Nvidia Corporation

Pemith Randima Fernando

William P Newhall, Jr

Yury Y Uralsky

Alexander Lev Minkin

Christopher J Migdal

Anders M Kugler

Mehmet Cem Cebenoyan

Lup-Yen Peter Young

A method and system for generating shadows for a graphics processing unit. Specifically, the method determines whether a potential blocker occludes light from reaching a point of a scene in an image space. The light is generated from a light source. A width of a corresponding penumbra is determined for the point. The width is based on a width of the light source, a depth of the potential blocker from the light source, and a depth of a receiver from the light source. The receiver includes the point. A percentage closer filtering kernel size is scaled in proportion to the width of the corresponding penumbra. Thereafter, percentage closer filtering is performed for the point using the kernel size that is scaled in order to shade a pixel corresponding to the point.

Method and system for generating shadows in a graphics processing unit

A method and system for performing a texture operation with user-specified offset positions are disclosed. Specifically, one embodiment of the present invention sets forth a method, which includes the steps of deriving a first destined texel position based on an original sample position associated with a pixel projected in a texture map and a first offset position specified by a user and fetching texel attributes at the first destined texel position for the texture operation.

Method and system for processing texture samples with programmable offset positions

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Santa Clara, CA, United States of America

Pemith Randima Fernando