Short: V4.2 JPEG (en/de)coder for Retina owners Type: gfx/show Architecture: m68k-amigaos Version 4.2 of JPEG - coder/decoder/viewer adapted for the Retina Gfx-Board ------------------------------------------------------------ (changes at the end of this file) If you don't own a Retina graphics board, this may just be a jpeg encoder/decoder for you. Though RetinaDisplay is already able to display JPEG pictures, here's a better alternative. Included are two executables: cjpeg does JPEG-compression, just type cjpeg -h for a short syntax summary. This program has just been adapted by me to use the multipic.library to read various picture formats djpeg does JPEG-decompression, and to this one I added the watch-directly-on-Retina feature, it's enabled by default. You may also try djpeg -h here. Both programs are compiled from the official "fourth public release of the Independent JPEG Group's free JPEG software". Only djpeg has been modified by me. Why use djpeg instead of RetinaDisplay? - djpeg is faster, it's even faster than most commercial jpeg-loaders available. - djpeg lets you watch the picture while it's decoded - djpeg supports more jpeg-derivatives - djpeg supports 8-bit as well as 24-bit display on the retina board. Watching JPEGs with the -greyscale switch given is even faster. - djpeg is able to do "color-quantization", that is, if you enable that feature by "-color 256", an 8-bit screen will be opened on the Retina, giving you the ability to watch even larger pictures than it may be possible in 24-bits. REQUIREMENTS: You NEED to have IXEmul.library available, this library is part of Markus Wild's GNU C (2.3.3) port for the amiga. It's available from several ftp-servers. NOTES: djpeg spits its output to standard I/O, unless you specify anything else with a redirection ("djpeg -targa bla.jpg >bla.targa") press CTRL-C when djpeg is finished to close the screen. I compiled a >=68020 and 68881 version, too, but there were no measurable speed-difference. If anyone wants the source-code, he'd contact me via email, my adress is lkv@mania.robin.de The original JPEG V4 source is available from several ftp-servers. Just enjoy it, Lutz Vieweg CHANGES: 4.2 - oh no, sorry... the archive with 4.1 included the old 4.0 executables... - for consistency, CTRL-C is now used to abort djpeg in any case. 4.1 - now you can always stop djpeg with CTRL-C while decoding... - cjpeg changed: it uses now the multipic.library (supplied with the Retina Software 1.3 and up) to load the original picture, therefore any format supported by this library may be packed! - cjpeg now uses infile outfile syntax djpeg still writes on stdout by default. - cjpeg progess display enabled