WriteableBitmapExtensionsGetWritableBitmapData(WriteableBitmap, WorkingColorSpace, Color, Byte) Method

public static IWritableBitmapData GetWritableBitmapData(
	this WriteableBitmap bitmap,
	WorkingColorSpace workingColorSpace,
	Color backColor = default,
	byte alphaThreshold = 128
)

<ExtensionAttribute>
Public Shared Function GetWritableBitmapData ( 
	bitmap As WriteableBitmap,
	workingColorSpace As WorkingColorSpace,
	Optional backColor As Color = Nothing,
	Optional alphaThreshold As Byte = 128
) As IWritableBitmapData

public:
[ExtensionAttribute]
static IWritableBitmapData^ GetWritableBitmapData(
	WriteableBitmap^ bitmap, 
	WorkingColorSpace workingColorSpace, 
	Color backColor = Color(), 
	unsigned char alphaThreshold = 128
)

[<ExtensionAttribute>]
static member GetWritableBitmapData : 
        bitmap : WriteableBitmap * 
        workingColorSpace : WorkingColorSpace * 
        ?backColor : Color * 
        ?alphaThreshold : byte 
(* Defaults:
        let _backColor = defaultArg backColor new Color()
        let _alphaThreshold = defaultArg alphaThreshold 128
*)
-> IWritableBitmapData 

Parameters

bitmap  WriteableBitmap

A WriteableBitmap instance, whose data is about to be accessed.

workingColorSpace  WorkingColorSpace

Specifies the preferred color space that should be used when working with the result bitmap data. Determines the behavior of some operations such as setting pixels with transparency when the pixel format of the source bitmap does not support transparency or alpha gradient. See also the backColor and alphaThreshold parameters.
See the Remarks section of the WorkingColorSpace enumeration for more details.

backColor  Color  (Optional)

When setting pixels of indexed bitmaps and bitmaps without alpha support, specifies the color of the background. Color values with alpha, which are considered opaque will be blended with this color before setting the pixel in the result bitmap data. The alpha value (Color.A property) of the specified background color is ignored. This parameter is optional.
Default value: The bitwise zero instance of Color, which has the same RGB values as Black.

alphaThreshold  Byte  (Optional)

When setting pixels of bitmaps with a palette that has a transparent color, then specifies a threshold value for the Color.A property, under which the color is considered transparent. If 0, then the pixels to be set will never be transparent. This parameter is optional.
Default value: 128.

Return Value

Usage Note

Reference