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1994-09-21
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TAPGIF 1.0 21.09.94
ABOUT
TAPGIF is a program that converts an ILBM picture to GIF format
without changing the picture's palette information. This is for
direct conversions, and does not handle HAM, EHB, or the other
variations from the norm correctly.
I use it specifically for converting 640x480/8 AGA pics with
Windows identity palettes to GIF format without disturbing the
palette. There is a program called AM2GIF that will do HAM and so
on, but does not support AGA. And unfortunately ImageMaster and
PPM, which can both write GIFs, also both insist on fooling with
the palette in the process.
If the IFF picture contains an ANNO chunk, then the GIF file will
be written with a GIF89a signature and a comment extension block
will be added containing the annotation. This can be prevented by
specifying an empty NOTE string on the command line.
TAPGIF is written by John Bickers using SAS C 6.51.
REQUIREMENTS
TAPGIF requires a machine with KS 2.0, and also requires the IFF
library. This library can be found on the Aminet sites.
PARAMETERS
The command template is...
FROM/A,TO/A,NOTE/K
where...
FROM Is the name of an IFF ILBM picture to convert.
TO Is the name of the GIF picture you want created.
NOTE An optional comment to be added to the GIF file. This
will cancel any ANNO chunk that may be in the IFF
file, and the file will be written with a GIF89a
signature.
CREDITS
TAPGIF is written by John Bickers using SAS C 6.51.
GIF compression is performed by a modified version of the LZW code
in Jef Poskanzer's PPMTOGIF program, which in turn is based on the
LZW code in the Unix compress program.
Christian A. Weber's iff.library is used for loading ILBM files.
DISTRIBUTION
TAPGIF is Copyright © 1994 by John Bickers.
This program is freely distributable.
CONTACT INFO
I can be reached at:
John Bickers
214 Rata St
Naenae 6301
New Zealand
Or: jbickers@templar.actrix.gen.nz
HISTORY
20.09.94 1.0