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[fontations] Implement glyph_v_origin

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This commit is contained in:
Behdad Esfahbod 2025-03-23 16:03:02 -06:00
parent 2ed9c2826a
commit 8e1502cce8
1 changed files with 42 additions and 0 deletions
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42
src/fontations/lib.rs
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@ -11,6 +11,7 @@ use std::sync::atomic::{AtomicPtr, AtomicU32, Ordering};
use std::sync::{Mutex, OnceLock};
use read_fonts::tables::cpal::ColorRecord;
use read_fonts::tables::vorg::Vorg;
use read_fonts::TableProvider;
use skrifa::charmap::Charmap;
use skrifa::charmap::MapVariant::Variant;
@ -64,6 +65,7 @@ struct FontationsData<'a> {
glyph_names: GlyphNames<'a>,
glyph_from_names: OnceLock<HashMap<String, hb_codepoint_t>>,
size: Size,
vert_origin: Option<Vorg<'a>>,
// Mutex for the below
mutex: Mutex<()>,
@ -94,6 +96,9 @@ impl FontationsData<'_> {
let upem = hb_face_get_upem(hb_font_get_face(font));
let vert_origin = font_ref.vorg();
let vert_origin = vert_origin.ok();
let mut data = FontationsData {
face_blob,
font,
@ -104,6 +109,7 @@ impl FontationsData<'_> {
glyph_names,
glyph_from_names: OnceLock::new(),
size: Size::new(upem as f32),
vert_origin,
mutex: Mutex::new(()),
x_mult: 1.0,
y_mult: 1.0,
@ -250,6 +256,36 @@ extern "C" fn _hb_fontations_get_glyph_h_advances(
*struct_at_offset_mut(first_advance, i, advance_stride) = advance as hb_position_t;
}
}
extern "C" fn _hb_fontations_get_glyph_v_origin(
font: *mut hb_font_t,
font_data: *mut ::std::os::raw::c_void,
glyph: hb_codepoint_t,
x: *mut hb_position_t,
y: *mut hb_position_t,
_user_data: *mut ::std::os::raw::c_void,
) -> hb_bool_t {
let data = unsafe { &mut *(font_data as *mut FontationsData) };
data.check_for_updates();
let vert_origin = &data.vert_origin;
if vert_origin.is_none() {
return false as hb_bool_t;
}
unsafe {
*x = hb_font_get_glyph_h_advance(font, glyph) / 2;
}
let glyph_id = GlyphId::new(glyph);
let y_origin = vert_origin.as_ref().unwrap().vertical_origin_y(glyph_id);
unsafe {
*y = (y_origin as f32 * data.y_mult).round() as hb_position_t;
}
true as hb_bool_t
}
extern "C" fn _hb_fontations_get_glyph_extents(
_font: *mut hb_font_t,
font_data: *mut ::std::os::raw::c_void,
@ -880,6 +916,12 @@ fn _hb_fontations_font_funcs_get() -> *mut hb_font_funcs_t {
null_mut(),
None,
);
hb_font_funcs_set_glyph_v_origin_func(
ffuncs,
Some(_hb_fontations_get_glyph_v_origin),
null_mut(),
None,
);
hb_font_funcs_set_glyph_extents_func(
ffuncs,
Some(_hb_fontations_get_glyph_extents),