thumbpdf for PDF thumbnails in tex documents
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README.md

README for project thumbpdf 2018/09/07 v3.17

TABLE OF CONTENTS

A. Project thumbpdf B. Copyright, Disclaimer, License C. Files D. Requirements E. Installation F. User Interface G. Author H. Questions, Suggested Improvements I. Known Problems J. History

A. PROJECT THUMBPDF

THUMBPDF adds thumbnails to TeX documents which will be converted to PDF files. The following routes are supported by this package:

  • pdfTeX
  • dvips/ps2pdf (with Ghostscript version 6.0)
  • dvips/Distiller (tested with versions 3 and 4)
  • VTeX in PostScript mode (tested with versions 7.51, 7.53) Because the support for dvips/ps2pdf, dvips/Distiller, and VTeX/PS uses pdfmark specials both routes are shortly called the pdfmark route in the following.

Both plain and LaTeX formats are supported.

Thumbnails are small images, pictograms or reduced images from the pages of a document. They support the navigation through the document if the viewer supports it (e. g. AcrobatReader).

The mode of action: In the following the user TeX file is called <jobname>.tex'. 0. The user compiles the TeX file to get.pdf'.

  1. Now the perl script generates the thumbnails in the form of png images by the help of Ghostscript. Versions below 5.50 are not recommended because of some bugs in the pdf support of Ghostscript (see section I. Known Problems).
  2. Then pdfTeX compiles the driver file thumbpdf.tex' which looks for these thumbnails and includes them as images.thumbpdf.pdf' will contain on each page a thumbnail.
  3. The perl script scans thumbpdf.pdf' to get the thumbnails as pdf objects. They are written in data files:.tpt' for pdfTeX and `.tpm' for the pdfmark route.
  4. If the user compiles now his TeX file which loads package `thumbpdf.sty' then he gets a pdf file with thumbnails.

B. COPYRIGHT, DISCLAIMER, LICENSE

Copyright (C) 1999-2014 Heiko Oberdiek.

This work may be distributed and/or modified under the conditions of the LaTeX Project Public License, either version 1.3 of this license or (at your option) any later version. The latest version of this license is in http://www.latex-project.org/lppl.txt and version 1.3 or later is part of all distributions of LaTeX version 2003/12/01 or later.

This work has the LPPL maintenance status "maintained".

This Current Maintainer of this work is Heiko Oberdiek.

C. FILES

The project thumbpdf' consists of four files: thumbpdf(.pl): This perl script is the main program. The extension.pl' may be omitted. thumbpdf.tex: A pdfTeX program to produce the thumbnail pdf file (A2.). thumbpdf.sty: The package for the user to be included in his TeX source (A4.) README: Documentation, the file you are reading.

Following temporary files are produced if thumbpdf' is invoked: thb*.png: The thumbnails in PNG format:thb1.png', thb2.png', ...,thb10.png', ... thumbpdf.pdf: The thumbnail pdf file (A2.). thumbpdf.log: The protocol file of the pdfTeX run (A2.).

The result is written to (A3.): .tpt: Thumbnail data file for pdfTeX. (tpt = Thumbnail PdfTex) .tpm: Thumbnail data file as pdfmark specials for the pdfmark route. (tpm = Thumbnail PdfMark)

Additional thumbnails for the \thisthumb' feature have to be declared in the file.tno'. This can also be done with \DeclareThumbs in the user's TeX file. Package thumbpdf.sty' then writes the file.tno'. (tno = ThumbNail Optional)

D. REQUIREMENTS

  • Perl5 (version 5 of the perl interpreter).
  • Ghostscript:
    • Thumbnail generation: version 5.50 or better 6.0 (see section I.)
    • Including thumbnails with ps2pdf: version 6.0.
  • pdfTeX (also when pdfmark mode is used).

E. INSTALLATION

  1. TeX directory structure (TDS, see CTAN:tds/tds.pdf): The archive thumbpdf.tds.zip' contains all the files sorted into a TDS tree (texmf tree): CTAN:install/support/thumbpdf.tds.zip For installation just unpackthumbpdf.tds.zip' in the texmf tree of your choice and update the file data base when your distribution supports it (mikTeX, teTeX, TeX Live, ...). Check E.2 for installation of the perl script.

