plot glyphs in a specified font to images

font_plotter.py

from PIL import Image, ImageDraw, ImageFont

class FontPlotter:
    def __init__(self,font_size=200,convas_size=256):
        self._font_size = font_size
        self._convas_size = convas_size
        self._offset = int((convas_size - font_size) / 2)
        self._font = None

    def loadFont(self,filename):
        self._font = ImageFont.truetype(filename, size=self._font_size,encoding='unic')

    def plot(self,char):
        if self._font is None:
            raise RuntimeError('no font loaded')

        img = Image.new("RGB", (self._convas_size, self._convas_size), (255, 255, 255))
        draw = ImageDraw.Draw(img)
        draw.text((self._offset, self._offset), char, (0, 0, 0), font=self._font)
        return img


if __name__ == "__main__":
    plt = FontPlotter()
    plt.loadFont('miao.ttf')
    plt.plot('喵').save('喵.jpg')