qt/qt3d/src/plugins/sceneparsers/gltf/gltfio.cpp

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++ // Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
++ // Copyright (C) 2016 The Qt Company Ltd and/or its subsidiary(-ies).
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
++
++ #include <Qt3DCore/QEntity>
++ #include <Qt3DCore/QTransform>
++ #include <Qt3DExtras/QDiffuseMapMaterial>
++ #include <Qt3DExtras/QDiffuseSpecularMapMaterial>
++ #include <Qt3DExtras/QNormalDiffuseMapMaterial>
++ #include <Qt3DExtras/QNormalDiffuseSpecularMapMaterial>
++ #include <Qt3DExtras/QPhongMaterial>
++ #include <Qt3DRender/QAlphaCoverage>
++ #include <Qt3DRender/QBlendEquation>
++ #include <Qt3DRender/QBlendEquationArguments>
++ #include <Qt3DRender/QCameraLens>
++ #include <Qt3DRender/QColorMask>
++ #include <Qt3DRender/QCullFace>
++ #include <Qt3DRender/QDepthTest>
++ #include <Qt3DRender/QEffect>
++ #include <Qt3DRender/QFrontFace>
++ #include <Qt3DRender/QGeometry>
++ #include <Qt3DRender/QGeometryRenderer>
++ #include <Qt3DRender/QGraphicsApiFilter>
++ #include <Qt3DRender/QMaterial>
++ #include <Qt3DRender/QNoDepthMask>
++ #include <Qt3DRender/QParameter>
++ #include <Qt3DRender/QPolygonOffset>
++ #include <Qt3DRender/QRenderState>
++ #include <Qt3DRender/QScissorTest>
++ #include <Qt3DRender/QShaderProgram>
++ #include <Qt3DRender/QTechnique>
++ #include <Qt3DRender/QTexture>
++ #include <QtCore/QDir>
++ #include <QtCore/QFileInfo>
++ #include <QtCore/QJsonArray>
++ #include <QtCore/QJsonObject>
++
++ #include <QtGui/qquaternion.h>
++ #include <QtGui/QVector2D>
++
++ #include "gltfio.h"
++
++ #include <Qt3DRender/private/qurlhelper_p.h>
++
++ #ifndef qUtf16PrintableImpl // -Impl is a Qt 5.8 feature
++ # define qUtf16PrintableImpl(string) \
++ static_cast<const wchar_t*>(static_cast<const void*>(string.utf16()))
++ #endif
++
++ QT_BEGIN_NAMESPACE
++
++ using namespace Qt3DCore;
++ using namespace Qt3DExtras;
++
++ namespace Qt3DRender {
++
++ Q_LOGGING_CATEGORY(GLTFIOLog, "Qt3D.GLTFIO")
++
++ #define KEY_CAMERA QLatin1String("camera")
++ #define KEY_CAMERAS QLatin1String("cameras")
++ #define KEY_SCENES QLatin1String("scenes")
++ #define KEY_NODES QLatin1String("nodes")
++ #define KEY_MESHES QLatin1String("meshes")
++ #define KEY_CHILDREN QLatin1String("children")
++ #define KEY_MATRIX QLatin1String("matrix")
++ #define KEY_ROTATION QLatin1String("rotation")
++ #define KEY_SCALE QLatin1String("scale")
++ #define KEY_TRANSLATION QLatin1String("translation")
++ #define KEY_TYPE QLatin1String("type")
++ #define KEY_PERSPECTIVE QLatin1String("perspective")
++ #define KEY_NAME QLatin1String("name")
++ #define KEY_COUNT QLatin1String("count")
++ #define KEY_YFOV QLatin1String("yfov")
++ #define KEY_ZNEAR QLatin1String("znear")
++ #define KEY_ZFAR QLatin1String("zfar")
++ #define KEY_MATERIALS QLatin1String("materials")
++ #define KEY_EXTENSIONS QLatin1String("extensions")
++ #define KEY_COMMON_MAT QLatin1String("KHR_materials_common")
++ #define KEY_TECHNIQUE QLatin1String("technique")
++ #define KEY_VALUES QLatin1String("values")
++ #define KEY_BUFFERS QLatin1String("buffers")
++ #define KEY_SHADERS QLatin1String("shaders")
++ #define KEY_PROGRAMS QLatin1String("programs")
++ #define KEY_PROGRAM QLatin1String("program")
++ #define KEY_TECHNIQUES QLatin1String("techniques")
++ #define KEY_ACCESSORS QLatin1String("accessors")
++ #define KEY_IMAGES QLatin1String("images")
++ #define KEY_TEXTURES QLatin1String("textures")
++ #define KEY_SCENE QLatin1String("scene")
++ #define KEY_BUFFER QLatin1String("buffer")
++ #define KEY_TARGET QLatin1String("target")
++ #define KEY_BYTE_OFFSET QLatin1String("byteOffset")
++ #define KEY_BYTE_LENGTH QLatin1String("byteLength")
++ #define KEY_BYTE_STRIDE QLatin1String("byteStride")
++ #define KEY_PRIMITIVES QLatin1String("primitives")
++ #define KEY_MODE QLatin1String("mode")
++ #define KEY_MATERIAL QLatin1String("material")
++ #define KEY_ATTRIBUTES QLatin1String("attributes")
++ #define KEY_INDICES QLatin1String("indices")
++ #define KEY_URI QLatin1String("uri")
++ #define KEY_FORMAT QLatin1String("format")
++ #define KEY_PASSES QLatin1String("passes")
++ #define KEY_SOURCE QLatin1String("source")
++ #define KEY_SAMPLER QLatin1String("sampler")
++ #define KEY_SAMPLERS QLatin1String("samplers")
++ #define KEY_SEMANTIC QLatin1String("semantic")
++ #define KEY_STATES QLatin1String("states")
++ #define KEY_UNIFORMS QLatin1String("uniforms")
++ #define KEY_PARAMETERS QLatin1String("parameters")
++ #define KEY_WRAP_S QLatin1String("wrapS")
++ #define KEY_MIN_FILTER QLatin1String("minFilter")
++ #define KEY_MAG_FILTER QLatin1String("magFilter")
++
++ #define KEY_INSTANCE_TECHNIQUE QLatin1String("instanceTechnique")
++ #define KEY_INSTANCE_PROGRAM QLatin1String("instanceProgram")
++ #define KEY_BUFFER_VIEWS QLatin1String("bufferViews")
++ #define KEY_BUFFER_VIEW QLatin1String("bufferView")
++ #define KEY_VERTEX_SHADER QLatin1String("vertexShader")
++ #define KEY_FRAGMENT_SHADER QLatin1String("fragmentShader")
++ #define KEY_INTERNAL_FORMAT QLatin1String("internalFormat")
++ #define KEY_COMPONENT_TYPE QLatin1String("componentType")
++ #define KEY_ASPECT_RATIO QLatin1String("aspect_ratio")
++ #define KEY_VALUE QLatin1String("value")
++ #define KEY_ENABLE QLatin1String("enable")
++ #define KEY_FUNCTIONS QLatin1String("functions")
++ #define KEY_TECHNIQUE_CORE QLatin1String("techniqueCore")
++ #define KEY_TECHNIQUE_GL2 QLatin1String("techniqueGL2")
++
++ GLTFIO::GLTFIO() : QSceneIOHandler(),
++ m_parseDone(false)
++ {
++ }
++
++ GLTFIO::~GLTFIO()
++ {
++
++ }
++
++ void GLTFIO::setBasePath(const QString& path)
++ {
++ m_basePath = path;
++ }
++
++ bool GLTFIO::setJSON(const QJsonDocument &json )
++ {
++ if ( !json.isObject() ) {
++ return false;
++ }
++
++ m_json = json;
++ m_parseDone = false;
++
++ cleanup();
++
++ return true;
++ }
++
++ /*
++ * Sets the \a path used by the parser to load the scene file.
++ * If the file is valid, parsing is automatically triggered.
++ */
++ void GLTFIO::setSource(const QUrl &source)
++ {
++ const QString path = QUrlHelper::urlToLocalFileOrQrc(source);
++ QFileInfo finfo(path);
++ if (Q_UNLIKELY(!finfo.exists())) {
++ qCWarning(GLTFIOLog, "missing file: %ls", qUtf16PrintableImpl(path));
++ return;
++ }
++ QFile f(path);
++ f.open(QIODevice::ReadOnly);
++
++ QByteArray jsonData = f.readAll();
++ QJsonDocument sceneDocument = QJsonDocument::fromBinaryData(jsonData);
++ if (sceneDocument.isNull())
++ sceneDocument = QJsonDocument::fromJson(jsonData);
++
++ if (Q_UNLIKELY(!setJSON(sceneDocument))) {
++ qCWarning(GLTFIOLog, "not a JSON document");
++ return;
++ }
++
++ setBasePath(finfo.dir().absolutePath());
++ }
++
++ /*
++ * Returns true if the extension of \a path is supported by the
++ * GLTF parser.
