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1995-09-05
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The Independent JPEG Group's JPEG software
==========================================
README for release 6 of 2-Aug-95
================================
This distribution contains the sixth public release of the Independent JPEG
Group's free JPEG software. See the file README for legal issues.
This software is the work of Tom Lane, Philip Gladstone, Luis Ortiz, Jim
Boucher, Lee Crocker, Julian Minguillon, George Phillips, Davide Rossi,
Ge' Weijers, and other members of the Independent JPEG Group.
IJG is not affiliated with the official ISO JPEG standards committee.
This port for the Amiga is done by Günther Röhrich.
I used the original jpegsrc.v6.tar.gz archive ftp'ed directly from ftp.uu.net
for compiling the programs.
System requirements:
- OS 2.0 or higher
- programs with the ending .020881 need a 68020/68881 (or better)
- JPEGTMP: must be assigned to a directory with enough free disk space
- a stack size of 4000 bytes should be enough
- ixemul.library is NOT needed
********************
NEW IN THIS RELEASE:
********************
- progressive JPEG files are supported
- new program: jpegtran, for lossless transcoding between different JPEG
formats
- compiled with gcc 2.7.0 and libnix 1.0, switches: -O3 -fbaserel
- all programs should be a bit faster because of that
- see change.log for more information
******************
NEW IN RELEASE 5b:
******************
The ixemul.library is not needed any more. Starting with this release cjpeg
and djpeg are using the Unix-like command line style. Redirection and piping
is now fully supported. Examples:
cjpeg inputfile >outputfile
cjpeg <inputfile >outputfile
djpeg -scale 1/4 inputfile | cjpeg >outputfile
The last example creates a 1/4 scaled JPEG file of your inputfile. Note
that a temporary ppm file will not be created. To use this with the
standard Amiga shell you need one of those pipe archives:
Aminet: util/shell/MJPipe09.lha
util/shell/Pipe_1_5.lha
util/cli/pipe3310.lha
Use the -outfile option if you don't want to use redirection. New shell
scripts for the jpegAGA program are also included in this release. They are
now working with all versions of djpeg and not just with those using the "two-
file" command line style.
If you found a bug then please let me know about it. (Every behaviour that
does not correspond to the original documentation is considered a bug.)
If it is not Amiga-specific you may also report it directly to the
Independent JPEG Group.
My address:
electronic mail: normal mail:
**************** ************
Guenther@studbox.uni-stuttgart.de Günther Röhrich
Lerchenbergstr. 4
73733 Esslingen
Germany
You may also visit my personal WWW home page at:
http://rpool1.rus.uni-stuttgart.de/~zc0r1121/