Provided by:
magic_7.5.214-1_i386 
NAME
cmap - format of .cmap files (color maps)
DESCRIPTION
Color-map files define the mapping between eight-bit color numbers and
red, green and blue intensities used for those numbers. They are read
by Magic as part of system startup, and also by the :load and :save
commands in color-map windows. Color-map file names usually have the
form x.y.z.cmapn, where x is a class of technology files, y is a class
of displays, z is a class of monitors, and n is a version number
(currently 1). The version number will change in the future if the
formap of color-map files ever changes. Normally, x and y correspond
to the corresponding parts of a display styles file. For example, the
color map file mos.7bit.std.cmap1 is used today for most nMOS and CMOS
technology files using displays that support at least seven bits of
color per pixel and standard-phosphor monitors. It corresponds to the
display styles file mos.7bit.dstyle5.
Color-map files are stored in ASCII form, with each line containing
four decimal integers separated by white space. The first three
integers are red, green, and blue intensities, and the fourth field is
a color number. For current displays the intensities must be integers
between 0 and 255. The color numbers must increase from line to line,
and the last line must have a color number of 255. The red, green, and
blue intensities on the first line are used for all colors from 0 up to
and including the color number on that line. For other lines, the
intensities on that line are used for all colors starting one color
above the color number on the previous line and continuing up and
through the color number on the current line. For example, consider
the color map below:
255 0 0 2
0 0 255 3
255 255 255 256
This color map indicates that colors 0, 1, and 2 are to be red, color 3
is to be blue, and all other colors are to be white.
SEE ALSO
magic(1), dstyle(5)