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 nonstandard 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)