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X11R7.4 - man page for xcmsdb (x11r4 section 1)

XCMSDB(1)			     General Commands Manual				XCMSDB(1)

       xcmsdb - Device Color Characterization utility for X Color Management System

       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  Char-
       acterization,  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 lin-
       ear RGB).  Xcms then uses display gamma information stored in the XDCCC_LINEAR_RGB_CORREC-
       TION  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  func-
       tion  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.

       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_LIN-
	       EAR_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)

X Version 11				   xcmsdb 1.0.1 				XCMSDB(1)

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