Palette(IEnumerableColor, WorkingColorSpace, Color, Byte, FuncColor32, IPalette, Int32) Constructor

public Palette(
	IEnumerable<Color> entries,
	WorkingColorSpace workingColorSpace,
	Color backColor = default,
	byte alphaThreshold = 128,
	Func<Color32, IPalette, int>? customGetNearestColorIndex = null
)

Public Sub New ( 
	entries As IEnumerable(Of Color),
	workingColorSpace As WorkingColorSpace,
	Optional backColor As Color = Nothing,
	Optional alphaThreshold As Byte = 128,
	Optional customGetNearestColorIndex As Func(Of Color32, IPalette, Integer) = Nothing
)

public:
Palette(
	IEnumerable<Color>^ entries, 
	WorkingColorSpace workingColorSpace, 
	Color backColor = Color(), 
	unsigned char alphaThreshold = 128, 
	Func<Color32, IPalette^, int>^ customGetNearestColorIndex = nullptr
)

new : 
        entries : IEnumerable<Color> * 
        workingColorSpace : WorkingColorSpace * 
        ?backColor : Color * 
        ?alphaThreshold : byte * 
        ?customGetNearestColorIndex : Func<Color32, IPalette, int> 
(* Defaults:
        let _backColor = defaultArg backColor new Color()
        let _alphaThreshold = defaultArg alphaThreshold 128
        let _customGetNearestColorIndex = defaultArg customGetNearestColorIndex null
*)
-> Palette

Parameters

entries  IEnumerableColor

The color entries to be stored by this Palette instance. They will be converted to Color32 instances internally.

workingColorSpace  WorkingColorSpace

Specifies the desired color space to be used by the GetNearestColor and GetNearestColorIndex methods for blending and measuring color distance. If customGetNearestColorIndex is set, then it depends on the custom lookup function whether it respects the value of this parameter.

backColor  Color  (Optional)

If entries does not contain partially transparent colors, then specifies the background color for lookup operations (GetNearestColor, GetNearestColorIndex). When a lookup is performed with a color, whose Color32.A field is equal to or greater than alphaThreshold, and there is no exact match among the entries, then the color to be found will be blended with this color before performing the lookup. The Color.A property of the background color is ignored. This parameter is optional.
Default value: Empty, which has the same RGB values as Black.

alphaThreshold  Byte  (Optional)

If there is at least one completely transparent color among entries, then specifies a threshold value for the Color32.A field, under which lookup operations will return the first transparent color (GetNearestColor) or the index of the first transparent color (GetNearestColorIndex). This parameter is optional.
Default value: 128.

customGetNearestColorIndex  FuncColor32, IPalette, Int32  (Optional)

A delegate specifying an optional custom lookup logic to obtain an index from entries by a Color32 instance. If specified, it must be thread-safe, and it is expected to be fast. The results returned by the specified delegate are not cached. If , then GetNearestColor and GetNearestColorIndex methods will perform a sequential lookup by using a default logic and results will be cached.

Reference