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README for libpng 1.2.5 - October 3, 2002 (shared library 12.0)
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README for libpng version 1.2.12 - June 27, 2006 (shared library 12.0)
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See the note about version numbers near the top of png.h
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See INSTALL for instructions on how to install libpng.
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Libpng comes in two distribution formats. Get libpng-*.tar.gz if you
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want UNIX-style line endings in the text files, or lpng*.zip if you want
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DOS-style line endings.
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Libpng comes in several distribution formats. Get libpng-*.tar.gz
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or libpng-*.tar.bz2 if you want UNIX-style line endings in the text
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files, or lpng*.zip if you want DOS-style line endings.
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Version 0.89 was the first official release of libpng. Don't let the
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fact that it's the first release fool you. The libpng library has been in
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critical or an ancillary chunk.
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The changes made to the library, and bugs fixed are based on discussions
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on the PNG implementation mailing list <png-implement@ccrc.wustl.edu>
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on the PNG-implement mailing list
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and not on material submitted privately to Guy, Andreas, or Glenn. They will
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forward any good suggestions to the list.
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You can use zlib as a drop-in replacement for fread() and fwrite() if
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you are so inclined.
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zlib should be available at the same place that libpng is.
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If not, it should be at ftp.uu.net in /graphics/png
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Eventually, it will be at ftp.uu.net in /pub/archiving/zip/zlib
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zlib should be available at the same place that libpng is, or at.
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ftp://ftp.info-zip.org/pub/infozip/zlib
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You may also want a copy of the PNG specification. It is available
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as an RFC and a W3C Recommendation. Failing
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these resources you can try ftp.uu.net in the /graphics/png directory.
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as an RFC, a W3C Recommendation, and an ISO/IEC Standard. You can find
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these at http://www.libpng.org/pub/png/documents/
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This code is currently being archived at ftp.uu.net in the
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/graphics/png directory, and on CompuServe, Lib 20 (PNG SUPPORT)
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This code is currently being archived at libpng.sf.net in the
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[DOWNLOAD] area, and on CompuServe, Lib 20 (PNG SUPPORT)
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at GO GRAPHSUP. If you can't find it in any of those places,
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e-mail me, and I'll help you find it.
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This release was created and will be supported by myself (of course
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based in a large way on Guy's and Andreas' earlier work), and the PNG group.
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png-implement@ccrc.wustl.edu
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Send comments/corrections/commendations to png-mng-implement at lists.sf.net
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(subscription required; visit
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https://lists.sourceforge.net/lists/listinfo/png-mng-implement
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to subscribe) or to glennrp at users.sourceforge.net
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You can't reach Guy, the original libpng author, at the addresses
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given in previous versions of this document. He and Andreas will read mail
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addressed to the png-implement list, however.
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Please do not send general questions about PNG. Send them to
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the address in the specification (png-group@w3.org). At the same
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time, please do not send libpng questions to that address, send them to me
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or to png-implement@ccrc.wustl.edu. I'll
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the (png-list at ccrc.wustl.edu, subscription required, write to
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majordomo at ccrc.wustl.edu with "subscribe png-list" in your message).
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please do not send libpng questions to that address, send them to me
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or to the png-implement list. I'll
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get them in the end anyway. If you have a question about something
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in the PNG specification that is related to using libpng, send it
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to me. Send me any questions that start with "I was using libpng,
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to others, if necessary.
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Please do not send suggestions on how to change PNG. We have
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been discussing PNG for three years now, and it is official and
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been discussing PNG for nine years now, and it is official and
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finished. If you have suggestions for libpng, however, I'll
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gladly listen. Even if your suggestion is not used for version
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1.0, it may be used later.
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gladly listen. Even if your suggestion is not used immediately,
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it may be used later.
