Method and apparatus for rasterizer interpolation

Details Method and apparatus for rasterizer interpolation Method and apparatus for rasterizer interpolation

2006-06-13

2006-06-13

Tung, Kee M. (Department: 2671)

Computer graphics processing and selective visual display system

Computer graphic processing system

Plural graphics processors

C345S421000

Reexamination Certificate

active

07061495

ABSTRACT:
The present invention relates to a rasterizer interpolator. In one embodiment, a setup unit is used to distribute graphics primitive instructions to multiple parallel rasterizers. To increase efficiency, the setup unit calculates the polygon data and checks it against one or more tiles prior to distribution. An output screen is divided into a number of regions, with a number of assignment configurations possible for various number of rasterizer pipelines. For instance, the screen is sub-divided into four regions and one of four rasterizers is granted ownership of one quarter of the screen. To reduce time spent on processing empty times, a problem in prior art implementations, the present invention reduces empty tiles by the process of coarse grain tiling. This process occurs by a series of iterations performed in parallel. Each region undergoes an iterative calculation/tiling process where coverage of the primitive is deduced at a successively more detailed level.

REFERENCES:
patent: 6323860 (2001-11-01), Zhu et al.
patent: 6344852 (2002-02-01), Zhu et al.
patent: 6380935 (2002-04-01), Heeschen et al.
patent: 6636232 (2003-10-01), Larson
patent: 6753878 (2004-06-01), Heirich et al.
patent: 6801203 (2004-10-01), Hussain

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