Hierarchical tile-based rasterization algorithm
US8139058B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 2006 |
| Grant date | Mar 20, 2012 |
| Priority date | — |
| Expiry date | Nov 19, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T11/40
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A hierarchical tile-based rasterization method is disclosed. The inventive rasterization algorithm rasterizes pixels in hierarchical rectangles or blocks. The method includes: walking a plurality of tiles of pixels and determining if each tile is valid; breaking each valid tile into a plurality of subtiles and determining if each subtile is valid; breaking each valid subtile into a plurality of quads and determining if each quad is valid; and rendering pixels for each valid quad. These hierarchical levels of block validations are performed in parallel. The inventive rasterization algorithm is further implemented in hardware for better performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.