/****************************************************************************

**

** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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** Contact: Nokia Corporation (qt-info@nokia.com)

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** This file is part of the QtGui module of the Qt Toolkit.

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** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** 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

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**

** 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.

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** If you have questions regarding the use of this file, please contact

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** $QT_END_LICENSE$

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****************************************************************************/

#ifndef QMATRIX_H

#define QMATRIX_H

#include <QtGui/qpolygon.h>

#include <QtGui/qregion.h>

#include <QtGui/qwindowdefs.h>

#include <QtCore/qline.h>

#include <QtCore/qpoint.h>

#include <QtCore/qrect.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Gui)

class QPainterPath;

class QVariant;

class Q_GUI_EXPORT QMatrix // 2D transform matrix

{

public:

    inline explicit QMatrix(Qt::Initialization) {}

    QMatrix();

    QMatrix(qreal m11, qreal m12, qreal m21, qreal m22,

            qreal dx, qreal dy);

    QMatrix(const QMatrix &matrix);

    void setMatrix(qreal m11, qreal m12, qreal m21, qreal m22,

                   qreal dx, qreal dy);

    qreal m11() const { return _m11; }

    qreal m12() const { return _m12; }

    qreal m21() const { return _m21; }

    qreal m22() const { return _m22; }

    qreal dx() const { return _dx; }

    qreal dy() const { return _dy; }

    void map(int x, int y, int *tx, int *ty) const;

    void map(qreal x, qreal y, qreal *tx, qreal *ty) const;

    QRect mapRect(const QRect &) const;

    QRectF mapRect(const QRectF &) const;

    QPoint map(const QPoint &p) const;

    QPointF map(const QPointF&p) const;

    QLine map(const QLine &l) const;

    QLineF map(const QLineF &l) const;

    QPolygonF map(const QPolygonF &a) const;

    QPolygon map(const QPolygon &a) const;

    QRegion map(const QRegion &r) const;

    QPainterPath map(const QPainterPath &p) const;

    QPolygon mapToPolygon(const QRect &r) const;

    void reset();

    inline bool isIdentity() const;

    QMatrix &translate(qreal dx, qreal dy);

    QMatrix &scale(qreal sx, qreal sy);

    QMatrix &shear(qreal sh, qreal sv);

    QMatrix &rotate(qreal a);

    bool isInvertible() const { return !qFuzzyIsNull(_m11*_m22 - _m12*_m21); }

    QMatrix inverted(bool *invertible = 0) const;

    bool operator==(const QMatrix &) const;

    bool operator!=(const QMatrix &) const;

    QMatrix &operator*=(const QMatrix &);

    QMatrix operator*(const QMatrix &o) const;

    QMatrix &operator=(const QMatrix &);

    operator QVariant() const;

#ifdef QT3_SUPPORT

    inline QT3_SUPPORT QMatrix invert(bool *invertible=0) const { return inverted(invertible); }

    inline QT3_SUPPORT QRect map(const QRect &r) const { return mapRect(r); }

    QT3_SUPPORT QRegion mapToRegion(const QRect &r) const;

#endif

private:

    inline QMatrix(bool)

            : _m11(1.)

            , _m12(0.)

            , _m21(0.)

            , _m22(1.)

            , _dx(0.)

            , _dy(0.) {}

    inline QMatrix(qreal am11, qreal am12, qreal am21, qreal am22, qreal adx, qreal ady, bool)

            : _m11(am11)

            , _m12(am12)

            , _m21(am21)

            , _m22(am22)

            , _dx(adx)

            , _dy(ady) {}

    friend class QTransform;

    qreal _m11, _m12;

    qreal _m21, _m22;

    qreal _dx, _dy;

};

Q_DECLARE_TYPEINFO(QMatrix, Q_MOVABLE_TYPE);

// mathematical semantics

Q_GUI_EXPORT_INLINE QPoint operator*(const QPoint &p, const QMatrix &m)

{ return m.map(p); }

Q_GUI_EXPORT_INLINE QPointF operator*(const QPointF &p, const QMatrix &m)

{ return m.map(p); }

Q_GUI_EXPORT_INLINE QLineF operator*(const QLineF &l, const QMatrix &m)

{ return m.map(l); }

Q_GUI_EXPORT_INLINE QLine operator*(const QLine &l, const QMatrix &m)

{ return m.map(l); }

Q_GUI_EXPORT_INLINE QPolygon operator *(const QPolygon &a, const QMatrix &m)

{ return m.map(a); }

Q_GUI_EXPORT_INLINE QPolygonF operator *(const QPolygonF &a, const QMatrix &m)

{ return m.map(a); }

Q_GUI_EXPORT_INLINE QRegion operator *(const QRegion &r, const QMatrix &m)

{ return m.map(r); }

Q_GUI_EXPORT QPainterPath operator *(const QPainterPath &p, const QMatrix &m);

inline bool QMatrix::isIdentity() const

{

    return qFuzzyIsNull(_m11 - 1) && qFuzzyIsNull(_m22 - 1) && qFuzzyIsNull(_m12)

           && qFuzzyIsNull(_m21) && qFuzzyIsNull(_dx) && qFuzzyIsNull(_dy);

}

inline bool qFuzzyCompare(const QMatrix& m1, const QMatrix& m2)

{

    return qFuzzyCompare(m1.m11(), m2.m11())

        && qFuzzyCompare(m1.m12(), m2.m12())

        && qFuzzyCompare(m1.m21(), m2.m21())

        && qFuzzyCompare(m1.m22(), m2.m22())

        && qFuzzyCompare(m1.dx(), m2.dx())

        && qFuzzyCompare(m1.dy(), m2.dy());

}

/*****************************************************************************

 QMatrix stream functions

 *****************************************************************************/

#ifndef QT_NO_DATASTREAM

Q_GUI_EXPORT QDataStream &operator<<(QDataStream &, const QMatrix &);

Q_GUI_EXPORT QDataStream &operator>>(QDataStream &, QMatrix &);

#endif

#ifndef QT_NO_DEBUG_STREAM

Q_GUI_EXPORT QDebug operator<<(QDebug, const QMatrix &);

#endif

#ifdef QT3_SUPPORT

QT_BEGIN_INCLUDE_NAMESPACE

#include <QtGui/qwmatrix.h>

QT_END_INCLUDE_NAMESPACE

#endif

QT_END_NAMESPACE

QT_END_HEADER

#endif // QMATRIX_H