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)

4th Berkeley Distribution                                                                                CMAP(5)