Line generation in a display system
CA 1304524 C · Owner: Bresenham, Jack E. · Inventors: Gay, Adrian Charles; Butler, Nicholas David; Bresenham, Jack E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention concerns a line generator and a method for determining the individual pixels to be plotted for a line to be drawn in a display system. Coded representations of a plurality of lines are stored in a line definition table, the coded representation of each individual line comprising a string of data items representing the transitions between adjacent pixels to be plotted for drawing said individual line. Preferably, only coded representations of lines up to a predetermined size (ie. the length of the line in the case of a straight line) are stored in the line definition table and strings of data items for representing the pixels to be plotted for longer lines to be drawn …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted June 30, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 30, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.