/* $Header: /cvs/libtiff/tools/rasterfile.h,v 1.3 2003/11/12 19:14:33 dron Exp $ */

#include "tiff.h"

/*

* Description of header for files containing raster images

*/

struct rasterfile {

char ras_magic[4]; /* magic number */

int32 ras_width; /* width (pixels) of image */

int32 ras_height; /* height (pixels) of image */

int32 ras_depth; /* depth (1, 8, or 24 bits) of pixel */

int32 ras_length; /* length (bytes) of image */

int32 ras_type; /* type of file; see RT_* below */

int32 ras_maptype; /* type of colormap; see RMT_* below */

int32 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.

*/