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 © 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.