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[fontations] Apply variations to glyph_v_advances

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This commit is contained in:
Behdad Esfahbod 2025-03-24 17:00:57 -06:00
parent 83d3ffc5d1
commit 0affe12785
1 changed files with 12 additions and 2 deletions
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14
src/fontations/lib.rs
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@ -287,12 +287,22 @@ extern "C" fn _hb_fontations_get_glyph_v_advances(
// for this yet and it's tedious to do with read-fonts.
let vert_metrics = &data.vert_metrics.as_ref().unwrap();
let vert_vars = &data.vert_vars;
for i in 0..count {
let glyph = struct_at_offset(first_glyph, i, glyph_stride);
let glyph_id = GlyphId::new(glyph);
let advance = -(vert_metrics.advance(glyph_id).unwrap_or_default() as f32 * data.y_mult)
.round() as i32;
let mut advance = vert_metrics.advance(glyph_id).unwrap_or_default() as f32;
if vert_vars.is_some() && !data.location.coords().is_empty() {
let coords = data.location.coords();
advance += vert_vars
.as_ref()
.unwrap()
.advance_height_delta(glyph_id, coords)
.unwrap_or_default()
.to_f32();
}
let advance = -(advance * data.y_mult).round() as i32;
*struct_at_offset_mut(first_advance, i, advance_stride) = advance as hb_position_t;
}
}