.\" Hey, Emacs!  This is an -*- nroff -*- source file.
.TH wmsetbg 1 "April 2015"
.SH NAME
wmsetbg \- sets the background on the X11 display
.SH SYNOPSIS
.B wmsetbg
.RI [ \-display " display]"
.RI [ \-\-update-domain " domain|" \-\-update-wmaker ]
.RI [ options ]
.RI [ image ]
.SH DESCRIPTION
.B wmsetbg
reads the specified
.I image
(in any format supported by the
.I WRaster
library) and puts it on the root window. It can
either scale the image or tile it to make it fit the root
window. Window Maker uses this command internally to set the root
window image on start up.
.SH OPTIONS
.TP
.BR \-\-back\-color | \-b " \fIcolor\fP"
the specified \fIcolor\fP is used as the background color for the
\fItexture\fP.  Window Maker temporary sets the background to this
color while loading and processing the texture.  You can specify colors
using their X11 names or as an RGB triplet (either as "rgb:RR/GG/BB" or
"#RRGGBB") (reference to appropriate manpage should be here).  In the
later case \fIcolor\fB is a quoted string.
.TP
.BR \-\-center | \-e
centers the \fIimage\fP in the screen
.TP
.BR \-\-colors | \-c " \fIcount\fP"
limit the number of colors per channel to use for the image
.TP
.BR \-display " \fIdisplay\fP"
connect to the X \fIdisplay\fP
.TP
.BR \-\-dither | \-d
enable color dithering on \fIimage\fP
.TP
.BR \-\-fillscale | \-f
scales the specified \fIimage\fP to fill screen while preserving aspect ratio
.TP
.BR \-\-help | \-h
print a help message with the list of options
.TP
.BR \-\-match | \-m
use the best-matching-color algorithm when converting image to indexed color palette
.TP
.BR \-\-maxscale | \-a
scales the specified \fIimage\fP to fit inside the screen preserving its aspect ratio
.TP
.BR \-\-parse | \-p " \fItexture\fP"
parses the specified \fItexture\fP as a \fIproplist style texture\fP
.TP
.BR \-\-scale | \-s
scales the specified \fIimage\fP to fill the screen (default)
.TP
.BR \-\-smooth | \-S
use a smooth scaling algorithm when resizing \fIimage\fP
.TP
.BR \-\-tile | \-t
tiles the specified \fIimage\fP
.TP
.BR \-\-update\-domain | \-D " \fIdomain\fP"
updates the specified \fIdomain\fP database
.TP
.BR \-\-update\-wmaker | \-u
updates the Window Maker defaults database
.TP
.BR \-\-version | \-v
print the version of Window Maker from which the program comes
.TP
.BR \-\-workspace | \-w " \fIworkspace\fP"
update background only for the specified \fIworkspace\fP
.TP
.BR \-\-xinerama | \-X
stretch image across Xinerama heads
.SH "INDEXED COLOR SCREENS"
If your screen is not in a \fBTrue Color\fP configuration (generally sold as 16,777,216 colors) but
in a indexed color mode (256 colors, 16 colors, ... which are based on a \fBColorMap\fP) then Window
Maker may need to process the image to convert it to a limited number of colors before using it for
a background image.

There are two options to choose what algorithm you want to use:
.TP
.BR \-\-match " or " \-m
Search for the closest matching color from the current colormap;
this is the fastest algorithm but may lead to less good-looking result.
.TP
.BR \-\-dither " or " \-d
Use a more complex algorithm which modify surrounding pixels to get a closer-looking color on average;
this is slower but provides better looking images.
.LP
If none is specified, then it is Window Maker's configuration choice that will be used.

You can also use the option \fB\-\-colors\fP to reduce the total number of colors from the \fIimage\fP
before the algorithm is applied.
The value specified with the option defines the number of possible values for each primary color
(red, green and blue), for example \fI8\fP would reduce the image to use only 8*8*8=512 colors before
applying the conversion algorithm.
.SH SEE ALSO
.BR wmaker (1)
.SH AUTHOR
This man page was written by Marcelo Magallon <mmagallo@debian.org>.
.PP
Window Maker was written by Alfredo K. Kojima <kojima@windowmaker.info>.
wmsetbg was written by Dan Pascu <dan@windowmaker.info>