Generating, storing, and displaying graphics using sub-pixel bitmaps

Abstract From the Canadian patent

A sub-pixel bitmap tile serving system configured to serve tiles in response to requests from a user comprises a plurality of front end tile servers for serving one or more sub-pixel bitmap tiles requested by a user. A request distributor distributes requests for sub-pixel bitmap tiles between the plurality of front end tile servers and a plurality of back end tile servers are communicatively coupled with the plurality of front end tile servers. Each back end tile server has access to the sub-pixel bitmap tiles and is configured to provide requested sub-pixel bitmap tiles to a corresponding front end tile server.