mct

Name

mct - Create a color table from ascii data.

Syntax

 mct [-title <title>] [<input-file> [<output-file>]]

Description

mct creates a color table from an ascii file of color information. The resulting colortable may be used on 8-bit PseudoColor visuals as well as on 24-bit composite-colormap visuals (DirectColor and TrueColor).

Each line in the file describes a color in the colortable. The line-format is

 <colornumber> <red-val> <green-val> <blue-val>

colornumber is an unsigned integer. It is used as an index to lookup red-val, green-val and blue-val.

red-val, green-val and blue-val are the intensities of the colors in the range 0 - 65535. A special notation

 c1 r1 g1 b1
 :
 c2 r2 g2 b2

defines a linear stretch in the range c1 to c2, i.e. the colornumbers in the range c1 to c2 will get red intensities in the range r1 to r2, green in the range g1 to g2 and blue in the range b1 to b2. The ranges are linearly interpolated.

Lines with a # in coloumn 1 are treated as comments.

Modification

The format has been modified to allow comments, starting with a `#`, at the end of the lines. This can be used e.g. to specify the name of the color.

Author

Otto Milvang, modified 24.07.92 Knut-Andreas Lie (allow comments).

Revised

Svein Bře

Examples

 # xshow.map
 # Generate colortable with "mct xshow.map xshow.col"
 #
 # My private colortab
 # Pix       0 -> Red
 # Pix 1 - 254 -> Grayscale
 # Pix     255 -> Green
 0 65535 0 0
 1 0 0 0
 :
 254 65535 65535 65535
 255 0 65535 0

or:

 # xshow.map
 # Generate colortable with "mct xshow.map xshow.col"
 #
 # My private colortab
 0 65535 0 0           # red
 1 0 0 0               # black
 :                     # ->
 254 65535 65535 65535 # white
 255 0 65535 0         # green

Id

$Id: mct.c,v 1.35 1997/01/06 10:59:23 svein Exp $

mct