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

       Rob Nation

       Rewritten and enhanced by fvwm-workers.

3rd Berkeley Distribution                    19 October 2022 (2.7.0)                                fvwm-root(1)

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

       In the past this utility was called xpmroot.  This name is still supported as a symlink.

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  ICONSANDIMAGES section of the main fvwm documentation) can
       be utilized.

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

       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-limitncolors
              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.

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