DioDocs for PDF
ConvertToPremultipliedAlpha メソッド

DS.Documents.Imaging アセンブリ > GrapeCity.Documents.Imaging 名前空間 > GcBitmap クラス : ConvertToPremultipliedAlpha メソッド
Premultiplies the color channels by the alpha channel and sets the Premultiplied property to True.
オーバーロード一覧
オーバーロード解説
Premultiplies the color channels by the alpha channel and sets the Premultiplied property to True.  
Premultiplies the color channels of the specified rectangle by the alpha channel.

The Premultiplied property is not affected by this overload.

 
参照

GcBitmap クラス
GcBitmap メンバ