QFontDatabase Class Reference

The QFontDatabase class provides information about the fonts available in the underlying window system. More...

#include <qfontdatabase.h>

Public Types
enum	WritingSystem {   Any, Latin, Greek, Cyrillic,   Armenian, Hebrew, Arabic, Syriac,   Thaana, Devanagari, Bengali, Gurmukhi,   Gujarati, Oriya, Tamil, Telugu,   Kannada, Malayalam, Sinhala, Thai,   Lao, Tibetan, Myanmar, Georgian,   Khmer, SimplifiedChinese, TraditionalChinese, Japanese,   Korean, Vietnamese, Symbol, Other = Symbol,   Ogham, Runic, Nko, WritingSystemsCount }

Public Functions
bool	bold (const QString &family, const QString &style) const
	Returns true if the font that has family family and style style is bold; otherwise returns false. More...
QStringList	families (WritingSystem writingSystem=Any) const
	Returns a sorted list of the available font families which support the writingSystem. More...
QFont	font (const QString &family, const QString &style, int pointSize) const
	Returns a QFont object that has family family, style style and point size pointSize. More...
bool	hasFamily (const QString &family) const
bool	isBitmapScalable (const QString &family, const QString &style=QString()) const
	Returns true if the font that has family family and style style is a scalable bitmap font; otherwise returns false. More...
bool	isFixedPitch (const QString &family, const QString &style=QString()) const
	Returns true if the font that has family family and style style is fixed pitch; otherwise returns false. More...
bool	isScalable (const QString &family, const QString &style=QString()) const
	Returns true if the font that has family family and style style is scalable; otherwise returns false. More...
bool	isSmoothlyScalable (const QString &family, const QString &style=QString()) const
	Returns true if the font that has family family and style style is smoothly scalable; otherwise returns false. More...
bool	italic (const QString &family, const QString &style) const
	Returns true if the font that has family family and style style is italic; otherwise returns false. More...
QList< int >	pointSizes (const QString &family, const QString &style=QString())
	Returns a list of the point sizes available for the font with the given family and style. More...
	QFontDatabase ()
	Creates a font database object. More...
QList< int >	smoothSizes (const QString &family, const QString &style)
	Returns the point sizes of a font with the given family and style that will look attractive. More...
QStringList	styles (const QString &family) const
	Returns a list of the styles available for the font family family. More...
QString	styleString (const QFont &font)
	Returns a string that describes the style of the font. More...
QString	styleString (const QFontInfo &fontInfo)
	Returns a string that describes the style of the fontInfo. More...
int	weight (const QString &family, const QString &style) const
	Returns the weight of the font that has family family and style style. More...
QList< WritingSystem >	writingSystems () const
	Returns a sorted list of the available writing systems. More...
QList< WritingSystem >	writingSystems (const QString &family) const
	Returns a sorted list of the writing systems supported by a given font family. More...

Static Public Functions
static int	addApplicationFont (const QString &fileName)
	Loads the font from the file specified by fileName and makes it available to the application. More...
static int	addApplicationFontFromData (const QByteArray &fontData)
	Loads the font from binary data specified by fontData and makes it available to the application. More...
static QStringList	applicationFontFamilies (int id)
	Returns a list of font families for the given application font identified by id. More...
static bool	removeAllApplicationFonts ()
	Removes all application-local fonts previously added using addApplicationFont() and addApplicationFontFromData(). More...
static bool	removeApplicationFont (int id)
	Removes the previously loaded application font identified by id. More...
static QList< int >	standardSizes ()
	Returns a list of standard font sizes. More...
static bool	supportsThreadedFontRendering ()
	Returns true if font rendering is supported outside the GUI thread, false otherwise. More...
static QString	writingSystemName (WritingSystem writingSystem)
	Returns the names the writingSystem (e.g. More...
static QString	writingSystemSample (WritingSystem writingSystem)
	Returns a string with sample characters from writingSystem. More...

Static Private Functions
static void	createDatabase ()
static QFontEngine *	findFont (int script, const QFontPrivate *fp, const QFontDef &request)
static void	load (const QFontPrivate *d, int script)
	Loads a QFontEngine for the specified script that matches the QFontDef request member variable. More...
static QFontEngine *	loadXlfd (int screen, int script, const QFontDef &request, int force_encoding_id=-1)
static void	parseFontName (const QString &name, QString &foundry, QString &family)
static QString	resolveFontFamilyAlias (const QString &family)

Properties
QFontDatabasePrivate *	d

Friends
struct	QFontDef
class	QFontDialog
class	QFontDialogPrivate
class	QFontEngineMultiQPA
class	QFontEngineMultiQWS
class	QFontEngineMultiS60
class	QFontEngineMultiXLFD
class	QFontPrivate

Detailed Description

The QFontDatabase class provides information about the fonts available in the underlying window system.

Note

This class or function is threadsafe.

The most common uses of this class are to query the database for the list of font families() and for the pointSizes() and styles() that are available for each family. An alternative to pointSizes() is smoothSizes() which returns the sizes at which a given family and style will look attractive.

If the font family is available from two or more foundries the foundry name is included in the family name; for example: "Helvetica [Adobe]" and "Helvetica [Cronyx]". When you specify a family, you can either use the old hyphenated "foundry-family" format or the bracketed "family [foundry]" format; for example: "Cronyx-Helvetica" or "Helvetica [Cronyx]". If the family has a foundry it is always returned using the bracketed format, as is the case with the value returned by families().

The font() function returns a QFont given a family, style and point size.

A family and style combination can be checked to see if it is italic() or bold(), and to retrieve its weight(). Similarly we can call isBitmapScalable(), isSmoothlyScalable(), isScalable() and isFixedPitch().

Use the styleString() to obtain a text version of a style.

The QFontDatabase class also supports some static functions, for example, standardSizes(). You can retrieve the description of a writing system using writingSystemName(), and a sample of characters in a writing system with writingSystemSample().

Example:

    QFontDatabase database;
    QTreeWidget fontTree;
    fontTree.setColumnCount(2);
    fontTree.setHeaderLabels(QStringList() << "Font" << "Smooth Sizes");

    foreach (const QString &family, database.families()) {
        QTreeWidgetItem *familyItem = new QTreeWidgetItem(&fontTree);
        familyItem->setText(0, family);

        foreach (const QString &style, database.styles(family)) {
            QTreeWidgetItem *styleItem = new QTreeWidgetItem(familyItem);
            styleItem->setText(0, style);

            QString sizes;
            foreach (int points, database.smoothSizes(family, style))
                sizes += QString::number(points) + " ";

            styleItem->setText(1, sizes.trimmed());
        }

    }

This example gets the list of font families, the list of styles for each family, and the point sizes that are available for each combination of family and style, displaying this information in a tree view.

See also

QFont, QFontInfo, QFontMetrics, QFontComboBox, {Character Map Example}

Definition at line 66 of file qfontdatabase.h.

