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glslideshow(6)		      XScreenSaver manual		glslideshow(6)

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  up-
	       per 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.

SEE ALSO
       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.

X Version 11		      5.44 (20-Mar-2020)		glslideshow(6)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | ENVIRONMENT | SEE ALSO | COPYRIGHT | AUTHOR

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