kioubit-dn42-v6-canvas-send/draw-gen3.py

#gen3

import argparse
parser = argparse.ArgumentParser()
parser.add_argument('--skip', type=int, default=0, help="skip x lines (unused)")
parser.add_argument('--drawfirst', action='store_true', help="draw image first (unused)")
parser.add_argument('--slp', type=float, default=0.0001, help="sleep x seconds after each ping")
parser.add_argument('--slp1', type=float, default=0.5, help="sleep x seconds after each frame")
parser.add_argument('-i', '--image', type=str, default='1.png', help="input image")
args = parser.parse_args()
skip, slp, slp1, draw_img = args.skip, args.slp, args.slp1, args.drawfirst

import struct
class ICMP6:
    _ICMP_ECHO_REQUEST       = 128
    def __init__(self, destination, id, sequence, payload=None,
            payload_size=56, ttl=64, traffic_class=0):

        if payload is not None:
            payload_size = len(payload)
        else:
            payload = b'\x00'*payload_size

        self._destination = destination
        self._id = id & 0xffff
        self._sequence = sequence & 0xffff
        self._payload = payload
        self._payload_size = payload_size
        self._ttl = ttl
        self._traffic_class = traffic_class
        self._time = 0
    def _checksum(self, data):
        '''
        Compute the checksum of an ICMP packet. Checksums are used to
        verify the integrity of packets.
        '''
        sum = 0
        data += b'\x00'

        for i in range(0, len(data) - 1, 2):
            sum += (data[i] << 8) + data[i + 1]
            sum  = (sum & 0xffff) + (sum >> 16)

        sum = ~sum & 0xffff

        return sum
    def _create_packet(self):
        '''
        Build an ICMP packet from an identifier, a sequence number and
        a payload.
        This method returns the newly created ICMP header concatenated
        to the payload passed in parameters.
        '''
        id, sequence, payload = self._id, self._sequence, self._payload
        checksum = 0

        # Temporary ICMP header to compute the checksum
        header = struct.pack('!2B3H', self._ICMP_ECHO_REQUEST, 0, checksum,
            id, sequence)

        checksum = self._checksum(header + payload)

        # Definitive ICMP header
        header = struct.pack('!2B3H', self._ICMP_ECHO_REQUEST, 0, checksum,
            id, sequence)

        return header + payload


X=512
Y=512
import socket, traceback, time

from PIL import Image

icmp6pkt = ICMP6(None, 0xad, 0, b'')._create_packet()
import concurrent.futures
def send_icmp_mt(addrs, workers=10):
    def sendto(addr):
        with socket.socket(socket.AF_INET6, socket.SOCK_DGRAM, socket.IPPROTO_ICMPV6) as s:
            s.sendto(icmp6pkt, (addr, 0))
        time.sleep(slp)
    with concurrent.futures.ThreadPoolExecutor(max_workers=workers) as executor:
        for addr in addrs:
            executor.submit(sendto, addr)
        executor.shutdown(wait=True, cancel_futures=False)
def send_icmp_st(addrs):
    try:
        for addr in addrs:
            with socket.socket(socket.AF_INET6, socket.SOCK_DGRAM, socket.IPPROTO_ICMPV6) as s:
                s.sendto(icmp6pkt, (addr, 0))
            time.sleep(slp)
    except Exception:
       traceback.print_exc()
send_icmp = send_icmp_st

headers = {'User-Agent': 'curl/7.88.1)'}
mkreq = lambda u: urllib.request.Request(u, data=None, headers=headers)
timeout = 60

import urllib.request
import contextlib
import base64
import io
import threading
img = None
imglock = threading.Lock()
def get_bg():
    global img
    while True:
        try:
            with contextlib.closing(urllib.request.urlopen(mkreq('http://us2.g-load.eu:9090/stream'), timeout=timeout)) as resp:
                for line in resp:
                    if line.startswith(b'data:'):
                        with imglock:
                            imgn = Image.open(io.BytesIO(base64.b64decode(line[5:-1])))
                            assert imgn.size == (X, Y)
                            #print(imgn.mode)
                            if img is None:
                                img = imgn.convert(mode='RGBA')
                            else:
                                assert imgn.mode == 'RGBA'
                                img.paste(imgn, (0, 0), imgn)
        except Exception:
            traceback.print_exc()
        print('get_bg exit')
        time.sleep(3)

def start_bg_task():
    threading.Thread(target=get_bg, daemon=True).start()
    while img is None:
        time.sleep(1)
    print('connection established')

import random

draw_seq = [(x, y) for x in range(X) for y in range(Y)]
random.shuffle(draw_seq)
start_bg_task()
ldraw = Image.new(mode="RGBA", size=(X, Y))
def draw(img):
    global ldraw
    send_icmp_q = []
    start = time.time()
    print('draw 1 frame in ', end='')
    for x, y in draw_seq:
        newpix = img.getpixel((x, y))
        r, g, b, a = newpix
        if a and newpix != ldraw.getpixel((x, y)):
            send_icmp_q.append(f"fdcf:8538:9ad5:3333:{x:x}:{y:x}:11{r:02x}:{g:02x}{b:02x}")
    startsend = time.time()
    send_icmp(send_icmp_q)
    ldraw = img.copy()
    end = time.time()
    print(f"{1000*(end-start):.1f}ms {1000*(end-startsend):.1f}ms")

ldraw = img.copy()
draw(Image.open(args.image).convert('RGBA').resize((X, Y), Image.Resampling.LANCZOS))
print('success')