Revision control
++ // Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB).
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
++
++ #include "qshadergraphloader_p.h"
++
++ #include "qshadernodesloader_p.h"
++
++ #include <QtCore/qdebug.h>
++ #include <QtCore/qiodevice.h>
++ #include <QtCore/qjsonarray.h>
++ #include <QtCore/qjsondocument.h>
++ #include <QtCore/qjsonobject.h>
++ #include <QtCore/qmetaobject.h>
++
++ QT_BEGIN_NAMESPACE
++
++ namespace Qt3DRender
++ {
++ void qt_register_ShaderLanguage_enums();
++
++ QShaderGraphLoader::QShaderGraphLoader() noexcept
++ : m_status(Null),
++ m_device(nullptr)
++ {
++ qt_register_ShaderLanguage_enums();
++ }
++
++ QShaderGraphLoader::Status QShaderGraphLoader::status() const noexcept
++ {
++ return m_status;
++ }
++
++ QShaderGraph QShaderGraphLoader::graph() const noexcept
++ {
++ return m_graph;
++ }
++
++ QIODevice *QShaderGraphLoader::device() const noexcept
++ {
++ return m_device;
++ }
++
++ void QShaderGraphLoader::setDevice(QIODevice *device) noexcept
++ {
++ m_device = device;
++ m_graph = QShaderGraph();
++ m_status = !m_device ? Null
++ : (m_device->openMode() & QIODevice::ReadOnly) ? Waiting
++ : Error;
++ }
++
++ QHash<QString, QShaderNode> QShaderGraphLoader::prototypes() const noexcept
++ {
++ return m_prototypes;
++ }
++
++ void QShaderGraphLoader::setPrototypes(const QHash<QString, QShaderNode> &prototypes) noexcept
++ {
++ m_prototypes = prototypes;
++ }
++
++ void QShaderGraphLoader::load()
++ {
++ if (m_status == Error)
++ return;
++
++ auto error = QJsonParseError();
++ const QJsonDocument document = QJsonDocument::fromJson(m_device->readAll(), &error);
++
++ if (error.error != QJsonParseError::NoError) {
++ qWarning() << "Invalid JSON document:" << error.errorString();
++ m_status = Error;
++ return;
++ }
++
++ if (document.isEmpty() || !document.isObject()) {
++ qWarning() << "Invalid JSON document, root should be an object";
++ m_status = Error;
++ return;
++ }
++
++ const QJsonObject root = document.object();
++
++ const QJsonValue nodesValue = root.value(QStringLiteral("nodes"));
++ if (!nodesValue.isArray()) {
++ qWarning() << "Invalid nodes property, should be an array";
++ m_status = Error;
++ return;
++ }
++
++ const QJsonValue edgesValue = root.value(QStringLiteral("edges"));
++ if (!edgesValue.isArray()) {
++ qWarning() << "Invalid edges property, should be an array";
++ m_status = Error;
++ return;
++ }
++
++ bool hasError = false;
++
++ const QJsonValue prototypesValue = root.value(QStringLiteral("prototypes"));
++ if (!prototypesValue.isUndefined()) {
++ if (prototypesValue.isObject()) {
++ QShaderNodesLoader loader;
++ loader.load(prototypesValue.toObject());
++ m_prototypes.insert(loader.nodes());
++ } else {
++ qWarning() << "Invalid prototypes property, should be an object";
++ m_status = Error;
++ return;
++ }
++ }
++
++ const QJsonArray nodes = nodesValue.toArray();
++ for (const QJsonValue nodeValue : nodes) {
++ if (!nodeValue.isObject()) {
++ qWarning() << "Invalid node found";
++ hasError = true;
++ continue;
++ }
++
++ const QJsonObject nodeObject = nodeValue.toObject();
++
++ const QString uuidString = nodeObject.value(QStringLiteral("uuid")).toString();
++ const QUuid uuid = QUuid(uuidString);
++ if (uuid.isNull()) {
++ qWarning() << "Invalid UUID found in node:" << uuidString;
++ hasError = true;
++ continue;
++ }
++
++ const QString type = nodeObject.value(QStringLiteral("type")).toString();
