SVG.Image = SVG.invent({
  // Initialize node
  create: 'image'

  // Inherit from
, inherit: SVG.Shape

  // Add class methods
, extend: {
    // (re)load image
    load: function(url) {
      if (!url) return this

      var self = this
        , img  = document.createElement('img')
      
      /* preload image */
      img.onload = function() {
        var p = self.doc(SVG.Pattern)

        /* ensure image size */
        if (self.width() == 0 && self.height() == 0)
          self.size(img.width, img.height)

        /* ensure pattern size if not set */
        if (p && p.width() == 0 && p.height() == 0)
          p.size(self.width(), self.height())
        
        /* callback */
        if (typeof self._loaded == 'function')
          self._loaded.call(self, {
            width:  img.width
          , height: img.height
          , ratio:  img.width / img.height
          , url:    url
          })
      }

      return this.attr('href', (img.src = this.src = url), SVG.xlink)
    }
    // Add loade callback
  , loaded: function(loaded) {
      this._loaded = loaded
      return this
    }
  }
  
  // Add parent method
, construct: {
    // Create image element, load image and set its size
    image: function(source, width, height) {
      return this.put(new SVG.Image).load(source).size(width || 0, height || width || 0)
    }
  }
})