Font format
US5771034A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 5, 1997 |
| Grant date | Jun 23, 1998 |
| Priority date | — |
| Expiry date | May 5, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/24
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved font format for displaying text-based characters on pixel-oriented display devices. The improved font format includes a simplified header that includes font information and a plurality of flags indicating one of a plurality of predetermined formats for the plurality of glyph bitmaps. The header also includes a flag indicating whether the font was derived from a bitmapped font and a flag indicating whether the font is stored as a small format (i.e., less than 64k) or a large format (i.e., greater than 64k). A movable glyph offset table and a movable advance width table are also provided. To facilitate antialiased textout, additional background mode values are provided to allow for a blending of the glyphs into the background.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.