The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 11, 2007
Filed:
Aug. 06, 2004
Christopher J. Goodman, Round Rock, TX (US);
Craig M. Wittenbrink, Palo Alto, CA (US);
Robert J. Hasslen, Redwood City, CA (US);
Thomas M. Ogletree, Lakeway, TX (US);
Scott R. Whitman, Saratoga, CA (US);
Christopher J. Goodman, Round Rock, TX (US);
Craig M. Wittenbrink, Palo Alto, CA (US);
Robert J. Hasslen, Redwood City, CA (US);
Thomas M. Ogletree, Lakeway, TX (US);
Scott R. Whitman, Saratoga, CA (US);
NVIDIA Corporation, Santa Clara, CA (US);
Abstract
Graphics processing devices and methods are provided for culling small primitives that do not cover any pixels. A boundary (e.g., a diamond) is defined around a pixel center, with pixel coverage being determined for some types of primitives based on whether the boundary is crossed. The boundaries divide the raster into internal regions and external regions. Each region is assigned a unique canonical identifier. Each vertex of a primitive is assigned the canonical identifier corresponding to the region that contains that vertex. The canonical coordinates of the vertices are used to cull primitives that do not satisfy the boundary crossing coverage rules for any pixels.