    Alternatively you can install the files manually: The files readme.txt' (documentation)thumbpdf.tex' (pdftex) `thumbpdf.sty' (pdf(e)tex, pdf(e)latex, (e)tex, (e)latex) go to texmf/doc/generic/thumbpdf/readme.txt texmf/tex/generic/thumbpdf/thumbpdf.tex texmf/tex/generic/thumbpdf/thumbpdf.sty (These now definite places in the TDS tree are a result of a discussion with Thomas Esser, who supports them in his great teTeX 1.0).

  2. Perl script `thumbpdf.pl':

    Unix

    • Your are allowed to rename thumbpdf.pl' tothumbpdf': mv thumbpdf.pl thumbpdf
    • Ensure that the execute permission is set: chmod +x thumbpdf
    • Move the file to a directory where the shell can find it (environment variable PATH, e.g. /usr/local/bin/).

    Dos/Windows/(OS2)

    • Running the perl interpreter directly with the perl script: perl thumbpdf.pl ...
    • Methods for calling by typing the script name without extension and perl interpreter: a) If your perl distribution provides a pl2exe program, use it to generate thumbpdf.exe'. Advantage: I/O redirection works. b) A good method is a dos program of John Dallman: #!perl.exe (versions below 4) hbperl.exe (version 4) http://www.perl.com/CPAN/authors/id/JDALLMAN/hbp_403.zip Move thumbpdf.pl in a PERLLIB directory and copy the exe program tothumbpdf.exe'. Then the program looks for the perl interpreter, the script and calls them. Advantage: I/O redirection works. c) Windows NT 4.0 users can use associated file types: SET PATHEXT=.pl;%PATHEXT% See perl win32 faq "How do I associate Perl scripts with perl?": http://www.activestate.com/support/faqs/win32/perlwin32faq4.html Disadvantage: I/O redirection does not work. d) 4DOS: SET .PL=c:/bin/perl.exe See perl win32 faq "How can I get Perl to run a Perl script at the 4DOS command line by typing the name of the script without the extension or "perl", just like a regular exe file?": http://www.activestate.com/support/faqs/win32/perlwin32faq1.html e) Convert the perl script to a batch file thumbpdf.bat', if your distribution providespl2bat.bat'. Disadvantage: I/O redirection does not work. Many of this methods are listed in the perl win32 faq "What's the equivalent of the shebang ("#!") syntax for Win32?": http://www.activestate.com/support/faqs/win32/perlwin32faq4.html
    • TeXLive 7+/fpTeX contain a compiled version "thumbpdf.exe".

    Dos

    • I do not know a precompiled Ghostscript interpreter for version 5.5 or 6.0. Version 5.10 misses the png devices. So you have to compile Ghostscript for dos or you can use another program to generate the thumbnails (names: thb1.png',thb2.png', ...).
    • If Ghostscript cannot be started by perl because of serious problems (segmentation faults, ...), option printgscmd' can be used: Thumbpdf prints the command line arguments for the ghostscript call in the filethumbpdf.gs' and finishes. Then Ghostscript can manually be invoked to create the png files, e.g.: gs386/gswin32c @thumbpdf.gs (DOS/Win3.1) You need a Ghostscript executable that contains the png devices. For example version 5.50 can be run under Win3.1/Win32s by making a program icon with the correct working directory and the command PATH/gswin32(c) @thumbpdf.gs', e.g: c:\gstools\gs5.50\gswin32 -Ic:\gstools\gs5.50 @thumbpdf.gs In the next call of thumbpdf the Ghostscript step is omitted by optionnomakepng'. Example command sequence: thumbpdf --printgscmd test gswin32c @thumbpdf.gs thumbpdf --nomakepng test

    Windows 3.1x with win32s

    • The png files can be produced with gswin32(c), but the means of the operating system to start windows programs with command line arguments are very poor. I found no way to invoke Ghostscript via perl, so the thumbnails must be generated manually (see above).

F. USER INTERFACE

  • The perl script thumbpdf.pl' can be invoked in two ways: a) thumbpdf --help prints a help screen with the options and some default values. b) thumbpdf [options] <jobname>[.pdf|.ps]' is the file name of user's TeX file without extension. The extension .pdf' can be omitted. If option--useps' is active, thumbpdf will look for `.ps'.

