BitmapDataExtensionsMakeOpaque Method

Makes this bitmapData opaque using the specified backColor.

Definition

Namespace: KGySoft.Drawing.Imaging
Assembly: KGySoft.Drawing.Core (in KGySoft.Drawing.Core.dll) Version: 7.0.0
C#
public static void MakeOpaque(
	this IReadWriteBitmapData bitmapData,
	Color32 backColor,
	IDitherer? ditherer = null
)

Parameters

bitmapData  IReadWriteBitmapData
The IReadWriteBitmapData to make opaque.
backColor  Color32
Pixels with alpha in bitmapData will be blended with this color. The Color32.A property of the specified color is ignored.
ditherer  IDitherer  (Optional)
An optional IDitherer instance to dither the result of the transformation if the inverse of the bitmapData has no exact representation with its PixelFormat. This parameter is optional.
Default value: .

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IReadWriteBitmapData. 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).

Remarks

  Note

This method adjusts the degree of parallelization automatically, blocks the caller, and does not support cancellation or reporting progress. Use the BeginMakeOpaque or MakeOpaqueAsync (in .NET Framework 4.0 and above) methods for asynchronous call and to adjust parallelization, set up cancellation and for reporting progress.

This method calls the TransformColors method internally. See the Remarks section of the TransformColors method for more details.

If bitmapData has an indexed PixelFormat and ditherer is , then its palette entries are tried to be transformed instead of the actual pixels in the first place (if it is supported by bitmapData). To transform the colors of an indexed IBitmapData without changing the palette specify a non- ditherer. Transforming the palette is both faster and provides a better result.

The ditherer is ignored for KnownPixelFormats with more than 16 bits-per-pixel and for the Format16bppGrayScale format.

See Also