1 /*****************************************************************************\
2 halftoner_open.h : Open Source Imaging Halftoning Interface
4 Copyright (c) 1994 - 2001, Hewlett-Packard Co.
7 Redistribution and use in source and binary forms, with or without
8 modification, are permitted provided that the following conditions
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29 \*****************************************************************************/
32 #ifndef HALFTONER_OPEN_H
33 #define HALFTONER_OPEN_H
37 class Halftoner_Open : public Halftoner
44 unsigned int iInputWidth,
45 unsigned int iNumRows[], // for mixed-res cases
46 unsigned int HiResFactor, // when base-res is multiple of 300
49 virtual ~Halftoner_Open();
51 virtual BOOL Process(RASTERDATA* pbyInputKRGBRaster=NULL);
56 void Interpolate(const uint32_t *start,const unsigned long i,
57 unsigned char r,unsigned char g,unsigned char b,
58 unsigned char *blackout, unsigned char *cyanout,
59 unsigned char *magentaout, unsigned char *yellowout, HPBool);
62 HPByte HPRand() // normalize to 5..79
63 { BYTE b=RandomNumber() % 74; b+= 5; return b; }
66 void HTEDiffOpen (THTDitherParmsPtr ditherParmsPtr,
69 THTDitherParms fDitherParms[6];
71 THTDitherParmsPtr ditherParms;
72 kSpringsErrorType tone;
73 kSpringsErrorTypePtr diffusionErrorPtr;
74 kSpringsErrorType tmpShortStore;
75 HPUInt8 rasterByte1, rasterByte2, rasterByte3;
80 kSpringsErrorTypePtr errPtr;
84 HPBytePtr outputPtr1, outputPtr2, outputPtr3;
95 void BACKWARD_FED( HPInt16 thresholdValue, unsigned int bitMask );
96 void FORWARD_FED( HPInt16 thresholdValue, unsigned int bitMask );
102 #endif //HALFTONER_OPEN_H