    Action options (see section C.): --makepng: Call of Ghostscript to generate the thumbnails (A1.). --makepdf: Call of pdfTeX to produce a thumbnail pdf file (A2.). --makedata: Parsing of this pdf file and writing the bject represenation to <jobname>.tpt' or.tpm' (A3.). --clean: Removing of the temporary files.

    Configuration options for --makepng: --useps: Use the PostScript file <jobname>.ps' instead of the pdf file.pdf' for generating the thumbnails. --gscmd : Name of the ghostscript command. --device|png [png]: (dev = mono, gray, 16, 256, 16m) Ghostscript device for producing the thumbnails, e.g.: --device=mono, --device=pnggray, --png=256 --resolution: Without the option thumbpdf checks the /MediaBox and calculates the resolution, that neither height nor width exceed the recommended 106 pixels. For a4 or letter paper the resolution is about 9 DPI. With this option, the default behaviour can be overwritten. --compress: The compress level of the thumbnail images. There is no reason not to use the maximal value, except for debugging or drafts. * Note for the pdfTeX route: Value 10 has a special meaning: streams are compressed like value 9, but unnecessary white spaces are removed in the dictionaries * Note for Distiller: The Distiller does not recognize compressed streams and uses its own settings to compress the streams. Because previously compressed streams are not detected and /Filter entries are overwritten, the double compressed streams will be invalid. Therefore the PostScript code in <jobname>.tpm' uncompresses the streams, if Distiller is detected. Although the compression of thumbpdf is quite useless with Distiller, compression can be turned on for a possible reuse with ps2pdf or to keep the file.tpm' small. --password: Password for an encrypted pdf file. The following patch is required for ghostscript: http://www.ozemail.com.au/~geoffk/pdfencrypt/pdf_sec.ps --antialias: Set anti-aliasing parameters for ghostscript. It expects numbers with values 0, 1, 2, or 4. The meaning of 0 and 1 is the same and disables anti-aliasing. If two numbers are given, the first sets anti-aliasing for text (TextAlphaBits), the second for graphics (GraphicsAlphaBits). If only one number is present, then it is taken for both text and graphics. Examples: --antialias=1 disable anti-aliasing --antialias=4 max. anti-aliasing --antialias=14 -dTextAlphaBits=1 -dGraphicsAlphaBits=4 --greek: The text is printed in Greek style, the characters are replaced by gray boxes. Three limitations: * Only fonts in Type 1 format are supported. * The show' operator is redefined inuserdict'. So it will not work, if the characters are displayed by other methods. * The color is lightened, assuming a white background. Status: experimental.

    Configuration option for --makedata: --modes: Select the modes for which you want that thumbpdf generates the thumbnail data files: * pdftex: .tpt * pdfmark|dvips|ps2pdf|vtexpdfmark: .tpm * all: synonym for the list pdftex,pdfmark' --level2:.tpm' is written with PostScript level 2 features to reduce the size of this file. (This decreases the size of the final PostScript file, but does not affect the size of the final pdf file.)

    Options for message control: --quiet Messages except warnings are suppressed. --verbose Informations about the actions are printed. --debug Additional messages for debugging purposes. Also option `--clean' is disabled.

    Environment variable THUMBPDF': Before scanning the command line for options the perl scriptthumbpdf.pl' looks for the environment variable THUMBPDF'. Example (bash syntax): export THUMBPDF="--modes=pdfmark --level2" To avoid syntax errors the equal sign can be replaced by a space, for example (DOS syntax): SET THUMBPDF=--modes pdfmark --level2 The reason for this environment variable is, that users of ps2pdf can omit the option 'modes', if they have setTHUMBPDF': SET THUMBDPF=--modes pdfmark Or if both data files should be generated: SET THUMBPDF=--modes all

  • Package `thumbpdf.sty'

