Method and apparatus for processing fragment pixel information i

Details Method and apparatus for processing fragment pixel information i Method and apparatus for processing fragment pixel information i

1997-09-23

2000-08-15

Zimmerman, Mark K.

Computer graphics processing and selective visual display system

Computer graphics processing

Adjusting level of detail

345422, 345426, 345431, 345433, 345441, G06T 1700

Patent

active

061044075

ABSTRACT:
A method and apparatus for providing video graphics processing that includes anti-aliasing begins when a video graphics processor receives vertex parameters of an object-element and walks a first edge of the object element and a second edge of the object element. The video graphics processor walks the first and second edges based on calculations involving a decision corner and an error turn. The calculations indicate which direction to walk on a pixel by pixel basis, i.e., whether the walking should be in the major direction or the minor direction. The calculations also identify pixels that contain fragment pixel information, i.e., the pixels along the edges of the object element. For each fragment pixel, subpixel masks are created for each object element that is present in the fragmented pixel. From the subpixel masks, subpixel sequences are determined, which are used to produce pixel information of the fragment pixel.

REFERENCES:
patent: 5123085 (1992-06-01), Wells et al.
patent: 5854631 (1998-12-01), Akeley et al.
patent: 5864342 (1999-01-01), Kajiya et al.

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