1/* $Header$ */
2
3/*
4 * Copyright (c) 1995-1997 Sam Leffler
5 * Copyright (c) 1995-1997 Silicon Graphics, Inc.
6 *
7 * Permission to use, copy, modify, distribute, and sell this software and
8 * its documentation for any purpose is hereby granted without fee, provided
9 * that (i) the above copyright notices and this permission notice appear in
10 * all copies of the software and related documentation, and (ii) the names of
11 * Sam Leffler and Silicon Graphics may not be used in any advertising or
12 * publicity relating to the software without the specific, prior written
13 * permission of Sam Leffler and Silicon Graphics.
14 *
15 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
17 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
18 *
19 * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
20 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
21 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
22 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
23 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
24 * OF THIS SOFTWARE.
25 */
26
27#ifndef _TIFFPREDICT_
28#define	_TIFFPREDICT_
29/*
30 * ``Library-private'' Support for the Predictor Tag
31 */
32
33/*
34 * Codecs that want to support the Predictor tag must place
35 * this structure first in their private state block so that
36 * the predictor code can cast tif_data to find its state.
37 */
38typedef struct {
39	int	predictor;		/* predictor tag value */
40	int	stride;			/* sample stride over data */
41	tsize_t	rowsize;		/* tile/strip row size */
42
43	TIFFPostMethod	pfunc;		/* horizontal differencer/accumulator */
44	TIFFCodeMethod	coderow;	/* parent codec encode/decode row */
45	TIFFCodeMethod	codestrip;	/* parent codec encode/decode strip */
46	TIFFCodeMethod	codetile;	/* parent codec encode/decode tile */
47	TIFFVGetMethod	vgetparent;	/* super-class method */
48	TIFFVSetMethod	vsetparent;	/* super-class method */
49	TIFFPrintMethod	printdir;	/* super-class method */
50	TIFFBoolMethod	setupdecode;	/* super-class method */
51	TIFFBoolMethod	setupencode;	/* super-class method */
52} TIFFPredictorState;
53
54#if defined(__cplusplus)
55extern "C" {
56#endif
57extern	int TIFFPredictorInit(TIFF*);
58#if defined(__cplusplus)
59}
60#endif
61#endif /* _TIFFPREDICT_ */
62