Enumerations

WritingSystem

enum QFontDatabase::WritingSystem

• Any
• Latin
• Greek
• Cyrillic
• Armenian
• Hebrew
• Arabic
• Syriac
• Thaana
• Devanagari
• Bengali
• Gurmukhi
• Gujarati
• Oriya
• Tamil
• Telugu
• Kannada
• Malayalam
• Sinhala
• Thai
• Lao
• Tibetan
• Myanmar
• Georgian
• Khmer
• SimplifiedChinese
• TraditionalChinese
• Japanese
• Korean
• Vietnamese
• Symbol
• Other (the same as Symbol)
• Ogham
• Runic
• Nko

• WritingSystemsCount

Enumerator
Any
Latin
Greek
Cyrillic
Armenian
Hebrew
Arabic
Syriac
Thaana
Devanagari
Bengali
Gurmukhi
Gujarati
Oriya
Tamil
Telugu
Kannada
Malayalam
Sinhala
Thai
Lao
Tibetan
Myanmar
Georgian
Khmer
SimplifiedChinese
TraditionalChinese
Japanese
Korean
Vietnamese
Symbol
Other
Ogham
Runic
Nko
WritingSystemsCount

Definition at line 73 of file qfontdatabase.h.

                       {
        Any,

        Latin,
        Greek,
        Cyrillic,
        Armenian,
        Hebrew,
        Arabic,
        Syriac,
        Thaana,
        Devanagari,
        Bengali,
        Gurmukhi,
        Gujarati,
        Oriya,
        Tamil,
        Telugu,
        Kannada,
        Malayalam,
        Sinhala,
        Thai,
        Lao,
        Tibetan,
        Myanmar,
        Georgian,
        Khmer,
        SimplifiedChinese,
        TraditionalChinese,
        Japanese,
        Korean,
        Vietnamese,

        Symbol,
        Other = Symbol,

        Ogham,
        Runic,
        Nko,

        WritingSystemsCount
    };

Constructors and Destructors

QFontDatabase()

QFontDatabase::QFontDatabase

(

)

Creates a font database object.

Definition at line 1606 of file qfontdatabase.cpp.

{
    QMutexLocker locker(fontDatabaseMutex());
    createDatabase();
    d = privateDb();
}

Functions

addApplicationFont()

int QFontDatabase::addApplicationFont ( const QString &  fileName )

static

Loads the font from the file specified by fileName and makes it available to the application.

Since

4.2

An ID is returned that can be used to remove the font again with removeApplicationFont() or to retrieve the list of family names contained in the font.

The function returns -1 if the font could not be loaded.

Currently only TrueType fonts, TrueType font collections, and OpenType fonts are supported.

Note

Adding application fonts on Unix/X11 platforms without fontconfig is currently not supported.

On Symbian, the font family names get truncated to a length of 20 characters.

See also

addApplicationFontFromData(), applicationFontFamilies(), removeApplicationFont()

Definition at line 2659 of file qfontdatabase.cpp.

Referenced by QDeclarativeFontLoader::setSource().

{
    QByteArray data;
    QFile f(fileName);
    if (!(f.fileEngine()->fileFlags(QAbstractFileEngine::FlagsMask) & QAbstractFileEngine::LocalDiskFlag)) {
        if (!f.open(QIODevice::ReadOnly))
            return -1;
        data = f.readAll();
    }
    QMutexLocker locker(fontDatabaseMutex());
    return privateDb()->addAppFont(data, fileName);
}

addApplicationFontFromData()

int QFontDatabase::addApplicationFontFromData ( const QByteArray &  fontData )

static

Loads the font from binary data specified by fontData and makes it available to the application.

Since

4.2

An ID is returned that can be used to remove the font again with removeApplicationFont() or to retrieve the list of family names contained in the font.

The function returns -1 if the font could not be loaded.

Currently only TrueType fonts and TrueType font collections are supported.

Note: Adding application fonts on Unix/X11 platforms without fontconfig is currently not supported.

Note

On Symbian, the font family names get truncated to a length of 20 characters.

See also

addApplicationFont(), applicationFontFamilies(), removeApplicationFont()

Definition at line 2694 of file qfontdatabase.cpp.

Referenced by QDeclarativeFontObject::replyFinished().

{
    QMutexLocker locker(fontDatabaseMutex());
    return privateDb()->addAppFont(fontData, QString() /* fileName */);
}

applicationFontFamilies()

QStringList QFontDatabase::applicationFontFamilies ( int  id )

static

Returns a list of font families for the given application font identified by id.

Since

4.2

See also

addApplicationFont(), addApplicationFontFromData()

Definition at line 2711 of file qfontdatabase.cpp.

Referenced by QDeclarativeFontObject::replyFinished(), and QDeclarativeFontLoader::setSource().

{
    QMutexLocker locker(fontDatabaseMutex());
    return privateDb()->applicationFonts.value(id).families;
}

bold()

bool QFontDatabase::bold	(	const QString &	family,
		const QString &	style
	)		const

Returns true if the font that has family family and style style is bold; otherwise returns false.

See also

italic(), weight()

Definition at line 2172 of file qfontdatabase.cpp.

{
    QString familyName, foundryName;
    parseFontName(family, foundryName, familyName);

    QMutexLocker locker(fontDatabaseMutex());

    QT_PREPEND_NAMESPACE(load)(familyName);

    QtFontFoundry allStyles(foundryName);
    QtFontFamily *f = d->family(familyName);
    if (!f) return false;

    for (int j = 0; j < f->count; j++) {
        QtFontFoundry *foundry = f->foundries[j];
        if (foundryName.isEmpty() ||
            foundry->name.compare(foundryName, Qt::CaseInsensitive) == 0) {
            for (int k = 0; k < foundry->count; k++)
                allStyles.style(foundry->styles[k]->key, foundry->styles[k]->styleName, true);
        }
    }

    QtFontStyle::Key styleKey(style);
    QtFontStyle *s = allStyles.style(styleKey, style);
    return s && s->key.weight >= QFont::Bold;
}

createDatabase()

void QFontDatabase::createDatabase ( )

staticprivate

Definition at line 2590 of file qfontdatabase.cpp.

{ initializeDb(); }

families()

QStringList QFontDatabase::families

(

WritingSystem

writingSystem = Any

)

const

Returns a sorted list of the available font families which support the writingSystem.

If a family exists in several foundries, the returned name for that font is in the form "family [foundry]". Examples: "Times [Adobe]", "Times [Cronyx]", "Palatino".

See also

writingSystems()

Definition at line 1731 of file qfontdatabase.cpp.

Referenced by QFontComboBoxPrivate::_q_updateModel(), QDeclarativeEnginePrivate::fontFamilies(), and loadEngine().

{
    QMutexLocker locker(fontDatabaseMutex());

    QT_PREPEND_NAMESPACE(load)();
#ifdef Q_WS_X11
    if (writingSystem != Any)
        checkSymbolFonts();
#endif

    QStringList flist;
    for (int i = 0; i < d->count; i++) {
        QtFontFamily *f = d->families[i];
        if (f->count == 0)
            continue;
        if (writingSystem != Any && (f->writingSystems[writingSystem] != QtFontFamily::Supported))
            continue;
        if (f->count == 1) {
            flist.append(f->name);
        } else {
            for (int j = 0; j < f->count; j++) {
                QString str = f->name;
                QString foundry = f->foundries[j]->name;
                if (!foundry.isEmpty()) {
                    str += QLatin1String(" [");
                    str += foundry;
                    str += QLatin1Char(']');
                }
                flist.append(str);
            }
        }
    }
    return flist;
}

findFont()

QFontEngine * QFontDatabase::findFont ( int  script, const QFontPrivate *  fp, const QFontDef &  request  )

staticprivate

Warning

This function is not part of the public interface.

