SYNOPSIS

pgmtoimgv [-h] [-v] [-4] [-t title] [-n notefile] [-{c|m|u}] [in [out]]

DESCRIPTION

pgmtoimgv is a simple filter for converting Portable Graymaps to grayscale Pilot Image Viewer pdb files. The input pgm file must use the following palette unless you specify the -4 switch:

        P3
        4 1
        255
          0   0   0
         85  85  85
        170 170 170
        255 255 255

if you specify -4, then your grayscale image must use this palette:

        P3
        16 1
        255
          0   0   0
         17  17  17
         34  34  34
         51  51  51
         68  68  68
         85  85  85
        102 102 102
        119 119 119
        136 136 136
        153 153 153
        170 170 170
        187 187 187
        204 204 204
        221 221 221
        238 238 238
        255 255 255

If your PGM file doesn't use one of these palettes, use ppmquant(1) to convert your palette.

If an image's width is not a multiple of 16 pixels, enough extra white pixels will be added at the right side to ensure alignment. Images will be padded, with white pixels, to a width and height of 160 if needed.

OPTIONS

-h

Display a short summary of the command line options and exit.

-v

Display the version and exit.

-4

Use 4 bit grayscale (16 shades of gray).

-t title

Specify the title of the image (up to 31 characters).

-n notefile

Specify the note file. No note is attached to the image by default.

-c

Produce a compressed image.

-m

Produce a compressed image if it is smaller than the uncompressed version. This is the default compression mode.

-u

Produce an uncompressed image.

in

The input file. The default is the standard input.

out

The output file. The default is the standard output.

LICENSE

Copyright (C) 1997,1998 Eric A. Howe <http://www.trends.net/~mu>.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.