Graphical processing system, graphical pipeline and method...

Details Graphical processing system, graphical pipeline and method... Graphical processing system, graphical pipeline and method...

2005-06-03

2008-11-25

Tung, Kee M (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Attributes

Reexamination Certificate

active

07456846

ABSTRACT:
A system, apparatus, and method are disclosed for modifying positions of sample positions for selectably oversampling pixels to anti-alias non-geometric portions of computer-generated images, such as texture, at least in part, by shifting shading sample positions relative to a frame of reference. There is generally no relative motion between the geometries and the coverage sample positions. In one embodiment, an apparatus, such as a graphics pipeline and/or a general purpose graphics processing unit, anti-aliases geometries of a computer-generated object. The apparatus includes at least a texture unit and a pipeline front end unit to determine geometry coverage and a subpixel shifter to shift shading sample positions relative to the frame of reference. The apparatus can receive subpixel shifting masks to select subsets of shading sample positions. Each of the shading sample positions is shifted to a coverage sample position to reduce level of detail (“LOD”) artifacts.

REFERENCES:
patent: 6720975 (2004-04-01), Dietrich, Jr.
patent: 7369140 (2008-05-01), King et al.
patent: 2003/0029212 (2003-02-01), Im
patent: 2003/0117409 (2003-06-01), Lefebvre et al.
U.S. Appl. No. 10/658,056, filed Sep. 8, 2003, Bastos, et al.
U.S. Appl. No. 10/960,857, filed Oct. 7, 2004, Bastos, et al.

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