makemap(1G)

NAME
     makemap - store colors into the gl color map

SYNOPSIS
     makemap [ -full ]

DESCRIPTION
     A colormap is a mapping from color-index values (integers) into RGB
     values.  All GL programs (graphics programs linked with libgl) share a
     common X colormap, which is distinct from the default X root colormap.

     Essentially, makemap causes a certain set of colors to be assigned to the
     GL colormap (which is just another X colormap as far as the X server is
     concerned).

     Although there may be multiple X colormaps defined in the system at any
     one time, only one of these X colormaps is installed (loaded into the
     single hardware colormap) at any given time.  The GL colormap will be
     installed whenever GL programs have input focus.

     The GL colormap is relevant only for GL programs running in cmode
     (color-index mode).

     By default, makemap will initialize the first 256 entries in the GL
     colormap with the exception of color cells 16 thru 31.  The reason for
     not initializing 16-31 is so that X clients can use those cells without
     interfering with GL programs.  The lowest eight colors of the GL colormap
     are mapped to the eight standard colors of the Graphics Library (black,
     red, green, yellow, blue, magenta, cyan and white).  The next 8 colors
     (8-15) are mapped to some pastel shades as used by the IRIS Workspace and
     other system tools.  These colors can be dithered with the first eight to
     get a very wide range even on a minimal system when in double buffered
     mode.  The next 16 colors (16-31) are left untouched.  The next 24 colors
     (32 to 55) are mapped as a black to almost-white gray ramp.  The
     remaining 200 colors (56 to 255) are mapped as a 5*8*5 color cube, which
     starts at black and ends with white.  In this color cube, the 8 levels of
     green change the fastest, then 5 levels of red, and finally the 5 levels
     of blue change slowest.

     Options:

     -full If there are more than eight planes, map color cells 256-511 to the
           ordered color map used by some of the image tools in the 4DGifts
           package and colors 512-767 to a 256 level black to white gray ramp.

SEE ALSO
     loadmap(1G), savemap(1G), showmap(1G),