public Color2 ConvertToRgb(Info info)
{
int r, g, b;
r = (byte)Common.Clamp(info.a + 128, 0, 255);
g = (byte)Common.Clamp(info.b + 128, 0, 255);
b = (byte)Common.Clamp(info.c + 128, 0, 255);
return new Color2() { a = 255, r = (byte)r, g = (byte)g, b = (byte)b };
}
public Color2 ConvertToRgb(Info info)
{
byte r, g, b;
float y = info.a + 128;
float cb = info.b;
float cr = info.c;
r = (byte)Common.Clamp(y + cr * mYcbcrRgb[0, 2], 0, 255);
g = (byte)Common.Clamp(y + cb * mYcbcrRgb[1, 1] + cr * mYcbcrRgb[1, 2], 0, 255);
b = (byte)Common.Clamp(y + cb * mYcbcrRgb[2, 1] , 0, 255);
return new Color2() { a = 255, r = r, g = g, b = b };
}
internal Info LabToXyz(Info lab)
{
Info xyz;
float fy = (((lab.a + 128f) / 2.55f) + 16f) / 116f;
float fx = lab.b / 500f + fy;
float fz = fy - lab.c / 200f;
xyz.a = CreoQueSeQueHace(fx) * D65.x;
xyz.b = CreoQueSeQueHace(fy) * D65.y;
xyz.c = CreoQueSeQueHace(fz) * D65.z;
return xyz;
}
internal Info XyzToLab(Info xyz, bool clamp = false)
{
Info lab;
// Usando D65
float fx = NoSeQueHace(xyz.a / D65.x);
float fy = NoSeQueHace(xyz.b / D65.y);
float fz = NoSeQueHace(xyz.c / D65.z);
lab.a = (116f * fy - 16f) * 2.55f - 128f;
lab.b = 500f * (fx - fy);
lab.c = 200f * (fy - fz);
if (clamp)
{
lab.a = Common.Clamp(lab.a, -128f, 127f);
lab.b = Common.Clamp(lab.b, -128f, 127f);
lab.c = Common.Clamp(lab.c, -128f, 127f);
}
return lab;
}
public Color2 ConvertToRgb(Info info)
{
info = LabToXyz(info);
return XyzToRgb(info);
}
internal Color2 XyzToRgb(Info xyz)
{
float r, g, b;
int ir, ig, ib;
r = xyz.a * mXyzsRgb[0, 0] + xyz.b * mXyzsRgb[0, 1] + xyz.c * mXyzsRgb[0, 2];
g = xyz.a * mXyzsRgb[1, 0] + xyz.b * mXyzsRgb[1, 1] + xyz.c * mXyzsRgb[1, 2];
b = xyz.a * mXyzsRgb[2, 0] + xyz.b * mXyzsRgb[2, 1] + xyz.c * mXyzsRgb[2, 2];
ir = GetRgbColor(r);
ig = GetRgbColor(g);
ib = GetRgbColor(b);
return new Color2() { a = 255, r = (byte)ir, g = (byte)ig, b = (byte)ib };
}
public Info ConvertFromRgb(Color2 rgb)
{
Info info = RgbToXyz(rgb);
return(XyzToLab(info));
}
public Color2 ConvertToRgb(Info info)
{
info = LabToXyz(info);
return(XyzToRgb(info));
}
