| Xpdf |
| ==== |
| |
| version 3.00 |
| 2004-jan-22 |
| |
| The Xpdf software and documentation are |
| copyright 1996-2004 Glyph & Cog, LLC. |
| |
| Email: derekn@foolabs.com |
| WWW: http://www.foolabs.com/xpdf/ |
| |
| The PDF data structures, operators, and specification are |
| copyright 1985-2003 Adobe Systems Inc. |
| |
| |
| What is Xpdf? |
| ------------- |
| |
| Xpdf is an open source viewer for Portable Document Format (PDF) |
| files. (These are also sometimes also called 'Acrobat' files, from |
| the name of Adobe's PDF software.) The Xpdf project also includes a |
| PDF text extractor, PDF-to-PostScript converter, and various other |
| utilities. |
| |
| Xpdf runs under the X Window System on UNIX, VMS, and OS/2. The non-X |
| components (pdftops, pdftotext, etc.) also run on Win32 systems and |
| should run on pretty much any system with a decent C++ compiler. |
| |
| Xpdf is designed to be small and efficient. It can use Type 1 or |
| TrueType fonts. |
| |
| |
| Distribution |
| ------------ |
| |
| Xpdf is licensed under the GNU General Public License (GPL), version |
| 2. In my opinion, the GPL is a convoluted, confusing, ambiguous mess. |
| But it's also pervasive, and I'm sick of arguing. And even if it is |
| confusing, the basic idea is good. |
| |
| In order to cut down on the confusion a little bit, here are some |
| informal clarifications: |
| |
| - I don't mind if you redistribute Xpdf in source and/or binary form, |
| as long as you include all of the documentation: README, man pages |
| (or help files), and COPYING. (Note that the README file contains a |
| pointer to a web page with the source code.) |
| |
| - Selling a CD-ROM that contains Xpdf is fine with me, as long as it |
| includes the documentation. I wouldn't mind receiving a sample |
| copy, but it's not necessary. |
| |
| - If you make useful changes to Xpdf, please make the source code |
| available -- post it on a web site, email it to me, whatever. |
| |
| If you're interested in commercial licensing, please see the Glyph & |
| Cog web site: |
| |
| http://www.glyphandcog.com/ |
| |
| |
| Compatibility |
| ------------- |
| |
| Xpdf is developed and tested on a Linux 2.4 x86 system. |
| |
| In addition, it has been compiled by others on Solaris, AIX, HP-UX, |
| Digital Unix, Irix, and numerous other Unix implementations, as well |
| as VMS and OS/2. It should work on pretty much any system which runs |
| X11 and has Unix-like libraries. You'll need ANSI C++ and C compilers |
| to compile it. |
| |
| The non-X components of Xpdf (pdftops, pdftotext, pdfinfo, pdffonts, |
| pdftoppm, and pdfimages) can also be compiled on Win32 systems. See |
| the Xpdf web page for details. |
| |
| If you compile Xpdf for a system not listed on the web page, please |
| let me know. If you're willing to make your binary available by ftp |
| or on the web, I'll be happy to add a link from the Xpdf web page. I |
| have decided not to host any binaries I didn't compile myself (for |
| disk space and support reasons). |
| |
| If you can't get Xpdf to compile on your system, send me email and |
| I'll try to help. |
| |
| Xpdf has been ported to the Acorn, Amiga, BeOS, and EPOC. See the |
| Xpdf web page for links. |
| |
| |
| Getting Xpdf |
| ------------ |
| |
| The latest version is available from: |
| |
| http://www.foolabs.com/xpdf/ |
| |
| or: |
| |
| ftp://ftp.foolabs.com/pub/xpdf/ |
| |
| Source code and several precompiled executables are available. |
| |
| Announcements of new versions are posted to several newsgroups |
| (comp.text.pdf, comp.os.linux.announce, and others) and emailed to a |
