halftoner_open.h

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/*****************************************************************************\
  halftoner_open.h : Open Source Imaging Halftoning Interface

  Copyright (c) 1994 - 2001, Hewlett-Packard Co.
  All rights reserved.

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\*****************************************************************************/


#ifndef HALFTONER_OPEN_H
#define HALFTONER_OPEN_H

APDK_BEGIN_NAMESPACE

class Halftoner_Open : public Halftoner
{
public:
    Halftoner_Open
    (
        SystemServices* pSys,
        PrintMode* pPM,
        unsigned int iInputWidth,
        unsigned int iNumRows[],        // for mixed-res cases
        unsigned int HiResFactor,        // when base-res is multiple of 300
        BOOL matrixbased
    );
    virtual ~Halftoner_Open();

    virtual BOOL Process(RASTERDATA* pbyInputKRGBRaster=NULL);


protected:

    void Interpolate(const uint32_t *start,const unsigned long i,
        unsigned char r,unsigned char g,unsigned char b,
        unsigned char *blackout, unsigned char *cyanout,
        unsigned char *magentaout, unsigned char *yellowout, HPBool);


    HPByte HPRand() // normalize to 5..79
    { BYTE b=RandomNumber() % 74; b+= 5; return b; }


    void HTEDiffOpen   (THTDitherParmsPtr ditherParmsPtr,
        HPUInt16          count);

    THTDitherParms  fDitherParms[6];

    THTDitherParmsPtr       ditherParms;
    kSpringsErrorType       tone;
    kSpringsErrorTypePtr    diffusionErrorPtr;
    kSpringsErrorType       tmpShortStore;
    HPUInt8                 rasterByte1, rasterByte2, rasterByte3;
    HPUInt8                 level;
    HPInt16                 pixelCount;
    HPInt16                 thValue;

    kSpringsErrorTypePtr    errPtr;
    HPUInt16                numLoop;

    HPBytePtr               inputPtr;
    HPBytePtr               outputPtr1, outputPtr2, outputPtr3;

    HPCBytePtr               fedResTbl;
    HPCBytePtr               fedResPtr;

    HPBool                  symmetricFlag;

    HPBool                  doNext8Pixels;

    HPBool                  hifipe;

    void BACKWARD_FED( HPInt16 thresholdValue, unsigned int bitMask );
    void FORWARD_FED( HPInt16 thresholdValue, unsigned int bitMask );

};

APDK_END_NAMESPACE

#endif //HALFTONER_OPEN_H