xcmsdb



XCMSDB(1)                                                            XCMSDB(1)




NAME

       xcmsdb  -  Device Color Characterization utility for X Color Management
       System


SYNOPSIS

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


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)



                                                                     XCMSDB(1)

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