create_test_data.py

from PIL import Image, ImageDraw, ImageFont, ImageOps
import numpy as np
import random
try:
    unichr
except NameError:
    unichr = chr

def render(input_arr):
    output = input_arr
    out_im = Image.new("RGBA", (128,128), color = (0xFF,0xFF,0xFF,0xFF))
    d = ImageDraw.Draw(out_im)
    fnt = ImageFont.truetype('unifont-10.0.06.ttf', 8, encoding="utf-32")
    for charac, i in zip(output, range(len(output))):
        x = 8 * int(i %16)
        y = 8 * int(i/16)
        try:
            d.text((x,y),unichr(max(0,min(0x110000,int(charac)))),font=fnt,fill=(0x00,0x00,0x00,0xff))
        except:
            d.text((x,y)," ",font=fnt,fill=(0x00,0x00,0x00,0xff))
    return out_im
    
    
def main():
    iterations = 100
    num_of_chars = 16 * 16
    for i in range(iterations):
        text_file = open(r"./test_data/%d.txt"%i, "wb")
        output_text = []
        for a in range(num_of_chars):
            test_char = random.randint(0x00, 0x110000)
            text_file.write(test_char.to_bytes(4, "big"))
            output_text.append(test_char)
        out_im = render(output_text)
        out_im.convert("L").resize((32,32)).save(r"./test_data/%d.png"%i)

        #text_file.write(output_text)
        text_file.close()

if __name__ == "__main__":
    main()