Palm Pilot ImageViewer CLI tools. These might be of historic interest to someone. Or not.
These programs are GPL'ed, see COPYING for license details.
The PDB header record was figured out/compiled by Theodore Ts'o tytso@mit.edu (the PDB header is the same as the PRC application header), the layout of the Image Viewer image header was figured out by Eric.Arnold@sun.com (I kinda' stole the format from his ppmtoIVpdb program which was posted to the pilot-unix mailing list). I figured out the compression format, notes, and monochrome format and wrapped it all together as ipdb*.c. The programs are pretty thin wrappers around ipdb*.c.
Support for depth 4 grayscale (i.e. 16 shades of gray) images was graciously supplied by Munechika SUMIKAWA sumikawa@ebina.hitachi.co.jp. I think you need a Palm IIIx or better to view such images.
This package was developed on i486-unknown-linux but I have tested the code on a SPARC-10, HP-PA, and DEC Alpha to check for byte order and type size problems. All the code is pretty strict ANSI so I don't expect any difficulties on any modern unixen (YMMV anywhere else). I think the new autoconf hackery should take care of various endian issues; however, I've left the run-time endian checks in the code as a backup option. I'm also assuming the following sizes:
unsigned char == 1 byte
unsigned short == 2 bytes
unsigned int == 4 bytes
These are not guaranteed to work but they do work on all the systems that I care about, see "mine/slop.h" if you need to fiddle with these.
Notes on the Image Viewer pdb format can be found in ipdb*.[ch].
Two and four bit palettes for the GIMP can be found in Pilot and Pilot16.
I don't really have any use for the Pilot Image Viewer program, I just did this out of curiosity (and because I find GUI only converters a little silly). These programs have no connection with the Image Viewer author so don't send problem reports to him (unless it is a bug in Image Viewer).
Don't blame me if any of the converted images crash your pilot, if one does and you find out why, let me know so I can fix the tools (or just send me a patch).
If you're looking for a nagless image viewer for your Pilot, check out Tiny Viewer (http://www.righto.com/pilot/tv.html).
Eric Howe
mu@trends.net
http://www.trends.net/~mu