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3** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
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40****************************************************************************/
41
42#ifndef QMATRIX_H
43#define QMATRIX_H
44
45#include <QtGui/qpolygon.h>
46#include <QtGui/qregion.h>
47#include <QtGui/qwindowdefs.h>
48#include <QtCore/qline.h>
49#include <QtCore/qpoint.h>
50#include <QtCore/qrect.h>
51
52QT_BEGIN_HEADER
53
54QT_BEGIN_NAMESPACE
55
56QT_MODULE(Gui)
57
58class QPainterPath;
59class QVariant;
60
61class Q_GUI_EXPORT QMatrix // 2D transform matrix
62{
63public:
64 inline explicit QMatrix(Qt::Initialization) {}
65 QMatrix();
66 QMatrix(qreal m11, qreal m12, qreal m21, qreal m22,
67 qreal dx, qreal dy);
68 QMatrix(const QMatrix &matrix);
69
70 void setMatrix(qreal m11, qreal m12, qreal m21, qreal m22,
71 qreal dx, qreal dy);
72
73 qreal m11() const { return _m11; }
74 qreal m12() const { return _m12; }
75 qreal m21() const { return _m21; }
76 qreal m22() const { return _m22; }
77 qreal dx() const { return _dx; }
78 qreal dy() const { return _dy; }
79
80 void map(int x, int y, int *tx, int *ty) const;
81 void map(qreal x, qreal y, qreal *tx, qreal *ty) const;
82 QRect mapRect(const QRect &) const;
83 QRectF mapRect(const QRectF &) const;
84
85 QPoint map(const QPoint &p) const;
86 QPointF map(const QPointF&p) const;
87 QLine map(const QLine &l) const;
88 QLineF map(const QLineF &l) const;
89 QPolygonF map(const QPolygonF &a) const;
90 QPolygon map(const QPolygon &a) const;
91 QRegion map(const QRegion &r) const;
92 QPainterPath map(const QPainterPath &p) const;
93 QPolygon mapToPolygon(const QRect &r) const;
94
95 void reset();
96 inline bool isIdentity() const;
97
98 QMatrix &translate(qreal dx, qreal dy);
99 QMatrix &scale(qreal sx, qreal sy);
100 QMatrix &shear(qreal sh, qreal sv);
101 QMatrix &rotate(qreal a);
102
103 bool isInvertible() const { return !qFuzzyIsNull(_m11*_m22 - _m12*_m21); }
104 qreal determinant() const { return _m11*_m22 - _m12*_m21; }
105#ifdef QT_DEPRECATED
106 QT_DEPRECATED qreal det() const { return _m11*_m22 - _m12*_m21; }
107#endif
108
109 QMatrix inverted(bool *invertible = 0) const;
110
111 bool operator==(const QMatrix &) const;
112 bool operator!=(const QMatrix &) const;
113
114 QMatrix &operator*=(const QMatrix &);
115 QMatrix operator*(const QMatrix &o) const;
116
117 QMatrix &operator=(const QMatrix &);
118
119 operator QVariant() const;
120
121#ifdef QT3_SUPPORT
122 inline QT3_SUPPORT QMatrix invert(bool *invertible=0) const { return inverted(invertible); }
123 inline QT3_SUPPORT QRect map(const QRect &r) const { return mapRect(r); }
124 QT3_SUPPORT QRegion mapToRegion(const QRect &r) const;
125#endif
126
127private:
128 inline QMatrix(bool)
129 : _m11(1.)
130 , _m12(0.)
131 , _m21(0.)
132 , _m22(1.)
133 , _dx(0.)
134 , _dy(0.) {}
135 inline QMatrix(qreal am11, qreal am12, qreal am21, qreal am22, qreal adx, qreal ady, bool)
136 : _m11(am11)
137 , _m12(am12)
138 , _m21(am21)
139 , _m22(am22)
140 , _dx(adx)
141 , _dy(ady) {}
142 friend class QTransform;
143 qreal _m11, _m12;
144 qreal _m21, _m22;
145 qreal _dx, _dy;
146};
147Q_DECLARE_TYPEINFO(QMatrix, Q_MOVABLE_TYPE);
148
149// mathematical semantics
150Q_GUI_EXPORT_INLINE QPoint operator*(const QPoint &p, const QMatrix &m)
151{ return m.map(p); }
152Q_GUI_EXPORT_INLINE QPointF operator*(const QPointF &p, const QMatrix &m)
153{ return m.map(p); }
154Q_GUI_EXPORT_INLINE QLineF operator*(const QLineF &l, const QMatrix &m)
155{ return m.map(l); }
156Q_GUI_EXPORT_INLINE QLine operator*(const QLine &l, const QMatrix &m)
157{ return m.map(l); }
158Q_GUI_EXPORT_INLINE QPolygon operator *(const QPolygon &a, const QMatrix &m)
159{ return m.map(a); }
160Q_GUI_EXPORT_INLINE QPolygonF operator *(const QPolygonF &a, const QMatrix &m)
161{ return m.map(a); }
162Q_GUI_EXPORT_INLINE QRegion operator *(const QRegion &r, const QMatrix &m)
163{ return m.map(r); }
164Q_GUI_EXPORT QPainterPath operator *(const QPainterPath &p, const QMatrix &m);
165
166inline bool QMatrix::isIdentity() const
167{
168 return qFuzzyIsNull(_m11 - 1) && qFuzzyIsNull(_m22 - 1) && qFuzzyIsNull(_m12)
169 && qFuzzyIsNull(_m21) && qFuzzyIsNull(_dx) && qFuzzyIsNull(_dy);
170}
171
172inline bool qFuzzyCompare(const QMatrix& m1, const QMatrix& m2)
173{
174 return qFuzzyCompare(m1.m11(), m2.m11())
175 && qFuzzyCompare(m1.m12(), m2.m12())
176 && qFuzzyCompare(m1.m21(), m2.m21())
177 && qFuzzyCompare(m1.m22(), m2.m22())
178 && qFuzzyCompare(m1.dx(), m2.dx())
179 && qFuzzyCompare(m1.dy(), m2.dy());
180}
181
182
183/*****************************************************************************
184 QMatrix stream functions
185 *****************************************************************************/
186
187#ifndef QT_NO_DATASTREAM
188Q_GUI_EXPORT QDataStream &operator<<(QDataStream &, const QMatrix &);
189Q_GUI_EXPORT QDataStream &operator>>(QDataStream &, QMatrix &);
190#endif
191
192#ifndef QT_NO_DEBUG_STREAM
193Q_GUI_EXPORT QDebug operator<<(QDebug, const QMatrix &);
194#endif
195
196#ifdef QT3_SUPPORT
197QT_BEGIN_INCLUDE_NAMESPACE
198#include <QtGui/qwmatrix.h>
199QT_END_INCLUDE_NAMESPACE
200#endif
201
202QT_END_NAMESPACE
203
204QT_END_HEADER
205
206#endif // QMATRIX_H
207