Nvidia Corporation

Mark Dennis Stadler

Jerome Francis Duluk, Jr

Patrick Richard Brown

Jesse David Hall

Gernot Schaufler

One embodiment of the present invention sets forth a technique for storing only the enabled components for each enabled vector and writing only enabled components to one or more specified render targets. A shader program header (SPH) file provides per-component mask bits for each render target. Each enabled mask bit indicates that the pixel shader generates the corresponding component as an output to the raster operations unit. In the hardware, the per-component mask bits are combined with the applications programming interface (API)-level per-component write masks to determine the components that are updated by the shader program. The combined mask is used as the write enable bits for components in one or more render targets. One advantage of the combined mask is that the components that are not updated are not forwarded from the pixel shader to the ROP, thereby saving bandwidth between those processing units.

Pixel shader output map

One embodiment of the present invention sets forth a technique for configuring a graphics processing pipeline (GPP) to process data according to one or more shader programs. The method includes receiving a plurality of pointers, where each pointer references a different shader program header (SPH) included in a plurality of SPHs, and each SPH is associated with a different shader program that executes within the GPP. For each SPH included in the plurality of SPHs, one or more GPP configuration parameters included in the SPH are identified, and the GPP is adjusted based on the one or more GPP configuration parameters.

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Los Altos, CA, United States of America

Mark Dennis Stadler