Ilbmtoppm User Manual

Section: Misc. Reference Manual Pages (0)
Updated: 04 October 1993
Index Return to Main Contents

 

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 recognize.

 

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, ilbmtoppm 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-oldenburg.de)


 

Index

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
LIMITATIONS
REFERENCES
SEE ALSO
AUTHORS

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