src/tiff/tif_predict.h

   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  */
  38 typedef 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)
  55 extern "C" {
  56 #endif
  57 extern  int TIFFPredictorInit(TIFF*);
  58 #if defined(__cplusplus)
  59 }
  60 #endif
  61 #endif /* _TIFFPREDICT_ */