/* $Id: tif_predict.h,v 1.8 2010-03-10 18:56:49 bfriesen 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 */

	tmsize_t        stride;		/* sample stride over data */

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

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

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

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

	TIFFPostMethod  encodepfunc;	/* horizontal differencer */

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

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

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

	TIFFPostMethod  decodepfunc;	/* horizontal accumulator */

	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_ */

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