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High-Speed Rendering using Scan-Line Image Composition

This proposal describes a new architectural approach for high-speed rendering based on image-composition and scan-line rendering. The graphics database (or application producing graphics primitives) is partitioned and distributed over a homogeneous array of processors. Each processor transforms and rasterizes its respective primitives in scan-line order, computing subpixel information where appropriate. The pixel streams produced by the scan-line renderers are fed into an imagecomposition structure that combines them into a single pixel stream that describes the entire image. This pixel stream can either be stored in a conventional frame buffer, or, if the composition circuitry is sufficiently fast and if the flow of data is sufficiently uniform, it can drive a raster display directly. Such a system offers potential advantages of scalability over a wide performance range, low latency, and flexibility for many alternative input streams, such as volume data, and transparent surfaces. The object of this proposed research is to demonstrate that these properties can be achieved in a realizable system.