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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)