88 lines
2.0 KiB
C
88 lines
2.0 KiB
C
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/*
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* HalftoneEngine.h
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* Copyright 1999-2000 Y.Takagi. All Rights Reserved.
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*/
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#ifndef __HALFTONE_H
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#define __HALFTONE_H
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#include <GraphicsDefs.h>
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struct CACHE_FOR_CMAP8 {
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uint density;
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bool hit;
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};
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class Halftone;
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typedef int (Halftone::*PFN_dither)(uchar *dst, const uchar *src, int x, int y, int width);
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typedef uint (*PFN_gray)(rgb_color c);
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class Halftone {
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public:
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enum DITHERTYPE {
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TYPE1,
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TYPE2,
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TYPE3
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};
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Halftone(color_space cs, double gamma = 1.4, DITHERTYPE dither_type = TYPE3);
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~Halftone();
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int dither(uchar *dst, const uchar *src, int x, int y, int width);
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int getPixelDepth() const;
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const rgb_color *getPalette() const;
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const uchar *getPattern() const;
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void setPattern(const uchar *pattern);
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PFN_gray getGrayFunction() const;
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void setGrayFunction(PFN_gray gray);
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protected:
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void createGammaTable(double gamma);
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void initElements(int x, int y, uchar *elements);
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int ditherGRAY1(uchar *dst, const uchar *src, int x, int y, int width);
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int ditherGRAY8(uchar *dst, const uchar *src, int x, int y, int width);
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int ditherCMAP8(uchar *dst, const uchar *src, int x, int y, int width);
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int ditherRGB32(uchar *dst, const uchar *src, int x, int y, int width);
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Halftone(const Halftone &);
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Halftone &operator = (const Halftone &);
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private:
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PFN_dither __dither;
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PFN_gray __gray;
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int __pixel_depth;
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const rgb_color *__palette;
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const uchar *__pattern;
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uint __gamma_table[256];
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CACHE_FOR_CMAP8 __cache_table[256];
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};
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inline int Halftone::getPixelDepth() const
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{
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return __pixel_depth;
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}
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inline const rgb_color *Halftone::getPalette() const
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{
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return __palette;
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}
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inline const uchar * Halftone::getPattern() const
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{
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return __pattern;
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}
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inline void Halftone::setPattern(const uchar *pattern)
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{
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__pattern = pattern;
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}
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inline PFN_gray Halftone::getGrayFunction() const
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{
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return __gray;
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}
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inline void Halftone::setGrayFunction(PFN_gray gray)
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{
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__gray = gray;
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}
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#endif /* __HALFTONE_H */
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