Method and apparatus for managing and accessing depth data...

Details Method and apparatus for managing and accessing depth data... Method and apparatus for managing and accessing depth data...

2005-11-01

2005-11-01

Zimmerman, Mark (Department: 2671)

Computer graphics processing and selective visual display system

Computer graphics processing

Three-dimension

Reexamination Certificate

active

06961057

ABSTRACT:
A computer graphics system provides for processing image data including Z data for use in displaying three-dimensional images on a display unit. The system includes: a depth buffer providing for temporary storage of Z data; and a graphics processing unit having a graphics engine for generating image data including Z data, and a memory interface unit communicatively coupled to the graphics engine and communicatively coupled to the depth buffer via a depth buffer interface. The graphics processing unit is operative to compress at least a portion of the generated Z data, to write the compressed portion of Z data to the depth buffer via the depth buffer interface in a compressed format, to read portions of compressed Z data from the depth buffer via the depth buffer interface, and to decompress the compressed Z data read from the buffer. An advantage of the present invention is that effective Z data bandwidth through the depth buffer interface is maximized in order to facilitate fast depth buffer access operations.

REFERENCES:
patent: 6252608 (2001-06-01), Snyder et al.

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