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% Copyright (C) 2001-2023 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., 39 Mesa Street, Suite 108A, San Francisco,
% CA 94129, USA, for further information.
%
% pdf2dsc.ps
% read pdf file and produce DSC "index" file.
%
% Input file is named PDFname
% Output file is named DSCname
%
% Run using:
% gs -dNODISPLAY -sPDFname=pdffilename -sDSCname=tempfilename pdf2dsc.ps
% Then display the PDF file with
% gs tempfilename
%
% Modified by Jason McCarty, bug 688071
% Add PageLabels support.
% Modified by Geoff Keating <geoffk@ozemail.com.au> 21/12/98:
% Add DocumentMedia, PageMedia comments
% Use inherited BoundingBox and Orientation
% Reformat, add new macro 'puts', generally clean up
% Modified by Johannes Plass <plass@dipmza.physik.uni-mainz.de> 1996-11-05:
% Adds BoundingBox and Orientation if available.
% Modified by rjl/lpd 9/19/96
% Updates for compatibility with modified pdf_*.ps code for handling
% page ranges (i.e., partial files) better.
% Modified by Geoff Keating <Geoff.Keating@anu.edu.au> 7/3/96:
% include Title and CreationDate DSC comments (these are displayed by
% Ghostview);
% reduce the size of typical output files by a factor of about 3.
% Modified by L. Peter Deutsch 3/18/96:
% Removes unnecessary and error-prone code duplicated from pdf_main.ps
% Modified by L. Peter Deutsch for GS 3.33
% Originally by Russell Lang 1995-04-26
/PDFfile PDFname (r) file def
/DSCfile DSCname (w) file def
systemdict /.setsafe known { .setsafe } if
/puts { DSCfile exch writestring } bind def
/DSCstring 255 string def
/MediaTypes 10 dict def
PDFfile runpdfbegin
/FirstPage where { pop } { /FirstPage 1 def } ifelse
/LastPage where { pop } { /LastPage pdfpagecount def } ifelse
% scan through for media sizes, keep them in the dictionary
FirstPage 1 LastPage {
pdfgetpage /MediaBox pget pop % MediaBox is a required attribute
aload pop
3 -1 roll sub 3 1 roll exch sub exch
2 array astore
aload 3 1 roll 10 string cvs exch 10 string cvs
(x) 3 -1 roll concatstrings concatstrings cvn
MediaTypes 3 1 roll exch put
} for
% write header and prolog
(%!PS-Adobe-3.0\n) puts
Trailer /Info knownoget
{
dup /Title knownoget
{
(%%Title: ) puts
DSCfile exch write==
}
if
/CreationDate knownoget
{
(%%CreationDate: ) puts
DSCfile exch write==
}
if
}
if
% This is really supposed to be sorted by frequency of usage...
(%%DocumentMedia: )
MediaTypes {
exch pop
1 index puts
(y) puts dup 1 get DSCstring cvs puts
(x) puts dup 0 get DSCstring cvs puts
( ) puts dup 0 get DSCstring cvs puts
( ) puts 1 get DSCstring cvs puts
( 70 white ()\n) puts
pop (%%+ )
} forall
pop
(%%Pages: ) puts
LastPage FirstPage sub 1 add DSCstring cvs puts
(\n%%EndComments\n) puts
(%%BeginProlog\n) puts
(/Page null def\n/Page# 0 def\n/PDFSave null def\n) puts
(/DSCPageCount 0 def\n) puts
(/DoPDFPage {dup /Page# exch store dup dopdfpages } def\n) puts
(%%EndProlog\n) puts
(%%BeginSetup\n) puts
DSCfile PDFname write==only
( \(r\) file { DELAYSAFER { .setsafe } if } stopped pop\n) puts
( runpdfbegin\n) puts
( process_trailer_attrs\n) puts
(%%EndSetup\n) puts
/.hasPageLabels false def % see "Page Labels" in the PDF Reference
Trailer /Root knownoget {
/PageLabels knownoget {
/PageLabels exch def
/.pageCounter 1 def
/.pageCounterType /D def
/.pagePrefix () def
% (TEXT) .ToLower (text) -- convert text to lowercase -- only letters!
