{ "mode": "man", "parameter": "ppmtoilbm", "section": "1", "url": "https://www.chedong.com/phpMan.php/man/ppmtoilbm/1/json", "generated": "2026-05-30T06:08:13Z", "synopsis": "ppmtoilbm [-maxplanes|-mp N] [-fixplanes|-fp N] [-ham6|-ham8] [-dcbits|-dcplanesrgb] [-nor‐‐\nmal|-hamif|-hamforce|-24if|-24force| -dcif|-dcforce|-cmaponly] [-ecs|-aga] [-compress|-nocom‐‐\npress] [-cmethod type] [-mapppmfile] [-savemem] [ppmfile]", "sections": { "NAME": { "content": "ppmtoilbm - convert a portable pixmap into an ILBM file\n", "subsections": [] }, "SYNOPSIS": { "content": "ppmtoilbm [-maxplanes|-mp N] [-fixplanes|-fp N] [-ham6|-ham8] [-dcbits|-dcplanesrgb] [-nor‐‐\nmal|-hamif|-hamforce|-24if|-24force| -dcif|-dcforce|-cmaponly] [-ecs|-aga] [-compress|-nocom‐‐\npress] [-cmethod type] [-mapppmfile] [-savemem] [ppmfile]\n", "subsections": [] }, "DESCRIPTION": { "content": "Reads a portable pixmap as input. Produces an ILBM file as output. Supported ILBM types\nare:\n\nNormal ILBMs with 1-16 planes.\n\nAmiga HAM with 3-16 planes.\n\n24 bit.\n\nColor map (BMHD + CMAP chunk only, nPlanes = 0).\n\nUnofficial direct color.\n1-16 planes for each color component.\n\nChunks written:\nBMHD, CMAP, CAMG (only for HAM), BODY (not for colormap files) unofficial DCOL chunk\nfor direct color ILBM\n", "subsections": [] }, "OPTIONS": { "content": "Options marked with (*) can be prefixed with a \"no\", e.g. \"-nohamif\". All options can be ab‐\nbreviated to their shortest unique prefix.\n", "subsections": [ { "name": "-maxplanes | -mp n", "content": "(default 5, minimum 1, maximum 16) Maximum planes to write in a normal ILBM. If the\npixmap does not fit into planes, ppmtoilbm writes a HAM file (if -hamif is used),\na 24bit file (if -24if is used) or a direct color file (if -dcif is used) or aborts\nwith an error.\n" }, { "name": "-fixplanes | -fp n", "content": "(min 1, max 16) If a normal ILBM is written, it will have exactly planes.\n" }, { "name": "-hambits | -hamplanes n", "content": "(default 6, min 3, max 16) Select number of planes for HAM picture. The current Amiga\nhardware supports 6 and 8 planes, so for now you should only use this values.\n" }, { "name": "-normal (default)", "content": "Turns off -hamif/-24if/-dcif, -hamforce/-24force/-dcforce and -cmaponly. Also sets\ncompression type to byterun1.\n" }, { "name": "-hamif", "content": "" }, { "name": "-24if", "content": "" }, { "name": "-dcif", "content": "Write a HAM/24bit/direct color file if the pixmap does not fit into \nplanes.\n" }, { "name": "-hamforce", "content": "" }, { "name": "-24force", "content": "" }, { "name": "-dcforce", "content": "Write a HAM/24bit/direct color file.\n" }, { "name": "-dcbits | -dcplanes r g b", "content": "(default 5, min 1, max 16). Select number of bits for red, green & blue in a direct\ncolor ILBM.\n" }, { "name": "-ecs (default)", "content": "Shortcut for: -hamplanes 6 -maxplanes 5\n" }, { "name": "-aga", "content": "" }, { "name": "Shortcut for: -hamplanes 8 -maxplanes 8", "content": "" }, { "name": "-ham6", "content": "" }, { "name": "Shortcut for: -hamplanes 6 -hamforce", "content": "" }, { "name": "-ham8", "content": "" }, { "name": "-compress", "content": "" }, { "name": "-cmethod none|byterun1", "content": "Compress the BODY chunk. The default compression method is byterun1. Compression re‐\nquires building the ILBM image in memory; turning compression off allows stream-writ‐\ning of the image, but the resulting file will usually be 30% to 50% larger. Another\nalternative is the -savemem option, this will keep memory requirements for compression\nat a minimum, but is very slow.