pangomm: Pango::Font Class Reference

A Pango::Font is used to represent a font in a rendering-system-independent matter. More...

#include <pangomm/font.h>

Inheritance diagram for Pango::Font:

Public Member Functions
	Font (Font && src) noexcept

Font &	operator= (Font && src) noexcept

	~Font () noexcept override

PangoFont *	gobj ()
	Provides access to the underlying C GObject. More...

const PangoFont *	gobj () const
	Provides access to the underlying C GObject. More...

PangoFont *	gobj_copy ()
	Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More...

FontDescription	describe () const
	Returns a description of the font, with font size set in points. More...

FontDescription	describe_with_absolute_size () const
	Returns a description of the font, with absolute font size set in device units. More...

Glib::RefPtr< Coverage >	get_coverage (const Language & language) const
	Computes the coverage map for a given font and language tag. More...

FontMetrics	get_metrics () const
	Gets overall metric information for a font. More...

FontMetrics	get_metrics (const Language & language) const
	Gets overall metric information for a font. More...

void	get_glyph_extents (Glyph glyph, Rectangle & ink_rect, Rectangle & logical_rect) const
	Gets the logical and ink extents of a glyph within a font. More...

Glib::RefPtr< FontMap >	get_font_map ()
	Gets the font map for which the font was created. More...

Glib::RefPtr< const FontMap >	get_font_map () const
	Gets the font map for which the font was created. More...

Glib::RefPtr< FontFace >	get_face ()
	Gets the `Pango::FontFace` to which font belongs. More...

Glib::RefPtr< const FontFace >	get_face () const
	Gets the `Pango::FontFace` to which font belongs. More...

bool	has_char (gunichar wc) const
	Returns whether the font provides a glyph for this character. More...

Rectangle	get_glyph_ink_extents (Glyph glyph) const
	Get the ink extents of a glyph within the font. More...

Rectangle	get_glyph_logical_extents (Glyph glyph) const
	Gets the logical extents of a glyph within the font. More...

Static Public Member Functions
static GType	get_type ()
	Get the GType for this class, for use with the underlying GObject type system. More...

Related Functions
(Note that these are not member functions.)
Glib::RefPtr< Pango::Font >	wrap (PangoFont * object, bool take_copy=false)
	A Glib::wrap() method for this object. More...

Detailed Description

A Pango::Font is used to represent a font in a rendering-system-independent matter.

Constructor & Destructor Documentation

◆ Font()

Pango::Font::Font ( Font && src )

noexcept

◆ ~Font()

Pango::Font::~Font ( )

overridenoexcept

Member Function Documentation

◆ describe()

FontDescription Pango::Font::describe ( ) const

Returns a description of the font, with font size set in points.

Use describe_with_absolute_size() if you want the font size in device units.

Returns: A newly-allocated Pango::FontDescription object.

◆ describe_with_absolute_size()

FontDescription Pango::Font::describe_with_absolute_size ( ) const

Returns a description of the font, with absolute font size set in device units.

Use describe() if you want the font size in points.

Since pangomm 1.14:

Returns: A newly-allocated Pango::FontDescription object.

◆ get_coverage()

Glib::RefPtr< Coverage > Pango::Font::get_coverage ( const Language & language ) const

Computes the coverage map for a given font and language tag.

Parameters

language The language tag.

Returns: A newly-allocated Pango::Coverage object.

◆ get_face() [1/2]

Glib::RefPtr< FontFace > Pango::Font::get_face ( )

Gets the Pango::FontFace to which font belongs.

Since pangomm 1.46:

Returns: The Pango::FontFace.

◆ get_face() [2/2]

Glib::RefPtr< const FontFace > Pango::Font::get_face ( ) const

Gets the Pango::FontFace to which font belongs.

Since pangomm 1.46:

Returns: The Pango::FontFace.

◆ get_font_map() [1/2]

Glib::RefPtr< FontMap > Pango::Font::get_font_map ( )

Gets the font map for which the font was created.

Note that the font maintains a weak reference to the font map, so if all references to font map are dropped, the font map will be finalized even if there are fonts created with the font map that are still alive. In that case this function will return nullptr.

It is the responsibility of the user to ensure that the font map is kept alive. In most uses this is not an issue as a Pango::Context holds a reference to the font map.

