Method and system for efficient rendering of image component polygons
US6501474B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1999 |
| Grant date | Dec 31, 2002 |
| Priority date | — |
| Expiry date | Nov 29, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T15/80
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A graphics processing system includes an initial processing system that receives a command to render an image component polygon and generates parameters for calculating image values for the image component polygon. The graphics processing system also includes a backtrack register capable of storing a pixel location. A rasterization engine scans a pixel span in a selected direction and determines whether the pixel span is to be scanned in a direction opposite the selected direction. The rasterization engine stores a backtrack location in the backtrack register in response to a determination that the pixel span is to be scanned in a direction opposite the selected direction, and stores a location to begin scanning a subsequent pixel span in the backtrack register in response to a determination that a backtrack location is not stored in the backtrack register. The rasterization engine also calculates image values for each pixel in the pixel span in the current scan direction. A pixel data processing system receives the image values from the rasterization engine and stores the image values in a frame buffer for display. The graphics processing system has increased image rendering speed…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.