ilbmtoppm man page on YellowDog

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Ilbmtoppm User Manual(0)			      Ilbmtoppm User Manual(0)

NAME
       ilbmtoppm - convert an ILBM file into a PPM image

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

DESCRIPTION
       This program is part of Netpbm(1).

       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 component.

       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,
       DPPV, DRNG, EPSF.  It ignores, but displays  in	verbose	 mode,	these:
       NAME, AUTH, (c), ANNO, DPI.  It skips chunks whose type it doesn't rec‐
       ognize.

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 are 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, ilbm‐
	      toppm 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(1), ppm(1)

AUTHORS
       Copyright (C) 1989 by Jef Poskanzer.

       Modified October 1993 by Ingo Wilken (Ingo.Wilken@informatik.uni-olden‐
       burg.de)

netpbm documentation		04 October 1993	      Ilbmtoppm User Manual(0)
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