-README for libpng version 1.2.6 - August 15, 2004 (shared library 12.0)
+README for libpng version 1.5.7 - December 15, 2011 (shared library 15.0)
See the note about version numbers near the top of png.h
See INSTALL for instructions on how to install libpng.
-Libpng comes in several distribution formats. Get libpng-*.tar.gz
-or libpng-*.tar.bz2 if you want UNIX-style line endings in the text
-files, or lpng*.zip if you want DOS-style line endings.
+Libpng comes in several distribution formats. Get libpng-*.tar.gz,
+libpng-*.tar.xz or libpng-*.tar.bz2 if you want UNIX-style line endings
+in the text files, or lpng*.zip if you want DOS-style line endings.
Version 0.89 was the first official release of libpng. Don't let the
fact that it's the first release fool you. The libpng library has been in
critical or an ancillary chunk.
The changes made to the library, and bugs fixed are based on discussions
-on the PNG implementation mailing list <png-implement@ccrc.wustl.edu>
-and not on material submitted privately to Guy, Andreas, or Glenn. They will
-forward any good suggestions to the list.
+on the PNG-implement mailing list and not on material submitted
+privately to Guy, Andreas, or Glenn. They will forward any good
+suggestions to the list.
-For a detailed description on using libpng, read libpng.txt. For
+For a detailed description on using libpng, read libpng-manual.txt. For
examples of libpng in a program, see example.c and pngtest.c. For usage
information and restrictions (what little they are) on libpng, see
png.h. For a description on using zlib (the compression library used by
You can use zlib as a drop-in replacement for fread() and fwrite() if
you are so inclined.
-zlib should be available at the same place that libpng is.
-If not, it should be at ftp.uu.net in /graphics/png
-Eventually, it will be at ftp.uu.net in /pub/archiving/zip/zlib
+zlib should be available at the same place that libpng is, or at.
+ftp://ftp.info-zip.org/pub/infozip/zlib
You may also want a copy of the PNG specification. It is available
-as an RFC and a W3C Recommendation. Failing
-these resources you can try ftp.uu.net in the /graphics/png directory.
+as an RFC, a W3C Recommendation, and an ISO/IEC Standard. You can find
+these at http://www.libpng.org/pub/png/documents/
-This code is currently being archived at ftp.uu.net in the
-/graphics/png directory, and on CompuServe, Lib 20 (PNG SUPPORT)
+This code is currently being archived at libpng.sf.net in the
+[DOWNLOAD] area, and on CompuServe, Lib 20 (PNG SUPPORT)
at GO GRAPHSUP. If you can't find it in any of those places,
e-mail me, and I'll help you find it.
fix. Please mention "libpng" somewhere in the subject line. Thanks.
This release was created and will be supported by myself (of course
-based in a large way on Guy's and Andreas' earlier work), and the PNG group.
+based in a large way on Guy's and Andreas' earlier work), and the PNG
+development group.
-glennrp@users.sourceforge.net
-png-implement@ccrc.wustl.edu
+Send comments/corrections/commendations to png-mng-implement at
+lists.sourceforge.net (subscription required; visit
+https://lists.sourceforge.net/lists/listinfo/png-mng-implement
+to subscribe) or to glennrp at users.sourceforge.net
You can't reach Guy, the original libpng author, at the addresses
-given in previous versions of this document. He and Andreas will read mail
-addressed to the png-implement list, however.
+given in previous versions of this document. He and Andreas will
+read mail addressed to the png-implement list, however.
Please do not send general questions about PNG. Send them to
-the address in the specification (png-group@w3.org). At the same
-time, please do not send libpng questions to that address, send them to me
-or to png-implement@ccrc.wustl.edu. I'll
-get them in the end anyway. If you have a question about something
+png-mng-misc at lists.sf.net (subscription required; visit
+https://lists.sourceforge.net/lists/listinfo/png-mng-misc to
+subscribe). If you have a question about something
in the PNG specification that is related to using libpng, send it
to me. Send me any questions that start with "I was using libpng,
and ...". If in doubt, send questions to me. I'll bounce them
to others, if necessary.
