--- /dev/null
+.TH XScreenSaver 1 "" "X Version 11"
+.SH NAME
+tessellimage - Converts an image to triangles using Delaunay tessellation.
+.SH SYNOPSIS
+.B tessellimage
+[\-display \fIhost:display.screen\fP]
+[\-visual \fIvisual\fP]
+[\-window]
+[\-root]
+[\-delay \fInumber\fP]
+[\-duration \fInumber\fP]
+[\-duration2 \fInumber\fP]
+[\-max-depth \fInumber\fP]
+[\-no-outline]
+[\-no-fill-screen]
+[\-fps]
+.SH DESCRIPTION
+Converts an image to triangles using Delaunay tessellation, and animates
+the result at various depths. More triangles are allocated to visually
+complex parts of the image. This is accomplished by first computing the
+first derivative of the image: the distance between each pixel and its
+neighbors. Then the Delaunay control points are chosen by selecting those
+pixels whose distance value is above a certain threshold: those are the
+pixels that have the largest change in color/brightness.
+.SH OPTIONS
+.TP 8
+.B \-visual \fIvisual\fP
+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.
+.TP 8
+.B \-window
+Draw on a newly-created window. This is the default.
+.TP 8
+.B \-root
+Draw on the root window.
+.TP 8
+.B \-delay \fInumber\fP
+Per-frame delay, in microseconds. Default: 30000 (0.03 seconds).
+.TP 8
+.B \-duration \fInumber\fP
+Length of time until loading a new image. Default: 2 minutes.
+.TP 8
+.B \-duration2 \fInumber\fP
+Length of time until increasing or decreasing the triangulation depth.
+Default: 0.4 seconds.
+.TP 8
+.B \-max-depth \fInumber\fP
+The maximum number of triangles to render. Default: 40000.
+.TP 8
+.B \-outline | \-no-outline
+Whether to outline the triangles.
+.TP 8
+.B \-fill-screen | \-no-fill-screen
+Whether to zoom in on the image to completely fill the screen,
+or to center it.
+.TP 8
+.B \-fps | \-no-fps
+Whether to show a frames-per-second display at the bottom of the screen.
+.SH ENVIRONMENT
+.PP
+.TP 8
+.B DISPLAY
+to get the default host and display number.
+.TP 8
+.B XENVIRONMENT
+to get the name of a resource file that overrides the global resources
+stored in the RESOURCE_MANAGER property.
+.SH SEE ALSO
+.BR X (1),
+.BR xscreensaver (1)
+.SH COPYRIGHT
+Copyright \(co 2014 by Jamie Zawinski. 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 provided "as is" without
+express or implied warranty.
+.SH AUTHOR
+Jamie Zawinski.
projects / xscreensaver / blobdiff