Patent ID: 6784895
Filing Date: 2004-08-31
Classification: G06T

Abstract:
A texture combine circuit for generating fragment graphics data for a pixel in a graphics processing system, comprising:a texture interpolation circuit having output terminals to provide a plurality of texture graphics data for the pixel; a first texture combine unit coupled to the output terminals of the texture interpolation circuit to receive the plurality of texture graphics data for the pixel and perform graphics combine operations on input data selected from the plurality of texture graphics data for the pixel to produce first combined graphics data at first texture combine unit output terminals; a second texture combine unit coupled to the output terminals of the texture interpolation circuit to receive the plurality of texture graphics data for the pixel and further coupled to the first texture combine unit output terminals to receive the first combined graphics data, the second texture combine unit performing graphics combine operations on the input data selected from the plurality of texture graphics data for the pixel and the first combined graphics data to produce second combined graphics data at second texture combine unit output terminals; and a third texture combine unit coupled to the texture interpolation circuit to receive the plurality of texture graphics data for the pixel and further coupled to the first and second output terminals to perform third graphics combine operations on a third group of data selected from the graphics data from the plurality of textures for the pixel, the first and the second resultant graphics values and provide third resultant graphics values resulting from the third graphics combine operations at third output terminals.