MAKEMAP(1G)MAKEMAP(1G)NAMEmakemap - store colors into the gl color map
SYNOPSISmakemap [ -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 ALSOloadmap(1G), savemap(1G), showmap(1G),
NOTESmakemap was retired on SG2 graphics without replacement.
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