Please do not send suggestions on how to change PNG. We have
-been discussing PNG for three years now, and it is official and
+been discussing PNG for sixteen years now, and it is official and
finished. If you have suggestions for libpng, however, I'll
-gladly listen. Even if your suggestion is not used for version
-1.0, it may be used later.
+gladly listen. Even if your suggestion is not used immediately,
+it may be used later.
Files in this distribution:
TODO => Things not implemented in the current library
Y2KINFO => Statement of Y2K compliance
example.c => Example code for using libpng functions
- libpng.3 => manual page for libpng (includes libpng.txt)
- libpng.txt => Description of libpng and its functions
+ libpng.3 => manual page for libpng (includes libpng-manual.txt)
+ libpng-manual.txt => Description of libpng and its functions
libpngpf.3 => manual page for libpng's private functions
png.5 => manual page for the PNG format
png.c => Basic interface functions common to library
- png.h => Library function and interface declarations
- pngconf.h => System specific library configuration
- pngasmrd.h => Header file for assembler-coded functions
+ png.h => Library function and interface declarations (public)
+ pngpriv.h => Library function and interface declarations (private)
+ pngconf.h => System specific library configuration (public)
+ pngstruct.h => png_struct declaration (private)
+ pnginfo.h => png_info struct declaration (private)
+ pngdebug.h => debugging macros (private)
pngerror.c => Error/warning message I/O functions
pngget.c => Functions for retrieving info from struct
pngmem.c => Memory handling functions
pngminus => Simple pnm2png and png2pnm programs
pngsuite => Test images
visupng => Contains a MSVC workspace for VisualPng
- projects => Contains project files and workspaces for building DLL
- beos => Contains a Beos workspace for building libpng
- borland => Contains a Borland workspace for building libpng
- and zlib
- msvc => Contains a Microsoft Visual C++ (MSVC) workspace
- for building libpng and zlib
- netware.txt => Contains instructions for downloading a set of
- project files for building libpng and zlib on
- Netware.
- wince.txt => Contains instructions for downloading a Microsoft
- Visual C++ (Windows CD Toolkit) workspace for
- building libpng and zlib on WindowsCE
+ projects => Contains project files and workspaces for
+ building a DLL
+ cbuilder5 => Contains a Borland workspace for building
+ libpng and zlib
+ visualc6 => Contains a Microsoft Visual C++ (MSVC)
+ workspace for building libpng and zlib
+ visualc71 => Contains a Microsoft Visual C++ (MSVC)
+ workspace for building libpng and zlib
+ xcode => Contains an Apple xcode
+ workspace for building libpng and zlib
scripts => Directory containing scripts for building libpng:
- descrip.mms => VMS makefile for MMS or MMK
- makefile.std => Generic UNIX makefile (cc, creates static libpng.a)
- makefile.linux => Linux/ELF makefile
- (gcc, creates libpng12.so.0.1.2.5)
- makefile.gcmmx => Linux/ELF makefile (gcc, creates
- libpng12.so.0.1.2.5, uses assembler code
- tuned for Intel MMX platform)
- makefile.gcc => Generic makefile (gcc, creates static libpng.a)
- makefile.knr => Archaic UNIX Makefile that converts files with
- ansi2knr (Requires ansi2knr.c from
- ftp://ftp.cs.wisc.edu/ghost)
- makefile.aix => AIX makefile
- makefile.cygwin => Cygwin/gcc makefile
- makefile.darwin => Darwin makefile
- makefile.dec => DEC Alpha UNIX makefile
- makefile.freebsd => FreeBSD makefile
- makefile.hpgcc => HPUX makefile using gcc
- makefile.hpux => HPUX (10.20 and 11.00) makefile
- makefile.ibmc => IBM C/C++ version 3.x for Win32 and OS/2 (static)
- makefile.intel => Intel C/C++ version 4.0 and later
- libpng.icc => Project file, IBM VisualAge/C++ 4.0 or later
- makefile.macosx => MACOS X Makefile
- makefile.netbsd => NetBSD/cc makefile, PNGGCCRD, makes libpng.so.
