ilbmtoppm

   Updated: 04 October 1993
   Table Of Contents

NAME

   ilbmtoppm - convert an ILBM file into a PPM image

SYNOPSIS

   ilbmtoppm  [-verbose] [-ignore] [-isham|-isehb] [-ad-
justcolors]
   [ILBMfile]

DESCRIPTION

   This program is part of Netpbm.

   ilbmtoppm  reads an IFF ILBM file as input and produces a  PPM
image as
   output. ilbmtoppm can handle the following ILBM types:
     * 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 compo-
nent.

   ilbmtoppm uses these ILBM chunks: BMHD, CMAP, CAMG (only HAM &
EHB flags
   used),  PCHG,  BODY	unofficial  DCOL chunk to identify direct
color ILBM. It
   ignores these chunks: GRAB, DEST, SPRT, CRNG, CCRT, CLUT,  DP-
PV, DRNG, EPSF.
   It  ignores,	 but displays in verbose mode, these: NAME, AUTH,
(c), ANNO, DPI.
   It skips chunks whose type it doesn't recognize.

OPTIONS

   -verbose
	  Give some information about the ILBM file.
   -ignore chunkID
	  Skip a chunk. chunkID is the 4-letter IFF chunk identi-
fier of the
	  chunk to be skipped.
   -isham | -isehb
	  Treat	 the  input file as a HAM or Extra_Halfbrite pic-
ture, 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.



LIMITATIONS

   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

   ppmtoilbm, ppm

AUTHORS

   Copyright (C) 1989 by Jef Poskanzer.

   Modified October 1993 by Ingo Wilken
   (Ingo.Wilken@informatik.uni-oldenburg.de)
     _________________________________________________________________



Table Of Contents

     * NAME
     * SYNOPSIS
     * DESCRIPTION
     * OPTIONS
     * LIMITATIONS
     * REFERENCES
     * SEE ALSO
     * AUTHORS

UNIX/Linux commands referenced on this page:

1. convert
2. file
3. as
4. identify
5. less
6. ppmtoilbm