10-13-2009
I have looked into the tr function indeed, but thought that sed could do the same thing in this case. I just have a general concern about the use of regular expressions in the tr function, since "Most of the special RE codes do not apply in the tr function. ", so recognising hex color codes could be an issue.
UPDATE: Unless of course you mean that I first need to extract the hex color code, then pipe (|) it through to the tr function?
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LEARN ABOUT DEBIAN
giftext
giftext(1) General Commands Manual giftext(1)
NAME
giftext - A program to dump (text only) general information about GIF file.
USAGE
giftext [-q] [-c] [-e] [-z] [-p] [-r] [-h] gif-file
If no gif-file is given, GifText will try to read a GIF file from stdin.
As giftext can generate huge amounts of data, ^C will kill it, but 'q' will stop only the printing (of one of -e, -z, -p), while file
integrity will still be checked.
MEMORY REQUIRED
Line.
OPTIONS
[-q]
Quiet mode. Defaults off on MSDOS, on under UNIX. Controls printout of running scan lines. Use -q- to invert.
[-c]
Dumps the color maps.
[-e]
Dumps encoded bytes - the pixels after compressed using LZ algorithm and chained to form bytes. This is the form the data is saved
in the GIF file. Dumps in hex - 2 digit per byte.
[-z]
Dumps the LZ codes of the image. Dumps in hex - 3 digits per code (as we are limited to 12 bits).
[-p]
Dumps the pixels of the image. Dumps in hex - 2 digit per pixel (<=byte).
[-r]
Dumps raw pixels as one byte per pixel. This option inhibits all other options and only the pixels are dumped. This option may be
used to convert GIF files into raw data. Note: the color map can be extracted by gifclrmp utility. If more than one image is
included in the file, all images will be dumped in order.
[-h]
Print one line of command line help, similar to Usage above.
AUTHOR
Gershon Elber
Man page created by T.Gridel <tgridel@free.fr>, originally written by Eric S. Raymond <esr@thyrsus.com>
giflib-tools giftext(1)