Manual: infotopam

Infotopam User Manual(1)			   General Commands Manual			    Infotopam User Manual(1)

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  info‐
       topam 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 -force‐
       color option.

OPTIONS
       In addition to the options common to all programs based on libnetpbm (most notably -quiet, see  Common Options ), in‐
       fotopam 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.

       0

	      Blue   (00, 55, AA)

       1

	      White  (FF, FF, FF)

       2

	      Black  (00, 00, 20)

       3

	      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.

SEE ALSO
       pam(1) pamtopnm(1) pamscale(1)

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)