qtransform.cpp File Reference

#include "qtransform.h"
#include "qdatastream.h"
#include "qdebug.h"
#include "qhashfunctions.h"
#include "qregion.h"
#include "qpainterpath.h"
#include "qpainterpath_p.h"
#include "qvariant.h"
#include "qmath_p.h"
#include <qnumeric.h>
#include <private/qbezier_p.h>

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Classes
struct	QHomogeneousCoordinate

Macros
#define	Q_NEAR_CLIP   (sizeof(qreal) == sizeof(double) ? 0.000001 : 0.0001)
#define	MAP(x, y, nx, ny)

Functions
QT_BEGIN_NAMESPACE static Q_NEVER_INLINE void	nanWarning (const char *func)
QDataStream &	operator<< (QDataStream &s, const QTransform &m)
QDataStream &	operator>> (QDataStream &s, QTransform &t)
QDebug	operator<< (QDebug dbg, const QTransform &m)
static QPolygonF	mapProjective (const QTransform &transform, const QPolygonF &poly)
QPainterPath	qt_regionToPath (const QRegion &region)
static QHomogeneousCoordinate	mapHomogeneous (const QTransform &transform, const QPointF &p)
static bool	lineTo_clipped (QPainterPath &path, const QTransform &transform, const QPointF &a, const QPointF &b, bool needsMoveTo, bool needsLineTo=true)
Q_GUI_EXPORT bool	qt_scaleForTransform (const QTransform &transform, qreal *scale)
static bool	cubicTo_clipped (QPainterPath &path, const QTransform &transform, const QPointF &a, const QPointF &b, const QPointF &c, const QPointF &d, bool needsMoveTo)
static QPainterPath	mapProjective (const QTransform &transform, const QPainterPath &path)
static bool	needsPerspectiveClipping (const QRectF &rect, const QTransform &transform)
QDataStream &	operator>> (QDataStream &s, QTransform::Affine &m)
QDataStream &	operator<< (QDataStream &s, const QTransform::Affine &m)

Macro Definition Documentation

MAP

#define MAP	(		x,
			y,
			nx,
			ny
	)

Value:

    do { \
        qreal FX_ = x; \
        qreal FY_ = y; \
        switch(t) {   \
        case TxNone:  \
            nx = FX_;   \
            ny = FY_;   \
            break;    \
        case TxTranslate:    \
            nx = FX_ + m_matrix[2][0];                \
            ny = FY_ + m_matrix[2][1];                \
            break;                              \
        case TxScale:                           \
            nx = m_matrix[0][0] * FX_ + m_matrix[2][0];  \
            ny = m_matrix[1][1] * FY_ + m_matrix[2][1];  \
            break;                              \
        case TxRotate:                          \
        case TxShear:                           \
        case TxProject:                                      \
            nx = m_matrix[0][0] * FX_ + m_matrix[1][0] * FY_ + m_matrix[2][0];        \
            ny = m_matrix[0][1] * FX_ + m_matrix[1][1] * FY_ + m_matrix[2][1];        \
            if (t == TxProject) {                                       \
                qreal w = (m_matrix[0][2] * FX_ + m_matrix[1][2] * FY_ + m_matrix[2][2]);              \
                if (w < qreal(Q_NEAR_CLIP)) w = qreal(Q_NEAR_CLIP);     \
                w = 1./w;                                               \
                nx *= w;                                                \
                ny *= w;                                                \
            }                                                           \
        }                                                               \
    } while (0)

Definition at line 32 of file qtransform.cpp.

Q_NEAR_CLIP

#define Q_NEAR_CLIP   (sizeof(qreal) == sizeof(double) ? 0.000001 : 0.0001)

Definition at line 27 of file qtransform.cpp.

Function Documentation

cubicTo_clipped()

static bool cubicTo_clipped ( QPainterPath &  path, const QTransform &  transform, const QPointF &  a, const QPointF &  b, const QPointF &  c, const QPointF &  d, bool  needsMoveTo  )

inlinestatic

Definition at line 1590 of file qtransform.cpp.

References d, QBezier::fromPoints(), i, lineTo_clipped(), qt_scaleForTransform(), and QBezier::toPolygon().

