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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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