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Fix display of Arabic diacriticals on Windows, per bug #11860.

Browse source 
src/w32uniscribe.c (uniscribe_shape): Reverse the sign of
 offsets[j].dv, since the y axis of the screen coordinates points
 down, while the y axis of the font definition coordinates points
 up.  This fixes display of Arabic diacritics such as KASRA and
 KASRATAN.
This commit is contained in:
Eli Zaretskii 2012-09-04 20:15:45 +03:00
parent 8ce192e317
commit 30934d334e
2 changed files with 13 additions and 1 deletions
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8
src/ChangeLog
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@ -1,3 +1,11 @@
2012-09-04 Eli Zaretskii <eliz@gnu.org>
* w32uniscribe.c (uniscribe_shape): Reverse the sign of
offsets[j].dv, since the y axis of the screen coordinates points
down, while the y axis of the font definition coordinates points
up. This fixes display of Arabic diacritics such as KASRA and
KASRATAN. (Bug#11860)
2012-09-04 Paul Eggert <eggert@cs.ucla.edu>
Be more systematic about _setjmp vs setjmp.

6
src/w32uniscribe.c
View file

@ -454,7 +454,11 @@ uniscribe_shape (Lisp_Object lgstring)
}
else
ASET (vec, 0, make_number (offsets[j].du + adj_offset));
ASET (vec, 1, make_number (offsets[j].dv));
/* In the font definition coordinate system, the
Y coordinate points up, while in our screen
coordinates Y grows downwards. So we need to
reverse the sign of Y-OFFSET here. */
ASET (vec, 1, make_number (-offsets[j].dv));
/* Based on what ftfont.c does... */
ASET (vec, 2, make_number (advances[j]));
LGLYPH_SET_ADJUSTMENT (lglyph, vec);