# tk_cache_zoom_demo.py

# tk_cache_zoom_demo.py

import tkinter as tk
from PIL import Image, ImageTk, ImageDraw, ImageFont
import math
WW, HH = 640, 640
cx, cy = WW // 2, HH // 2
root = tk.Tk()
root.geometry('+0+0')
canvas = tk.Canvas(root, width=WW, height=HH)
canvas.pack()
grid_colors = {
    (0, 0): (255, 255, 255), (0, 1): (255, 255, 0), (0, 2): (0, 255, 0),
    (1, 0): (255, 165, 0),   (1, 1): (128, 128, 128), (1, 2): (0, 0, 255),
    (2, 0): (255, 0, 0),     (2, 1): (128, 0, 128),   (2, 2): (0, 0, 0)
}
small_img = Image.new('RGB', (3, 3))
for y in range(3):
    for x in range(3):
        small_img.putpixel((x, y), grid_colors[(x, y)])
base_img = small_img.resize((WW, HH))
colors = list(base_img.getdata())
active_pixels = set()
def get_degrees(x, y):
    dx = x - cx
    dy = y - cy
    degrees = math.degrees(math.atan2(-dy, dx))
    if degrees < 0:
        degrees += 360
    return degrees
def get_distance_from_center(x, y):
    dx = x - cx
    dy = y - cy
    distance = math.sqrt(dx * dx + dy * dy)
    return distance

zoom_cache = {}
for y in range(HH):
    for x in range(WW):
        degrees = get_degrees(x, y)
        angle = math.radians(degrees)
        distance = get_distance_from_center(x, y) + 10
        nx = cx + distance * math.cos(angle)
        ny = cy - distance * math.sin(angle)
        if 0 <= nx < WW and 0 <= ny < HH:
            zoom_cache[(x, y)] = {1: (int(round(nx)), int(round(ny)))}
            active_pixels.add((x, y))
while 1:
    photo = ImageTk.PhotoImage(base_img)
    canvas.create_image(0, 0, anchor=tk.NW, image=photo)
    root.update()

    new_img = Image.new('RGB', (WW, HH), (0, 0, 0))
    updated_pixels = set()
    for (x, y) in active_pixels:
        try:
            src_x, src_y = zoom_cache[(x, y)][1]
            color = base_img.getpixel((x, y))
            new_img.putpixel((src_x, src_y), color)
            updated_pixels.add((src_x, src_y))
        except:
            0
    base_img = new_img
    active_pixels = updated_pixels