Since pangomm 1.10:

Returns: The Pango::FontMap for the font.

◆ get_font_map() [2/2]

Glib::RefPtr< const FontMap > Pango::Font::get_font_map ( ) const

Gets the font map for which the font was created.

It is the responsibility of the user to ensure that the font map is kept alive. In most uses this is not an issue as a Pango::Context holds a reference to the font map.

Since pangomm 1.10:

Returns: The Pango::FontMap for the font.

◆ get_glyph_extents()

void Pango::Font::get_glyph_extents	(	Glyph	glyph,
		Rectangle &	ink_rect,
		Rectangle &	logical_rect
	)		const

Gets the logical and ink extents of a glyph within a font.

The coordinate system for each rectangle has its origin at the base line and horizontal origin of the character with increasing coordinates extending to the right and down. The macros PANGO_ASCENT(), PANGO_DESCENT(), PANGO_LBEARING(), and PANGO_RBEARING can be used to convert from the extents rectangle to more traditional font metrics. The units of the rectangles are in 1/PANGO_SCALE of a device unit.

Parameters

glyph	The glyph index.
ink_rect	Rectangle used to store the extents of the glyph as drawn.
logical_rect	Rectangle used to store the logical extents of the glyph.

◆ get_glyph_ink_extents()

Rectangle Pango::Font::get_glyph_ink_extents ( Glyph glyph ) const

Get the ink extents of a glyph within the font.

Parameters

glyph The glyph index.

Returns: The extents of the glyph as drawn.

◆ get_glyph_logical_extents()

Rectangle Pango::Font::get_glyph_logical_extents ( Glyph glyph ) const

Gets the logical extents of a glyph within the font.

Parameters

glyph The glyph index.

Returns: The logical extents of the glyph.

◆ get_metrics() [1/2]

FontMetrics Pango::Font::get_metrics ( ) const

Gets overall metric information for a font.

The metrics may be substantially different for different scripts. However, this function overload returns the metrics for the entire font.

◆ get_metrics() [2/2]

FontMetrics Pango::Font::get_metrics ( const Language & language ) const

Gets overall metric information for a font.

Since the metrics may be substantially different for different scripts, a language tag can be provided to indicate that the metrics should be retrieved that correspond to the script(s) used by that language.

Parameters

language Language tag used to determine which script to get the metrics for.

Returns: A Pango::Metrics object.

◆ get_type()

static GType Pango::Font::get_type ( )

static

Get the GType for this class, for use with the underlying GObject type system.

◆ gobj() [1/2]

PangoFont * Pango::Font::gobj ( )

inline

Provides access to the underlying C GObject.

◆ gobj() [2/2]

const PangoFont * Pango::Font::gobj ( ) const

inline

Provides access to the underlying C GObject.

◆ gobj_copy()

PangoFont * Pango::Font::gobj_copy ( )

Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.

◆ has_char()

bool Pango::Font::has_char ( gunichar wc ) const

Returns whether the font provides a glyph for this character.

Since pangomm 1.44:

Parameters

wc	A Unicode character.

Returns: true if font can render wc.

◆ operator=()

Font & Pango::Font::operator= ( Font && src )

noexcept

Friends And Related Function Documentation

◆ wrap()

Glib::RefPtr< Pango::Font > wrap	(	PangoFont *	object,
		bool	take_copy = `false`
	)

A Glib::wrap() method for this object.

Parameters

object	The C instance.
take_copy	False if the result should take ownership of the C instance. True if it should take a new copy or ref.

Returns: A C++ instance that wraps this C instance.

Public Member Functions

Static Public Member Functions

Related Functions

Detailed Description

Constructor & Destructor Documentation

◆ Font()

◆ ~Font()

Member Function Documentation

◆ describe()

◆ describe_with_absolute_size()

◆ get_coverage()

◆ get_face() [1/2]

◆ get_face() [2/2]

◆ get_font_map() [1/2]

◆ get_font_map() [2/2]

◆ get_glyph_extents()

◆ get_glyph_ink_extents()

◆ get_glyph_logical_extents()

◆ get_metrics() [1/2]

◆ get_metrics() [2/2]

◆ get_type()

◆ gobj() [1/2]

◆ gobj() [2/2]

◆ gobj_copy()

◆ has_char()

◆ operator=()

Friends And Related Function Documentation

◆ wrap()