Apparatus and method for specifying windows with priority ordered rectangles in a computer video graphics system
US5216413A · kind A · utility
23Cited by
46References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1991 |
| Grant date | Jun 1, 1993 |
| Priority date | — |
| Expiry date | Dec 4, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/08
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and a device for distinguishing which pixels are to be displayed in a set of overlapping, rectangular windows in video graphics display are provided. Windows are specified as a priority ordered list of rectangles or other shapes, so that each window is computed as being visible at those pixels that are inside its rectangle but outside the rectangles of all higher priority windows. The number of rectangles required is equal to the number of rectangular windows, irrespective of the degree of overlap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.