ilbmtoppm [-verbose] [-ignore<chunkID>] [-isham|-isehb] [-adjustcolors] [ILBMfile]

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.

-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.

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 ()