import tempfile
import subprocess
import PIL.Image

def convert(infile):
    pto = tempfile.NamedTemporaryFile()
    image = tempfile.NamedTemporaryFile(suffix="." + infile.split(".")[-1].split("/")[-1])
    with open(infile, "rb") as inimage:
        image.write(inimage.read())
    erect = ["erect2cubic", f"--erect={image.name}", f"--ptofile={pto.name}", "--filespec=PNG_m"]
    subprocess.run(erect)
    tiles = tempfile.TemporaryDirectory()
    nona = ["nona", pto.name, "-o", tiles.name + "/out"]
    subprocess.run(nona)
    return PIL.Image.open(tiles.name + "/out0005.png")