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[fontations] Cache charmap

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This commit is contained in:
Behdad Esfahbod 2025-03-04 15:15:11 -07:00 • committed by Khaled Hosny
parent f400d8b30c
commit 51c68eb29d
1 changed files with 11 additions and 6 deletions
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17
src/fontations/lib.rs
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@ -16,6 +16,7 @@ struct FontationsData
{
face_blob: *mut hb_blob_t,
font_ref: FontRef<'static>,
char_map : charmap::Charmap<'static>,
}
extern "C" fn _hb_fontations_data_destroy(font_data: *mut c_void)
@ -37,13 +38,15 @@ extern "C" fn _hb_fontations_get_nominal_glyphs(
) -> ::std::os::raw::c_uint
{
let data = unsafe { &*(font_data as *const FontationsData) };
let font_ref = &data.font_ref;
let char_map = charmap::Charmap::new(font_ref);
let char_map = &data.char_map;
for i in 0..count {
let unicode = unsafe { *(first_unicode as *const u8).offset((i * unicode_stride) as isize) as *const hb_codepoint_t };
let glyph = u32::from(char_map.map(unicode as u32).unwrap_or(GlyphId::new(0)));
unsafe { *((first_glyph as *mut u8).offset((i * glyph_stride) as isize) as *mut hb_codepoint_t) = glyph as hb_codepoint_t; }
let glyph = char_map.map(unicode as u32);
if glyph.is_none()
{ return i; }
let glyph_id = u32::from(glyph.unwrap()) as hb_codepoint_t;
unsafe { *((first_glyph as *mut u8).offset((i * glyph_stride) as isize) as *mut hb_codepoint_t) = glyph_id; }
}
count
@ -119,10 +122,12 @@ pub extern "C" fn hb_fontations_font_set_funcs(
let face_data = unsafe { std::slice::from_raw_parts(blob_data as *const u8, blob_length as usize) };
let font_ref = FontRef::from_index(face_data, face_index).unwrap();
// Set up some data for the callbacks to use:
let char_map = charmap::Charmap::new(&font_ref);
let data = Box::new(FontationsData {
face_blob,
font_ref
font_ref,
char_map,
});
let data_ptr = Box::into_raw(data) as *mut c_void;