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



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  gener-
       ates  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
       -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 the new color for that index.  Specify color as
                described for the ppm_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.



netpbm documentation             07 April 2004        Infotopam User Manual(0)