Method and apparatus for generating a pixel using a...

Details Method and apparatus for generating a pixel using a... Method and apparatus for generating a pixel using a...

2006-03-15

2009-10-13

Nguyen, Phu K (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Attributes

C345S582000, C710S316000, C712S245000

Reexamination Certificate

active

07602399

ABSTRACT:
A device and method for controlling generation of a final pixel utilizes a conditional statement, referred to as an IF_NEIGHBOR statement, which when compiled, causes a programmable pixel shader to perform mip map texture lookups even if a pixel of interest does not meet the condition of the conditional statement. As such, any neighboring pixels needed for mip map selection have their associated shader code guaranteed to execute even though the pixel of interest may fail the conditional portion of the conditional statement. The device and method executes texture address calculations for pixels within a region and for pixels outside of a region but only those necessary to determine the mip map level corresponding to a pixel within the region. Execution of shader code for a current pixel is executed if any of the surrounding neighboring pixels meet the desired condition even if the current pixel does not meet the condition.

REFERENCES:
patent: 5598571 (1997-01-01), Gallup et al.
patent: 5664134 (1997-09-01), Gallup et al.
patent: 5742786 (1998-04-01), Gallup et al.
patent: 6085275 (2000-07-01), Gallup et al.

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