Pixel reordering for improved texture mapping
CA 2275237 C · Owner: Kuo, Dong-Ying · Inventors: Lahewala, Dinyar B.; Kuo, Dong-Ying; Cox, Michael B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system and method for reordering memory references for pixels to improved bandwidth and performance in texture mapping systems and other graphics systems by improving memory locality in conventional page-mode memory systems. Pixel memory references are received from a client graphics engine and placed in a pixel priority heap (202). The pixel priority heap (202) reorders the pixel memory references so that references requiring a currently open page are, in general, processed before references that require page breaks. Reordered pixel memory references are transmitted to a memory controller (204) for accessing memory (205, 207).
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
- Filed December 19, 1997 and granted December 3, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 19, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.