pgmtoppm(1)pgmtoppm(1)NAMEpgmtoppm - colorize a portable graymap into a portable pixmap
SYNOPSISpgmtoppm colorspec [pgmfile]
pgmtoppm colorspec1-colorspec2 [pgmfile]
pgmtoppm-map mapfile [pgmfile]
DESCRIPTION
Reads a portable graymap as input. Colorizes it by multiplying the the
gray values by specified color or colors, and produces a portable
pixmap as output.
If only one color is specified, black in the pgm file stays black and
white in the pgm file turns into the specified color in the ppm file.
If two colors (separated by a dash) are specified, then black gets
mapped to the first color and white gets mapped to the second.
The color can be specified in five ways:
o A name, assuming that a pointer to an X11-style color names file
was compiled in.
o An X11-style hexadecimal specifier: rgb:r/g/b, where r g and b
are each 1- to 4-digit hexadecimal numbers.
o An X11-style decimal specifier: rgbi:r/g/b, where r g and b are
floating point numbers between 0 and 1.
o For backwards compatibility, an old-X11-style hexadecimal num‐
ber: #rgb, #rrggbb, #rrrgggbbb, or #rrrrggggbbbb.
o For backwards compatibility, a triplet of numbers separated by
commas: r,g,b, where r g and b are floating point numbers
between 0 and 1. (This style was added before MIT came up with
the similar rgbi style.)
Also, the -map flag lets you specify an entire colormap to be used.
The mapfile is just a ppm file; it can be any shape, all that matters
is the colors in it and their order. In this case, black gets mapped
into the first color in the map file, and white gets mapped to the
last.
SEE ALSOrgb3toppm(1), ppmtopgm(1), ppmtorgb3(1), ppm(5), pgm(5)AUTHOR
Copyright (C) 1991 by Jef Poskanzer.
11 January 1991 pgmtoppm(1)
