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[psaux] Fix Type 1 glyphs with too many stem hints. 

According to the CFF specification, charstrings can have up to 96 stem
hints. Due to hint replacement routines in Type 1 charstrings, some
glyphs are rejected by the Adobe engine, which implements the above
limit. This fix turns off hinting for such glyphs.

* src/psaux/pshints.c (cf2_hintmap_build): Reset the error from calling
`cf2_hintmask_setAll' on a problematic Type 1 charstring and turn off
hinting.
This commit is contained in:
Ewald Hew 2018-01-07 16:38:54 +08:00
parent 3758aed760
commit 21bd9c2f8c
2 changed files with 21 additions and 0 deletions
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13
ChangeLog
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@ -1,3 +1,16 @@
2018-01-07 Ewald Hew <ewaldhew@gmail.com>
[psaux] Fix Type 1 glyphs with too many stem hints.
According to the CFF specification, charstrings can have up to 96 stem
hints. Due to hint replacement routines in Type 1 charstrings, some
glyphs are rejected by the Adobe engine, which implements the above
limit. This fix turns off hinting for such glyphs.
* src/psaux/pshints.c (cf2_hintmap_build): Reset the error from calling
`cf2_hintmask_setAll' on a problematic Type 1 charstring and turn off
hinting.
2018-01-06 Werner Lemberg <wl@gnu.org>
Add `FT_Done_MM_Var'.

8
src/psaux/pshints.c
View File

@ -842,7 +842,15 @@
cf2_arrstack_size( hStemHintArray ) +
cf2_arrstack_size( vStemHintArray ) );
if ( !cf2_hintmask_isValid( hintMask ) )
{
if ( font->isT1 )
{
/* no error, just continue unhinted */
*hintMask->error = FT_Err_Ok;
hintmap->hinted = FALSE;
}
return; /* too many stem hints */
}
}
/* begin by clearing the map */