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)