Early sample evaluation during coarse rasterization
US9495781B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2012 |
| Grant date | Nov 15, 2016 |
| Priority date | — |
| Expiry date | Apr 4, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T15/005
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A technique for early sample evaluation during coarse rasterization of primitives reduces the number of pixel tiles that are processed during fine rasterization of the primitive. A primitive bounding box determines when a primitive is small and may not actually cover any samples within at least one fine raster tile. Early sample evaluation is performed for the small primitive during coarse rasterization and the small primitive is discarded when no samples are actually covered by the small primitive. When the small primitive lies on a boundary between at least two fine raster tiles, early sample evaluation is performed during coarse rasterization to correctly identify which, if any, of the at least two fine raster tiles includes samples that are actually covered by the small primitive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.