# 512x512_rgb_gradient_ctrl.py

# 512x512_rgb_gradient_ctrl.py

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

ww = 512
hh = 512

root = tk.Tk()
root.title("512x512_image_generator")
root.geometry("%dx%d+%d+%d" %(ww, hh, 10, 10))

canvas = tk.Canvas(root, width=ww, height=hh)
canvas.pack()

def generate(event=None):
    for size in layers:
        interpolate(size)
    draw()

def interpolate(size):
    img = Image.new("RGBA", (size, size))
    pixels = img.load()
    for y in range(size):
        for x in range(size):
            red = random.randint(0, 255)
            green = random.randint(0, 255)
            blue = random.randint(0, 255)
            pixels[x, y] = (red, green, blue, 255)
    img = img.resize((ww, hh))
    layers[size] = img

def draw(event=None):
    buffer = Image.new("RGBA", (ww, hh), (255, 255, 255, 255))
    for size, layer_image in layers.items():
        if size != 4:
            alpha = float(opacity_slider[size].get()) / 2056.0
        else:
            alpha = 1
        buffer = Image.blend(buffer, layer_image, alpha)

    photo = ImageTk.PhotoImage(buffer)
    canvas.create_image(0, 0, anchor=tk.NW, image=photo)
    canvas.image = photo

opacity_label = tk.Toplevel(root)
opacity_title = tk.Label(opacity_label, text="Press Spacebar To Randomize")
opacity_title.pack()
opacity_slider = {}
layers = {}

size = 4
interpolate(size)
while size - 1 < 512 / 4:
    size *= 2
    opacity_slider[size] = tk.Scale(opacity_label, from_=512, to=0, orient=tk.VERTICAL, label=size, command=draw)
    opacity_slider[size].pack(side=tk.LEFT, fill='both', expand=True)
    opacity_slider[size].set(5)
    interpolate(size)

canvas.update()
t = opacity_label.winfo_width()
opacity_label.geometry("%dx300+%d+%d" %(t, 50, 50))
for t in (root, opacity_label):
    t.bind("<space>", generate)
opacity_label.wm_transient(root)

draw()
root.mainloop()