code: public void processContent(byte[] contentBytes, PdfDictionary resources) {
  		this.resources.push(resources);
  		try {
  			PdfContentParser ps = new PdfContentParser(new PRTokeniser(contentBytes));
  			ArrayList operands = new ArrayList();
  			while (ps.parse(operands).size() > 0) {
  				PdfLiteral operator = (PdfLiteral) operands.get(operands.size() - 1);
  				invokeOperator(operator, operands);
  			}
  		} catch (Exception e) {
  			throw new ExceptionConverter(e);
  		}
  		this.resources.pop();
  	}
docs: Processes PDF syntax
  @param contentBytes	the bytes of a content stream
  @param resources		the resources that come with the content stream