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20 lines
744 B
C#
20 lines
744 B
C#
using System;
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using System.Windows.Media;
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namespace Sheas_Cealer.Utils;
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internal static class ForegroundGenerator
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{
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internal static Color? GetForeground(int red, int green, int blue)
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{
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double luminance = 0.2126 * GammaCorrect(red / 255.0) + 0.7152 * GammaCorrect(green / 255.0) + 0.0722 * GammaCorrect(blue / 255.0);
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double blackContrast = (luminance + 0.05) / 0.05;
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double whiteContrast = 1.05 / (luminance + 0.05);
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return blackContrast >= 4 && whiteContrast >= 3 ? null :
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blackContrast >= whiteContrast ? Color.FromRgb(0, 0, 0) : Color.FromRgb(255, 255, 255);
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}
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private static double GammaCorrect(double c) => c <= 0.03928 ? c / 12.92 : Math.Pow((c + 0.055) / 1.055, 2.4);
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} |