CGDisplayPrimaryDisplay(_:)

Declaration

func CGDisplayPrimaryDisplay(_ display: CGDirectDisplayID) -> CGDirectDisplayID

Parameters

• display:

  The identifier of a display in a hardware mirror set.

Return Value

The primary display in the mirror set. If display is not hardware-mirrored, this function simply returns display.

Discussion

In hardware mirroring, the contents of a single framebuffer are rendered in two or more displays simultaneously. The mirrored displays are said to be in a hardware mirroring set.

At the discretion of the device driver, one of the displays in a hardware mirroring set is designated as the primary display. The device driver binds the drawing engine, hardware accelerator, and 3D engine to the primary display and directs all drawing operations to this display.

See Also

Functions

• CGAcquireDisplayFadeReservation(_:_:)
• CGAssociateMouseAndMouseCursorPosition(_:)
• CGBeginDisplayConfiguration(_:)
• CGCancelDisplayConfiguration(_:)
• CGCaptureAllDisplays()
• CGCaptureAllDisplaysWithOptions(_:)
• CGCompleteDisplayConfiguration(_:_:)
• CGConfigureDisplayFadeEffect(_:_:_:_:_:_:)
• CGConfigureDisplayMirrorOfDisplay(_:_:_:)
• CGConfigureDisplayMode(_:_:_:)
• CGConfigureDisplayOrigin(_:_:_:_:)
• CGConfigureDisplayStereoOperation(_:_:_:_:)
• CGConfigureDisplayWithDisplayMode(_:_:_:_:)
• CGCursorIsDrawnInFramebuffer()
• CGCursorIsVisible()