RetroQUEST/scripts/emulate.gd.old

extends Node

# Reference to the LibRetroHost singleton
@onready var libretro_core = Engine.get_singleton("RetroHost")

func start_game(core_path: String, rom_path: String) -> bool:
	"""
	Initializes the LibRetro core and loads the specified ROM.
	Returns true if the game is loaded successfully, otherwise false.
	"""
	if not libretro_core.load_core(core_path):
		push_error("Error: Unable to load LibRetro core: " + core_path)
		return false

	print("Core loaded successfully:", core_path)

	if not FileAccess.file_exists(rom_path):
		push_error("Error: ROM not found: " + rom_path)
		return false

	var rom_data = load_rom_data(rom_path)
	if rom_data.is_empty():
		push_error("Error: Unable to load ROM data: " + rom_path)
		return false

	if not libretro_core.load_game_from_memory(rom_data):
		push_error("Error: Unable to load game ROM: " + rom_path)
		return false

	print("Game loaded successfully:", rom_path)
	return true

func load_rom_data(rom_path: String) -> PackedByteArray:
	"""
	Loads the ROM data from a file.
	"""
	var file = FileAccess.open(rom_path, FileAccess.READ)
	if not file:
		push_error("Error: Unable to open ROM file: " + rom_path)
		return PackedByteArray()

	var rom_data = file.get_buffer(file.get_length())
	file.close()
	return rom_data

func run():
	"""
	Starts the emulation loop.
	"""
	if not libretro_core:
		push_error("Error: LibRetroHost is not initialized.")
		return

	libretro_core.run()