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XCMSDB(1)							     XCMSDB(1)

       xcmsdb  -  Device Color Characterization	utility	for X Color Management

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

       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.

       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

       -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.

       xprop(1), Xlib documentation

       DISPLAY to figure out which display and screen to use.

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

XFree86				 Version 4.7.0			     XCMSDB(1)


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