++ */
++ bool GLTFIO::isFileTypeSupported(const QUrl &source) const
++ {
++ const QString path = QUrlHelper::urlToLocalFileOrQrc(source);
++ return GLTFIO::isGLTFPath(path);
++ }
++
++ Qt3DCore::QEntity* GLTFIO::node(const QString &id)
++ {
++ QJsonObject nodes = m_json.object().value(KEY_NODES).toObject();
++ const auto jsonVal = nodes.value(id);
++ if (Q_UNLIKELY(jsonVal.isUndefined())) {
++ qCWarning(GLTFIOLog, "unknown node %ls in GLTF file %ls",
++ qUtf16PrintableImpl(id), qUtf16PrintableImpl(m_basePath));
++ return NULL;
++ }
++
++ const QJsonObject jsonObj = jsonVal.toObject();
++ QEntity* result = nullptr;
++
++ // Qt3D has a limitation that a QEntity can only have 1 mesh and 1 material component
++ // So if the node has only 1 mesh, we only create 1 QEntity
++ // Otherwise if there are n meshes, there is 1 QEntity, with n children for each mesh/material combo
++ {
++ QList<QEntity *> entities;
++
++ const auto meshes = jsonObj.value(KEY_MESHES).toArray();
++ for (const QJsonValue &mesh : meshes) {
++ const QString meshName = mesh.toString();
++ const auto geometryRenderers = std::as_const(m_meshDict).equal_range(meshName);
++ if (Q_UNLIKELY(geometryRenderers.first == geometryRenderers.second)) {
++ qCWarning(GLTFIOLog, "node %ls references unknown mesh %ls",
++ qUtf16PrintableImpl(id), qUtf16PrintableImpl(meshName));
++ continue;
++ }
++
++ for (auto it = geometryRenderers.first; it != geometryRenderers.second; ++it) {
++ QGeometryRenderer *geometryRenderer = it.value();
++ QEntity *entity = new QEntity;
++ entity->addComponent(geometryRenderer);
++ QMaterial *mat = material(m_meshMaterialDict[geometryRenderer]);
++ if (mat)
++ entity->addComponent(mat);
++ entities.append(entity);
++ }
++
++ }
++
++ switch (entities.size()) {
++ case 0:
++ break;
++ case 1:
++ result = std::as_const(entities).first();
++ break;
++ default:
++ result = new QEntity;
++ for (QEntity *entity : std::as_const(entities))
++ entity->setParent(result);
++ }
++ }
++
++ //If the entity contains no meshes, results will still be null here
++ if (result == nullptr)
++ result = new QEntity;
++
++ {
++ const auto children = jsonObj.value(KEY_CHILDREN).toArray();
++ for (const QJsonValue &c : children) {
++ QEntity* child = node(c.toString());
++ if (!child)
++ continue;
++ child->setParent(result);
++ }
++ }
++
++ renameFromJson(jsonObj, result);
++
++
++ // Node Transforms
++ Qt3DCore::QTransform *trans = nullptr;
++ const auto matrix = jsonObj.value(KEY_MATRIX);
++ if (!matrix.isUndefined()) {
++ QMatrix4x4 m(Qt::Uninitialized);
++
++ QJsonArray matrixValues = matrix.toArray();
++ for (int i=0; i<16; ++i) {
++ double v = matrixValues.at( i ).toDouble();
++ m(i % 4, i >> 2) = v;
++ }
++
++ // ADD MATRIX TRANSFORM COMPONENT TO ENTITY
++ if (trans == nullptr)
++ trans = new Qt3DCore::QTransform;
++ trans->setMatrix(m);
++ }
++
++ // Rotation quaternion
++ const auto rotation = jsonObj.value(KEY_ROTATION);
++ if (!rotation.isUndefined()) {
++ if (!trans)
++ trans = new Qt3DCore::QTransform;
++
++ const QJsonArray quaternionValues = rotation.toArray();
++ QQuaternion quaternion(quaternionValues[0].toDouble(),
++ quaternionValues[1].toDouble(),
++ quaternionValues[2].toDouble(),
++ quaternionValues[3].toDouble());
++ trans->setRotation(quaternion);
++ }
++
++ // Translation
++ const auto translation = jsonObj.value(KEY_TRANSLATION);
++ if (!translation.isUndefined()) {
++ if (!trans)
++ trans = new Qt3DCore::QTransform;
++
++ const QJsonArray translationValues = translation.toArray();
++ trans->setTranslation(QVector3D(translationValues[0].toDouble(),
++ translationValues[1].toDouble(),
++ translationValues[2].toDouble()));
++ }
++
++ // Scale
++ const auto scale = jsonObj.value(KEY_SCALE);
++ if (!scale.isUndefined()) {
++ if (!trans)
++ trans = new Qt3DCore::QTransform;
++
++ const QJsonArray scaleValues = scale.toArray();
++ trans->setScale3D(QVector3D(scaleValues[0].toDouble(),
++ scaleValues[1].toDouble(),
++ scaleValues[2].toDouble()));
++ }
++
++ // Add the Transform component
++ if (trans != nullptr)
++ result->addComponent(trans);
++
++ const auto cameraVal = jsonObj.value(KEY_CAMERA);
++ if (!cameraVal.isUndefined()) {
++ QCameraLens* cam = camera(cameraVal.toString());
++ if (Q_UNLIKELY(!cam)) {
++ qCWarning(GLTFIOLog) << "failed to build camera:" << cameraVal
++ << "on node" << id;
++ } else {
++ result->addComponent(cam);
++ }
++ } // of have camera attribute
++
++ return result;
++ }
++
++ Qt3DCore::QEntity* GLTFIO::scene(const QString &id)
++ {
++ parse();
++
++ QJsonObject scenes = m_json.object().value(KEY_SCENES).toObject();
++ const auto sceneVal = scenes.value(id);
++ if (Q_UNLIKELY(sceneVal.isUndefined())) {
++ if (Q_UNLIKELY(!id.isNull()))
++ qCWarning(GLTFIOLog, "GLTF: no such scene %ls in file %ls",
++ qUtf16PrintableImpl(id), qUtf16PrintableImpl(m_basePath));
++ return defaultScene();
++ }
++
++ QJsonObject sceneObj = sceneVal.toObject();
++ QEntity* sceneEntity = new QEntity;
++ const auto nodes = sceneObj.value(KEY_NODES).toArray();
++ for (const QJsonValue &nnv : nodes) {
++ QString nodeName = nnv.toString();
++ QEntity* child = node(nodeName);
++ if (!child)
++ continue;
++ child->setParent(sceneEntity);
++ }
++
++ return sceneEntity;
++ }
++
++ GLTFIO::BufferData::BufferData()
++ : length(0)
++ , data(nullptr)
++ {
++ }
++
++ GLTFIO::BufferData::BufferData(const QJsonObject &json)
++ : length(json.value(KEY_BYTE_LENGTH).toInt()),
++ path(json.value(KEY_URI).toString()),
++ data(nullptr)
++ {
++ }
++
++ GLTFIO::ParameterData::ParameterData() :
++ type(0)
++ {
++
++ }
++
++ GLTFIO::ParameterData::ParameterData(const QJsonObject &json)
++ : semantic(json.value(KEY_SEMANTIC).toString()),
++ type(json.value(KEY_TYPE).toInt())
++ {
++ }
++
++ GLTFIO::AccessorData::AccessorData()
++ : type(QAttribute::Float)
++ , dataSize(0)
++ , count(0)
++ , offset(0)
++ , stride(0)
++ {
++
++ }
++
++ GLTFIO::AccessorData::AccessorData(const QJsonObject &json)
++ : bufferViewName(json.value(KEY_BUFFER_VIEW).toString()),
++ type(accessorTypeFromJSON(json.value(KEY_COMPONENT_TYPE).toInt())),
++ dataSize(accessorDataSizeFromJson(json.value(KEY_TYPE).toString())),
++ count(json.value(KEY_COUNT).toInt()),
++ offset(0),
++ stride(0)
++ {
++ const auto byteOffset = json.value(KEY_BYTE_OFFSET);
++ if (!byteOffset.isUndefined())
++ offset = byteOffset.toInt();
++ const auto byteStride = json.value(KEY_BYTE_STRIDE);
++ if (!byteStride.isUndefined())
++ stride = byteStride.toInt();
++ }
++
++ bool GLTFIO::isGLTFPath(const QString& path)
++ {
++ QFileInfo finfo(path);
++ if (!finfo.exists())
++ return false;
++
++ // might need to detect other things in the future, but would
++ // prefer to avoid doing a full parse.
