/*
 *			L U T . H -- Look up table headers etc
 *
 *  Written  David Burgess
 *           Image Recognition Systems
 *           720 Birchwood Boulevard
 *           Birchwood Science Park
 *           Warrington
 *           Cheshire
 *           WA3 7PX
 *
 *	Copyright (c) and intellectual property rights Image Recognition Systems
 *
 *  Date:    30th January 1990
 *
 *  Modifications
 * 
 * 03-10-94	jimp	Added a definition of look_up_table
 *
 */
/*
 *	LUT types
 */
#define UNDEF_LUT			0
#define BRIGHT_LUT 1
#define FLUOR_LUT 2
#define SPEC_LUT 3

/*
 *	LUT file header info.
 */
#define LUT_MAGIC 19540
#define LUT_VSN	1
/*
 *	Status bit definitions
 */
#define EXACT		1	/* b0 LUT is exactly calculated */
#define FREEHAND	2	/* b1 LUT has been altered by freehand */
#define INVERT		4	/* b2 LUT is inverted */
#define CSTEPMASK 0xf0	/* Calc. step value b4, b5, b6, b7 */

/*
 * Data type - shouldn't be here
 */
#define UBYTE	unsigned char

struct lut_assoc {					/* Application info. associated with LUT */
	int						type;	/* Type of correction this LUT represents */
	int						status;	/* Current LUT status (see above) */
	float					gamma;	/* Gamma val for initial LUT calculation */
	struct look_up_table	*lut;	/* Pointer to the LUT */
	struct lut_assoc		*next;	/* Pointer to next in linked list */
};

struct look_up_table {
	UBYTE red_lut[256];
	UBYTE green_lut[256];
	UBYTE blue_lut[256];
};	

struct rgb {
	UBYTE	red,
			green,
			blue;
};