tt::TrueTypeFont Class Reference

Inheritance diagram for tt::TrueTypeFont:

Public Member Functions
	TrueTypeFont (nonstd::span< std::byte const > bytes)
	TrueTypeFont (std::unique_ptr< ResourceView > view)
	TrueTypeFont (TrueTypeFont const &other)=delete
TrueTypeFont &	operator= (TrueTypeFont const &other)=delete
	TrueTypeFont (TrueTypeFont &&other)=delete
TrueTypeFont &	operator= (TrueTypeFont &&other)=delete
GlyphID	find_glyph (char32_t c) const noexcept override
	Get the glyph for a code-point.
std::optional< GlyphID >	loadGlyph (GlyphID glyph_id, Path &path) const noexcept override
bool	loadGlyphMetrics (GlyphID glyph_id, GlyphMetrics &metrics, GlyphID lookahead_glyph_id=GlyphID{}) const noexcept override
Public Member Functions inherited from tt::Font
	Font (Font const &)=delete
Font &	operator= (Font const &)=delete
	Font (Font &&)=delete
Font &	operator= (Font &&)=delete
FontGlyphIDs	find_glyph (Grapheme g) const noexcept
	Get the glyphs for a grapheme.

Additional Inherited Members
Data Fields inherited from tt::Font
FontDescription	description
	The description is filled with information parsed from the font.

Constructor & Destructor Documentation

TrueTypeFont()

tt::TrueTypeFont::TrueTypeFont ( nonstd::span< std::byte const > bytes )

inline

Load a true type font. The methods in this class will parse the true-type font at run time. This also means that the bytes passed into this constructor will need to remain available.

Member Function Documentation

find_glyph()

GlyphID tt::TrueTypeFont::find_glyph ( char32_t c ) const

overridevirtualnoexcept

Get the glyph for a code-point.

Returns

glyph-index, or invalid when not found or error.

Implements tt::Font.

loadGlyph()

std::optional< GlyphID > tt::TrueTypeFont::loadGlyph ( GlyphID glyph_id, Path & path ) const

overridevirtualnoexcept

Load a glyph into a path. The glyph is directly loaded from the font file.

Parameters

glyph_id	the index of a glyph inside the font.
path	The path constructed by the loader.

Returns

empty on failure, or the glyphID of the metrics to use.

Implements tt::Font.

loadGlyphMetrics()

bool tt::TrueTypeFont::loadGlyphMetrics ( GlyphID glyph_id, GlyphMetrics & metrics, GlyphID lookahead_glyph_id = GlyphID{} ) const

overridevirtualnoexcept

Load a glyphMetrics into a path. The glyph is directly loaded from the font file.

Parameters

glyphIndex	the index of a glyph inside the font.
metrics	The metrics constructed by the loader.
lookahead_glyph_id	The next glyph, used for determining kerning.

Returns

1 on success, 0 on not implemented

Implements tt::Font.

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

• hikogui/src/TTauri/Text/TrueTypeFont.hpp