D3DImage.CopyBackBuffer Method

Creates a software copy of the D3DImage.

Namespace:  System.Windows.Interop
Assembly:  PresentationCore (in PresentationCore.dll)

protected internal virtual BitmapSource CopyBackBuffer()

Return Value

Type: System.Windows.Media.Imaging.BitmapSource
A BitmapSource that is a software copy of the current state of the back buffer; otherwise, null if the back buffer cannot be read.

The CopyBackBuffer method is called by clients such as the printing system and the RenderTargetBitmap class.

Optionally override the CopyBackBuffer method to implement custom logic and return a different BitmapSource. For example, you can return a placeholder BitmapSource if the default CopyBackBuffer implementation returns null.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5 SP1, 3.0 SP2

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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