BitmapDataExtensionsClone(IReadableBitmapData, IAsyncContext, KnownPixelFormat, WorkingColorSpace, Color32, Byte, NullableRectangle) Method

Gets the clone of the specified portion of source with the specified pixelFormat and color settings inside of an already created, possibly asynchronous context.


Namespace: KGySoft.Drawing.Imaging
Assembly: KGySoft.Drawing.Core (in KGySoft.Drawing.Core.dll) Version: 8.1.0
public static IReadWriteBitmapData? Clone(
	this IReadableBitmapData source,
	IAsyncContext? context,
	KnownPixelFormat pixelFormat,
	WorkingColorSpace workingColorSpace,
	Color32 backColor = default,
	byte alphaThreshold = 128,
	Rectangle? sourceRectangle = null


source  IReadableBitmapData
An IReadableBitmapData instance to be cloned.
context  IAsyncContext
An IAsyncContext instance that contains information for asynchronous processing about the current operation.
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 whole source. This parameter is optional.
Default value: .

Return Value

An IReadWriteBitmapData instance that represents the clone of the specified source, or , if the operation was canceled.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IReadableBitmapData. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).


This method blocks the caller thread but if context belongs to an async top level method, then the execution may already run on a pool thread. Degree of parallelism, the ability of cancellation and reporting progress depend on how these were configured at the top level method.

When reporting progress, this library always passes a DrawingOperation instance to the generic methods of the IAsyncProgress interface.


See the Examples section of the AsyncHelper class for details about how to create a context for possibly async top level methods.


ArgumentNullExceptionsource is .
ArgumentOutOfRangeExceptionpixelFormat does not specify a valid format.
sourceRectangle has no overlapping region with source bounds.

See Also