feat: Implement GetColorNameResourceId

unoplatform · Sep 2, 2024 · d494270 · d494270
1 parent 5e64bca
commit d494270
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diff --git a/src/Uno.UI/UI/ColorHelper.cs b/src/Uno.UI/UI/ColorHelper.cs
@@ -73,4 +73,347 @@ public static WindowsColor FromARGB(byte a, byte r, byte g, byte b)
 	/// <returns>The generated Color value.</returns>
 	public static WindowsColor FromArgb(byte a, byte r, byte g, byte b)
 		=> WindowsColor.FromArgb(a, r, g, b);
+
+	#region Resource IDs Lookup Tables
+	private static ReadOnlySpan<int> HueLimitsForSatLevel4 =>
+	[
+		0,
+		11,
+		26,
+		0,
+		0,
+		38,
+		45,
+		0,
+		0,
+		56,
+		100,
+		121,
+		129,
+		0,
+		140,
+		0,
+		180,
+		0,
+		0,
+		224,
+		241,
+		0,
+		256
+	];
+
+	private static ReadOnlySpan<int> HueLimitsForSatLevel5 =>
+	[
+		0,
+		13,
+		27,
+		0,
+		0,
+		36,
+		45,
+		0,
+		0,
+		59,
+		118,
+		0,
+		127,
+		136,
+		142,
+		0,
+		185,
+		0,
+		0,
+		216,
+		239,
+		0,
+		256
+	];
+
+	private static ReadOnlySpan<int> HueLimitsForSatLevel3 =>
+	[
+		0,
+		8,
+		0,
+		0,
+		39,
+		46,
+		0,
+		0,
+		0,
+		71,
+		120,
+		0,
+		131,
+		144,
+		0,
+		0,
+		163,
+		0,
+		177,
+		211,
+		249,
+		0,
+		256
+	];
+
+	private static ReadOnlySpan<int> HueLimitsForSatLevel2 =>
+	[
+		0,
+		10,
+		0,
+		32,
+		46,
+		0,
+		0,
+		0,
+		61,
+		0,
+		106,
+		0,
+		136,
+		144,
+		0,
+		0,
+		0,
+		158,
+		166,
+		241,
+		0,
+		0,
+		256
+	];
+
+	private static ReadOnlySpan<int> HueLimitsForSatLevel1 =>
+	[
+		8,
+		0,
+		0,
+		44,
+		0,
+		0,
+		0,
+		63,
+		0,
+		0,
+		122,
+		0,
+		134,
+		0,
+		0,
+		0,
+		0,
+		166,
+		176,
+		241,
+		0,
+		256,
+		0
+	];
+
+	private static ReadOnlySpan<int> LumLimitsForHueIndexHigh =>
+	[
+		170,
+		170,
+		170,
+		155,
+		170,
+		170,
+		170,
+		170,
+		170,
+		115,
+		170,
+		170,
+		170,
+		170,
+		170,
+		170,
+		170,
+		170,
+		150,
+		150,
+		170,
+		140,
+		165
+	];
+
+	private static ReadOnlySpan<int> LumLimitsForHueIndexLow =>
+	[
+		130,
+		100,
+		115,
+		100,
+		100,
+		100,
+		110,
+		75,
+		100,
+		90,
+		100,
+		100,
+		100,
+		100,
+		80,
+		100,
+		100,
+		100,
+		100,
+		100,
+		100,
+		100,
+		100
+	];
+
+	private static ReadOnlySpan<uint> ColorNamesMid =>
+	[
+		5119,
+		5135,
+		5136,
+		5137,
+		5122,
+		5138,
+		5139,
+		5140,
+		5140,
+		5141,
+		5141,
+		5142,
+		5143,
+		5126,
+		5144,
+		5129,
+		5145,
+		5146,
+		5147,
+		5148,
+		5134,
+		5137,
+		5135
+	];
+
+	private static ReadOnlySpan<uint> ColorNamesDark =>
+	[
+		5137,
+		5149,
+		5137,
+		5137,
+		5137,
+		5150,
+		5150,
+		5137,
+		5151,
+		5151,
+		5151,
+		5151,
+		5152,
+		5152,
+		5152,
+		5153,
+		5153,
+		5146,
+		5147,
+		5154,
+		5155,
+		5137,
+		5149
+	];
+
+	private static ReadOnlySpan<uint> ColorNamesLight =>
+	[
+		5119,
+		5120,
+		5121,
+		5122,
+		5122,
+		5123,
+		5123,
+		5122,
+		5124,
+		5125,
+		5124,
+		5124,
+		5126,
+		5127,
+		5128,
+		5129,
+		5130,
+		5131,
+		5132,
+		5133,
+		5134,
+		5122,
+		5120
+	];
+	#endregion
+
+	private unsafe static uint GetColorNameResourceId(WindowsColor color)
+	{
+		var hsl = color.ToHsl();
+		double h = hsl.H * 255.0;
+		double s = hsl.S * 255.0;
+		double l = hsl.L * 255.0;
+
+		if (l > 240.0)
+		{
+			return 5114;
+		}
+
+		if (l < 20.0)
+		{
+			return 5118;
+		}
+
+		if (s > 20.0)
+		{
+			ReadOnlySpan<int> hueLimits;
+
+			if (s > 240.0)
+			{
+				hueLimits = HueLimitsForSatLevel5;
+			}
+			else if (s > 150.0)
+			{
+				hueLimits = HueLimitsForSatLevel4;
+			}
+			else if (s > 115.0)
+			{
+				hueLimits = HueLimitsForSatLevel3;
+			}
+			else if (s > 75.0)
+			{
+				hueLimits = HueLimitsForSatLevel2;
+			}
+			else
+			{
+				hueLimits = HueLimitsForSatLevel1;
+			}
+
+			var hueIndex = 0;
+			while (hueIndex < 23 && hueLimits[hueIndex] <= h)
+			{
+				hueIndex++;
+			}
+
+			if (l > LumLimitsForHueIndexHigh[hueIndex])
+			{
+				return ColorNamesLight[hueIndex];
+			}
+			else if (l >= LumLimitsForHueIndexLow[hueIndex])
+			{
+				return ColorNamesMid[hueIndex];
+			}
+			else
+			{
+				return ColorNamesDark[hueIndex];
+			}
+		}
+		else if (l <= 170.0)
+		{
+			return (l <= 100.0) ? (uint)5117 : 5116;
+		}
+		else
+		{
+			return 5115;
+		}
+	}
 }