NAME

       xcmsdb - Device Color Characterization utility for X Color Management System

SYNOPSIS

       xcmsdb [ -query ] [ -remove ] [ -format 32|16|8 ] [ filename ]

DESCRIPTION

       xcmsdb  is  used  to  load,  query, or remove Device Color Characterization data stored in
       properties on the root window of the screen  as  specified  in  section  7,  Device  Color
       Characterization,  of  the  ICCCM.   Device  Color  Characterization data (also called the
       Device Profile) is an integral part of Xlib's X Color Management System (Xcms),  necessary
       for  proper  conversion  of  color  specification  between  device-independent and device-
       dependent forms.  Xcms uses 3x3 matrices stored in the XDCCC_LINEAR_RGB_MATRICES  property
       to  convert color specifications between CIEXYZ and RGB Intensity (XcmsRGBi, also referred
       to  as  linear  RGB).   Xcms  then  uses  display  gamma   information   stored   in   the
       XDCCC_LINEAR_RGB_CORRECTION  property to convert color specifications between RGBi and RGB
       device (XcmsRGB, also referred to as device RGB).

       Note that Xcms allows clients to register  function  sets  in  addition  to  its  built-in
       function  set  for  CRT  color  monitors.  Additional function sets may store their device
       profile information in other properties in function set specific format.  This utility  is
       unaware of these non-standard properties.

       The  ASCII readable contents of filename (or the standard input if no input file is given)
       are appropriately transformed for storage in properties, provided the  -query  or  -remove
       options are not specified.

OPTIONS

       xcmsdb program accepts the following options:

       -query  This  option  attempts  to read the XDCCC properties off the screen's root window.
               If successful, it transforms the data into a more readable format, then sends  the
               data to standard out.

       -remove This option attempts to remove the XDCCC properties on the screen's root window.

       -format 32|16|8
               Specifies   the   property   format  (32,  16,  or  8  bits  per  entry)  for  the
               XDCCC_LINEAR_RGB_CORRECTION property.  Precision of encoded floating point  values
               increases with the increase in bits per entry.  The default is 32 bits per entry.

SEE ALSO

       xprop(1), Xlib documentation

ENVIRONMENT

       DISPLAY to figure out which display and screen to use.

AUTHOR

       Chuck Adams, Tektronix Inc.  Al Tabayoyon, SynChromatics Inc. (added multi-visual support)