qrasterizer.cpp File Reference

#include "qrasterizer_p.h"
#include <QPoint>
#include <QRect>
#include <private/qmath_p.h>
#include <private/qdatabuffer_p.h>
#include <private/qdrawhelper_p.h>
#include <QtGui/qpainterpath.h>
#include <algorithm>

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Classes
class	QSpanBuffer
class	QScanConverter
struct	QScanConverter::Line
class	QRasterizerPrivate

Macros
#define	QScFixedToFloat(i)   ((i) * (1./65536.))
#define	FloatToQScFixed(i)   (QScFixed)((i) * 65536.)
#define	IntToQScFixed(i)   ((QScFixed)(i) * (1 << 16))
#define	QScFixedToInt(i)   ((i) >> 16)
#define	QScFixedFactor   65536
#define	FTPosToQScFixed(i)   ((QScFixed)(i) * (1 << 10))
#define	QScFixedMultiply(x, y)   (QScFixed)((qlonglong(x) * qlonglong(y)) >> 16)
#define	QScFixedFastMultiply(x, y)   (((x) * (y)) >> 16)
#define	SPAN_BUFFER_SIZE   256
#define	COORD_ROUNDING   1
#define	COORD_OFFSET   32
#define	CHUNK_SIZE   64
#define	DO_SEGMENT(next, li, ri, ls, rs)

Functions
static QT_FT_Vector	PointToVector (const QPointF &p)
static void	split (QT_FT_Vector *b)
static QScFixed	intersectPixelFP (int x, QScFixed top, QScFixed bottom, QScFixed leftIntersectX, QScFixed rightIntersectX, QScFixed slope, QScFixed invSlope)
static bool	q26Dot6Compare (qreal p1, qreal p2)
static QPointF	snapTo26Dot6Grid (const QPointF &p)
static qreal	qSafeDivide (qreal x, qreal y)
static QScFixed	qSafeFloatToQScFixed (qreal x)
static bool	qClipLine (QPointF *pt1, QPointF *pt2, const QRectF &clip)

Variables
QT_BEGIN_NAMESPACE typedef int	QScFixed

Macro Definition Documentation

CHUNK_SIZE

#define CHUNK_SIZE   64

Definition at line 96 of file qrasterizer.cpp.

COORD_OFFSET

#define COORD_OFFSET   32

Definition at line 37 of file qrasterizer.cpp.

COORD_ROUNDING

#define COORD_ROUNDING   1

Definition at line 36 of file qrasterizer.cpp.

DO_SEGMENT

#define DO_SEGMENT	(		next,
			li,
			ri,
			ls,
			rs
	)

Value:

            ny = qMin(next + 1, d->clipRect.top()); \
            if (y < ny) { \
                li += ls * (ny - y); \
                ri += rs * (ny - y); \
                y = ny; \
            } \
            if (next > d->clipRect.bottom()) \
                next = d->clipRect.bottom(); \
            for (; y <= next; ++y) { \
                const int x1 = qMax(QScFixedToInt(li), d->clipRect.left()); \
                const int x2 = qMin(QScFixedToInt(ri), d->clipRect.right()); \
                if (x2 >= x1) \
                    buffer.addSpan(x1, x2 - x1 + 1, y, 255); \
                li += ls; \
                ri += rs; \
             }

FloatToQScFixed

#define FloatToQScFixed

(

i

)

(QScFixed)((i) * 65536.)

Definition at line 25 of file qrasterizer.cpp.

FTPosToQScFixed

#define FTPosToQScFixed

(

i

)

((QScFixed)(i) * (1 << 10))

Definition at line 29 of file qrasterizer.cpp.

IntToQScFixed

#define IntToQScFixed

(

i

)

((QScFixed)(i) * (1 << 16))

Definition at line 26 of file qrasterizer.cpp.

QScFixedFactor

#define QScFixedFactor   65536

Definition at line 28 of file qrasterizer.cpp.

QScFixedFastMultiply

#define QScFixedFastMultiply	(		x,
			y
	)		(((x) * (y)) >> 16)

Definition at line 32 of file qrasterizer.cpp.

