Long live Qt 4.5!

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diff --git a/src/gui/painting/qmatrix.h b/src/gui/painting/qmatrix.h
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, 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 are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#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:
+    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 !qFuzzyCompare(_m11*_m22 - _m12*_m21 + 1, 1); }
+    qreal det() const { return _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:
+    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 qFuzzyCompare(_m11, 1) && qFuzzyCompare(_m22, 1) && qFuzzyCompare(_m12 + 1, 1)
+           && qFuzzyCompare(_m21 + 1, 1) && qFuzzyCompare(_dx + 1, 1) && qFuzzyCompare(_dy + 1, 1);
+}
+
+/*****************************************************************************
+ QMatrix stream functions
+ *****************************************************************************/
+
+Q_GUI_EXPORT QDataStream &operator<<(QDataStream &, const QMatrix &);
+Q_GUI_EXPORT QDataStream &operator>>(QDataStream &, QMatrix &);
+
+#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