图片中插入数据

    def generate_certificate_completion(self, data):
        """图片中插入数据"""
        from PIL import ImageFont, Image, ImageDraw
        from app_config import FONT_DATA_PATH
        from app.util.ImageCrop import Graphics

        # 设置字体，如果没有，也可以不设置
        font = ImageFont.truetype(FONT_DATA_PATH, 20)  # Baidu and download file 罗西钢笔行楷.ttf

        # 打开底版图片
        show_url = Graphics.format_nginx_data_url(data["template_url"])

        imageFile = show_url
        im1 = Image.open(imageFile)

        start_at = self._time_array(data["start_at"])
        end_at = self._time_array(data["end_at"])
        issuing_at = datetime.now()

        # 在图片上添加文字
        draw = ImageDraw.Draw(im1)
        draw.text((110, 220), data["name"], (0, 0, 0), font)
        draw.text((325, 220), data["course_title"], (0, 0, 0), font)
        draw.text((520, 300), "优秀", (0, 0, 0), font)
        draw.text((110, 370), "证书编号: 00000000000001", (0, 0, 0), font)
        draw.text((158, 272), start_at["year"], (0, 0, 0), font)
        draw.text((215, 272), start_at["month"], (0, 0, 0), font)
        draw.text((250, 272), start_at["day"], (0, 0, 0), font)
        draw.text((300, 272), end_at["year"], (0, 0, 0), font)
        draw.text((355, 272), end_at["month"], (0, 0, 0), font)
        draw.text((388, 272), end_at["day"], (0, 0, 0), font)
        draw.text((130, 300), "01", (0, 0, 0), font)
        draw.text((520, 415), str(issuing_at.year), (0, 0, 0), font)
        draw.text((575, 415), str(issuing_at.month), (0, 0, 0), font)
        draw.text((602, 415), str(issuing_at.day), (0, 0, 0), font)

        # 保存
        content_type = show_url.rsplit('.', 1)[1]
        show_url = Graphics.upload_image(im1, "certificate", content_type)

        # 修改证书
        query = dict()
        query["certificate_url"] = show_url
        query["paper_status"] = "audit_success"
        self.certificate_update(data["id"], query)
        return {"errcode": 200, "errmsg": "ok", "data": show_url}

图片中插入头像的处理：

def book_page_avatar_processing(name, floor_map_url, avatar_url):
    from PIL import ImageFont, Image, ImageDraw
    from app_config import FONT_DATA_PATH
    from app.util.ImageCrop import Graphics

    # 设置字体，如果没有，也可以不设置
    font = ImageFont.truetype(FONT_DATA_PATH, 70)  # Baidu and download file 罗西钢笔行楷.ttf

    # 打开底版图片
    floor_map_file = Graphics.format_nginx_data_url(floor_map_url)
    im1 = Image.open(floor_map_file)

    # 在图片上添加文字
    draw = ImageDraw.Draw(im1)
    if len(name) > 8:
        draw.text((650, 410), name[8:], (0, 0, 0, 255), font)
    draw.text((650, 330), name, (0, 0, 0), font)

    # 打开头像图片
    avatar_file = Graphics.format_nginx_data_url(avatar_url)
    markImg = Image.open(avatar_file)
    markImg.thumbnail((330, 325))   # 压缩图片
    size = markImg.size

    # 因为是要圆形，所以需要正方形的图片
    r2 = min(size[0], size[1])
    if size[0] != size[1]:
        markImg = markImg.resize((r2, r2), Image.ANTIALIAS)

    # 最后生成圆的半径
    r3 = r2 / 2
    imb = Image.new('RGBA', (int(r3) * 2, int(r3) * 2), (255, 255, 255, 255))

    pima = markImg.load()  # 像素的访问对象
    pimb = imb.load()
    pim_back = im1.load()
    r = float(r2 / 2)  # 圆心横坐标
    for i in range(r2):
        for j in range(r2):
            lx = abs(i - r)  # 到圆心距离的横坐标
            ly = abs(j - r)  # 到圆心距离的纵坐标
            l = (pow(lx, 2) + pow(ly, 2)) ** 0.5  # 三角函数 半径

            if l < r3 - 4:
                pimb[i - (r - r3), j - (r - r3)] = pima[i, j]
            elif l > r3:
                # 大于半径的像素为背景图位置对应的像素，这样显示圆形头像四个角才能正常显示，pim_back为背景image对象
                pimb[i - (r - r3), j - (r - r3)] = pim_back[i + 141, j + 250]    # 头像外围四角按背景图片的图像处理
    im1.paste(imb, (142, 248))  # 头像的放置位置

    # 保存
    content_type = floor_map_file.rsplit('.', 1)[1]
    show_url = Graphics.upload_image(im1, "certificate", content_type)

    return {"errcode": 200, "errmsg": "ok", "data": show_url}