# tk_400x400_putpixel_max_speed_test.py

# tk_400x400_putpixel_max_speed_test.py

import tkinter as tk
from PIL import Image, ImageTk
import math

ww = 400
hh = 400

root = tk.Tk()
root.title("tk_400x400_putpixel_max_speed_test")
root.geometry("%dx%d+0+0"%(ww,hh))
canvas = tk.Canvas(root, bg='white', width=ww, height=hh)
canvas.pack()

cx, cy = ww//2, hh//2

img = Image.new('RGB', (ww, hh), (128, 128, 128))

rgb = []
def create_rgb():
    t = list(range(0, 256, 15))
    rrr = t[:]
    ggg = t[:]
    bbb = t[:]
    r = g = b = 0
    while 1:
        for r in rrr:
            for g in ggg:
                for b in bbb:
                    if (r,g,b) not in rgb:
                        rgb.append((r,g,b))
                    else:
                        return
                if bbb.index(b) == len(bbb) - 1:
                    bbb = bbb[::-1]
            if ggg.index(g) == len(ggg) - 1:
                ggg = ggg[::-1]
        rrr = rrr[::-1]
create_rgb()

while True:
    pixels = rgb[:]
    for pixel in pixels:
        for x in range(0, ww):
            for y in range(0, hh):
                img.putpixel((x, y), pixel)
        tkimg = ImageTk.PhotoImage(img)
        canvas.create_image((cx, cy), image=tkimg)
        canvas.update()