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195 lines
6.7 KiB
C++
195 lines
6.7 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the QtGui module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 3 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL3 included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 3 requirements
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** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 2.0 or (at your option) the GNU General
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** Public license version 3 or any later version approved by the KDE Free
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** Qt Foundation. The licenses are as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-2.0.html and
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** https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QMATRIX_H
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#define QMATRIX_H
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#include <QtGui/qtguiglobal.h>
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#include <QtGui/qpolygon.h>
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#include <QtGui/qregion.h>
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#include <QtGui/qwindowdefs.h>
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#include <QtCore/qline.h>
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#include <QtCore/qpoint.h>
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#include <QtCore/qrect.h>
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QT_BEGIN_NAMESPACE
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class QPainterPath;
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class QVariant;
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class Q_GUI_EXPORT QMatrix // 2D transform matrix
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{
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public:
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inline explicit QMatrix(Qt::Initialization) {}
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QMatrix();
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QMatrix(qreal m11, qreal m12, qreal m21, qreal m22,
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qreal dx, qreal dy);
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#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
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// ### Qt 6: remove; the compiler-generated ones are fine!
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QMatrix &operator=(QMatrix &&other) noexcept // = default
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{ memcpy(static_cast<void *>(this), static_cast<void *>(&other), sizeof(QMatrix)); return *this; }
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QMatrix &operator=(const QMatrix &) noexcept; // = default
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QMatrix(QMatrix &&other) noexcept // = default
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{ memcpy(static_cast<void *>(this), static_cast<void *>(&other), sizeof(QMatrix)); }
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QMatrix(const QMatrix &other) noexcept; // = default
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#endif
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void setMatrix(qreal m11, qreal m12, qreal m21, qreal m22,
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qreal dx, qreal dy);
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qreal m11() const { return _m11; }
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qreal m12() const { return _m12; }
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qreal m21() const { return _m21; }
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qreal m22() const { return _m22; }
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qreal dx() const { return _dx; }
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qreal dy() const { return _dy; }
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void map(int x, int y, int *tx, int *ty) const;
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void map(qreal x, qreal y, qreal *tx, qreal *ty) const;
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QRect mapRect(const QRect &) const;
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QRectF mapRect(const QRectF &) const;
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QPoint map(const QPoint &p) const;
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QPointF map(const QPointF&p) const;
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QLine map(const QLine &l) const;
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QLineF map(const QLineF &l) const;
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QPolygonF map(const QPolygonF &a) const;
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QPolygon map(const QPolygon &a) const;
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QRegion map(const QRegion &r) const;
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QPainterPath map(const QPainterPath &p) const;
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QPolygon mapToPolygon(const QRect &r) const;
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void reset();
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inline bool isIdentity() const;
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QMatrix &translate(qreal dx, qreal dy);
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QMatrix &scale(qreal sx, qreal sy);
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QMatrix &shear(qreal sh, qreal sv);
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QMatrix &rotate(qreal a);
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bool isInvertible() const { return !qFuzzyIsNull(_m11*_m22 - _m12*_m21); }
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qreal determinant() const { return _m11*_m22 - _m12*_m21; }
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Q_REQUIRED_RESULT QMatrix inverted(bool *invertible = nullptr) const;
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bool operator==(const QMatrix &) const;
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bool operator!=(const QMatrix &) const;
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QMatrix &operator*=(const QMatrix &);
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QMatrix operator*(const QMatrix &o) const;
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operator QVariant() const;
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private:
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inline QMatrix(bool)
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: _m11(1.)
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, _m12(0.)
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, _m21(0.)
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, _m22(1.)
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, _dx(0.)
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, _dy(0.) {}
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inline QMatrix(qreal am11, qreal am12, qreal am21, qreal am22, qreal adx, qreal ady, bool)
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: _m11(am11)
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, _m12(am12)
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, _m21(am21)
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, _m22(am22)
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, _dx(adx)
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, _dy(ady) {}
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friend class QTransform;
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qreal _m11, _m12;
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qreal _m21, _m22;
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qreal _dx, _dy;
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};
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Q_DECLARE_TYPEINFO(QMatrix, Q_MOVABLE_TYPE);
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Q_GUI_EXPORT Q_DECL_CONST_FUNCTION uint qHash(const QMatrix &key, uint seed = 0) noexcept;
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// mathematical semantics
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inline QPoint operator*(const QPoint &p, const QMatrix &m)
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{ return m.map(p); }
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inline QPointF operator*(const QPointF &p, const QMatrix &m)
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{ return m.map(p); }
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inline QLineF operator*(const QLineF &l, const QMatrix &m)
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{ return m.map(l); }
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inline QLine operator*(const QLine &l, const QMatrix &m)
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{ return m.map(l); }
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inline QPolygon operator *(const QPolygon &a, const QMatrix &m)
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{ return m.map(a); }
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inline QPolygonF operator *(const QPolygonF &a, const QMatrix &m)
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{ return m.map(a); }
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inline QRegion operator *(const QRegion &r, const QMatrix &m)
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{ return m.map(r); }
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Q_GUI_EXPORT QPainterPath operator *(const QPainterPath &p, const QMatrix &m);
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inline bool QMatrix::isIdentity() const
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{
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return qFuzzyIsNull(_m11 - 1) && qFuzzyIsNull(_m22 - 1) && qFuzzyIsNull(_m12)
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&& qFuzzyIsNull(_m21) && qFuzzyIsNull(_dx) && qFuzzyIsNull(_dy);
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}
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inline bool qFuzzyCompare(const QMatrix& m1, const QMatrix& m2)
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{
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return qFuzzyCompare(m1.m11(), m2.m11())
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&& qFuzzyCompare(m1.m12(), m2.m12())
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&& qFuzzyCompare(m1.m21(), m2.m21())
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&& qFuzzyCompare(m1.m22(), m2.m22())
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&& qFuzzyCompare(m1.dx(), m2.dx())
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&& qFuzzyCompare(m1.dy(), m2.dy());
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}
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/*****************************************************************************
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QMatrix stream functions
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*****************************************************************************/
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#ifndef QT_NO_DATASTREAM
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Q_GUI_EXPORT QDataStream &operator<<(QDataStream &, const QMatrix &);
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Q_GUI_EXPORT QDataStream &operator>>(QDataStream &, QMatrix &);
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#endif
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#ifndef QT_NO_DEBUG_STREAM
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Q_GUI_EXPORT QDebug operator<<(QDebug, const QMatrix &);
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#endif
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QT_END_NAMESPACE
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#endif // QMATRIX_H
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