ilbmtoppm
Section: User Commands (1)
Updated: 04 October 1993
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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)
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- OPTIONS
-
- BUGS
-
- REFERENCES
-
- SEE ALSO
-
- AUTHORS
-
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