public HsbaColor(Brush brush)
{
HsbaColor hsba = Utility.RgbaToHsba(new RgbaColor(brush));
H = hsba.H;
S = hsba.S;
B = hsba.B;
A = hsba.A;
}
public HsbaColor(string hexColor)
{
HsbaColor hsba = Utility.RgbaToHsba(new RgbaColor(hexColor));
H = hsba.H;
S = hsba.S;
B = hsba.B;
A = hsba.A;
}
public HsbaColor(int r, int g, int b, int a = 255)
{
HsbaColor hsba = Utility.RgbaToHsba(new RgbaColor(r, g, b, a));
H = hsba.H;
S = hsba.S;
B = hsba.B;
A = hsba.A;
}
/// <summary>
/// Hsba转Rgba
/// </summary>
/// <param name="hsba"></param>
/// <returns></returns>
internal static RgbaColor HsbaToRgba(HsbaColor hsba)
{
double r = 0, g = 0, b = 0;
int i = (int)((hsba.H / 60) % 6);
double f = (hsba.H / 60) - i;
double p = hsba.B * (1 - hsba.S);
double q = hsba.B * (1 - f * hsba.S);
double t = hsba.B * (1 - (1 - f) * hsba.S);
switch (i)
{
case 0:
r = hsba.B;
g = t;
b = p;
break;
case 1:
r = q;
g = hsba.B;
b = p;
break;
case 2:
r = p;
g = hsba.B;
b = t;
break;
case 3:
r = p;
g = q;
b = hsba.B;
break;
case 4:
r = t;
g = p;
b = hsba.B;
break;
case 5:
r = hsba.B;
g = p;
b = q;
break;
default:
break;
}
return(new RgbaColor((int)(255.0 * r), (int)(255.0 * g), (int)(255.0 * b), (int)(255.0 * hsba.A)));
}