The classes that implement graphic resources are IlvResource and its subclasses. There are six basic kinds of graphic drawing resources (subclasses of IlvResource) in Views: color, line style, pattern, color pattern, gradient pattern, and font, each supported by its corresponding class. Another subclass of IlvResource, the IlvPalette class, manages a group of resources. Additionally, IlvQuantizer is the abstract base class of all color conversion classes.