def init(autoupdate=True):
import lvgl as lv
import SDL
HOR_RES = 480
VER_RES = 800
"""
GUI initialization function.
Should be called once in the very beginning.
"""
# init the gui library
lv.init()
# init the hardware library
SDL.init()
# Register SDL display driver
disp_buf1 = lv.disp_buf_t()
buf1_1 = bytearray(HOR_RES * 10)
lv.disp_buf_init(disp_buf1, buf1_1, None, len(buf1_1) // 4)
disp_drv = lv.disp_drv_t()
lv.disp_drv_init(disp_drv)
disp_drv.buffer = disp_buf1
disp_drv.flush_cb = SDL.monitor_flush
disp_drv.hor_res = HOR_RES
disp_drv.ver_res = VER_RES
lv.disp_drv_register(disp_drv)
# Regsiter SDL mouse driver
indev_drv = lv.indev_drv_t()
lv.indev_drv_init(indev_drv)
indev_drv.type = lv.INDEV_TYPE.POINTER
indev_drv.read_cb = SDL.mouse_read
lv.indev_drv_register(indev_drv)
scr = lv.obj()
lv.scr_load(scr)
if autoupdate:
import SDL
SDL.enable_autoupdate()
