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XCMSDB(1)               FreeBSD General Commands Manual              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
       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

       -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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