#include <qwasmfontdatabase.h>

Inheritance diagram for QWasmFontDatabase:

Collaboration diagram for QWasmFontDatabase:

Public Member Functions
	QWasmFontDatabase ()

void	populateFontDatabase () override
	This function is called once at startup by Qt's internal font database.

QFontEngine *	fontEngine (const QFontDef &fontDef, void *handle) override
	Returns the font engine that can be used to render the font described by the font definition, fontDef, in the specified script.

QStringList	fallbacksForFamily (const QString &family, QFont::Style style, QFont::StyleHint styleHint, QChar::Script script) const override
	Returns a list of alternative fonts for the specified family and style and script using the styleHint given.

void	releaseHandle (void *handle) override
	Releases the specified font handle.

QFont	defaultFont () const override
	Returns the default system font.

void	populateLocalfonts ()

void	populateLocalFontFamilies (emscripten::val families)

void	populateLocalFontFamilies (const QStringList &famliies, bool allFamilies)

Public Member Functions inherited from QFreeTypeFontDatabase
QFontEngine *	fontEngine (const QByteArray &fontData, qreal pixelSize, QFont::HintingPreference hintingPreference) override
	Returns the font engine that will be used to back a QRawFont, based on the given \fontData, pixelSize, and hintingPreference.

QStringList	addApplicationFont (const QByteArray &fontData, const QString &fileName, QFontDatabasePrivate::ApplicationFont *applicationFont=nullptr) override
	Adds an application font described by the font contained supplied fontData or using the font contained in the file referenced by fileName.

bool	supportsVariableApplicationFonts () const override
	Returns true if this font database supports loading named instances from variable application fonts.

Public Member Functions inherited from QPlatformFontDatabase
virtual	~QPlatformFontDatabase ()

virtual bool	populateFamilyAliases (const QString &missingFamily)

virtual void	populateFamily (const QString &familyName)
	This function is called whenever a lazily populated family, populated through registerFontFamily(), needs full population.

virtual void	invalidate ()
	This function is called whenever the font database is invalidated.

virtual QFontEngineMulti *	fontEngineMulti (QFontEngine *fontEngine, QChar::Script script)
	Returns a multi font engine in the specified script to encapsulate fontEngine with the option to fall back to the fonts given by fallbacks if fontEngine does not support a certain character.

virtual QString	fontDir () const
	Returns the directory containing the fonts used by the database.

virtual bool	isPrivateFontFamily (const QString &family) const
	Returns true if the font family is private.

virtual QString	resolveFontFamilyAlias (const QString &family) const
	Resolve alias to actual font family names.

virtual bool	fontsAlwaysScalable () const
	Return true if all fonts are considered scalable when using this font database.

virtual QList< int >	standardSizes () const
	Return list of standard font sizes when using this font database.

Static Public Member Functions
static QWasmFontDatabase *	get ()

static void	beginFontDatabaseStartupTask ()

static void	endFontDatabaseStartupTask ()

static void	refFontFileLoading ()

static void	derefFontFileLoading ()

static void	endAllFontFileLoading ()

Static Public Member Functions inherited from QFreeTypeFontDatabase
static void	addNamedInstancesForFace (void *face, int faceIndex, const QString &family, const QString &styleName, QFont::Weight weight, QFont::Stretch stretch, QFont::Style style, bool fixedPitch, const QSupportedWritingSystems &writingSystems, const QByteArray &fileName, const QByteArray &fontData)

static QStringList	addTTFile (const QByteArray &fontData, const QByteArray &file, QFontDatabasePrivate::ApplicationFont *applicationFont=nullptr)

Static Public Member Functions inherited from QPlatformFontDatabase
static QSupportedWritingSystems	writingSystemsFromTrueTypeBits (quint32 unicodeRange[4], quint32 codePageRange[2])
	Helper function that determines the writing systems support by a given unicodeRange and codePageRange.

static QSupportedWritingSystems	writingSystemsFromOS2Table (const char *os2Table, size_t length)
	Helper function that determines the writing system support based on the contents of the OS/2 table in the font.

static void	registerFont (const QString &familyname, const QString &stylename, const QString &foundryname, QFont::Weight weight, QFont::Style style, QFont::Stretch stretch, bool antialiased, bool scalable, int pixelSize, bool fixedPitch, const QSupportedWritingSystems &writingSystems, void *handle)
	Registers a font with the given set of attributes describing the font's foundry, family name, style and stretch information, pixel size, and supported writing systems.

static void	registerFontFamily (const QString &familyName)
	Registers a font family with the font database.

static void	registerAliasToFontFamily (const QString &familyName, const QString &alias)
	Helper function that register the alias for the familyName.

static void	repopulateFontDatabase ()
	Requests that the platform font database should be repopulated.

static bool	isFamilyPopulated (const QString &familyName)
	Helper function that returns true if the font family has already been registered and populated.

