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/////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) Rick Brewster, Tom Jackson, and past contributors. //
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// Portions Copyright (C) Microsoft Corporation. All Rights Reserved. //
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// See src/Resources/Files/License.txt for full licensing and attribution //
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/////////////////////////////////////////////////////////////////////////////////
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/// "A Primer on Building a Color Picker User Control with GDI+ in Visual Basic .NET or C#"
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/// http://www.msdnaa.net/Resources/display.aspx?ResID=2460
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public struct HsvColor
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public int Hue; // 0-360
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public int Saturation; // 0-100
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public int Value; // 0-100
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public static bool operator== (HsvColor lhs, HsvColor rhs)
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if ((lhs.Hue == rhs.Hue) &&
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(lhs.Saturation == rhs.Saturation) &&
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(lhs.Value == rhs.Value))
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public static bool operator!= (HsvColor lhs, HsvColor rhs)
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public override bool Equals(object obj)
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return this == (HsvColor)obj;
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public override int GetHashCode()
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return (Hue + (Saturation << 8) + (Value << 16)).GetHashCode();;
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public HsvColor(int hue, int saturation, int value)
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if (hue < 0 || hue > 360)
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throw new ArgumentOutOfRangeException("hue", "must be in the range [0, 360]");
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if (saturation < 0 || saturation > 100)
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throw new ArgumentOutOfRangeException("saturation", "must be in the range [0, 100]");
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if (value < 0 || value > 100)
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throw new ArgumentOutOfRangeException("value", "must be in the range [0, 100]");
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Saturation = saturation;
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// public static HsvColor FromColor(Color color)
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// RgbColor rgb = new RgbColor(color.R, color.G, color.B);
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// return rgb.ToHsv();
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// public Color ToColor()
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// RgbColor rgb = ToRgb();
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// return Color.FromArgb(rgb.Red, rgb.Green, rgb.Blue);
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public RgbColor ToRgb()
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// HsvColor contains values scaled as in the color wheel:
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// Scale Hue to be between 0 and 360. Saturation
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// and value scale to be between 0 and 1.
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h = (double) Hue % 360;
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s = (double) Saturation / 100;
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v = (double) Value / 100;
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// If s is 0, all colors are the same.
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// This is some flavor of gray.
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double fractionalSector;
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// The color wheel consists of 6 sectors.
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// Figure out which sector you're in.
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sectorNumber = (int)(Math.Floor(sectorPos));
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// get the fractional part of the sector.
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// That is, how many degrees into the sector
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fractionalSector = sectorPos - sectorNumber;
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// Calculate values for the three axes
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q = v * (1 - (s * fractionalSector));
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t = v * (1 - (s * (1 - fractionalSector)));
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// Assign the fractional colors to r, g, and b
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// based on the sector the angle is in.
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switch (sectorNumber)
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// return an RgbColor structure, with values scaled
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// to be between 0 and 255.
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return new RgbColor((int)(r * 255), (int)(g * 255), (int)(b * 255));
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public override string ToString()
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return String.Format("({0}, {1}, {2})", Hue, Saturation, Value);
added
removed
Pinta.Core/Effects/HsvColor.cs
