code: protected String getImgSrcToRender() throws JspException {
  
  		BinaryResourcesHandler binaryRsHandler = (BinaryResourcesHandler) pageContext.getServletContext()
  				.getAttribute(JawrConstant.BINARY_CONTEXT_ATTRIBUTE);
  		if (null == binaryRsHandler)
  			throw new JspException(
  					"You are using a Jawr image tag while the Jawr Binary servlet has not been initialized. Initialization of Jawr Image servlet either failed or never occurred.");
  
  		HttpServletResponse response = (HttpServletResponse) pageContext.getResponse();
  
  		HttpServletRequest request = (HttpServletRequest) pageContext.getRequest();
  
  		return ImageTagUtils.getImageUrl(src, base64, binaryRsHandler, request, response);
  	}
docs: Returns the image source to render
  
  @return the image source to render
  @throws JspException
  if a JSP exception occurs.