Ghostcript used to find the number of pages on output could fail #98
Description
Hello,
I have experienced ghostscript failure to produce expected output for my specific input document.
Error: /rangecheck in --getinterval--
Operand stack:
ClippedLabel () 0 -1
Execution stack:
%interp_exit .runexec2 --nostringval-- --nostringval-- --nostringval-- 2 %stopped_push --nost
ringval-- --nostringval-- --nostringval-- false 1 %stopped_push 1933 1 3 %oparray_pop 1932
1 3 %oparray_pop 1917 1 3 %oparray_pop 1787 1 3 %oparray_pop --nostringval-- %error
exec_pop .runexec2 --nostringval-- --nostringval-- --nostringval-- 2 %stopped_push --nostringval
-- --nostringval-- --nostringval-- --nostringval-- --nostringval-- --nostringval-- --nostringval--
%loop_continue
Dictionary stack:
--dict:745/1123(ro)(G)-- --dict:0/20(G)-- --dict:88/200(L)-- --dict:34/100(L)-- --dict:31/100(L)--
Current allocation mode is local
Current file position is 15757 GPL Ghostscript 10.05.1: Unrecoverable error, exit code 1
It seems it is unable to generate output which cfFilterGhostscript() uses to cound the number of pages in the input document.
cupsfilters/ghostscript.c:
...
1032 // Ghostscript runs too long on files converted from djvu files
1033 // Using -dDEVICEWIDTHPOINTS -dDEVICEHEIGHTPOINTS params solves the
1034 // problem
1035 snprintf(gscommand, 65536, "%s -q -dNOPAUSE -dBATCH -sDEVICE=bbox -dDEVICEWIDTHPOINTS=1 -dDEVICEHEI GHTPOINTS=1 %s 2>&1 | grep -c HiResBoundingBox",
1036 CUPS_GHOSTSCRIPT, filename);
...
I have found well working alternative to this potentially problematic approach. It uses inkcov gs device. See the attached patch and consider merging it.
Thank you,
m.