kioubit-dn42-v6-canvas-send/gen2.py

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, ImageOps
img = Image.open('1.png')
img = img.resize((X, Y), Image.Resampling.LANCZOS)
img.save('out.png')
img = img.convert('RGBA')

imgdvd = Image.open('dvd.png')
imgdvd = imgdvd.convert('RGBA')

def send_icmp(addr):
    try:
        with socket.socket(socket.AF_INET6, socket.SOCK_DGRAM, socket.IPPROTO_ICMPV6) as s:
            p = ICMP6(None, 0xad, 0, b'')._create_packet()
            s.sendto(p, (addr, 0))
    except Exception:
       traceback.print_exc()

import sys, random
skip = int(sys.argv[1]) if sys.argv[1:] else 0
slp = float(sys.argv[2]) if sys.argv[2:] else 0.0001
slp1 = float(sys.argv[3]) if sys.argv[3:] else 0.5
draw_img = int(sys.argv[4]) if sys.argv[4:] else 0

Dx, Dy = imgdvd.size
sx = random.randint(0, X-1-Dx)
sy = random.randint(0, Y-1-Dy)
fx = random.choice((1, -1))
fy = random.choice((1, -1))

def draw(img):
    for x in range(X):
        if x < skip:
            continue
        print(f"{x=}")
        for y in range(Y):
            r, g, b, a = img.getpixel((x, y))
            if a:
                send_icmp(f"fdcf:8538:9ad5:3333:{x:x}:{y:x}:11{r:02x}:{g:02x}{b:02x}")
                #print(f"fdcf:8538:9ad5:3333:{x:x}:{y:x}:11{r:02x}:{g:02x}{b:02x}")
                time.sleep(slp)

D_RGB = [0, 0, 0]
imgdvdc = None
def update_drgb():
    global imgdvdc
    D_RGB.clear()
    D_RGB.extend([random.randint(50, 250), random.randint(50, 250), random.randint(50, 250)])
    imgdvdc = imgdvd.copy()
    for x in range(Dx):
        for y in range(Dy):
            _, _, _, a = imgdvd.getpixel((x, y))
            imgdvdc.putpixel((x, y), (*D_RGB, a))
update_drgb()
old1 = Image.new(mode="RGBA", size=(Dx, Dy))
oldsxy = [0, 0]
def blend():
    global old1
    new = img.crop((sx, sy, sx+Dx, sy+Dy))
    old1_old = old1.copy()
    #old1 = Image.new(mode="RGBA", size=(X, Y))
    old1 = new.copy()
    #old1.paste(old, (sx, sy))
    new.paste(imgdvdc, (0, 0), imgdvdc)
    new1 = Image.new(mode="RGBA", size=(X, Y))
    #new1 = img.copy()
    new1.paste(old1_old, oldsxy.copy(), old1_old)
    new1.paste(new, (sx, sy), new)
    oldsxy[0], oldsxy[1] = sx, sy
    #new1.save('/tmp/2.png')
    #time.sleep(0.5)
    return new1

STEP=5
if draw_img:
    draw(img)
while True:
    imgf = blend()
    draw(imgf)

    if fx > 0:
        if sx + Dx >= X:
            fx = -fx
            update_drgb()
    else:
        if sx <= 0:
            fx = -fx
            update_drgb()
    if fy > 0:
        if sy + Dy >= Y:
            fy = -fy
            update_drgb()
    else:
        if sy <= 0:
            fy = -fy
            update_drgb()
    sx += STEP * fx
    sy += STEP * fy
    time.sleep(slp1)