- makefile.ne0bsd => NetBSD/cc makefile, PNGGCCRD, makes libpng0.so
- makefile.openbsd => OpenBSD makefile
- makefile.sgi => Silicon Graphics IRIX (cc, creates static lib)
- makefile.sggcc => Silicon Graphics (gcc, creates libpng12.so.0.1.2.5)
- makefile.sunos => Sun makefile
- makefile.solaris => Solaris 2.X makefile
- (gcc, creates libpng12.so.0.1.2.5)
- makefile.so9 => Solaris 9 makefile
- (gcc, creates libpng12.so.0.1.2.5)
- makefile.32sunu => Sun Ultra 32-bit makefile
- makefile.64sunu => Sun Ultra 64-bit makefile
- makefile.sco => For SCO OSr5 ELF and Unixware 7 with Native cc
- makefile.mips => MIPS makefile
- makefile.acorn => Acorn makefile
- makefile.amiga => Amiga makefile
- smakefile.ppc => AMIGA smakefile for SAS C V6.58/7.00 PPC
- compiler (Requires SCOPTIONS, copied from
- scripts/SCOPTIONS.ppc)
- makefile.atari => Atari makefile
- makefile.beos => BEOS makefile for X86
- makefile.bor => Borland makefile (uses bcc)
- makefile.bc32 => 32-bit Borland C++ (all modules compiled in C mode)
- makefile.bd32 => To make a png32bd.dll with Borland C++ 4.5
- makefile.tc3 => Turbo C 3.0 makefile
- makefile.dj2 => DJGPP 2 makefile
- makefile.msc => Microsoft C makefile
- makefile.vcawin32 => makefile for Microsoft Visual C++ 5.0 and
- later (uses assembler code tuned for Intel MMX
- platform)
- makefile.vcwin32 => makefile for Microsoft Visual C++ 4.0 and
- later (does not use assembler code)
- makefile.os2 => OS/2 Makefile (gcc and emx, requires pngos2.def)
- pngos2.def => OS/2 module definition file used by makefile.os2
- makefile.watcom => Watcom 10a+ Makefile, 32-bit flat memory model
- makevms.com => VMS build script
- pngdef.pas => Defines for a png32bd.dll with Borland C++ 4.5
- SCOPTIONS.ppc => Used with smakefile.ppc
- mangle => Directory containing scripts to build libpng12m.so:
- mangle.in => Function-decoration macros added to png.h by the
- makefiles.
- makefile.linux => Linux/ELF makefile
- (gcc, creates libpng12m.so.0.1.2.5)
- makefile.gcmmx => Linux/ELF makefile (gcc, creates
- libpng12.so.0m.1.2.5, uses assembler code
- tuned for Intel MMX platform)
- makefile.sgi => Silicon Graphics (cc, creates libpng12m.so)
- makefile.sggcc => Silicon Graphics (gcc, creates libpng12m.so)
+ (see scripts/README.txt for the list of scripts)
Good luck, and happy coding.
--Glenn Randers-Pehrson
- Internet: randeg@alum.rpi.edu
+-Glenn Randers-Pehrson (current maintainer, since 1998)
+ Internet: glennrp at users.sourceforge.net
--Andreas Eric Dilger
- Internet: adilger@enel.ucalgary.ca
+-Andreas Eric Dilger (former maintainer, 1996-1997)
+ Internet: adilger at enel.ucalgary.ca
Web: http://www-mddsp.enel.ucalgary.ca/People/adilger/
--Guy Eric Schalnat
+-Guy Eric Schalnat (original author and former maintainer, 1995-1996)
(formerly of Group 42, Inc)
- Internet: gschal@infinet.com
+ Internet: gschal at infinet.com
projects / wxWidgets.git / blobdiff