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[fontations] Implement get_variation_glyph

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This commit is contained in:
Behdad Esfahbod 2025-03-04 17:03:15 -07:00 • committed by Khaled Hosny
parent 83e85d2ac1
commit 166e630768
1 changed files with 28 additions and 0 deletions
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28
src/fontations/lib.rs
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@ -6,6 +6,7 @@ use std::os::raw::c_void;
use std::ptr::null_mut;
use std::sync::atomic::{AtomicPtr, Ordering};
use skrifa::charmap::MapVariant::Variant;
use skrifa::font::FontRef;
use skrifa::instance::{Location, NormalizedCoord, Size};
use skrifa::{charmap, GlyphId, MetadataProvider};
@ -59,6 +60,27 @@ extern "C" fn _hb_fontations_get_nominal_glyphs(
count
}
extern "C" fn _hb_fontations_get_variation_glyph(
_font: *mut hb_font_t,
font_data: *mut ::std::os::raw::c_void,
unicode: hb_codepoint_t,
variation_selector: hb_codepoint_t,
glyph: *mut hb_codepoint_t,
_user_data: *mut ::std::os::raw::c_void,
) -> hb_bool_t {
let data = unsafe { &*(font_data as *const FontationsData) };
let char_map = &data.char_map;
let variant = char_map.map_variant(unicode as u32, variation_selector as u32);
match variant {
Some(Variant(glyph_id)) => {
unsafe { *glyph = u32::from(glyph_id) as hb_codepoint_t };
true as hb_bool_t
}
_ => false as hb_bool_t,
}
}
extern "C" fn _hb_fontations_get_glyph_h_advances(
_font: *mut hb_font_t,
font_data: *mut ::std::os::raw::c_void,
@ -110,6 +132,12 @@ fn _hb_fontations_font_funcs_create() -> *mut hb_font_funcs_t {
null_mut(),
None,
);
hb_font_funcs_set_variation_glyph_func(
ffuncs,
Some(_hb_fontations_get_variation_glyph),
null_mut(),
None,
);
hb_font_funcs_set_glyph_h_advances_func(
ffuncs,
Some(_hb_fontations_get_glyph_h_advances),