| list of people. If you'd like to receive email notification of new |
| versions, just let me know. |
| |
| |
| Running Xpdf |
| ------------ |
| |
| To run xpdf, simply type: |
| |
| xpdf file.pdf |
| |
| To generate a PostScript file, hit the "print" button in xpdf, or run |
| pdftops: |
| |
| pdftops file.pdf |
| |
| To generate a plain text file, run pdftotext: |
| |
| pdftotext file.pdf |
| |
| There are four additional utilities (which are fully described in |
| their man pages): |
| |
| pdfinfo -- dumps a PDF file's Info dictionary (plus some other |
| useful information) |
| pdffonts -- lists the fonts used in a PDF file along with various |
| information for each font |
| pdftoppm -- converts a PDF file to a series of PPM/PGM/PBM-format |
| bitmaps |
| pdfimages -- extracts the images from a PDF file |
| |
| Command line options and many other details are described in the man |
| pages (xpdf.1, etc.) and the VMS help files (xpdf.hlp, etc.). |
| |
| |
| Upgrading from Xpdf 2.xx |
| ------------------------ |
| |
| WARNING: Xpdf 3.00 switched to a new PDF rasterizer, which no longer |
| uses X fonts. You'll need a set of Base-14 fonts -- the URW fonts |
| distributed with ghostscript can be used for this. Xpdf will search |
| for the URW fonts, but if you have them installed in a non-standard |
| directory, you'll need to set up an xpdfrc config file to point to |
| them. For full details, please see the xpdfrc(5) man page. |
| |
| |
| Compiling Xpdf |
| -------------- |
| |
| See the separate file, INSTALL. |
| |
| |
| Bugs |
| ---- |
| |
| If you find a bug in Xpdf, i.e., if it prints an error message, |
| crashes, or incorrectly displays a document, and you don't see that |
| bug listed here, please send me email, with a pointer (URL, ftp site, |
| etc.) to the PDF file. |
| |
| |
| Acknowledgments |
| --------------- |
| |
| Thanks to: |
| |
| * Patrick Voigt for help with the remote server code. |
| * Patrick Moreau, Martin P.J. Zinser, and David Mathog for the VMS |
| port. |
| * David Boldt and Rick Rodgers for sample man pages. |
| * Brendan Miller for the icon idea. |
| * Olly Betts for help testing pdftotext. |
| * Peter Ganten for the OS/2 port. |
| * Michael Richmond for the Win32 port of pdftops and pdftotext and the |
| xpdf/cygwin/XFree86 build instructions. |
| * Frank M. Siegert for improvements in the PostScript code. |
| * Leo Smiers for the decryption patches. |
| * Rainer Menzner for creating t1lib, and for helping me adapt it to |
| xpdf. |
| * Pine Tree Systems A/S for funding the OPI and EPS support in |
| pdftops. |
| * Easy Software Products for funding the "sh" operator support. |
| * Tom Kacvinsky for help with FreeType and for being my interface to |
| the FreeType team. |
| * Theppitak Karoonboonyanan for help with Thai support. |
| * Leonard Rosenthol for help and contributions on a bunch of things. |
| * Alexandros Diamantidis and Maria Adaloglou for help with Greek |
| support. |
| * Lawrence Lai for help with the CJK Unicode maps. |
| |
| Various people have contributed modifications made for use by the |
| pdftex project: |
| |
| * Han The Thanh |
| * Martin Schrรถder of ArtCom GmbH |
| |
| |
| References |
| ---------- |
| |
| Adobe Systems Inc., _PDF Reference: Adobe Portable Document Format |
| Version 1.5_. |
| http://partners.adobe.com/asn/tech/pdf/specifications.jsp |
| [The manual for PDF version 1.5.] |
| |
| Adobe Systems Inc., _PostScript Language Reference_, 3rd ed. |
| Addison-Wesley, 1999, ISBN 0-201-37922-8. |
| [The official PostScript manual.] |
| |
| Adobe Systems, Inc., _The Type 42 Font Format Specification_, |
