Method and apparatus for optimizing selected raster operations
US5136524A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1990 |
| Grant date | Aug 4, 1992 |
| Priority date | — |
| Expiry date | Aug 3, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T17/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Circuitry for performing high speed operations on certain Boolean raster operations in a workstation whose functions include the display of graphics images using multiple planes and having foreground and background colors. The circuitry includes a logic circuit for determining whether a particular Boolean raster operation is one for which the high speed operation is available. A Boolean raster operation is determined to be available for high speed operation if the outcome of the operation can be determined by reading only one operand, namely the source data. If the other operand, namely the destination data, is needed to determine the outcome if the operation, then the operation is performed normally. Otherwise, the operation may be performed by reading the source data only.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.