Architecture support for window environments

The authors introduce a layered classification of visualization primitives, according to which graphics related functions are organized in four levels. The first level refers to drawing. That level is typically supported with dedicated graphics coprocessors, like TMS240xO. The second and third levels refer to handling of graphics objects in a window environment. Level four refers to multimedia integration. Hardware/software acceleration of functions on level two and three is the subject of this research. After a simulation-based statistical analysis of selected benchmark programs, four functions on levels two and three are selected as the most critically needing an acceleration. Algorithmic improvements are introduced for these four functions, and the details of their hardware and/or software support is explained. Results of an analytical analysis are also given.