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#ifndef QMATRIX_H

#define QMATRIX_H

#include <QtGui/qtguiglobal.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_NAMESPACE

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);

#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)

    // ### Qt 6: remove; the compiler-generated ones are fine!

    QMatrix &operator=(QMatrix &&other) noexcept // = default

    { memcpy(static_cast<void *>(this), static_cast<void *>(&other), sizeof(QMatrix)); return *this; }

    QMatrix &operator=(const QMatrix &) noexcept; // = default

    QMatrix(QMatrix &&other) noexcept // = default

    { memcpy(static_cast<void *>(this), static_cast<void *>(&other), sizeof(QMatrix)); }

    QMatrix(const QMatrix &other) noexcept; // = default

#endif

    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); }

    qreal determinant() const { return _m11*_m22 - _m12*_m21; }

    Q_REQUIRED_RESULT QMatrix inverted(bool *invertible = nullptr) const;

    bool operator==(const QMatrix &) const;

    bool operator!=(const QMatrix &) const;

    QMatrix &operator*=(const QMatrix &);

    QMatrix operator*(const QMatrix &o) const;

    operator QVariant() const;

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);

Q_GUI_EXPORT Q_DECL_CONST_FUNCTION uint qHash(const QMatrix &key, uint seed = 0) noexcept;

// mathematical semantics

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

{ return m.map(p); }

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

{ return m.map(p); }

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

{ return m.map(l); }

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

{ return m.map(l); }

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

{ return m.map(a); }

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

{ return m.map(a); }

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

QT_END_NAMESPACE

#endif // QMATRIX_H