Computer system with improved pixel processing capabilities

Details Computer system with improved pixel processing capabilities Computer system with improved pixel processing capabilities

1993-07-07

1998-06-30

Powell, Mark R.

Computer graphics processing and selective visual display system

Computer graphic processing system

Plural graphics processors

345501, 345503, 345522, 345441, G06F 1580

Patent

active

057741336

ABSTRACT:
A computer system having a pixel processing unit with multiple subprocessors receives positional data defining graphical objects from the CPU and writes pixel data into the image memory, and a display driver produces an image which partially includes the rendered pixels. The pixel processor is used to access patches of multiple contiguous pixels at a time, and process them in parallel. The patches used are defined, within the overall geometry of the image, to have aligned corners. The unit is also connected to receive synchronization signals from the display driver, conditioned on whether the current line being accessed by the driver is within a specified range of lines in the image space. The unit is operable to command the pixel processing unit to write pixel data corresponding to all pixels covered by a polygon, and in response traverses portions of the image space by scanning portions of one row of patches of pixels at a time, and for some of the patches, testing only the pixels at the leading edge of the patch in the direction of scanning.

REFERENCES:
patent: 4914729 (1990-04-01), Omori et al.
patent: 5136664 (1992-08-01), Bersack et al.
patent: 5170468 (1992-12-01), Shah et al.
patent: 5392385 (1995-02-01), Evangelisti et al.
patent: 5457775 (1995-10-01), Johnson, Jr. et al.

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