void
ViewerNodePrivate::setAlphaChannelFromLayerIfRGBA()
{
ImagePlaneDesc selectedLayer, selectedAlphaLayer, selectedDisplayLayer;
int alphaChannelIndex;
ViewerInstancePtr internalViewer = internalViewerProcessNode[0].lock()->isEffectViewerInstance();
internalViewer->getChannelOptions(_publicInterface->getTimelineCurrentTime(), &selectedLayer, &selectedAlphaLayer, &alphaChannelIndex, &selectedDisplayLayer);
// Set the alpha channel to the selected layer's alpha channel if it is not pointing to anything
if (selectedLayer.getNumComponents() == 4 && selectedAlphaLayer.getNumComponents() == 0) {
ChoiceOption newOption = selectedLayer.getChannelOption(3);
KnobChoicePtr alphaChoice = alphaChannelKnob.lock();
std::vector<ChoiceOption> options = alphaChoice->getEntries();
for (std::size_t i = 0; i < options.size(); ++i) {
if (options[i].id == newOption.id) {
alphaChoice->setValue(i);
break;
}
}
}
}