Definition at line 255 of file qfontdatabase_qpa.cpp.

Referenced by QFontEngineMultiQPA::loadEngine(), QFontEngineMultiQWS::loadEngine(), and registerFont().

{
    QMutexLocker locker(fontDatabaseMutex());

    const int force_encoding_id = -1;

    if (!privateDb()->count)
        initializeDb();

    QFontEngine *engine;
    QFontCache::Key key(request, script);
    engine = QFontCache::instance()->findEngine(key);
    if (engine) {
        qDebug() << "Cache hit level 1";
        return engine;
    }

    QString family_name, foundry_name;

    parseFontName(request.family, foundry_name, family_name);

    if (qt_enable_test_font && request.family == QLatin1String("__Qt__Box__Engine__")) {
        engine =new QTestFontEngine(request.pixelSize);
        engine->fontDef = request;
    }

    QtFontDesc desc;
    match(script, request, family_name, foundry_name, force_encoding_id, &desc);
    if (desc.family != 0 && desc.foundry != 0 && desc.style != 0) {
        engine = loadEngine(script, request, desc.family, desc.foundry, desc.style, desc.size);
    } else {
        FM_DEBUG("  NO MATCH FOUND\n");
    }

    if (engine) {
        initFontDef(desc, request, &engine->fontDef);

        if (fp) {
            QFontDef def = request;
            if (def.family.isEmpty()) {
                def.family = fp->request.family;
                def.family = def.family.left(def.family.indexOf(QLatin1Char(',')));
            }
        }
    }

    if (!engine) {
        if (!request.family.isEmpty()) {
            QStringList fallbacks = fallbackFamilies(request.family,QFont::Style(request.style),QFont::StyleHint(request.styleHint),QUnicodeTables::Script(script));
            for (int i = 0; i < fallbacks.size(); i++) {
                QFontDef def = request;
                def.family = fallbacks.at(i);
                QFontCache::Key key(def,script);
                engine = QFontCache::instance()->findEngine(key);
                if (!engine) {
                    QtFontDesc desc;
                    match(script, def, def.family, QLatin1String(""), 0, &desc);
                    if (desc.family == 0 && desc.foundry == 0 && desc.style == 0) {
                        continue;
                    }
                    engine = loadEngine(script, def, desc.family, desc.foundry, desc.style, desc.size);
                    if (engine) {
                        initFontDef(desc, def, &engine->fontDef);
                        break;
                    }
                }
            }
        }

        if (!engine)
            engine = new QFontEngineBox(request.pixelSize);

        FM_DEBUG("returning box engine");
    }

    if (fp && fp->dpi > 0) {
        engine->fontDef.pointSize = qreal(double((engine->fontDef.pixelSize * 72) / fp->dpi));
    } else {
        engine->fontDef.pointSize = request.pointSize;
    }

    return engine;
}

font()

QFont QFontDatabase::font	(	const QString &	family,
		const QString &	style,
		int	pointSize
	)		const

Returns a QFont object that has family family, style style and point size pointSize.

If no matching font could be created, a QFont object that uses the application's default font is returned.

Definition at line 2008 of file qfontdatabase.cpp.

Referenced by getFamiliesAndSignatures(), qfontForCocoaFont(), registerFont(), and resolveFontFamilyAlias().

{
    QString familyName, foundryName;
    parseFontName(family, foundryName, familyName);

    QMutexLocker locker(fontDatabaseMutex());

    QT_PREPEND_NAMESPACE(load)(familyName);

    QtFontFoundry allStyles(foundryName);
    QtFontFamily *f = d->family(familyName);
    if (!f) return QApplication::font();

    for (int j = 0; j < f->count; j++) {
        QtFontFoundry *foundry = f->foundries[j];
        if (foundryName.isEmpty() || foundry->name.compare(foundryName, Qt::CaseInsensitive) == 0) {
            for (int k = 0; k < foundry->count; k++)
                allStyles.style(foundry->styles[k]->key, foundry->styles[k]->styleName, true);
        }
    }

    QtFontStyle::Key styleKey(style);
    QtFontStyle *s = bestStyle(&allStyles, styleKey, style);

    if (!s) // no styles found?
        return QApplication::font();

    QFont fnt(family, pointSize, s->key.weight);
    fnt.setStyle((QFont::Style)s->key.style);
    if (!s->styleName.isEmpty())
        fnt.setStyleName(s->styleName);
    return fnt;
}

hasFamily()

bool QFontDatabase::hasFamily

(

const QString &

family

)

const

Warning

This function is not part of the public interface.

Definition at line 2238 of file qfontdatabase.cpp.

{
    QString parsedFamily, foundry;
    parseFontName(family, foundry, parsedFamily);
    const QString familyAlias = resolveFontFamilyAlias(parsedFamily);
    return families().contains(familyAlias, Qt::CaseInsensitive);
}

isBitmapScalable()

bool QFontDatabase::isBitmapScalable	(	const QString &	family,
		const QString &	style = QString()
	)		const

Returns true if the font that has family family and style style is a scalable bitmap font; otherwise returns false.

Scaling a bitmap font usually produces an unattractive hardly readable result, because the pixels of the font are scaled. If you need to scale a bitmap font it is better to scale it to one of the fixed sizes returned by smoothSizes().

See also

isScalable(), isSmoothlyScalable()

Definition at line 1842 of file qfontdatabase.cpp.

{
    bool bitmapScalable = false;
    QString familyName, foundryName;
    parseFontName(family, foundryName, familyName);

    QMutexLocker locker(fontDatabaseMutex());

    QT_PREPEND_NAMESPACE(load)(familyName);

    QtFontStyle::Key styleKey(style);

    QtFontFamily *f = d->family(familyName);
    if (!f) return bitmapScalable;

    for (int j = 0; j < f->count; j++) {
        QtFontFoundry *foundry = f->foundries[j];
        if (foundryName.isEmpty() || foundry->name.compare(foundryName, Qt::CaseInsensitive) == 0) {
            for (int k = 0; k < foundry->count; k++)
                if ((style.isEmpty() ||
                     foundry->styles[k]->styleName == style ||
                     foundry->styles[k]->key == styleKey)
                    && foundry->styles[k]->bitmapScalable && !foundry->styles[k]->smoothScalable) {
                    bitmapScalable = true;
                    goto end;
                }
        }
    }
 end:
    return bitmapScalable;
}

isFixedPitch()

bool QFontDatabase::isFixedPitch	(	const QString &	family,
		const QString &	style = QString()
	)		const

Returns true if the font that has family family and style style is fixed pitch; otherwise returns false.

Definition at line 1813 of file qfontdatabase.cpp.

Referenced by QFontComboBoxPrivate::_q_updateModel().

{
    Q_UNUSED(style);

    QString familyName, foundryName;
    parseFontName(family, foundryName, familyName);

    QMutexLocker locker(fontDatabaseMutex());

    QT_PREPEND_NAMESPACE(load)(familyName);

    QtFontFamily *f = d->family(familyName);
#if !defined(QWS) && defined(Q_OS_MAC)
    qt_mac_get_fixed_pitch(f);
#endif
    return (f && f->fixedPitch);
}

isScalable()

bool QFontDatabase::isScalable	(	const QString &	family,
		const QString &	style = QString()
	)		const

Returns true if the font that has family family and style style is scalable; otherwise returns false.

