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ppmtoilbm !!!ppmtoilbm NAME SYNOPSIS DESCRIPTION OPTIONS BUGS REFERENCES SEE ALSO AUTHORS ---- !!NAME ppmtoilbm - convert a portable pixmap into an ILBM file !!SYNOPSIS __ppmtoilbm__ [[__-maxplanes__|__-mp__ ''N''] [[__-fixplanes__|__-fp__ ''N''] [[__-ham6__|__-ham8__] [[__-dcbits__|__-dcplanes__r__g__b__]__ [[__-normal__|__-hamif__|__-hamforce__|__-24if__|__-24force__| -dcif__|__-dcforce__|__-cmaponly__]__ [[__-ecs__|__-aga__] [[__-compress__|__-nocompress__] [[__-cmethod__ ''type''] [[__-map__ppmfile__]__ [[__-savemem__] [[__ppmfile__] !!DESCRIPTION Reads a portable pixmap as input. Produces an ILBM file as output. Supported ILBM types are: Normal ILBMs with 1-16 planes. Amiga HAM with 3-16 planes. 24 bit. Color map (BMHD + CMAP chunk only, nPlanes = 0). Unofficial direct color. 1-16 planes for each color component. Chunks written: BMHD, CMAP, CAMG (only for HAM), BODY (not for colormap files) unofficial DCOL chunk for direct color ILBM !!OPTIONS Options marked with (*) can be prefixed with a __-maxplanes | -mp n__ (default 5, minimum 1, maximum 16) Maximum planes to write in a normal ILBM. If the pixmap does not fit into __-fixplanes | -fp n__ (min 1, max 16) If a normal ILBM is written, it will have exactly __-hambits | -hamplanes n__ (default 6, min 3, max 16) Select number of planes for HAM picture. The current Amiga hardware supports 6 and 8 planes, so for now you should only use this values. __-normal (default)__ Turns off -hamif/-24if/-dcif, -hamforce/-24force/-dcforce and -cmaponly. Also sets compression type to byterun1. __-hamif (*)__ __-24if (*)__ __-dcif (*)__ Write a HAM/24bit/direct color file if the pixmap does not fit into __-hamforce (*)__ __-24force (*)__ __-dcforce (*)__ Write a HAM/24bit/direct color file. __-dcbits | -dcplanes r g b__ (default 5, min 1, max 16). Select number of bits for red, green __-ecs (default)__ Shortcut for: -hamplanes 6 -maxplanes 5 __-aga__ __Shortcut for: -hamplanes 8 -maxplanes 8__ __-ham6__ __Shortcut for: -hamplanes 6 -hamforce__ __-ham8__ Shortcut for: -hamplanes 8 -hamforce __-compress (*) (default)__ __-cmethod none|byterun1__ Compress the BODY chunk. The default compression method is byterun1. Compression requires building the ILBM image in memory; turning compression off allows stream-writing of the image, but the resulting file will usually be 30% to 50% larger. Another alternative is the -savemem option, this will keep memory requirements for compression at a minimum, but is very slow. __-map ppmfile__ Write a normal ILBM using the colors in __-cmaponly__ Write a colormap file: only BMHD and CMAP chunks, no BODY chunk, nPlanes = 0. __-savemem__ See the -compress option. !!BUGS HAM pictures will always get a grayscale colormap; a real color selection algorithm might give better results. On the other hand, this allows row-by-row operation on HAM images, and all HAM images of the same depth (no. of planes) share a common colormap, which is useful for building HAM animations. !!REFERENCES Amiga ROM Kernel Reference Manual - Devices (3rd Ed.) Addison Wesley, ISBN 0-201-56775-X !!SEE ALSO ppm(5), ilbmtoppm(1) !!AUTHORS Copyright (C) 1989 by Jef Poskanzer. Modified October 1993 by Ingo Wilken (Ingo.Wilken@informatik.uni-oldenburg.de) ----
4 pages link to
ppmtoilbm(1)
:
ilbmtoppm(1)
pbmfilters(1)
Man1p
ppm(5)
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