Depth buffer compression

Depth buffer compression

  • CN 101,802,872 A
  • Filed: 09/12/2008
  • Published: 08/11/2010
  • Est. Priority Date: 09/12/2007
  • Status: Active Grant
First Claim
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1. One kind be used for selecting will be in the method for the compact model of depth buffer (20) application, described method comprises:

  • Acquisition is corresponding to the value of the sheet (30) of described depth buffer (20);

    Select first compact model (34) from more than first compact model;

    Compress the value of described (30), based on described first pattern (34) value of being compressed is write first, and use the main bit (34) of predetermined number store with described first pattern (34) and described first compression sizes in the relevant information of at least one item;

    Select the set of less important compact model (32) from more than second compact model;

    Determine to form a plurality of sub-sheet (28) of described (30), compress the value of described sub-sheet, described set based on less important compact model (32) writes second with the value of being compressed, and use the main bit (34) of identical predetermined number store with the described set of less important compact model (32) and described second compression sizes at least one relevant information;

    The compression sizes of the compression sizes of more described (30) and described sub-sheet (28);

    Choose the described set and the corresponding sheet size of described first pattern (34) or less important pattern (32) based on the result of described comparison;

    AndThe sheet of selected compression or sub-sheet stored in the described depth buffer (20) and the information relevant with the set of selected first pattern (34) or less important compact model (32) or corresponding size write into the main bit (34) of described predetermined number.

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