Provided by: xscreensaver-data-extra_5.14-1ubuntu1_i386 bug

NAME

       zoom - wander around magnified desktop

SYNOPSIS

       zoom  [-display  host:display.screen]  [-foreground color] [-background
       color] [-window] [-root] [-mono] [-install]  [-visual  visual]  [-delay
       usecs]   [-duration  secs]  [-lenses]  [-pixwidth  pixels]  [-pixheight
       pixels] [-pixspacex pixels] [-pixspacey pixels]  [-lensoffsetx  pixels]
       [-lensoffsety pixels] [-fps]

DESCRIPTION

       The  zoom  program takes an image, magnifies it, and scrolls around it,
       fatbits-style.

       The image that it manipulates will be grabbed from the portion  of  the
       screen underlying the window, or from the system's video input, or from
       a  random  file  on  disk,  as  indicated  by  the   grabDesktopImages,
       grabVideoFrames,  and chooseRandomImages options in the ~/.xscreensaver
       file; see xscreensaver-demo(1) for more details.

OPTIONS

       zoom accepts the following options:

       -window Draw on a newly-created window.  This is the default.

       -root   Draw on the root window.

       -mono   If on a color display, pretend we're on a monochrome display.

       -install
               Install a private colormap for the window.

       -visual visual
               Specify which visual to use.  Legal values are the  name  of  a
               visual  class,  or the id number (decimal or hex) of a specific
               visual.

       -delay microseconds
               Slow it down.

       -duration seconds
               How long to run  before  loading  a  new  image.   Default  120
               seconds.

       -lenses Instead  of  doing  magnification we just copy an offset region
               from the  original  image.   If  lensoffsetx  <  pixwidth  (and
               similarly  for Y) then consecutive regions will overlap, giving
               the effect of looking through an array of lenses.

       -pixwidth pixels
               Width of the magnified pixels.

       -pixheight pixels
               Height of the magnified pixels.

       -pixspacex pixels
               Amount of black space between magnified pixels (X direction).

       -pixspacey pixels
               Amount of black space between magnified pixels (Y direction).

       -lensoffsetx pixels
               Distance in X  direction  between  consecutive  copied  regions
               (only effective when -lenses used).

       -lensoffsety pixels
               Distance  in  Y  direction  between  consecutive copied regions
               (only effective when -lenses used).

       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.

SEE ALSO

       X(1), xscreensaver(1), xscreensaver-demo(1), xscreensaver-getimage(1)

COPYRIGHT

       Copyright (C) 2000 by James Macnicol.  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

       James Macnicol <james.macnicol@mailexcite.com>, 20-Nov-2000.  Much code
       was shamelessly stolen from the spotlight hack and a few others.