See also

isBitmapScalable(), isSmoothlyScalable()

Definition at line 1921 of file qfontdatabase.cpp.

{
    QMutexLocker locker(fontDatabaseMutex());
    if (isSmoothlyScalable(family, style))
        return true;
    return isBitmapScalable(family, style);
}

isSmoothlyScalable()

bool QFontDatabase::isSmoothlyScalable	(	const QString &	family,
		const QString &	style = QString()
	)		const

Returns true if the font that has family family and style style is smoothly scalable; otherwise returns false.

If this function returns true, it's safe to scale this font to any size, and the result will always look attractive.

See also

isScalable(), isBitmapScalable()

Definition at line 1884 of file qfontdatabase.cpp.

Referenced by QFontComboBoxPrivate::_q_updateModel(), and QFontFamilyDelegate::paint().

{
    bool smoothScalable = false;
    QString familyName, foundryName;
    parseFontName(family, foundryName, familyName);

    QMutexLocker locker(fontDatabaseMutex());

    QT_PREPEND_NAMESPACE(load)(familyName);

    QtFontStyle::Key styleKey(style);

    QtFontFamily *f = d->family(familyName);
    if (!f) return smoothScalable;

    for (int j = 0; j < f->count; j++) {
        QtFontFoundry *foundry = f->foundries[j];
        if (foundryName.isEmpty() || foundry->name.compare(foundryName, Qt::CaseInsensitive) == 0) {
            for (int k = 0; k < foundry->count; k++)
                if ((style.isEmpty() ||
                     foundry->styles[k]->styleName == style ||
                     foundry->styles[k]->key == styleKey) && foundry->styles[k]->smoothScalable) {
                    smoothScalable = true;
                    goto end;
                }
        }
    }
 end:
    return smoothScalable;
}

italic()

bool QFontDatabase::italic	(	const QString &	family,
		const QString &	style
	)		const

Returns true if the font that has family family and style style is italic; otherwise returns false.

See also

weight(), bold()

Definition at line 2139 of file qfontdatabase.cpp.

{
    QString familyName, foundryName;
    parseFontName(family, foundryName, familyName);

    QMutexLocker locker(fontDatabaseMutex());

    QT_PREPEND_NAMESPACE(load)(familyName);

    QtFontFoundry allStyles(foundryName);
    QtFontFamily *f = d->family(familyName);
    if (!f) return false;

    for (int j = 0; j < f->count; j++) {
        QtFontFoundry *foundry = f->foundries[j];
        if (foundryName.isEmpty() || foundry->name.compare(foundryName, Qt::CaseInsensitive) == 0) {
            for (int k = 0; k < foundry->count; k++)
                allStyles.style(foundry->styles[k]->key, foundry->styles[k]->styleName, true);
        }
    }

    QtFontStyle::Key styleKey(style);
    QtFontStyle *s = allStyles.style(styleKey, style);
    return s && s->key.style == QFont::StyleItalic;
}

load()

void QFontDatabase::load ( const QFontPrivate *  d, int  script  )

staticprivate

Loads a QFontEngine for the specified script that matches the QFontDef request member variable.

Warning

This function is not part of the public interface.

Definition at line 366 of file qfontdatabase_mac.cpp.

Referenced by QFontPrivate::engineForScript(), findFont(), loadWin(), loadXlfd(), and registerFont().

{
    // sanity checks
    if(!qApp)
        qWarning("QFont: Must construct a QApplication before a QFont");

    Q_ASSERT(script >= 0 && script < QUnicodeTables::ScriptCount);
    Q_UNUSED(script);

    QFontDef req = d->request;
    req.pixelSize = qt_mac_pixelsize(req, d->dpi);

    // set the point size to 0 to get better caching
    req.pointSize = 0;
    QFontCache::Key key = QFontCache::Key(req, QUnicodeTables::Common, d->screen);

    if(!(d->engineData = QFontCache::instance()->findEngineData(key))) {
        d->engineData = new QFontEngineData;
        QFontCache::instance()->insertEngineData(key, d->engineData);
    } else {
        d->engineData->ref.ref();
    }
    if(d->engineData->engine) // already loaded
        return;

    // set it to the actual pointsize, so QFontInfo will do the right thing
    req.pointSize = qRound(qt_mac_pointsize(d->request, d->dpi));

    QFontEngine *e = QFontCache::instance()->findEngine(key);
    if(!e && qt_enable_test_font && req.family == QLatin1String("__Qt__Box__Engine__")) {
        e = new QTestFontEngine(req.pixelSize);
        e->fontDef = req;
    }

    if(e) {
        e->ref.ref();
        d->engineData->engine = e;
        return; // the font info and fontdef should already be filled
    }

    QFontEngine *engine = NULL;
#if defined(QT_MAC_USE_COCOA)
    // Shortcut to get the font directly without going through the font database
    if (!req.family.isEmpty() && !req.styleName.isEmpty()) {
        QCFString expectedFamily = QCFString(req.family);
        QCFString expectedStyle = QCFString(req.styleName);

        QCFType<CFMutableDictionaryRef> attributes = CFDictionaryCreateMutable(NULL, 0,
            &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
        CFDictionaryAddValue(attributes, kCTFontFamilyNameAttribute, expectedFamily);
        CFDictionaryAddValue(attributes, kCTFontStyleNameAttribute, expectedStyle);

        QCFType<CTFontDescriptorRef> descriptor = CTFontDescriptorCreateWithAttributes(attributes);
        CGAffineTransform transform = qt_transform_from_fontdef(req);
        QCFType<CTFontRef> ctFont = CTFontCreateWithFontDescriptor(descriptor, req.pixelSize, &transform);
        if (ctFont) {
            QCFString familyName = CTFontCopyFamilyName(ctFont);
            // Only accept the font if the family name is exactly the same as we specified
            if (CFEqual(expectedFamily, familyName)) {
                engine = new QCoreTextFontEngineMulti(ctFont, req, d->kerning);
            }
        }
    }
#endif
    if (!engine)
        engine = loadFromDatabase(req, d);

    if (engine) {
        d->engineData->engine = engine;
        engine->ref.ref();
        QFontCache::instance()->insertEngine(key, engine);
    }
}

loadXlfd()

QFontEngine * QFontDatabase::loadXlfd ( int  screen, int  script, const QFontDef &  request, int  force_encoding_id = -1  )

staticprivate

Definition at line 1797 of file qfontdatabase_x11.cpp.

Referenced by QFontEngineMultiXLFD::loadEngine().

