12fd6cc2e7
* move libprint headers into libs headers folder accordingly * merge all shared folders sources into kits print, we might build later on a real print kit, propably also to access cups from an nicely API, atm static * move all shared headers into private print, also pr_server.h from interface * adjust build to work with the changed folder layout git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26570 a95241bf-73f2-0310-859d-f6bbb57e9c96
149 lines
3.4 KiB
C++
149 lines
3.4 KiB
C++
/*
|
|
* Halftone.h
|
|
* Copyright 1999-2000 Y.Takagi. All Rights Reserved.
|
|
*/
|
|
|
|
#ifndef __HALFTONE_H
|
|
#define __HALFTONE_H
|
|
|
|
#include <GraphicsDefs.h>
|
|
|
|
// definition for B_RGB32 (=B_RGB32_LITTLE) and B_RGBA32
|
|
typedef struct {
|
|
uchar blue;
|
|
uchar green;
|
|
uchar red;
|
|
uchar alpha; // unused in B_RGB32
|
|
} ColorRGB32Little;
|
|
|
|
// definition for B_RGB32_BIG and B_RGBA32_BIG
|
|
typedef struct {
|
|
uchar alpha; // unused in B_RGB32_BIG
|
|
uchar red;
|
|
uchar green;
|
|
uchar blue;
|
|
} ColorRGB32Big;
|
|
|
|
typedef union {
|
|
ColorRGB32Little little;
|
|
ColorRGB32Big big;
|
|
} ColorRGB32;
|
|
|
|
class Halftone;
|
|
typedef void (Halftone::*PFN_dither)(uchar *dst, const uchar *src, int x, int y, int width);
|
|
typedef uint (*PFN_gray)(ColorRGB32 c);
|
|
|
|
class Halftone {
|
|
public:
|
|
enum DitherType {
|
|
kType1,
|
|
kType2,
|
|
kType3,
|
|
kTypeFloydSteinberg,
|
|
};
|
|
enum GrayFunction {
|
|
kMixToGray,
|
|
kRedChannel,
|
|
kGreenChannel,
|
|
kBlueChannel
|
|
};
|
|
enum Planes {
|
|
kPlaneMonochrome1, // 1 bit depth (0 white, 1 black)
|
|
kPlaneRGB1, // 3 planes, 1 bit depth (0 black, 7 white)
|
|
};
|
|
enum BlackValue {
|
|
kHighValueMeansBlack,
|
|
kLowValueMeansBlack,
|
|
};
|
|
Halftone(color_space cs, double gamma = 1.4, double min = 0.0, DitherType dither_type = kTypeFloydSteinberg);
|
|
~Halftone();
|
|
void setPlanes(Planes planes);
|
|
void setBlackValue(BlackValue blackValue);
|
|
void dither(uchar *dst, const uchar *src, int x, int y, int width);
|
|
int getPixelDepth() const;
|
|
const uchar *getPattern() const;
|
|
void setPattern(const uchar *pattern);
|
|
|
|
protected:
|
|
// PFN_gray: return value of 0 means low density (or black) and value of 255 means high density (or white)
|
|
PFN_gray getGrayFunction() const;
|
|
void setGrayFunction(PFN_gray gray);
|
|
void setGrayFunction(GrayFunction grayFunction);
|
|
|
|
void createGammaTable(double gamma, double min);
|
|
void initElements(int x, int y, uchar *elements);
|
|
uint getDensity(ColorRGB32 c) const;
|
|
uchar convertUsingBlackValue(uchar byte) const;
|
|
void ditherRGB32(uchar *dst, const uchar *src, int x, int y, int width);
|
|
|
|
void initFloydSteinberg();
|
|
void deleteErrorTables();
|
|
void uninitFloydSteinberg();
|
|
void setupErrorBuffer(int x, int y, int width);
|
|
void ditherFloydSteinberg(uchar *dst, const uchar* src, int x, int y, int width);
|
|
|
|
Halftone(const Halftone &);
|
|
Halftone &operator = (const Halftone &);
|
|
|
|
private:
|
|
enum {
|
|
kGammaTableSize = 256,
|
|
kMaxNumberOfPlanes = 3
|
|
};
|
|
PFN_dither fDither;
|
|
PFN_gray fGray;
|
|
int fPixelDepth;
|
|
Planes fPlanes;
|
|
BlackValue fBlackValue;
|
|
const uchar *fPattern;
|
|
uint fGammaTable[kGammaTableSize];
|
|
int fNumberOfPlanes;
|
|
int fCurrentPlane;
|
|
// fields used for floyd-steinberg dithering
|
|
int fX;
|
|
int fY;
|
|
int fWidth;
|
|
int *fErrorTables[kMaxNumberOfPlanes];
|
|
};
|
|
|
|
inline int Halftone::getPixelDepth() const
|
|
{
|
|
return fPixelDepth;
|
|
}
|
|
|
|
inline const uchar * Halftone::getPattern() const
|
|
{
|
|
return fPattern;
|
|
}
|
|
|
|
inline void Halftone::setPattern(const uchar *pattern)
|
|
{
|
|
fPattern = pattern;
|
|
}
|
|
|
|
inline PFN_gray Halftone::getGrayFunction() const
|
|
{
|
|
return fGray;
|
|
}
|
|
inline void Halftone::setGrayFunction(PFN_gray gray)
|
|
{
|
|
fGray = gray;
|
|
}
|
|
|
|
inline uint Halftone::getDensity(ColorRGB32 c) const
|
|
{
|
|
return fGammaTable[fGray(c)];
|
|
}
|
|
|
|
inline uchar Halftone::convertUsingBlackValue(uchar byte) const
|
|
{
|
|
// bits with value = '1' in byte mean black
|
|
if (fBlackValue == kHighValueMeansBlack) {
|
|
return byte;
|
|
} else {
|
|
return ~byte;
|
|
}
|
|
}
|
|
|
|
#endif /* __HALFTONE_H */
|