public static CMYK FromRGB(RGB value)
{
double
c = 1.0 - value.R,
m = 1.0 - value.G,
y = 1.0 - value.B,
k = 1.0;
if (c < k) k = c;
if (m < k) k = m;
if (y < k) k = y;
if (k == 1.0) //black
{
c = m = y = 0.0;
}
else {
c = (c - k)/(1.0 - k);
m = (m - k)/(1.0 - k);
y = (y - k)/(1.0 - k);
}
return new CMYK(c, m, y, k);
}
public static XYZ FromRGB(RGB value)
{
double
r=GammaCorrection(value.R),
g=GammaCorrection(value.G),
b=GammaCorrection(value.B);
//Observer. = 2°, Illuminant = D65
return new XYZ(
r*41.24+g*35.76+b*18.05,//multiplicated by 100
r*21.26+g*71.52+b*7.22,
r*1.93+g*11.92+b*95.05);
}
public static HSV FromRGB(RGB col)
{
double
min = Math.Min( Math.Min(col.R,col.G),col.B),
max = Math.Max( Math.Max(col.R,col.G),col.B),
delta_max = max-min;
HSV ret=new HSV(0,0,0);
ret._v=max;
if (delta_max==0.0)
{
ret._h=0.0;
ret._s=0.0;
}
else
{
ret._s=delta_max/max;
double del_R=(((max-col.R)/6.0)+(delta_max/2.0))/delta_max;
double del_G=(((max-col.G)/6.0)+(delta_max/2.0))/delta_max;
double del_B=(((max-col.B)/6.0)+(delta_max/2.0))/delta_max;
if (col.R==max) ret._h = del_B-del_G;
else if (col.G==max) ret._h = (1.0/3.0)+del_R-del_B;
else if (col.B==max) ret._h = (2.0/3.0)+del_G-del_R;
if (ret._h<0.0)ret._h+=1.0;
if (ret._h>1.0)ret._h-=1.0;
}
return ret;
}
private void panelColor_Click(object sender, EventArgs e)
{
if (_discreteColors)
{
using (DiscreteColorPicker dcp = new DiscreteColorPicker())
{
dcp.ValidColors = _validDiscreteColors;
dcp.SingleColorOnly = true;
dcp.SelectedColors = new List<Color> { Color };
DialogResult result = dcp.ShowDialog();
if (result == DialogResult.OK)
{
if (dcp.SelectedColors.Count() == 0)
{
Color = Color.White;
}
else
{
RGBColor = dcp.SelectedColors.First();
}
}
}
}
else
{
using (ColorPicker cp = new ColorPicker())
{
cp.LockValue_V = false;
cp.Color = XYZ.FromRGB(Color);
DialogResult result = cp.ShowDialog();
if (result == DialogResult.OK)
{
RGBColor = cp.Color.ToRGB();
}
}
}
}
public SetLevelData()
{
level = 1;
color = Color.White;
}
public static HSV FromRGB(RGB col)
{
return(FromRGB(col.R, col.G, col.B));
}
public static double VFromRgb(RGB col)
{
double max = Math.Max(Math.Max(col.R, col.G), col.B);
return(max);
}
public static double VFromRgb(RGB col)
{
double max = Math.Max(Math.Max(col.R, col.G), col.B);
return max;
}
public static void FromRGB(RGB col, out double hue, out double saturation, out double value)
{
double
min = Math.Min(Math.Min(col.R, col.G), col.B),
max = Math.Max(Math.Max(col.R, col.G), col.B),
delta_max = max - min;
var s = 0.0d;
var h = 0.0d;
if (delta_max != 0.0)
{
s = delta_max / max;
double del_R = (((max - col.R) / 6.0) + (delta_max / 2.0)) / delta_max;
double del_G = (((max - col.G) / 6.0) + (delta_max / 2.0)) / delta_max;
double del_B = (((max - col.B) / 6.0) + (delta_max / 2.0)) / delta_max;
if (col.R == max) h = del_B - del_G;
else if (col.G == max) h = (1.0 / 3.0) + del_R - del_B;
else if (col.B == max) h = (2.0 / 3.0) + del_G - del_R;
if (h < 0.0) h += 1.0;
if (h > 1.0) h -= 1.0;
}
hue = h;
saturation = s;
value = max;
}
public static HSV FromRGB(RGB col)
{
return FromRGB(col.R, col.G, col.B);
}