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/* $Header: /cvs/maptools/cvsroot/libtiff/tools/rasterfile.h,v 1.3.2.1 2010-06-08 18:50:44 bfriesen Exp $ */
/*
* Description of header for files containing raster images
*/
struct rasterfile {
char ras_magic[4]; /* magic number */
long ras_width; /* width (pixels) of image */
long ras_height; /* height (pixels) of image */
long ras_depth; /* depth (1, 8, or 24 bits) of pixel */
long ras_length; /* length (bytes) of image */
long ras_type; /* type of file; see RT_* below */
long ras_maptype; /* type of colormap; see RMT_* below */
long ras_maplength; /* length (bytes) of following map */
/* color map follows for ras_maplength bytes, followed by image */
};
#define RAS_MAGIC "\x59\xa6\x6a\x95"
#define RAS_MAGIC_INV "\x95\x6a\xa6\x59"
/* Sun supported ras_type's */
#define RT_OLD 0 /* Raw pixrect image in 68000 byte order */
#define RT_STANDARD 1 /* Raw pixrect image in 68000 byte order */
#define RT_BYTE_ENCODED 2 /* Run-length compression of bytes */
#define RT_EXPERIMENTAL 0xffff /* Reserved for testing */
/* Sun registered ras_maptype's */
#define RMT_RAW 2
/* Sun supported ras_maptype's */
#define RMT_NONE 0 /* ras_maplength is expected to be 0 */
#define RMT_EQUAL_RGB 1 /* red[ras_maplength/3],green[],blue[] */
/*
* NOTES:
* Each line of the image is rounded out to a multiple of 16 bits.
* This corresponds to the rounding convention used by the memory pixrect
* package (/usr/include/pixrect/memvar.h) of the SunWindows system.
* The ras_encoding field (always set to 0 by Sun's supported software)
* was renamed to ras_length in release 2.0. As a result, rasterfiles
* of type 0 generated by the old software claim to have 0 length; for
* compatibility, code reading rasterfiles must be prepared to compute the
* true length from the width, height, and depth fields.
*/
/*
* Local Variables:
* mode: c
* c-basic-offset: 8
* fill-column: 78
* End:
*/
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