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[fontations] Implement one fallback case in get_v_origin

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This commit is contained in:
Behdad Esfahbod 2025-03-27 20:05:13 -06:00
parent 449752c57c
commit 1f6da390e0
1 changed files with 14 additions and 7 deletions
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21
src/fontations/lib.rs
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@ -329,12 +329,12 @@ extern "C" fn _hb_fontations_get_glyph_v_origin(
let data = unsafe { &mut *(font_data as *mut FontationsData) }; let data = unsafe { &mut *(font_data as *mut FontationsData) };
data.check_for_updates(); data.check_for_updates();
unsafe {
*x = hb_font_get_glyph_h_advance(font, glyph) / 2;
}
let vert_origin = &data.vert_origin; let vert_origin = &data.vert_origin;
if let Some(vert_origin) = vert_origin { if let Some(vert_origin) = vert_origin {
unsafe {
*x = hb_font_get_glyph_h_advance(font, glyph) / 2;
}
let glyph_id = GlyphId::new(glyph); let glyph_id = GlyphId::new(glyph);
let mut y_origin = vert_origin.vertical_origin_y(glyph_id) as f32; let mut y_origin = vert_origin.vertical_origin_y(glyph_id) as f32;
@ -356,10 +356,17 @@ extern "C" fn _hb_fontations_get_glyph_v_origin(
return true as hb_bool_t; return true as hb_bool_t;
} }
// TODO: Implement the two other fallback cases, for TrueType // TODO: Implement the fallback case for TrueType with vmtx.
// with vmtx, and for no vmtx. See hb-ot-font implementation.
false as hb_bool_t let mut font_extents: hb_font_extents_t = unsafe { std::mem::zeroed() };
unsafe {
hb_font_get_extents_for_direction(font, hb_direction_t_HB_DIRECTION_LTR, &mut font_extents);
}
unsafe {
*y = font_extents.ascender;
}
true as hb_bool_t
} }
extern "C" fn _hb_fontations_get_glyph_extents( extern "C" fn _hb_fontations_get_glyph_extents(