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targatorle - Convert Truevision TARGA images to RLE format.
targatorle
[ -h headerfile ] [ -n nchannels ] [ -o outfile.rle ] [ infile.tga ]
Targatorle
converts a file from Truevision's TARGA format into RLE format. If no input
file is specified, the data is read from stdin. Targatorle recognizes (but
cannot necessarily process) all of the image subtypes defined by the 1989
TARGA 2.0 specification:
0 - Header Only, No Image Data
1 - Uncompressed, Color-mapped Image
2 - Uncompressed, True-color Image
3 - Uncompressed, B/W (gray scale) Image
9 - Run-length encoded, Color-mapped Image
10 - Run-length encoded, True-color Image
11 - Run-length encoded, B/W Image
Targatorle should correctly process images in formats 0, 2, 3, 10, and
11. No support is currently available for color mapped images.
- -h
- Allow
the program to write TARGA header information to headerfile
- -n
- where nchannels
is 3 or 4. If input is a color image, copy only nchannels of the TARGA file;
this allows the alpha channel to be stripped. By default, the alpha channel
will be copied if present.
- -o
- Use outfile as output instead of stdout.
The
TARGA image descriptor byte is ignored; therefore, the image origin is
assumed to be that of RLE(5)
(bottom left). None of the color-mapped TARGA
formats (types 1 and 9) are supported. Finally, no attempt has been made
to support extensions to the TARGA File Format introduced by Truevision
in 1989 (new support for time stamps, comments, user-defined data fields,
etc.).
urt(1)
, RLE(5)
.
Hann-Bin Chuang
Andrew C. Hadenfeldt, Univ. of Nebraska-Lincoln (modifications)
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