Two-sided lighting in a single pass

Abstract

A graphics system for providing two-sided lighting. The graphics system may include a media processor and a hardware accelerator. The media processor may be configured to receive a stream of vertices, and to perform a two-sided lighting computation on each vertex resulting in front color and back color for each vertex. The hardware accelerator may be configured to (a) receive the vertices of the first stream along with the front and back color for each vertex, (b) assemble the vertices into polygons, (c) compute an orientation for each of the polygons, (d) select the front color or the back color of the vertices forming each polygon based on a result of the orientation computation for each polygon, and (e) render each polygon using the selected color of the vertices forming the polygon.

Dependencies are inferred from the claim text.