BitmapDataExtensionsResize(IReadableBitmapData, IAsyncContext, Size, ScalingMode, Boolean) Method

public static IReadWriteBitmapData? Resize(
	this IReadableBitmapData source,
	IAsyncContext? context,
	Size newSize,
	ScalingMode scalingMode = ScalingMode.Auto,
	bool keepAspectRatio = false
)

<ExtensionAttribute>
Public Shared Function Resize ( 
	source As IReadableBitmapData,
	context As IAsyncContext,
	newSize As Size,
	Optional scalingMode As ScalingMode = ScalingMode.Auto,
	Optional keepAspectRatio As Boolean = false
) As IReadWriteBitmapData

public:
[ExtensionAttribute]
static IReadWriteBitmapData^ Resize(
	IReadableBitmapData^ source, 
	IAsyncContext^ context, 
	Size newSize, 
	ScalingMode scalingMode = ScalingMode::Auto, 
	bool keepAspectRatio = false
)

[<ExtensionAttribute>]
static member Resize : 
        source : IReadableBitmapData * 
        context : IAsyncContext * 
        newSize : Size * 
        ?scalingMode : ScalingMode * 
        ?keepAspectRatio : bool 
(* Defaults:
        let _scalingMode = defaultArg scalingMode ScalingMode.Auto
        let _keepAspectRatio = defaultArg keepAspectRatio false
*)
-> IReadWriteBitmapData 

Parameters

source  IReadableBitmapData

The source IReadableBitmapData to resize.

context  IAsyncContext

An IAsyncContext instance that contains information for asynchronous processing about the current operation.

newSize  Size

The requested new size.

scalingMode  ScalingMode  (Optional)

A ScalingMode value, which determines the quality of the result as well as the processing time. This parameter is optional.
Default value: Auto.

keepAspectRatio  Boolean  (Optional)

to keep aspect ratio of the specified source; otherwise, . This parameter is optional.
Default value: .

Return Value

Usage Note

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. To reconfigure the degree of parallelism of an existing context, you can use the AsyncContextWrapper class.

Alternatively, you can use this method to specify the degree of parallelism for synchronous execution. For example, by passing AsyncHelper.SingleThreadContext to the context parameter the method will be forced to use a single thread only.

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

Reference