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Add To/From sRGB methods to Color4.

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This commit is contained in:
Fraser Waters 2014-11-10 01:59:53 +01:00
parent f8af961d54
commit af924afef4
1 changed files with 92 additions and 0 deletions
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92
Source/OpenTK/Graphics/Color4.cs
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@ -914,6 +914,98 @@ namespace OpenTK.Graphics
#endregion
#region Color conversions
#region sRGB
/// <summary>
/// Converts sRGB color values to RGB color values.
/// </summary>
/// <returns>
/// Returns the converted color value.
/// </returns>
/// <param name="srgb">
/// Color value to convert in sRGB.
/// </param>
public static Color4 FromSrgb(Color4 srgb)
{
float r, g, b;
if (srgb.R <= 0.04045f)
{
r = srgb.R / 12.92f;
}
else
{
r = (float)Math.Pow((srgb.R + 0.055f) / (1.0f + 0.055f), 2.4f);
}
if (srgb.G <= 0.04045f)
{
g = srgb.G / 12.92f;
}
else
{
g = (float)Math.Pow((srgb.G + 0.055f) / (1.0f + 0.055f), 2.4f);
}
if (srgb.B <= 0.04045f)
{
b = srgb.B / 12.92f;
}
else
{
b = (float)Math.Pow((srgb.B + 0.055f) / (1.0f + 0.055f), 2.4f);
}
return new Color4(r, g, b, srgb.A);
}
/// <summary>
/// Converts RGB color values to sRGB color values.
/// </summary>
/// <returns>
/// Returns the converted color value.
/// </returns>
/// <param name="rgb">Color value to convert.</param>
public static Color4 ToSrgb(Color4 rgb)
{
float r, g, b;
if (rgb.R <= 0.0031308)
{
r = 12.92f * rgb.R;
}
else
{
r = (1.0f + 0.055f) * (float)Math.Pow(rgb.R, 1.0f / 2.4f) - 0.055f;
}
if (rgb.G <= 0.0031308)
{
g = 12.92f * rgb.G;
}
else
{
g = (1.0f + 0.055f) * (float)Math.Pow(rgb.G, 1.0f / 2.4f) - 0.055f;
}
if (rgb.B <= 0.0031308)
{
b = 12.92f * rgb.B;
}
else
{
b = (1.0f + 0.055f) * (float)Math.Pow(rgb.B, 1.0f / 2.4f) - 0.055f;
}
return new Color4(r, g, b, rgb.A);
}
#endregion
#endregion
#region IEquatable<Color4> Members
/// <summary>