Provided by: xscreensaver-gl_5.08-0ubuntu3_i386 bug
 

NAME

        glslideshow - slideshow of images using smooth zooming and fades
 

SYNOPSIS

        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]
 

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 supporting 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.
 
        -duration seconds
                How long each image will be displayed before loading a new one.
                Default 30 seconds.
 
        -pan 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.
 
        -fade seconds
                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.
 
        -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 if -fade is non-zero.)
 
        -titles Whether to print the file name of  the  current  image  in  the
                upper left corner.
 
        -letterbox
                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
                the default.
 
        -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.
 
        -delay number
                Per-frame delay, in microseconds.  Default:  20000  (0.02  sec-
                onds.).
 
        -fps    Display the current frame rate, CPU load, and polygon count.
 
        -cutoff number
                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
                this check.
 
        -debug  Prints debugging info to stderr.
 
        -wireframe
                Another debug mode.
 

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.
        X(1),  xscreensaver-demo(1), xscreensaver-getimage(1), xscreensaver(1),
        carousel(6) photopile(6)
 

COPYRIGHT

        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.
 

AUTHOR

        Jamie Zawinski and Mike Oliphant.