QScFixedMultiply

#define QScFixedMultiply	(		x,
			y
	)		(QScFixed)((qlonglong(x) * qlonglong(y)) >> 16)

Definition at line 31 of file qrasterizer.cpp.

QScFixedToFloat

#define QScFixedToFloat

(

i

)

((i) * (1./65536.))

Definition at line 24 of file qrasterizer.cpp.

QScFixedToInt

#define QScFixedToInt

(

i

)

((i) >> 16)

Definition at line 27 of file qrasterizer.cpp.

SPAN_BUFFER_SIZE

#define SPAN_BUFFER_SIZE   256

Definition at line 34 of file qrasterizer.cpp.

Function Documentation

intersectPixelFP()

static QScFixed intersectPixelFP ( int  x, QScFixed  top, QScFixed  bottom, QScFixed  leftIntersectX, QScFixed  rightIntersectX, QScFixed  slope, QScFixed  invSlope  )

static

Definition at line 618 of file qrasterizer.cpp.

References IntToQScFixed, QScFixed, QScFixedFactor, QScFixedFastMultiply, and QScFixedMultiply.

Referenced by QRasterizer::rasterizeLine().

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PointToVector()

static QT_FT_Vector PointToVector ( const QPointF &  p )

inlinestatic

Definition at line 39 of file qrasterizer.cpp.

References QT_FT_Pos.

Referenced by QRasterizer::rasterize().

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q26Dot6Compare()

static bool q26Dot6Compare ( qreal  p1, qreal  p2  )

inlinestatic

Definition at line 664 of file qrasterizer.cpp.

References p1, and p2.

Referenced by QRasterizer::rasterizeLine().

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qClipLine()

static bool qClipLine ( QPointF *  pt1, QPointF *  pt2, const QRectF &  clip  )

inlinestatic

Definition at line 712 of file qrasterizer.cpp.

References QRectF::bottom(), QRectF::left(), qIsFinite(), QRectF::right(), QPointF::rx(), QPointF::ry(), and QRectF::top().

Referenced by QRasterizer::rasterizeLine().

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qSafeDivide()

static qreal qSafeDivide ( qreal  x, qreal  y  )

inlinestatic

Definition at line 683 of file qrasterizer.cpp.

Referenced by QRasterizer::rasterizeLine().

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qSafeFloatToQScFixed()

static QScFixed qSafeFloatToQScFixed ( qreal  x )

inlinestatic

Definition at line 694 of file qrasterizer.cpp.

References QScFixed, and QScFixedFactor.

Referenced by QRasterizer::rasterizeLine().

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snapTo26Dot6Grid()

static QPointF snapTo26Dot6Grid ( const QPointF &  p )

inlinestatic

Definition at line 669 of file qrasterizer.cpp.

Referenced by QRasterizer::rasterizeLine().

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split()

static void split ( QT_FT_Vector *  b )

static

Definition at line 247 of file qrasterizer.cpp.

References QT_FT_Pos.

Referenced by QItemSelectionModelPrivate::_q_columnsAboutToBeInserted(), QItemSelectionModelPrivate::_q_rowsAboutToBeInserted(), QmlTypesClassDescription::collect(), QGnomeThemePrivate::configureFonts(), QAndroidPlatformFontDatabase::fallbacksForFamily(), Parser::findEnumValues(), QLocationUtils::getSatInfoFromNmea(), gray_render_conic(), importCompletions(), main(), QScanConverter::mergeCurve(), MetaTypesJsonProcessor::namespaces(), QIBaseDriver::open(), QMYSQLDriver::open(), parseIfMatch(), parseIfNoneMatch(), qParseOpts(), runMoc(), and QQmlJS::Dom::QmlComponent::writeOut().

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Variable Documentation

QScFixed

QT_BEGIN_NAMESPACE typedef int QScFixed

Definition at line 22 of file qrasterizer.cpp.

Referenced by intersectPixelFP(), QScanConverter::mergeLine(), qSafeFloatToQScFixed(), and QRasterizer::rasterizeLine().