% Copyright (C) 2001-2021 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., 1305 Grant Avenue - Suite 200, Novato, % CA 94945, U.S.A., +1(415)492-9861, for further information. % Convert a PostScript file to an EPSI file, adding the Preview Image. % If the file is already EPSF, then skip the creation of an EPSF, and % only add the preview. A warning is issued if the %%Pages: comment % indicates that there is more than a single page in the input file. % Expected invocation: % gs -q -dNOOUTERSAVE -dNODISPLAY -dLastPage=1 -sOutputFile=out.epsi --permit-file-read=in.ps -- ps2epsi.ps in.ps % Usually this will be invoked by the ps2epsi script (or .bat or .cmd versions) false % no errors from initial param check % NOOUTERSAVE is needed for the SAVE to not remove the tempfile (if one was needed) vmstatus pop pop 0 gt { (Error: missing -dNOOUTERSAVE option) = pop true } if % NODISPLAY may not be strictly needed, but we don't want to open the default device /NODISPLAY where { pop } { (Error: missing -dNODISPLAY option) = pop true } ifelse % LastPage is needed if we are using eps2write on a PostScript (or PDF) file that has multiple pages. /LastPage where { pop } { (Error: missing -dLastPage option) = pop true } ifelse % OutputFile is needed so that it gets on the permit-file-writing list /OutputFile where { pop } { (Error: missing -sOutputFile option) = pop true } ifelse .shellarguments not count 3 lt or count -1 roll or { (usage: gs -q -dNOOUTERSAVE -dNODISPLAY -dLastPage=1 -sOutputFile=out.epsi --permit-file-read=in.eps -- ps2epsi.ps in.ps) = quit } { dup /InputFile exch def (r) file /I exch def } ifelse /O OutputFile (w) file def /S 65535 string def /R { I S readline not { (Error: Unexpected end of file.) = quit } if } bind def /WL { O exch writestring O (\n) writestring } bind def % Write with linefeed /TName null def /EPSFheader (%!PS-Adobe-3.0 EPSF-3.0) def % Read the header to check if this file was EPSF R dup EPSFheader ne { % InputFile was not EPSF pop % discard the first line of the InputFile % run the file through eps2write (into a tempfile) to make an EPSF (_ps2epsi) (w+) .tempfile closefile /TName exch def /SAVE save def (eps2write) finddevice mark /OutputFile TName 3 index putdeviceprops pop setdevice InputFile run SAVE restore /I TName (r) file def R } if WL % Write the first line (either from InputFile or the tempfile % From the "5002 Encapsulated PostScript File Format Specification Version 3.0 1 May 1992" % The preview section must appear after the header comment section, but % before the document prologue definitions. That is, it should immediately % follow the %%EndComments: line in the EPS file. { % loop until we see the %%EndComments line, writing those lines to output R dup (%%EndComments) anchorsearch exch pop { % discard the match or extra copy of the string pop exit % found it } if % Check the %%Pages: comment to issue a warning if there is more than one page. dup (%%Pages:) anchorsearch exch pop { % discard the match or extra copy of the string cvi 1 gt { (Warning: EPSI files can only have 1 page, Only the first page will be in the preview.) = } if } if % Collect the BoundingBox data that will be used when generating the preview dup (%%BoundingBox:) anchorsearch exch pop { % discard the match or extra copy of the string mark exch token not { (Error: invalid BoundingBox parameters) = quit } if exch token not { (Error: invalid BoundingBox parameters) = quit } if exch token not { (Error: invalid BoundingBox parameters) = quit } if exch token not { (Error: invalid BoundingBox parameters) = quit } if exch pop ] /BBox exch def % Preview dimensions /PWidth BBox dup 2 get exch 0 get sub def /PHeight BBox dup 3 get exch 1 get sub def } if WL % send to output file with linefeed. } loop WL % send to output file with linefeed. % If the InputFile already has a preview, skip past it R dup (%%BeginPreview) anchorsearch exch pop { % discard the match or extra copy of the string pop % Read lines until after the %%EndPreview { R (%%EndPreview) anchorsearch exch pop { % discard the match or extra copy of the string pop pop exit % found it } if } loop % Get the next line for use after the generated preview R } if /LineAfterEndComments exch def //null (w+) .tempfile closefile % will be opened by bit device /Pname exch def (bit) selectdevice << /GrayValues 256 % Gray, not monochrome /OutputFile Pname /TextAlphaBits 4 /GraphicsAlphaBits 4 /LastPage 1 % TBD: does this work? /.IgnoreNumCopies true /Install { BBox 0 get neg BBox 1 get neg translate { 1.0 exch sub } settransfer } % EPSI 00 is white /HWResolution [ 72. 72. ] /PageSize [ PWidth PHeight ] >> setpagedevice InputFile run /P Pname (r) file def % Preview data file /SP PWidth string def % One string per image line % Write the preview O (%%BeginPreview: ) writestring O PWidth write==only O ( ) writestring O PHeight write==only O ( 8 ) writestring O PHeight PWidth 39 add 40 idiv mul write== % 40 bytes per line O flushfile 0 1 PHeight 1 sub { pop P SP readstring pop 0 40 PWidth { O (% ) writestring % 82 bytes on each line, plus EOL SP exch 40 PWidth 2 index sub .min getinterval O exch writehexstring O (\n) writestring } for pop } for (%%EndPreview) WL % Write the line that followed the %%EndComments LineAfterEndComments WL % Copy the remainder of the inputfile { I S readstring exch O exch writestring not { exit } if } loop % If we created a tempfile, delete it TName null ne { TName deletefile } if quit