BOOKWALKER 图片提取

rerange.py

import json
from PIL import Image

coords = json.load(open('coords.json'))

for name, coord in coords.items():
    print(f'\r重排列 {name} ……', end='')
    try:
        img = Image.open(name)
        new = Image.new("RGB", img.size)

        for pos in coord:
            part = img.crop((pos[0], pos[1], pos[0] + pos[2], pos[1] + pos[3]))
            new.paste(part, (pos[4], pos[5], pos[4] + pos[6], pos[5] + pos[7]))

        new.save(name) #, quality=100, subsampling=0)
    except Exception as e:
        print(e)

userscript.js

// ==UserScript==
// @name         bookwalker 图片提取
// @namespace    Aloaxf
// @version      0.1
// @description  提取 bookwaler 中的图片
// @author       Aloxaf
// @updateURL    https://gist.githubusercontent.com/Aloxaf/016f4ed6f9fc823549754cf8bb566416/raw/ca6e27c979ca556f98147862824ec27c4b330f00/userscript.js
// @match        https://pcreader.bookwalker.com.tw/*
// @match        https://viewer.bookwalker.jp/*
// @icon         https://www.google.com/s2/favicons?domain=bookwalker.com.tw
// @require      https://cdn.jsdelivr.net/gh/eligrey/FileSaver.js@2.0.4/dist/FileSaver.min.js
// @require      https://cdn.jsdelivr.net/gh/Stuk/jszip@3.5.0/dist/jszip.min.js
// @require      https://cdn.jsdelivr.net/gh/stuk/jszip-utils@0.1.0/dist/jszip-utils.min.js
// @grant        unsafeWindow
// ==/UserScript==

function addToZip(name, url) {
  let content = new Promise((resolve, reject) => {
    JSZipUtils.getBinaryContent(url, (err, data) => {
      if (err) {
        reject(err);
      } else {
        resolve(data);
      }
    });
  });
  imagepack.file(name, content, {binary: true});
}

function drawImageHook(image, sx, sy, sWidth, sHeight, dx, dy, dWidth, dHeight) {
  if (image.src && image.src.indexOf('.jpeg') != -1) {
    let name = image.src.match(/(?<=\/)[^/]+(?=\.xhtml)/)[0] + ".jpeg";
    let count = Object.keys(coords).length + 1;
    if (!coords[name]) {
      console.log(`[${count}] downloading ${name}`);
      addToZip(name, image.src);
      coords[name] = new Set();
      if (autoscroll) {
        NFBR.a6G.Initializer.B0U.menu.a6l.moveToPage(count + 4);
      }
    }
    coords[name].add([sx, sy, sWidth, sHeight, dx, dy, dWidth, dHeight]);
  }
  return CanvasRenderingContext2D.prototype._drawImage.apply(this, arguments);
}

function setToJson(key, value) {
  if (typeof value === 'object' && value instanceof Set) {
    return [...value];
  }
  return value;
}

let imagepack = new JSZip();
let coords = {};
let autoscroll = false;

CanvasRenderingContext2D.prototype._drawImage = CanvasRenderingContext2D.prototype.drawImage;
CanvasRenderingContext2D.prototype.drawImage = drawImageHook;

unsafeWindow.saveAs = saveAs;
unsafeWindow.autoScroll = () => {
  autoscroll = true;
};
unsafeWindow.saveAsZip = () => {
  imagepack.file('coords.json', JSON.stringify(coords, setToJson));
  imagepack
    .generateAsync({type: "blob"})
    .then(blob => {
        saveAs(blob, "imagepack.zip");
    });
};

if (image.src && image.src.indexOf('.jpeg') != -1)

应该可以改成

if (image.src?.includes('.jpeg'))