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[ft] Fix bitmap-only vertical metrics

This commit is contained in:
Behdad Esfahbod 2022-07-15 14:48:29 -06:00
parent 87d338eb61
commit 307ee9baff
1 changed files with 14 additions and 3 deletions
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17
src/hb-ft.cc
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@ -667,9 +667,20 @@ hb_ft_get_font_h_extents (hb_font_t *font HB_UNUSED,
float y_mult = font->y_scale < 0 ? -1 : +1;
#endif
metrics->ascender = FT_MulFix(ft_face->ascender, ft_face->size->metrics.y_scale);
metrics->descender = FT_MulFix(ft_face->descender, ft_face->size->metrics.y_scale);
metrics->line_gap = FT_MulFix( ft_face->height, ft_face->size->metrics.y_scale ) - (metrics->ascender - metrics->descender);
if (ft_face->units_per_EM != 0)
{
metrics->ascender = FT_MulFix(ft_face->ascender, ft_face->size->metrics.y_scale);
metrics->descender = FT_MulFix(ft_face->descender, ft_face->size->metrics.y_scale);
metrics->line_gap = FT_MulFix( ft_face->height, ft_face->size->metrics.y_scale ) - (metrics->ascender - metrics->descender);
}
else
{
/* Bitmap-only font, eg. color bitmap font. */
metrics->ascender = ft_face->size->metrics.ascender;
metrics->descender = ft_face->size->metrics.descender;
metrics->line_gap = ft_face->size->metrics.height - (metrics->ascender - metrics->descender);
}
metrics->ascender = (hb_position_t) (y_mult * metrics->ascender);
metrics->descender = (hb_position_t) (y_mult * metrics->descender);
metrics->line_gap = (hb_position_t) (y_mult * metrics->line_gap);