| 摘要 |
A z buffer stores compressed z data represented in a planar format for one or more tiles. The compressed format includes a set of tile specific coefficients defining a plane equation for each z tested primitive intersecting the tile. The z buffer stores a maximum number of sets of tile specific coefficients for each tile, and when the maximum number of sets is exceeded for a particular tile, an uncompressed format is used to store the z data for the particular tile.
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