Pipelined 2D viewport clip circuit

Details Pipelined 2D viewport clip circuit Pipelined 2D viewport clip circuit

2007-12-18

2007-12-18

Harrison, Chante (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Graphic manipulation

C345S622000, C345S623000, C345S624000, C345S628000, C345S619000, C345S421000

Reexamination Certificate

active

10091176

ABSTRACT:
A system and method for performing viewport clipping for multiple viewports using a pipeline. The pixel address coordinates are compared against boundaries of a first viewport window. The results of this comparison, along with the pixel address coordinates, are registered and passed on to the next pipeline stage. There, the pixel address coordinates are compared against the boundaries of a second viewport window. The comparison results are combined with those passed from the previous stage, and the results are again registered. This scheme is repeated until the pixel has been tested against all the viewport window boundaries, with the intermediate results being combined into a single result indicative of whether the pixel is to be passed to the subsequent stages of the graphics pipeline or clipped.

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patent: 6831660 (2004-12-01), Kipping et al.
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