# ppmtoilbm(1) - man - phpMan [ppmtoilbm(1)](https://www.chedong.com/phpMan.php/man/ppmtoilbm/1/markdown) General Commands Manual [ppmtoilbm(1)](https://www.chedong.com/phpMan.php/man/ppmtoilbm/1/markdown) ## 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**]** [**-nor**‐‐ **mal**|**-hamif**|**-hamforce**|**-24if**|**-24force**| -dcif**|**-dcforce**|**-cmaponly**]** [**-ecs**|**-aga**] [**-compress**|**-nocom**‐‐ **press**] [**-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 "no", e.g. "-nohamif". All options can be ab‐ breviated to their shortest unique prefix. ### -maxplanes | -mp n (default 5, minimum 1, maximum 16) Maximum planes to write in a normal ILBM. If the pixmap does not fit into planes, ppmtoilbm writes a HAM file (if -hamif is used), a 24bit file (if -24if is used) or a direct color file (if -dcif is used) or aborts with an error. ### -fixplanes | -fp n (min 1, max 16) If a normal ILBM is written, it will have exactly planes. ### -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 planes. ### -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 & blue in a direct color ILBM. ### -ecs (default) Shortcut for: -hamplanes 6 -maxplanes 5 ### -aga ### Shortcut for: -hamplanes 8 -maxplanes 8 ### -ham6 ### Shortcut for: -hamplanes 6 -hamforce ### -ham8 ### -compress ### -cmethod none|byterun1 Compress the BODY chunk. The default compression method is byterun1. Compression re‐ quires building the ILBM image in memory; turning compression off allows stream-writ‐ ing 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 as the colormap. The colormap file also determines the number of planes, a -maxplanes or -fixplanes option is ignored. ### -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)](https://www.chedong.com/phpMan.php/man/ppm/5/markdown), [ilbmtoppm(1)](https://www.chedong.com/phpMan.php/man/ilbmtoppm/1/markdown) ## AUTHORS Copyright (C) 1989 by Jef Poskanzer. Modified October 1993 by Ingo Wilken () 31 October 1993 [ppmtoilbm(1)](https://www.chedong.com/phpMan.php/man/ppmtoilbm/1/markdown)