# tk_outline_text.py

# tk_outline_text.py

import tkinter as tk
from PIL import Image, ImageDraw, ImageFont

root = tk.Tk()
root.title("tk outline")

ww, hh = 600, 600
root.geometry(f"{ww}x{hh}+10+10")

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

img = Image.new('RGB', (ww, hh), 'white')
draw = ImageDraw.Draw(img)
font = ImageFont.truetype("Gabriola.ttf", 1400)
draw.text((10, -420), u"\u03C0", font=font, fill="#000000")

outline = []
for x in range(img.width):
    for y in range(img.height):
        if img.getpixel((x, y)) != (255, 255, 255):
            if max(img.getpixel((x0, y0)) for x0, y0 in ((x+1,y), (x-1,y), (x,y+1), (x,y-1))) == (255, 255, 255):
                outline.append((x, y))

for x, y in outline:
    canvas.create_rectangle(x, y, x+7, y+7, fill="#9433FF", width=0)

root.mainloop()