/.ToLower {
dup length 1 sub -1 0 {
1 index exch 2 copy get 2#00100000 or put
} for
} def
% int .CvAlpha (int in alphabetic base 26) -- convert a positive
% integer to base 26 in capital letters, with 1=A; i.e. A..Z, AA..AZ, ...
/.CvAlpha { % using cvrs seems futile since this isn't zero-based ...
[ exch % construct an array of ASCII values, in reverse
{ % the remainder stays on the top of stack
dup 0 eq { pop exit } if % quit if the value is zero
dup 26 mod dup 0 eq { 26 add } if % so that the division is correct
dup 64 add 3 1 roll sub 26 idiv % save the ASCII value and iterate
} loop ]
dup length dup string 3 1 roll
dup -1 1 { % put the letters in a string
4 copy sub exch 4 -1 roll 1 sub get put
} for pop pop
} def
% int .CvRoman (int in capital Roman numerals)
% convert a positive integer to capital Roman numerals
% return a decimal string if >= 4000
/.CvRoman {
dup DSCstring cvs % start with the decimal representation
exch 4000 lt { % convert only if Roman numerals can represent this
dup length
[ [ () (I) (II) (III) (IV) (V) (VI) (VII) (VIII) (IX) ]
[ () (X) (XX) (XXX) (XL) (L) (LX) (LXX) (LXXX) (XC) ]
[ () (C) (CC) (CCC) (CD) (D) (DC) (DCC) (DCCC) (CM) ]
[ () (M) (MM) (MMM) ] ] % Roman equivalents
() % append the Roman equivalent of each decimal digit to this string
2 index -1 1 {
2 index 1 index 1 sub get
5 index 5 index 4 -1 roll sub get
48 sub get concatstrings
} for
4 1 roll pop pop pop
} if
} def
/PageToString <<
/D { DSCstring cvs }
/R { .CvRoman }
/r { .CvRoman .ToLower }
/A { .CvAlpha }
/a { .CvAlpha .ToLower }
>> def
/.hasPageLabels true def
} if
} if
% process each page
FirstPage 1 LastPage {
(%%Page: ) puts
.hasPageLabels {
dup 1 sub PageLabels exch numoget dup null ne {
% page labels changed at this page, reset the values
dup /S known { dup /S get } { null } ifelse
/.pageCounterType exch def
dup /P known { dup /P get } { () } ifelse
/.pagePrefix exch def
dup /St known { /St get } { pop 1 } ifelse
/.pageCounter exch def
} { pop } ifelse
% output the page label
(\() .pagePrefix
.pageCounterType //null ne dup {
PageToString .pageCounterType known and
} if { % format the page number
.pageCounter dup 0 gt { % don't try to format nonpositive numbers
PageToString .pageCounterType get exec
} {
DSCstring cvs
} ifelse
} { () } ifelse
(\)) concatstrings concatstrings concatstrings puts
/.pageCounter .pageCounter 1 add def
} {
dup DSCstring cvs puts
} ifelse
( ) puts
dup DSCstring cvs puts
(\n) puts
dup pdfgetpage
dup /MediaBox pget pop
(%%PageMedia: y) puts
aload pop 3 -1 roll sub DSCstring cvs puts
(x) puts exch sub DSCstring cvs puts
(\n) puts
dup /CropBox pget {
(%%PageBoundingBox: ) puts
{DSCfile exch write=only ( ) puts} forall
(\n) puts
} if
/Rotate pget {
(%%PageOrientation: ) puts
90 div cvi 4 mod dup 0 lt {4 add} if
[(Portrait) (Landscape) (UpsideDown) (Seascape)] exch get puts
(\n) puts
} if
DSCfile exch DSCstring cvs writestring
( DoPDFPage\n) puts
} for
runpdfend
% write trailer
(%%Trailer\n) puts
(runpdfend\n) puts
(%%EOF\n) puts
% close output file and exit
DSCfile closefile
quit
% end of pdf2dsc.ps