++ QString suffix = finfo.suffix().toLower();
++ return suffix == QLatin1String("json") || suffix == QLatin1String("gltf") || suffix == QLatin1String("qgltf");
++ }
++
++ void GLTFIO::renameFromJson(const QJsonObject &json, QObject * const object)
++ {
++ const auto name = json.value(KEY_NAME);
++ if (!name.isUndefined())
++ object->setObjectName(name.toString());
++ }
++
++ bool GLTFIO::hasStandardUniformNameFromSemantic(const QString &semantic)
++ {
++ //Standard Uniforms
++ if (semantic.isEmpty())
++ return false;
++ switch (semantic.at(0).toLatin1()) {
++ case 'L':
++ // return semantic == QLatin1String("LOCAL");
++ return false;
++ case 'M':
++ return semantic == QLatin1String("MODEL")
++ || semantic == QLatin1String("MODELVIEW")
++ || semantic == QLatin1String("MODELVIEWPROJECTION")
++ || semantic == QLatin1String("MODELINVERSE")
++ || semantic == QLatin1String("MODELVIEWPROJECTIONINVERSE")
++ || semantic == QLatin1String("MODELINVERSETRANSPOSE")
++ || semantic == QLatin1String("MODELVIEWINVERSETRANSPOSE");
++ case 'V':
++ return semantic == QLatin1String("VIEW")
++ || semantic == QLatin1String("VIEWINVERSE")
++ || semantic == QLatin1String("VIEWPORT");
++ case 'P':
++ return semantic == QLatin1String("PROJECTION")
++ || semantic == QLatin1String("PROJECTIONINVERSE");
++ }
++ return false;
++ }
++
++ QString GLTFIO::standardAttributeNameFromSemantic(const QString &semantic)
++ {
++ //Standard Attributes
++ if (semantic.startsWith(QLatin1String("POSITION")))
++ return QAttribute::defaultPositionAttributeName();
++ if (semantic.startsWith(QLatin1String("NORMAL")))
++ return QAttribute::defaultNormalAttributeName();
++ if (semantic.startsWith(QLatin1String("TEXCOORD")))
++ return QAttribute::defaultTextureCoordinateAttributeName();
++ if (semantic.startsWith(QLatin1String("COLOR")))
++ return QAttribute::defaultColorAttributeName();
++ if (semantic.startsWith(QLatin1String("TANGENT")))
++ return QAttribute::defaultTangentAttributeName();
++
++ // if (semantic.startsWith(QLatin1String("JOINT")));
++ // if (semantic.startsWith(QLatin1String("JOINTMATRIX")));
++ // if (semantic.startsWith(QLatin1String("WEIGHT")));
++
++ return QString();
++ }
++
++ QParameter *GLTFIO::parameterFromTechnique(QTechnique *technique, const QString &parameterName)
++ {
++ const auto parameters = technique->parameters();
++ for (QParameter *parameter : parameters) {
++ if (parameter->name() == parameterName) {
++ return parameter;
++ }
++ }
++
++ return nullptr;
++ }
++
++ Qt3DCore::QEntity* GLTFIO::defaultScene()
++ {
++ if (Q_UNLIKELY(m_defaultScene.isEmpty())) {
++ qCWarning(GLTFIOLog, "no default scene");
++ return NULL;
++ }
++
++ return scene(m_defaultScene);
++ }
++
++ QMaterial *GLTFIO::materialWithCustomShader(const QString &id, const QJsonObject &jsonObj)
++ {
++ //Default ES2 Technique
++ QString techniqueName = jsonObj.value(KEY_TECHNIQUE).toString();
++ const auto it = std::as_const(m_techniques).find(techniqueName);
++ if (Q_UNLIKELY(it == m_techniques.cend())) {
++ qCWarning(GLTFIOLog, "unknown technique %ls for material %ls in GLTF file %ls",
++ qUtf16PrintableImpl(techniqueName), qUtf16PrintableImpl(id), qUtf16PrintableImpl(m_basePath));
++ return NULL;
++ }
++ QTechnique *technique = *it;
++ technique->graphicsApiFilter()->setApi(QGraphicsApiFilter::OpenGLES);
++ technique->graphicsApiFilter()->setMajorVersion(2);
++ technique->graphicsApiFilter()->setMinorVersion(0);
++ technique->graphicsApiFilter()->setProfile(QGraphicsApiFilter::NoProfile);
++
++
++ //Optional Core technique
++ QTechnique *coreTechnique = nullptr;
++ QTechnique *gl2Technique = nullptr;
++ QString coreTechniqueName = jsonObj.value(KEY_TECHNIQUE_CORE).toString();
++ if (!coreTechniqueName.isNull()) {
++ const auto it = std::as_const(m_techniques).find(coreTechniqueName);
++ if (Q_UNLIKELY(it == m_techniques.cend())) {
++ qCWarning(GLTFIOLog, "unknown technique %ls for material %ls in GLTF file %ls",
++ qUtf16PrintableImpl(coreTechniqueName), qUtf16PrintableImpl(id), qUtf16PrintableImpl(m_basePath));
++ } else {
++ coreTechnique = it.value();
++ coreTechnique->graphicsApiFilter()->setApi(QGraphicsApiFilter::OpenGL);
++ coreTechnique->graphicsApiFilter()->setMajorVersion(3);
++ coreTechnique->graphicsApiFilter()->setMinorVersion(1);
++ coreTechnique->graphicsApiFilter()->setProfile(QGraphicsApiFilter::CoreProfile);
++ }
++ }
++ //Optional GL2 technique
++ QString gl2TechniqueName = jsonObj.value(KEY_TECHNIQUE_GL2).toString();
++ if (!gl2TechniqueName.isNull()) {
++ const auto it = std::as_const(m_techniques).find(gl2TechniqueName);
++ if (Q_UNLIKELY(it == m_techniques.cend())) {
++ qCWarning(GLTFIOLog, "unknown technique %ls for material %ls in GLTF file %ls",
++ qUtf16PrintableImpl(gl2TechniqueName), qUtf16PrintableImpl(id), qUtf16PrintableImpl(m_basePath));
++ } else {
++ gl2Technique = it.value();
++ gl2Technique->graphicsApiFilter()->setApi(QGraphicsApiFilter::OpenGL);
++ gl2Technique->graphicsApiFilter()->setMajorVersion(2);
++ gl2Technique->graphicsApiFilter()->setMinorVersion(0);
++ gl2Technique->graphicsApiFilter()->setProfile(QGraphicsApiFilter::NoProfile);
++ }
++ }
++
++
++ // glTF doesn't deal in effects, but we need a trivial one to wrap
++ // up our techniques
++ // However we need to create a unique effect for each material instead
++ // of caching because QMaterial does not keep up with effects
++ // its not the parent of.
