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Fix wrong metrics for bitmap-only fonts with HarfBuzz 5

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* src/ftcrfont.c (ftcrhbfont_begin_hb_font): Always use the standard
position unit value on HarfBuzz 5 and later regardless of whether the
font is bitmap-only or not.  (Bug#57066)
This commit is contained in:
YAMAMOTO Mitsuharu 2022-08-11 18:16:24 +09:00
parent 648acc8848
commit ae348b719e
1 changed files with 5 additions and 1 deletions
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6
src/ftcrfont.c
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@ -568,7 +568,11 @@ ftcrhbfont_begin_hb_font (struct font *font, double *position_unit)
ftcrfont_info->ft_size = ft_face->size;
hb_font_t *hb_font = fthbfont_begin_hb_font (font, position_unit);
if (ftcrfont_info->bitmap_position_unit)
/* HarfBuzz 5 correctly scales bitmap-only fonts without position
unit adjustment.
(https://github.com/harfbuzz/harfbuzz/issues/489) */
if (!hb_version_atleast (5, 0, 0)
&& ftcrfont_info->bitmap_position_unit)
*position_unit = ftcrfont_info->bitmap_position_unit;
return hb_font;