ilbmtoppm (1)
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.
"IFF"
"ILBM"
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
AUTHORS
Copyright (C) 1989 by Jef Poskanzer.
Modified October 1993 by Ingo Wilken (Ingo.Wilken@informatik.uni-oldenburg.de)
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