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Move foreground colour helper into OsuColour

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This commit is contained in:
Bartłomiej Dach
2021-04-19 18:24:15 +02:00
parent 97573fb11d
commit 0825fc57a9
4 changed files with 14 additions and 27 deletions
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12
osu.Game/Graphics/OsuColour.cs
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@ -94,6 +94,18 @@ namespace osu.Game.Graphics
}
}
/// <summary>
/// Returns a foreground text colour that is supposed to contrast well with
/// the supplied <paramref name="backgroundColour"/>.
/// </summary>
public static Color4 ForegroundTextColourFor(Color4 backgroundColour)
{
// formula taken from the RGB->YIQ conversions: https://en.wikipedia.org/wiki/YIQ
// brightness here is equivalent to the Y component in the above colour model, which is a rough estimate of lightness.
float brightness = 0.299f * backgroundColour.R + 0.587f * backgroundColour.G + 0.114f * backgroundColour.B;
return Gray(brightness > 0.5f ? 0.2f : 0.9f);
}
// See https://github.com/ppy/osu-web/blob/master/resources/assets/less/colors.less
public readonly Color4 PurpleLighter = Color4Extensions.FromHex(@"eeeeff");
public readonly Color4 PurpleLight = Color4Extensions.FromHex(@"aa88ff");

3
osu.Game/Graphics/UserInterfaceV2/ColourDisplay.cs
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@ -10,7 +10,6 @@ using osu.Framework.Graphics.Shapes;
using osu.Framework.Graphics.UserInterface;
using osu.Framework.Localisation;
using osu.Game.Graphics.Sprites;
using osu.Game.Utils;
using osuTK;
using osuTK.Graphics;
@ -102,7 +101,7 @@ namespace osu.Game.Graphics.UserInterfaceV2
{
fill.Colour = current.Value;
colourHexCode.Text = current.Value.ToHex();
colourHexCode.Colour = ColourUtils.ForegroundTextColourFor(current.Value);
colourHexCode.Colour = OsuColour.ForegroundTextColourFor(current.Value);
}
}
}