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FB-RLE(1)			    BRL-CAD			     FB-RLE(1)

NAME
       fb-rle -	save frame buffer image	in a run-length	encoded	file

SYNOPSIS
       fb-rle [-cd] [-F	framebuffer] [-C r/g/b]	[-S squarescrsize]
	      [-W scr_width] [-N scr_height] [-X scr_xoff] [-Y scr_yoff]
	      [-s squarefilesize] [-w file_width] [-n file_height] [file.rle]

DESCRIPTION
       fb-rle saves an image from a frame buffer in the	University of Utah
       standard	(Edition-3, or "Utah Raster Toolkit") Run-Length Encoded (RLE)
       format file (these files	can be displayed with rle-fb(1)	or a similar
       program). If file.rle is	not specified, standard	output is written.

       The size	of the image to	be saved can be	set with the -s	or -n and -w
       command line options. If	these are omitted, the entire screen area will
       be saved. The image rectangle to	be saved can be	repositioned on	the
       screen with the -X and -Y command line options.

       -W scr_width
	   specifies the desired width of the screen, in pixels.

       -N scr_height
	   specifies the desired height	of the screen, in scanlines.

       -S squarescrsize
	   sets	the screen width and height to the indicated value.

       -F framebuffer
	   This	option specifies which framebuffer the image is	to be saved
	   from. If not	given, the environment variable	FB_FILE	is used	to
	   select the display device (see brlcad(1)). If FB_FILE has not been
	   set,	the default device for your system will	be used.

       -w file_width
	   specifies the desired width of the saved image, in pixels.

       -n file_height
	   specifies the desired height	of the saved image, in scanlines.

       -s squarefilesize
	   sets	the saved image	width and height to the	indicated value.

       -c
	   The "crunch colormap" option. If the	frame buffer contains a	non
	   standard (i.e. non linear) colormap,	rather than saving that
	   colormap in the RLE file this option	causes the colormap to be
	   applied to the pixel	data before it is saved	in the file. This can
	   be useful to	preserve dramatic images created with weird color maps
	   such	that Gamma correction (e.g., for film) can also	be applied.
	   This	option is recommended when producing images for	export to
	   other display systems, so that variations in	the interpretation of
	   color maps between different	types of display hardware do not
	   affect the displayed	image.

       -d
	   Debug option, provides a verbose description	of the input file
	   structure and image decoding	process, written on standard error.

       -C r/g/b
	   The background value	to be recorded in the RLE file is normally
	   automatically selected from the display. This option	permits	the
	   user	to specify an alternate	background color as a red/green/blue
	   triple, separated by	slashes	("/"). The color intensity in each
	   channel ranges from 0 (dark)	to 255 (bright).

       -X scr_xoff
	   Specify a screen X offset, which will offset	the saved area onto
	   the screen by the given amount. (i.e., -X 10	would place (0,	10) on
	   the screen in the RLE image rectangle coordinate (0,	0).

       -Y scr_yoff
	   Specify a screen Y offset, which will offset	the saved area onto
	   the screen by the given amount.

       file.rle
	   Name	of file	to be written, in RLE format. If not specified,
	   standard output is used instead.

       The run length encoded image format is best used	for the	long-term
       storage of images, as it	uses less disk storage than a pix(5) file, at
       the expense of requiring	more processing	for the	encoding and decoding.
       This program is also useful when	using the Utah Raster Toolkit
       utilities, which	only operate on	RLE encoded files.

EXAMPLES
       fb-rle truck.rle	fb-rle -C 0/255/0 >car.rle fb-rle -h -s	512
       >lowerleft.rle

SEE ALSO
       brlcad(1), rle-fb(1), fb-pix(1),	rle-pix(1), pix-rle(1),	pixrect(1),
       pixscale(1), pixmerge(1), comp(1), crop(1), repos(1), rlepatch(1),
       rlebox(1), librle(3).

AUTHOR
       BRL-CAD Team

COPYRIGHT
       This software is	Copyright (c) 1988-2013	by the United States
       Government as represented by U.S. Army Research Laboratory.

BUG REPORTS
       Reports of bugs or problems should be submitted via electronic mail to
       <devs@brlcad.org>.

BRL-CAD				  07/08/2017			     FB-RLE(1)

NAME | SYNOPSIS | DESCRIPTION | EXAMPLES | SEE ALSO | AUTHOR | COPYRIGHT | BUG REPORTS

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