Project training of Shandong University rendering engine system (VI)

Catalog

Project introduction

NRD

Project objectives

Work at current stage

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Project introduction

NRD

full name Nvidia Real-time Denoiser , It is a spatiotemporal dual domain noise reduction library being developed by NVIDIA , Designed to deal with low RPP（ray per pixel） The signal .

The graphics of this technology API The environment is ：DirectX11、DirectX12 as well as Vulkun. There are three integration methods , One way is to use Nvidia Of NRI（NVIDIA Rendering Interface） Package the above three API, To integrate .

Project objectives

stay Falcor Integration under the framework nrd.

Work at current stage

Write function reinit(), Used to create a noise canceller instance .

    mpDenoiser = nullptr;

    const nrd::LibraryDesc& libraryDesc = nrd::GetLibraryDesc();

    const nrd::MethodDesc methods[] =
    {
        { getNrdMethod(mDenoisingMethod), uint16_t(mScreenSize.x), uint16_t(mScreenSize.y) }
    };

    nrd::DenoiserCreationDesc denoiserCreationDesc;
    

among LibraryDesc and DenoiserCreationDesc by nrd The structure of the definition

    struct LibraryDesc
    {
        SPIRVBindingOffsets spirvBindingOffsets;
        const Method* supportedMethods;
        uint32_t supportedMethodNum;
        uint8_t versionMajor;
        uint8_t versionMinor;
        uint8_t versionBuild;
    };

    struct DenoiserCreationDesc
    {
        MemoryAllocatorInterface memoryAllocatorInterface;
        const MethodDesc* requestedMethods;
        uint32_t requestedMethodNum;
        bool enableValidation : 1;
    };

Next is denoiserCreationDesc Member assignment in , Then with mpDenoiser Binding .

    denoiserCreationDesc.memoryAllocatorInterface.Allocate = nrdAllocate;
    denoiserCreationDesc.memoryAllocatorInterface.Reallocate = nrdReallocate;
    denoiserCreationDesc.memoryAllocatorInterface.Free = nrdFree;
    denoiserCreationDesc.requestedMethodNum = 1;
    denoiserCreationDesc.requestedMethods = methods;

    nrd::Result res = nrd::CreateDenoiser(denoiserCreationDesc, mpDenoiser);

Finally, create the asset and render pipeline , The two functions here will be documented in a later article .

    createResources();
    createPipelines();