/* $Id: tif_predict.h,v 1.3 2006/03/03 14:10:09 dron Exp $ */

/*

 * Copyright (c) 1995-1997 Sam Leffler

 * Copyright (c) 1995-1997 Silicon Graphics, Inc.

 *

 * Permission to use, copy, modify, distribute, and sell this software and 

 * its documentation for any purpose is hereby granted without fee, provided

 * that (i) the above copyright notices and this permission notice appear in

 * all copies of the software and related documentation, and (ii) the names of

 * Sam Leffler and Silicon Graphics may not be used in any advertising or

 * publicity relating to the software without the specific, prior written

 * permission of Sam Leffler and Silicon Graphics.

 * 

 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, 

 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY 

 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  

 * 

 * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR

 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,

 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,

 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF 

 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 

 * OF THIS SOFTWARE.

 */

#ifndef _TIFFPREDICT_

#define	_TIFFPREDICT_

/*

 * ``Library-private'' Support for the Predictor Tag

 */

/*

 * Codecs that want to support the Predictor tag must place

 * this structure first in their private state block so that

 * the predictor code can cast tif_data to find its state.

 */

typedef struct {

	int		predictor;	/* predictor tag value */

	int		stride;		/* sample stride over data */

	tsize_t		rowsize;	/* tile/strip row size */

	TIFFPostMethod	pfunc;		/* horizontal differencer/accumulator */

	TIFFCodeMethod	coderow;	/* parent codec encode/decode row */

	TIFFCodeMethod	codestrip;	/* parent codec encode/decode strip */

	TIFFCodeMethod	codetile;	/* parent codec encode/decode tile */

	TIFFVGetMethod	vgetparent;	/* super-class method */

	TIFFVSetMethod	vsetparent;	/* super-class method */

	TIFFPrintMethod	printdir;	/* super-class method */

	TIFFBoolMethod	setupdecode;	/* super-class method */

	TIFFBoolMethod	setupencode;	/* super-class method */

} TIFFPredictorState;

#if defined(__cplusplus)

extern "C" {

#endif

extern	int TIFFPredictorInit(TIFF*);

extern	int TIFFPredictorCleanup(TIFF*);

#if defined(__cplusplus)

}

#endif

#endif /* _TIFFPREDICT_ */

/* vim: set ts=8 sts=8 sw=8 noet: */