編輯

共用方式為


SKBitmap.ExtractAlpha Method

Definition

Overloads

ExtractAlpha(SKBitmap, SKPointI)

Retrieve the alpha layer of this bitmap.

ExtractAlpha(SKBitmap, SKPaint, SKPointI)

Retrieve the alpha layer of this bitmap after applying the specified paint.

ExtractAlpha(SKBitmap)

Retrieve the alpha layer of this bitmap.

ExtractAlpha(SKBitmap, SKPaint)

Retrieve the alpha layer of this bitmap after applying the specified paint.

ExtractAlpha(SKBitmap, SKPointI)

Retrieve the alpha layer of this bitmap.

public bool ExtractAlpha (SkiaSharp.SKBitmap destination, out SkiaSharp.SKPointI offset);

Parameters

destination
SKBitmap

The bitmap to be filled with alpha layer.

offset
SKPointI

The top-left coordinate to position the retrieved bitmap so that it visually lines up with the original.

Returns

Returns true if the alpha layer was retrieved, false otherwise.

Applies to

ExtractAlpha(SKBitmap, SKPaint, SKPointI)

Retrieve the alpha layer of this bitmap after applying the specified paint.

public bool ExtractAlpha (SkiaSharp.SKBitmap destination, SkiaSharp.SKPaint paint, out SkiaSharp.SKPointI offset);

Parameters

destination
SKBitmap

The bitmap to be filled with alpha layer.

paint
SKPaint

The paint to draw with.

offset
SKPointI

The top-left coordinate to position the retrieved bitmap so that it visually lines up with the original.

Returns

Returns true if the alpha layer was retrieved, false otherwise.

Applies to

ExtractAlpha(SKBitmap)

Retrieve the alpha layer of this bitmap.

public bool ExtractAlpha (SkiaSharp.SKBitmap destination);

Parameters

destination
SKBitmap

The bitmap to be filled with alpha layer.

Returns

Returns true if the alpha layer was retrieved, false otherwise.

Applies to

ExtractAlpha(SKBitmap, SKPaint)

Retrieve the alpha layer of this bitmap after applying the specified paint.

public bool ExtractAlpha (SkiaSharp.SKBitmap destination, SkiaSharp.SKPaint paint);

Parameters

destination
SKBitmap

The bitmap to be filled with alpha layer.

paint
SKPaint

The paint to draw with.

Returns

Returns true if the alpha layer was retrieved, false otherwise.

Applies to