source: trunk/src/gui/painting/qfixed_p.h@ 708

/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation ([email protected])
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at [email protected].
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QFIXED_P_H
#define QFIXED_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists for the convenience
// of other Qt classes.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include "QtCore/qdebug.h"
#include "QtCore/qpoint.h"
#include "QtCore/qsize.h"

QT_BEGIN_NAMESPACE

struct QFixed {
public:
    QFixed() : val(0) {}
    QFixed(int i) : val(i<<6) {}
    QFixed(long i) : val(i<<6) {}
    QFixed &operator=(int i) { val = (i<<6); return *this; }
    QFixed &operator=(long i) { val = (i<<6); return *this; }

    static QFixed fromReal(qreal r) { QFixed f; f.val = (int)(r*qreal(64)); return f; }
    static QFixed fromFixed(int fixed) { QFixed f; f.val = fixed; return f; }

    inline int value() const { return val; }
    inline void setValue(int value) { val = value; }

    inline int toInt() const { return (((val)+32) & -64)>>6; }
    inline qreal toReal() const { return ((qreal)val)/(qreal)64; }

    inline int truncate() const { return val>>6; }
    inline QFixed round() const { QFixed f; f.val = ((val)+32) & -64; return f; }
    inline QFixed floor() const { QFixed f; f.val = (val) & -64; return f; }
    inline QFixed ceil() const { QFixed f; f.val = (val+63) & -64; return f; }

    inline QFixed operator+(int i) const { QFixed f; f.val = (val + (i<<6)); return f; }
    inline QFixed operator+(uint i) const { QFixed f; f.val = (val + (i<<6)); return f; }
    inline QFixed operator+(const QFixed &other) const { QFixed f; f.val = (val + other.val); return f; }
    inline QFixed &operator+=(int i) { val += (i<<6); return *this; }
    inline QFixed &operator+=(uint i) { val += (i<<6); return *this; }
    inline QFixed &operator+=(const QFixed &other) { val += other.val; return *this; }
    inline QFixed operator-(int i) const { QFixed f; f.val = (val - (i<<6)); return f; }
    inline QFixed operator-(uint i) const { QFixed f; f.val = (val - (i<<6)); return f; }
    inline QFixed operator-(const QFixed &other) const { QFixed f; f.val = (val - other.val); return f; }
    inline QFixed &operator-=(int i) { val -= (i<<6); return *this; }
    inline QFixed &operator-=(uint i) { val -= (i<<6); return *this; }
    inline QFixed &operator-=(const QFixed &other) { val -= other.val; return *this; }
    inline QFixed operator-() const { QFixed f; f.val = -val; return f; }

    inline bool operator==(const QFixed &other) const { return val == other.val; }
    inline bool operator!=(const QFixed &other) const { return val != other.val; }
    inline bool operator<(const QFixed &other) const { return val < other.val; }
    inline bool operator>(const QFixed &other) const { return val > other.val; }
    inline bool operator<=(const QFixed &other) const { return val <= other.val; }
    inline bool operator>=(const QFixed &other) const { return val >= other.val; }
    inline bool operator!() const { return !val; }

    inline QFixed &operator/=(int x) { val /= x; return *this; }
    inline QFixed &operator/=(const QFixed &o) {
        if (o.val == 0) {
            val = 0x7FFFFFFFL;