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FB-PNG(1)			    BRL-CAD			     FB-PNG(1)

NAME
       fb-png -	save a framebuffer image in a color Portable Network Graphics
       (PNG) file

SYNOPSIS
       fb-png [-ic] [-ggamma] [-Fframebuffer] [-ssquaresize] [-wwidth]
	      [-nheight] [file.png]

DESCRIPTION
       Fb-png will take	a region of a framebuffer display and save it as a
       color png format	file. The environment variable

       FB_FILE is used to select the display device (see brlcad(1)). If	this
       variable	is not set, the	default	device for your	system will be used.
       Alternatively, the framebuffer may be explicitly	specified by using the
       -F flag.

       By default, the output png file,	and the	requested framebuffer size, is
       assumed to be 512x512 pixels. The -s flag will set both the file	height
       and width to be the given size, while -w	and -n sets them individually.

       A first quadrant	coordinate system is used (origin in lower left	of
       screen),	and the	area saved is normally from this origin. The -i	flag
       switches	to a fourth quadrant system, both in the storage order as well
       as the origin offset coordinates	(i.e. origin is	now the	upper left
       corner of the screen).

       The -c flag specifies that the color map	in the frame buffer should be
       applied to the pixel values (AcAAcrunchedAcAA) before they are written
       to the output file.

       The -g gamma flag sets the specified gamma correction value into	the
       created PNG file. A value of 0.6	is a close approximation of PC display
       monitors. A negative gamma value	disables writing a gAMA	chunk out
       entirely	(and is	the default).

SEE ALSO
       brlcad(1), png-fb(1), fb-bw(1), pix(5)

AUTHOR
       John R. Anderson

COPYRIGHT
       This software is	Copyright (c) 1998-2013	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-PNG(1)

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

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