Method createReadNodeAndConnectGraph

Engine/WriteNode.cpp:638–702

}

void
WriteNodePrivate::createReadNodeAndConnectGraph(const std::string& filename)
{
    QString qpattern = QString::fromUtf8( filename.c_str() );
    std::string ext = QtCompat::removeFileExtension(qpattern).toLower().toStdString();
    boost::shared_ptr<NodeGroup> isNodeGroup = boost::dynamic_pointer_cast<NodeGroup>( _publicInterface->shared_from_this() );
    std::string readerPluginID = appPTR->getReaderPluginIDForFileType(ext);
    NodePtr writeNode = embeddedPlugin.lock();

    readBackNode.reset();
    if ( !readerPluginID.empty() ) {
        CreateNodeArgs args(readerPluginID, isNodeGroup );
        args.setProperty(kCreateNodeArgsPropNoNodeGUI, true);
        args.setProperty(kCreateNodeArgsPropOutOfProject, true);
        args.setProperty<std::string>(kCreateNodeArgsPropNodeInitialName, "internalDecoderNode");
        args.setProperty<bool>(kCreateNodeArgsPropAllowNonUserCreatablePlugins, true);

        //Set a pre-value for the inputfile knob only if it did not exist
        if ( !filename.empty() ) {
            args.addParamDefaultValue<std::string>(kOfxImageEffectFileParamName, filename);
        }

        if (writeNode) {
            double first, last;
            writeNode->getEffectInstance()->getFrameRange_public(writeNode->getEffectInstance()->getHash(), &first, &last);
            std::vector<int> originalRange(2);
            originalRange[0] = (int)first;
            originalRange[1] = (int)last;
            args.addParamDefaultValueN<int>(kReaderParamNameOriginalFrameRange, originalRange);
            args.addParamDefaultValue<int>(kParamFirstFrame, (int)first);
            args.addParamDefaultValue<int>(kParamFirstFrame, (int)last);
        }


        readBackNode = _publicInterface->getApp()->createNode(args);
    }

    NodePtr input = inputNode.lock(), output = outputNode.lock();
    assert(input && output);
    bool connectOutputToInput = true;
    if (writeNode) {
        writeNode->replaceInput(input, 0);
        NodePtr readNode = readBackNode.lock();
        if (readNode) {

            bool readFile = readBackKnob.lock()->getValue();
            if (readFile) {
                output->replaceInput(readNode, 0);
                connectOutputToInput = false;
            }
            readNode->replaceInput(input, 0);
            // sync the output colorspace of the reader from input colorspace of the writer

            KnobPtr outputWriteColorSpace = writeNode->getKnobByName(kOCIOParamOutputSpace);
            KnobPtr inputReadColorSpace = readNode->getKnobByName(kNatronReadNodeOCIOParamInputSpace);
            if (inputReadColorSpace && outputWriteColorSpace) {
                inputReadColorSpace->slaveTo(0, outputWriteColorSpace, 0);
            }