qwmatrix.h

/****************************************************************************
** $Id: qwmatrix.h,v 2.9 1999/04/28 09:58:14 aavit Exp $
**
** Definition of QWMatrix class
**
** Created : 941020
**
** Copyright (C) 1992-1999 Troll Tech AS.  All rights reserved.
**
** This file is part of the Qt GUI Toolkit.
**
** This file may be distributed under the terms of the Q Public License
** as defined by Troll Tech AS of Norway and appearing in the file
** LICENSE.QPL included in the packaging of this file.
**
** Licensees holding valid Qt Professional Edition licenses may use this
** file in accordance with the Qt Professional Edition License Agreement
** provided with the Qt Professional Edition.
**
** See http://www.troll.no/pricing.html or email sales@troll.no for
** information about the Professional Edition licensing, or see
** http://www.troll.no/qpl/ for QPL licensing information.
**
*****************************************************************************/

#ifndef QWMATRIX_H
#define QWMATRIX_H

#ifndef QT_H
#include "qwindowdefs.h"
#include "qpointarray.h"
#include "qrect.h"
#endif // QT_H


class Q_EXPORT QWMatrix                                 // 2D transform matrix
{
public:
    QWMatrix();
    QWMatrix( double m11, double m12, double m21, double m22,
              double dx, double dy );

    void        setMatrix( double m11, double m12, double m21, double m22,
                           double dx,  double dy );

    double      m11() const { return _m11; }
    double      m12() const { return _m12; }
    double      m21() const { return _m21; }
    double      m22() const { return _m22; }
    double      dx()  const { return _dx; }
    double      dy()  const { return _dy; }

    void        map( int x, int y, int *tx, int *ty )         const;
    void        map( double x, double y, double *tx, double *ty ) const;
    QPoint      map( const QPoint & )   const;
    QRect       map( const QRect & )    const;
    QPointArray map( const QPointArray & ) const;

    void        reset();

    QWMatrix   &translate( double dx, double dy );
    QWMatrix   &scale( double sx, double sy );
    QWMatrix   &shear( double sh, double sv );
    QWMatrix   &rotate( double a );

    QWMatrix    invert( bool * = 0 ) const;

    bool        operator==( const QWMatrix & ) const;
    bool        operator!=( const QWMatrix & ) const;
    QWMatrix   &operator*=( const QWMatrix & );

private:
    QWMatrix   &bmul( const QWMatrix & );
    double      _m11, _m12;
    double      _m21, _m22;
    double      _dx,  _dy;
};


Q_EXPORT QWMatrix operator*( const QWMatrix &, const QWMatrix & );


/*****************************************************************************
  QWMatrix stream functions
 *****************************************************************************/

Q_EXPORT QDataStream &operator<<( QDataStream &, const QWMatrix & );
Q_EXPORT QDataStream &operator>>( QDataStream &, QWMatrix & );


#endif // QWMATRIX_H