Method getAvailableLayers

Engine/EffectInstance.cpp:4467–4535

void
EffectInstance::getAvailableLayers(double time, ViewIdx view, int inputNb, std::list<ImagePlaneDesc>* availableLayers)
{

    EffectInstPtr effect;
    if (inputNb >= 0) {
        effect = getInput(inputNb);
    } else {
        effect = shared_from_this();
    }
    if (!effect) {
        return;
    }


    std::list<ImagePlaneDesc> passThroughLayers;
    {


        EffectInstance::ComponentsNeededMap comps;
        double passThroughTime;
        int passThroughView;
        int passThroughInputNb;
        std::bitset<4> processChannels;
        bool processAll;
        effect->getComponentsNeededAndProduced_public(getRenderHash(), time, view, &comps, &passThroughLayers, &processAll, &passThroughTime, &passThroughView, &processChannels, &passThroughInputNb);

        // Merge pass-through planes produced + pass-through available planes and make it as the pass-through planes for this node
        // if they are not produced by this node
        std::list<ImagePlaneDesc>& outputLayers = (comps)[-1];
        mergeLayersList(outputLayers, &passThroughLayers);
    }

    // Ensure the color layer is always the first one available in the list
    bool hasColorPlane = false;
    for (std::list<ImagePlaneDesc>::iterator it = passThroughLayers.begin(); it != passThroughLayers.end(); ++it) {
        if (it->isColorPlane()) {
            hasColorPlane = true;
            availableLayers->push_front(*it);
            passThroughLayers.erase(it);
            break;
        }
    }

    // In output, also make available the default project layers and the user created components
    if (inputNb == -1) {

        std::list<ImagePlaneDesc> projectLayers = getApp()->getProject()->getProjectDefaultLayers();
        if (hasColorPlane) {
            // Don't add the color plane from the default alyers if already present
            for (std::list<ImagePlaneDesc>::iterator it = projectLayers.begin(); it != projectLayers.end(); ++it) {
                if (it->isColorPlane()) {
                    projectLayers.erase(it);
                    break;
                }
            }
        }
        mergeLayersList(projectLayers, availableLayers);