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1. (WO2003058557) EEFICIENT GRAPHICS STATE MANAGEMENT FOR ZONE RENDERING

Pub. No.:    WO/2003/058557    International Application No.:    PCT/US2002/040170
Publication Date: Jul 17, 2003 International Filing Date: Dec 12, 2002
IPC: G06T 1/60
G06T 15/00
Applicants: INTEL CORPORATION
Inventors: DOYLE, Peter
Title: EEFICIENT GRAPHICS STATE MANAGEMENT FOR ZONE RENDERING
Abstract:
The present invention provides a mechanism to track and manage graphics state with hardware state-binning logic for use with the the-based zone rendering method of generating graphical images. Only the current values of the dynamic state variables are maintained in hardware. Dynamic includes, but is not limited to, state variables that are considered likely to change between primitives. The set of dynamic state variables is subdivided into subgroups. Each state group is associated with a per-bin array of tracking bits. Whenever a state change is encountered, the tracking bit corresponding to the associated state group is set for all bins. Prior to placing a primitive in a bin, the tracking bits associated with that bin are examined, and the current state corresponding to set tracking bits is inserted in the bin before the primitive. Then the tracking bits for that bin are cleared.