NAME

cmap_alloc − allocate default colormaps for non-default visuals

SYNOPSIS

cmap_alloc [ −display display:n.screen ] [ −force ] [ −allscreens ]
[ −depth n ] [ −visual class ] [ −verbose ] [ −help ]

DESCRIPTION

cmap_alloc creates empty colormaps for non-default dynamic visuals that are suitable for use as default colormaps.  An X11 server has only one default colormap, and it is associated with the default visual.  Clients that need to access non-default visuals have to create their own colormaps.  This can lead to gratuitous colormap flashing if a lot of applications are running in non-default visuals.  cmap_alloc will create colormaps that can be used by such applications as the default colormap for the given visual.  Once the colormap has been created for a given visual, it will place the colormap’s XID into the RGB_DEFAULT_MAP property on the root window of the display.  Clients that need to access non-default dynamic visuals should search this property using XGetRBGColormaps() for a suitable colormap to use. 

OPTIONS

−display display:n.screen
Indicates which X11 server to use.  The default is to use the value set in the DISPLAY environment variable. 

−forceCreate a colormap even if a suitable colormap is already listed in the RGB_DEFAULT_MAP property. 

−allscreensCreate default colormaps for all screens of the display.  Without this option, colormaps will only be created for the default screen. 

−depth nCreate default colormaps only for those visuals that have depth n.  The default is to create colormaps for visuals of all depths

−visual class
Create default colormaps only for those visuals that are of class class.  Where class is one of the following: GrayScale, PsuedoColor, DirectColor .  The default is to create colormaps for all visual classes. 

−verbosePrint out diagnostic messages useful for debugging. 

−helpPrint out a short usage message and exit. 

SEE ALSO

xstdcmap(1), cmap_compact(1)

DIAGNOSTICS

can’t open display ...
Error in connecting to the X11 server.  Check DISPLAY environment variable. 

unknown depth Invalid depth specified for the −depth command line option

unknown visual class
Invalid visual class specified for the −visual command line option

Sun Microsystems  —  Last change: 18 March 1992