Method Prepare

Hydrogent/src/Tasks/HnRenderEnvMapTask.cpp:129–192

}

void HnRenderEnvMapTask::Prepare(pxr::HdTaskContext* TaskCtx,
                                 pxr::HdRenderIndex* RenderIndex)
{
    m_RenderIndex = RenderIndex;

    HnRenderDelegate* pRenderDelegate = static_cast<HnRenderDelegate*>(m_RenderIndex->GetRenderDelegate());

    if (!m_EnvMapRenderer)
    {
        if (HnRenderPassState* RenderPassState = GetRenderPassState(TaskCtx, m_RenderPassName))
        {
            EnvMapRenderer::CreateInfo EnvMapRndrCI;
            EnvMapRndrCI.pDevice            = pRenderDelegate->GetDevice();
            EnvMapRndrCI.pCameraAttribsCB   = pRenderDelegate->GetFrameAttribsCB();
            EnvMapRndrCI.PackMatrixRowMajor = true;
            EnvMapRndrCI.NumRenderTargets   = RenderPassState->GetNumRenderTargets();
            for (Uint32 rt = 0; rt < EnvMapRndrCI.NumRenderTargets; ++rt)
                EnvMapRndrCI.RTVFormats[rt] = RenderPassState->GetRenderTargetFormat(rt);
            EnvMapRndrCI.DSVFormat = RenderPassState->GetDepthStencilFormat();

            const std::string PSMain = GetEnvMapPSMain(EnvMapRndrCI.pDevice->GetDeviceInfo().IsGLDevice() ||
                                                       EnvMapRndrCI.pDevice->GetDeviceInfo().IsVulkanDevice() ||
                                                       EnvMapRndrCI.pDevice->GetDeviceInfo().IsWebGPUDevice());

            EnvMapRndrCI.PSMainSource = PSMain.c_str();

            m_EnvMapRenderer = std::make_unique<EnvMapRenderer>(EnvMapRndrCI);
        }
        else
        {
            UNEXPECTED("Render pass state is not set in the task context");
        }
    }

    auto USDRenderer = pRenderDelegate->GetUSDRenderer();
    if (!USDRenderer)
    {
        UNEXPECTED("USD renderer is not initialized");
        return;
    }

    auto* pEnvMapSRV = USDRenderer->GetPrefilteredEnvMapSRV();
    if (pEnvMapSRV == nullptr)
        return;

    Diligent::HLSL::ToneMappingAttribs TMAttribs;
    // Tone mapping is performed in the post-processing pass
    TMAttribs.iToneMappingMode     = TONE_MAPPING_MODE_NONE;
    TMAttribs.bAutoExposure        = 0;
    TMAttribs.fMiddleGray          = 0.18f;
    TMAttribs.bLightAdaptation     = 0;
    TMAttribs.fWhitePoint          = 3.0f;
    TMAttribs.fLuminanceSaturation = 1.0;

    EnvMapRenderer::RenderAttribs EnvMapAttribs;
    EnvMapAttribs.pEnvMap       = pEnvMapSRV;
    EnvMapAttribs.AverageLogLum = 0.3f;
    EnvMapAttribs.MipLevel      = 1;