v1::true_type_font Class Reference

Inheritance diagram for v1::true_type_font:

Public Member Functions
	true_type_font (std::filesystem::path const &path)
	true_type_font (true_type_font const &other)=delete
true_type_font &	operator= (true_type_font const &other)=delete
	true_type_font (true_type_font &&other)=delete
true_type_font &	operator= (true_type_font &&other)=delete
bool	loaded () const noexcept override
	Return if the font is loaded.
graphic_path	get_path (hi::glyph_id glyph_id) const override
	Load a glyph into a path.
float	get_advance (hi::glyph_id glyph_id) const override
	Get the advance for a glyph.
glyph_metrics	get_metrics (hi::glyph_id glyph_id) const override
	Load a glyph into a path.
shape_run_result_type	shape_run (iso_639 language, iso_15924 script, gstring run) const override
	Shape a run of graphemes.
Public Member Functions inherited from v1::font
	font (font const &)=delete
font &	operator= (font const &)=delete
	font (font &&)=delete
font &	operator= (font &&)=delete
glyph_id	find_glyph (char32_t c) const noexcept
	Get the glyph for a code-point.
lean_vector< glyph_id >	find_glyph (grapheme g) const
	Get the glyphs for a grapheme.
glyph_atlas_info &	atlas_info (glyph_id glyph) const
font_variant	font_variant () const noexcept

Additional Inherited Members
Data Fields inherited from v1::font
std::string	family_name
	The family name as parsed from the font file.
std::string	sub_family_name
	The sub-family name as parsed from the font file.
bool	monospace = false
bool	serif = false
font_style	style = font_style::normal
bool	condensed = false
font_weight	weight = font_weight::regular
float	optical_size = 12.0
font_char_map	char_map
	A optimized character map.
std::string	features
	A string representing the features of a font.
font_metrics_em	metrics
	The metrics of a font.
std::vector< hi::font * >	fallback_chain
	List of fonts to use as a fallback for this font.

Member Function Documentation

get_advance()

float v1::true_type_font::get_advance ( hi::glyph_id glyph_id ) const

inlineoverridevirtual

Get the advance for a glyph.

Parameters

glyph_id

The glyph to look up the advance for.

Returns

The advance for the glyph.

Exceptions

std::exception

If there was an error looking up the glyph.

Implements v1::font.

get_metrics()

glyph_metrics v1::true_type_font::get_metrics ( hi::glyph_id glyph_id ) const

inlineoverridevirtual

Load a glyph into a path.

The glyph is directly loaded from the font file.

Parameters

glyph_id	the id of a glyph inside the font.
metrics	The metrics constructed by the loader.
lookahead_glyph_id	The id of a glyph to the right, needed for kerning.

Returns

true on success, false on error.

Implements v1::font.

get_path()

graphic_path v1::true_type_font::get_path ( hi::glyph_id glyph_id ) const

inlineoverridevirtual

Load a glyph into a path.

The glyph is directly loaded from the font file.

Parameters

glyph_id

the id of a glyph inside the font.

Returns

The path loaded from the font file.

Exceptions

std::exception

If there was an error while loading the path. Recommend to disable the font on error.

Implements v1::font.

loaded()

bool v1::true_type_font::loaded ( ) const

inlineoverridevirtualnoexcept

Return if the font is loaded.

Returns

true if the font is fully loaded, false if only metadata of the font is available.

Implements v1::font.

shape_run()

shape_run_result_type v1::true_type_font::shape_run ( iso_639 language, iso_15924 script, gstring run ) const

inlineoverridevirtual

Shape a run of graphemes.

A run of graphemes is a piece of text that is:

• from the same style,
• from the same font,
• from the same language and script, and
• on the same line.

A run needs to be shaped by the font-file itself as it handles:

• language/script depended glyph substitution for ligatures, accents and cursive text.
• language/script depended glyph positioning for kerning, accents and cursive text.

Parameters

language	The language of this run of graphemes.
script	The script of this run of graphemes.
run	The run of graphemes.

Returns

The glyphs and coordinates to display, and coordinates of grapheme for interaction.

Implements v1::font.

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

• hikogui/src/hikogui/font/true_type_font.hpp