readme

读写pdf文件的程序开发库源码

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.
* 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 Schr鰀er of ArtCom GmbH


References
----------

Adobe Systems Inc., _PDF Reference: Adobe Portable Document Format
version 1.4_, 3nd ed.
Addison-Wesley, 2001, ISBN 0-201-75839-3.
http://partners.adobe.com/asn/developer/acrosdk/docs/filefmtspecs/PDFReference.pdf
[The printed manual for PDF version 1.4.]

Adobe Systems Inc., _Portable Document Format: Changes from Version
1.3 to 1.4_, Adobe Developer Support Technical Note #5409.
June 11, 2001.
http://partners.adobe.com/asn/developer/acrosdk/docs/filefmtspecs/PDF14Deltas.pdf
[Updates for PDF 1.4.]

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, _Coding of Still Pictures_, IS 14492 Final Committee Draft.
http://www.jpeg.org/fcd14492.pdf
[The final draft of the JBIG2 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.]