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[ft] Handle negative x_scale / y_scale

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This commit is contained in:
Behdad Esfahbod 2015-01-23 12:44:24 -08:00
parent b0b38bb892
commit a319d0777b
1 changed files with 10 additions and 2 deletions
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12
src/hb-ft.cc
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@ -99,6 +99,9 @@ hb_ft_get_glyph_h_advance (hb_font_t *font HB_UNUSED,
if (unlikely (FT_Get_Advance (ft_face, glyph, load_flags, &v)))
return 0;
if (font->x_scale < 0)
v = -v;
return (v + (1<<9)) >> 10;
}
@ -530,14 +533,19 @@ hb_ft_font_set_funcs (hb_font_t *font)
FT_Select_Charmap (ft_face, FT_ENCODING_UNICODE);
assert (font->y_scale >= 0);
FT_Set_Char_Size (ft_face,
font->x_scale, font->y_scale,
abs (font->x_scale), abs (font->y_scale),
0, 0);
#if 0
font->x_ppem * 72 * 64 / font->x_scale,
font->y_ppem * 72 * 64 / font->y_scale);
#endif
if (font->x_scale < 0 || font->y_scale < 0)
{
FT_Matrix matrix = { font->x_scale < 0 ? -1 : +1, 0,
0, font->y_scale < 0 ? -1 : +1};
FT_Set_Transform (ft_face, &matrix, NULL);
}
ft_face->generic.data = blob;
ft_face->generic.finalizer = (FT_Generic_Finalizer) _release_blob;