NAME

       infotopam - convert Amiga .info icons to PAM

SYNOPSIS

       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.

EXAMPLES

       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 color:

           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

DESCRIPTION

       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.

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:

       -forcecolor

              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
                below).

       -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 new color for that index.  Specify color as
                described for the pnm_parsecolor()   argument .

       -selected

              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.

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                              07 April 2004                         Infotopam User Manual(1)