tif_predict.h File Reference

#include "tiffio.h"
#include "tiffiop.h"

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Classes
struct	TIFFPredictorState

Typedefs
typedef int(*	TIFFEncodeDecodeMethod) (TIFF *tif, uint8_t *buf, tmsize_t size)

Functions
int	TIFFPredictorInit (TIFF *)
int	TIFFPredictorCleanup (TIFF *)

Typedef Documentation

TIFFEncodeDecodeMethod

typedef int(* TIFFEncodeDecodeMethod) (TIFF *tif, uint8_t *buf, tmsize_t size)

Definition at line 35 of file tif_predict.h.

Function Documentation

TIFFPredictorCleanup()

int TIFFPredictorCleanup

(

TIFF *

tif

)

Definition at line 1148 of file tif_predict.c.

{
    TIFFPredictorState *sp = PredictorState(tif);
 
    assert(sp != 0);
 
    tif->tif_tagmethods.vgetfield = sp->vgetparent;
    tif->tif_tagmethods.vsetfield = sp->vsetparent;
    tif->tif_tagmethods.printdir = sp->printdir;
    tif->tif_setupdecode = sp->setupdecode;
    tif->tif_setupencode = sp->setupencode;
 
    return 1;
}

TIFFPredictorInit()

int TIFFPredictorInit

(

TIFF *

tif

)

Definition at line 1108 of file tif_predict.c.

{
    TIFFPredictorState *sp = PredictorState(tif);
 
    assert(sp != 0);
 
    /*
     * Merge codec-specific tag information.
     */
    if (!_TIFFMergeFields(tif, predictFields, TIFFArrayCount(predictFields)))
    {
        TIFFErrorExtR(tif, "TIFFPredictorInit",
                      "Merging Predictor codec-specific tags failed");
        return 0;
    }
 
    /*
     * Override parent get/set field methods.
     */
    sp->vgetparent = tif->tif_tagmethods.vgetfield;
    tif->tif_tagmethods.vgetfield =
        PredictorVGetField; /* hook for predictor tag */
    sp->vsetparent = tif->tif_tagmethods.vsetfield;
    tif->tif_tagmethods.vsetfield =
        PredictorVSetField; /* hook for predictor tag */
    sp->printdir = tif->tif_tagmethods.printdir;
    tif->tif_tagmethods.printdir =
        PredictorPrintDir; /* hook for predictor tag */
 
    sp->setupdecode = tif->tif_setupdecode;
    tif->tif_setupdecode = PredictorSetupDecode;
    sp->setupencode = tif->tif_setupencode;
    tif->tif_setupencode = PredictorSetupEncode;
 
    sp->predictor = 1;      /* default value */
    sp->encodepfunc = NULL; /* no predictor routine */
    sp->decodepfunc = NULL; /* no predictor routine */
    return 1;
}