Instance Method

present(at:)

Presents the drawable on the screen at a specific host time.

Required.

Declaration

func present(at presentationTime: CFTimeInterval)

Parameters

presentationTime

The Mach absolute time at which the drawable should be presented, in seconds.

Discussion

Graphics and compute commands can schedule render or write requests to a given drawable. A drawable tracks whether it has outstanding render or write requests on it and will not present until those requests have been completed.

In this case, the drawable attempts to present at a specific host time, but may miss this opportunity if the command buffer has not completed all render or write requests for that drawable. If the given presentation time is missed, then the drawable will present at the next possible opportunity.

See Also

Presenting the Drawable

func present()

Presents the drawable on the screen as soon as possible.

Required.

func present(afterMinimumDuration: CFTimeInterval)

Presents the drawable on the screen after waiting for the previous drawable to meet the minimum display time.

Required.

func addPresentedHandler(MTLDrawablePresentedHandler)

Registers a block of code that is called immediately after the drawable has been presented on the screen.

Required.

typealias MTLDrawablePresentedHandler

A block of code invoked when a drawable has been presented.