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watermarking_lab
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# Watermarking Lab
# 创建人：曾逸夫
# 创建时间：2022-08-08

import sys

import gradio as gr
from PIL import Image, ImageDraw, ImageFont

from util.fonts_opt import is_fonts

ROOT_PATH = sys.path[0]  # 根目录
DESCRIPTION = '''# Watermarking Lab v0.1'''


def watermarking(img, text, text_size, text_font, wm_location):
    text_size = int(text_size)
    draw = ImageDraw.Draw(img)

    font = ImageFont.truetype(f"./fonts/{text_font}.ttf", text_size)
    textwidth, textheight = draw.textsize(text, font)

    width, height = img.size
    if wm_location == "center":
        x = width / 2 - textwidth / 2
        y = height / 2 - textheight / 2
    elif wm_location == "bottom right":
        x = width - textwidth - text_size
        y = height - textheight - text_size

    draw.text((x, y), text, font=font)
    return img


def main():
    is_fonts(f"{ROOT_PATH}/fonts")  # 检查字体文件

    with gr.Blocks(css='style.css') as gyd:
        gr.Markdown(DESCRIPTION)
        with gr.Row():
            with gr.Column():
                with gr.Row():
                    input_img = gr.Image(image_mode="RGB", source="upload", type="pil", label="原始图片")
                with gr.Row():
                    wm_location = gr.Radio(choices=["center", "bottom right"], value="中间")
                with gr.Row():
                    wm_text = gr.Textbox(value="水印内容", label="水印内容")
                with gr.Row():
                    wm_textFont = gr.Dropdown(choices=["SimSun", "TimesNewRoman", "malgun"],
                                              value="TimesNewRoman",
                                              label="字体")
                with gr.Row():
                    wm_textSize = gr.Number(value=50, label="文字大小")

                with gr.Row():
                    btn_01 = gr.Button(value='加水印', variant="primary")

            with gr.Column():
                with gr.Row():
                    output_img = gr.Image(type="pil", label="水印图片")

        with gr.Row():
            example_list = [["./img_examples/bus.jpg", "Watermarking Text", 50, "TimesNewRoman", "bottom right"],
                            ["./img_examples/zidane.jpg", "水印文字", 50, "SimSun", "center"]]
            gr.Examples(example_list, [input_img, wm_text, wm_textSize, wm_textFont, wm_location],
                        output_img,
                        watermarking,
                        cache_examples=False)

        btn_01.click(fn=watermarking,
                     inputs=[input_img, wm_text, wm_textSize, wm_textFont, wm_location],
                     outputs=[output_img])

    gyd.launch(inbrowser=True)


if __name__ == '__main__':
    main()