package display

// OSDTemplate is the flight OSD layout of a display target: a transparent,
// input-transparent surface above pilot video, reserved as the future OSD
// rendering surface. It presents nothing yet and never draws the fallback:
// the OSD is a telemetry surface, not a video substitute, and WFB or video
// decode never move into the UI process to feed it. Flight telemetry
// rendering arrives in later Ground Station work; the shared presence keeps
// the OSD on the same video lifecycle as the fallback canvas, so the session
// redraws it on every presence transition.
type OSDTemplate struct {
	video *VideoPresence
}

// NewOSDTemplate builds the OSD surface for a target.
func NewOSDTemplate(video *VideoPresence) OSDTemplate {
	return OSDTemplate{video: video}
}

func (t OSDTemplate) Draw(canvas Canvas) {
	canvas.Clear()
	canvas.Flush()
}