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 properties, 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)