DioDocs for PDF
CreateImage メソッド (GcBitmap)

GrapeCity.Documents.Imaging アセンブリ > GrapeCity.Documents.Imaging 名前空間 > GcBitmap クラス : CreateImage メソッド
Creates the image of the given size and resolution.

The content is not initialized and can contain any random data.

If subsequent rendering is going to cover the whole surface of the bitmap, or if CreateGraphics will be called on the bitmap with a non-null background color, clearing it (which is a lengthy operation for large bitmaps) is not needed. If some areas of the bitmap are going to be left untouched, they must be cleared to avoid the possibility of random artifacts showing.

オーバーロード一覧
オーバーロード解説
Creates the image of the given size and resolution.

The content is not initialized and can contain any random data.

If subsequent rendering is going to cover the whole surface of the bitmap, or if CreateGraphics will be called on the bitmap with a non-null background color, clearing it (which is a lengthy operation for large bitmaps) is not needed. If some areas of the bitmap are going to be left untouched, they must be cleared to avoid the possibility of random artifacts showing.

 
Creates the image based on the existing pixel data to be read/modified in-place.  
Creates the image based on the existing pixel data to be read/modified in-place.  
参照

GcBitmap クラス
GcBitmap メンバ