hitodenize.user.js

// ==UserScript==
// @name           hitodenize
// @namespace      http://polog.org/
// @include        http://*
// @require        http://gist.github.com/3242.txt
// ==/UserScript==
// using $X http://gist.github.com/3242 by os0x
// http://d.hatena.ne.jp/hitode909/20100418/1271583701

function init(doc){
  $X('.//img | .//embed | ./object', doc).forEach(function(img){
    svg_filter(img);
  });
}

// http://d.hatena.ne.jp/javascripter/20090319/1237449590 by id:javascripter
var isAppended = false;
function svg_filter(element) {
  if (!isAppended) {
    document.documentElement.appendChild(
      E4XToDOM(
          <svg:svg xmlns:svg="http://www.w3.org/2000/svg" height="0">
          <svg:defs>
          <svg:filter id="reverse_filter">
          <svg:feColorMatrix type="matrix" values="-1 0 0 0 1  0 -1 0 0 1  0 0 -1 0 1  0 0 0 1 0"/>
          </svg:filter>
          </svg:defs>
          </svg:svg>
      )
    );
    isAppended = true;
  }
  element.style.cssText += 'filter: url("#reverse_filter");';
}

function E4XToDOM(xml) {
  return document.adoptNode(
    new DOMParser().parseFromString(xml.toXMLString(), "application/xml").documentElement
  );
}

init(document);
if(window.AutoPagerize)
  window.AutoPagerize.addFilter(function(docs){
    docs.forEach(function(doc){
      init(doc);
    });
  });