{
    QMutexLocker locker(fontDatabaseMutex());

    QtFontDesc desc;
    FM_DEBUG() << "---> loadXlfd: request is" << request.family;
    QStringList families_and_foundries = familyList(request);
    const char *stylehint = styleHint(request);
    if (stylehint)
        families_and_foundries << QString::fromLatin1(stylehint);
    families_and_foundries << QString();
    FM_DEBUG() << "loadXlfd: list is" << families_and_foundries;
    for (int i = 0; i < families_and_foundries.size(); ++i) {
        QString family, foundry;
        QT_PREPEND_NAMESPACE(parseFontName)(families_and_foundries.at(i), foundry, family);
        FM_DEBUG("loadXlfd: >>>>>>>>>>>>>>trying to match '%s' encoding=%d", family.toLatin1().data(), force_encoding_id);
        QT_PREPEND_NAMESPACE(match)(script, request, family, foundry, force_encoding_id, &desc, QList<int>(), true);
        if (desc.family)
            break;
    }

    QFontEngine *fe = 0;
    if (force_encoding_id != -1
        || (request.styleStrategy & QFont::NoFontMerging)
        || (desc.family && desc.family->writingSystems[QFontDatabase::Symbol] & QtFontFamily::Supported)) {
        if (desc.family) {
            int px = desc.size->pixelSize;
            if (desc.style->smoothScalable && px == SMOOTH_SCALABLE)
                px = request.pixelSize;
            else if (desc.style->bitmapScalable && px == 0)
                px = request.pixelSize;

            QByteArray xlfd("-");
            xlfd += desc.foundry->name.isEmpty() ? QByteArray("*") : desc.foundry->name.toLatin1();
            xlfd += '-';
            xlfd += desc.family->name.isEmpty() ? QByteArray("*") : desc.family->name.toLatin1();
            xlfd += '-';
            xlfd += desc.style->weightName ? desc.style->weightName : "*";
            xlfd += '-';
            xlfd += (desc.style->key.style == QFont::StyleItalic
                     ? 'i'
                     : (desc.style->key.style == QFont::StyleOblique ? 'o' : 'r'));
            xlfd += '-';
            xlfd += desc.style->setwidthName ? desc.style->setwidthName : "*";
            // ### handle add-style
            xlfd += "-*-";
            xlfd += QByteArray::number(px);
            xlfd += '-';
            xlfd += QByteArray::number(desc.encoding->xpoint);
            xlfd += '-';
            xlfd += QByteArray::number(desc.encoding->xres);
            xlfd += '-';
            xlfd += QByteArray::number(desc.encoding->yres);
            xlfd += '-';
            xlfd += desc.encoding->pitch;
            xlfd += '-';
            xlfd += QByteArray::number(desc.encoding->avgwidth);
            xlfd += '-';
            xlfd += xlfd_for_id(desc.encoding->encoding);

            FM_DEBUG("    using XLFD: %s\n", xlfd.data());

            const int mib = xlfd_encoding[desc.encoding->encoding].mib;
            XFontStruct *xfs;
            if ((xfs = XLoadQueryFont(QX11Info::display(), xlfd))) {
                fe = new QFontEngineXLFD(xfs, xlfd, mib);
                const int dpi = QX11Info::appDpiY();
                if (!qt_fillFontDef(xfs, &fe->fontDef, dpi, &desc)
                    && !qt_fillFontDef(xlfd, &fe->fontDef, dpi, &desc)) {
                    initFontDef(desc, request, &fe->fontDef);
                }
            }
        }
        if (!fe) {
            fe = new QFontEngineBox(request.pixelSize);
            fe->fontDef = QFontDef();
        }
    } else {
        QList<int> encodings;
        if (desc.encoding) {
            if (desc.encoding->encoding >= 0)
                encodings.append(int(desc.encoding->encoding));
        }

        if (desc.size) {
            // append all other encodings for the matched font
            for (int i = 0; i < desc.size->count; ++i) {
                QtFontEncoding *e = desc.size->encodings + i;
                if (e == desc.encoding || e->encoding < 0)
                    continue;                
                encodings.append(int(e->encoding));
            }
        }
        // fill in the missing encodings
        const XlfdEncoding *enc = xlfd_encoding;
        for (; enc->name; ++enc) {
            if (!encodings.contains(enc->id) && enc->id >= 0) {
                encodings.append(enc->id);
            }
        }

#if defined(FONT_MATCH_DEBUG)
        FM_DEBUG("    using MultiXLFD, encodings:");
        for (int i = 0; i < encodings.size(); ++i) {
            const int id = encodings.at(i);
            FM_DEBUG("      %2d: %s", xlfd_encoding[id].id, xlfd_encoding[id].name);
        }
#endif

        fe = new QFontEngineMultiXLFD(request, encodings, screen);
    }
    return fe;
}

parseFontName()

void QFontDatabase::parseFontName ( const QString &  name, QString &  foundry, QString &  family  )

staticprivate

Definition at line 2585 of file qfontdatabase.cpp.

Referenced by QFontDef::exactMatch(), findFont(), and QFontDialogPrivate::updateFamilies().

{
    QT_PREPEND_NAMESPACE(parseFontName)(name, foundry, family);
}

pointSizes()

QList< int > QFontDatabase::pointSizes	(	const QString &	family,
		const QString &	style = QString()
	)

Returns a list of the point sizes available for the font with the given family and style.

The list may be empty.

See also

smoothSizes(), standardSizes()

Definition at line 1941 of file qfontdatabase.cpp.

{
#if defined(Q_WS_WIN)
    // windows and macosx are always smoothly scalable
    Q_UNUSED(family);
    Q_UNUSED(styleName);
    return standardSizes();
#else
    bool smoothScalable = false;
    QString familyName, foundryName;
    parseFontName(family, foundryName, familyName);

    QMutexLocker locker(fontDatabaseMutex());

    QT_PREPEND_NAMESPACE(load)(familyName);

    QtFontStyle::Key styleKey(styleName);

    QList<int> sizes;

    QtFontFamily *fam = d->family(familyName);
    if (!fam) return sizes;


#ifdef Q_WS_X11
    int dpi = QX11Info::appDpiY();
#else
    const int dpi = qt_defaultDpiY(); // embedded
#endif

    for (int j = 0; j < fam->count; j++) {
        QtFontFoundry *foundry = fam->foundries[j];
        if (foundryName.isEmpty() || foundry->name.compare(foundryName, Qt::CaseInsensitive) == 0) {
            QtFontStyle *style = foundry->style(styleKey, styleName);
            if (!style) continue;

            if (style->smoothScalable) {
                smoothScalable = true;
                goto end;
            }
            for (int l = 0; l < style->count; l++) {
                const QtFontSize *size = style->pixelSizes + l;

                if (size->pixelSize != 0 && size->pixelSize != USHRT_MAX) {
                    const uint pointSize = qRound(size->pixelSize * qreal(72.0) / dpi);
                    if (! sizes.contains(pointSize))
                        sizes.append(pointSize);
                }
            }
        }
    }
 end:
    if (smoothScalable)
        return standardSizes();

    qSort(sizes);
    return sizes;
#endif
}

removeAllApplicationFonts()

bool QFontDatabase::removeAllApplicationFonts ( )

static

Removes all application-local fonts previously added using addApplicationFont() and addApplicationFontFromData().

Since

4.2

Returns true if unloading of the fonts succeeded; otherwise returns false.

See also

removeApplicationFont(), addApplicationFont(), addApplicationFontFromData()

Definition at line 530 of file qfontdatabase_mac.cpp.

Referenced by registerFont().

