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Limit minimum brightness of combo colours

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This commit is contained in:
Dan Balasescu
2022-10-05 17:50:36 +09:00
parent d9c3f5834c
commit 4149235e63
4 changed files with 189 additions and 2 deletions
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167
osu.Game/Graphics/OsuColour.cs
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@ -229,6 +229,173 @@ namespace osu.Game.Graphics
return Gray(brightness > 0.5f ? 0.2f : 0.9f);
}
/// <summary>
/// Converts RGBA to HSPA.
/// </summary>
public static Color4 ToHSPA(Color4 colour)
{
const float p_r = 0.299f;
const float p_g = 0.587f;
const float p_b = 0.114f;
Color4 result = new Color4
{
A = colour.A,
B = MathF.Sqrt(colour.R * colour.R * p_r + colour.G * colour.G * p_g + colour.B + colour.B * p_b)
};
if (colour.R == colour.G && colour.R == colour.B)
return result;
if (colour.R >= colour.G && colour.R >= colour.B)
{
if (colour.B >= colour.G)
{
result.R = 6f / 6f - 1f / 6f * (colour.B - colour.G) / (colour.R - colour.G);
result.G = 1f - colour.G / colour.R;
}
else
{
result.R = 0f / 6f + 1f / 6f * (colour.G - colour.B) / (colour.R - colour.B);
result.G = 1f - colour.B / colour.R;
}
}
else if (colour.G >= colour.R && colour.G >= colour.B)
{
if (colour.R >= colour.B)
{
result.R = 2f / 6f - 1f / 6f * (colour.R - colour.B) / (colour.G - colour.B);
result.G = 1f - colour.B / colour.G;
}
else
{
result.R = 2f / 6f + 1f / 6f * (colour.B - colour.R) / (colour.G - colour.R);
result.G = 1f - colour.R / colour.G;
}
}
else
{
if (colour.G >= colour.R)
{
result.R = 4f / 6f - 1f / 6f * (colour.G - colour.R) / (colour.B - colour.R);
result.G = 1f - colour.R / colour.B;
}
else
{
result.R = 4f / 6f + 1f / 6f * (colour.R - colour.G) / (colour.B - colour.G);
result.G = 1f - colour.G / colour.B;
}
}
return result;
}
public static Color4 FromHSPA(Color4 colour)
{
const float p_r = 0.299f;
const float p_g = 0.587f;
const float p_b = 0.114f;
float minOverMax = 1f - colour.G;
Color4 result = new Color4 { A = colour.A };
if (minOverMax > 0f)
{
float part = 1f + colour.R * (1f / minOverMax - 1f);
if (colour.R < 1f / 6f)
{
colour.R = 6f * (colour.R - 0f / 6f);
result.B = colour.B / MathF.Sqrt(p_r / minOverMax / minOverMax + p_g * part * part + p_b);
result.R = result.B / minOverMax;
result.G = result.B + colour.R * (result.R - result.B);
}
else if (colour.R < 2f / 6f)
{
colour.R = 6f * (-colour.R + 2f / 6f);
result.B = colour.B / MathF.Sqrt(p_g / minOverMax / minOverMax + p_r * part * part + p_b);
result.G = result.B / minOverMax;
result.R = result.B + colour.R * (result.R - result.B);
}
else if (colour.R < 3f / 6f)
{
colour.R = 6f * (colour.R - 2f / 6f);
result.R = colour.B / MathF.Sqrt(p_g / minOverMax / minOverMax + p_b * part * part + p_r);
result.G = result.R / minOverMax;
result.B = result.R + colour.R * (result.G - result.R);
}
else if (colour.R < 4f / 6f)
{
colour.R = 6f * (-colour.R + 4f / 6f);
result.R = colour.B / MathF.Sqrt(p_b / minOverMax / minOverMax + p_g * part * part + p_r);
result.B = result.R / minOverMax;
result.G = result.R + colour.R * (result.B - result.R);
}
else if (colour.R < 5f / 6f)
{
colour.R = 6f * (colour.R - 4f / 6f);
result.G = colour.B / MathF.Sqrt(p_b / minOverMax / minOverMax + p_r * part * part + p_g);
result.B = result.G / minOverMax;
result.R = result.G + colour.R * (result.B - result.G);
}
else
{
colour.R = 6f * (-colour.R + 6f / 6f);
result.G = colour.B / MathF.Sqrt(p_r / minOverMax / minOverMax + p_b * part * part + p_g);
result.R = result.G / minOverMax;
result.B = result.G + colour.R * (result.R - result.G);
}
}
else
{
if (colour.R < 1f / 6f)
{
colour.R = 6f * (colour.R - 0f / 6f);
result.R = MathF.Sqrt(colour.B * colour.B / (p_r + p_g * colour.R * colour.R));
result.G = result.R * colour.R;
result.B = 0f;
}
else if (colour.R < 2f / 6f)
{
colour.R = 6f * (-colour.R + 2f / 6f);
result.G = MathF.Sqrt(colour.B * colour.B / (p_g + p_r * colour.R * colour.R));
result.R = result.G * colour.R;
result.B = 0f;
}
else if (colour.R < 3f / 6f)
{
colour.R = 6f * (colour.R - 2f / 6f);
result.G = MathF.Sqrt(colour.B * colour.B / (p_g + p_b * colour.R * colour.R));
result.B = result.G * colour.R;
result.R = 0f;
}
else if (colour.R < 4f / 6f)
{
colour.R = 6f * (-colour.R + 4f / 6f);
result.B = MathF.Sqrt(colour.B * colour.B / (p_b + p_g * colour.R * colour.R));
result.G = result.B * colour.R;
result.R = 0f;
}
else if (colour.R < 5f / 6f)
{
colour.R = 6f * (colour.R - 4f / 6f);
result.B = MathF.Sqrt(colour.B * colour.B / (p_b + p_r * colour.R * colour.R));
result.R = result.B * colour.R;
result.G = 0f;
}
else
{
colour.R = 6f * (-colour.R + 6f / 6f);
result.R = MathF.Sqrt(colour.B * colour.B / (p_r + p_b * colour.R * colour.R));
result.B = result.R * colour.R;
result.G = 0f;
}
}
return result;
}
public readonly Color4 TeamColourRed = Color4Extensions.FromHex("#AA1414");
public readonly Color4 TeamColourBlue = Color4Extensions.FromHex("#1462AA");