Method for Providing Subfont Caching in Hidden Refresh Buffer Space
Original Publication Date: 1987-May-01
Included in the Prior Art Database: 2005-Feb-01
In raster displays, one is often penalized (in terms of performance) for not using the invisible or hidden portions of the refresh buffer as the source for character raster mosaics when writing characters. On some local terminal support components, font sets are very large, often comprising more than 550 unique symbols which cover the gamut of requirements for most of the Latin alphabet languages of the world, mathematical symbols and line art symbols. In the typical case, most users rarely utilize the entire set of symbols in a font in any given document, let alone any screen representing a piece of a document. It is not uncommon to have multiple fonts in a document. Display management thus has the requirement to supply a small subset of many different fonts for a given screen.