redhat man page for zoom

XScreenSaver(1) 					      General Commands Manual						   XScreenSaver(1)

NAME
       zoom - wander around magified desktop

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

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.

       -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 consective copied regions (only effective when -lenses used).

       -lensoffsety pixels
	       Distance in Y direction between consective 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.

X Version 11							    20-Nov-2000 						   XScreenSaver(1)