Patent ID: 8004522
Filing Date: 2011-08-23
Classification: G06T

Abstract:
1. A computer-implemented graphics method comprising: identifying a reference vertex; representing the boundary of a surface as a plurality of straight line segments; successively superimposing a plurality of polygons onto the surface, each of the polygons having a vertex that coincides with the reference vertex and each of the polygons having an edge that coincides with one of the line segments; changing, using a rasterizer, a value of a coverage bit for a pixel each time a sample location associated with the coverage bit is covered by one of the polygons; storing, in a buffer, a resultant value of the coverage bit after the plurality of polygons are successively superimposed, the resultant value operable for use in subsequent rendering of the surface; and determining, using a shader, a color of the pixel using the resultant value of the coverage bit, wherein the shader is disabled in response to the rasterizer performing the changing operation and is enabled in response to the storing of the coverage bit.