Codex

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)
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Amiga HAM with 3-16 planes.
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: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 usedBMHD, CMAP, CAMG (only HAM & EHB flags used), PCHG, BODY unofficial DCOL chunk to identify direct color ILBM
Chunks ignoredGRAB, 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 ([email protected])


Index

NAME

SYNOPSIS

DESCRIPTION

OPTIONS

BUGS

REFERENCES

SEE ALSO

AUTHORS


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