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Internal/Contributor docs for the Qt SDK. Note: These are NOT official API docs; those are found at https://doc.qt.io/
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QFontEngineBox Class Reference

#include <qfontengine_p.h>

Inheritance diagram for QFontEngineBox:
Collaboration diagram for QFontEngineBox:

Public Member Functions

 QFontEngineBox (int size)
 ~QFontEngineBox ()
virtual glyph_t glyphIndex (uint ucs4) const override
virtual int stringToCMap (const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, ShaperFlags flags) const override
virtual void recalcAdvances (QGlyphLayout *, ShaperFlags) const override
void draw (QPaintEngine *p, qreal x, qreal y, const QTextItemInt &si)
virtual void addOutlineToPath (qreal x, qreal y, const QGlyphLayout &glyphs, QPainterPath *path, QTextItem::RenderFlags flags) override
virtual glyph_metrics_t boundingBox (const QGlyphLayout &glyphs) override
virtual glyph_metrics_t boundingBox (glyph_t glyph) override
virtual QFontEngine * cloneWithSize (qreal pixelSize) const override
virtual QFixed emSquareSize () const override
virtual QFixed ascent () const override
virtual QFixed capHeight () const override
virtual QFixed descent () const override
virtual QFixed leading () const override
virtual qreal maxCharWidth () const override
virtual qreal minLeftBearing () const override
virtual qreal minRightBearing () const override
virtual QImage alphaMapForGlyph (glyph_t) override
virtual bool canRender (const QChar *string, int len) const override
int size () const
Public Member Functions inherited from QFontEngine
virtual ~QFontEngine ()
Type type () const
virtual Properties properties () const
virtual void getUnscaledGlyph (glyph_t glyph, QPainterPath *path, glyph_metrics_t *metrics)
QByteArray getSfntTable (uint tag) const
virtual bool getSfntTableData (uint tag, uchar *buffer, uint *length) const
 Returns true if the font table idetified by tag exists in the font; returns false otherwise.
virtual FaceId faceId () const
virtual int synthesized () const
bool supportsSubPixelPositions () const
virtual bool supportsHorizontalSubPixelPositions () const
virtual bool supportsVerticalSubPixelPositions () const
virtual QFixedPoint subPixelPositionFor (const QFixedPoint &position) const
QFixed subPixelPositionForX (QFixed x) const
bool preferTypoLineMetrics () const
bool isColorFont () const
virtual void doKerning (QGlyphLayout *, ShaperFlags) const
virtual void addGlyphsToPath (glyph_t *glyphs, QFixedPoint *positions, int nglyphs, QPainterPath *path, QTextItem::RenderFlags flags)
void getGlyphPositions (const QGlyphLayout &glyphs, const QTransform &matrix, QTextItem::RenderFlags flags, QVarLengthArray< glyph_t > &glyphs_out, QVarLengthArray< QFixedPoint > &positions)
void addBitmapFontToPath (qreal x, qreal y, const QGlyphLayout &, QPainterPath *, QTextItem::RenderFlags)
virtual QImage alphaMapForGlyph (glyph_t glyph, const QFixedPoint &subPixelPosition)
virtual QImage alphaMapForGlyph (glyph_t, const QTransform &t)
virtual QImage alphaMapForGlyph (glyph_t, const QFixedPoint &subPixelPosition, const QTransform &t)
virtual QImage alphaRGBMapForGlyph (glyph_t, const QFixedPoint &subPixelPosition, const QTransform &t)
virtual QImage bitmapForGlyph (glyph_t, const QFixedPoint &subPixelPosition, const QTransform &t, const QColor &color=QColor())
QImage renderedPathForGlyph (glyph_t glyph, const QColor &color)
virtual Glyph * glyphData (glyph_t glyph, const QFixedPoint &subPixelPosition, GlyphFormat neededFormat, const QTransform &t)
virtual bool hasInternalCaching () const
virtual glyph_metrics_t alphaMapBoundingBox (glyph_t glyph, const QFixedPoint &, const QTransform &matrix, GlyphFormat)
virtual void removeGlyphFromCache (glyph_t)
virtual glyph_metrics_t boundingBox (glyph_t glyph, const QTransform &matrix)
glyph_metrics_t tightBoundingBox (const QGlyphLayout &glyphs)
virtual QFixed xHeight () const
virtual QFixed averageCharWidth () const
virtual QFixed lineThickness () const
virtual QFixed underlinePosition () const
virtual void getGlyphBearings (glyph_t glyph, qreal *leftBearing=nullptr, qreal *rightBearing=nullptr)
bool canRender (uint ucs4) const
virtual bool supportsTransformation (const QTransform &transform) const
virtual int glyphCount () const
virtual int glyphMargin (GlyphFormat format)
virtual Qt::HANDLE handle () const
virtual QList< QFontVariableAxis > variableAxes () const
virtual QString glyphName (glyph_t index) const
virtual glyph_t findGlyph (QLatin1StringView name) const
void * harfbuzzFont () const
void * harfbuzzFace () const
bool supportsScript (QChar::Script script) const
virtual int getPointInOutline (glyph_t glyph, int flags, quint32 point, QFixed *xpos, QFixed *ypos, quint32 *nPoints)
void clearGlyphCache (const void *key)
void setGlyphCache (const void *key, QFontEngineGlyphCache *data)
QFontEngineGlyphCache * glyphCache (const void *key, GlyphFormat format, const QTransform &transform, const QColor &color=QColor()) const
virtual bool hasUnreliableGlyphOutline () const
virtual bool expectsGammaCorrectedBlending () const
virtual void setDefaultHintStyle (HintStyle)
void loadKerningPairs (QFixed scalingFactor)