    • LaTeX format: \usepackage{thumbpdf} Options: pdftex, pdfmark, dvips, ps2pdf (the last three options are synonyms).
    • Plain format: \input thumbpdf.sty Define \ThumbpdfDriver to inform `thumbpdf.sty' about the driver: \def\ThumbpdfDriver{ps2pdf}\input thumbpdf.sty
    • If you want to use option pdfmark' in all cases exept pdfTeX in pdf mode, you can use a configuration filethumbpdf.cfg': \ifx\ThumbpdfDriver\UnDeFiNeD \def\ThumbpdfDriver{pdfmark}% \fi \endinput This works, because \ThumbpdfDriver' is ignored, if pdfTeX in pdf mode is detected. A more politically correct example of the configuration filethumbpdf.cfg': \expandafter\ifx\csname ThumbpdfDriver\endcsname\relax \def\ThumbpdfDriver{pdfmark}% \ifx\pdfoutput\UnDeFiNeD \else \ifx\pdfoutput\relax \else \ifnum\pdfoutput>0 \def\ThumbpdfDriver{pdftex}% \fi \fi \fi \fi \endinput
    • Because pdfTeX can be detected at run time, it is not necessary to specify driver `pdftex'; even the other drivers are ignored.
    • \thisthumb{name} uses the thumbnail mentioned in `.tno' for this page. (This file can be written by the \DeclareThumbs feature, see below.)
    • \DeclareThumbs contains the content of the file `.tno', see below.
  • Additional thumbnails: <jobname>.tno' If.tno' is found, the thumbnails are automatically included by the program `thumbpdf.tex'. Format of this file:#

  \thumb{filename without `.png' extension}% or
  \thumb[name]{filename with/without extension}

Examples:

    \thumb{one}%      --> \thisthumb{one}, recommended
    \thumb{one.png}%  --> \thisthumb{one.png}
    \thumb[two]{one}% --> \thisthumb{two}
    \thumb[one]{./extrathumb/one.png}% --> thisthumb{one}

The first example shows that the .png' extension is supported and recommended. But.jpg' or .tif' files also work. This data can be included in the main tex file that includesthumbpdf.sty' with the \DeclareThumbs feature:

\usepackage{thumbpdf}% or \input thumbpdf.sty
    \DeclareThumbs{
      \thumb{one}
      \thumb[two]{./extra/two.jpg}
    }

Then the file `\jobname.tno' is written with the thumbnail declarations. (LaTeX's \nofiles is respected.)

  • Program thumbpdf.tex' Execept for debugging there is no reason for an user to call it manually. But if so the number of the files to be looked for can be reduced, because it takes some time to test 1000 thumbnails if they exist. A maximum number can be specified before: pdftex \def\thumbmax{20}\input thumbpdf The highest thumbnail is nowthumb020.png'. <jobname>.tno' can only be found, ifthumbpdf.tex' knows about this <jobname>': \pdftex \def\thumbjob{<jobname>}\input thumbpdf If\thumbjob' is undefined, thumbpdf.tex' looks forthumbopt.tex'.

Example: Addition of thumbnails for `example.tex': pdfelatex example % or pdf(e)(la)tex, whatever example needs. thumbpdf example pdfelatex example % example.tex contains \usepackage{thumbpdf} or for the dvips/ps2pdf route: latex example dvips example ps2pdf example.ps example.pdf thumbpdf --modes=dvips example latex example % example.tex contains \usepackage[dvips]{thumbpdf} dvips example ps2pdf example.ps example.pdf

  • Option `clean': It clears the temporary files of the current thumbpdf run:
    • thumb*.png (by `makepng')
    • thumbpdf.pdf, thumbpdf.log (by makepdf') Previously generated files are untouched. This option will be automatically disabled, if optionsdebug', nomakepdf', ornomakedef' are active.

G. AUTHOR

Heiko Oberdiek Email: heiko.oberdiek at googlemail.com ho-tex at tug.org

H. QUESTIONS, SUGGESTED IMPROVEMENTS

If you have questions, problems with `thumbpdf', error reports, if you have improvements or want to have additional features, please send them via github issues: https://github.com/ho-tex/thumbpdf/issues

Other ps->pdf routes:

  • pstill: I did not succeed. It seems that the used pdfmark specials are not supported.
  • Adobe Distiller: Because I do not have access to it, I am curious to hear whether it works. Theoretically it should.

