NAME

       fvwm-root - Sets the root window of the current X display to image

SYNOPSIS

       fvwm-root [--retain-pixmap|-r] [--no-retain-pixmap] [--dummy|-d] [--no-dummy] [--dither]
       [--no-dither] [--color-limit [ncolors] ] [--no-color-limit] [--help|-h|-?] [--version|-V]
       image_file

DESCRIPTION

       fvwm-root reads the image file specified in the command line and displays it in the root
       window. The supported image formats are XBM, XPM, PNG and SVG if appropriated libraries
       are compiled in.

       SVG rendering options (as described in the * ICONS AND IMAGES * section of the main fvwm
       documentation) can be utilized.

OPTIONS

       These command line options are recognized by fvwm-root:

       --retain-pixmap | -r
           Causes fvwm-root to retain and publish the Pixmap with which the background has been
           set (the ESETROOT_PMAP_ID and _XROOTPMAP_ID properties are used). This is useful for
           applications which want to use the root Pixmap on the background to simulate
           transparency (for example, Eterm and Aterm use this method). This option should also
           be used for the RootTransparent colorset option, refer to the COLORSETS section of
           fvwm(1). If this option is not used, fvwm-root sets the _XSETROOT_ID property to None,
           and some programs, like fvwm modules, may use this to update their background if the
           background is transparent (Transparent colorset).

           Note, a well behaved program, like fvwm, should listen to both _XSETROOT_ID and
           _XROOTPMAP_ID property changes and update itself correspondingly. However some
           programs listen only to one of them, so you should either use this option or not
           depending on what part is implemented by these programs. You should also use this
           option to get fast root-transparent menus in fvwm.

       --no-retain-pixmap
           This is a default. May be useful to explicitly force the default even if
           "--retain-pixmap" is specified earlier.

       --dummy | -d
           Causes fvwm-root NOT to set the background, but to only free a memory associated with
           the ESETROOT_PMAP_ID property (if any). In any case the _XSETROOT_ID property is set
           to None.

       --no-dummy
           This is a default. May be useful to explicitly force the default even if "--dummy" is
           specified earlier.

       --dither
           Causes fvwm-root to dither images for "smoother" rendition on displays with color
           depth of 16 or lower. This the default with color depth less or equal to 8.

       --no-dither
           Causes fvwm-root NOT to dither images. This is the default with color depth greater
           than 8.

       --color-limit ncolors
           Causes fvwm-root to limit its color use to ncolors (if specified). This option is
           taken in account only with color depth less or equal to 8 (and a TrueColor or
           GrayScale visual). The default is to use the same color limit as fvwm. So in normal
           situation this option is not useful. However, if fvwm use a private colors map, as
           fvwm-root always use the default colors map you should use this option for limiting
           colors correctly. If ncolors is not specified a default is used.

       --no-color-limit
           Causes fvwm-root NOT to limit its color use.

       --help
           Shows a short usage.

       --version
           Shows a version number.

BUGS

       Repeated use of fvwm-root with different xpm pixmaps will use up slots in your color table
       pretty darn fast.

AUTHOR

       Rob Nation

       Rewritten and enhanced by fvwm-workers.

                                            2022-10-07                               FVWM-ROOT(1)