User:BlurredImages/vector.js

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The accompanying .css page for this skin is at User:BlurredImages/vector.css.

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  (function(document){
  
  var replace = function(img)  {
    var svgns = 'http://www.w3.org/2000/svg';
    var xlink = 'http://www.w3.org/1999/xlink';
    var imgid = img.src.replace(/[^a-zA-Z0-9]+/g, '');
    var svg = document.createElementNS(svgns, "svg");
    svg.setAttributeNS(null, "width", img.width);
    svg.setAttributeNS(null, "height", img.height);
    var filter = document.createElementNS(svgns, "filter");
    filter.setAttributeNS(null, "filterUnits", "objectBoundingBox");
    filter.setAttributeNS(null, "width", "120%");
    filter.setAttributeNS(null, "height", "120%");
    filter.setAttributeNS(null, "id", imgid);
    var blur = document.createElementNS(svgns, "feGaussianBlur");
    blur.setAttributeNS(null, "in", "SourceGraphic");
    blur.setAttributeNS(null, "result", "blur");

    // This might need to depend on image dimensions
    blur.setAttributeNS(null, "stdDeviation", "8");
    filter.appendChild(blur);
    svg.appendChild(filter);
    var image = document.createElementNS(svgns, "image");
    image.setAttributeNS(null, "width", img.width);
    image.setAttributeNS(null, "height", img.height);
    image.setAttributeNS(xlink, "xlink:href", img.src);
    image.setAttributeNS(null, "filter", "url(#" + imgid + ")");
    image.setAttributeNS(null, "class", "blurred");
    svg.appendChild(image);
    img.parentNode.insertBefore(svg, img);
    img.parentNode.removeChild(img);
  };
  
  var style = document.createElement("style");
  style.setAttribute("type", "text/css");
  style.textContent = ".blurred:hover { filter: none }";

  document.head.appendChild(style);

  
  [].forEach.call(document.querySelectorAll(".image img"), function(img) {
/*
    if (img.nodeName.toLowerCase() != "img")
      return;
    var view = img.ownerDocument.defaultView;
    var computed = view.getComputedStyle(img, '');
    if (computed.getPropertyValue('visibility') != 'hidden')
      return;
*/
    replace(img);
  });
  
  })(document);