++ if (!m_prototypes.contains(type)) {
++ qWarning() << "Unsupported node type found:" << type;
++ hasError = true;
++ continue;
++ }
++
++ const QJsonArray layersArray = nodeObject.value(QStringLiteral("layers")).toArray();
++ auto layers = QStringList();
++ for (const QJsonValue layerValue : layersArray)
++ layers.append(layerValue.toString());
++
++ QShaderNode node = m_prototypes.value(type);
++ node.setUuid(uuid);
++ node.setLayers(layers);
++
++ const QJsonValue parametersValue = nodeObject.value(QStringLiteral("parameters"));
++ if (parametersValue.isObject()) {
++ const QJsonObject parametersObject = parametersValue.toObject();
++ for (const QString ¶meterName : parametersObject.keys()) {
++ const QJsonValue parameterValue = parametersObject.value(parameterName);
++ if (parameterValue.isObject()) {
++ const QJsonObject parameterObject = parameterValue.toObject();
++ const QString type = parameterObject.value(QStringLiteral("type")).toString();
++ const QMetaType typeId = QMetaType::fromName(type.toUtf8());
++
++ const QString value = parameterObject.value(QStringLiteral("value")).toString();
++ auto variant = QVariant(value);
++
++ if (typeId.flags() & QMetaType::IsEnumeration) {
++ const QMetaObject *metaObject = typeId.metaObject();
++ const char *className = metaObject->className();
++ const QByteArray enumName = type.mid(static_cast<int>(qstrlen(className)) + 2).toUtf8();
++ const QMetaEnum metaEnum = metaObject->enumerator(metaObject->indexOfEnumerator(enumName));
++ const int enumValue = metaEnum.keyToValue(value.toUtf8());
++ variant = QVariant(enumValue);
++ variant.convert(typeId);
++ } else {
++ variant.convert(typeId);
++ }
++ node.setParameter(parameterName, variant);
++ } else {
++ node.setParameter(parameterName, parameterValue.toVariant());
++ }
++ }
++ }
++
++ m_graph.addNode(node);
++ }
++
++ const QJsonArray edges = edgesValue.toArray();
++ for (const QJsonValue edgeValue : edges) {
++ if (!edgeValue.isObject()) {
++ qWarning() << "Invalid edge found";
++ hasError = true;
++ continue;
++ }
++
++ const QJsonObject edgeObject = edgeValue.toObject();
++
++ const QString sourceUuidString = edgeObject.value(QStringLiteral("sourceUuid")).toString();
++ const QUuid sourceUuid = QUuid(sourceUuidString);
++ if (sourceUuid.isNull()) {
++ qWarning() << "Invalid source UUID found in edge:" << sourceUuidString;
++ hasError = true;
++ continue;
++ }
++
++ const QString sourcePort = edgeObject.value(QStringLiteral("sourcePort")).toString();
++
++ const QString targetUuidString = edgeObject.value(QStringLiteral("targetUuid")).toString();
++ const QUuid targetUuid = QUuid(targetUuidString);
++ if (targetUuid.isNull()) {
++ qWarning() << "Invalid target UUID found in edge:" << targetUuidString;
++ hasError = true;
++ continue;
++ }
++
++ const QString targetPort = edgeObject.value(QStringLiteral("targetPort")).toString();
++
++ const QJsonArray layersArray = edgeObject.value(QStringLiteral("layers")).toArray();
++ auto layers = QStringList();
++ for (const QJsonValue layerValue : layersArray)
++ layers.append(layerValue.toString());
++
++ auto edge = QShaderGraph::Edge();
++ edge.sourceNodeUuid = sourceUuid;
++ edge.sourcePortName = sourcePort;
++ edge.targetNodeUuid = targetUuid;
++ edge.targetPortName = targetPort;
++ edge.layers = layers;
++ m_graph.addEdge(edge);
++ }
++
++ if (hasError) {
++ m_status = Error;
++ m_graph = QShaderGraph();
++ } else {
++ m_status = Ready;
++ }
++ }
++ }
++ QT_END_NAMESPACE