Sprite cursor with edge extension and clipping
US5185597A · kind A · utility
28Cited by
6References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1990 |
| Grant date | Feb 9, 1993 |
| Priority date | — |
| Expiry date | Dec 18, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/08
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A circuit for generating an N by M pixel sprite cursor having edge extension features which are clipped to only appear in preselected windows on a video display. The circuit provides edge extension by extending the pattern appearing in the pixels located along the four edges of the sprite cursor towards the corresponding boundaries of the display. The circuit clips the cursor to preselected windows by determining on a pixel-by pixel basis which window owns the pixel to be displayed and whether the window will permit a cursor to appear in it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.