I. KNOWN PROBLEMS

  • Compressed PDF objects (version PDF-1.5) are not supported, thus the PDF file should be generated with \pdfobjcompresslevel=0, before running thumbpdf.
  • The most bug reports I get are perl script error messages regarding Ghostscript. Especially versions below 5.50 often have problems with the pdf support. Sometimes it can be necessary to update to version 6.0. Before writing a bug report, please check, if your pdf file is processible by your Ghostscript version. If upgrading do not help, you have two possibilities: a) Use of another program to generate the thumbnails. But an other program that uses Ghostscript to do the job will not help of course. The thumbnails should be named thb1.png',thb2.png', ... Then run thumbpdf' and omit the Ghostscript step by the option--nomakepng'. b) Generate a PostScript version of your TeX file and run thumbpdf' with option--useps'. Getting the PostScript file by Acrobat's conversion feature often fails. So it is better to generate the PostScript file from the TeX source with TeX/dvips, for example.
  • Incompatibility with option pdfpagetransition' of packagehyperref' versions below 6.64. This option overwrites the previous contents of \pdfpageattr', used bythumbpdf.sty'.
  • If there is a package that overloads \shipout' to rearrange pages (two pages to one, ...), thenthumbpdf.sty' should be loaded first.
  • Some builds of the perl port of ActiveState, version 5.6.0 for Windows do not work correctly: for example, after a successful call of system commands with the backtick operator (``), $? ($CHILD_ERROR) returns -1 instead of 0. Summary of informations contributed by users:
    • These builds for Windows do not work: 612, 613, 616 ? Windows port: 618 (one user suceeds, one user fails)
    • The following Windows builds work: 522
    • The Linux versions work. Workaround: Use another version or port, see `http://www.cpan.org/'.

J. HISTORY

1999/02/14 v1.0 first release

1999/02/23 v1.1

  • Bug in thumbpdf.sty removed (#2->#1).
  • New option in thumbpdf.pl: --resolution.
  • Automatic calculation of the resolution for Ghostscript (max. size 106x106).

1999/03/01 v1.2

  • Optimizition: indirect objects for length values removed.

1999/03/12 v1.3

  • Copyright: LPPL

1999/05/05 v1.4

  • Detecting of cygwin-perl.
  • Save memory by sharing `RGB' objects (devices: png16, png256).

1999/06/13 v1.5

  • Gs detection extended (thumbpdf.pl).
  • Installation part of readme.txt rewritten and table of contents added.

1999/07/27 v1.6

  • Bug in thumbpdf.sty fixed (handling of \pdfpageattr).
  • Warning if there are missing thumbs (thumbpdf.sty).
  • Added section Known Problems' inreadme.txt'.

1999/08/08 v1.7

  • Bug in thumbpdf.sty fixed. This bug was introduced in version 1.6, therefore this version should not be used.
  • Adaptation for pdfTeX version 0.14a.
  • LPPL 1.1

1999/09/09 v1.8

  • Bug in thumbpdf.sty fixed. \PackageWarning cannot be used in \shipout, because \protect has been set to \noexpand (mysterious LaTeX behaviour?).

1999/09/16 v1.9

  • The perl script now detects direct /Length objects, that pdfTeX uses including JPEG images.

2000/01/11 v1.10

  • Bug in /Length detection removed.
  • Direct /Length in RGB objects supported.
  • \immediate before \pdfximage removed.
  • thumbpdf.sty revised.

2000/01/19 v1.11

  • Small fix for perl versions that cannot handle "my" in "for" loops.
  • LPPL 1.2

2000/02/11 v1.12 (not released)

  • Option `clean' added.
  • <jobname>.tnd' replacesthumbpdf.tex', if thumbpdf is called: thumbpdf [options] [.pdf]
  • <jobname>.tno' can be used instead ofthumbopt.tex'.
  • \DeclareThumbs added.

2000/02/22 v2.0

  • Support for the dvips/ps2pdf route by pdfmark specials.
  • Temporary files are removed.
  • Renaming of files: thumb%03d.png (thumb001.png) ==> thb%d.png (thb1.png) thumbdta.tex ==> .tpt, .tpm added thumbopt.tex ==> .tno
  • Syntax change: is now required.

2000/02/28 v2.1

  • Environment variable `THUMBPDF' supported.
  • `thumbpdf.cfg' supported.
  • TDS place for readme.txt: texmf/doc/generic/thumbpdf/readme.txt
  • Errors in `readme.txt' corrected.

2000/03/07 v2.2

  • Support for Distiller 3 and 4, the streams are uncompressed.
  • Call of gs is changed in order to show the currently processed page number of the pdf file.
  • Option --printgscmd creates the command line file `thumbpdf.gs' for the Ghostscript call.

