如何将单个BMP像素字符转换为TTF/OTF字体文件？

我正在使用Pillow制作像素字体，该工具可导出*.bmp文件。我希望将单个字符的*.bmp转换为*.ttf或*.otf格式。目前示例包含字符a（Unicode 0061）和p（Unicode 0070），后续会扩展至完整字母表。我已将BMP转为SVG，了解到Glyphs Mini 2、Font Forge等字体工具可导入SVG，但不知如何将单个SVG合并为有效的TTF/OTF字体文件。

以下是我将数组转为BMP再转SVG的Python代码示例：

from PIL import Image, ImageDraw
from potrace import Bitmap
import numpy as np
import os

# p
p = np.array(
    [
        [0, 0, 0, 0, 0],
        [0, 0, 0, 0, 0],
        [0, 0, 0, 0, 0],
        [0, 0, 0, 0, 0],
        [0, 0, 0, 0, 0],
        [0, 0, 0, 0, 0],
        [0, 0, 0, 0, 0],
        [0, 1, 1, 0, 0],
        [1, 0, 0, 1, 0],
        [1, 0, 0, 1, 0],
        [1, 0, 0, 1, 0],
        [1, 1, 1, 0, 0],
        [1, 0, 0, 0, 0],
        [1, 0, 0, 0, 0],
        [0, 0, 0, 0, 0],
        [0, 0, 0, 0, 0],
    ]
)

# a
a = np.array(
    [
        [0, 0, 0, 0, 0],
        [0, 0, 0, 0, 0],
        [0, 0, 0, 0, 0],
        [0, 0, 0, 0, 0],
        [0, 0, 0, 0, 0],
        [0, 0, 0, 0, 0],
        [0, 0, 0, 0, 0],
        [0, 1, 1, 0, 0],
        [1, 0, 0, 1, 0],
        [1, 0, 0, 1, 0],
        [1, 0, 0, 1, 0],
        [0, 1, 1, 1, 0],
        [0, 0, 0, 0, 0],
        [0, 0, 0, 0, 0],
        [0, 0, 0, 0, 0],
        [0, 0, 0, 0, 0],
    ]
)

dir_bmp = "bmp/"
dir_svg = "svg/"

def array_to_drawing(letter_name: str, array: np.array):
    """Converts a numpy array to a drawing.

    Args:
        letter_name (str): The name of the letter to save the image as.
        array (np.array): The 2D numpy array to convert.
    """
    # Create an image with a white background
    width = 320
    height = 1024
    img = Image.new("1", (width, height), color="white")

    # Create a draw object to draw on the image
    draw = ImageDraw.Draw(img)

    # Draw the letter which the 2d numpy array represents
    for row in range(array.shape[0]):
        for col in range(array.shape[1]):
            if array[row, col] == 1:
                x0 = col * 64
                y0 = row * 64
                draw.rectangle([x0, y0, x0 + 64, y0 - 64], fill="black")

    img.save(dir_bmp + letter_name + ".bmp")
    print(
        "potrace "
        + dir_bmp
        + letter_name
        + ".bmp --svg -o "
        + dir_svg
        + letter_name
        + ".svg"
    )
    os.system(
        "potrace "
        + dir_bmp
        + letter_name
        + ".bmp --svg -o "
        + dir_svg
        + letter_name
        + ".svg"
    )


array_to_drawing("p", p)
array_to_drawing("a", a)

字符预览 #

• 字符p：
• 字符a：

内容的提问来源于stack exchange，提问作者Alex