Function

IOSurfaceCopyValue(_:_:)

Retrieves a value from the dictionary associated with the buffer.

Declaration

func IOSurfaceCopyValue(_ buffer: IOSurfaceRef, _ key: CFString) -> CFTypeRef?

Discussion

This call lets you attach CF property list types to an IOSurface buffer. This call is expensive (it must essentially serialize the data into the kernel) and thus should be avoided whenever possible.