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/* RCSid: $Id$ */ |
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/* @(#)rasterfile.h 1.11 89/08/21 SMI */ |
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/* |
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* Description of header for files containing raster images |
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*/ |
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#ifndef _rasterfile_h |
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#define _rasterfile_h |
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struct rasterfile { |
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int ras_magic; /* magic number */ |
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int ras_width; /* width (pixels) of image */ |
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int ras_height; /* height (pixels) of image */ |
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int ras_depth; /* depth (1, 8, or 24 bits) of pixel */ |
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int ras_length; /* length (bytes) of image */ |
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int ras_type; /* type of file; see RT_* below */ |
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int ras_maptype; /* type of colormap; see RMT_* below */ |
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int ras_maplength; /* length (bytes) of following map */ |
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/* color map follows for ras_maplength bytes, followed by image */ |
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}; |
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#define RAS_MAGIC 0x59a66a95 |
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/* Sun supported ras_type's */ |
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#define RT_OLD 0 /* Raw pixrect image in 68000 byte order */ |
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#define RT_STANDARD 1 /* Raw pixrect image in 68000 byte order */ |
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#define RT_BYTE_ENCODED 2 /* Run-length compression of bytes */ |
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#define RT_FORMAT_RGB 3 /* XRGB or RGB instead of XBGR or BGR */ |
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#define RT_FORMAT_TIFF 4 /* tiff <-> standard rasterfile */ |
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#define RT_FORMAT_IFF 5 /* iff (TAAC format) <-> standard rasterfile */ |
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#define RT_EXPERIMENTAL 0xffff /* Reserved for testing */ |
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/* Sun registered ras_maptype's */ |
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#define RMT_RAW 2 |
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/* Sun supported ras_maptype's */ |
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#define RMT_NONE 0 /* ras_maplength is expected to be 0 */ |
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#define RMT_EQUAL_RGB 1 /* red[ras_maplength/3],green[],blue[] */ |
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/* |
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* NOTES: |
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* Each line of the image is rounded out to a multiple of 16 bits. |
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* This corresponds to the rounding convention used by the memory pixrect |
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* package (/usr/include/pixrect/memvar.h) of the SunWindows system. |
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* The ras_encoding field (always set to 0 by Sun's supported software) |
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* was renamed to ras_length in release 2.0. As a result, rasterfiles |
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* of type 0 generated by the old software claim to have 0 length; for |
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* compatibility, code reading rasterfiles must be prepared to compute the |
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* true length from the width, height, and depth fields. |
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*/ |
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#endif /*!_rasterfile_h*/ |
