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

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 ⟨index.html#commonoptions⟩ ), 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
⟨libnetpbm_image.html#colorname⟩ .

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