Method getGSO

Source/Falcor/Core/State/GraphicsState.cpp:78–118

GraphicsState::~GraphicsState() = default;

ref<GraphicsStateObject> GraphicsState::getGSO(const ProgramVars* pVars)
{
    auto pProgramKernels = mpProgram ? mpProgram->getActiveVersion()->getKernels(mpDevice, pVars) : nullptr;
    bool newProgVersion = pProgramKernels.get() != mCachedData.pProgramKernels;
    if (newProgVersion)
    {
        mCachedData.pProgramKernels = pProgramKernels.get();
        mpGsoGraph->walk((void*)pProgramKernels.get());
    }

    const Fbo::Desc* pFboDesc = mpFbo ? &mpFbo->getDesc() : nullptr;
    if (mCachedData.pFboDesc != pFboDesc)
    {
        mpGsoGraph->walk((void*)pFboDesc);
        mCachedData.pFboDesc = pFboDesc;
    }

    ref<GraphicsStateObject> pGso = mpGsoGraph->getCurrentNode();
    if (pGso == nullptr)
    {
        mDesc.pProgramKernels = pProgramKernels;
        mDesc.fboDesc = mpFbo ? mpFbo->getDesc() : Fbo::Desc();
        mDesc.pVertexLayout = mpVao->getVertexLayout();
        mDesc.primitiveType = topology2Type(mpVao->getPrimitiveTopology());

        GraphicsStateGraph::CompareFunc cmpFunc = [&desc = mDesc](ref<GraphicsStateObject> pGso) -> bool
        { return pGso && (desc == pGso->getDesc()); };

        if (mpGsoGraph->scanForMatchingNode(cmpFunc))
        {
            pGso = mpGsoGraph->getCurrentNode();
        }
        else
        {
            pGso = mpDevice->createGraphicsStateObject(mDesc);
            pGso->breakStrongReferenceToDevice();
            mpGsoGraph->setCurrentNodeData(pGso);
        }
    }
    return pGso;
}

GraphicsState& GraphicsState::setFbo(const ref<Fbo>& pFbo, bool setVp0Sc0)
{