xcmsdb - Device Color Characterization utility for X Color
xcmsdb [-query] [-remove] [-format 32 | 16 | 8] [filename]
xcmsdb program accepts the following options: 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.
This option attempts to remove the XDCCC properties on the
screen's root window. 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.
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.
to figure out which display and screen to use.
Chuck Adams, Tektronix Inc.; Al Tabayoyon, SynChromatics
Inc. (added multi-visual support)
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