G - Physics – 09 – G
Patent
G - Physics
09
G
354/127, 375/21
G09G 5/393 (2006.01)
Patent
CA 1320586
ABSTRACT OF THE INVENTION In a computer graphics system in which information defining graphic images to be presented on an output display is available on a scan line basis for a pair of line segments subtending a portion of the an image to be presented, the information including the slope of each line segment and the addresses of each line segment on each scan line, a circuit comprising two comparator subportions, each of the comparator subportions being adapted to process information regarding one edge of the portion of the image to be presented and comprising apparatus for receiving first signals representing values of both of the line segments to be processed for one scan line, apparatus for comparing the signals to determine their relative X positions on the scan line, apparatus controlled by the determination of the relative X positions and the slope of each line segment for storing one of the signals compared, apparatus for receiving second signals representing values of both of the line segments to be processed for the same scan line, apparatus for comparing the second signals to determine their relative X positions on the scan line, and apparatus for comparing the second signals and the stored one of the signals to select a value for the edge of the particular scan line.
611652
Malachowsky Chris
Priem Curtis
Riches Mckenzie & Herbert Llp
Sun Microsystems Inc.
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