version 1, including all changes.
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perry |
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ppmtoilbm |
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!!!ppmtoilbm |
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NAME |
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SYNOPSIS |
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DESCRIPTION |
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OPTIONS |
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BUGS |
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REFERENCES |
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SEE ALSO |
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AUTHORS |
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---- |
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!!NAME |
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ppmtoilbm - convert a portable pixmap into an ILBM file |
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!!SYNOPSIS |
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__ppmtoilbm__ [[__-maxplanes__|__-mp__ ''N''] |
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[[__-fixplanes__|__-fp__ ''N''] |
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[[__-ham6__|__-ham8__] |
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[[__-dcbits__|__-dcplanes__r__g__b__]__ |
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[[__-normal__|__-hamif__|__-hamforce__|__-24if__|__-24force__| |
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-dcif__|__-dcforce__|__-cmaponly__]__ |
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[[__-ecs__|__-aga__] |
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[[__-compress__|__-nocompress__] [[__-cmethod__ |
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''type''] [[__-map__ppmfile__]__ [[__-savemem__] |
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[[__ppmfile__] |
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!!DESCRIPTION |
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Reads a portable pixmap as input. Produces an ILBM file as |
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output. Supported ILBM types are: |
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Normal ILBMs with 1-16 planes. |
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Amiga HAM with 3-16 planes. |
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24 bit. |
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Color map (BMHD + CMAP chunk only, nPlanes = |
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0). |
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Unofficial direct color. |
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1-16 planes for each color component. |
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Chunks written: |
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BMHD, CMAP, CAMG (only for HAM), BODY (not for colormap |
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files) unofficial DCOL chunk for direct color |
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ILBM |
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!!OPTIONS |
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Options marked with (*) can be prefixed with a |
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__-maxplanes | -mp n__ |
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(default 5, minimum 1, maximum 16) Maximum planes to write |
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in a normal ILBM. If the pixmap does not fit into |
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__-fixplanes | -fp n__ |
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(min 1, max 16) If a normal ILBM is written, it will have |
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exactly |
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__-hambits | -hamplanes n__ |
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(default 6, min 3, max 16) Select number of planes for HAM |
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picture. The current Amiga hardware supports 6 and 8 planes, |
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so for now you should only use this values. |
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__-normal (default)__ |
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Turns off -hamif/-24if/-dcif, -hamforce/-24force/-dcforce |
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and -cmaponly. Also sets compression type to |
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byterun1. |
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__-hamif (*)__ |
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__-24if (*)__ |
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__-dcif (*)__ |
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Write a HAM/24bit/direct color file if the pixmap does not |
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fit into |
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__-hamforce (*)__ |
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__-24force (*)__ |
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__-dcforce (*)__ |
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Write a HAM/24bit/direct color file. |
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__-dcbits | -dcplanes r g b__ |
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(default 5, min 1, max 16). Select number of bits for red, |
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green |
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__-ecs (default)__ |
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Shortcut for: -hamplanes 6 -maxplanes 5 |
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__-aga__ |
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__Shortcut for: -hamplanes 8 -maxplanes 8__ |
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__-ham6__ |
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__Shortcut for: -hamplanes 6 -hamforce__ |
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__-ham8__ |
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Shortcut for: -hamplanes 8 -hamforce |
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__-compress (*) (default)__ |
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__-cmethod none|byterun1__ |
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Compress the BODY chunk. The default compression method is |
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byterun1. Compression requires building the ILBM image in |
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memory; turning compression off allows stream-writing of the |
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image, but the resulting file will usually be 30% to 50% |
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larger. Another alternative is the -savemem option, this |
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will keep memory requirements for compression at a minimum, |
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but is very slow. |
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__-map ppmfile__ |
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Write a normal ILBM using the colors in |
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__-cmaponly__ |
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Write a colormap file: only BMHD and CMAP chunks, no BODY |
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chunk, nPlanes = 0. |
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__-savemem__ |
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See the -compress option. |
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!!BUGS |
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HAM pictures will always get a grayscale colormap; a real |
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color selection algorithm might give better results. On the |
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other hand, this allows row-by-row operation on HAM images, |
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and all HAM images of the same depth (no. of planes) share a |
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common colormap, which is useful for building HAM |
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animations. |
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!!REFERENCES |
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Amiga ROM Kernel Reference Manual - Devices (3rd Ed.) |
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Addison Wesley, ISBN 0-201-56775-X |
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!!SEE ALSO |
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ppm(5), ilbmtoppm(1) |
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!!AUTHORS |
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Copyright (C) 1989 by Jef Poskanzer. |
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Modified October 1993 by Ingo Wilken |
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(Ingo.Wilken@informatik.uni-oldenburg.de) |
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---- |
