XCMSDB(1)
Contents
xcmsdb - Device Color Characterization utility for X Color
Management System
xcmsdb [ -query ] [ -remove ] [ -format 32|16|8 ] [ file
name ]
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 Char
acterization 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_LIN
EAR_RGB_MATRICES property to convert color specifications
between CIEXYZ and RGB Intensity (XcmsRGBi, also referred
to as linear RGB). Xcms then uses display gamma informa
tion 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 moni
tors. 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 trans
formed 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 proper
ties 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)
X Version 11 Release 6.4 2
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