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[cff] Allow hlineto' and vlineto' without arguments.

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We simply ignore such instructions.  This is invalid, but it doesn't
harm; and indeed, there exist such subsetted fonts in PDFs.

Reported by Albert Astals Cid <aacid@kde.org>.

* src/cff/cffgload.c (cff_decoder_parse_charstrings)
[cff_op_hlineto]: Ignore instruction if there aren't any arguments
on the stack.
This commit is contained in:
Werner Lemberg 2010-12-09 23:16:18 +01:00
parent 9ec31cea16
commit 396b11b840
2 changed files with 19 additions and 1 deletions
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13
ChangeLog
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@ -1,3 +1,16 @@
2010-12-09 Werner Lemberg <wl@gnu.org>
[cff] Allow `hlineto' and `vlineto' without arguments.
We simply ignore such instructions. This is invalid, but it doesn't
harm; and indeed, there exist such subsetted fonts in PDFs.
Reported by Albert Astals Cid <aacid@kde.org>.
* src/cff/cffgload.c (cff_decoder_parse_charstrings)
[cff_op_hlineto]: Ignore instruction if there aren't any arguments
on the stack.
2010-11-28 Werner Lemberg <wl@gnu.org>
* Version 2.4.4 released.

7
src/cff/cffgload.c
View File

@ -1438,9 +1438,14 @@
FT_TRACE4(( op == cff_op_hlineto ? " hlineto\n"
: " vlineto\n" ));
if ( num_args < 1 )
if ( num_args < 0 )
goto Stack_Underflow;
/* there exist subsetted fonts (found in PDFs) */
/* which call `hlineto' without arguments */
if ( num_args == 0 )
break;
if ( cff_builder_start_point ( builder, x, y ) ||
check_points( builder, num_args ) )
goto Fail;