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00020 #ifndef KIS_YCBCR_U8_COLORSPACE_H
00021 #define KIS_YCBCR_U8_COLORSPACE_H
00022
00023 #include <kis_u8_base_colorspace.h>
00024
00025 #define LUMA_RED 0.2989
00026 #define LUMA_GREEN 0.587
00027 #define LUMA_BLUE 0.114
00028
00029
00030
00031 class KisYCbCrU8ColorSpace : public KisU8BaseColorSpace
00032 {
00033 public:
00034 KisYCbCrU8ColorSpace(KisColorSpaceFactoryRegistry* parent, KisProfile* p);
00035 ~KisYCbCrU8ColorSpace();
00036 virtual bool willDegrade(ColorSpaceIndependence )
00037 {
00038 return false;
00039 };
00040 public:
00041 void setPixel(Q_UINT8 *pixel, Q_UINT8 Y, Q_UINT8 Cb, Q_UINT8 Cr, Q_UINT8 alpha) const;
00042 void getPixel(const Q_UINT8 *pixel, Q_UINT8 *Y, Q_UINT8 *Cb, Q_UINT8 *Cr, Q_UINT8 *alpha) const;
00043
00044 virtual void fromQColor(const QColor& c, Q_UINT8 *dst, KisProfile * profile = 0);
00045 virtual void fromQColor(const QColor& c, Q_UINT8 opacity, Q_UINT8 *dst, KisProfile * profile = 0);
00046
00047 virtual void toQColor(const Q_UINT8 *src, QColor *c, KisProfile * profile = 0);
00048 virtual void toQColor(const Q_UINT8 *src, QColor *c, Q_UINT8 *opacity, KisProfile * profile = 0);
00049
00050 virtual Q_UINT8 difference(const Q_UINT8 *src1, const Q_UINT8 *src2);
00051 virtual void mixColors(const Q_UINT8 **colors, const Q_UINT8 *weights, Q_UINT32 nColors, Q_UINT8 *dst) const;
00052
00053 virtual QValueVector<KisChannelInfo *> channels() const;
00054 virtual Q_UINT32 nChannels() const;
00055 virtual Q_UINT32 nColorChannels() const;
00056 virtual Q_UINT32 pixelSize() const;
00057
00058 virtual QImage convertToQImage(const Q_UINT8 *data, Q_INT32 width, Q_INT32 height,
00059 KisProfile * dstProfile,
00060 Q_INT32 renderingIntent,
00061 float exposure = 0.0f);
00062
00063 virtual KisCompositeOpList userVisiblecompositeOps() const;
00064
00065 protected:
00066
00067 virtual void bitBlt(Q_UINT8 *dst,
00068 Q_INT32 dstRowStride,
00069 const Q_UINT8 *src,
00070 Q_INT32 srcRowStride,
00071 const Q_UINT8 *srcAlphaMask,
00072 Q_INT32 maskRowStride,
00073 Q_UINT8 opacity,
00074 Q_INT32 rows,
00075 Q_INT32 cols,
00076 const KisCompositeOp& op);
00077
00078 void compositeOver(Q_UINT8 *dst, Q_INT32 dstRowStride, const Q_UINT8 *src, Q_INT32 srcRowStride, const Q_UINT8 *mask, Q_INT32 maskRowStride, Q_INT32 rows, Q_INT32 columns, Q_UINT8 opacity);
00079 void compositeErase(Q_UINT8 *dst, Q_INT32 dstRowStride, const Q_UINT8 *src, Q_INT32 srcRowStride, const Q_UINT8 *mask, Q_INT32 maskRowStride, Q_INT32 rows, Q_INT32 columns, Q_UINT8 opacity);
00080 void compositeCopy(Q_UINT8 *dst, Q_INT32 dstRowStride, const Q_UINT8 *src, Q_INT32 srcRowStride, const Q_UINT8 *mask, Q_INT32 maskRowStride, Q_INT32 rows, Q_INT32 columns, Q_UINT8 opacity);
00081
00082 private:
00083 #define CLAMP_TO_8BITCHANNEL(a) CLAMP(a, 0, Q_UINT8_MAX)
00084 inline Q_UINT8 computeRed(Q_UINT8 Y, Q_UINT8 , Q_UINT8 Cr)
00085 {
00086 return (Q_UINT8)( CLAMP_TO_8BITCHANNEL( (Cr - 128)* (2-2*LUMA_RED) + Y ) );
00087 }
00088 inline Q_UINT8 computeGreen(Q_UINT8 Y, Q_UINT8 Cb, Q_UINT8 Cr)
00089 {
00090 return (Q_UINT8)( CLAMP_TO_8BITCHANNEL( (Y - LUMA_BLUE * computeBlue(Y,Cb,Cr) - LUMA_RED * computeRed(Y,Cb,Cr) ) / LUMA_GREEN ) );
00091 }
00092 inline Q_UINT8 computeBlue(Q_UINT8 Y, Q_UINT8 Cb, Q_UINT8 )
00093 {
00094 return (Q_UINT8)( CLAMP_TO_8BITCHANNEL( (Cb - 128)*(2 - 2 * LUMA_BLUE) + Y) );
00095 }
00096 inline Q_UINT8 computeY( Q_UINT8 r, Q_UINT8 b, Q_UINT8 g)
00097 {
00098 return (Q_UINT8)( CLAMP_TO_8BITCHANNEL( LUMA_RED*r + LUMA_GREEN*g + LUMA_BLUE*b ) );
00099 }
00100 inline Q_UINT8 computeCb( Q_UINT8 r, Q_UINT8 b, Q_UINT8 g)
00101 {
00102 return (Q_UINT8)( CLAMP_TO_8BITCHANNEL( (b - computeY(r,g,b))/(2-2*LUMA_BLUE) + 128) );
00103 }
00104 inline Q_UINT8 computeCr( Q_UINT8 r, Q_UINT8 b, Q_UINT8 g)
00105 {
00106 return (Q_UINT8)( CLAMP_TO_8BITCHANNEL( (r - computeY(r,g,b))/(2-2*LUMA_RED) + 128) );
00107 }
00108 #undef CLAMP_TO_8BITCHANNEL
00109
00110 static const Q_UINT8 PIXEL_Y = 0;
00111 static const Q_UINT8 PIXEL_Cb = 1;
00112 static const Q_UINT8 PIXEL_Cr = 2;
00113 static const Q_UINT8 PIXEL_ALPHA = 3;
00114
00115 struct Pixel {
00116 Q_UINT8 Y;
00117 Q_UINT8 Cb;
00118 Q_UINT8 Cr;
00119 Q_UINT8 alpha;
00120 };
00121 };
00122
00123 #endif