++ QEffect* effect = new QEffect;
++ effect->setObjectName(techniqueName);
++ effect->addTechnique(technique);
++ if (coreTechnique != nullptr)
++ effect->addTechnique(coreTechnique);
++ if (gl2Technique != nullptr)
++ effect->addTechnique(gl2Technique);
++
++ QMaterial* mat = new QMaterial;
++ mat->setEffect(effect);
++
++ renameFromJson(jsonObj, mat);
++
++ const QJsonObject values = jsonObj.value(KEY_VALUES).toObject();
++ for (auto it = values.begin(), end = values.end(); it != end; ++it) {
++ const QString vName = it.key();
++ QParameter *param = parameterFromTechnique(technique, vName);
++
++ if (param == nullptr && coreTechnique != nullptr) {
++ param = parameterFromTechnique(coreTechnique, vName);
++ }
++
++ if (param == nullptr && gl2Technique != nullptr) {
++ param = parameterFromTechnique(gl2Technique, vName);
++ }
++
++ if (Q_UNLIKELY(!param)) {
++ qCWarning(GLTFIOLog, "unknown parameter: %ls in technique %ls processing material %ls",
++ qUtf16PrintableImpl(vName), qUtf16PrintableImpl(techniqueName), qUtf16PrintableImpl(id));
++ continue;
++ }
++
++ ParameterData paramData = m_parameterDataDict.value(param);
++ QVariant var = parameterValueFromJSON(paramData.type, it.value());
++
++ mat->addParameter(new QParameter(param->name(), var));
++ } // of material technique-instance values iteration
++
++ return mat;
++ }
++
++ static inline QVariant vec4ToRgb(const QVariant &vec4Var)
++ {
++ const QVector4D v = vec4Var.value<QVector4D>();
++ return QVariant(QColor::fromRgbF(v.x(), v.y(), v.z()));
++ }
++
++ QMaterial *GLTFIO::commonMaterial(const QJsonObject &jsonObj)
++ {
++ QVariantHash params;
++ bool hasDiffuseMap = false;
++ bool hasSpecularMap = false;
++ bool hasNormalMap = false;
++
++ const QJsonObject values = jsonObj.value(KEY_VALUES).toObject();
++ for (auto it = values.begin(), end = values.end(); it != end; ++it) {
++ const QString vName = it.key();
++ const QJsonValue val = it.value();
++ QVariant var;
++ QString propertyName = vName;
++ if (vName == QLatin1String("ambient") && val.isArray()) {
++ var = vec4ToRgb(parameterValueFromJSON(GL_FLOAT_VEC4, val));
++ } else if (vName == QLatin1String("diffuse")) {
++ if (val.isString()) {
++ var = parameterValueFromJSON(GL_SAMPLER_2D, val);
++ hasDiffuseMap = true;
++ } else if (val.isArray()) {
++ var = vec4ToRgb(parameterValueFromJSON(GL_FLOAT_VEC4, val));
++ }
++ } else if (vName == QLatin1String("specular")) {
++ if (val.isString()) {
++ var = parameterValueFromJSON(GL_SAMPLER_2D, val);
++ hasSpecularMap = true;
++ } else if (val.isArray()) {
++ var = vec4ToRgb(parameterValueFromJSON(GL_FLOAT_VEC4, val));
++ }
++ } else if (vName == QLatin1String("shininess") && val.isDouble()) {
++ var = parameterValueFromJSON(GL_FLOAT, val);
++ } else if (vName == QLatin1String("normalmap") && val.isString()) {
++ var = parameterValueFromJSON(GL_SAMPLER_2D, val);
++ propertyName = QStringLiteral("normal");
++ hasNormalMap = true;
++ } else if (vName == QLatin1String("transparency")) {
++ qCWarning(GLTFIOLog, "Semi-transparent common materials are not currently supported, ignoring alpha");
++ }
++ if (var.isValid())
++ params[propertyName] = var;
++ }
++
++ QMaterial *mat = nullptr;
++ if (hasNormalMap) {
++ if (hasSpecularMap) {
++ mat = new QNormalDiffuseSpecularMapMaterial;
++ } else {
++ if (Q_UNLIKELY(!hasDiffuseMap))
++ qCWarning(GLTFIOLog, "Common material with normal and specular maps needs a diffuse map as well");
++ else
++ mat = new QNormalDiffuseMapMaterial;
++ }
++ } else {
++ if (hasSpecularMap) {
++ if (Q_UNLIKELY(!hasDiffuseMap))
++ qCWarning(GLTFIOLog, "Common material with specular map needs a diffuse map as well");
++ else
++ mat = new QDiffuseSpecularMapMaterial;
++ } else if (hasDiffuseMap) {
++ mat = new QDiffuseMapMaterial;
++ } else {
++ mat = new QPhongMaterial;
++ }
++ }
++
++ if (Q_UNLIKELY(!mat)) {
++ qCWarning(GLTFIOLog, "Could not find a suitable built-in material for KHR_materials_common");
++ } else {
++ for (QVariantHash::const_iterator it = params.constBegin(), itEnd = params.constEnd(); it != itEnd; ++it)
++ mat->setProperty(it.key().toUtf8(), it.value());
++ }
++
++ return mat;
++ }
++
++ QMaterial* GLTFIO::material(const QString &id)
++ {
++ const auto it = std::as_const(m_materialCache).find(id);
++ if (it != m_materialCache.cend())
++ return it.value();
++
++ QJsonObject mats = m_json.object().value(KEY_MATERIALS).toObject();
++ const auto jsonVal = mats.value(id);
++ if (Q_UNLIKELY(jsonVal.isUndefined())) {
++ qCWarning(GLTFIOLog, "unknown material %ls in GLTF file %ls",
++ qUtf16PrintableImpl(id), qUtf16PrintableImpl(m_basePath));
++ return NULL;
++ }
++
++ const QJsonObject jsonObj = jsonVal.toObject();
++
++ QMaterial *mat = nullptr;
++
++ // Prefer common materials over custom shaders.
++ const auto extensionMat = jsonObj.value(KEY_EXTENSIONS).toObject().value(KEY_COMMON_MAT);
++ if (!extensionMat.isUndefined())
++ mat = commonMaterial(extensionMat.toObject());
++
++ if (!mat)
++ mat = materialWithCustomShader(id, jsonObj);
++
++ m_materialCache[id] = mat;
++ return mat;
++ }
++
++ QCameraLens* GLTFIO::camera(const QString &id) const
++ {
++ const auto jsonVal = m_json.object().value(KEY_CAMERAS).toObject().value(id);
++ if (Q_UNLIKELY(jsonVal.isUndefined())) {
++ qCWarning(GLTFIOLog, "unknown camera %ls in GLTF file %ls",
++ qUtf16PrintableImpl(id), qUtf16PrintableImpl(m_basePath));
++ return nullptr;
++ }
++
++ QJsonObject jsonObj = jsonVal.toObject();
++ QString camTy = jsonObj.value(KEY_TYPE).toString();
++
++ if (camTy == QLatin1String("perspective")) {
++ const auto pVal = jsonObj.value(KEY_PERSPECTIVE);
++ if (Q_UNLIKELY(pVal.isUndefined())) {
++ qCWarning(GLTFIOLog, "camera: %ls missing 'perspective' object",
++ qUtf16PrintableImpl(id));
++ return nullptr;
++ }
++
++ const QJsonObject pObj = pVal.toObject();
++ double aspectRatio = pObj.value(KEY_ASPECT_RATIO).toDouble();
++ double yfov = pObj.value(KEY_YFOV).toDouble();
++ double frustumNear = pObj.value(KEY_ZNEAR).toDouble();
++ double frustumFar = pObj.value(KEY_ZFAR).toDouble();
++
++ QCameraLens* result = new QCameraLens;
++ result->setPerspectiveProjection(yfov, aspectRatio, frustumNear, frustumFar);
++ return result;
++ } else if (camTy == QLatin1String("orthographic")) {
++ qCWarning(GLTFIOLog, "implement me");
++
++ return nullptr;
++ } else {
++ qCWarning(GLTFIOLog, "camera: %ls has unsupported type: %ls",
++ qUtf16PrintableImpl(id), qUtf16PrintableImpl(camTy));
++ return nullptr;
++ }
++ }
++
++
++ void GLTFIO::parse()
++ {
++ if (m_parseDone)
++ return;
++
++ const QJsonObject buffers = m_json.object().value(KEY_BUFFERS).toObject();
++ for (auto it = buffers.begin(), end = buffers.end(); it != end; ++it)
++ processJSONBuffer(it.key(), it.value().toObject());
++
++ const QJsonObject views = m_json.object().value(KEY_BUFFER_VIEWS).toObject();
++ loadBufferData();
++ for (auto it = views.begin(), end = views.end(); it != end; ++it)
++ processJSONBufferView(it.key(), it.value().toObject());
++ unloadBufferData();
++
++ const QJsonObject shaders = m_json.object().value(KEY_SHADERS).toObject();
++ for (auto it = shaders.begin(), end = shaders.end(); it != end; ++it)
++ processJSONShader(it.key(), it.value().toObject());
