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vidwhacker(6)		      XScreenSaver manual		 vidwhacker(6)

NAME
       vidwhacker - grab images	and apply random filters to them

SYNOPSIS
       vidwhacker  [-display  host:display.screen] [-root] [-verbose] [-stdin]
       [-stdout] [-delay seconds] [-directory directory] [-fps]

DESCRIPTION
       The vidwhacker program grabs an image from disk,	or  from the  system's
       video  input, then applies random image filters to it, and displays the
       result.	The vidwhacker program does not	terminate until	killed.

       It depends heavily on the various PBM tools (e.g., ppmrelief(1).)

       Selection of random image files is done by  running  the	 xscreensaver-
       getimage-file(1)	 program.   Capture  of	video frames (if requested) is
       done by running the xscreensaver-getimage-video(1)  program.   The  op-
       tions of	whether	to do video, and which directory to search for images,
       are specified in	the ~/.xscreensaver file.

OPTIONS
       vidwhacker accepts the following	options:

       -root   Draw on the root	window.	 This is the default.

       -verbose
	       Print diagnostics.

       -stdin  Instead of grabbing an image from disk or video,	read an	 image
	       to manipulate from stdin.  This image must be in	ppm(5) format.
	       The program will	still perform repeated random image  transfor-
	       mations,	 but it	will always use	this one image as its starting
	       point.

       -delay seconds
	       How long	to sleep between images.  Default 5 seconds  (the  ac-
	       tual  elapsed  time  is significantly longer, due to processing
	       time.)

       -stdout Instead of displaying the image on a window  or	on  the	 root,
	       write the new image on stdout, and exit.

       -directory directory
	       Use  this  directory instead of the imageDirectory specified in
	       the ~/.xscreensaver file.

       -fps    Display the current frame rate and CPU load.

ENVIRONMENT
       DISPLAY to get the default host and display number.

       XENVIRONMENT
	       to get the name of a resource file that	overrides  the	global
	       resources stored	in the RESOURCE_MANAGER	property.

BUGS
       It's slow.

TO DO
       It  might be interesting	to rewrite this	to use gimp(1) plugins instead
       of the pbm tools.  It probably wouldn't be any faster, but there	 would
       be a wider variety of effects available.

SEE ALSO
       X(1),   xscreensaver(1),	 xscreensaver-getimage-file(1),	 xscreensaver-
       getimage-video(1), xv(1), ppmtogif(1), cjpeg(1)

COPYRIGHT
       Copyright (C) 1998-2001 by Jamie	Zawinski.  Permission  to  use,	 copy,
       modify,	distribute,  and  sell this software and its documentation for
       any purpose is hereby granted without  fee,  provided  that  the	 above
       copyright  notice appear	in all copies and that both that copyright no-
       tice and	this permission	notice appear in supporting documentation.  No
       representations are made	about the suitability of this software for any
       purpose.	 It is provided	"as is"	without	express	or implied warranty.

AUTHOR
       Jamie Zawinski <jwz@jwz.org>, 18-Jan-98.

X Version 11		      5.44 (20-Mar-2020)		 vidwhacker(6)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | ENVIRONMENT | BUGS | TO DO | SEE ALSO | COPYRIGHT | AUTHOR

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