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-
- Here are three programs which convert between the Spectrum 512 graphics
- format for the Atari ST and the Portable Pixel Map (ppm) format used by
- Jef Poskanzer's PBMPLUS package. Also included are two programs to
- convert between PBMPLUS and Degas PI1 format for the Atari.
-
- "sputoppm.c" reads an uncompressed Spectrum file on its standard input
- and writes a ppm file to its standard output. The program does *not*
- check for a file name on the command line and will complain if it finds
- one. Be sure to send the input file to standard input.
-
- "spctoppm.c" reads a compressed Spectrum file on standard input and
- writes a ppm file to standard output. Again, placing a file name on the
- command line won't work.
-
- "ppmtospu.c" reads a ppm file on standard input and writes an
- uncompressed Spectrum file on standard output. As with the preceding
- programs, don't use a file name on the command line. There are three
- command line options:
-
- -d0 turns off dithering.
- -d2 uses a 2x2 ordered dither. This is the default.
- -d4 uses a 4x4 ordered dither.
-
- Using a different dithering option may increase the image quality on
- difficult images.
-
- "pi1toppm.c" reads a Degas PI1 (low-resolution) image on standard input
- and writes a ppm file on standard output.
-
- "ppmtopi1.c" reads a ppm image on standard input and writes a Degas PI1
- file on standard output. It will complain if the input file has more
- than 16 colors.
-
-
- These programs were originally developed on an Amiga. I've since
- compiled them on VAX, Sun, Silicon Graphics, and Multiflow machines
- with no problems.
-
- I wish to convey my appreciation to Scott Yelich (scott@xanth.cs.odu.edu)
- for beta-testing these programs.
-
- These programs are Copyright (C) 1990, Steve Belczyk.
-
- Permission to use, copy, modify and distribute this software for any
- purpose and without fee is hereby granted, provided that the above
- copyright notice appear in all copies and supporting documentation.
- This software is provided "as is" without express or implied warranty.
-
- Please send bug reports to one of the following addresses:
-
- Steve Belczyk CIS: 75126,515 BBS: +1 508 664-0149 (2400 bps)
- seb3@gte.com GEnie: sbelczyk UUCP: {harvard,vaxine}!bunny!seb3
-
-