zoom man page

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)

Author

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

Info

5.37-6.fc27.1 (15-Aug-2017) X Version 11 XScreenSaver manual