/* @(#) Basic image type for defining an image
 * in the Artiste project and compatibility with VIPS
 * uses all the VIPS defines for direct copying to an IMAGE
 *	4/12/00 - KM
 */

#ifdef __cplusplus
extern "C" {
#endif /*__cplusplus*/

/* Bits per Band */
#define BBBYTE		8
#define BBSHORT		16
#define BBINT		32
#define BBFLOAT		32
#define BBCOMPLEX	64	/* complex consisting of two floats */
#define BBDOUBLE	64
#define BBDPCOMPLEX	128	/* complex consisting of two doubles */

/* picture Type */
#define MULTIBAND	0
#define B_W		1
#define LUMINACE	2
#define XRAY		3
#define IR		4
#define YUV		5
#define RED_ONLY	6			/* red channel only	*/
#define GREEN_ONLY	7			/* green channel only	*/
#define BLUE_ONLY	8			/* blue channel only	*/
#define POWER_SPECTRUM	9
#define HISTOGRAM	10

/* Colour spaces. - defined in Type
 */
#define LUT		11
#define XYZ		12
#define LAB		13
#define CMC		14
#define CMYK		15
#define LABQ		16
#define RGB		17
#define UCS		18
#define LCH		19
#define LABS		21
#define sRGB		22

/* BandFmt - usually only use 0 or sometimes 5 and 8
 */
#define FMTNOTSET	-1	
#define FMTUCHAR	0	/* pels interpreted as unsigned chars */
#define FMTCHAR		1	/* pels interpreted as signed chars */
#define FMTUSHORT	2	/* pels interpreted as unsigned shorts */
#define FMTSHORT	3	/* pels interpreted as signed shorts */
#define FMTUINT		4	/* pels interpreted as unsigned ints */
#define FMTINT		5	/* pels interpreted as signed ints */
#define FMTFLOAT	6	/* pels interpreted as floats */
#define FMTCOMPLEX	7	/* pels interpreted as complex (2 float each) */
#define FMTDOUBLE	8	/* pels interpreted as unsigned double */
#define FMTDPCOMPLEX	9	/* pels interpreted as complex (2 double each)*/

/* Coding type  - usually 0
 */
#define NOCODING		0
#define COLQUANT		1
#define LABPACK			2
#define LABPACK_COMPRESSED	3
#define RGB_COMPRESSED		4
#define LUM_COMPRESSED		5

/* Compression type  - usually 0
 */
#define NO_COMPRESSION		0
#define TCSF_COMPRESSION	1
#define JPEG_COMPRESSION	2

/* Types of image descriptor we may have. The type field is advisory only: it
 * does not imply that any fields in IMAGE have valid data.
 */

/* Image descriptor
 */
typedef struct {
	/* Fields describing the image
	 */
	int Xsize;
	int Ysize;
	int Bands;
	int Bbits;
	int BandFmt;
	int Coding;
	int Type;
	float Xres; /* in pels per mm */
	float Yres;

	/* Derived fields that user probably shouldn't fiddle with.
	* except data points to the first image byte
	* data can be initialised by Artiste UDMs
	* filename and fd are empty for Artiste
	 */
	char *data;		/* start of image data */
	char *filename;		/* pointer to copy of filename */
	int fd;         	/* file descriptor */

} Image_type;

/* Macros on IMAGEs. Use these to get line lengths etc in low-level code
 *	esize()		sizeof band element
 *	psize()		sizeof pel
 *	lsize()		sizeof scan line
 *	niele()		number of elements in scan line
 */
#define esize(I) ((I)->Bbits >> 3)
#define psize(I) (esize(I)*(I)->Bands)
#define lsize(I) (psize(I)*(I)->Xsize)
#define niele(I) ((I)->Bands*(I)->Xsize)


#ifdef __cplusplus
}
#endif /*__cplusplus*/