BitmapDataExtensionsMakeOpaque(IReadWriteBitmapData, Color32, IDitherer) Method
Makes this bitmapData opaque using the specified backColor.
Namespace: KGySoft.Drawing.ImagingAssembly: KGySoft.Drawing.Core (in KGySoft.Drawing.Core.dll) Version: 10.0.0-rc.1
public static void MakeOpaque(
this IReadWriteBitmapData bitmapData,
Color32 backColor,
IDitherer? ditherer = null
)
<ExtensionAttribute>
Public Shared Sub MakeOpaque (
bitmapData As IReadWriteBitmapData,
backColor As Color32,
Optional ditherer As IDitherer = Nothing
)
public:
[ExtensionAttribute]
static void MakeOpaque(
IReadWriteBitmapData^ bitmapData,
Color32 backColor,
IDitherer^ ditherer = nullptr
)
[<ExtensionAttribute>]
static member MakeOpaque :
bitmapData : IReadWriteBitmapData *
backColor : Color32 *
?ditherer : IDitherer
(* Defaults:
let _ditherer = defaultArg ditherer null
*)
-> unit
- bitmapData IReadWriteBitmapData
- The IReadWriteBitmapData to make opaque.
- backColor Color32
- Pixels with alpha in bitmapData will be blended with this color.
The Color32.A field 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: .
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).
This method adjusts the degree of parallelization automatically, blocks the caller, and does not support cancellation or reporting progress. You can use
the
MakeOpaque(IReadWriteBitmapData, Color32, IDitherer, ParallelConfig) overload to configure these, while still executing the method synchronously.
Alternatively, 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.
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.
If ditherer is , this method attempts to preserve the original color depth, including wide pixel formats.
The ditherer may have no effect for KnownPixelFormats with more than 16 bits-per-pixel and for grayscale formats.
