Method execute

Source/RenderPasses/BSDFViewer/BSDFViewer.cpp:161–239

}

void BSDFViewer::execute(RenderContext* pRenderContext, const RenderData& renderData)
{
    // Update refresh flag if options that affect the output have changed.
    if (mOptionsChanged)
    {
        auto& dict = renderData.getDictionary();
        auto flags = dict.getValue(kRenderPassRefreshFlags, RenderPassRefreshFlags::None);
        dict[Falcor::kRenderPassRefreshFlags] = flags | Falcor::RenderPassRefreshFlags::RenderOptionsChanged;
        mOptionsChanged = false;
    }

    auto pOutput = renderData.getTexture(kOutput);
    if (!mpScene || mpScene->getMaterialCount() == 0)
    {
        pRenderContext->clearUAV(pOutput->getUAV().get(), uint4(0));
        return;
    }

    if (is_set(mpScene->getUpdates(), IScene::UpdateFlags::RecompileNeeded))
    {
        FALCOR_THROW("This render pass does not support scene changes that require shader recompilation.");
    }

    // Read back pixel data from the previous frame if available.
    // This ensures parameters get updated even if the UI wasn't rendered.
    readPixelData();

    // Set compile-time constants.
    if (mParams.useDisneyDiffuse)
        mpViewerPass->addDefine("DiffuseBrdf", "DiffuseBrdfDisney");
    else
        mpViewerPass->removeDefine("DiffuseBrdf");
    if (mParams.useSeparableMaskingShadowing)
        mpViewerPass->addDefine("SpecularMaskingFunction", "SpecularMaskingFunctionSmithGGXSeparable");
    else
        mpViewerPass->removeDefine("SpecularMaskingFunction");

    // Setup constants.
    mParams.cameraViewportScale = std::tan(math::radians(mParams.cameraFovY / 2.f)) * mParams.cameraDistance;
    mParams.useEnvMap = mUseEnvMap && mpEnvMap != nullptr;

    // Set resources.
    auto var = mpViewerPass->getRootVar()[kParameterBlockName];

    if (!mpPixelDataBuffer)
    {
        mpPixelDataBuffer = mpDevice->createStructuredBuffer(
            var["pixelData"], 1, ResourceBindFlags::UnorderedAccess, MemoryType::DeviceLocal, nullptr, false
        );
        mpPixelStagingBuffer =
            mpDevice->createStructuredBuffer(var["pixelData"], 1, ResourceBindFlags::None, MemoryType::ReadBack, nullptr, false);
    }

    var["params"].setBlob(mParams);
    var["outputColor"] = pOutput;
    var["pixelData"] = mpPixelDataBuffer;

    if (mParams.useEnvMap)