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To: Jdaasoc who wrote (26952)	8/11/1999 9:54:00 PM
From: Jdaasoc	Read Replies (1) \| Respond to of 93625

Sorry Another from Cirrus Logic video graphics controller with RD this and RD that all over the place United States Patent 5,936,635 Larson , et al. August 10, 1999 -------------------------------------------------------------------------------- System and method of rendering polygons into a pixel grid Abstract A graphics system includes a graphics controller for rendering polygons with a minimum number of steps and registers. The graphics controller includes a register file for receiving initial parameters for the polygon from a host. The graphics controller also includes a polygon engine for loading parameters from the register file and using these parameters to generate a starting X value for each scan line and a width value for each scan line to permit efficient rendering of the polygon without "edge walking" the polygon. The polygon engine includes a counter and a pair of accumulators for defining the number of orthogonal scan lines, the X start value for each scan line, and the width of each scan. -------------------------------------------------------------------------------- Inventors: Larson; Michael Kerry (Austin, TX); Wilde; Daniel P. (Cedar Park, TX) Assignee: Cirrus Logic, Inc. (Fremont, CA) Appl. No.: 671977 Filed: June 28, 1996