BitmapDataExtensionsBeginClone(IReadableBitmapData, KnownPixelFormat, WorkingColorSpace, Color32, Byte, NullableRectangle, AsyncConfig) Method

public static IAsyncResult BeginClone(
	this IReadableBitmapData source,
	KnownPixelFormat pixelFormat,
	WorkingColorSpace workingColorSpace,
	Color32 backColor = default,
	byte alphaThreshold = 128,
	Rectangle? sourceRectangle = null,
	AsyncConfig? asyncConfig = null
)

<ExtensionAttribute>
Public Shared Function BeginClone ( 
	source As IReadableBitmapData,
	pixelFormat As KnownPixelFormat,
	workingColorSpace As WorkingColorSpace,
	Optional backColor As Color32 = Nothing,
	Optional alphaThreshold As Byte = 128,
	Optional sourceRectangle As Rectangle? = Nothing,
	Optional asyncConfig As AsyncConfig = Nothing
) As IAsyncResult

public:
[ExtensionAttribute]
static IAsyncResult^ BeginClone(
	IReadableBitmapData^ source, 
	KnownPixelFormat pixelFormat, 
	WorkingColorSpace workingColorSpace, 
	Color32 backColor = Color32(), 
	unsigned char alphaThreshold = 128, 
	Nullable<Rectangle> sourceRectangle = nullptr, 
	AsyncConfig^ asyncConfig = nullptr
)

[<ExtensionAttribute>]
static member BeginClone : 
        source : IReadableBitmapData * 
        pixelFormat : KnownPixelFormat * 
        workingColorSpace : WorkingColorSpace * 
        ?backColor : Color32 * 
        ?alphaThreshold : byte * 
        ?sourceRectangle : Nullable<Rectangle> * 
        ?asyncConfig : AsyncConfig 
(* Defaults:
        let _backColor = defaultArg backColor new Color32()
        let _alphaThreshold = defaultArg alphaThreshold 128
        let _sourceRectangle = defaultArg sourceRectangle null
        let _asyncConfig = defaultArg asyncConfig null
*)
-> IAsyncResult 

Parameters

source  IReadableBitmapData

An IReadableBitmapData instance to be cloned.

pixelFormat  KnownPixelFormat

The desired pixel format of the result.

workingColorSpace  WorkingColorSpace

Specifies the value of the WorkingColorSpace property of the cloned instance and affects the possible blending operations during the cloning.

backColor  Color32  (Optional)

If pixelFormat does not support alpha or supports only single-bit alpha, then specifies the color of the background. Source pixels with alpha, which will be opaque in the result will be blended with this color. The Color32.A property of the background color is ignored. This parameter is optional.
Default value: The default value of the Color32 type, which has the same RGB values as Black.

alphaThreshold  Byte  (Optional)

If pixelFormat can represent only single-bit alpha or pixelFormat is an indexed format and the target palette contains a transparent color, then specifies a threshold value for the Color32.A property, under which the color is considered transparent. If 0, then the result will not have transparent pixels. This parameter is optional.
Default value: 128.

sourceRectangle  NullableRectangle  (Optional)

A Rectangle that specifies the portion of the source to be cloned, or to clone the entire source. This parameter is optional.
Default value: .

asyncConfig  AsyncConfig  (Optional)

The configuration of the asynchronous operation such as parallelization, cancellation, reporting progress, etc. When Progress is set in this parameter, then this library always passes a DrawingOperation instance to the generic methods of the IAsyncProgress interface. This parameter is optional.
Default value: .

Return Value

Usage Note

In .NET Framework 4.0 and above you can use also the CloneAsync(IReadableBitmapData, KnownPixelFormat, Color32, Byte, NullableRectangle, TaskConfig) method.

To get the result or the exception that occurred during the operation you have to call the EndClone method.

This method is not a blocking call even if the MaxDegreeOfParallelism property of the asyncConfig parameter is 1.

Reference