code: protected void prepareImageUrl(FacesContext context, StringBuffer results) throws IOException {
  
  		String src = (String) getAttributes().get("src");
  		boolean base64 = Boolean.parseBoolean((String) getAttributes().get("base64"));
  		prepareAttribute(results, "src", getImageUrl(context, src, base64));
  	}
docs: Prepare the image URL
  
  @param context
  the faces context
  @param results
  the result
  @throws IOException
  if an exception occurs