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NAME

       webcollage - decorate the screen with random images from the web

SYNOPSIS

       webcollage  [-display  host:display.screen]  [-root]  [-window-id id] [-verbose] [-timeout
       secs] [-delay secs] [-background bg] [-no-output] [-urls-only]  [-imagemap  filename-base]
       [-size   WxH]   [-opacity   ratio]   [-filter  command]  [-filter2  command]  [-http-proxy
       host[:port]] [-dictionary dictionary-file] [-driftnet [cmd]] [-directory dir] [-fps]

DESCRIPTION

       The webcollage program pulls random image off of the World Wide Web and scatters  them  on
       the  root  window.   One  satisfied  customer  described  it  as  "a  nonstop  pop culture
       brainbath."  This program finds its images by doing random web  searches,  and  extracting
       images from the returned pages.

       webcollage is written in perl(1) and requires Perl 5.

       It  will  be  an  order of magnitude faster if you also have the webcollage-helper program
       installed (a GDK/JPEG image compositor), but webcollage works without it as well.

       webcollage can be used in conjunction with the driftnet(1) program (the Unix equivalent of
       EtherPEG)  to  snoop  images  from traffic on your local subnet, instead of getting images
       from search engines.

OPTIONS

       webcollage accepts the following options:

       -root   Draw on the root window.  This option is mandatory, if output is  being  produced:
               drawing to a window other than the root window is not yet supported.

               Images    are    placed    on    the   root   window   by   using   one   of   the
               xscreensaver-getimage(6x),  chbg(1),  xv(1),  xli(1),  or  xloadimage(1)  programs
               (whichever is available.)

       -window-id id
               Draw    to    the   indicated   window   instead;   this   only   works   if   the
               xscreensaver-getimage(6x) program is installed.

       -verbose or -v
               Print diagnostics to stderr.  Multiple -v switches increase the amount of  output.
               -v  will  print  out  the URLs of the images, and where they were placed; -vv will
               print out any warnings, and all URLs being loaded; -vvv will print information  on
               what URLs were rejected; and so on.

       -timeout seconds
               How long to wait for a URL to complete before giving up on it and moving on to the
               next one.  Default 30 seconds.

       -delay seconds
               How long to sleep between images.  Default 2 seconds.  (Remember that this program
               probably spends a lot of time waiting for the network.)

       -background color-or-ppm
               What  to use for the background onto which images are pasted.  This may be a color
               name, a hexadecimal RGB specification in the form '#rrggbb', or the name of a  PPM
               file.

       -size WxH
               Normally,  the  output  image will be made to be the size of the screen (or target
               window.)  This lets you specify the desired size.

       -opacity ratio
               How transparently to paste the  images  together,  with  0.0  meaning  "completely
               transparent"  and 1.0 meaning "opaque."  Default 0.85.  A value of around 0.3 will
               produce an interestingly blurry image after a while.

       -no-output
               If this option is specified, then no composite output  image  will  be  generated.
               This is only useful when used in conjunction with -verbose.

       -urls-only
               If  this  option  is  specified, then no composite output image will be generated:
               instead, a list of image URLs will be printed on stdout.

       -imagemap filename-base
               If this option is specified, then instead of writing an image to the root  window,
               two  files  will  be  created:  "base.html"  and "base.jpg".  The JPEG will be the
               collage; the HTML file will include that image, and an image-map making  the  sub-
               images   be   linked   to   the   pages  on  which  they  were  found  (just  like
               https://www.jwz.org/webcollage/.)

       -filter command
               Filter all source images through this command.  The command must take a  PPM  file
               on  stdin, and write a new PPM file to stdout.  One good choice for a filter would
               be:

                    webcollage -root -filter 'vidwhacker -stdin -stdout'

       -filter2 command
               Filter the composite image through this command.  The -filter  option  applies  to
               the sub-images; the -filter2 applies to the final, full-screen image.

       -http-proxy host:port
               If you must go through a proxy to connect to the web, you can specify it with this
               option, or with the $http_proxy or $HTTP_PROXY environment variables.

       -dictionary file
               Webcollage normally looks  at  the  system's  default  spell-check  dictionary  to
               generate  words  to  feed  into  the search engines.  You can specify an alternate
               dictionary with this option.

               Note that by default, webcollage  searches  for  images  using  several  different
               methods,  not  all  of  which  involve  dictionary  words,  so  using  a "topical"
               dictionary file will not, in itself, be as effective as you might be hoping.

       -driftnet [ args ]
               driftnet(1) is a program that snoops your local ethernet for  unencrypted  packets
               that  look  like  they  might  be image files.  It can be used in conjunction with
               webcollage to generate a collage of what other people on your network are  looking
               at,  instead  of  a search-engine collage.  If you have driftnet installed on your
               $PATH, just use the -driftnet option.  You can also specify the  location  of  the
               program like this:

                    -driftnet /path/to/driftnet

               or, you can provide extra arguments like this:

                    -driftnet '/path/to/driftnet -extra -args'

               Driftnet  version  0.1.5  or  later  is  required.  Note that the driftnet program
               requires root access, so you'll have to make driftnet be setuid-root for  this  to
               work.  Please exercise caution.

       -directory dir
               Instead of searching the web for images, use the contents of the given directory.

       -fps    Display the current frame rate and CPU load (MacOS only).

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.

       http_proxy or HTTP_PROXY
               to get the default HTTP proxy host and port.

FILES AND URLS

       /usr/dict/words, /usr/share/lib/dict/words, or /usr/share/dict/words to  find  the  random
       words to feed to certain search engines.

           http://www.altavista.com/image/randomlink,
           http://random.yahoo.com/fast/ryl,
           http://www.livejournal.com/stats/latest-img.bml, and
           http://www.google.com/ to find random web pages.

BOOBIES

       The  Internet being what it is, absolutely anything might show up in the collage including
       -- quite possibly -- pornography, or even nudity.

BUGS

       Animating GIFs are not supported: only the first frame will be used.

UPGRADES

       The  latest  version  of  webcollage  can  be  found  as  a  part  of   xscreensaver,   at
       https://www.jwz.org/xscreensaver/,      or      on      the     WebCollage     page     at
       https://www.jwz.org/webcollage/.

       DriftNet: http://www.ex-parrot.com/~chris/driftnet/

SEE ALSO

       X(1), xscreensaver(1), xli(1), xv(1), xloadimage(1), ppmmake(1), giftopnm(1), pnmpaste(1),
       pnmscale(1),   djpeg(1),  cjpeg(1),  xdpyinfo(1),  perl(1),  vidwhacker(6x),  dadadodo(1),
       driftnet(1) EtherPEG, EtherPeek

COPYRIGHT

       Copyright © 1998-2018 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
       notice  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>, 24-May-1998.