font-with-features ( font assoc -- font' )
Font shaping options
Prev:font-with-tab-width ( font width/f -- font' )
Next:font-with-locale ( font locale -- font' )


Vocabulary
fonts.shaping

Inputs
fonta font
assocfour-character OpenType tags mapped to unsigned 32-bit parameters


Outputs
font'a new font


Word description
Sets OpenType typography features over the text. Zero disables a feature; one enables it. Some features take a numeric alternative. Feature availability depends on the selected font.
monospace-font H{ { "liga" 0 } { "kern" 1 } } font-with-features


Definition
USING: assocs fonts.shaping.private kernel ;

IN: fonts.shaping

: font-with-features ( font assoc -- font' )
dup
[ [ valid-feature-tag? ] [ valid-feature-value? ] bi* and ]
assoc-all? [ invalid-font-features ] unless
clone "features" swap font-with-option ;