The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 26, 2001
Filed:
Jun. 30, 1998
Gautam Vaswani, Austin, TX (US);
Daniel P. Wilde, Cedar Park, TX (US);
Patrick Harkin, Austin, TX (US);
Cirrus Logic, Inc., Austin, TX (US);
Abstract
A graphics processor capable of rendering three-dimensional polygons with color, shading; and other visual effects also corrects interpolation errors that occur as a result of mapping the polygon to a pixel grid display. The processor renders polygons using an Incremental Line-Drawing algorithm and features an error correction circuit capable of adjusting the initial and incremental gradient parameters for each pixel characteristic and then rendering each scan line with the proper orthogonal adjustment. The error correction circuit includes an ortho correction engine for correcting errors in the initial and incremental pixel parameters and an ortho adjust engine to accommodate overflows in the x-coordinate calculations. The processor is able to render the polygons with monotonic gradients in color, shading, depth, and other visual characteristics without interpolation error.