leyoda/cosmic-text
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

add contextual alternatives

Browse source
This commit is contained in:
Stewart Connor 2025-03-21 18:24:32 +11:00
parent 50373cd6d7
commit f5879b3425
2 changed files with 8 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

3
src/attrs.rs
View file

@ -134,6 +134,8 @@ pub struct FontFeatures {
pub standard_ligatures: bool, pub standard_ligatures: bool,
/// Contextual ligatures (context-dependent ligatures) /// Contextual ligatures (context-dependent ligatures)
pub contextual_ligatures: bool, pub contextual_ligatures: bool,
/// Contextual alternates (glyph substitutions based on context)
pub contextual_alternates: bool,
/// Discretionary ligatures (optional stylistic ligatures) /// Discretionary ligatures (optional stylistic ligatures)
pub discretionary_ligatures: bool, pub discretionary_ligatures: bool,
} }
@ -145,6 +147,7 @@ impl FontFeatures {
kerning: true, kerning: true,
standard_ligatures: true, standard_ligatures: true,
contextual_ligatures: true, contextual_ligatures: true,
contextual_alternates: true,
discretionary_ligatures: true, discretionary_ligatures: true,
} }
} }

5
src/shape.rs
View file

@ -158,6 +158,11 @@ fn shape_fallback(
attrs.font_features.contextual_ligatures as u32, attrs.font_features.contextual_ligatures as u32,
0..usize::MAX, 0..usize::MAX,
)); ));
features.push(rustybuzz::Feature::new(
rustybuzz::ttf_parser::Tag::from_bytes(b"calt"),
attrs.font_features.contextual_alternates as u32,
0..usize::MAX,
));
features.push(rustybuzz::Feature::new( features.push(rustybuzz::Feature::new(
rustybuzz::ttf_parser::Tag::from_bytes(b"dlig"), rustybuzz::ttf_parser::Tag::from_bytes(b"dlig"),
attrs.font_features.discretionary_ligatures as u32, attrs.font_features.discretionary_ligatures as u32,