glslideshow - slideshow of images using smooth zooming and fades
glslideshow [-display host:display.screen] [-visual visual] [-window]
[-root] [-duration seconds] [-zoom percent] [-pan seconds] [-fade sec-
onds] [-titles] [-letterbox | -clip] [-delay usecs] [-fps] [-debug]
[-wireframe] [-cutoff int]
Loads a random sequence of images and smoothly scans and zooms around
in each, fading from pan to pan.
This program requires a good video card capable of supporting large
To specify the directory that images are loaded from, run xscreensaver-
demo(1) and click on the "Advanced" tab.
Specify which visual to use. Legal values are the name of a
visual class, or the id number (decimal or hex) of a specific
-window Draw on a newly-created window. This is the default.
-root Draw on the root window.
How long each image will be displayed before loading a new one.
Default 30 seconds.
How long each pan-and-zoom should last. Default 6 seconds.
With the default settings of -pan 6 -duration 30, each image
will be displayed five times (30/6), and then a new image will
be loaded. If you want a new image to be loaded at each fade,
then set -pan and -duration to the same value.
How long each cross-fade between images should last. Default 2
seconds. If set to 0, then no cross-fading will be done (all
transitions will be jump-cuts.)
Note that fades are included in the pan time, so -fade cannot
be larger than -pan.
Amount to zoom and pan as a percentage. Default: 75, meaning
that 75% or more of each image will always be visible. If set
to 100%, then the images will always fill the screen, and no
panning or zooming will occur. (Images will still smoothly
fade from one to another if -fade is non-zero.)
-titles Whether to print the file name of the current image in the
upper left corner.
In "letterbox" mode, when an image is not the same aspect ratio
as the screen, black bars will appear at the top/bottom or
left/right so that the whole image can be displayed. This is
-clip In "clip" mode, when an image is not the same aspect ratio as
the screen, we will zoom in further until the image takes up
the whole screen. This is the opposite of -letterbox.
Per-frame delay, in microseconds. Default: 20000 (0.02 sec-
-fps Whether to show a frames-per-second display at the bottom of
If the frame rate we are achieving is lower than this, then
panning, fading, and zooming will be disabled. Default 5 FPS.
The idea here is that if your machine can't maintain a decent
frame rate, then it must not have fast 3D hardware, so we might
as well behave in a simpler manner. Set this to 0 to disable
-debug Prints debugging info to stderr.
Another debug mode.
DISPLAY 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.
X(1), xscreensaver-demo(1), xscreensaver-getimage(1), xscreensaver(1),
Copyright (C) 2003-2005 by Jamie Zawinski, based on an earlier version
that was Copyright (C) 2002 by Mike Oliphant.
Permission to use, copy, modify, distribute, and sell this software and
its documentation for any purpose is hereby granted without fee, pro-
vided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in sup-
porting documentation. No representations are made about the suitabil-
ity of this software for any purpose. It is provided "as is" without
express or implied warranty.
Jamie Zawinski and Mike Oliphant.
X Version 11 4.21 (01-Mar-2005) XScreenSaver(6x)