2000/03/22 v2.3

  • Bug fix: --useps now works.

2000/04/10 v2.4

  • Fix for ActiveState Perl 5.6.0: uc line changed, fork removed. (Thanks to Andreas Buehmann andreas.buehmann@gmx.de.)
  • Test of `thumbpdf.tex' version.

2000/07/29 v2.5

  • Save trick in call of ghostscript.
  • Undocumented option --gspages added.
  • Problem with ActiveState perl 5.6.0 (win32) added to section "Known Problems".

2000/09/27 v2.6

  • Information about ActiveState perl 5.6.0 updated.

2000/10/27 v2.7

  • -dFIXEDMEDIA=0 added in gs call.

2001/01/12 v2.8:

  • Bug fix in dvips mode and active option `level2': pack parameter corrected for little-endian machines.
  • /Rotate in pdf pages: ghostscript versions around 6.01 have added a hack in /pdfshowpage_setpage, that ignores the /Rotate entry. A patch is added to disable the hack.
  • Ghostscript uses the MediaBox for calculating the page size. For version 6.50 a patch is added to use the /CropBox instead.

2001/03/29 v2.9:

  • Option --password added.

2001/04/02 v2.10:

  • Small corrections in readme.txt, contributed by Michael Wiedmann.

2001/04/26 v2.11:

  • Option --antialias added (suggestion of Juergen Bausa).
  • This version is not released.

2002/01/11 v3.0:

  • Syntax of option --antialias changed. The option is enabled as default, so that the ghostscript step is now slower.
  • Support for VTeX's PS mode added.
  • Greek mode added (experimental).
  • Signal handlers added for cleanup.

2002/05/26 v3.1:

  • SIG_HUP unkown in Windows.
  • Bug fix: The signal function for DIE "cleanup" aborts before the error message of "die" is printed. Replaced by "clean" that does not contain "exit 1".
  • Small bug fix in mode detection and mode "vtex" removed from list. "vtexpdfmark" was detected, "vtex" did not work and perhaps it will be used later for VTeX in PDF mode.

2002/05/26 v3.2:

  • Fix: "MacOS/X: darwin" is now not interpreted as Windows.

2003/03/19 v3.3:

  • Fix for gs 8.00 in mode dvips: THB_DistillerPatch also applied to ghostscript >= 8.00.

2003/06/06 v3.4:

  • Bug fix, two forgotten "pop"s added for Distiller case.

2004/10/24 v3.5:

  • Revert Cygwin detection: is unix (request by Jan Nieuwenhuizen).
  • LPPL 1.3.

2004/11/19 v3.6:

  • Bug fix for dvips mode and gs < 8.00 (/stackunderflow in pop).

2004/11/19 v3.7:

  • For easier debugging, the special thumbpdf objects are now valid PDF objects that are referenced in the Catalog.
  • Remove of extra '\n' before "endstream" that is added by pdfTeX 1.20a.

2005/07/06 v3.8:

  • Fix because of pdfTeX 1.30.

2007/11/07 v3.9:

  • Deprecation warning of perl 5.8.8 fixed.

2008/04/16 v3.10:

  • TDS archive `thumbpdf.tds.zip' provided.

2010/07/07 v3.11:

  • \pdfcompresslevel=0 and \pdfminorversion=4 added for thumbpdf.tex.
  • \input is used with file name extension for "thumbpdf.tex".
  • Warning if \pdfobjcompresslevel>0.

2011/08/09 v3.12:

  • Support for LuaTeX added.

2011/08/10 v3.13:

  • Use gswin64c in Windows with 64 bits.
  • Fix of version date of thumbpdf.sty.

2012/04/09 v3.14:

  • Fix for plain TeX compatibility (offending \RequirePackage).

2012/04/18 v3.15:

  • Option --version added.
  • File readme.txt' renamed toREADME'.

2014/07/15 v3.16

  • Patch for `thumbpdf.pl' by Norbert Preining because of
    pdfTeX 1.40.15 (TeX Live 2014).

2018/09/07 v3.17

  • Move to ho-tex github organisation https://github.com/ho-tex/thumbpdf
  • Patch for `thumbpdf.pl' by David Carlisle for new perl { regex handling
  • Update warning messages for Oberdiek bundle issue 46 from Karl Berry