ilbmtoppm - convert an ILBM file into a portable pixmap
ilbmtoppm [-verbose]
[-ignore<chunkID>] [-isham|-isehb]
[-adjustcolors] [ILBMfile]
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.
- -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.
The multipalette PCHG BigLineChanges and Huffman decompression
code is untested.
Amiga ROM Kernel Reference Manual - Devices (3rd Ed.)
Addison Wesley, ISBN 0-201-56775-X
Copyright (C) 1989 by Jef Poskanzer.
Modified October 1993 by Ingo Wilken
(Ingo.Wilken@informatik.uni-oldenburg.de)