++
++ const QJsonObject programs = m_json.object().value(KEY_PROGRAMS).toObject();
++ for (auto it = programs.begin(), end = programs.end(); it != end; ++it)
++ processJSONProgram(it.key(), it.value().toObject());
++
++ const QJsonObject techniques = m_json.object().value(KEY_TECHNIQUES).toObject();
++ for (auto it = techniques.begin(), end = techniques.end(); it != end; ++it)
++ processJSONTechnique(it.key(), it.value().toObject());
++
++ const QJsonObject attrs = m_json.object().value(KEY_ACCESSORS).toObject();
++ for (auto it = attrs.begin(), end = attrs.end(); it != end; ++it)
++ processJSONAccessor(it.key(), it.value().toObject());
++
++ const QJsonObject meshes = m_json.object().value(KEY_MESHES).toObject();
++ for (auto it = meshes.begin(), end = meshes.end(); it != end; ++it)
++ processJSONMesh(it.key(), it.value().toObject());
++
++ const QJsonObject images = m_json.object().value(KEY_IMAGES).toObject();
++ for (auto it = images.begin(), end = images.end(); it != end; ++it)
++ processJSONImage(it.key(), it.value().toObject());
++
++ const QJsonObject textures = m_json.object().value(KEY_TEXTURES).toObject();
++ for (auto it = textures.begin(), end = textures.end(); it != end; ++it)
++ processJSONTexture(it.key(), it.value().toObject());
++
++ m_defaultScene = m_json.object().value(KEY_SCENE).toString();
++ m_parseDone = true;
++ }
++
++ namespace {
++ template <typename C>
++ void delete_if_without_parent(const C &c)
++ {
++ for (const auto *e : c) {
++ if (!e->parent())
++ delete e;
++ }
++ }
++ } // unnamed namespace
++
++ void GLTFIO::cleanup()
++ {
++ m_meshDict.clear();
++ m_meshMaterialDict.clear();
++ m_accessorDict.clear();
++ delete_if_without_parent(m_materialCache);
++ m_materialCache.clear();
++ m_bufferDatas.clear();
++ m_buffers.clear();
++ m_shaderPaths.clear();
++ delete_if_without_parent(m_programs);
++ m_programs.clear();
++ delete_if_without_parent(m_techniques);
++ m_techniques.clear();
++ delete_if_without_parent(m_textures);
++ m_textures.clear();
++ m_imagePaths.clear();
++ m_defaultScene.clear();
++ m_parameterDataDict.clear();
++ }
++
++ void GLTFIO::processJSONBuffer(const QString &id, const QJsonObject& json)
++ {
++ // simply cache buffers for lookup by buffer-views
++ m_bufferDatas[id] = BufferData(json);
++ }
++
++ void GLTFIO::processJSONBufferView(const QString &id, const QJsonObject& json)
++ {
++ QString bufName = json.value(KEY_BUFFER).toString();
++ const auto it = std::as_const(m_bufferDatas).find(bufName);
++ if (Q_UNLIKELY(it == m_bufferDatas.cend())) {
++ qCWarning(GLTFIOLog, "unknown buffer: %ls processing view: %ls",
++ qUtf16PrintableImpl(bufName), qUtf16PrintableImpl(id));
++ return;
++ }
++ const auto &bufferData = *it;
++
++ int target = json.value(KEY_TARGET).toInt();
++ Qt3DRender::QBuffer::BufferType ty(Qt3DRender::QBuffer::VertexBuffer);
++
++ switch (target) {
++ case GL_ARRAY_BUFFER: ty = Qt3DRender::QBuffer::VertexBuffer; break;
++ case GL_ELEMENT_ARRAY_BUFFER: ty = Qt3DRender::QBuffer::IndexBuffer; break;
++ default:
++ qCWarning(GLTFIOLog, "buffer %ls unsupported target: %d",
++ qUtf16PrintableImpl(id), target);
++ return;
++ }
++
++ quint64 offset = 0;
++ const auto byteOffset = json.value(KEY_BYTE_OFFSET);
++ if (!byteOffset.isUndefined()) {
++ offset = byteOffset.toInt();
++ qCDebug(GLTFIOLog, "bv: %ls has offset: %lld", qUtf16PrintableImpl(id), offset);
++ }
++
++ quint64 len = json.value(KEY_BYTE_LENGTH).toInt();
++
++ QByteArray bytes = bufferData.data->mid(offset, len);
++ if (Q_UNLIKELY(bytes.size() != qsizetype(len))) {
++ qCWarning(GLTFIOLog, "failed to read sufficient bytes from: %ls for view %ls",
++ qUtf16PrintableImpl(bufferData.path), qUtf16PrintableImpl(id));
++ }
++
++ Qt3DRender::QBuffer *b(new Qt3DRender::QBuffer(ty));
++ b->setData(bytes);
++ m_buffers[id] = b;
++ }
++
++ void GLTFIO::processJSONShader(const QString &id, const QJsonObject &jsonObject)
++ {
++ // shaders are trivial for the moment, defer the real work
++ // to the program section
++ QString path = jsonObject.value(KEY_URI).toString();
++
++ QFileInfo info(m_basePath, path);
++ if (Q_UNLIKELY(!info.exists())) {
++ qCWarning(GLTFIOLog, "can't find shader %ls from path %ls",
++ qUtf16PrintableImpl(id), qUtf16PrintableImpl(path));
++ return;
++ }
++
++ m_shaderPaths[id] = info.absoluteFilePath();
++ }
++
++ void GLTFIO::processJSONProgram(const QString &id, const QJsonObject &jsonObject)
++ {
++ QString fragName = jsonObject.value(KEY_FRAGMENT_SHADER).toString(),
++ vertName = jsonObject.value(KEY_VERTEX_SHADER).toString();
++ const auto fragIt = std::as_const(m_shaderPaths).find(fragName),
++ vertIt = std::as_const(m_shaderPaths).find(vertName);
++ if (Q_UNLIKELY(fragIt == m_shaderPaths.cend() || vertIt == m_shaderPaths.cend())) {
++ qCWarning(GLTFIOLog, "program: %ls missing shader: %ls %ls",
++ qUtf16PrintableImpl(id), qUtf16PrintableImpl(fragName), qUtf16PrintableImpl(vertName));
++ return;
++ }
++
++ QShaderProgram* prog = new QShaderProgram;
++ prog->setObjectName(id);
++ prog->setFragmentShaderCode(QShaderProgram::loadSource(QUrl::fromLocalFile(fragIt.value())));
++ prog->setVertexShaderCode(QShaderProgram::loadSource(QUrl::fromLocalFile(vertIt.value())));
++ m_programs[id] = prog;
++ }
++
++ void GLTFIO::processJSONTechnique(const QString &id, const QJsonObject &jsonObject )
++ {
++ QTechnique *t = new QTechnique;
++ t->setObjectName(id);
++
++ // Parameters
++ QHash<QString, QParameter*> paramDict;
++ const QJsonObject params = jsonObject.value(KEY_PARAMETERS).toObject();
++ for (auto it = params.begin(), end = params.end(); it != end; ++it) {
++ const QString pname = it.key();
++ const QJsonObject po = it.value().toObject();
++
++ //QString semantic = po.value(KEY_SEMANTIC).toString();
++ QParameter *p = new QParameter(t);
++ p->setName(pname);
++ m_parameterDataDict.insert(p, ParameterData(po));
++
++ //If the parameter has default value, set it
++ QJsonValue value = po.value(KEY_VALUE);
++ if (!value.isUndefined()) {
++ int dataType = po.value(KEY_TYPE).toInt();
++ p->setValue(parameterValueFromJSON(dataType, value));
++ }
++
++ t->addParameter(p);
++
++ paramDict[pname] = p;
++ } // of parameters iteration
++
++ // Program
++ QRenderPass* pass = new QRenderPass;
++ QString programName = jsonObject.value(KEY_PROGRAM).toString();
++ const auto progIt = std::as_const(m_programs).find(programName);
++ if (Q_UNLIKELY(progIt == m_programs.cend())) {
++ qCWarning(GLTFIOLog, "technique %ls: missing program %ls",
++ qUtf16PrintableImpl(id), qUtf16PrintableImpl(programName));
++ } else {
++ pass->setShaderProgram(progIt.value());
++ }
++
++ // Attributes
++ const QJsonObject attrs = jsonObject.value(KEY_ATTRIBUTES).toObject();
++ for (auto it = attrs.begin(), end = attrs.end(); it != end; ++it) {
++ QString pname = it.value().toString();
++ QParameter *parameter = paramDict.value(pname, nullptr);
++ QString attributeName = pname;
++ if (Q_UNLIKELY(!parameter)) {
++ qCWarning(GLTFIOLog, "attribute %ls defined in instanceProgram but not as parameter",
++ qUtf16PrintableImpl(pname));
++ continue;
++ }
++ //Check if the parameter has a standard attribute semantic
