man pnmcat (Commandes) - concatenate portable anymaps
NAME
pnmcat - concatenate portable anymaps
SYNOPSIS
pnmcat
[-white|-black]
-leftright|-lr
[-jtop|-jbottom]
pnmfile pnmfile
...
pnmcat
[-white|-black]
-topbottom|-tb
[-jleft|-jright]
pnmfile pnmfile
...
DESCRIPTION
Reads portable anymaps as input. Concatenates them either left to right or top to bottom, and produces a portable anymap as output.
pamdice splits an image up into smaller ones.
pnmtile concatenates a single input image to itself repeatedly.
OPTIONS
If the anymaps are not all the same height (left-right) or width (top-bottom), the smaller ones have to be justified with the largest. By default, they get centered, but you can specify one side or the other with one of the -j* flags. So, -topbottom -jleft would stack the anymaps on top of each other, flush with the left edge.
The -white and -black flags specify what color to use to fill in the extra space when doing this justification. If neither is specified, the program makes a guess.
All flags can be abbreviated to their shortest unique prefix.
SEE ALSO
AUTHOR
Copyright (C) 1989 by Jef Poskanzer.