Graphics processing method and system for processing sub-primitives using sub-primitive indications in a control stream
US10249085B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2016 |
| Grant date | Apr 2, 2019 |
| Priority date | — |
| Expiry date | Jan 7, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T17/205
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
When untransformed display lists are used in a tile-based graphics processing system, the processing involved in deriving sub-primitives may need to be performed in both the geometry processing phase and the rasterization phase. To reduce the duplication of this processing, the control stream data for a tile includes sub-primitive indications to indicate which sub-primitives are to be used for rendering a tile. This allows the sub-primitives to be determined efficiently in the rasterization phase based on this information determined in the geometry processing phase. Furthermore, a hierarchical cache system may be used to store a hierarchy of graphics data items used for deriving sub-primitives. If graphics data items for deriving a sub-primitive are stored in the cache, the retrieval of these graphics data items from the cache in the rasterization phase can reduce the amount of processing performed to derive the sub-primitives.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.