Generally, the present invention provides method and apparatus for supporting anti-aliasing oversampling in a video graphics system that utilizes a custom memory for storage of the frame buffer. The custom memory includes a memory array that stores the frame buffer as well as a data path that performs at least a portion of the blending operations associated with pixel fragments generated by a graphics procesor. The fragments produced by a graphics procesor are oversampled fragments such that each fragment may include a plurality of samples. If the sample set for a particular pixel location can be compressed, the compressed sample set is stored within the frame buffer of the custom memory circuit. However, if such compression is not possible, pointer information is stored within the frame buffer on the custom memory, and a sample memory controller included on the graphics procesor maintains a complete sample set for the pixel location within a sample memory. When the sample memory controller maintains a complete sample set for a pixel location, the frame buffer stores a pointer corresponding to the location of the sample set.
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