Computer graphics processing and selective visual display system – Computer graphic processing system – Plural graphics processors
Patent
1997-06-02
1999-06-29
Tung, Kee M.
Computer graphics processing and selective visual display system
Computer graphic processing system
Plural graphics processors
345430, 345513, 345519, G06T 120
Patent
active
059175036
ABSTRACT:
The present invention provides a converging data pipeline device comprising a first pipeline data path for carrying data, a second pipeline data path for carrying data, a shared pipeline data path which is capable of receiving data from each of the first and second pipeline data paths, and a resending mechanism comprised by the second pipeline data path. The resending mechanism makes a backup copy of at least a portion of the data at a particular location on the second path. Each of the paths comprises a plurality of pipeline stages, each pipeline stage capable of holding data and propagating the data in a direction from a first end of the path toward a second end of the path. The first end of the shared path is in communication with the second ends of the first and second data paths for receiving data from the second ends of the first and second data paths. When the flow of data is suspended along the second path, data is sent down the first path and through the shared path. This data will overwrite the data from the second path which was on the shared path when the flow of data on the second path was suspended. A backup copy of the overwritten data is stored in the resending mechanism. When the flow of data on the second path is resumed, the backup copy stored in the resending mechanism is sent through the second path and through the shared path so that the data which was overwritten is replaced. In accordance with the preferred embodiment of the present invention, the converging data pipeline device is implemented in a cache-based texel rasterizer of a computer graphics display system.
REFERENCES:
patent: 5544306 (1996-08-01), Deering et al.
patent: 5751292 (1998-05-01), Emmot
Bhamani Faisal
Emmot Darel N
Zakharia Khaled
Hewlett -Packard Company
Tung Kee M.
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