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Diffstat (limited to 'src/gui/painting/qtransform.h')
| -rw-r--r-- | src/gui/painting/qtransform.h | 354 |
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diff --git a/src/gui/painting/qtransform.h b/src/gui/painting/qtransform.h new file mode 100644 index 0000000..c76409b --- /dev/null +++ b/src/gui/painting/qtransform.h @@ -0,0 +1,354 @@ +/**************************************************************************** +** +** 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 QTRANSFORM_H +#define QTRANSFORM_H + +#include <QtGui/qmatrix.h> +#include <QtGui/qpainterpath.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 QVariant; + +class Q_GUI_EXPORT QTransform +{ + Q_ENUMS(TransformationType) +public: + enum TransformationType { + TxNone = 0x00, + TxTranslate = 0x01, + TxScale = 0x02, + TxRotate = 0x04, + TxShear = 0x08, + TxProject = 0x10 + }; + + QTransform(); + QTransform(qreal h11, qreal h12, qreal h13, + qreal h21, qreal h22, qreal h23, + qreal h31, qreal h32, qreal h33 = 1.0); + QTransform(qreal h11, qreal h12, qreal h21, + qreal h22, qreal dx, qreal dy); + explicit QTransform(const QMatrix &mtx); + + bool isAffine() const; + bool isIdentity() const; + bool isInvertible() const; + bool isScaling() const; + bool isRotating() const; + bool isTranslating() const; + + TransformationType type() const; + + inline qreal determinant() const; + qreal det() const; + + qreal m11() const; + qreal m12() const; + qreal m13() const; + qreal m21() const; + qreal m22() const; + qreal m23() const; + qreal m31() const; + qreal m32() const; + qreal m33() const; + qreal dx() const; + qreal dy() const; + + void setMatrix(qreal m11, qreal m12, qreal m13, + qreal m21, qreal m22, qreal m23, + qreal m31, qreal m32, qreal m33); + + QTransform inverted(bool *invertible = 0) const; + QTransform adjoint() const; + QTransform transposed() const; + + QTransform &translate(qreal dx, qreal dy); + QTransform &scale(qreal sx, qreal sy); + QTransform &shear(qreal sh, qreal sv); + QTransform &rotate(qreal a, Qt::Axis axis = Qt::ZAxis); + QTransform &rotateRadians(qreal a, Qt::Axis axis = Qt::ZAxis); + + static bool squareToQuad(const QPolygonF &square, QTransform &result); + static bool quadToSquare(const QPolygonF &quad, QTransform &result); + static bool quadToQuad(const QPolygonF &one, + const QPolygonF &two, + QTransform &result); + + bool operator==(const QTransform &) const; + bool operator!=(const QTransform &) const; + + QTransform &operator*=(const QTransform &); + QTransform operator*(const QTransform &o) const; + + QTransform &operator=(const QTransform &); + + operator QVariant() const; + + void reset(); + 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; + QRect mapRect(const QRect &) const; + QRectF mapRect(const QRectF &) const; + void map(int x, int y, int *tx, int *ty) const; + void map(qreal x, qreal y, qreal *tx, qreal *ty) const; + + const QMatrix &toAffine() const; + + QTransform &operator*=(qreal div); + QTransform &operator/=(qreal div); + QTransform &operator+=(qreal div); + QTransform &operator-=(qreal div); + + static QTransform fromTranslate(qreal dx, qreal dy); + static QTransform fromScale(qreal dx, qreal dy); + +private: + QMatrix affine; + qreal m_13; + qreal m_23; + qreal m_33; + + mutable uint m_type : 5; + mutable uint m_dirty : 5; + + class Private; + Private *d; +}; +Q_DECLARE_TYPEINFO(QTransform, Q_MOVABLE_TYPE); + +/******* inlines *****/ +inline bool QTransform::isAffine() const +{ + return type() < TxProject; +} +inline bool QTransform::isIdentity() const +{ + return type() == TxNone; +} + +inline bool QTransform::isInvertible() const +{ + return !qFuzzyCompare(determinant() + 1, 1); +} + +inline bool QTransform::isScaling() const +{ + return type() >= TxScale; +} +inline bool QTransform::isRotating() const +{ + return type() >= TxRotate; +} + +inline bool QTransform::isTranslating() const +{ + return type() >= TxTranslate; +} + +inline qreal QTransform::determinant() const +{ + return affine._m11*(m_33*affine._m22-affine._dy*m_23) - + affine._m21*(m_33*affine._m12-affine._dy*m_13)+affine._dx*(m_23*affine._m12-affine._m22*m_13); +} +inline qreal QTransform::det() const +{ + return determinant(); +} +inline qreal QTransform::m11() const +{ + return affine._m11; +} +inline qreal QTransform::m12() const +{ + return affine._m12; +} +inline qreal QTransform::m13() const +{ + return m_13; +} +inline qreal QTransform::m21() const +{ + return affine._m21; +} +inline qreal QTransform::m22() const +{ + return affine._m22; +} +inline qreal QTransform::m23() const +{ + return m_23; +} +inline qreal QTransform::m31() const +{ + return affine._dx; +} +inline qreal QTransform::m32() const +{ + return affine._dy; +} +inline qreal QTransform::m33() const +{ + return m_33; +} +inline qreal QTransform::dx() const +{ + return affine._dx; +} +inline qreal QTransform::dy() const +{ + return affine._dy; +} + +inline QTransform &QTransform::operator*=(qreal num) +{ + if (num == 1.) + return *this; + affine._m11 *= num; + affine._m12 *= num; + m_13 *= num; + affine._m21 *= num; + affine._m22 *= num; + m_23 *= num; + affine._dx *= num; + affine._dy *= num; + m_33 *= num; + m_dirty |= TxScale; + return *this; +} +inline QTransform &QTransform::operator/=(qreal div) +{ + if (div == 0) + return *this; + div = 1/div; + return operator*=(div); +} +inline QTransform &QTransform::operator+=(qreal num) +{ + if (num == 0) + return *this; + affine._m11 += num; + affine._m12 += num; + m_13 += num; + affine._m21 += num; + affine._m22 += num; + m_23 += num; + affine._dx += num; + affine._dy += num; + m_33 += num; + m_dirty |= TxProject; + return *this; +} +inline QTransform &QTransform::operator-=(qreal num) +{ + if (num == 0) + return *this; + affine._m11 -= num; + affine._m12 -= num; + m_13 -= num; + affine._m21 -= num; + affine._m22 -= num; + m_23 -= num; + affine._dx -= num; + affine._dy -= num; + m_33 -= num; + m_dirty |= TxProject; + return *this; +} + +/****** stream functions *******************/ +Q_GUI_EXPORT QDataStream &operator<<(QDataStream &, const QTransform &); +Q_GUI_EXPORT QDataStream &operator>>(QDataStream &, QTransform &); + +#ifndef QT_NO_DEBUG_STREAM +Q_GUI_EXPORT QDebug operator<<(QDebug, const QTransform &); +#endif +/****** end stream functions *******************/ + +// mathematical semantics +Q_GUI_EXPORT_INLINE QPoint operator*(const QPoint &p, const QTransform &m) +{ return m.map(p); } +Q_GUI_EXPORT_INLINE QPointF operator*(const QPointF &p, const QTransform &m) +{ return m.map(p); } +Q_GUI_EXPORT_INLINE QLineF operator*(const QLineF &l, const QTransform &m) +{ return m.map(l); } +Q_GUI_EXPORT_INLINE QLine operator*(const QLine &l, const QTransform &m) +{ return m.map(l); } +Q_GUI_EXPORT_INLINE QPolygon operator *(const QPolygon &a, const QTransform &m) +{ return m.map(a); } +Q_GUI_EXPORT_INLINE QPolygonF operator *(const QPolygonF &a, const QTransform &m) +{ return m.map(a); } +Q_GUI_EXPORT_INLINE QRegion operator *(const QRegion &r, const QTransform &m) +{ return m.map(r); } +Q_GUI_EXPORT_INLINE QPainterPath operator *(const QPainterPath &p, const QTransform &m) +{ return m.map(p); } + +Q_GUI_EXPORT_INLINE QTransform operator *(const QTransform &a, qreal n) +{ QTransform t(a); t *= n; return t; } +Q_GUI_EXPORT_INLINE QTransform operator /(const QTransform &a, qreal n) +{ QTransform t(a); t /= n; return t; } +Q_GUI_EXPORT_INLINE QTransform operator +(const QTransform &a, qreal n) +{ QTransform t(a); t += n; return t; } +Q_GUI_EXPORT_INLINE QTransform operator -(const QTransform &a, qreal n) +{ QTransform t(a); t -= n; return t; } + +QT_END_NAMESPACE + +QT_END_HEADER + +#endif |