| Adobe Developer Support Technical Specification #5012. 1998. |
| http://partners.adobe.com/asn/developer/pdfs/tn/5012.Type42_Spec.pdf |
| [Type 42 is the format used to embed TrueType fonts in PostScript |
| files.] |
| |
| Adobe Systems, Inc., _Adobe CMap and CIDFont Files Specification_, |
| Adobe Developer Support Technical Specification #5014. 1995. |
| http://www.adobe.com/supportservice/devrelations/PDFS/TN/5014.CIDFont_Spec.pdf |
| [CMap file format needed for Japanese and Chinese font support.] |
| |
| Adobe Systems, Inc., _Adobe-Japan1-4 Character Collection for |
| CID-Keyed Fonts_, Adobe Developer Support Technical Note #5078. |
| 2000. |
| http://partners.adobe.com/asn/developer/PDFS/TN/5078.CID_Glyph.pdf |
| [The Adobe Japanese character set.] |
| |
| Adobe Systems, Inc., _Adobe-GB1-4 Character Collection for |
| CID-Keyed Fonts_, Adobe Developer Support Technical Note #5079. |
| 2000. |
| http://partners.adobe.com/asn/developer/pdfs/tn/5079.Adobe-GB1-4.pdf |
| [The Adobe Chinese GB (simplified) character set.] |
| |
| Adobe Systems, Inc., _Adobe-CNS1-3 Character Collection for |
| CID-Keyed Fonts_, Adobe Developer Support Technical Note #5080. |
| 2000. |
| http://partners.adobe.com/asn/developer/PDFS/TN/5080.CNS_CharColl.pdf |
| [The Adobe Chinese CNS (traditional) character set.] |
| |
| Adobe Systems Inc., _Supporting the DCT Filters in PostScript Level |
| 2_, Adobe Developer Support Technical Note #5116. 1992. |
| http://www.adobe.com/supportservice/devrelations/PDFS/TN/5116.PS2_DCT.PDF |
| [Description of the DCTDecode filter parameters.] |
| |
| Adobe Systems Inc., _Open Prepress Interface (OPI) Specification - |
| Version 2.0_, Adobe Developer Support Technical Note #5660. 2000. |
| http://partners.adobe.com/asn/developer/PDFS/TN/5660.OPI_2.0.pdf |
| |
| Adobe Systems Inc., CMap files. |
| ftp://ftp.oreilly.com/pub/examples/nutshell/cjkv/adobe/ |
| [The actual CMap files for the 16-bit CJK encodings.] |
| |
| Adobe Systems Inc., Unicode glyph lists. |
| http://partners.adobe.com/asn/developer/type/unicodegn.html |
| http://partners.adobe.com/asn/developer/type/glyphlist.txt |
| http://partners.adobe.com/asn/developer/type/corporateuse.txt |
| http://partners.adobe.com/asn/developer/type/zapfdingbats.txt |
| [Mappings between character names to Unicode.] |
| |
| Aldus Corp., _OPI: Open Prepress Interface Specification 1.3_. 1993. |
| http://partners.adobe.com/asn/developer/PDFS/TN/OPI_13.pdf |
| |
| Anonymous, RC4 source code. |
| ftp://ftp.ox.ac.uk/pub/crypto/misc/rc4.tar.gz |
| ftp://idea.sec.dsi.unimi.it/pub/crypt/code/rc4.tar.gz |
| [This is the algorithm used to encrypt PDF files.] |
| |
| T. Boutell, et al., "PNG (Portable Network Graphics) Specification, |
| Version 1.0. RFC 2083. |
| [PDF uses the PNG filter algorithms.] |
| |
| CCITT, "Information Technology - Digital Compression and Coding of |
| Continuous-tone Still Images - Requirements and Guidelines", CCITT |
| Recommendation T.81. |
| http://www.w3.org/Graphics/JPEG/ |
| [The official JPEG spec.] |
| |
| A. Chernov, "Registration of a Cyrillic Character Set". RFC 1489. |
| [Documentation for the KOI8-R Cyrillic encoding.] |
| |
| Roman Czyborra, "The ISO 8859 Alphabet Soup". |
| http://czyborra.com/charsets/iso8859.html |
| [Documentation on the various ISO 859 encodings.] |
| |
| L. Peter Deutsch, "ZLIB Compressed Data Format Specification version |
| 3.3". RFC 1950. |
| [Information on the general format used in FlateDecode streams.] |
| |
| L. Peter Deutsch, "DEFLATE Compressed Data Format Specification |
| version 1.3". RFC 1951. |