{
    QMutexLocker locker(fontDatabaseMutex());

    QFontDatabasePrivate *db = privateDb();
    for(int i = 0; i < db->applicationFonts.count(); ++i) {
        if(!removeApplicationFont(i))
            return false;
    }
    return true;
}

removeApplicationFont()

bool QFontDatabase::removeApplicationFont ( int  id )

static

Removes the previously loaded application font identified by id.

Since

4.2

Returns true if unloading of the font succeeded; otherwise returns false.

See also

removeAllApplicationFonts(), addApplicationFont(), addApplicationFontFromData()

Definition at line 511 of file qfontdatabase_mac.cpp.

Referenced by registerFont(), and removeAllApplicationFonts().

{
    QMutexLocker locker(fontDatabaseMutex());

    QFontDatabasePrivate *db = privateDb();
    if(handle < 0 || handle >= db->applicationFonts.count())
        return false;

    OSStatus e = ATSFontDeactivate(db->applicationFonts.at(handle).handle,
                                   /*iRefCon=*/0, kATSOptionFlagsDefault);
    if(e != noErr)
        return false;

    db->applicationFonts[handle] = QFontDatabasePrivate::ApplicationFont();

    db->invalidate();
    return true;
}

resolveFontFamilyAlias()

QString QFontDatabase::resolveFontFamilyAlias ( const QString &  family )

staticprivate

Definition at line 547 of file qfontdatabase_mac.cpp.

Referenced by QFontDef::exactMatch(), qt_fontdatabase_mutex(), and registerFont().

{
    QCFString expectedFamily = QCFString(family);

    QCFType<CFMutableDictionaryRef> attributes = CFDictionaryCreateMutable(NULL, 0,
        &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
    CFDictionaryAddValue(attributes, kCTFontFamilyNameAttribute, expectedFamily);
    QCFType<CTFontDescriptorRef> descriptor = CTFontDescriptorCreateWithAttributes(attributes);

    QCFType<CFMutableSetRef> mandatoryAttributes = CFSetCreateMutable(NULL, 0, &kCFTypeSetCallBacks);
    CFSetAddValue(mandatoryAttributes, kCTFontFamilyNameAttribute);

    QCFType<CTFontRef> font = CTFontCreateWithFontDescriptor(descriptor, 0.0, NULL);
    QCFType<CTFontDescriptorRef> matched = CTFontDescriptorCreateMatchingFontDescriptor(descriptor, mandatoryAttributes);
    if (!matched)
        return family;

    QCFString familyName = (CFStringRef) CTFontDescriptorCopyLocalizedAttribute(matched, kCTFontFamilyNameAttribute, NULL);
    return familyName;
}

smoothSizes()

QList< int > QFontDatabase::smoothSizes	(	const QString &	family,
		const QString &	style
	)

Returns the point sizes of a font with the given family and style that will look attractive.

The list may be empty. For non-scalable fonts and bitmap scalable fonts, this function is equivalent to pointSizes().

See also

pointSizes(), standardSizes()

Definition at line 2056 of file qfontdatabase.cpp.

{
#ifdef Q_WS_WIN
    Q_UNUSED(family);
    Q_UNUSED(styleName);
    return QFontDatabase::standardSizes();
#else
    bool smoothScalable = false;
    QString familyName, foundryName;
    parseFontName(family, foundryName, familyName);

    QMutexLocker locker(fontDatabaseMutex());

    QT_PREPEND_NAMESPACE(load)(familyName);

    QtFontStyle::Key styleKey(styleName);

    QList<int> sizes;

    QtFontFamily *fam = d->family(familyName);
    if (!fam)
        return sizes;

#ifdef Q_WS_X11
    int dpi = QX11Info::appDpiY();
#else
    const int dpi = qt_defaultDpiY(); // embedded
#endif

    for (int j = 0; j < fam->count; j++) {
        QtFontFoundry *foundry = fam->foundries[j];
        if (foundryName.isEmpty() || foundry->name.compare(foundryName, Qt::CaseInsensitive) == 0) {
            QtFontStyle *style = foundry->style(styleKey, styleName);
            if (!style) continue;

            if (style->smoothScalable) {
                smoothScalable = true;
                goto end;
            }
            for (int l = 0; l < style->count; l++) {
                const QtFontSize *size = style->pixelSizes + l;

                if (size->pixelSize != 0 && size->pixelSize != USHRT_MAX) {
                    const uint pointSize = qRound(size->pixelSize * qreal(72.0) / dpi);
                    if (! sizes.contains(pointSize))
                        sizes.append(pointSize);
                }
            }
        }
    }
 end:
    if (smoothScalable)
        return QFontDatabase::standardSizes();

    qSort(sizes);
    return sizes;
#endif
}

standardSizes()

QList< int > QFontDatabase::standardSizes ( )

static

Returns a list of standard font sizes.

See also

smoothSizes(), pointSizes()

Definition at line 2122 of file qfontdatabase.cpp.

Referenced by smoothSizes().

{
    QList<int> ret;
    static const unsigned short standard[] =
        { 6, 7, 8, 9, 10, 11, 12, 14, 16, 18, 20, 22, 24, 26, 28, 36, 48, 72, 0 };
    const unsigned short *sizes = standard;
    while (*sizes) ret << *sizes++;
    return ret;
}

styles()

QStringList QFontDatabase::styles

(

const QString &

family

)

const

Returns a list of the styles available for the font family family.

Some example styles: "Light", "Light Italic", "Bold", "Oblique", "Demi". The list may be empty.

See also

families()

Definition at line 1773 of file qfontdatabase.cpp.

{
    QString familyName, foundryName;
    parseFontName(family, foundryName, familyName);

    QMutexLocker locker(fontDatabaseMutex());

    QT_PREPEND_NAMESPACE(load)(familyName);

    QStringList l;
    QtFontFamily *f = d->family(familyName);
    if (!f)
        return l;

    QtFontFoundry allStyles(foundryName);
    for (int j = 0; j < f->count; j++) {
        QtFontFoundry *foundry = f->foundries[j];
        if (foundryName.isEmpty() || foundry->name.compare(foundryName, Qt::CaseInsensitive) == 0) {
            for (int k = 0; k < foundry->count; k++) {
                QtFontStyle::Key ke(foundry->styles[k]->key);
                ke.stretch = 0;
                allStyles.style(ke, foundry->styles[k]->styleName, true);
            }
        }
    }

    for (int i = 0; i < allStyles.count; i++) {
        l.append(allStyles.styles[i]->styleName.isEmpty() ?
                 styleStringHelper(allStyles.styles[i]->key.weight,
                                   (QFont::Style)allStyles.styles[i]->key.style) :
                 allStyles.styles[i]->styleName);
    }
    return l;
}

styleString() [1/2]

QString QFontDatabase::styleString

(

const QFont &

font

)

Returns a string that describes the style of the font.

For example, "Bold Italic", "Bold", "Italic" or "Normal". An empty string may be returned.

Definition at line 1531 of file qfontdatabase.cpp.

{
    return font.styleName().isEmpty() ? styleStringHelper(font.weight(), font.style())
                                      : font.styleName();
}

styleString() [2/2]

QString QFontDatabase::styleString

(

const QFontInfo &

fontInfo

)

Returns a string that describes the style of the fontInfo.

For example, "Bold Italic", "Bold", "Italic" or "Normal". An empty string may be returned.

