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Diffstat (limited to 'src/gui/util/qshadernodesloader.cpp')
| -rw-r--r-- | src/gui/util/qshadernodesloader.cpp | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/src/gui/util/qshadernodesloader.cpp b/src/gui/util/qshadernodesloader.cpp new file mode 100644 index 0000000000..db34b6d44d --- /dev/null +++ b/src/gui/util/qshadernodesloader.cpp @@ -0,0 +1,274 @@ +/**************************************************************************** +** +** Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB). +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtGui module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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 + +QShaderNodesLoader::QShaderNodesLoader() Q_DECL_NOTHROW + : m_status(Null), + m_device(nullptr) +{ +} + +QShaderNodesLoader::Status QShaderNodesLoader::status() const Q_DECL_NOTHROW +{ + return m_status; +} + +QHash<QString, QShaderNode> QShaderNodesLoader::nodes() const Q_DECL_NOTHROW +{ + return m_nodes; +} + +QIODevice *QShaderNodesLoader::device() const Q_DECL_NOTHROW +{ + return m_device; +} + +void QShaderNodesLoader::setDevice(QIODevice *device) Q_DECL_NOTHROW +{ + m_device = device; + m_nodes.clear(); + m_status = !m_device ? Null + : (m_device->openMode() & QIODevice::ReadOnly) ? Waiting + : Error; +} + +void QShaderNodesLoader::load() +{ + if (m_status == Error) + return; + + auto error = QJsonParseError(); + const auto 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 auto root = document.object(); + + bool hasError = false; + + for (const auto &property : root.keys()) { + const auto nodeValue = root.value(property); + if (!nodeValue.isObject()) { + qWarning() << "Invalid node found"; + hasError = true; + break; + } + + const auto nodeObject = nodeValue.toObject(); + + auto node = QShaderNode(); + + const auto inputsValue = nodeObject.value(QStringLiteral("inputs")); + if (inputsValue.isArray()) { + const auto inputsArray = inputsValue.toArray(); + for (const auto &inputValue : inputsArray) { + if (!inputValue.isString()) { + qWarning() << "Non-string value in inputs"; + hasError = true; + break; + } + + auto input = QShaderNodePort(); + input.direction = QShaderNodePort::Input; + input.name = inputValue.toString(); + node.addPort(input); + } + } + + const auto outputsValue = nodeObject.value(QStringLiteral("outputs")); + if (outputsValue.isArray()) { + const auto outputsArray = outputsValue.toArray(); + for (const auto &outputValue : outputsArray) { + if (!outputValue.isString()) { + qWarning() << "Non-string value in outputs"; + hasError = true; + break; + } + + auto output = QShaderNodePort(); + output.direction = QShaderNodePort::Output; + output.name = outputValue.toString(); + node.addPort(output); + } + } + + const auto parametersValue = nodeObject.value(QStringLiteral("parameters")); + if (parametersValue.isObject()) { + const auto parametersObject = parametersValue.toObject(); + for (const auto ¶meterName : parametersObject.keys()) { + const auto parameterValue = parametersObject.value(parameterName); + if (parameterValue.isObject()) { + const auto parameterObject = parameterValue.toObject(); + const auto type = parameterObject.value(QStringLiteral("type")).toString(); + const auto typeId = QMetaType::type(type.toUtf8()); + + const auto value = parameterObject.value(QStringLiteral("value")).toString(); + auto variant = QVariant(value); + + if (QMetaType::typeFlags(typeId) & QMetaType::IsEnumeration) { + const auto metaObject = QMetaType::metaObjectForType(typeId); + const auto className = metaObject->className(); + const auto enumName = type.mid(static_cast<int>(qstrlen(className)) + 2).toUtf8(); + const auto metaEnum = metaObject->enumerator(metaObject->indexOfEnumerator(enumName)); + const auto 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()); + } + } + } + + const auto rulesValue = nodeObject.value(QStringLiteral("rules")); + if (rulesValue.isArray()) { + const auto rulesArray = rulesValue.toArray(); + for (const auto &ruleValue : rulesArray) { + if (!ruleValue.isObject()) { + qWarning() << "Rules should be objects"; + hasError = true; + break; + } + + const auto ruleObject = ruleValue.toObject(); + + const auto formatValue = ruleObject.value(QStringLiteral("format")); + if (!formatValue.isObject()) { + qWarning() << "Format is mandatory in rules and should be an object"; + hasError = true; + break; + } + + const auto formatObject = formatValue.toObject(); + auto format = QShaderFormat(); + + const auto apiValue = formatObject.value(QStringLiteral("api")); + if (!apiValue.isString()) { + qWarning() << "Format API must be a string"; + hasError = true; + break; + } + + const auto api = apiValue.toString(); + format.setApi(api == QStringLiteral("OpenGLES") ? QShaderFormat::OpenGLES + : api == QStringLiteral("OpenGLNoProfile") ? QShaderFormat::OpenGLNoProfile + : api == QStringLiteral("OpenGLCoreProfile") ? QShaderFormat::OpenGLCoreProfile + : api == QStringLiteral("OpenGLCompatibilityProfile") ? QShaderFormat::OpenGLCompatibilityProfile + : QShaderFormat::NoApi); + if (format.api() == QShaderFormat::NoApi) { + qWarning() << "Format API must be one of: OpenGLES, OpenGLNoProfile, OpenGLCoreProfile or OpenGLCompatibilityProfile"; + hasError = true; + break; + } + + const auto majorValue = formatObject.value(QStringLiteral("major")); + const auto minorValue = formatObject.value(QStringLiteral("minor")); + if (!majorValue.isDouble() || !minorValue.isDouble()) { + qWarning() << "Format major and minor version must be values"; + hasError = true; + break; + } + format.setVersion(QVersionNumber(majorValue.toInt(), minorValue.toInt())); + + const auto extensionsValue = formatObject.value(QStringLiteral("extensions")); + const auto extensionsArray = extensionsValue.toArray(); + auto extensions = QStringList(); + std::transform(extensionsArray.constBegin(), extensionsArray.constEnd(), + std::back_inserter(extensions), + [] (const QJsonValue &extensionValue) { return extensionValue.toString(); }); + format.setExtensions(extensions); + + const auto vendor = formatObject.value(QStringLiteral("vendor")).toString(); + format.setVendor(vendor); + + const auto substitutionValue = ruleObject.value(QStringLiteral("substitution")); + if (!substitutionValue.isString()) { + qWarning() << "Substitution needs to be a string"; + hasError = true; + break; + } + + const auto substitution = substitutionValue.toString().toUtf8(); + + const auto snippetsValue = ruleObject.value(QStringLiteral("headerSnippets")); + const auto snippetsArray = snippetsValue.toArray(); + auto snippets = QByteArrayList(); + std::transform(snippetsArray.constBegin(), snippetsArray.constEnd(), + std::back_inserter(snippets), + [] (const QJsonValue &snippetValue) { return snippetValue.toString().toUtf8(); }); + + node.addRule(format, QShaderNode::Rule(substitution, snippets)); + } + } + + m_nodes.insert(property, node); + } + + if (hasError) { + m_status = Error; + m_nodes.clear(); + } else { + m_status = Ready; + } +} + +QT_END_NAMESPACE |