CVFillExtendedPixelsCallBackData
A structure for holding information that describes a custom extended pixel fill algorithm.
Declaration
struct CVFillExtendedPixelsCallBackDataOverview
You must fill out this structure and store it as part of your pixel format description Core Foundation dictionary (key: kCVPixelFormatFillExtendedPixelsCallback, type: CFData). However, if your custom pixel format never needs the functionality of CVPixelBufferFillExtendedPixels(_:), you don’t need to add this key or implement the associated callback.
For more information about defining a custom pixel format, see Pixel Format Description Keys.