# coding:utf-8

from PIL import Image, ImageDraw, ImageFont

def add_text_to_image(image, text):

    font = ImageFont.truetype('C:\Windows\Fonts\STXINGKA.TTF', 36)

    # 添加背景

    new_img = Image.new('RGBA', (image.size[0] * 3, image.size[1] * 3), (0, 0, 0, 0))

    new_img.paste(image, image.size)

    # 添加水印

    font_len = len(text)

    rgba_image = new_img.convert('RGBA')

    text_overlay = Image.new('RGBA', rgba_image.size, (255, 255, 255, 0))

    image_draw = ImageDraw.Draw(text_overlay)

    for i in range(0, rgba_image.size[0], font_len*40+100):

        for j in range(0, rgba_image.size[1], 200):

            image_draw.text((i, j), text, font=font, fill=(0, 0, 0, 50))

    text_overlay = text_overlay.rotate(-45)

    image_with_text = Image.alpha_composite(rgba_image, text_overlay)

    # 裁切图片

    image_with_text = image_with_text.crop((image.size[0], image.size[1], image.size[0] * 2, image.size[1] * 2))

    return image_with_text

if __name__ == '__main__':

    img = Image.open("test.jpg")

    im_after = add_text_to_image(img, u'测试使用')

    im_after.save(u'测试使用.png')