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| Viewing file: Select action/file-type: infotopamUpdated: 07 April 2004 NAMEinfotopam - convert Amiga .info icons to PAM SYNOPSISinfotopam [-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. EXAMPLESBy 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
  DESCRIPTIONThis program is part of Netpbm. 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
 All options can be abbreviated to their shortest unique prefix. SEE ALSONOTESThanks to the following people on comp.sys.amiga.programmer for tips and pointers on decoding the info file format: 
 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: 
 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! HISTORYinfotopam was new in Netpbm 10.22 (April 2004). LIMITATIONSinfotopam 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. AUTHORCopyright (C) 2000, 2004 by Richard Griswold. Table Of Contents |