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Vis > utilities > GFDL Visualization Guide: xcmap

GFDL Visualization Guide: xcmap

NAME

     xcmap - displays the default colormap on X11 displays

SYNTAX

     xcmap [ [-d] display] [ [-g] geometry]

DESCRIPTION

     xcmap is an X11 program that displays the contents	of the colormap	on  4,
     6,	 and 8-bit PseudoColor (or GreyScale) displays.	 It displays a grid of
     squares, (4x4, 8x8, or 16x16 grid,	depending on  the  number  of  planes)
     that  correspond to entries in the	colormap.  The squares are (of course)
     drawn in their corresponding color.

     You may click (with the left button) on any of these squares.   Doing  so
     will  display the pixel number corresponding to that square, and its red,
     green, and	blue components	(as 4-digit hex	numbers).  It will continue to
     do	this as	long as	you hold the button down.

BUGS

     This program only works on	colormapped displays (PseudoColor,  GreyScale,
     StaticColor, and StaticGrey visuals).  Running it on a display that has a
     default visual type of 'TrueColor'	or 'DirectColor' will  do  nothing  of
     value, and	may or may not work at all.

     Also, this	program	only works on 4, 6, and	8-bit displays.	 Period.

AUTHOR

     John Bradley  -  bradley@dccs.upenn.edu
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last modified: February 20 2004.