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Add fields for RGBA as Int32 and HSL color support

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This commit is contained in:
Michael Becker 2016-06-17 00:18:59 -04:00
parent f23e43a833
commit db68700d40
1 changed files with 162 additions and 0 deletions
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162
CSharp/Plugins/UniversalEditor.Plugins.Multimedia/Color.cs
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@ -9,15 +9,177 @@ namespace UniversalEditor
{
private double mvarRed;
public double Red { get { return mvarRed; } set { mvarRed = value; } }
public int RedInt32 { get { return (int)(mvarRed * 255); } set { mvarRed = (double)value / 255.0; } }
private double mvarGreen;
public double Green { get { return mvarGreen; } set { mvarGreen = value; } }
public int GreenInt32 { get { return (int)(mvarGreen * 255); } set { mvarGreen = (double)value / 255.0; } }
private double mvarBlue;
public double Blue { get { return mvarBlue; } set { mvarBlue = value; } }
public int BlueInt32 { get { return (int)(mvarBlue * 255); } set { mvarBlue = (double)value / 255.0; } }
private double mvarAlpha;
public double Alpha { get { return mvarAlpha; } set { mvarAlpha = value; } }
public int AlphaInt32 { get { return (int)(mvarAlpha * 255); } set { mvarAlpha = (double)value / 255.0; } }
public double Hue
{
get
{
int r = this.RedInt32;
int g = this.GreenInt32;
int b = this.BlueInt32;
byte minRGB = (byte)Math.Min (r, Math.Min (g, b));
byte maxRGB = (byte)Math.Max (r, Math.Max (g, b));
if (maxRGB == minRGB) return 0.0;
float num = (float)(maxRGB - minRGB);
float redFraction = (float)((int)maxRGB - r) / num;
float greenFraction = (float)((int)maxRGB - g) / num;
float blueFraction = (float)((int)maxRGB - b) / num;
float hue = 0f;
if (r == (int)maxRGB)
{
hue = 60f * (6f + blueFraction - greenFraction);
}
if (g == (int)maxRGB)
{
hue = 60f * (2f + redFraction - blueFraction);
}
if (b == (int)maxRGB)
{
hue = 60f * (4f + greenFraction - redFraction);
}
if (hue > 360f)
{
hue -= 360f;
}
return hue;
}
set { UpdateHSL (value, Saturation, Luminosity); }
}
public int HueInt32
{
get { return (int)(Hue * HSL_SCALE); }
set { Hue = CheckRange ((double)value / HSL_SCALE); }
}
public double Saturation
{
get
{
int minRGB = Math.Min (this.RedInt32, Math.Min (this.GreenInt32, this.BlueInt32));
int maxRGB = Math.Max (this.RedInt32, Math.Max (this.GreenInt32, this.BlueInt32));
if (maxRGB == minRGB) return 0.0;
int num = (int)(maxRGB + minRGB);
if (num > 255)
{
num = 510 - num;
}
return (double)(maxRGB - minRGB) / (double)num;
}
set { UpdateHSL (Hue, value, Luminosity); }
}
public int SaturationInt32
{
get { return (int)(Saturation * HSL_SCALE); }
set { Saturation = CheckRange ((double)value / HSL_SCALE); }
}
public double Luminosity
{
get
{
int minRGB = Math.Min (this.RedInt32, Math.Min (this.GreenInt32, this.BlueInt32));
int maxRGB = Math.Max (this.RedInt32, Math.Max (this.GreenInt32, this.BlueInt32));
return (double)(maxRGB + minRGB) / 510.0;
}
set { UpdateHSL (Hue, Saturation, value); }
}
public int LuminosityInt32
{
get { return (int)(Luminosity * HSL_SCALE); }
set { Luminosity = CheckRange ((double)value / HSL_SCALE); }
}
private void UpdateHSL(double h, double s, double l)
{
if (l != 0)
{
if (s == 0)
mvarRed = mvarGreen = mvarBlue = l;
else
{
double temp2 = GetTemp2(h, s, l);
double temp1 = 2.0 * l - temp2;
mvarRed = GetColorComponent(temp1, temp2, h + 1.0 / 3.0);
mvarGreen = GetColorComponent(temp1, temp2, h);
mvarBlue = GetColorComponent(temp1, temp2, h - 1.0 / 3.0);
}
}
}
private const double HSL_SCALE = 240.0;
private double CheckRange(double value)
{
if (value < 0.0)
value = 0.0;
else if (value > 1.0)
value = 1.0;
return value;
}
public static Color FromHSL(double h, double s, double l)
{
double r = 0, g = 0, b = 0;
if (l != 0)
{
if (s == 0)
r = g = b = l;
else
{
double temp2 = GetTemp2(h, s, l);
double temp1 = 2.0 * l - temp2;
r = GetColorComponent(temp1, temp2, h + 1.0 / 3.0);
g = GetColorComponent(temp1, temp2, h);
b = GetColorComponent(temp1, temp2, h - 1.0 / 3.0);
}
}
return Color.FromRGBA(r, g, b);
}
private static double GetColorComponent(double temp1, double temp2, double temp3)
{
temp3 = MoveIntoRange(temp3);
if (temp3 < 1.0 / 6.0)
return temp1 + (temp2 - temp1) * 6.0 * temp3;
else if (temp3 < 0.5)
return temp2;
else if (temp3 < 2.0 / 3.0)
return temp1 + ((temp2 - temp1) * ((2.0 / 3.0) - temp3) * 6.0);
else
return temp1;
}
private static double MoveIntoRange(double temp3)
{
if (temp3 < 0.0)
temp3 += 1.0;
else if (temp3 > 1.0)
temp3 -= 1.0;
return temp3;
}
private static double GetTemp2(double h, double s, double l)
{
double temp2;
if (l < 0.5) //<=??
temp2 = l * (1.0 + s);
else
temp2 = l + s - (l * s);
return temp2;
}
public static readonly Color Empty;