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[ft] Handle negative scales with vertical writing

This commit is contained in:
Behdad Esfahbod 2015-01-28 12:40:40 -08:00
parent 982d94eaa2
commit 7888a6b07a
1 changed files with 8 additions and 0 deletions
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8
src/hb-ft.cc
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@ -118,6 +118,9 @@ hb_ft_get_glyph_v_advance (hb_font_t *font HB_UNUSED,
if (unlikely (FT_Get_Advance (ft_face, glyph, load_flags, &v)))
return 0;
if (font->y_scale < 0)
v = -v;
/* Note: FreeType's vertical metrics grows downward while other FreeType coordinates
* have a Y growing upward. Hence the extra negation. */
return (-v + (1<<9)) >> 10;
@ -154,6 +157,11 @@ hb_ft_get_glyph_v_origin (hb_font_t *font HB_UNUSED,
*x = ft_face->glyph->metrics.horiBearingX - ft_face->glyph->metrics.vertBearingX;
*y = ft_face->glyph->metrics.horiBearingY - (-ft_face->glyph->metrics.vertBearingY);
if (font->x_scale < 0)
*x = -*x;
if (font->y_scale < 0)
*y = -*y;
return true;
}