A conceptual model of raster graphics systems

  • Authors:
  • James Acquah;James Foley;John Sibert;Patricia Wenner

  • Affiliations:
  • Institute for Information Science and Technology, Department of Electrical Engineering and Computer Science, School of Engineering and Applied Science, The George Washington University, Washington ...;Institute for Information Science and Technology, Department of Electrical Engineering and Computer Science, School of Engineering and Applied Science, The George Washington University, Washington ...;Institute for Information Science and Technology, Department of Electrical Engineering and Computer Science, School of Engineering and Applied Science, The George Washington University, Washington ...;Institute for Information Science and Technology, Department of Electrical Engineering and Computer Science, School of Engineering and Applied Science, The George Washington University, Washington ...

  • Venue:
  • SIGGRAPH '82 Proceedings of the 9th annual conference on Computer graphics and interactive techniques
  • Year:
  • 1982

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Abstract

In this paper we present a conceptual model of raster graphics systems which integrates, at a suitable level of abstraction, the major features found in both contemporary and anticipated graphics systems. These features are the refresh buffer; the image creation (scan-conversion) system; the single address-space architecture which integrates the address space of the refresh buffer with those of the image creation system and the associated general-purpose computer; the RasterOp or BitBlt instructions found in some single address-space architectures; the video look-up table, and refresh buffer to screen transformations. Also included are the major components from the conceptual model of vector graphics systems which are embodied in the ACM/SIGGGRAPH/GSPC Core System. Using the conceptual model as a base, we proceed to sketch out the capabilities we have defined in a substantial addition to the Core System. The capabilities are currently being implemented as part of the George Washington University Core System.