Patent Document ID: 8638341
Application ID: 11876870
Patent Status: 1

Claim One:
1. A method of rendering an image, the method comprising: determining a plurality of transparencies of a destination pixel at a plurality of samples in the destination pixel; determining a plurality of transparencies of a source pixel at a plurality of samples in the source pixel based on a source coverage mask that indicates the samples of the source pixel which are covered by a polygon and based on a single transparency value for the source pixel, each of the transparencies of the source pixel being equal to the single transparency value for the source pixel multiplied by a respective one of a plurality of bits in the source coverage mask, the destination pixel being in front of the source pixel; and determining, by a graphics processor, a new pre-multiplied color of the destination pixel based on the transparencies of the destination pixel, the transparencies of the source pixel, a color of the source pixel and a pre-multiplied color of the destination pixel.