plan9 man page for cmap

CMAP(9.6)																 CMAP(9.6)

NAME
       cmap - color map format

DESCRIPTION
       A  color  map  is a 256x3-byte translation table for color values.  In a monochrome picture, pixel values index the color map to yield red,
       green and blue, like this:

	      uchar cmap[256][3];
	      red = cmap[pixel][0];
	      green = cmap[pixel][1];
	      blue = cmap[pixel][2];

       In a full-color picture, the color map is, in effect, three intensity-compensation tables: cmap[red][0] maps red  channels,  cmap[green][1]
       maps green channels and cmap[blue][2] maps blue channels.

       A color map file is just a 768-byte file containing the color map, stored in the order implied by the declaration of cmap above.

																	 CMAP(9.6)