Patent ID: 9070213
Filing Date: 2015-06-30
Classification: G06T

Abstract:
1. In a raster stage of a graphics processor, a method for tile based precision rasterization comprising: receiving a graphics primitive for screen rasterization in a raster stage of a graphics processor; rasterizing the graphics primitive at a first level precision to generate a plurality of tiles of pixels using large integer operands of edge equations used to define said graphics primitive, wherein the rasterizing the graphics primitive comprises searching a grid of tiles to identify said plurality of tiles; and rasterizing the tiles at a second level precision to generate covered pixels, wherein the first level precision is higher than the second level precision, and wherein said second level of precision is based on a number of pixels in each of said plurality of tiles, wherein each of the plurality of tiles is divided into at least two portions and wherein the at least two portions are rasterized at a third level precision to address a plurality of pixels comprising each portion and wherein integer values for addressing the plurality of tiles at the first level precision are larger than integer values for addressing a plurality of pixels at the second level precision; and outputting the covered pixels for rendering operations in a subsequent stage of the graphics processor.