Heidi Class Reference

This appendix describes class hierarchy, classes, and data structures that the Heidi graphics library uses to communicate with drivers and applications.

Driver Class Hierarchy

Figure 1 is a representation of the driver class hierarchy.

Following are further explanations of the driver hierarchy boxes in figure 1:

• "Your driver" houses all of your hardware specific drawing routines and state.
• "HT_Device_Data" is the generic device class which has display capability. It contains the window id, colormap id and context id options. Use this class to derive renderers that display drawings.
• "HT_Physical_Renderer_Data" is the generic terminal renderer with no sink. Use this class to derive renderers that generate information about drawings(as opposed to drawing them).
• "HT_Renderer_Data" is the renderer base class. It houses the definition of the action table. It also contains window size, origin, buffer depth, color system, palette, and clipping fudge options. This class defines what a renderer can do.
• "Heidi Smart Pointer Class (HT_Counted:HT_Object)" is the ref counted "smart" pointer base class and has "automatic" memory management.

For more information and sample applications, see chapter 3, "Implementing a New Driver."

Class Reference

Following is a complete description of the Heidi graphics library classes and methods. They are listed in alphabetical order with sections describing the purpose, a synopsis of data members, operators, constructors, and detailed notes.

For a complete list of the Heidi classes in alphabetical order, see the "Contents"