BitmapDataExtensionsClone(IReadableBitmapData, IAsyncContext, KnownPixelFormat, IQuantizer, IDitherer, NullableRectangle) Method

Gets the clone of the specified portion of source with the specified pixelFormat, using an optional quantizer and ditherer inside of an already created, possibly asynchronous context.


Namespace: KGySoft.Drawing.Imaging
Assembly: KGySoft.Drawing.Core (in KGySoft.Drawing.Core.dll) Version: 8.0.0-preview.1
public static IReadWriteBitmapData? Clone(
	this IReadableBitmapData source,
	IAsyncContext? context,
	KnownPixelFormat pixelFormat,
	IQuantizer? quantizer,
	IDitherer? ditherer = null,
	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.
quantizer  IQuantizer
An optional IQuantizer instance to determine the colors of the result. If and pixelFormat is an indexed format, then a default palette and quantization logic will be used.
ditherer  IDitherer  (Optional)
The ditherer to be used. Might be ignored if quantizer is not specified and pixelFormat represents an at least 24 bits-per-pixel size. This parameter is optional.
Default value: .
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.
ArgumentExceptionquantizer uses a palette with too many colors for the specified pixelFormat.

See Also