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% Copyright (C) 2001-2012 Artifex Software, Inc.
% All Rights Reserved.
%
% This software is provided AS-IS with no warranty, either express or
% implied.
%
% This software is distributed under license and may not be copied,
% modified or distributed except as expressly authorized under the terms
% of the license contained in the file LICENSE in this distribution.
%
% Refer to licensing information at http://www.artifex.com or contact
% Artifex Software, Inc., 7 Mt. Lassen Drive - Suite A-134, San Rafael,
% CA 94903, U.S.A., +1(415)492-9861, for further information.
% pdfinflt.ps
%
% Try to decompress any FlateDecode streams in the input file.
%
% Usage: gs -- toolbin/pdfinflt.ps infile outfile
%
% Requires: lib/pdfwrite.ps.
%
%
% It is not yet ready for prime time, but it is available for anyone wants
% to fix it.
%
% The main problem is:
%
% 1. Sometimes the PDF files that are written are broken. When they are
% broken, GS gets an xref problem.
%
% This problem is actually due to lib/pdfwrite.ps since even
% when no conversion is done, the file is may be bad.
% Check to make sure both input and output filename was specified.
[ shellarguments
{ counttomark 2 eq {
% Arguments ok
/OutFileName exch def
/InFileName exch def
(pdfwrite.ps) runlibfile
/justcopy /pdfcopystream load def
/filterstoremove <<
% list of filters to apply
% - kept as a dictionary, for faster searches
/ASCIIHexDecode {}
/AHx { pop /ASCIIHexDecode } bind
/ASCII85Decode {}
/A85 { pop /ASCII85Decode } bind
/LZWDecode {}
/LZW { pop /LZWDecode } bind
/FlateDecode {}
/Fl { pop /FlateDecode } bind
% /RunLengthDecode {}
% /RL { pop /RunLengthDecode } bind
% /CCITTFaxDecode {}
% /CCF { pop /CCITTFaxDecode } bind
% /DCTDecode {}
% /DCT { pop /DCTDecode } bind
% /JBIG2Decode dup /Filter resourcestatus {pop pop (GS-specific)} {pop} ifelse
% /JPXDecode dup /Filter resourcestatus {pop pop (GS-specific)} {pop} ifelse
% /Crypt (no equivalent)
>> def
/pdfcopystream { % <newstreamdict> <file> pdfcopystream -
% (file has been positioned)
1 index /Filter known {
10 dict begin
%stack: <newstreamdict> <file>
/infile exch def /sdict exch def
RMap ld_length neg omapnew pop /lenobj exch def
/copyofsdict sdict dup length dict copy def
copyofsdict dup /Length lenobj /O cvx 2 packedarray cvx put
infile sdict /Length oget () /SubFileDecode filter
% apply filters to the (input) stream
{
%stack: <file>
% extract first filter and its parameters
{/DecodeParms/Filter} {
copyofsdict exch knownoget {
dup type /arraytype eq { 0 get } if
} {
null
} ifelse
} forall
%stack: <file> <decode|null> <filter|null>
dup null eq {
pop pop exit
} if
filterstoremove 1 index .knownget {
exec
% apply the filter
exch dup null eq { pop } { exch } ifelse
filter
%stack: <file>
% remove first element from each of /Filter and /DecodeParms
copyofsdict dup {/DecodeParms/Filter} {
%stack: <file> <copyofsdict> <copyofsdict> </Key>
2 copy knownoget {
dup type /arraytype eq {
dup length dup 3 ge {
1 exch 1 sub getinterval put
} {
{
{pop undef} % []
{pop undef} % [elem]
{1 get put} % [elem1 elem2]
} exch get exec
} ifelse
} {
pop undef
} ifelse
dup
} {
pop
} ifelse
} forall pop pop
} {
pop pop exit
} ifelse
} loop
/infile exch def
copyofsdict pdfwritevalue (stream\n) ows
/opos OFile fileposition def
infile dup OFile 16#7fffffff pdfcopybytes closefile
/len OFile fileposition opos sub def
(\nendstream\nendobj\n) ows
lenobj pdfwriteobjheader len pdfwritevalue
end
} {
justcopy
} ifelse
} def
{ InFileName (r) file } stopped
{ (\n*** Cannot open input file: ) print InFileName print ( ***\n\n) print flush
quit
}
if
pdfdict begin pdfopen begin
{ OutFileName (w) file } stopped
{ (\n*** Cannot open output file: ) print OutFileName print ( ***\n\n) print flush
quit
}
if
(Converting ) print InFileName print ( to ) print OutFileName = flush
currentdict /Trailer get
dup /Prev undef % We don't want a 'Prev' link.
pdfwrite
end end
(Done.\n) print flush
cleartomark
true % success
}
{
(\n*** Incorrect number of file name arguments. ***\n\n) print
cleartomark false % incorrect number of arguments
}
ifelse
}
{
(\n*** Missing '--' preceding toolbin/pdfinflt.ps ***\n\n) print
cleartomark false % not in shell arguments mode (missing -- )
}
ifelse
not {
(Usage: gs -- toolbin/pdfinflt.ps infile outfile\n\n) print flush
}
if
quit
|
