Method and processor for drawing `polygon with edge`-type primit

Details Method and processor for drawing `polygon with edge`-type primit Method and processor for drawing `polygon with edge`-type primit

1989-10-23

1993-11-23

Nguyen, Phu K.

395121, 395128, G06F 1572, G09G 106

Patent

active

052651983

ABSTRACT:
In a computer graphics display system, a method and processor are disclosed for drawing a `polygon with edge`-type primitive encountered in certain high level graphics interface programs. Both the method and processor use a mask buffer organized into a plurality of addressable constituent pixels, each pixel preferably being two bits deep. The method includes: masking the pixels in the mask buffer corresponding to the boundary to the polygon; drawing the pixels in the frame buffer of the display system corresponding to the boundary of the polygon; and drawing the pixels in the frame buffer corresponding to the interior of the polygon with reference to the content of the mask buffer. Corresponding processing steps for writing Z values in a depth buffer are also described. In addition, specific algorithms for implementing the method are set forth, along with an embodiment of a display processor implementing the method.

REFERENCES:
patent: 4586038 (1986-04-01), Sims et al.
patent: 4626838 (1986-12-01), Tsujioka et al.
patent: 4783832 (1988-11-01), Kaneko
patent: 4849906 (1989-07-01), Chodos et al.
patent: 4855938 (1989-08-01), Gonzalez-Lopez et al.
patent: 4901251 (1990-02-01), Sfarti
patent: 4918626 (1990-04-01), Watkins et al.
patent: 4945500 (1990-07-01), Deering
patent: 4951232 (1990-08-01), Hannah
patent: 4962468 (1990-10-01), Beauregard et al.
patent: 4979130 (1990-12-01), Li et al.
patent: 5001470 (1991-03-01), Bandai
patent: 5043921 (1991-08-01), Gonzalez-Lopez et al.
patent: 5088054 (1992-02-01), Paris, II
Fundamentals of Interactive Computer Graphics, Foley & Van Dam, pp. 456-461, 575-591.
R. W. Swanson and L. J. Thayer, "A fast shaded-polygon renderer", ACM Computer Graphics, vol. 20, No. 4, pp. 95-101, Aug. 1986.
IBM Technical Disclosure Bulletin, vol. 27, No. 12, May 1985 "Graphics Area Fill Algorithm", pp. 6994-6996.

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