Display controller with accelerated drawing of text strings
US5734873A · kind A · utility
4Cited by
2References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Mar 31, 1998 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T1/60
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A display controller includes a text engine which stores font information, including image and width information, in a unused portion of the frame buffer. A character string comprising width vectors and indices which point to the characters to be drawn, is passed to the display controller from the driver software. Once the character string is received, the text engine draws the indicated characters by reference to the font information previously stored in the character information memory by the driver, allowing the operating system to continue operations while the text string is being drawn to the viewport of the frame buffer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.