BitmapDataExtensionsBeginDrawInto(IReadableBitmapData, IReadWriteBitmapData, NullableRectangle, NullablePoint, IQuantizer, IDitherer, AsyncConfig) Method

Begins to draw the source IReadableBitmapData into the target IReadWriteBitmapData asynchronously, without scaling, using blending. This method always preserves the source size in pixels, works between any pair of source and target KnownPixelFormats and supports quantizing and dithering. For scaling use the BeginDrawInto(IReadableBitmapData, IReadWriteBitmapData, Rectangle, Rectangle, IQuantizer, IDitherer, ScalingMode, AsyncConfig) overload. To copy a bitmap data into another one without blending use the BeginCopyTo method instead.


Namespace: KGySoft.Drawing.Imaging
Assembly: KGySoft.Drawing.Core (in KGySoft.Drawing.Core.dll) Version: 8.1.0
public static IAsyncResult BeginDrawInto(
	this IReadableBitmapData source,
	IReadWriteBitmapData target,
	Rectangle? sourceRectangle = null,
	Point? targetLocation = null,
	IQuantizer? quantizer = null,
	IDitherer? ditherer = null,
	AsyncConfig? asyncConfig = null


source  IReadableBitmapData
The source IReadableBitmapData to be drawn into the target.
target  IReadWriteBitmapData
The target IReadWriteBitmapData into which source should be drawn.
sourceRectangle  NullableRectangle  (Optional)
A Rectangle that specifies the portion of the source to be drawn into the target, or to draw the entire source. This parameter is optional.
Default value: .
targetLocation  NullablePoint  (Optional)
A Point that specifies the target location, or top draw the source to the top-left corner of the target. Target size will be always the same as the source size. This parameter is optional.
Default value: .
quantizer  IQuantizer  (Optional)
An IQuantizer instance to be used for the drawing. If not specified, then the drawing operation might automatically pick a quantizer based on target PixelFormat. This parameter is optional.
Default value: .
ditherer  IDitherer  (Optional)
The ditherer to be used for the drawing. Might be ignored if quantizer is not specified and target PixelFormat format has at least 24 bits-per-pixel size. 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

An IAsyncResult that represents the asynchronous operation, which could still be pending.

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).


In .NET Framework 4.0 and above you can use also the DrawIntoAsync(IReadableBitmapData, IReadWriteBitmapData, NullableRectangle, NullablePoint, IQuantizer, IDitherer, TaskConfig) method.

To finish the operation and to get the exception that occurred during the operation you have to call the EndDrawInto method.

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


ArgumentNullExceptionsource or target is .

See Also