Method checkForPremultWarningAndCheckboxes

Engine/Node.cpp:11356–11421

}

void
Node::checkForPremultWarningAndCheckboxes()
{
    if ( isOutputNode() ) {
        return;
    }
    boost::shared_ptr<KnobBool> chans[4];
    boost::shared_ptr<KnobString> premultWarn = _imp->premultWarning.lock();
    if (!premultWarn) {
        return;
    }
    NodePtr prefInput = getPreferredInputNode();

    //Do not display a warning for Roto paint
    if ( !prefInput || _imp->effect->isRotoPaintNode() ) {
        //No input, do not warn
        premultWarn->setSecret(true);

        return;
    }
    for (int i = 0; i < 4; ++i) {
        chans[i] = _imp->enabledChan[i].lock();

        //No checkboxes
        if (!chans[i]) {
            premultWarn->setSecret(true);

            return;
        }

        //not RGBA
        if ( chans[i]->getIsSecret() ) {
            return;
        }
    }

    ImagePremultiplicationEnum premult = _imp->effect->getPremult();

    //not premult
    if (premult != eImagePremultiplicationPremultiplied) {
        premultWarn->setSecret(true);

        return;
    }

    bool checked[4];
    checked[3] = chans[3]->getValue();

    //alpha unchecked
    if (!checked[3]) {
        premultWarn->setSecret(true);

        return;
    }
    for (int i = 0; i < 3; ++i) {
        checked[i] = chans[i]->getValue();
        if (!checked[i]) {
            premultWarn->setSecret(false);