Definition at line 1542 of file qfontdatabase.cpp.

{
    return fontInfo.styleName().isEmpty() ? styleStringHelper(fontInfo.weight(), fontInfo.style())
                                          : fontInfo.styleName();
}

supportsThreadedFontRendering()

bool QFontDatabase::supportsThreadedFontRendering ( )

static

Returns true if font rendering is supported outside the GUI thread, false otherwise.

Since

4.4

In other words, a return value of false means that all QPainter::drawText() calls outside the GUI thread will not produce readable output.

See also

{Thread-Support in Qt Modules::Painting In Threads}{Painting In Threads}

Definition at line 542 of file qfontdatabase_mac.cpp.

Referenced by QPainter::drawTextItem(), and registerFont().

{
    return true;
}

weight()

int QFontDatabase::weight	(	const QString &	family,
		const QString &	style
	)		const

Returns the weight of the font that has family family and style style.

If there is no such family and style combination, returns -1.

See also

italic(), bold()

Definition at line 2208 of file qfontdatabase.cpp.

{
    QString familyName, foundryName;
    parseFontName(family, foundryName, familyName);

    QMutexLocker locker(fontDatabaseMutex());

    QT_PREPEND_NAMESPACE(load)(familyName);

    QtFontFoundry allStyles(foundryName);
    QtFontFamily *f = d->family(familyName);
    if (!f) return -1;

    for (int j = 0; j < f->count; j++) {
        QtFontFoundry *foundry = f->foundries[j];
        if (foundryName.isEmpty() ||
            foundry->name.compare(foundryName, Qt::CaseInsensitive) == 0) {
            for (int k = 0; k < foundry->count; k++)
                allStyles.style(foundry->styles[k]->key, foundry->styles[k]->styleName, true);
        }
    }

    QtFontStyle::Key styleKey(style);
    QtFontStyle *s = allStyles.style(styleKey, style);
    return s ? s->key.weight : -1;
}

writingSystemName()

QString QFontDatabase::writingSystemName ( WritingSystem  writingSystem )

static

Returns the names the writingSystem (e.g.

for displaying to the user in a dialog).

Definition at line 2251 of file qfontdatabase.cpp.

Referenced by QFontDialogPrivate::init(), initializeDb(), and initWritingSystems().

{
    const char *name = 0;
    switch (writingSystem) {
    case Any:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Any");
        break;
    case Latin:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Latin");
        break;
    case Greek:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Greek");
        break;
    case Cyrillic:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Cyrillic");
        break;
    case Armenian:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Armenian");
        break;
    case Hebrew:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Hebrew");
        break;
    case Arabic:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Arabic");
        break;
    case Syriac:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Syriac");
        break;
    case Thaana:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Thaana");
        break;
    case Devanagari:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Devanagari");
        break;
    case Bengali:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Bengali");
        break;
    case Gurmukhi:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Gurmukhi");
        break;
    case Gujarati:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Gujarati");
        break;
    case Oriya:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Oriya");
        break;
    case Tamil:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Tamil");
        break;
    case Telugu:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Telugu");
        break;
    case Kannada:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Kannada");
        break;
    case Malayalam:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Malayalam");
        break;
    case Sinhala:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Sinhala");
        break;
    case Thai:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Thai");
        break;
    case Lao:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Lao");
        break;
    case Tibetan:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Tibetan");
        break;
    case Myanmar:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Myanmar");
        break;
    case Georgian:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Georgian");
        break;
    case Khmer:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Khmer");
        break;
    case SimplifiedChinese:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Simplified Chinese");
        break;
    case TraditionalChinese:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Traditional Chinese");
        break;
    case Japanese:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Japanese");
        break;
    case Korean:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Korean");
        break;
    case Vietnamese:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Vietnamese");
        break;
    case Symbol:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Symbol");
        break;
    case Ogham:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Ogham");
        break;
    case Runic:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "Runic");
        break;
    case Nko:
        name = QT_TRANSLATE_NOOP("QFontDatabase", "N'Ko");
        break;
    default:
        Q_ASSERT_X(false, "QFontDatabase::writingSystemName", "invalid 'writingSystem' parameter");
        break;
    }
    return QApplication::translate("QFontDatabase", name);
}

writingSystems() [1/2]

QList< QFontDatabase::WritingSystem > QFontDatabase::writingSystems

(

)

const

Returns a sorted list of the available writing systems.

This is list generated from information about all installed fonts on the system.

See also

families()

Definition at line 1662 of file qfontdatabase.cpp.

Referenced by writingSystemForFont().

{
    QMutexLocker locker(fontDatabaseMutex());

    QT_PREPEND_NAMESPACE(load)();
#ifdef Q_WS_X11
    checkSymbolFonts();
#endif

    QList<WritingSystem> list;
    for (int i = 0; i < d->count; ++i) {
        QtFontFamily *family = d->families[i];
        if (family->count == 0)
            continue;
        for (int x = Latin; x < WritingSystemsCount; ++x) {
            const WritingSystem writingSystem = WritingSystem(x);
            if (!(family->writingSystems[writingSystem] & QtFontFamily::Supported))
                continue;
            if (!list.contains(writingSystem))
                list.append(writingSystem);
        }
    }
    qSort(list);
    return list;
}

writingSystems() [2/2]

QList< QFontDatabase::WritingSystem > QFontDatabase::writingSystems

(

const QString &

family

)

const

Returns a sorted list of the writing systems supported by a given font family.

See also

families()

Definition at line 1695 of file qfontdatabase.cpp.

{
    QString familyName, foundryName;
    parseFontName(family, foundryName, familyName);

    QMutexLocker locker(fontDatabaseMutex());

    QT_PREPEND_NAMESPACE(load)();
#ifdef Q_WS_X11
    checkSymbolFonts(familyName);
#endif

    QList<WritingSystem> list;
    QtFontFamily *f = d->family(familyName);
    if (!f || f->count == 0)
        return list;

    for (int x = Latin; x < WritingSystemsCount; ++x) {
        const WritingSystem writingSystem = WritingSystem(x);
        if (f->writingSystems[writingSystem] & QtFontFamily::Supported)
            list.append(writingSystem);
    }
    return list;
}

writingSystemSample()

QString QFontDatabase::writingSystemSample ( WritingSystem  writingSystem )

static

Returns a string with sample characters from writingSystem.

Definition at line 2368 of file qfontdatabase.cpp.

Referenced by QRawFont::fromFont(), and QFontFamilyDelegate::paint().