++ const auto paramDataIt = m_parameterDataDict.find(parameter);
++ QString standardAttributeName = standardAttributeNameFromSemantic(paramDataIt->semantic);
++ if (!standardAttributeName.isNull()) {
++ attributeName = standardAttributeName;
++ t->removeParameter(parameter);
++ m_parameterDataDict.erase(paramDataIt);
++ delete parameter;
++ }
++
++ } // of program-instance attributes
++
++ // Uniforms
++ const QJsonObject uniforms = jsonObject.value(KEY_UNIFORMS).toObject();
++ for (auto it = uniforms.begin(), end = uniforms.end(); it != end; ++it) {
++ const QString pname = it.value().toString();
++ QParameter *parameter = paramDict.value(pname, nullptr);
++ if (Q_UNLIKELY(!parameter)) {
++ qCWarning(GLTFIOLog, "uniform %ls defined in instanceProgram but not as parameter",
++ qUtf16PrintableImpl(pname));
++ continue;
++ }
++ //Check if the parameter has a standard uniform semantic
++ const auto paramDataIt = m_parameterDataDict.find(parameter);
++ if (hasStandardUniformNameFromSemantic(paramDataIt->semantic)) {
++ t->removeParameter(parameter);
++ m_parameterDataDict.erase(paramDataIt);
++ delete parameter;
++ }
++ } // of program-instance uniforms
++
++
++ // States
++ QJsonObject states = jsonObject.value(KEY_STATES).toObject();
++
++ //Process states to enable
++ const QJsonArray enableStatesArray = states.value(KEY_ENABLE).toArray();
++ QList<int> enableStates;
++ for (const QJsonValue &enableValue : enableStatesArray)
++ enableStates.append(enableValue.toInt());
++
++ //Process the list of state functions
++ const QJsonObject functions = states.value(KEY_FUNCTIONS).toObject();
++ for (auto it = functions.begin(), end = functions.end(); it != end; ++it) {
++ int enableStateType = 0;
++ QRenderState *renderState = buildState(it.key(), it.value(), enableStateType);
++ if (renderState != nullptr) {
++ //Remove the need to set a default state values for enableStateType
++ enableStates.removeOne(enableStateType);
++ pass->addRenderState(renderState);
++ }
++ }
++
++ //Create render states with default values for any remaining enable states
++ for (int enableState : std::as_const(enableStates)) {
++ QRenderState *renderState = buildStateEnable(enableState);
++ if (renderState != nullptr)
++ pass->addRenderState(renderState);
++ }
++
++
++ t->addRenderPass(pass);
++
++ m_techniques[id] = t;
++ }
++
++ void GLTFIO::processJSONAccessor( const QString &id, const QJsonObject& json )
++ {
++ m_accessorDict[id] = AccessorData(json);
++ }
++
++ void GLTFIO::processJSONMesh(const QString &id, const QJsonObject &json)
++ {
++ const QJsonArray primitivesArray = json.value(KEY_PRIMITIVES).toArray();
++ for (const QJsonValue &primitiveValue : primitivesArray) {
++ QJsonObject primitiveObject = primitiveValue.toObject();
++ int type = primitiveObject.value(KEY_MODE).toInt();
++ QString material = primitiveObject.value(KEY_MATERIAL).toString();
++
++ if (Q_UNLIKELY(material.isEmpty())) {
++ qCWarning(GLTFIOLog, "malformed primitive on %ls, missing material value %ls",
++ qUtf16PrintableImpl(id), qUtf16PrintableImpl(material));
++ continue;
++ }
++
++ QGeometryRenderer *geometryRenderer = new QGeometryRenderer;
++ QGeometry *meshGeometry = new QGeometry(geometryRenderer);
++
++ //Set Primitive Type
++ geometryRenderer->setPrimitiveType(static_cast<QGeometryRenderer::PrimitiveType>(type));
++
++ //Save Material for mesh
++ m_meshMaterialDict[geometryRenderer] = material;
++
++ const QJsonObject attrs = primitiveObject.value(KEY_ATTRIBUTES).toObject();
++ for (auto it = attrs.begin(), end = attrs.end(); it != end; ++it) {
++ QString k = it.value().toString();
++ const auto accessorIt = std::as_const(m_accessorDict).find(k);
++ if (Q_UNLIKELY(accessorIt == m_accessorDict.cend())) {
++ qCWarning(GLTFIOLog, "unknown attribute accessor: %ls on mesh %ls",
++ qUtf16PrintableImpl(k), qUtf16PrintableImpl(id));
++ continue;
++ }
++
++ const QString attrName = it.key();
++ QString attributeName = standardAttributeNameFromSemantic(attrName);
++ if (attributeName.isEmpty())
++ attributeName = attrName;
++
++ //Get buffer handle for accessor
++ Qt3DRender::QBuffer *buffer = m_buffers.value(accessorIt->bufferViewName, nullptr);
++ if (Q_UNLIKELY(!buffer)) {
++ qCWarning(GLTFIOLog, "unknown buffer-view: %ls processing accessor: %ls",
++ qUtf16PrintableImpl(accessorIt->bufferViewName), qUtf16PrintableImpl(id));
++ continue;
++ }
++
++ QAttribute *attribute = new QAttribute(buffer,
++ attributeName,
++ accessorIt->type,
++ accessorIt->dataSize,
++ accessorIt->count,
++ accessorIt->offset,
++ accessorIt->stride);
++ attribute->setAttributeType(QAttribute::VertexAttribute);
++ meshGeometry->addAttribute(attribute);
++ }
++
++ const auto indices = primitiveObject.value(KEY_INDICES);
++ if (!indices.isUndefined()) {
++ QString k = indices.toString();
++ const auto accessorIt = std::as_const(m_accessorDict).find(k);
++ if (Q_UNLIKELY(accessorIt == m_accessorDict.cend())) {
++ qCWarning(GLTFIOLog, "unknown index accessor: %ls on mesh %ls",
++ qUtf16PrintableImpl(k), qUtf16PrintableImpl(id));
++ } else {
++ //Get buffer handle for accessor
++ Qt3DRender::QBuffer *buffer = m_buffers.value(accessorIt->bufferViewName, nullptr);
++ if (Q_UNLIKELY(!buffer)) {
++ qCWarning(GLTFIOLog, "unknown buffer-view: %ls processing accessor: %ls",
++ qUtf16PrintableImpl(accessorIt->bufferViewName), qUtf16PrintableImpl(id));
++ continue;
++ }
++
++ QAttribute *attribute = new QAttribute(buffer,
++ accessorIt->type,
++ accessorIt->dataSize,
++ accessorIt->count,
++ accessorIt->offset,
++ accessorIt->stride);
++ attribute->setAttributeType(QAttribute::IndexAttribute);
++ meshGeometry->addAttribute(attribute);
++ }
++ } // of has indices
++
++ geometryRenderer->setGeometry(meshGeometry);
++
++ m_meshDict.insert( id, geometryRenderer);
++ } // of primitives iteration
++ }
++
++ void GLTFIO::processJSONImage(const QString &id, const QJsonObject &jsonObject)
++ {
++ QString path = jsonObject.value(KEY_URI).toString();
++ QFileInfo info(m_basePath, path);
++ if (Q_UNLIKELY(!info.exists())) {
++ qCWarning(GLTFIOLog, "can't find image %ls from path %ls",
++ qUtf16PrintableImpl(id), qUtf16PrintableImpl(path));
++ return;
++ }
++
++ m_imagePaths[id] = info.absoluteFilePath();
++ }
++
++ void GLTFIO::processJSONTexture(const QString &id, const QJsonObject &jsonObject)
++ {
++ int target = jsonObject.value(KEY_TARGET).toInt(GL_TEXTURE_2D);
++ //TODO: support other targets that GL_TEXTURE_2D (though the spec doesn't support anything else)
++ if (Q_UNLIKELY(target != GL_TEXTURE_2D)) {
++ qCWarning(GLTFIOLog, "unsupported texture target: %d", target);
++ return;
++ }
++
++ QTextureLoader* tex = new QTextureLoader;
++ tex->setMirrored(false);
++
++ QString samplerId = jsonObject.value(KEY_SAMPLER).toString();
++ QString source = jsonObject.value(KEY_SOURCE).toString();
++ const auto imagIt = std::as_const(m_imagePaths).find(source);
++ if (Q_UNLIKELY(imagIt == m_imagePaths.cend())) {
++ qCWarning(GLTFIOLog, "texture %ls references missing image %ls",
++ qUtf16PrintableImpl(id), qUtf16PrintableImpl(source));
++ return;
++ }
++
++ tex->setSource(QUrl::fromLocalFile(imagIt.value()));
++
++ const auto samplersDictValue = m_json.object().value(KEY_SAMPLERS).toObject().value(samplerId);
