XCMSDB(1)                                                            XCMSDB(1)



NAME
       xcmsdb  -  Device Color Characterization utility for X Color Management
       System

SYNOPSIS
       xcmsdb [ -query ] [ -remove ] [ -format 32|16|8 ] [ -help ] [  -version
       ] [ 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 prop-
       erties, 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.

       -help   This option prints a  summary  of  the  available  options  and
               exits.

       -version
               This option prints the program version and exits.

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)



                                 X Version 11                        XCMSDB(1)

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