• ANNOUNCE: DJGPP port of library PNG 1.6.39 uploaded.

    From [via djgpp-announce@delorie.com]" <@21:1/5 to All on Fri Dec 30 00:44:26 2022
    This is a port of library PNG 1.6.39 to MSDOS/DJGPP.

    DJGPP specific changes.

    As for all binaries and libraries that handle images of any kind, it should
    be noted that files (streams) are *ALWAYS* openend in binary mode with all
    the well known implications on a DOS of WINDOWS OS if the stream comes from
    STDIN and/or STDOUT when these are still connected to the console.
    For the DJGPP port, the "SIGINT" and "SIGQUIT" signals are reenabled when
    the stream is connected to a TTY.
    Apart from this change only the usual files needed for configuration with
    djgpp have been added. That files are stored in the /djgpp directory.
    To configure, compile and use the package you will have to install the zlib
    port available at ftp.delorie.com and mirrors as:
    Of course, you can download a newer version of zlib if available.

    To compile the source code LFN support is required. I have build it on
    WinXP and Win98SE but I have never tried to build it on any other OS.

    As usual, all djgpp specific files (diffs, README files, etc.) are stored in
    the /djgpp directory. The sources have been configured to be build in the
    "0build" directory. If for some reason it does not work for you, delete its
    contents and configure from scratch again running the command:
    ..\djgpp\config.bat ../.

    For further information about library PNG please read the info docs and NEWS file.

    Here is an extract of the ANNOUNCE file showing the user visible changes
    from the last port (library PNG 1.6.37) to this one:


    Changes from version 1.6.38 to version 1.6.39 ---------------------------------------------

    * Changed the error handler of oversized chunks (i.e. larger than
    PNG_USER_CHUNK_MALLOC_MAX) from png_chunk_error to png_benign_error.
    * Fixed a buffer overflow error in contrib/tools/pngfix.
    * Fixed a memory leak (CVE-2019-6129) in contrib/tools/pngcp.
    * Disabled the ARM Neon optimizations by default in the CMake file,
    following the default behavior of the configure script.
    * Allowed configure.ac to work with the trunk version of autoconf.
    * Removed the support for "install" targets from the legacy makefiles;
    removed the obsolete makefile.cegcc.
    * Cleaned up the code and updated the internal documentation.

    Changes from version 1.6.37 to version 1.6.38 ----------------------------------------------------------

    * Added configurations and scripts for continuous integration.
    * Fixed various errors in the handling of tRNS, hIST and eXIf.
    * Implemented many stability improvements across all platforms.
    * Updated the internal documentation.


    The port consists of the usual two packages that have been produced using
    djdev20X (CVS repository code) and can be downloaded from ftp.delorie.com
    and mirrors as (time stamp 2022-12-28):

    library PNG 1.6.39 scripts, headers, libs and man format documentation:

    library PNG 1.6.39 source:

    Send library PNG specific bug reports to
    Send suggestions and bug reports concerning the DJGPP port to
    comp.os.msdos.djgpp or <djgpp@delorie.com>.


    Guerrero, Juan Manuel <juan.guerrero@gmx.de>

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