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[coretext-font] Implement font_get_h_metrics

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This commit is contained in:
Behdad Esfahbod 2024-10-15 13:49:01 -06:00
parent e31ea830c8
commit 0ce67f56dd
1 changed files with 10 additions and 3 deletions
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13
src/hb-coretext-font.cc
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@ -172,12 +172,19 @@ hb_coretext_get_glyph_extents (hb_font_t *font,
static hb_bool_t
hb_coretext_get_font_h_extents (hb_font_t *font,
void *font_data HB_UNUSED,
void *font_data,
hb_font_extents_t *metrics,
void *user_data HB_UNUSED)
{
// TODO
return false;
CTFontRef ct_font = (CTFontRef) font_data;
CGFloat ct_font_size = CTFontGetSize (ct_font);
CGFloat y_mult = (CGFloat) font->y_scale / ct_font_size;
metrics->ascender = round (CTFontGetAscent (ct_font) * y_mult);
metrics->descender = -round (CTFontGetDescent (ct_font) * y_mult);
metrics->line_gap = round (CTFontGetLeading (ct_font) * y_mult);
return true;
}
#ifndef HB_NO_DRAW