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Files in this distribution:
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visupng => Contains a MSVC workspace for VisualPng
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projects => Contains project files and workspaces for building DLL
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beos => Contains a Beos workspace for building libpng
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borland => Contains a Borland workspace for building libpng
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c5builder => Contains a Borland workspace for building libpng
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msvc => Contains a Microsoft Visual C++ (MSVC) workspace
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visualc6 => Contains a Microsoft Visual C++ (MSVC) workspace
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for building libpng and zlib
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netware.txt => Contains instructions for downloading a set of
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project files for building libpng and zlib on
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scripts => Directory containing scripts for building libpng:
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descrip.mms => VMS makefile for MMS or MMK
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makefile.std => Generic UNIX makefile (cc, creates static libpng.a)
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makefile.elf => Linux/ELF makefile symbol versioning,
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gcc, creates libpng12.so.0.1.2.12)
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makefile.linux => Linux/ELF makefile
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(gcc, creates libpng12.so.0.1.2.5)
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makefile.gcmmx => Linux/ELF makefile (gcc, creates
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libpng12.so.0.1.2.5, uses assembler code
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tuned for Intel MMX platform)
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(gcc, creates libpng12.so.0.1.2.12)
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makefile.gcmmx => Linux/ELF makefile
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(gcc, creates libpng12.so.0.1.2.12,
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uses assembler code tuned for Intel MMX platform)
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makefile.gcc => Generic makefile (gcc, creates static libpng.a)
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makefile.knr => Archaic UNIX Makefile that converts files with
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ansi2knr (Requires ansi2knr.c from
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makefile.freebsd => FreeBSD makefile
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makefile.hpgcc => HPUX makefile using gcc
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makefile.hpux => HPUX (10.20 and 11.00) makefile
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makefile.hp64 => HPUX (10.20 and 11.00) makefile, 64 bit
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makefile.ibmc => IBM C/C++ version 3.x for Win32 and OS/2 (static)
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makefile.intel => Intel C/C++ version 4.0 and later
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libpng.icc => Project file, IBM VisualAge/C++ 4.0 or later
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makefile.macosx => MACOS X Makefile
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makefile.netbsd => NetBSD/cc makefile, PNGGCCRD, makes libpng.so.
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makefile.ne0bsd => NetBSD/cc makefile, PNGGCCRD, makes libpng0.so
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makefile.ne12bsd => NetBSD/cc makefile, PNGGCCRD, makes libpng12.so
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makefile.openbsd => OpenBSD makefile
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makefile.sgi => Silicon Graphics IRIX (cc, creates static lib)
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makefile.sggcc => Silicon Graphics (gcc, creates libpng12.so.0.1.2.5)
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makefile.sggcc => Silicon Graphics
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(gcc, creates libpng12.so.0.1.2.12)
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makefile.sunos => Sun makefile
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makefile.solaris => Solaris 2.X makefile
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(gcc, creates libpng12.so.0.1.2.5)
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(gcc, creates libpng12.so.0.1.2.12)
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makefile.so9 => Solaris 9 makefile
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(gcc, creates libpng12.so.0.1.2.5)
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(gcc, creates libpng12.so.0.1.2.12)
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makefile.32sunu => Sun Ultra 32-bit makefile
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makefile.64sunu => Sun Ultra 64-bit makefile
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makefile.sco => For SCO OSr5 ELF and Unixware 7 with Native cc
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makefile.beos => BEOS makefile for X86
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makefile.bor => Borland makefile (uses bcc)
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makefile.bc32 => 32-bit Borland C++ (all modules compiled in C mode)
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makefile.bd32 => To make a png32bd.dll with Borland C++ 4.5
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makefile.tc3 => Turbo C 3.0 makefile
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makefile.dj2 => DJGPP 2 makefile
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makefile.msc => Microsoft C makefile
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makefile.vcawin32 => makefile for Microsoft Visual C++ 5.0 and
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makefile.vcawin32=> makefile for Microsoft Visual C++ 5.0 and
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later (uses assembler code tuned for Intel MMX
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makefile.vcwin32 => makefile for Microsoft Visual C++ 4.0 and
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pngos2.def => OS/2 module definition file used by makefile.os2
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makefile.watcom => Watcom 10a+ Makefile, 32-bit flat memory model
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makevms.com => VMS build script
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pngdef.pas => Defines for a png32bd.dll with Borland C++ 4.5
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SCOPTIONS.ppc => Used with smakefile.ppc
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mangle => Directory containing scripts to build libpng12m.so:
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mangle.in => Function-decoration macros added to png.h by the
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makefile.linux => Linux/ELF makefile
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(gcc, creates libpng12m.so.0.1.2.5)
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makefile.gcmmx => Linux/ELF makefile (gcc, creates
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libpng12.so.0m.1.2.5, uses assembler code
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tuned for Intel MMX platform)
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makefile.sgi => Silicon Graphics (cc, creates libpng12m.so)
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makefile.sggcc => Silicon Graphics (gcc, creates libpng12m.so)
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Good luck, and happy coding.
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-Glenn Randers-Pehrson
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Internet: randeg@alum.rpi.edu
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-Glenn Randers-Pehrson (current maintainer)
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Internet: glennrp at users.sourceforge.net
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Internet: adilger@enel.ucalgary.ca
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-Andreas Eric Dilger (former maintainer, 1996-1997)
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Internet: adilger at enel.ucalgary.ca
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Web: http://www-mddsp.enel.ucalgary.ca/People/adilger/
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-Guy Eric Schalnat (original author and former maintainer, 1995-1996)
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(formerly of Group 42, Inc)
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Internet: gschal@infinet.com
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Internet: gschal at infinet.com
added
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PNG/libpng/README
