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ilbmtoppm - convert an ILBM file into a PPM image |
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ilbmtoppm [-ignore<chunkID>] [ -isham | -isnotham | -isehb | -isnotehb | -isdeep | -isnotdeep ] [-cmaponly] [-adjustcolors] [-transparent color] [-maskfile filename [-verbose] [ILBMfile] |
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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: |
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Normal ILBMs with 1-16 planes. |
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Amiga Extra_Halfbrite (EHB) |
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Amiga HAM with 3-16 planes. |
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24 bit. |
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Multiplatte (normal or HAM) pictures. |
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Color map (BMHD + CMAP chunk only, nPlanes = 0). |
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Unofficial direct color. 1-16 planes for each color component. |
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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. |
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-verbose |
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Give some information about the ILBM file. |
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-ignore chunkID |
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Skip a chunk. chunkID is the 4-letter IFF chunk identifier of the chunk to be skipped. |
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-isham | -isehb |
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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). |
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-cmaponly |
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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. |
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-adjustcolors |
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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. |
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The multipalette PCHG BigLineChanges and Huffman decompression code is untested. |
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Amiga ROM Kernel Reference Manual - Devices (3rd Ed.) Addison Wesley, ISBN 0-201-56775-X |
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ppmtoilbm(1), ppm(1) |
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Copyright (C) 1989 by Jef Poskanzer. Modified October 1993 by Ingo Wilken (Ingo.Wilken@informatik.uni-oldenburg.de) |