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-rw-r--r--src/ChangeLog8
-rw-r--r--src/w32uniscribe.c6
2 files changed, 13 insertions, 1 deletions
diff --git a/src/ChangeLog b/src/ChangeLog
index a8d6a4026a0..f905cc3b5a2 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -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.
diff --git a/src/w32uniscribe.c b/src/w32uniscribe.c
index bc45e2c648c..cf99d14dc77 100644
--- a/src/w32uniscribe.c
+++ b/src/w32uniscribe.c
@@ -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);