Detailed Description

Definition at line 13 of file qwasmfontdatabase.h.

Constructor & Destructor Documentation

◆ QWasmFontDatabase()

QWasmFontDatabase::QWasmFontDatabase ( )

Definition at line 172 of file qwasmfontdatabase.cpp.

References beginFontDatabaseStartupTask().

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Member Function Documentation

◆ beginFontDatabaseStartupTask()

void QWasmFontDatabase::beginFontDatabaseStartupTask ( )

static

Definition at line 355 of file qwasmfontdatabase.cpp.

References QEventDispatcherWasm::registerStartupTask().

Referenced by QWasmFontDatabase().

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◆ defaultFont()

QFont QWasmFontDatabase::defaultFont ( ) const

overridevirtual

Returns the default system font.

See also: QGuiApplication::font()

Since: 5.0

Reimplemented from QPlatformFontDatabase.

Definition at line 343 of file qwasmfontdatabase.cpp.

◆ derefFontFileLoading()

void QWasmFontDatabase::derefFontFileLoading ( )

static

Definition at line 378 of file qwasmfontdatabase.cpp.

References emit, endFontDatabaseStartupTask(), QFontCache::instance(), and qGuiApp.

Referenced by populateLocalFontFamilies().

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◆ endAllFontFileLoading()

void QWasmFontDatabase::endAllFontFileLoading ( )

static

Definition at line 389 of file qwasmfontdatabase.cpp.

References emit, endFontDatabaseStartupTask(), QFontCache::instance(), and qGuiApp.

Referenced by populateFontDatabase(), and populateLocalfonts().

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◆ endFontDatabaseStartupTask()

void QWasmFontDatabase::endFontDatabaseStartupTask ( )

static

Definition at line 362 of file qwasmfontdatabase.cpp.

References QEventDispatcherWasm::completeStarupTask().

Referenced by derefFontFileLoading(), and endAllFontFileLoading().

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◆ fallbacksForFamily()

QStringList QWasmFontDatabase::fallbacksForFamily	(	const QString &	family,
		QFont::Style	style,
		QFont::StyleHint	styleHint,
		QChar::Script	script ) const

overridevirtual

Returns a list of alternative fonts for the specified family and style and script using the styleHint given.

Default implementation returns a list of fonts for which style and script support has been reported during the font database population.

Reimplemented from QPlatformFontDatabase.

Definition at line 320 of file qwasmfontdatabase.cpp.

References QPlatformFontDatabase::fallbacksForFamily().

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◆ fontEngine()

QFontEngine * QWasmFontDatabase::fontEngine	(	const QFontDef &	fontDef,
		void *	handle )

overridevirtual

Returns the font engine that can be used to render the font described by the font definition, fontDef, in the specified script.

This function is called by QFontDatabase both for system fonts provided by the platform font database, as well as for application fonts added by the application developer.

The handle is the QPlatformFontDatabase specific handle passed when registering the font family via QPlatformFontDatabase::registerFont.

The function is called for both fonts added via a filename as well as fonts added from QByteArray data. Subclasses will need to handle both cases via its platform specific handle.

Reimplemented from QFreeTypeFontDatabase.

Definition at line 314 of file qwasmfontdatabase.cpp.

References QFreeTypeFontDatabase::fontEngine(), and fontEngine().

Referenced by fontEngine().

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◆ get()

QWasmFontDatabase * QWasmFontDatabase::get ( )

static

Definition at line 180 of file qwasmfontdatabase.cpp.

References QWasmIntegration::get().

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◆ populateFontDatabase()

void QWasmFontDatabase::populateFontDatabase ( )

overridevirtual

This function is called once at startup by Qt's internal font database.

Reimplement this function in a subclass for a convenient place to initialize the internal font database.

You may lazily populate the database by calling registerFontFamily() instead of registerFont(), in which case you'll get a callback to populateFamily() when the required family needs population. You then call registerFont() to finish population of the family.

The default implementation does nothing.

Reimplemented from QFreeTypeFontDatabase.

Definition at line 265 of file qwasmfontdatabase.cpp.

References QFreeTypeFontDatabase::addTTFile(), endAllFontFileLoading(), populateLocalfonts(), QStringLiteral, qWarning, and QIODeviceBase::ReadOnly.

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