Depth offset compression

摘要

Zmin and Zmax are determined for depth offset compression. Then a check determines whether Zmin is equal to Zmax. If so, only one of Zmin and Zmax is used for depth offset compression and no index mask may be used. The bits that are saved thereby may be used for other purposes, including improving precision.

主权项

1. A method comprising:
determining, using a hardware processor, minimum depth (Zmin), and maximum depth (Zmax), residuals and Zmin/Zmax-index selection mask for depth offset compression; transforming unneeded bits allocated for one compression function to a different compression function; and detecting whether an index mask is all ones or zeros, and, if so, using unneeded bits of Zmin or Zmax to improve precision of the reference value or to redistribute the unneeded bits among the residuals.