Ubuntu Manpage: infotopam - convert Amiga .info icons to PAM

Provided by: netpbm_11.10.02-1build1_amd64

NAME

       infotopam - convert Amiga .info icons to PAM

SYNOPSIS

       infotopam [-forcecolor] [-numcolors numcolors] [-selected] [-verbose] [index color ...]  [filename]

       Minimum unique abbreviation of option is acceptable.  You may use double hyphens instead of single hyphen
       to  denote  options.  You may use white space in place of the equals sign to separate an option name from
       its value.

EXAMPLES

           $ infotopam amiga.info > amiga.first.pam

       Use the -selected option to convert the 'selected' version of the icon rather than the  regular  version.
       Here infotopam reads from Standard Input:

           infotopam -selected < amiga.info > amiga.second.pam

       Use -numcolors to change the colors.

           infotopam -numcolors 2 0 green 3 rgb:FF/00/00 icon.info > icon.pam

       Since  Amiga  monitors  do  not  use square pixels, some icons may appear squished.  Filtering the output
       through pamscale can fix this:

           $ infotopam squish.info | pamtopnm | pamscale -yscale 1.7 > normal.pnm

DESCRIPTION

       This program is part of Netpbm(1).

       infotopam converts an Amiga .info (icon) image to a  PAM  image.   infotopam  reads  a  .info  file  from
       filename, or from Standard Input if you do not specify a file name, and writes the converted PAM image to
       Standard Output.

       infotopam  handles 1- and 2 bit-plane icons.  If the .info icon has only 1 bit-plane, infotopam generates
       a black and white PAM image; otherwise it generates a color PAM image.   In  the  latter  case,  you  can
       choose the colors or keep the original Amiga standard colors.  You can force infotopam to produce a color
       PAM with 1 bit-plane input with a -forcecolor option.

OPTIONS

In addition to the options common to all programs based on libnetpbm (most notably -quiet, see Common
Options ), infotopam recognizes the following command line options:

-numcolors numcolors
This causes the program to change the colors in the conversion. A
2-bit-plane Amiga .icon image has four colors, numbered 0 through 3.
Those colors are as follows.

Blue (00, 55, AA)

White (FF, FF, FF)

Black (00, 00, 20)

Orange (FF, 8A, 00)

To specify the changes, specify the number of colors you are changing
as the argument of -numcolors and for each color, specify a pair
of command line arguments, the first being the color index 0 through 3
and the second being the color to substitute. Specify the color
(color) as described for the

argument of the pnm_parsecolor() library routine .

These arguments go before the input file name argument,
if any. This is an unusual syntax for a Netpbm program.

-selected

An Amiga .info image contains two versions of the icon: one for
regular display and one to display when the thing represented by
the icon is selected. By default, infotopam converts the
regular icon, but this option causes it to convert the selected icon
instead.

-forcecolor

This causes infotopam to convert 1 bit-plane icons to color
PAM images instead of black and white. The colors are the index 2
color for black and the index 1 color for white.

-verbose

This causes infotopam to issue informational messages about
the conversion process.

This option was new in Netpbm 11.06 (March 2024).

All options can be abbreviated to their shortest unique prefix.

NOTES

       Thanks to the following people on comp.sys.amiga.programmer for tips and pointers on  decoding  the  info
       file format:

       •      Ben Hutchings

       •      Thomas Richter

       •      Kjetil Svalastog Matheussen

       •      Anders Melchiorsen

       •      Dirk Stoecker

       •      Ronald V.D.

       The format of the Amiga .info file is as follows:

           DiskObject header            78 bytes
           Optional DrawerData header   56 bytes
           First icon header            20 bytes
           First icon data              Varies
           Second icon header           20 bytes
           Second icon data             Varies

       The  DiskObject  header  contains,  among  other  things, the magic number (0xE310), the object width and
       height (inside the embedded Gadget header), and the version.

       Each icon header contains the icon width and height, which can be  smaller  than  the  object  width  and
       height, and the number of bit-planes.

       The icon data has the following format:

              BIT-PLANE planes, each with HEIGHT rows of (WIDTH
                  +15) / 16 * 2 bytes length.

       So if you have a 9x3x2 icon, the icon data will look like this:

           aaaa aaaa a000 0000
           aaaa aaaa a000 0000
           aaaa aaaa a000 0000
           bbbb bbbb b000 0000
           bbbb bbbb b000 0000
           bbbb bbbb b000 0000

       where  a is a bit for the first bit-plane, b is a bit for the second bit-plane, and 0 is padding.  Thanks
       again to Ben Hutchings for his very helpful post!

HISTORY

       infotopam was new in Netpbm 10.22 (April 2004).

LIMITATIONS

       infotopam currently only handles 1 and 2 bit-plane icons.

       There is no pamtoinfo command, since the .info files contain a lot more than just icon data, and  mapping
       the colors would be difficult.

AUTHOR

       Copyright (C) 2000, 2004 by Richard Griswold.

DOCUMENT SOURCE

       This  manual  page was generated by the Netpbm tool 'makeman' from HTML source.  The master documentation
       is at

              http://netpbm.sourceforge.net/doc/infotopam.html

netpbm documentation                              22 March 2024                         Infotopam User Manual(1)