Grabber::setOverlayBitmapPathPosition Method

Sets the positions of OverlayBitmap objects in the graph.

Syntax:

bool setOverlayBitmapPathPosition( DWORD OVBPathPositions );

Parameter		Description


OVBPathPositions		Specifies the position of the OverlayBitmap objects in the graph. This can be a member of the tPathPosition enumeration or an ORed combination of them.

Return value:

true, if the operation was successful. If an error occurred, call getLastError to obtain extended error information.

Remarks:

You should set the positions before calling startLive. When the image stream is running you cannot change the position.

The default setting is ePP_DEVICE. If you do not need an overlay in your application, it is always a good idea to disable all overlays by calling this method with ePP_NONE.

In contrast to OverlayBitmap::setEnable, setOverlayBitmapPathPosition can not be used after live mode has been started.

Information:

Introduced in version 3.0

Example:

To enable the overlay bitmap for both sink and display, but not for the device, use ePP_SINK|ePP_DISPLAY as a parameter.

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