 } else {
111 bool neg = false;
112 qint64 a = val;
113 qint64 b = o.val;
114 if (a < 0) { a = -a; neg = true; }
115 if (b < 0) { b = -b; neg = !neg; }
116
117 int res = (int)(((a << 6) + (b >> 1)) / b);
118
119 val = (neg ? -res : res);
120 }
121 return *this;
122 }
123 inline QFixed operator/(int d) const { QFixed f; f.val = val/d; return f; }
124 inline QFixed operator/(QFixed b) const { QFixed f = *this; return (f /= b); }
125 inline QFixed operator>>(int d) const { QFixed f = *this; f.val >>= d; return f; }
126 inline QFixed &operator*=(int i) { val *= i; return *this; }
127 inline QFixed &operator*=(uint i) { val *= i; return *this; }
128 inline QFixed &operator*=(const QFixed &o) {
129 bool neg = false;
130 qint64 a = val;
131 qint64 b = o.val;
132 if (a < 0) { a = -a; neg = true; }
133 if (b < 0) { b = -b; neg = !neg; }
134
135 int res = (int)((a * b + 0x20L) >> 6);
136 val = neg ? -res : res;
137 return *this;
138 }
139 inline QFixed operator*(int i) const { QFixed f = *this; return (f *= i); }
140 inline QFixed operator*(uint i) const { QFixed f = *this; return (f *= i); }
141 inline QFixed operator*(const QFixed &o) const { QFixed f = *this; return (f *= o); }
142
143private:
144 QFixed(qreal i) : val((int)(i*qreal(64))) {}
145 QFixed &operator=(qreal i) { val = (int)(i*qreal(64)); return *this; }
146 inline QFixed operator+(qreal i) const { QFixed f; f.val = (val + (int)(i*qreal(64))); return f; }
147 inline QFixed &operator+=(qreal i) { val += (int)(i*64); return *this; }
148 inline QFixed operator-(qreal i) const { QFixed f; f.val = (val - (int)(i*qreal(64))); return f; }
149 inline QFixed &operator-=(qreal i) { val -= (int)(i*64); return *this; }
150 inline QFixed &operator/=(qreal r) { val = (int)(val/r); return *this; }
151 inline QFixed operator/(qreal d) const { QFixed f; f.val = (int)(val/d); return f; }
152 inline QFixed &operator*=(qreal d) { val = (int) (val*d); return *this; }
153 inline QFixed operator*(qreal d) const { QFixed f = *this; return (f *= d); }
154 int val;
155};
156Q_DECLARE_TYPEINFO(QFixed, Q_PRIMITIVE_TYPE);
157
158#define QFIXED_MAX (INT_MAX/256)
159
160inline int qRound(const QFixed &f) { return f.toInt(); }
161inline int qFloor(const QFixed &f) { return f.floor().truncate(); }
162
163inline QFixed operator*(int i, const QFixed &d) { return d*i; }
164inline QFixed operator+(int i, const QFixed &d) { return d+i; }
165inline QFixed operator-(int i, const QFixed &d) { return -(d-i); }
166inline QFixed operator*(uint i, const QFixed &d) { return d*i; }
167inline QFixed operator+(uint i, const QFixed &d) { return d+i; }
168inline QFixed operator-(uint i, const QFixed &d) { return -(d-i); }
169// inline QFixed operator*(qreal d, const QFixed &d2) { return d2*d; }
170
171inline bool operator==(const QFixed &f, int i) { return f.value() == (i<<6); }
172inline bool operator==(int i, const QFixed &f) { return f.value() == (i<<6); }
173inline bool operator!=(const QFixed &f, int i) { return f.value() != (i<<6); }
174inline bool operator!=(int i, const QFixed &f) { return f.value() != (i<<6); }
175inline bool operator<=(const QFixed &f, int i) { return f.value() <= (i<<6); }
176inline bool operator<=(int i, const QFixed &f) { return (i<<6) <= f.value(); }
177inline bool operator>=(const QFixed &f, int i) { return f.value() >= (i<<6); }
178inline bool operator>=(int i, const QFixed &f) { return (i<<6) >= f.value(); }
179inline bool operator<(const QFixed &f, int i) { return f.value() < (i<<6); }
180inline bool operator<(int i, const QFixed &f) { return (i<<6) < f.value(); }
181inline bool operator>(const QFixed &f, int i) { return f.value() > (i<<6); }
182inline bool operator>(int i, const QFixed &f) { return (i<<6) > f.value(); }
183
184#ifndef QT_NO_DEBUG_STREAM
185inline QDebug &operator<<(QDebug &dbg, const QFixed &f)
186{ return dbg << f.toReal(); }
187#endif
188
189struct QFixedPoint {
190 QFixed x;
191 QFixed y;
192 inline QFixedPoint() {}
193 inline QFixedPoint(const QFixed &_x, const QFixed &_y) : x(_x), y(_y) {}
194 QPointF toPointF() const { return QPointF(x.toReal(), y.toReal()); }
195 static QFixedPoint fromPointF(const QPointF &p) {
196 return QFixedPoint(QFixed::fromReal(p.x()), QFixed::fromReal(p.y()));
197 }
198};
199Q_DECLARE_TYPEINFO(QFixedPoint, Q_PRIMITIVE_TYPE);
200
201inline QFixedPoint operator-(const QFixedPoint &p1, const QFixedPoint &p2)
202{ return QFixedPoint(p1.x - p2.x, p1.y - p2.y); }
203inline QFixedPoint operator+(const QFixedPoint &p1, const QFixedPoint &p2)
204{ return QFixedPoint(p1.x + p2.x, p1.y + p2.y); }
205
206struct QFixedSize {
207 QFixed width;
208 QFixed height;
209 QSizeF toSizeF() const { return QSizeF(width.toReal(), height.toReal()); }
210 static QFixedSize fromSizeF(const QSizeF &s) {
211 QFixedSize size;
212 size.width = QFixed::fromReal(s.width());
213 size.height = QFixed::fromReal(s.height());
214 return size;
215 }
216};
217Q_DECLARE_TYPEINFO(QFixedSize, Q_PRIMITIVE_TYPE);
218
219QT_END_NAMESPACE
220
221#endif // QTEXTENGINE_P_H
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