qtransform.cpp File Reference

(5b9ce5d1298f5dffd986b422857cd1624693cabd)

#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)
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)
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 = qreal(1.)/w;                                        \
                nx *= w;                                                \
                ny *= w;                                                \
            }                                                           \
        }                                                               \
    } while (0)

Definition at line 32 of file qtransform.cpp.

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

Q_NEAR_CLIP

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

Definition at line 27 of file qtransform.cpp.

Referenced by lineTo_clipped().

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 1454 of file qtransform.cpp.

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

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 1413 of file qtransform.cpp.

References mapHomogeneous(), Q_NEAR_CLIP, and QPointF::toPoint().

Referenced by cubicTo_clipped(), and mapProjective().

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mapHomogeneous()

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

inlinestatic

Definition at line 1404 of file qtransform.cpp.

Referenced by lineTo_clipped().

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mapProjective()

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

static

Definition at line 1473 of file qtransform.cpp.

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

Referenced by 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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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 2215 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 2189 of file qtransform.cpp.

qt_regionToPath()

QPainterPath qt_regionToPath ( const QRegion & region )

extern

Definition at line 1007 of file qregion.cpp.

qt_scaleForTransform()

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

Definition at line 2148 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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