| [The definition of the compression algorithm used in FlateDecode |
| streams.] |
| |
| Jim Flowers, "X Logical Font Description Conventions", Version 1.5, X |
| Consortium Standard, X Version 11, Release 6.1. |
| ftp://ftp.x.org/pub/R6.1/xc/doc/hardcopy/XLFD/xlfd.PS.Z |
| [The official specification of X font descriptors, including font |
| transformation matrices.] |
| |
| Foley, van Dam, Feiner, and Hughes, _Computer Graphics: Principles and |
| Practice_, 2nd ed. Addison-Wesley, 1990, ISBN 0-201-12110-7. |
| [Colorspace conversion functions, Bezier spline math.] |
| |
| Robert L. Hummel, _Programmer's Technical Reference: Data and Fax |
| Communications_. Ziff-Davis Press, 1993, ISBN 1-56276-077-7. |
| [CCITT Group 3 and 4 fax decoding.] |
| |
| ISO/IEC, _Information technology -- Lossy/lossless coding of bi-level |
| images_. ISO/IEC 14492, First edition (2001-12-15). |
| http://webstore.ansi.org/ |
| [The official JBIG2 standard. The final draft of this spec is |
| available from http://www.jpeg.org/jbighomepage.html.] |
| |
| ISO/IEC, _Information technology -- JPEG 2000 image coding system -- |
| Part 1: Core coding system_. ISO/IEC 15444-1, First edition |
| (2000-12-15). |
| http://webstore.ansi.org/ |
| [The official JPEG 2000 standard. The final committee draft of this |
| spec is available from http://www.jpeg.org/JPEG2000.html, but there |
| were changes made to the bitstream format between that draft and the |
| published spec.] |
| |
| ITU, "Standardization of Group 3 facsimile terminals for document |
| transmission", ITU-T Recommendation T.4, 1999. |
| ITU, "Facsimile coding schemes and coding control functions for Group 4 |
| facsimile apparatus", ITU-T Recommendation T.6, 1993. |
| http://www.itu.int/ |
| [The official Group 3 and 4 fax standards - used by the CCITTFaxDecode |
| stream, as well as the JBIG2Decode stream.] |
| |
| Christoph Loeffler, Adriaan Ligtenberg, George S. Moschytz, "Practical |
| Fast 1-D DCT Algorithms with 11 Multiplications". IEEE Intl. Conf. on |
| Acoustics, Speech & Signal Processing, 1989, 988-991. |
| [The fast IDCT algorithm used in the DCTDecode filter.] |
| |
| Microsoft, _TrueType 1.0 Font Files_, rev. 1.66. 1995. |
| http://www.microsoft.com/typography/tt/tt.htm |
| [The TrueType font spec (in MS Word format, naturally).] |
| |
| Thai Industrial Standard, "Standard for Thai Character Codes for |
| Computers", TIS-620-2533 (1990). |
| http://www.nectec.or.th/it-standards/std620/std620.htm |
| [The TIS-620 Thai encoding.] |
| |
| P. Peterlin, "ISO 8859-2 (Latin 2) Resources". |
| http://sizif.mf.uni-lj.si/linux/cee/iso8859-2.html |
| [This is a web page with all sorts of useful Latin-2 character set and |
| font information.] |
| |
| Charles Poynton, "Color FAQ". |
| http://www.inforamp.net/~poynton/ColorFAQ.html |
| [The mapping from the CIE 1931 (XYZ) color space to RGB.] |
| |
| R. Rivest, "The MD5 Message-Digest Algorithm". RFC 1321. |
| [MD5 is used in PDF document encryption.] |
| |
| Unicode Consortium, "Unicode Home Page". |
| http://www.unicode.org/ |
| [Online copy of the Unicode spec.] |
| |
| W3C Recommendation, "PNG (Portable Network Graphics) Specification |
| Version 1.0". |
| http://www.w3.org/Graphics/PNG/ |
| [Defines the PNG image predictor.] |
| |
| Gregory K. Wallace, "The JPEG Still Picture Compression Standard". |
| ftp://ftp.uu.net/graphics/jpeg/wallace.ps.gz |
| [Good description of the JPEG standard. Also published in CACM, April |
| 1991, and submitted to IEEE Transactions on Consumer Electronics.] |
| |
| F. Yergeau, "UTF-8, a transformation format of ISO 10646". RFC 2279. |
| [A commonly used Unicode encoding.] |
