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Ilbmtoppm User Manual(0)                              Ilbmtoppm User Manual(0)

NAME
       ilbmtoppm - convert an ILBM file into a PPM image

SYNOPSIS
       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:

       o      Normal ILBMs with 1-16 planes.

       o      Amiga Extra_Halfbrite (EHB)

       o      Amiga HAM with 3-16 planes.

       o      24 bit.

       o      Multiplatte (normal or HAM) pictures.

       o      Color map (BMHD + CMAP chunk only, nPlanes = 0).

       o      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 rec-
       ognize.

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,  ilbm-
              toppm  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(5)

AUTHORS
       Copyright (C) 1989 by Jef Poskanzer.

       Modified October 1993 by Ingo Wilken (Ingo.Wilken@informatik.uni-olden-
       burg.de)

netpbm documentation            04 October 1993       Ilbmtoppm User Manual(0)
 

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Gedruckt am: 11.12.2017 06:34 GMT+0100 (2017-12-11T06:34:39+01:00)