Open Source Software

ilbmtoppm(1)



NAME

   ilbmtoppm - convert an ILBM file into a portable pixmap

SYNOPSIS

   ilbmtoppm [-verbose] [-ignore<chunkID>] [-isham|-isehb] [-adjustcolors]
   [ILBMfile]

DESCRIPTION

   Reads an IFF ILBM file as input.  Produces a portable pixmap as output.
   Supported ILBM types are:

   Normal ILBMs with 1-16 planes.

   Amiga Extra_Halfbrite (EHB)

   Amiga HAM with 3-16 planes.

   24 bit.

   Multiplatte (normal or HAM) pictures.

   Color map (BMHD + CMAP chunk only, nPlanes = 0).

   Unofficial direct color.
          1-16 planes for each color component.

   Chunks used:
          BMHD,  CMAP,  CAMG  (only  HAM  &  EHB  flags  used), PCHG, BODY
          unofficial DCOL chunk to identify direct color ILBM

   Chunks ignored:
          GRAB, DEST, SPRT, CRNG, CCRT, CLUT, DPPV, DRNG, EPSF

   Other chunks (ignored but displayed in verbose mode):
          NAME, AUTH, (c), ANNO, DPI

   Unknown chunks are skipped.

OPTIONS

   -verbose
          Give some information about the ILBM file.

   -ignore <chunkID>
          Skip a chunk.  <chunkID> is the 4-letter IFF chunk identifier of
          the chunk to be skipped.

   -isham | -isehb
          Treat  the  input file as a HAM or Extra_Halfbrite picture, even
          if these flags or not set in the CAMG chunk (or if there  is  no
          CAMG chunk).

   -adjustcolors
          If  all  colors  in  the  CMAP  have  a  value  of less then 16,
          ilbmtoppm assumes a 4-bit colormap and gives  a  warning.   With
          this option the colormap is scaled to 8 bits.

BUGS

   The  multipalette PCHG BigLineChanges and Huffman decompression code is
   untested.

REFERENCES

   Amiga ROM Kernel Reference Manual - Devices (3rd Ed.)
   Addison Wesley, ISBN 0-201-56775-X

SEE ALSO

   ppm(5), ppmtoilbm(1)

AUTHORS

   Copyright (C) 1989 by Jef Poskanzer.
   Modified  October  1993  by  Ingo  Wilken  (Ingo.Wilken@informatik.uni-
   oldenburg.de)

                            04 October 1993                   ilbmtoppm(1)



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