-README for libpng 1.0.3 - January 14, 1999 (shared library 2.1)
+README for libpng version 1.2.6 - August 15, 2004 (shared library 12.0)
See the note about version numbers near the top of png.h
See INSTALL for instructions on how to install libpng.
-This is 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
-extensive use and testing for about two and a half years. However, it's
-finally gotten to the stage where there haven't been significant
+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.
+
+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
+extensive use and testing since mid-1995. By late 1997 it had
+finally gotten to the stage where there hadn't been significant
changes to the API in some time, and people have a bad feeling about
-libraries with versions < 1.0.
+libraries with versions < 1.0. Version 1.0.0 was released in
+March 1998.
****
Note that some of the changes to the png_info structure render this
It is important to note that the APIs do not make current programs
that access the info struct directly incompatible with the new
library. However, it is strongly suggested that new programs use
-the new APIs (as shown in example.c), and older programs be converted
-to the new format, to facilitate upgrades in the future.
+the new APIs (as shown in example.c and pngtest.c), and older programs
+be converted to the new format, to facilitate upgrades in the future.
****
Additions since 0.90 include the ability to compile libpng as a
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@dworking.wustl.edu>
-and not on material submitted to Guy.
+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.
For a detailed description on using libpng, read libpng.txt. For
examples of libpng in a program, see example.c and pngtest.c. For usage
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.
-randeg@alumni.rpi.edu
-png-implement@dworkin.wustl.edu
+glennrp@users.sourceforge.net
+png-implement@ccrc.wustl.edu
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
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@dworkin.wustl.edu. I'll
+or to png-implement@ccrc.wustl.edu. I'll
get them in the end anyway. 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,
Files in this distribution:
+ ANNOUNCE => Announcement of this version, with recent changes
CHANGES => Description of changes between libpng versions
+ KNOWNBUG => List of known bugs and deficiencies
+ LICENSE => License to use and redistribute libpng
README => This file
TODO => Things not implemented in the current library
- ansi2knr.1 => Manual page for ansi2knr
- ansi2knr.c => Converts files to K&R style function declarations
- build.bat => MS-DOS batch file for Borland compiler
- descrip.mms => VMS project file
+ Y2KINFO => Statement of Y2K compliance
example.c => Example code for using libpng functions
- libpng.3 => manual page for libpng
+ libpng.3 => manual page for libpng (includes libpng.txt)
libpng.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
pngerror.c => Error/warning message I/O functions
pngget.c => Functions for retrieving info from struct
pngmem.c => Memory handling functions
+ pngbar.png => PNG logo, 88x31
+ pngnow.png => PNG logo, 98x31
pngpread.c => Progressive reading functions
pngread.c => Read data/helper high-level functions
pngrio.c => Lowest-level data read I/O functions
pngwrite.c => High-level write functions
pngwtran.c => Write data transformations
pngwutil.c => Write utility functions
+ contrib => Contributions
+ gregbook => source code for PNG reading and writing, from
+ Greg Roelofs' "PNG: The Definitive Guide",
+ O'Reilly, 1999
+ msvctest => Builds and runs pngtest using a MSVC workspace
+ 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
scripts => Directory containing scripts for building libpng:
- descrip.mms => VMS makefile for MMS or MMK
- makefile.std => Generic UNIX makefile
- makefile.knr => Archaic UNIX Makefile that converts files with ansi2knr
- makefile.dec => DEC Alpha UNIX makefile
- makefile.hux => HPUX (10.20 and 11.00) makefile
- makefile.sgi => Silicon Graphics IRIX makefile
- makefile.sun => Sun makefile
- makefile.s2x => Solaris 2.X makefile (gcc, creates libpng.so.2.1.0)
- makefile.lnx => Linux/ELF makefile (gcc, creates libpng.so.2.1.0)
- makefile.mip => MIPS makefile
- makefile.aco => Acorn makefile
- makefile.ama => Amiga makefile
- smakefile.ppc => AMIGA smakefile for SAS C V6.58/7.00 PPC compiler
- (Requires SCOPTIONS, copied from scripts/SCOPTIONS.ppc)
- makefile.atr => Atari makefile
- makefile.bor => Borland makefile
- build.bat => MS-DOS batch file for Borland compiler
- makefile.dj2 => DJGPP 2 makefile
- makefile.msc => Microsoft C makefile
- makefile.w32 => makefile for Microsoft Visual C++ 4.0 and later
- makefile.tc3 => Turbo C 3.0 makefile
- makefile.os2 => OS/2 Makefile (gcc and emx, requires pngos2.def)
- makefile.wat => Watcom 10a+ Makefile, 32-bit flat memory model
- pngos2.def => OS/2 module definition file used by makefile.os2
- makevms.com => VMS build script
- pngdll.mak => To make a png32bd.dll with Borland C++ 4.5
- pngdef.pas => Defines for a png32bd.dll with Borland C++ 4.5
+ 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)
Good luck, and happy coding.
-Glenn Randers-Pehrson
- Internet: randeg@alumni.rpi.edu
- Web: http://www.rpi.edu/~randeg/index.html
+ Internet: randeg@alum.rpi.edu
-Andreas Eric Dilger
Internet: adilger@enel.ucalgary.ca
projects / wxWidgets.git / blobdiff