EFFICIENT SETUP AND EVALUATION OF FILLED CUBIC BEZIER PATHS

摘要

A graphics processing system includes a central processing unit that processes a cubic Bezier curve corresponding to a filled cubic Bezier path. Additionally, the graphics processing system includes a cubic preprocessor coupled to the central processing unit that formats the cubic Bezier curve to provide a formatted cubic Bezier curve having quadrilateral control points corresponding to a mathematically simple cubic curve. The graphics processing system further includes a graphics processing unit coupled to the cubic preprocessor that employs the formatted cubic Bezier curve in rendering the filled cubic Bezier path. A rendering unit and a display cubic Bezier path filling method are also provided.

主权项

1. A display cubic Bezier path filling method, comprising:
subdividing a display cubic Bezier path into a set of cubic Bezier curves; formatting each of the set of cubic Bezier curves to provide a set of control points corresponding to a mathematically simple cubic curve; assigning texture coordinates to each of the set of control points for rendering each mathematically simple cubic curve; and evaluating a pixel sample during rendering of each mathematically simple cubic curve for inclusion or exclusion in filling the display cubic Bezier path.