xcmsdb - Device Color Characterization utility for X Color Management System
] [ -remove
] [ filename
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
options are not specified.
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.
- -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.
, Xlib documentation
- to figure out which display and screen to use.
Chuck Adams, Tektronix Inc. Al Tabayoyon, SynChromatics Inc. (added multi-visual