#!/usr/bin/env python3
import sys
from base64 import standard_b64encode
from io import BytesIO

from PIL import Image, ImageDraw

def draw_to_terminal(img: Image.Image) -> None:
    buffer: BytesIO = BytesIO()
    img.save(buffer, format='PNG')
    write_chunked(a='T', f=100, data=buffer.getvalue())

def serialize_gr_command(**cmd):
    payload = cmd.pop('payload', None)
    cmd = ','.join(f'{k}={v}' for k, v in cmd.items())
    ans = []
    w = ans.append
    w(b'\033_G'), w(cmd.encode('ascii'))
    if payload:
        w(b';')
        w(payload)
    w(b'\033\\')
    return b''.join(ans)

def write_chunked(**cmd):
    data = standard_b64encode(cmd.pop('data'))
    while data:
        chunk, data = data[:4096], data[4096:]
        m = 1 if data else 0
        sys.stdout.buffer.write(serialize_gr_command(payload=chunk, m=m,
                                                    **cmd))
        sys.stdout.flush()
        cmd.clear()

if __name__ == '__main__':
    i = Image.new("RGB", (100, 100), (0, 0, 0))
    d = ImageDraw.Draw(i)
    d.ellipse([(5, 5), (95, 95)])
    d.ellipse([(10, 10), (90, 90)])
    d.line(((50, 0), (50, 100)))
    d.line(((0, 50), (100, 50)))

    draw_to_terminal(i)