Unix/Linux Go Back    

Plan 9 - man page for cmap (plan9 section 9)

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:   man
Select Man Page Set:       apropos Keyword Search (sections above)

CMAP(9.6)										CMAP(9.6)

       cmap - color map format

       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.

Unix & Linux Commands & Man Pages : ©2000 - 2018 Unix and Linux Forums

All times are GMT -4. The time now is 07:24 PM.