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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)
Man(1) output converted with
man2html and wrapped by fishsponge
This page was generated on Sat Sep 8 16:35:04 GMT 2007
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