# tk_masked_demo.py

# tk_masked_demo.py

import tkinter as tk
from PIL import Image, ImageDraw, ImageTk, ImageFilter, ImageOps
import random

# Create a 500x500 canvas
canvas_width = 500
canvas_height = 500

root = tk.Tk()
canvas = tk.Canvas(root, width=canvas_width, height=canvas_height)
canvas.pack()

# Generate the colorful checkerboard image
checkerboard = Image.new('RGB', (canvas_width, canvas_height), (255, 255, 255))
draw = ImageDraw.Draw(checkerboard)
square_size = 50
colors = []
t = [z for z in range(0, 256, 35)]
for r in t:
    for g in t:
        for b in t:
            colors += [(r, g, b, 255)]
random.shuffle(colors)

for i in range(0, canvas_width, square_size):
    for j in range(0, canvas_height, square_size):
        color = colors.pop()
        draw.rectangle([i, j, i + square_size, j + square_size], fill=color)
checkerboard = checkerboard.filter(ImageFilter.GaussianBlur(radius=20))

polka_dot = Image.new('RGBA', (canvas_width, canvas_height), (255, 255, 255, 0))
draw = ImageDraw.Draw(polka_dot)
dot_size = 20
for i in range(0, canvas_width, dot_size+10):
    for j in range(0, canvas_height, dot_size+10):
        color = colors.pop()
        draw.ellipse([i, j, i + dot_size, j + dot_size], fill=color)

# Generate the mask
ww = 400
hh = 400
p = 10
mask = Image.new('L', (ww+p, hh+p), 0)
draw = ImageDraw.Draw(mask)
for i in range(0, min(ww+p, hh+p) // 2):
    draw.rectangle([i, i, ww+p - i, hh+p - i], fill=i * 255 // (min(ww+p, hh+p) // 5))
mask_size = (ww+p, hh+p)

polka_dot = polka_dot.resize(mask_size)
masked_polka_dot = Image.composite(polka_dot, Image.new('RGBA', mask_size, (255, 255, 255, 0)), mask)

checkerboard_tk = ImageTk.PhotoImage(checkerboard)
canvas.create_image(0, 0, anchor=tk.NW, image=checkerboard_tk)

masked_polka_dot_tk = ImageTk.PhotoImage(masked_polka_dot)
canvas.create_image((canvas_width // 2, canvas_height // 2), anchor=tk.CENTER, image=masked_polka_dot_tk)

root.mainloop()