BitmapDataExtensionsAdjustContrastAsync Method

public static Task<bool> AdjustContrastAsync(
	this IReadWriteBitmapData bitmapData,
	float contrast,
	IDitherer? ditherer = null,
	ColorChannels channels = ColorChannels.Rgb,
	TaskConfig? asyncConfig = null
)

<ExtensionAttribute>
Public Shared Function AdjustContrastAsync ( 
	bitmapData As IReadWriteBitmapData,
	contrast As Single,
	Optional ditherer As IDitherer = Nothing,
	Optional channels As ColorChannels = ColorChannels.Rgb,
	Optional asyncConfig As TaskConfig = Nothing
) As Task(Of Boolean)

public:
[ExtensionAttribute]
static Task<bool>^ AdjustContrastAsync(
	IReadWriteBitmapData^ bitmapData, 
	float contrast, 
	IDitherer^ ditherer = nullptr, 
	ColorChannels channels = ColorChannels::Rgb, 
	TaskConfig^ asyncConfig = nullptr
)

[<ExtensionAttribute>]
static member AdjustContrastAsync : 
        bitmapData : IReadWriteBitmapData * 
        contrast : float32 * 
        ?ditherer : IDitherer * 
        ?channels : ColorChannels * 
        ?asyncConfig : TaskConfig 
(* Defaults:
        let _ditherer = defaultArg ditherer null
        let _channels = defaultArg channels ColorChannels.Rgb
        let _asyncConfig = defaultArg asyncConfig null
*)
-> Task<bool> 

Parameters

bitmapData  IReadWriteBitmapData

The IReadWriteBitmapData to be transformed.

contrast  Single

A float value between -1 and 1, inclusive bounds. Positive values increase the contrast, while negative values decrease it.

ditherer  IDitherer  (Optional)

An optional IDitherer instance to dither the result of the transformation if the transformed colors are not compatible with the PixelFormat of the specified bitmapData. This parameter is optional.
Default value: .

channels  ColorChannels  (Optional)

The ColorChannels, on which the adjustment has to be performed. This parameter is optional.
Default value: Rgb.

asyncConfig  TaskConfig  (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

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

Reference