// Allocate conversion state structures and make look_up tables for
// the Yr,Yb,Yg <=> r,g,b conversions.
public static int TIFFCIELabToRGBInit(TIFFCIELabToRGB cielab, TIFFDisplay display, double[] refWhite)
{
cielab.range = TIFFCIELabToRGB.CIELABTORGB_TABLE_RANGE;
cielab.display.CopyTo(display);
cielab.rstep = (cielab.display.d_YCR - cielab.display.d_Y0R) / cielab.range;
cielab.gstep = (cielab.display.d_YCG - cielab.display.d_Y0G) / cielab.range;
cielab.bstep = (cielab.display.d_YCB - cielab.display.d_Y0B) / cielab.range;
double gammaR = 1.0 / cielab.display.d_gammaR;
double gammaG = 1.0 / cielab.display.d_gammaG;
double gammaB = 1.0 / cielab.display.d_gammaB;
for (int i = 0; i <= cielab.range; i++)
{
double v = (double)i / cielab.range;
cielab.Yr2r[i] = cielab.display.d_Vrwr * ((float)Math.Pow(v, gammaR));
cielab.Yg2g[i] = cielab.display.d_Vrwg * ((float)Math.Pow(v, gammaG));
cielab.Yb2b[i] = cielab.display.d_Vrwb * ((float)Math.Pow(v, gammaB));
}
// Init reference white point
cielab.X0 = (float)refWhite[0];
cielab.Y0 = (float)refWhite[1];
cielab.Z0 = (float)refWhite[2];
return(0);
}
// Allocate conversion state structures and make look_up tables for
// the Yr,Yb,Yg <=> r,g,b conversions.
public static int TIFFCIELabToRGBInit(TIFFCIELabToRGB cielab, TIFFDisplay display, double[] refWhite)
{
cielab.range=TIFFCIELabToRGB.CIELABTORGB_TABLE_RANGE;
cielab.display.CopyTo(display);
cielab.rstep=(cielab.display.d_YCR-cielab.display.d_Y0R)/cielab.range;
cielab.gstep=(cielab.display.d_YCG-cielab.display.d_Y0G)/cielab.range;
cielab.bstep=(cielab.display.d_YCB-cielab.display.d_Y0B)/cielab.range;
double gammaR=1.0/cielab.display.d_gammaR;
double gammaG=1.0/cielab.display.d_gammaG;
double gammaB=1.0/cielab.display.d_gammaB;
for(int i=0; i<=cielab.range; i++)
{
double v=(double)i/cielab.range;
cielab.Yr2r[i]=cielab.display.d_Vrwr*((float)Math.Pow(v, gammaR));
cielab.Yg2g[i]=cielab.display.d_Vrwg*((float)Math.Pow(v, gammaG));
cielab.Yb2b[i]=cielab.display.d_Vrwb*((float)Math.Pow(v, gammaB));
}
// Init reference white point
cielab.X0=(float)refWhite[0];
cielab.Y0=(float)refWhite[1];
cielab.Z0=(float)refWhite[2];
return 0;
}
public void CopyTo(TIFFDisplay t)
{
t.d_mat[0, 0] = d_mat[0, 0];
t.d_mat[0, 1] = d_mat[0, 1];
t.d_mat[0, 2] = d_mat[0, 2];
t.d_mat[1, 0] = d_mat[1, 0];
t.d_mat[1, 1] = d_mat[1, 1];
t.d_mat[1, 2] = d_mat[1, 2];
t.d_mat[2, 0] = d_mat[2, 0];
t.d_mat[2, 1] = d_mat[2, 1];
t.d_mat[2, 2] = d_mat[2, 2];
t.d_YCR = d_YCR;
t.d_YCG = d_YCG;
t.d_YCB = d_YCB;
t.d_Vrwr = d_Vrwr;
t.d_Vrwg = d_Vrwg;
t.d_Vrwb = d_Vrwb;
t.d_Y0R = d_Y0R;
t.d_Y0G = d_Y0G;
t.d_Y0B = d_Y0B;
t.d_gammaR = d_gammaR;
t.d_gammaG = d_gammaG;
t.d_gammaB = d_gammaB;
}
public void CopyTo(TIFFDisplay t)
{
t.d_mat[0, 0]=d_mat[0, 0];
t.d_mat[0, 1]=d_mat[0, 1];
t.d_mat[0, 2]=d_mat[0, 2];
t.d_mat[1, 0]=d_mat[1, 0];
t.d_mat[1, 1]=d_mat[1, 1];
t.d_mat[1, 2]=d_mat[1, 2];
t.d_mat[2, 0]=d_mat[2, 0];
t.d_mat[2, 1]=d_mat[2, 1];
t.d_mat[2, 2]=d_mat[2, 2];
t.d_YCR=d_YCR;
t.d_YCG=d_YCG;
t.d_YCB=d_YCB;
t.d_Vrwr=d_Vrwr;
t.d_Vrwg=d_Vrwg;
t.d_Vrwb=d_Vrwb;
t.d_Y0R=d_Y0R;
t.d_Y0G=d_Y0G;
t.d_Y0B=d_Y0B;
t.d_gammaR=d_gammaR;
t.d_gammaG=d_gammaG;
t.d_gammaB=d_gammaB;
}
