RLETOABA62(1) 1 (6 February 1988) RLETOABA62(1)
NAME
rletoabA62 - Convert from RLE Format to Abekas A62 Dump
Format
SYNOPSIS
rletoabA62 [ -N ] [ -f n ] [ -n n ] [ infile ]
DESCRIPTION
RletoabA62 converts a raster file in the Utah Raster Toolkit
RLE format into a format suitable for writing to an Abekas
A62 dump tape and subsequent loading onto the Abekas disk.
The generated image is 768 pixels wide and 512 pixels high.
If the input is larger, it is truncated. If it is smaller,
it is padded on the top and right with black. The output is
written to stdout, and should be written to a tape in 24K
byte blocks with dd as in the following:
dd of=/dev/rmt8 obs=24k
Normally, the output is processed with a simple digital
filter; this feature may be turned off with an option.
RletoabA62 normally writes two consecutive frames, normally
starting at frame 1.
Input is taken from stdin unless a file name is given on the
command line. Only a single file may be given, and so if
multiple invocations of rletoabA62 are performed in a
script, care must be taken to tell the program to convert
the data for the proper Abekas frame number (1-4).
Otherwise, the colors will appear wrong; they will be
rotated on a vector scope diagram.
EXAMPLE
The following example converts all files ending in .rle in
the current directory and writes them to a tape. Two frames
are written per image and the frame number is incremented
accordingly.
frame=1
number=2
for file in *.rle
do
rletoabA62-f $frame $file
frame=`expr \( \( $frame - 1 \) + $number \)
% 4 + 1`
done |
dd of=/dev/rmt8 obs=24k
OPTIONS
Options are parsed by getopt(3).
-N Do not apply digital filtering.
Page 1 (printed 12/1/98)
RLETOABA62(1) 1 (6 February 1988) RLETOABA62(1)-f n Create the first frame as Abekas frame number n, having
a value from one to four. Consecutive frames increment
this number modulo four. The default is one.
-n n Write n frames of output, incrementing the frame number
each time. The default is two.
SEE ALSO
urt(1), RLE(5).
AUTHOR
Bob Brown, RIACS.
BUGS
This program does not preserve the aspect ratio of the
input.
Page 2 (printed 12/1/98)
