Provided by: xscreensaver-data-extra_5.08-0ubuntu3_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 pix-
        els] [-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, grabVide-
        oFrames,  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  sec-
                onds.
 
        -lenses Instead  of  doing  magnification we just copy an offset region
                from the original image.  If lensoffsetx < pixwidth (and  simi-
                larly  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.
        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  pur-
        pose  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 repre-
        sentations are made about the suitability of this software for any pur-
        pose.  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.