pngtopnm(1)           AMIGA (06 June 1995)            pngtopnm(1)



     NAME
          pngtopnm - convert a Portable Network Graphics file into a
          portable anymap

     SYNOPSIS
          pngtopnm [-verbose] [-text] [-alpha|-mix] [pngfile]

     DESCRIPTION
          Reads a Portable Network Graphics as input.  Produces a
          portable anymap as output.  The type of the output file
          depends on the input file - if it's black & white, a pbm
          file is written, else if it's grayscale a pgm file, else a
          ppm file.

     OPTIONS
          -verbose
               Display the format of the input file and the type of
               the output file.

          -alpha
               Output the alpha channel or transparency mask of the
               image. The result is either a pbm file or pgm file,
               depeding on whether different levels of transparency
               appear.

          -mix Compose the image with the transparency or alpha mask
               against a black background.

          -text
               Print tEXt, zTXt and tIME chunks to stderr.

          All flags can be abbreviated to their shortest unique
          prefix.

     SEE ALSO
          pnmtopng(1), ptot(1), pnm(5)

     BUGS
          Due the fact that PNM files only include image data, it is
          not possible to preserve extra data (e.g. comments) stored
          with an image file. Instead of pngtopnm|pnmtoxxx, a specific
          converter should be used, if available. E.g.  ptot (PNG to
          TIFF conversion), etc. (This is not really a bug in
          pngtopnm, more a general problem with intermediate formats.)

          Information about scaling is not used.  sBIT chunks are
          ignored.

          -mix should use the background color, if specified, instead
          of black.

     AUTHOR



     Page 1                                          (printed 7/15/95)






     pngtopnm(1)           AMIGA (06 June 1995)            pngtopnm(1)



          Copyright (C) 1995 by Alexander Lehmann.






















































     Page 2                                          (printed 7/15/95)