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