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Efficient Adaptive Deferred Shading with Hardware Scatter Tiles

Published:26 August 2020Publication History
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Abstract

Adaptive shading is an effective mechanism for reducing the number of shaded pixels to a subset of the image resolution with minimal impact on final rendering quality. We present a new scheduling method based on on-chip tiles that, along with relatively minor modifications to the GPU architecture, provides efficient hardware support. As compared to software implementations on current hardware using compute shaders, our approach dramatically reduces memory bandwidth requirements, thereby significantly improving performance and energy use. We also introduce the concept of a fragment pre-shader for programmatically controlling when a fragment shader is invoked, and describe advanced techniques for utilizing our approach to further reduce the number of shaded pixels via temporal filtering, or to adjust rendering quality to maintain stable framerates.

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        cover image Proceedings of the ACM on Computer Graphics and Interactive Techniques
        Proceedings of the ACM on Computer Graphics and Interactive Techniques  Volume 3, Issue 2
        August 2020
        218 pages
        EISSN:2577-6193
        DOI:10.1145/3420254
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        Copyright © 2020 ACM

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        Association for Computing Machinery

        New York, NY, United States

        Publication History

        • Published: 26 August 2020
        Published in pacmcgit Volume 3, Issue 2

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