Converts TTF fonts to a PNG file recognized by Love2D game engine.

ttf2love.py

#!/usr/bin/env python

import sys
from PIL import Image, ImageChops, ImageDraw, ImageFont


BACKGROUND_COLOR = (0, 0, 0, 0)
FONT_COLOR = (255, 255, 255, 255)
MARKER_COLOR = (255, 255, 0, 255)


def create_bitmap_font(font, glyphs, margin=2):
    glyphs_width, letter_height = font.getsize(glyphs)
    image_width = glyphs_width + (len(glyphs) + 1) * margin
    img_main = Image.new('RGBA', (image_width, letter_height), BACKGROUND_COLOR)
    ctx_main = ImageDraw.Draw(img_main)
    img_glyphs = Image.new('1', (image_width, letter_height), 0)
    ctx_glyphs = ImageDraw.Draw(img_glyphs)
    left = 0
    for letter in glyphs:
        letter_width, letter_height = font.getsize(letter)
        ctx_main.rectangle((left, 0, left + margin - 1, letter_height), MARKER_COLOR)
        left += margin
        ctx_glyphs.text((left, 0), letter, font=font, fill=255)
        left += letter_width
    ctx_main.rectangle((image_width - margin, 0, image_width, letter_height), MARKER_COLOR)
    del ctx_main, ctx_glyphs
    for y in range(letter_height):
        for x in range(image_width):
          if img_glyphs.getpixel((x, y)):
              img_main.putpixel((x, y), FONT_COLOR)
    return img_main


def main():
    glyphs = ''.join(map(chr, range(32, 127) + range(160, 256)))
    font_path = sys.argv[1]
    output_path = sys.argv[2]
    font_size = 8

    font = ImageFont.truetype(font_path, font_size)
    create_bitmap_font(font, glyphs).save(output_path, 'PNG', optimize=True)


if __name__ == '__main__':
    main()