halftoner.h

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/*****************************************************************************\
  halftoner.h : Interface for the Halftoner class

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#ifndef APDK_HALFTONER_H
#define APDK_HALFTONER_H
//===========================================================================
//
//  Filename     :  Halftoner.h
//
//  Module       :  Open Source Imaging
//
//  Description  :  This file contains the class declaration for Imaging.
//
//===========================================================================

#ifndef HPTYPES_H
#include "hptypes.h"
#endif

APDK_BEGIN_NAMESPACE

// used to encourage consistent ordering of color planes
#define K   0
#define C   1
#define M   2
#define Y   3
#define Clight  4
#define Mlight  5

#define RANDSEED 77

////////////////////////////////////////////////////////////////////////////
// UMPQUA
//
// Encapsulation of buffers and data needed by Halftoner color-matching and
// halftoning code.

class Halftoner : public Processor
{
public:
    Halftoner(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();

    virtual BOOL Process(RASTERDATA* pbyInputKRGBRaster=NULL) = 0;
    virtual void Flush();

    DRIVER_ERROR constructor_error;

    virtual void Restart();         // set up for new page or blanks

    // items required by Processor
    unsigned int GetOutputWidth(COLORTYPE  rastercolor);
    unsigned int GetMaxOutputWidth(COLORTYPE  rastercolor);
    BYTE* NextOutputRaster(COLORTYPE  rastercolor);
    BOOL LastPlane();
    BOOL FirstPlane();
    unsigned int PlaneSize()
        { return OutputWidth[iColor] / 8 + (OutputWidth[iColor] % 8); }

    unsigned int ColorPlaneCount;
    unsigned int InputWidth;    // # of pixels input per colorplane
    unsigned int OutputWidth[MAXCOLORPLANES];   // # of pixels output per colorplane
    unsigned char ColorDepth[MAXCOLORPLANES];
    // how many rows needed relative to base resolution -- all 1 unless mixed-res
    unsigned char NumRows[MAXCOLORPLANES];
    // color plane data
    // for current interface, we must maintain mapping of
    //  0=K, 1=C, 2=M, 3=Y
    BYTE* ColorPlane[MAXCOLORPLANES][MAXCOLORROWS][MAXCOLORDEPTH];

    unsigned int StartPlane;    // since planes are ordered KCMY, if no K, this is 1
    unsigned int EndPlane;      // usually Y, could be Mlight
    unsigned int ResBoost;

protected:

    SystemServices* pSS;    // needed for memory management

    void FreeBuffers();

    HPBool Forward16PixelsNonWhite(HPBytePtr inputPtr)
    {
//        return ((*(HPUInt32Ptr)(inputPtr) != 0x0) || (*(((HPUInt32Ptr)(inputPtr)) + 1) != 0x0)  ||
//            (*(((HPUInt32Ptr)(inputPtr)) + 2) != 0x0) || (*(((HPUInt32Ptr)(inputPtr)) + 3) != 0x0));
        for (int i=0; i < 16; i++)
        {
            if ((*inputPtr++) != 0)
            {
                return TRUE;
            }
        }
        return FALSE;
    }

    HPBool Backward16PixelsNonWhite(HPBytePtr inputPtr)
    {
//        return ((*(HPUInt32Ptr)(inputPtr) != 0x0) || (*(((HPUInt32Ptr)(inputPtr)) - 1) != 0x0)  ||
//            (*(((HPUInt32Ptr)(inputPtr)) - 2) != 0x0) || (*(((HPUInt32Ptr)(inputPtr)) - 3) != 0x0));
        for (int i=0; i < 16; i++)
        {
            if ((*inputPtr--) !=0 )
            {
                return TRUE;
            }
        }
        return FALSE;
    }


    short* ErrBuff[6];

    short   nNextRaster;

    short          fRasterOdd;
    unsigned char* fBlackFEDResPtr;
    unsigned char* fColorFEDResPtr;

    unsigned int AdjustedInputWidth;    // InputWidth padded to be divisible by 8
    void PixelMultiply(unsigned char* buffer, unsigned int width, unsigned int factor);

    unsigned int iColor, iRow, iPlane;
    unsigned int PlaneCount();          // tells how many layers (colors,hifipe,multirow)

    BOOL started;

    BYTE* tempBuffer;
    BYTE* tempBuffer2;
	BYTE* originalKData;
    unsigned int oddbits;
    void CleanOddBits(unsigned int iColor, unsigned int iRow);

    HPUInt32 hold_random;
    inline BYTE RandomNumber()
    {
       hold_random = (hold_random * 214013) + 2531011;
       return (BYTE)((hold_random >> 16) & 0xFF);
    } //RandomNumber


    typedef struct THTDitherParms
    {
        HPUInt16    fNumPix;            // Dirty Pixels to be dithered
        HPBytePtr   fInput;             // Pixel array to dither
        HPBytePtr   fOutput1;           // Output raster binary & hifipe plane 1
        HPBytePtr   fOutput2;           // Output raster hifipe plane 2 (2-bit)
        HPBytePtr   fOutput3;           // Output raster hifipe plane 3 (3-bit)

        HPCBytePtr  fFEDResPtr;         // brkpnt table

        kSpringsErrorTypePtr    fErr;            // Current error buffer
        HPInt16                 fRasterEvenOrOdd;// Serpentine (Forward/Backward)

        HPBool                  fSymmetricFlag;   // Are we symmetric

        HPBool                  fHifipe;          // Are we doing Hifipe?

        HPUInt16                fMatrixRowSize;
        HPBytePtr               fMatrixV1;
        HPUInt16                fDitherCellOffset;
        HPUInt16                fSqueezeOffset;

        HPCInt16Ptr             fWeightTablePtr; // Error Diffusion threshold table
        HPInt16                 fOffsetPick;     // Random# offset for threshold
        HPBool                  fVerticalExpFlag; // Are we vertically expanding
    } THTDitherParms, ENVPTR(THTDitherParmsPtr);

    BOOL usematrix;

    DRIVER_ERROR HTMATRIXHI_KCMY(THTDitherParmsPtr ditherParmsPtr, HPUInt16 count);

}; //Halftoner

APDK_END_NAMESPACE

#endif //APDK_HALFTONER_H