Referenced by mapProjective().

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lineTo_clipped()

static bool lineTo_clipped ( QPainterPath &  path, const QTransform &  transform, const QPointF &  a, const QPointF &  b, bool  needsMoveTo, bool  needsLineTo = true  )

inlinestatic

Definition at line 1549 of file qtransform.cpp.

References mapHomogeneous(), Q_NEAR_CLIP, QHomogeneousCoordinate::toPoint(), QHomogeneousCoordinate::w, QHomogeneousCoordinate::x, and QHomogeneousCoordinate::y.

Referenced by cubicTo_clipped(), and mapProjective().

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mapHomogeneous()

static QHomogeneousCoordinate mapHomogeneous ( const QTransform &  transform, const QPointF &  p  )

inlinestatic

Definition at line 1540 of file qtransform.cpp.

Referenced by lineTo_clipped().

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mapProjective() [1/2]

static QPainterPath mapProjective ( const QTransform &  transform, const QPainterPath &  path  )

static

Definition at line 1609 of file qtransform.cpp.

References cubicTo_clipped(), QPainterPath::CurveToElement, i, lineTo_clipped(), QPainterPath::LineToElement, QPainterPath::MoveToElement, and Q_ASSERT.

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mapProjective() [2/2]

static QPolygonF mapProjective ( const QTransform &  transform, const QPolygonF &  poly  )

static

Definition at line 1367 of file qtransform.cpp.

References QList< T >::at(), i, and QList< T >::size().

Referenced by QTransform::map(), QTransform::map(), and QTransform::map().

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nanWarning()

QT_BEGIN_NAMESPACE static Q_NEVER_INLINE void nanWarning ( const char *  func )

static

Definition at line 21 of file qtransform.cpp.

References qWarning.

Referenced by QTransform::fromScale(), QTransform::fromTranslate(), QTransform::rotate(), QTransform::rotateRadians(), QTransform::scale(), QTransform::shear(), and QTransform::translate().

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needsPerspectiveClipping()

static bool needsPerspectiveClipping ( const QRectF &  rect, const QTransform &  transform  )

inlinestatic

Definition at line 1885 of file qtransform.cpp.

References Q_NEAR_CLIP, qMin(), and rect.

Referenced by QTransform::mapRect(), and QTransform::mapRect().

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operator<<() [1/3]

QDataStream & operator<< ( QDataStream &  s, const QTransform &  m  )

related

Definition at line 1052 of file qtransform.cpp.

operator<<() [2/3]

QDataStream & operator<<	(	QDataStream &	s,
		const QTransform::Affine &	m
	)

Definition at line 2368 of file qtransform.cpp.

operator<<() [3/3]

QDebug operator<<	(	QDebug	dbg,
		const QTransform &	m
	)

Definition at line 1100 of file qtransform.cpp.

References typeStr().

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operator>>() [1/2]

QDataStream & operator>> ( QDataStream &  s, QTransform &  t  )

related

Definition at line 1076 of file qtransform.cpp.

operator>>() [2/2]

QDataStream & operator>>	(	QDataStream &	s,
		QTransform::Affine &	m
	)

Definition at line 2342 of file qtransform.cpp.

qt_regionToPath()

QPainterPath qt_regionToPath

(

const QRegion &

region

)

Definition at line 1007 of file qregion.cpp.

qt_scaleForTransform()

Q_GUI_EXPORT bool qt_scaleForTransform	(	const QTransform &	transform,
		qreal *	scale
	)

Definition at line 2301 of file qtransform.cpp.

References qAbs(), qFuzzyCompare(), qMax(), qSqrt(), QTransform::TxRotate, QTransform::TxScale, and QTransform::TxTranslate.

Referenced by cubicTo_clipped(), QCoreTextFontEngine::draw(), QPixmapBlurFilter::draw(), QCoreTextFontEngine::imageForGlyph(), QStrokerOps::setCurveThresholdFromTransform(), QOutlineMapper::setMatrix(), QOpenGL2PaintEngineEx::stroke(), QRasterPaintEngine::updateMatrix(), and QX11PaintEngine::updateMatrix().

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