1vidwhacker(6x)                XScreenSaver manual               vidwhacker(6x)
2
3
4

NAME

6       vidwhacker - grab images and apply random filters to them
7

SYNOPSIS

9       vidwhacker  [-display  host:display.screen] [-root] [-verbose] [-stdin]
10       [-stdout] [-delay seconds] [-directory directory]
11

DESCRIPTION

13       The vidwhacker program grabs an image from disk, or  from the  system's
14       video  input, then applies random image filters to it, and displays the
15       result.  The vidwhacker program does not terminate until killed.
16
17       It depends heavily on the various PBM tools (e.g., ppmrelief(1).)
18
19       Selection of random image files is done by  running  the  xscreensaver-
20       getimage-file(1)  program.   Capture  of video frames (if requested) is
21       done  by  running  the  xscreensaver-getimage-video(1)  program.    The
22       options  of  whether  to  do  video,  and which directory to search for
23       images, are specified in the ~/.xscreensaver file.
24

OPTIONS

26       vidwhacker accepts the following options:
27
28       -root   Draw on the root window.  This is the default.
29
30       -verbose
31               Print diagnostics.
32
33       -stdin  Instead of grabbing an image from disk or video, read an  image
34               to manipulate from stdin.  This image must be in ppm(5) format.
35               The program will still perform repeated random image  transfor‐
36               mations,  but it will always use this one image as its starting
37               point.
38
39       -delay seconds
40               How long to sleep  between  images.   Default  5  seconds  (the
41               actual  elapsed time is significantly longer, due to processing
42               time.)
43
44       -stdout Instead of displaying the image on a window  or  on  the  root,
45               write the new image on stdout, and exit.
46
47       -directory directory
48               Use  this  directory instead of the imageDirectory specified in
49               the ~/.xscreensaver file.
50

ENVIRONMENT

52       DISPLAY to get the default host and display number.
53
54       XENVIRONMENT
55               to get the name of a resource file that  overrides  the  global
56               resources stored in the RESOURCE_MANAGER property.
57

BUGS

59       It's slow.
60

TO DO

62       It  might be interesting to rewrite this to use gimp(1) plugins instead
63       of the pbm tools.  It probably wouldn't be any faster, but there  would
64       be a wider variety of effects available.
65

SEE ALSO

67       X(1),   xscreensaver(1),  xscreensaver-getimage-file(1),  xscreensaver-
68       getimage-video(1), xv(1), ppmtogif(1), cjpeg(1)
69

71       Copyright © 1998-2001 by Jamie Zawinski.  Permission to use, copy, mod‐
72       ify,  distribute,  and sell this software and its documentation for any
73       purpose is hereby granted without fee, provided that  the  above  copy‐
74       right  notice  appear in all copies and that both that copyright notice
75       and this permission notice appear in supporting documentation.  No rep‐
76       resentations  are  made  about the suitability of this software for any
77       purpose.  It is provided "as is" without express or implied warranty.
78

AUTHOR

80       Jamie Zawinski <jwz@jwz.org>, 18-Jan-98.
81
82
83
84X Version 11                 5.05-3 (06-Apr-2008)               vidwhacker(6x)
Impressum