Qt
Internal/Contributor docs for the Qt SDK. <b>Note:</b> These are NOT official API docs; those are found <a href='https://doc.qt.io/'>here</a>.
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Classes | Macros | Functions | Variables
qrasterizer.cpp File Reference

(aefb5c5a56dd6882179130b98fc44ac0fb366b03)

#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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Go to the source code of this file.

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.

Referenced by QScanConverter::end(), and qt_inflateSvgzDataFrom().

◆ 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; \
}
next
short next
Definition keywords.cpp:445
qMin
constexpr const T & qMin(const T &a, const T &b)
Definition qminmax.h:40
qMax
constexpr const T & qMax(const T &a, const T &b)
Definition qminmax.h:42
x1
GLuint GLfloat GLfloat GLfloat x1
Definition qopengles2ext.h:2707
buffer
GLenum GLuint buffer
Definition qopengles2ext.h:659
y
GLint y
Definition qopengles2ext.h:206
ny
GLfixed ny
Definition qopenglext.h:5169
x2
GLfixed GLfixed x2
Definition qopenglext.h:5231
QScFixedToInt
#define QScFixedToInt(i)
Definition qrasterizer.cpp:27
d
double d
Definition src_corelib_text_qlocale.cpp:9

◆ FloatToQScFixed

#define FloatToQScFixed ( i)    (QScFixed)((i) * 65536.)

Definition at line 25 of file qrasterizer.cpp.

Referenced by QScanConverter::mergeLine().

◆ FTPosToQScFixed

#define FTPosToQScFixed ( i)    ((QScFixed)(i) * (1 << 10))

Definition at line 29 of file qrasterizer.cpp.

Referenced by QScanConverter::mergeLine().

◆ IntToQScFixed

#define IntToQScFixed ( i)    ((QScFixed)(i) * (1 << 16))

Definition at line 26 of file qrasterizer.cpp.

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

◆ QScFixedFactor

#define QScFixedFactor   65536

Definition at line 28 of file qrasterizer.cpp.

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

◆ QScFixedFastMultiply

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

Definition at line 32 of file qrasterizer.cpp.

Referenced by intersectPixelFP().

◆ QScFixedMultiply

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

Definition at line 31 of file qrasterizer.cpp.

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

◆ 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.

Referenced by QScanConverter::end(), and QRasterizer::rasterizeLine().

◆ SPAN_BUFFER_SIZE

#define SPAN_BUFFER_SIZE   256

Definition at line 34 of file qrasterizer.cpp.

Referenced by QSpanBuffer::addSpan().

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 QmlTypesClassDescription::collect(), QItemSelectionModelPrivate::columnsAboutToBeInserted(), QGnomeThemePrivate::configureFonts(), QAndroidPlatformFontDatabase::fallbacksForFamily(), Parser::findEnumValues(), QLocationUtils::getSatInfoFromNmea(), gray_render_conic(), main(), QScanConverter::mergeCurve(), MetaTypesJsonProcessor::namespaces(), QIBaseDriver::open(), QMYSQLDriver::open(), qParseOpts(), QItemSelectionModelPrivate::rowsAboutToBeInserted(), runMoc(), QStringView::split(), 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().