RLETORLA(1) 1 (May 30, 1990) RLETORLA(1)
NAME
rletorla - convert a Utah RLE image file into a Wavefront
"rla" or "rlb" image file.
SYNOPSIS
rletorla [ -b ] [ -h ] [ -v ] [ -o outfile ] [ infile ]
DESCRIPTION
This program converts Utah RLE(5) image files into Wavefront
"rla" or "rlb" image files. Rletorla will handle four types
of RLE files: Grayscale (8 bit data, no color map),
Pseudocolor (8 bit data with a color map), Truecolor (24 bit
data with color map), and Directcolor (24 bit data, no color
map). In each case the resulting Wavefront image file will
contain RGB data as well as a matte channel. If no alpha
channel is found in the RLE file, the Wavefront matte
channel will be computed using the RGB or mapped data. The
entire area of the Wavefront image will be run length
encoded. The size of the Wavefront "bounding box" data
structure will be set to that of the total image area.
NOTE: Even though images of any size can be converted,
Wavefront is very fussy about image dimensions. Normally,
the converted image must be one of the following sizes or
Wavefront will complain with "ERROR, cannot open image file
filename, error -8":
646x485 (0-645x0-484) ntsc_4d
720x486 (0-719x0-485) qtl_ntsc
636x484 (0-635x0-483) iris_ntsc
1024x1024 (0-1023x0-1023) 1k_square
To get around this problem, the aspect ratio field in the
Wavefront "rla" file will be "faked" with "ntsc_4d" for all
formats that do not match one of those shown above. This
way, Wavefront will find a valid format string, and any
image size will be readable. "rlb" image file do not have
this limitation.
OPTIONS
-b This option will cause rletorla to create a Wavefront
"rlb" image file instead of using the default "rla"
conversion.
-v This option will cause rletorla to operate in verbose
mode. Header information is printed to "stderr".
-h This option allows the header of the RLE file to be
dumped to "stderr" without converting the file. It is
equivalent to using the -v option except that no file
conversion takes place.
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RLETORLA(1) 1 (May 30, 1990) RLETORLA(1)-o outfile
This option allows the name of the output file to be
specified. Re-directing standard output as is done
with most all other toolkit utilities is not permitted
here because the resulting "rla" or "rlb" file is not
written sequentially.
infile
The name of the RLE image data file to be converted.
The name of the resulting Wavefront file will be
derived from the name of the input file (unless the -o
option is used) -- the extension will be changed from
"rle" to "rla" or "rlb". (Note: if you use the
extended input file names described in urt(1), this
will result in a very strange filename for the
Wavefront file.)
EXAMPLES
rletorla-v lenna.rle
While running in verbose mode, convert lenna.rle to
Wavefront rla format and store resulting data in
lenna.rla.
rletorla-h test.0001.rle
Dump the header information of the RLE file called
test.0001.rle.
rletorla-b -o junk.rlb test.rle
Convert test.rle into a Wavefront "rlb" file called
junk.rlb.
SEE ALSO
rlatorle(1), urt(1), RLE(5).
AUTHOR
Wesley C. Barris
Army High Performance Computing Research Center (AHPCRC)
Minnesota Supercomputer Center, Inc.
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