/****************************************************************************
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** This file is part of the QtGui module of the Qt Toolkit.
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** this package.
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** ensure the GNU Lesser General Public License version 2.1 requirements
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****************************************************************************/

#include "qgraphicssystemfactory_p.h"
#include "qgraphicssystemplugin_p.h"
#include "private/qfactoryloader_p.h"
#include "qmutex.h"

#include "qapplication.h"
#include "qgraphicssystem_raster_p.h"
#include "qdebug.h"

QT_BEGIN_NAMESPACE

#if !defined(QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS)
Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, loader,
    (QGraphicsSystemFactoryInterface_iid, QLatin1String("/graphicssystems"), Qt::CaseInsensitive))
#endif

QGraphicsSystem *QGraphicsSystemFactory::create(const QString& key)
{
    QGraphicsSystem *ret = 0;
    QString system = key.toLower();

#if defined (QT_GRAPHICSSYSTEM_OPENGL)
    if (system.isEmpty()) {
        system = QLatin1String("opengl");
    }
#elif defined (QT_GRAPHICSSYSTEM_OPENVG)
    if (system.isEmpty()) {
        system = QLatin1String("openvg");
    }
#elif defined (QT_GRAPHICSSYSTEM_RASTER) && !defined(Q_WS_WIN) && !defined(Q_OS_SYMBIAN)
    if (system.isEmpty()) {
        system = QLatin1String("raster");
    }
#endif

    if (system == QLatin1String("raster"))
        return new QRasterGraphicsSystem;
    else if (system.isEmpty() || system == QLatin1String("native"))
        return 0;

#if !defined(QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS)
    if (!ret) {
        if (QGraphicsSystemFactoryInterface *factory = qobject_cast<QGraphicsSystemFactoryInterface*>(loader()->instance(system)))
            ret = factory->create(system);
    }
#endif

    if (!ret)
        qWarning() << "Unable to load graphicssystem" << system;

    return ret;
}

/*!
    Returns the list of valid keys, i.e. the keys this factory can
    create styles for.

    \sa create()
*/
QStringList QGraphicsSystemFactory::keys()
{
#if !defined(QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS)
    QStringList list = loader()->keys();
#else
    QStringList list;
#endif
    if (!list.contains(QLatin1String("Raster")))
        list << QLatin1String("raster");
    return list;
}

QT_END_NAMESPACE