extends Control

export var scale = 2 setget set_scale
export var upThreshold = 1.0/Engine.iterations_per_second
export var downThreshold = 1.0/30.0

export var delay = 1.0

func _ready():
	set_scale(scale)
	$"/root/Music/BGM".play()

func _process(delta):
	# Give the system time to adjust
	if delay > 0:
		delay -= delta
		return
	if delta > downThreshold:
		print("GPU is taking too much (", delta, "s < ", downThreshold, "s), adjusting shader scale")
		set_scale(scale+1)
	elif delta < upThreshold and scale > 1:
		print("GPU is taking it easy (", delta, "s < ", upThreshold, "s), adjusting shader scale")
		set_scale(scale-1)

func set_scale(val):
	scale = val
	$Viewport.size = rect_size / scale
	$Background.update()

func _on_resized():
	$Viewport.size = rect_size / scale
	$Background.update()