xscreensaver(1)
NAME
glslideshow - slideshow of images using smooth zooming and
fades
SYNOPSIS
glslideshow [-display host:display.screen] [-visual visual] [-window] [-root] [-pan seconds] [-fade seconds] [-zoom percent] [-delay usecs] [-cutoff int] [-fps] [-debug] [-wireframe]
DESCRIPTION
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 sup
porting large textures.
To specify the directory that images are loaded from, run
xscreensaver-demo(1) and click on the "Advanced" tab.
OPTIONS
- -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. - -window Draw on a newly-created window. This is the
- default.
- -root Draw on the root window.
- -pan seconds
- How long each pan should last. Default 6 seconds.
- -fade seconds
- How long each fade (in and out) should last.
Default 2 seconds. If set to 0, then no crossfading will be done (all transitions will be jumpcuts.) - Note that fades are included in the pan, so -pan
should always be longer than -fade (it is autocorrected if not.) - -zoom number
- 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, however, assuming -fade
is non-zero. - -delay number
- Per-frame delay, in microseconds. Default: 20000
(0.02 seconds.). - -cutoff number
- If the frame rate drops below this number of
frames per second, then certain features will be
turned off automatically (first zooming, then, if
the low frame rates persist, fading.) Default 5. - The idea here is that if your machine can't main
tain 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 this
check. - -fps Whether to show a frames-per-second display at the
- bottom of the screen.
- -debug Prints debugging info to stderr.
- -wireframe
- Instead of loading images, simply animates repre
sentative grids instead.
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_MAN
AGER property.
SEE ALSO
X(1), xscreensaver-demo(1) xscreensaver-getimage(1)
xscreensaver(1)
COPYRIGHT
Copyright © 2003 by Jamie Zawinski, based on an earlier
version that was Copyright © 2002 by Mike Oliphant. Orig
inally derived from flipscreen3d(1), which was Copyright ©
2001 Ben Buxton.
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 pro
vided "as is" without express or implied warranty.
AUTHOR
- Jamie Zawinski and Mike Oliphant.