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Change a byte[] in KnownColorTable to be ReadOnlySpan<byte> #51719

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Apr 23, 2021
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Change a byte[] in KnownColorTable to be ReadOnlySpan<byte> #51719

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8 changes: 4 additions & 4 deletions src/libraries/Common/src/System/Drawing/KnownColorTable.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -238,7 +238,7 @@ internal static class KnownColorTable
};

// All known color kinds (in order of definition in the KnownColor enum).
public static readonly byte[] s_colorKindTable = new byte[]
public static ReadOnlySpan<byte> ColorKindTable => new byte[]
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{
// "not a known color"
KnownColorKindUnknown,
Expand Down Expand Up @@ -466,11 +466,11 @@ internal static class KnownColorTable
internal static Color ArgbToKnownColor(uint argb)
{
Debug.Assert((argb & Color.ARGBAlphaMask) == Color.ARGBAlphaMask);
Debug.Assert(s_colorValueTable.Length == s_colorKindTable.Length);
Debug.Assert(s_colorValueTable.Length == ColorKindTable.Length);

for (int index = 1; index < s_colorValueTable.Length; ++index)
{
if (s_colorKindTable[index] == KnownColorKindWeb && s_colorValueTable[index] == argb)
if (ColorKindTable[index] == KnownColorKindWeb && s_colorValueTable[index] == argb)
{
return Color.FromKnownColor((KnownColor)index);
}
Expand All @@ -484,7 +484,7 @@ public static uint KnownColorToArgb(KnownColor color)
{
Debug.Assert(color > 0 && color <= KnownColor.RebeccaPurple);

return s_colorKindTable[(int)color] == KnownColorKindSystem
return ColorKindTable[(int)color] == KnownColorKindSystem
? GetSystemColorArgb(color)
: s_colorValueTable[(int)color];
}
Expand Down
2 changes: 1 addition & 1 deletion src/libraries/System.Drawing.Primitives/src/System/Drawing/Color.cs
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Expand Up @@ -374,7 +374,7 @@ private Color(long value, short state, string? name, KnownColor knownColor)
public bool IsSystemColor => IsKnownColor && IsKnownColorSystem((KnownColor)knownColor);

internal static bool IsKnownColorSystem(KnownColor knownColor)
=> KnownColorTable.s_colorKindTable[(int)knownColor] == KnownColorTable.KnownColorKindSystem;
=> KnownColorTable.ColorKindTable[(int)knownColor] == KnownColorTable.KnownColorKindSystem;

// Used for the [DebuggerDisplay]. Inlining in the attribute is possible, but
// against best practices as the current project language parses the string with
Expand Down