\n" }, { "name": "-map ppmfile", "content": "Write a normal ILBM using the colors in as the colormap. The colormap file\nalso determines the number of planes, a -maxplanes or -fixplanes option is ignored.\n" }, { "name": "-cmaponly", "content": "Write a colormap file: only BMHD and CMAP chunks, no BODY chunk, nPlanes = 0.\n" }, { "name": "-savemem", "content": "See the -compress option.\n" } ] }, "BUGS": { "content": "HAM pictures will always get a grayscale colormap; a real color selection algorithm might\ngive better results. On the other hand, this allows row-by-row operation on HAM images, and\nall HAM images of the same depth (no. of planes) share a common colormap, which is useful for\nbuilding HAM animations.\n", "subsections": [] }, "REFERENCES": { "content": "Amiga ROM Kernel Reference Manual - Devices (3rd Ed.)\nAddison Wesley, ISBN 0-201-56775-X\n", "subsections": [] }, "SEE ALSO": { "content": "ppm(5), ilbmtoppm(1)\n", "subsections": [] }, "AUTHORS": { "content": "Copyright (C) 1989 by Jef Poskanzer.\nModified October 1993 by Ingo Wilken (Ingo.Wilken@informatik.uni-oldenburg.de)\n\n\n\n\n31 October 1993 ppmtoilbm(1)", "subsections": [] } }, "summary": "ppmtoilbm - convert a portable pixmap into an ILBM file", "flags": [ { "flag": "", "long": null, "arg": null, "description": "(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." }, { "flag": "", "long": null, "arg": null, "description": "(min 1, max 16) If a normal ILBM is written, it will have exactly planes." }, { "flag": "", "long": null, "arg": null, "description": "(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." }, { "flag": "", "long": null, "arg": null, "description": "Turns off -hamif/-24if/-dcif, -hamforce/-24force/-dcforce and -cmaponly. Also sets compression type to byterun1." }, { "flag": "", "long": null, "arg": null, "description": "" }, { "flag": "", "long": null, "arg": null, "description": "" }, { "flag": "", "long": null, "arg": null, "description": "Write a HAM/24bit/direct color file if the pixmap does not fit into planes." }, { "flag": "", "long": null, "arg": null, "description": "" }, { "flag": "", "long": null, "arg": null, "description": "" }, { "flag": "", "long": null, "arg": null, "description": "Write a HAM/24bit/direct color file." }, { "flag": "", "long": null, "arg": null, "description": "(default 5, min 1, max 16). Select number of bits for red, green & blue in a direct color ILBM." }, { "flag": "", "long": null, "arg": null, "description": "Shortcut for: -hamplanes 6 -maxplanes 5" }, { "flag": "", "long": null, "arg": null, "description": "" }, { "flag": "", "long": null, "arg": null, "description": "" }, { "flag": "", "long": null, "arg": null, "description": "" }, { "flag": "", "long": null, "arg": null, "description": "" }, { "flag": "", "long": null, "arg": null, "description": "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." }, { "flag": "", "long": null, "arg": null, "description": "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." }, { "flag": "", "long": null, "arg": null, "description": "Write a colormap file: only BMHD and CMAP chunks, no BODY chunk, nPlanes = 0." }, { "flag": "", "long": null, "arg": null, "description": "See the -compress option." } ], "examples": [], "see_also": [ { "name": "ppm", "section": "5", "url": "https://www.chedong.com/phpMan.php/man/ppm/5/json" }, { "name": "ilbmtoppm", "section": "1", "url": "https://www.chedong.com/phpMan.php/man/ilbmtoppm/1/json" } ] }