Method CommitResources

Hydrogent/src/HnRenderDelegate.cpp:505–651

}

void HnRenderDelegate::CommitResources(pxr::HdChangeTracker* tracker)
{
    m_ResourceMgr->UpdateVertexBuffers(m_pDevice, m_pContext);
    m_ResourceMgr->UpdateIndexBuffer(m_pDevice, m_pContext);

    m_TextureRegistry.Commit(m_pContext);
    if (m_ShadowMapManager)
    {
        m_ShadowMapManager->Commit(m_pDevice, m_pContext);
        const Uint32 ShadowAtlasVersion = m_ShadowMapManager->GetAtlasVersion();
        if (m_ShadowAtlasVersion != ShadowAtlasVersion)
        {
            m_ShadowAtlasVersion = ShadowAtlasVersion;
            m_MainPassFrameAttribsSRB.Release();
        }
    }

    auto CreateFrameAttribsSRB = [this](Uint32 BufferRange, ITextureView* ShadowSRV) {
        RefCntAutoPtr<IShaderResourceBinding> SRB;
        m_USDRenderer->CreateResourceBinding(&SRB, 0);
        if (!SRB)
        {
            UNEXPECTED("Failed to create Frame Atttibs SRB");
            return SRB;
        }

        // Primitive attribs buffer is in SRB1
        constexpr bool BindPrimitiveAttribsBuffer = false;
        m_USDRenderer->InitCommonSRBVars(SRB,
                                         nullptr, // pFrameAttribs
                                         BindPrimitiveAttribsBuffer,
                                         ShadowSRV);
        if (auto* pVar = SRB->GetVariableByName(SHADER_TYPE_VERTEX, "cbFrameAttribs"))
        {
            // m_FrameAttribsCB has space for the main pass and all shadow passes.
            pVar->SetBufferRange(m_FrameAttribsCB, 0, BufferRange);
        }
        else
        {
            UNEXPECTED("cbFrameAttribs variable not found in the SRB");
        }

        return SRB;
    };

    // FrameAttribs
    //
    // ||                   Main Pass                  ||        Shadow Pass 1       ||  ...  ||       Shadow Pass N        ||
    // || Camera|PrevCamera|Renderer|Lights|ShadowMaps || Camera|PrevCamera|Renderer ||  ...  || Camera|PrevCamera|Renderer ||
    //  |<-------------------------------------------->||<-------------------------->||
    //      m_USDRenderer->GetPRBFrameAttribsSize()       USD_Renderer::GetPRBFrameAttribsSize(0, 0)
    if (!m_MainPassFrameAttribsSRB)
    {
        m_MainPassFrameAttribsSRB = CreateFrameAttribsSRB(m_USDRenderer->GetPRBFrameAttribsSize(), m_ShadowMapManager ? m_ShadowMapManager->GetShadowSRV() : nullptr);
    }
    if (m_ShadowMapManager && !m_ShadowPassFrameAttribs.SRB)
    {
        constexpr Uint32 LightCount                 = 0;