tif_predict.h

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/* $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_ */

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