++ if (Q_UNLIKELY(samplersDictValue.isUndefined())) {
++ qCWarning(GLTFIOLog, "texture %ls references unknown sampler %ls",
++ qUtf16PrintableImpl(id), qUtf16PrintableImpl(samplerId));
++ return;
++ }
++
++ QJsonObject sampler = samplersDictValue.toObject();
++
++ tex->setWrapMode(QTextureWrapMode(static_cast<QTextureWrapMode::WrapMode>(sampler.value(KEY_WRAP_S).toInt())));
++ tex->setMinificationFilter(static_cast<QAbstractTexture::Filter>(sampler.value(KEY_MIN_FILTER).toInt()));
++ if (tex->minificationFilter() == QAbstractTexture::NearestMipMapLinear ||
++ tex->minificationFilter() == QAbstractTexture::LinearMipMapNearest ||
++ tex->minificationFilter() == QAbstractTexture::NearestMipMapNearest ||
++ tex->minificationFilter() == QAbstractTexture::LinearMipMapLinear) {
++
++ tex->setGenerateMipMaps(true);
++ }
++ tex->setMagnificationFilter(static_cast<QAbstractTexture::Filter>(sampler.value(KEY_MAG_FILTER).toInt()));
++
++ m_textures[id] = tex;
++ }
++
++ void GLTFIO::loadBufferData()
++ {
++ for (auto &bufferData : m_bufferDatas) {
++ if (!bufferData.data) {
++ bufferData.data = new QByteArray(resolveLocalData(bufferData.path));
++ }
++ }
++ }
++
++ void GLTFIO::unloadBufferData()
++ {
++ for (const auto &bufferData : std::as_const(m_bufferDatas)) {
++ QByteArray *data = bufferData.data;
++ delete data;
++ }
++ }
++
++ QByteArray GLTFIO::resolveLocalData(const QString &path) const
++ {
++ QDir d(m_basePath);
++ Q_ASSERT(d.exists());
++
++ QString absPath = d.absoluteFilePath(path);
++ QFile f(absPath);
++ f.open(QIODevice::ReadOnly);
++ return f.readAll();
++ }
++
++ QVariant GLTFIO::parameterValueFromJSON(int type, const QJsonValue &value) const
++ {
++ if (value.isBool()) {
++ if (type == GL_BOOL)
++ return QVariant(static_cast<GLboolean>(value.toBool()));
++ } else if (value.isString()) {
++ if (type == GL_SAMPLER_2D) {
++ //Textures are special because we need to do a lookup to return the
++ //QAbstractTexture
++ QString textureId = value.toString();
++ const auto it = m_textures.find(textureId);
++ if (Q_UNLIKELY(it == m_textures.end())) {
++ qCWarning(GLTFIOLog, "unknown texture %ls", qUtf16PrintableImpl(textureId));
++ return QVariant();
++ } else {
++ return QVariant::fromValue(it.value());
++ }
++ }
++ } else if (value.isDouble()) {
++ switch (type) {
++ case GL_BYTE:
++ return QVariant(static_cast<GLbyte>(value.toInt()));
++ case GL_UNSIGNED_BYTE:
++ return QVariant(static_cast<GLubyte>(value.toInt()));
++ case GL_SHORT:
++ return QVariant(static_cast<GLshort>(value.toInt()));
++ case GL_UNSIGNED_SHORT:
++ return QVariant(static_cast<GLushort>(value.toInt()));
++ case GL_INT:
++ return QVariant(static_cast<GLint>(value.toInt()));
++ case GL_UNSIGNED_INT:
++ return QVariant(static_cast<GLuint>(value.toInt()));
++ case GL_FLOAT:
++ return QVariant(static_cast<GLfloat>(value.toDouble()));
++ }
++ } else if (value.isArray()) {
++
++ const QJsonArray valueArray = value.toArray();
++
++ QVector2D vector2D;
++ QVector3D vector3D;
++ QVector4D vector4D;
++ QList<float> dataMat2(4, 0.0f);
++ QList<float> dataMat3(9, 0.0f);
++
++ switch (type) {
++ case GL_BYTE:
++ return QVariant(static_cast<GLbyte>(valueArray.first().toInt()));
++ case GL_UNSIGNED_BYTE:
++ return QVariant(static_cast<GLubyte>(valueArray.first().toInt()));
++ case GL_SHORT:
++ return QVariant(static_cast<GLshort>(valueArray.first().toInt()));
++ case GL_UNSIGNED_SHORT:
++ return QVariant(static_cast<GLushort>(valueArray.first().toInt()));
++ case GL_INT:
++ return QVariant(static_cast<GLint>(valueArray.first().toInt()));
++ case GL_UNSIGNED_INT:
++ return QVariant(static_cast<GLuint>(valueArray.first().toInt()));
++ case GL_FLOAT:
++ return QVariant(static_cast<GLfloat>(valueArray.first().toDouble()));
++ case GL_FLOAT_VEC2:
++ vector2D.setX(static_cast<GLfloat>(valueArray.at(0).toDouble()));
++ vector2D.setY(static_cast<GLfloat>(valueArray.at(1).toDouble()));
++ return QVariant(vector2D);
++ case GL_FLOAT_VEC3:
++ vector3D.setX(static_cast<GLfloat>(valueArray.at(0).toDouble()));
++ vector3D.setY(static_cast<GLfloat>(valueArray.at(1).toDouble()));
++ vector3D.setZ(static_cast<GLfloat>(valueArray.at(2).toDouble()));
++ return QVariant(vector3D);
++ case GL_FLOAT_VEC4:
++ vector4D.setX(static_cast<GLfloat>(valueArray.at(0).toDouble()));
++ vector4D.setY(static_cast<GLfloat>(valueArray.at(1).toDouble()));
++ vector4D.setZ(static_cast<GLfloat>(valueArray.at(2).toDouble()));
++ vector4D.setW(static_cast<GLfloat>(valueArray.at(3).toDouble()));
++ return QVariant(vector4D);
++ case GL_INT_VEC2:
++ vector2D.setX(static_cast<GLint>(valueArray.at(0).toInt()));
++ vector2D.setY(static_cast<GLint>(valueArray.at(1).toInt()));
++ return QVariant(vector2D);
++ case GL_INT_VEC3:
++ vector3D.setX(static_cast<GLint>(valueArray.at(0).toInt()));
++ vector3D.setY(static_cast<GLint>(valueArray.at(1).toInt()));
++ vector3D.setZ(static_cast<GLint>(valueArray.at(2).toInt()));
++ return QVariant(vector3D);
++ case GL_INT_VEC4:
++ vector4D.setX(static_cast<GLint>(valueArray.at(0).toInt()));
++ vector4D.setY(static_cast<GLint>(valueArray.at(1).toInt()));
++ vector4D.setZ(static_cast<GLint>(valueArray.at(2).toInt()));
++ vector4D.setW(static_cast<GLint>(valueArray.at(3).toInt()));
++ return QVariant(vector4D);
++ case GL_BOOL:
++ return QVariant(static_cast<GLboolean>(valueArray.first().toBool()));
++ case GL_BOOL_VEC2:
++ vector2D.setX(static_cast<GLboolean>(valueArray.at(0).toBool()));
++ vector2D.setY(static_cast<GLboolean>(valueArray.at(1).toBool()));
++ return QVariant(vector2D);
++ case GL_BOOL_VEC3:
++ vector3D.setX(static_cast<GLboolean>(valueArray.at(0).toBool()));
++ vector3D.setY(static_cast<GLboolean>(valueArray.at(1).toBool()));
++ vector3D.setZ(static_cast<GLboolean>(valueArray.at(2).toBool()));
++ return QVariant(vector3D);
++ case GL_BOOL_VEC4:
++ vector4D.setX(static_cast<GLboolean>(valueArray.at(0).toBool()));
++ vector4D.setY(static_cast<GLboolean>(valueArray.at(1).toBool()));
++ vector4D.setZ(static_cast<GLboolean>(valueArray.at(2).toBool()));
++ vector4D.setW(static_cast<GLboolean>(valueArray.at(3).toBool()));
++ return QVariant(vector4D);
++ case GL_FLOAT_MAT2:
++ //Matrix2x2 is in Row Major ordering (so we need to convert)
++ dataMat2[0] = static_cast<GLfloat>(valueArray.at(0).toDouble());
++ dataMat2[1] = static_cast<GLfloat>(valueArray.at(2).toDouble());
++ dataMat2[2] = static_cast<GLfloat>(valueArray.at(1).toDouble());
++ dataMat2[3] = static_cast<GLfloat>(valueArray.at(3).toDouble());
++ return QVariant::fromValue(QMatrix2x2(dataMat2.constData()));
++ case GL_FLOAT_MAT3:
++ //Matrix3x3 is in Row Major ordering (so we need to convert)
++ dataMat3[0] = static_cast<GLfloat>(valueArray.at(0).toDouble());
++ dataMat3[1] = static_cast<GLfloat>(valueArray.at(3).toDouble());
++ dataMat3[2] = static_cast<GLfloat>(valueArray.at(6).toDouble());
++ dataMat3[3] = static_cast<GLfloat>(valueArray.at(1).toDouble());
++ dataMat3[4] = static_cast<GLfloat>(valueArray.at(4).toDouble());
++ dataMat3[5] = static_cast<GLfloat>(valueArray.at(7).toDouble());
++ dataMat3[6] = static_cast<GLfloat>(valueArray.at(2).toDouble());
++ dataMat3[7] = static_cast<GLfloat>(valueArray.at(5).toDouble());