{
    QString sample;
    switch (writingSystem) {
    case Any:
    case Symbol:
        // show only ascii characters
        sample += QLatin1String("AaBbzZ");
        break;
    case Latin:
        // This is cheating... we only show latin-1 characters so that we don't
        // end up loading lots of fonts - at least on X11...
        sample = QLatin1String("Aa");
        sample += QChar(0x00C3);
        sample += QChar(0x00E1);
        sample += QLatin1String("Zz");
        break;
    case Greek:
        sample += QChar(0x0393);
        sample += QChar(0x03B1);
        sample += QChar(0x03A9);
        sample += QChar(0x03C9);
        break;
    case Cyrillic:
        sample += QChar(0x0414);
        sample += QChar(0x0434);
        sample += QChar(0x0436);
        sample += QChar(0x044f);
        break;
    case Armenian:
        sample += QChar(0x053f);
        sample += QChar(0x054f);
        sample += QChar(0x056f);
        sample += QChar(0x057f);
        break;
    case Hebrew:
        sample += QChar(0x05D0);
        sample += QChar(0x05D1);
        sample += QChar(0x05D2);
        sample += QChar(0x05D3);
        break;
    case Arabic:
        sample += QChar(0x0628);
        sample += QChar(0x0629);
        sample += QChar(0x062A);
        sample += QChar(0x063A);
        break;
    case Syriac:
        sample += QChar(0x0715);
        sample += QChar(0x0725);
        sample += QChar(0x0716);
        sample += QChar(0x0726);
        break;
    case Thaana:
        sample += QChar(0x0784);
        sample += QChar(0x0794);
        sample += QChar(0x078c);
        sample += QChar(0x078d);
        break;
    case Devanagari:
        sample += QChar(0x0905);
        sample += QChar(0x0915);
        sample += QChar(0x0925);
        sample += QChar(0x0935);
        break;
    case Bengali:
        sample += QChar(0x0986);
        sample += QChar(0x0996);
        sample += QChar(0x09a6);
        sample += QChar(0x09b6);
        break;
    case Gurmukhi:
        sample += QChar(0x0a05);
        sample += QChar(0x0a15);
        sample += QChar(0x0a25);
        sample += QChar(0x0a35);
        break;
    case Gujarati:
        sample += QChar(0x0a85);
        sample += QChar(0x0a95);
        sample += QChar(0x0aa5);
        sample += QChar(0x0ab5);
        break;
    case Oriya:
        sample += QChar(0x0b06);
        sample += QChar(0x0b16);
        sample += QChar(0x0b2b);
        sample += QChar(0x0b36);
        break;
    case Tamil:
        sample += QChar(0x0b89);
        sample += QChar(0x0b99);
        sample += QChar(0x0ba9);
        sample += QChar(0x0bb9);
        break;
    case Telugu:
        sample += QChar(0x0c05);
        sample += QChar(0x0c15);
        sample += QChar(0x0c25);
        sample += QChar(0x0c35);
        break;
    case Kannada:
        sample += QChar(0x0c85);
        sample += QChar(0x0c95);
        sample += QChar(0x0ca5);
        sample += QChar(0x0cb5);
        break;
    case Malayalam:
        sample += QChar(0x0d05);
        sample += QChar(0x0d15);
        sample += QChar(0x0d25);
        sample += QChar(0x0d35);
        break;
    case Sinhala:
        sample += QChar(0x0d90);
        sample += QChar(0x0da0);
        sample += QChar(0x0db0);
        sample += QChar(0x0dc0);
        break;
    case Thai:
        sample += QChar(0x0e02);
        sample += QChar(0x0e12);
        sample += QChar(0x0e22);
        sample += QChar(0x0e32);
        break;
    case Lao:
        sample += QChar(0x0e8d);
        sample += QChar(0x0e9d);
        sample += QChar(0x0ead);
        sample += QChar(0x0ebd);
        break;
    case Tibetan:
        sample += QChar(0x0f00);
        sample += QChar(0x0f01);
        sample += QChar(0x0f02);
        sample += QChar(0x0f03);
        break;
    case Myanmar:
        sample += QChar(0x1000);
        sample += QChar(0x1001);
        sample += QChar(0x1002);
        sample += QChar(0x1003);
        break;
    case Georgian:
        sample += QChar(0x10a0);
        sample += QChar(0x10b0);
        sample += QChar(0x10c0);
        sample += QChar(0x10d0);
        break;
    case Khmer:
        sample += QChar(0x1780);
        sample += QChar(0x1790);
        sample += QChar(0x17b0);
        sample += QChar(0x17c0);
        break;
    case SimplifiedChinese:
        sample += QChar(0x4e2d);
        sample += QChar(0x6587);
        sample += QChar(0x8303);
        sample += QChar(0x4f8b);
        break;
    case TraditionalChinese:
        sample += QChar(0x4e2d);
        sample += QChar(0x6587);
        sample += QChar(0x7bc4);
        sample += QChar(0x4f8b);
        break;
    case Japanese:
        sample += QChar(0x30b5);
        sample += QChar(0x30f3);
        sample += QChar(0x30d7);
        sample += QChar(0x30eb);
        sample += QChar(0x3067);
        sample += QChar(0x3059);
        break;
    case Korean:
        sample += QChar(0xac00);
        sample += QChar(0xac11);
        sample += QChar(0xac1a);
        sample += QChar(0xac2f);
        break;
    case Vietnamese:
    {
        static const char vietnameseUtf8[] = {
            char(0xef), char(0xbb), char(0xbf), char(0xe1), char(0xbb), char(0x97),
            char(0xe1), char(0xbb), char(0x99),
            char(0xe1), char(0xbb), char(0x91),
            char(0xe1), char(0xbb), char(0x93),
        };
        sample += QString::fromUtf8(vietnameseUtf8, sizeof(vietnameseUtf8));
        break;
    }
    case Ogham:
        sample += QChar(0x1681);
        sample += QChar(0x1682);
        sample += QChar(0x1683);
        sample += QChar(0x1684);
        break;
    case Runic:
        sample += QChar(0x16a0);
        sample += QChar(0x16a1);
        sample += QChar(0x16a2);
        sample += QChar(0x16a3);
        break;
    case Nko:
        sample += QChar(0x7ca);
        sample += QChar(0x7cb);
        sample += QChar(0x7cc);
        sample += QChar(0x7cd);
        break;
    default:
        break;
    }
    return sample;
}

Friends and Related Functions

QFontDef

friend struct QFontDef

friend

Definition at line 166 of file qfontdatabase.h.

Referenced by loadWin().

QFontDialog

friend class QFontDialog

friend

Definition at line 168 of file qfontdatabase.h.

QFontDialogPrivate

friend class QFontDialogPrivate

friend

Definition at line 169 of file qfontdatabase.h.

QFontEngineMultiQPA

friend class QFontEngineMultiQPA

friend

Definition at line 173 of file qfontdatabase.h.

QFontEngineMultiQWS

friend class QFontEngineMultiQWS

friend

Definition at line 171 of file qfontdatabase.h.

QFontEngineMultiS60

friend class QFontEngineMultiS60

friend

Definition at line 172 of file qfontdatabase.h.

QFontEngineMultiXLFD

friend class QFontEngineMultiXLFD

friend

Definition at line 170 of file qfontdatabase.h.

QFontPrivate

friend class QFontPrivate

friend

Definition at line 167 of file qfontdatabase.h.

Properties

d

QFontDatabasePrivate* QFontDatabase::d

private

Definition at line 175 of file qfontdatabase.h.

Referenced by findFont().

---

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

• /src/gui/text/qfontdatabase.h
• /src/gui/text/qfontdatabase.cpp
• /src/gui/text/qfontdatabase_mac.cpp
• /src/gui/text/qfontdatabase_qpa.cpp
• /src/gui/text/qfontdatabase_qws.cpp
• /src/gui/text/qfontdatabase_win.cpp
• /src/gui/text/qfontdatabase_x11.cpp