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     XCMSDB(1)		X Version 11 (Release 6.4)	     XCMSDB(1)

     NAME    [Toc]    [Back]
	  xcmsdb - Device Color	Characterization utility for X Color
	  Management System

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

     DESCRIPTION    [Toc]    [Back]
	  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 nonstandard

	  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    [Toc]    [Back]
	  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

     Page 1					     (printed 10/9/01)

     XCMSDB(1)		X Version 11 (Release 6.4)	     XCMSDB(1)

		  with the increase in bits per	entry.	The default is
		  32 bits per entry.

     SEE ALSO    [Toc]    [Back]
	  xprop(1), Xlib documentation

     ENVIRONMENT    [Toc]    [Back]
	  DISPLAY to figure out	which display and screen to use.

     AUTHOR    [Toc]    [Back]
	  Chuck	Adams, Tektronix Inc.  Al Tabayoyon, SynChromatics
	  Inc. (added multi-visual support)

     Page 2					     (printed 10/9/01)

[ Back ]
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