# tk_text_zoom.py

# tk_text_zoom.py

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

WW, HH = 640, 640
CX, CY = WW // 2, HH // 2

root = tk.Tk()
root.title("# tk_text_zoom.py")
root.geometry("+0+0")
canvas = tk.Canvas(root, width=WW, height=HH)
canvas.pack()

def get_font(font_size):
    return ImageFont.truetype("times.ttf", font_size)

def create_txt():
    font_size = 400
    font = get_font(font_size)
    while True:
        bbox = font.getbbox("a")
        text_width = bbox[2] - bbox[0]
        text_height = bbox[3] - bbox[1]
        if text_width > WW - 8 or text_height > HH - 8:
            break
        font_size += 1
        font = get_font(font_size)

    def blank_check():
        for x in range(WW):
            if pixels[x, HH - 1][0]:
                return False
        return True

    for y_offset in range(HH):
        img = Image.new("RGBA", (WW, HH), (0, 0, 0, 0))
        draw = ImageDraw.Draw(img)
        draw.text((CX, CY - y_offset), "a", fill="red", font=font, anchor="mm")
        pixels = img.load()
        if blank_check():
            break
    return img

img_txt_default = create_txt()
img_txt = img_txt_default.copy()

current_scale = 1
while True:
    t = int(current_scale)
    scaled_img = img_txt.resize((t, t), Image.ANTIALIAS)

    current_scale *= 1.05
    if t > WW:
        left = (t - WW) // 2
        top = (t - HH) // 2
        right = left + WW
        bottom = top + HH
        img_txt = scaled_img.crop((left, top, right, bottom))
        if current_scale > 1000:
            img_txt = img_txt_default.copy()
            current_scale = 1

    scaled_tk_img = ImageTk.PhotoImage(scaled_img)

    canvas.delete("all")
    canvas.create_image(CX, CY, image=scaled_tk_img, anchor="center")

    canvas.update()