label_printer/flask/gen_image.py

from PIL import Image, ImageDraw, ImageFont
from colorama import Fore, Style
from printer_info import *

def gen_image(height, text1, text2):
    font1 = ImageFont.truetype("ComicMono.ttf", size=text1["size"])
    font2 = ImageFont.truetype("ComicMono.ttf", size=text2["size"])

    text1_box = font1.getbbox(text1["string"])
    text2_box = font2.getbbox(text2["string"])

    text1_width = text1_box[2]
    text2_width = text2_box[2]

    # I am assuming the left corner of the bbox to always be 0, I have yet to
    # encounter a situation when this isn't the case
    if (text1_box[0] != 0 or text2_box[0] != 0):
        print(Fore.YELLOW + "Warning, found situation where left corner of bbox of text != 0,", "text1_box:",  text1_box, "text2_box", text2_box)
    
    # the 1 here assures we don't get a 0 width image
    img = Image.new('1', (max(text1_width, text2_width, 1), height), color=1)

    draw = ImageDraw.Draw(img)

    draw.text((0, text1["pos"]), text1["string"], font=font1)
    draw.text((0, text2["pos"]), text2["string"], font=font2)

    return img

Text1 = {
    "string": "Hello world",
    "size": 30,
    "pos": 10,
}

Text2 = {
    "string": "Hello worhfeiheifhefld",
    "size": 20,
    "pos": 40,
}

gen_image(label_width, Text1, Text2).save('output.png')