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Infotopam User Manual(0)						 Infotopam User Manual(0)

       infotopam - convert Amiga .info icons to PAM

       infotopam [-forcecolor] [-numcolors numcolors] [-selected] [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.

       By default, infotopam converts the first icon in a .info file:

	   infotopam amiga.info > amiga.first.pam

       Use the -selected option to convert the second icon in a .info file.  Here infotopam reads
       from Standard Input:

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

       Use the -forcecolor option to force color conversion for a 1 bit-plane .info file:

	   infotopam -forcecolor bw.info > bw.pam

       Use -numcolors to override colors for indexes 0 and 3.  Notice the two ways to specify the

	   infotopam -numcolors 2 0 green 3 #FF0000 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

       This program is part of Netpbm(1)

       infotopam converts an Amiga .info (icon) file 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 currently handles 1 and 2 bit-plane icons.  If the .info icon only  has  1  bit-
       plane,  infotopam  generates  a	bitmap	(black&white) PAM image; otherwise it generates a
       color PAM image.  You can force infotopam to convert  1	bit-plane  images  to  color  PAM
       images by using the -forcecolor option.


	      Forces infotopam to convert 1 bit-plane icons to color PAM
		images instead of bitmap PAM images.  infotopam uses the index 2
		color for black and the index 1 color for white (more on this

       -numcolors numcolors

	      Tells infotopam how many colors to override.  Pixels in the
		Amiga .info files are assigned an index value rather than a specific color.
		The standard colors for a 2 bit-plane icon are:

		  Index 0:  Blue   (00, 55, AA)
		  Index 1:  White  (FF, FF, FF)
		  Index 2:  Black  (00, 00, 20)
		  Index 3:  Orange (FF, 8A, 00)

	      To override the colors, first specify how many colors to override using
		-numcolors, then specify an (index color) pair for each color
		you want to override, where index is a value from 0 to 3 and
		color the the new color for that index.  Specify color as
		described for the ppm_parsecolor()   argument <libppm.html#colorname> .


	      Tells infotopam to convert the selected (second) icon instead of
		the normal (first) icon.  Each Amiga .info icon file contains two icon
		images.  The first image is the normal, unselected icon, and the second
		image is the selected icon.  By default infotopam converts the first
		icon.  You can tell infotopam to convert the second icon by using the
		-selected option.

       All options can be abbreviated to their shortest unique prefix.




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

       o      Ben Hutchings

       o      Thomas Richter

       o      Kjetil Svalastog Matheussen

       o      Anders Melchiorsen

       o      Dirk Stoecker

       o      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!

       infotopam was new in Netpbm 10.22 (April 2004).

       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.

       Copyright (C) 2000, 2004 by Richard Griswold.

netpbm documentation			  07 April 2004 		 Infotopam User Manual(0)
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