++ dataMat3[8] = static_cast<GLfloat>(valueArray.at(8).toDouble());
++ return QVariant::fromValue(QMatrix3x3(dataMat3.constData()));
++ case GL_FLOAT_MAT4:
++ //Matrix4x4 is Column Major ordering
++ return QVariant(QMatrix4x4(static_cast<GLfloat>(valueArray.at(0).toDouble()),
++ static_cast<GLfloat>(valueArray.at(1).toDouble()),
++ static_cast<GLfloat>(valueArray.at(2).toDouble()),
++ static_cast<GLfloat>(valueArray.at(3).toDouble()),
++ static_cast<GLfloat>(valueArray.at(4).toDouble()),
++ static_cast<GLfloat>(valueArray.at(5).toDouble()),
++ static_cast<GLfloat>(valueArray.at(6).toDouble()),
++ static_cast<GLfloat>(valueArray.at(7).toDouble()),
++ static_cast<GLfloat>(valueArray.at(8).toDouble()),
++ static_cast<GLfloat>(valueArray.at(9).toDouble()),
++ static_cast<GLfloat>(valueArray.at(10).toDouble()),
++ static_cast<GLfloat>(valueArray.at(11).toDouble()),
++ static_cast<GLfloat>(valueArray.at(12).toDouble()),
++ static_cast<GLfloat>(valueArray.at(13).toDouble()),
++ static_cast<GLfloat>(valueArray.at(14).toDouble()),
++ static_cast<GLfloat>(valueArray.at(15).toDouble())));
++ case GL_SAMPLER_2D:
++ return QVariant(valueArray.at(0).toString());
++ }
++ }
++ return QVariant();
++ }
++
++ QAttribute::VertexBaseType GLTFIO::accessorTypeFromJSON(int componentType)
++ {
++ if (componentType == GL_BYTE) {
++ return QAttribute::Byte;
++ } else if (componentType == GL_UNSIGNED_BYTE) {
++ return QAttribute::UnsignedByte;
++ } else if (componentType == GL_SHORT) {
++ return QAttribute::Short;
++ } else if (componentType == GL_UNSIGNED_SHORT) {
++ return QAttribute::UnsignedShort;
++ } else if (componentType == GL_UNSIGNED_INT) {
++ return QAttribute::UnsignedInt;
++ } else if (componentType == GL_FLOAT) {
++ return QAttribute::Float;
++ }
++
++ //There shouldn't be an invalid case here
++ qCWarning(GLTFIOLog, "unsupported accessor type %d", componentType);
++ return QAttribute::Float;
++ }
++
++ uint GLTFIO::accessorDataSizeFromJson(const QString &type)
++ {
++ QString typeName = type.toUpper();
++ if (typeName == QLatin1String("SCALAR"))
++ return 1;
++ if (typeName == QLatin1String("VEC2"))
++ return 2;
++ if (typeName == QLatin1String("VEC3"))
++ return 3;
++ if (typeName == QLatin1String("VEC4"))
++ return 4;
++ if (typeName == QLatin1String("MAT2"))
++ return 4;
++ if (typeName == QLatin1String("MAT3"))
++ return 9;
++ if (typeName == QLatin1String("MAT4"))
++ return 16;
++
++ return 0;
++ }
++
++ QRenderState *GLTFIO::buildStateEnable(int state)
++ {
++ int type = 0;
++ //By calling buildState with QJsonValue(), a Render State with
++ //default values is created.
++
++ if (state == GL_BLEND) {
++ //It doesn't make sense to handle this state alone
++ return nullptr;
++ }
++
++ if (state == GL_CULL_FACE) {
++ return buildState(QStringLiteral("cullFace"), QJsonValue(), type);
++ }
++
++ if (state == GL_DEPTH_TEST) {
++ return buildState(QStringLiteral("depthFunc"), QJsonValue(), type);
++ }
++
++ if (state == GL_POLYGON_OFFSET_FILL) {
++ return buildState(QStringLiteral("polygonOffset"), QJsonValue(), type);
++ }
++
++ if (state == GL_SAMPLE_ALPHA_TO_COVERAGE) {
++ return new QAlphaCoverage();
++ }
++
++ if (state == GL_SCISSOR_TEST) {
++ return buildState(QStringLiteral("scissor"), QJsonValue(), type);
++ }
++
++ qCWarning(GLTFIOLog, "unsupported render state: %d", state);
++
++ return nullptr;
++ }
++
++ QRenderState* GLTFIO::buildState(const QString& functionName, const QJsonValue &value, int &type)
++ {
++ type = -1;
++ QJsonArray values = value.toArray();
++
++ if (functionName == QLatin1String("blendColor")) {
++ type = GL_BLEND;
++ //TODO: support render state blendColor
++ qCWarning(GLTFIOLog, "unsupported render state: %ls", qUtf16PrintableImpl(functionName));
++ return nullptr;
++ }
++
++ if (functionName == QLatin1String("blendEquationSeparate")) {
++ type = GL_BLEND;
++ //TODO: support settings blendEquation alpha
++ QBlendEquation *blendEquation = new QBlendEquation;
++ blendEquation->setBlendFunction((QBlendEquation::BlendFunction)values.at(0).toInt(GL_FUNC_ADD));
++ return blendEquation;
++ }
++
++ if (functionName == QLatin1String("blendFuncSeparate")) {
++ type = GL_BLEND;
++ QBlendEquationArguments *blendArgs = new QBlendEquationArguments;
++ blendArgs->setSourceRgb((QBlendEquationArguments::Blending)values.at(0).toInt(GL_ONE));
++ blendArgs->setSourceAlpha((QBlendEquationArguments::Blending)values.at(1).toInt(GL_ONE));
++ blendArgs->setDestinationRgb((QBlendEquationArguments::Blending)values.at(2).toInt(GL_ZERO));
++ blendArgs->setDestinationAlpha((QBlendEquationArguments::Blending)values.at(3).toInt(GL_ZERO));
++ return blendArgs;
++ }
++
++ if (functionName == QLatin1String("colorMask")) {
++ QColorMask *colorMask = new QColorMask;
++ colorMask->setRedMasked(values.at(0).toBool(true));
++ colorMask->setGreenMasked(values.at(1).toBool(true));
++ colorMask->setBlueMasked(values.at(2).toBool(true));
++ colorMask->setAlphaMasked(values.at(3).toBool(true));
++ return colorMask;
++ }
++
++ if (functionName == QLatin1String("cullFace")) {
++ type = GL_CULL_FACE;
++ QCullFace *cullFace = new QCullFace;
++ cullFace->setMode((QCullFace::CullingMode)values.at(0).toInt(GL_BACK));
++ return cullFace;
++ }
++
++ if (functionName == QLatin1String("depthFunc")) {
++ type = GL_DEPTH_TEST;
++ QDepthTest *depthTest = new QDepthTest;
++ depthTest->setDepthFunction((QDepthTest::DepthFunction)values.at(0).toInt(GL_LESS));
++ return depthTest;
++ }
++
++ if (functionName == QLatin1String("depthMask")) {
++ if (!values.at(0).toBool(true)) {
++ QNoDepthMask *depthMask = new QNoDepthMask;
++ return depthMask;
++ }
++ return nullptr;
++ }
++
++ if (functionName == QLatin1String("depthRange")) {
++ //TODO: support render state depthRange
++ qCWarning(GLTFIOLog, "unsupported render state: %ls", qUtf16PrintableImpl(functionName));
++ return nullptr;
++ }
++
++ if (functionName == QLatin1String("frontFace")) {
++ QFrontFace *frontFace = new QFrontFace;
++ frontFace->setDirection((QFrontFace::WindingDirection)values.at(0).toInt(GL_CCW));
++ return frontFace;
++ }
++
++ if (functionName == QLatin1String("lineWidth")) {
++ //TODO: support render state lineWidth
++ qCWarning(GLTFIOLog, "unsupported render state: %ls", qUtf16PrintableImpl(functionName));
++ return nullptr;
++ }
++
++ if (functionName == QLatin1String("polygonOffset")) {
++ type = GL_POLYGON_OFFSET_FILL;
++ QPolygonOffset *polygonOffset = new QPolygonOffset;
++ polygonOffset->setScaleFactor((float)values.at(0).toDouble(0.0f));
++ polygonOffset->setDepthSteps((float)values.at(1).toDouble(0.0f));
++ return polygonOffset;
++ }
++
++ if (functionName == QLatin1String("scissor")) {
++ type = GL_SCISSOR_TEST;
++ QScissorTest *scissorTest = new QScissorTest;
++ scissorTest->setLeft(values.at(0).toDouble(0.0f));
++ scissorTest->setBottom(values.at(1).toDouble(0.0f));
++ scissorTest->setWidth(values.at(2).toDouble(0.0f));
++ scissorTest->setHeight(values.at(3).toDouble(0.0f));
++ return scissorTest;
++ }
++
++ qCWarning(GLTFIOLog, "unsupported render state: %ls", qUtf16PrintableImpl(functionName));
++ return nullptr;
++ }
++
++ } // namespace Qt3DRender
++
++ QT_END_NAMESPACE
++
++ #include "moc_gltfio.cpp"