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ilbmtoppm
Langue: en
Version: 04 October 1993 (fedora - 01/12/10)
Section: 1 (Commandes utilisateur)
NAME
ilbmtoppm - convert an ILBM file into a PPM imageSYNOPSIS
ilbmtoppm [-ignore<chunkID>] [ -isham | -isnotham | -isehb | -isnotehb | -isdeep | -isnotdeep ] [-cmaponly] [-adjustcolors] [-transparent color] [-maskfile filename [-verbose] [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).
- -cmaponly
- With this option, ilbmtoppm generates a PPM of the ILBM's color map, not the image itself.
ilbmtoppm does the same thing even without -cmaponly if the ILBM is a pure color map stream (it has a bitmap header with an nplanes value of zero or has no BODY 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)
Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre