ilbmtoppm(1)

1Ilbmtoppm User Manual(0)                              Ilbmtoppm User Manual(0)
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NAME

6       ilbmtoppm - convert an ILBM file into a PPM image
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SYNOPSIS

10       ilbmtoppm  [-ignore<chunkID>] [ -isham | -isnotham | -isehb | -isnotehb
11       | -isdeep |  -isnotdeep  ]  [-cmaponly]  [-adjustcolors]  [-transparent
12       color] [-maskfile filename [-verbose] [ILBMfile]
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DESCRIPTION

16       This program is part of Netpbm(1).
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18       ilbmtoppm  reads  an IFF ILBM file as input and produces a PPM image as
19       output.  ilbmtoppm can handle the following ILBM types:
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23       ·      Normal ILBMs with 1-16 planes.
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25       ·      Amiga Extra_Halfbrite (EHB)
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27       ·      Amiga HAM with 3-16 planes.
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29       ·      24 bit.
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31       ·      Multiplatte (normal or HAM) pictures.
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33       ·      Color map (BMHD + CMAP chunk only, nPlanes = 0).
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35       ·      Unofficial direct color.  1-16 planes for each color component.
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38       ilbmtoppm uses these ILBM chunks: BMHD, CMAP,  CAMG  (only  HAM  &  EHB
39       flags  used), PCHG, BODY unofficial DCOL chunk to identify direct color
40       ILBM.  It ignores these chunks: GRAB, DEST,  SPRT,  CRNG,  CCRT,  CLUT,
41       DPPV,  DRNG,  EPSF.   It  ignores, but displays in verbose mode, these:
42       NAME, AUTH, (c), ANNO, DPI.  It skips chunks whose type it doesn't rec‐
43       ognize.
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OPTIONS

47       -verbose
48              Give some information about the ILBM file.
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51       -ignore chunkID
52              Skip  a  chunk.  chunkID is the 4-letter IFF chunk identifier of
53              the chunk to be skipped.
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56       -isham | -isehb
57              Treat the input file as a HAM or Extra_Halfbrite  picture,  even
58              if  these flags are not set in the CAMG chunk (or if there is no
59              CAMG chunk).
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62       -cmaponly
63              With this option, ilbmtoppm generates a PPM of the ILBM's  color
64              map, not the image itself.
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66              ilbmtoppm does the same thing even without -cmaponly if the ILBM
67              is a pure color map stream (it  has  a  bitmap  header  with  an
68              nplanes value of zero or has no BODY chunk.
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72       -adjustcolors
73              If  all  colors  in the CMAP have a value of less then 16, ilbm‐
74              toppm assumes a 4-bit colormap and gives a warning.   With  this
75              option the colormap is scaled to 8 bits.
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LIMITATIONS

81       The  multipalette PCHG BigLineChanges and Huffman decompression code is
82       untested.
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REFERENCES

86       Amiga ROM Kernel Reference Manual - Devices (3rd Ed.)  Addison  Wesley,
87       ISBN 0-201-56775-X
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AUTHORS

95       Copyright (C) 1989 by Jef Poskanzer.
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97       Modified October 1993 by Ingo Wilken (Ingo.Wilken@informatik.uni-olden‐
98       burg.de)
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102netpbm documentation            04 October 1993       Ilbmtoppm User Manual(0)