Protected Member Functions

 QFontEngineBox (Type type, int size)
Protected Member Functions inherited from QFontEngine
 QFontEngine (Type type)
QFixed firstLeftBearing (const QGlyphLayout &glyphs)
QFixed lastRightBearing (const QGlyphLayout &glyphs)
QFixed calculatedCapHeight () const
virtual void initializeHeightMetrics () const
bool processHheaTable () const
bool processOS2Table () const

Friends

class QFontPrivate

Additional Inherited Members

Public Types inherited from QFontEngine
enum  Type {
  Box , Multi , Win , Mac ,
  Freetype , QPF1 , QPF2 , Proxy ,
  DirectWrite , TestFontEngine = 0x1000
}
enum  GlyphFormat {
  Format_None , Format_Render = Format_None , Format_Mono , Format_A8 ,
  Format_A32 , Format_ARGB
}
enum  ShaperFlag { DesignMetrics = 0x0002 , GlyphIndicesOnly = 0x0004 , FullStringFallback = 0x008 }
enum  SynthesizedFlags { SynthesizedItalic = 0x1 , SynthesizedBold = 0x2 , SynthesizedStretch = 0x4 }
enum  HintStyle { HintNone , HintLight , HintMedium , HintFull }
enum  SubpixelAntialiasingType {
  Subpixel_None , Subpixel_RGB , Subpixel_BGR , Subpixel_VRGB ,
  Subpixel_VBGR
}
Static Public Member Functions inherited from QFontEngine
static bool isIgnorableChar (char32_t ucs4)
static bool scriptRequiresOpenType (QChar::Script script)
static const uchar * getCMap (const uchar *table, uint tableSize, bool *isSymbolFont, int *cmapSize)
static quint32 getTrueTypeGlyphIndex (const uchar *cmap, int cmapSize, uint unicode)
static QByteArray convertToPostscriptFontFamilyName (const QByteArray &fontFamily)
static bool disableEmojiSegmenter ()
Public Attributes inherited from QFontEngine
QAtomicInt ref
QFontDef fontDef
Holder font_
Holder face_
struct QFontEngine::FaceData faceData
uint cache_cost
uint fsType: 16
bool symbol
bool isSmoothlyScalable
QList< KernPair > kerning_pairs
GlyphFormat glyphFormat
int m_subPixelPositionCount
Protected Attributes inherited from QFontEngine
QFixed m_ascent
QFixed m_descent
QFixed m_leading
bool m_heightMetricsQueried

Detailed Description

Definition at line 411 of file qfontengine_p.h.

Constructor & Destructor Documentation

◆ QFontEngineBox() [1/2]

QFontEngineBox::QFontEngineBox ( int size)

Definition at line 1664 of file qfontengine.cpp.

◆ ~QFontEngineBox()

QFontEngineBox::~QFontEngineBox ( )

Definition at line 1678 of file qfontengine.cpp.

◆ QFontEngineBox() [2/2]

QFontEngineBox::QFontEngineBox ( Type type,
int size )
explicitprotected

Definition at line 1671 of file qfontengine.cpp.

Member Function Documentation

◆ addOutlineToPath()

void QFontEngineBox::addOutlineToPath ( qreal x,
qreal y,
const QGlyphLayout & glyphs,
QPainterPath * path,
QTextItem::RenderFlags flags )
overridevirtual

Reimplemented from QFontEngine.

Definition at line 1718 of file qfontengine.cpp.

◆ alphaMapForGlyph()

QImage QFontEngineBox::alphaMapForGlyph ( glyph_t glyph)
overridevirtual

Create a qimage with the alpha values for the glyph. Returns an image indexed_8 with index values ranging from 0=fully transparent to 255=opaque

Reimplemented from QFontEngine.

Definition at line 1811 of file qfontengine.cpp.

◆ ascent()

QFixed QFontEngineBox::ascent ( ) const
overridevirtual

Reimplemented from QFontEngine.

Definition at line 1780 of file qfontengine.cpp.

◆ boundingBox() [1/2]

glyph_metrics_t QFontEngineBox::boundingBox ( const QGlyphLayout & glyphs)
overridevirtual

Reimplemented from QFontEngine.

Definition at line 1733 of file qfontengine.cpp.

◆ boundingBox() [2/2]

glyph_metrics_t QFontEngineBox::boundingBox ( glyph_t glyph)
overridevirtual

Implements QFontEngine.

Definition at line 1769 of file qfontengine.cpp.

◆ canRender()

bool QFontEngineBox::canRender ( const QChar * string,
int len ) const
overridevirtual

Reimplemented from QFontEngine.

Definition at line 1806 of file qfontengine.cpp.

◆ capHeight()

QFixed QFontEngineBox::capHeight ( ) const
overridevirtual

Implements QFontEngine.

Definition at line 1785 of file qfontengine.cpp.

◆ cloneWithSize()

QFontEngine * QFontEngineBox::cloneWithSize ( qreal pixelSize) const
overridevirtual

Reimplemented from QFontEngine.

Definition at line 1774 of file qfontengine.cpp.

◆ descent()

QFixed QFontEngineBox::descent ( ) const
overridevirtual

Reimplemented from QFontEngine.

Definition at line 1790 of file qfontengine.cpp.

◆ draw()

void QFontEngineBox::draw ( QPaintEngine * p,
qreal x,
qreal y,
const QTextItemInt & si )

Definition at line 1742 of file qfontengine.cpp.

◆ emSquareSize()

virtual QFixed QFontEngineBox::emSquareSize ( ) const
inlineoverridevirtual

Reimplemented from QFontEngine.

Definition at line 428 of file qfontengine_p.h.

◆ glyphIndex()

glyph_t QFontEngineBox::glyphIndex ( uint ucs4) const
overridevirtual

Implements QFontEngine.

Definition at line 1682 of file qfontengine.cpp.

◆ leading()

QFixed QFontEngineBox::leading ( ) const
overridevirtual

Reimplemented from QFontEngine.

Definition at line 1795 of file qfontengine.cpp.

◆ maxCharWidth()

qreal QFontEngineBox::maxCharWidth ( ) const
overridevirtual

Implements QFontEngine.

Definition at line 1801 of file qfontengine.cpp.

◆ minLeftBearing()

virtual qreal QFontEngineBox::minLeftBearing ( ) const
inlineoverridevirtual

Reimplemented from QFontEngine.

Definition at line 434 of file qfontengine_p.h.

◆ minRightBearing()

virtual qreal QFontEngineBox::minRightBearing ( ) const
inlineoverridevirtual

Reimplemented from QFontEngine.

Definition at line 435 of file qfontengine_p.h.

◆ recalcAdvances()

void QFontEngineBox::recalcAdvances ( QGlyphLayout * ,
ShaperFlags  ) const
overridevirtual

Reimplemented from QFontEngine.

Definition at line 1712 of file qfontengine.cpp.

◆ size()

int QFontEngineBox::size ( ) const
inline

Definition at line 440 of file qfontengine_p.h.

◆ stringToCMap()

int QFontEngineBox::stringToCMap ( const QChar * str,
int len,
QGlyphLayout * glyphs,
int * nglyphs,
ShaperFlags flags ) const
overridevirtual

Implements QFontEngine.

Definition at line 1688 of file qfontengine.cpp.

◆ QFontPrivate

friend class QFontPrivate
friend

Definition at line 446 of file qfontengine_p.h.

The documentation for this class was generated from the following files: