Section: XScreenSaver manual (6)
Updated: 5.40 (12-Aug-2018)
zoom - wander around magnified desktop
] [-foreground color
] [-window] [-root] [-mono] [-install]
] [-pixheight pixels
] [-pixspacey pixels
] [-lensoffsety pixels
program takes an image, magnifies it, and scrolls around
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
for more details.
accepts the following options:
Draw on a newly-created window. This is the default.
Draw on the root window.
If on a color display, pretend we're on a monochrome display.
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.
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
- -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
- -lensoffsety pixels
Distance in Y direction between consecutive copied regions (only effective
to get the default host and display number.
to get the name of a resource file that overrides the global resources
stored in the RESOURCE_MANAGER property.
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.
James Macnicol <email@example.com>, 20-Nov-2000. Much code was
shamelessly stolen from the
hack and a few others.