main.cpp

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#include <private/qgraphicssystemplugin_p.h>
#include <private/qgraphicssystem_gl_p.h>
#include <qgl.h>

QT_BEGIN_NAMESPACE

class QGLGraphicsSystemPlugin : public QGraphicsSystemPlugin
{
public:
    QStringList keys() const;
    QGraphicsSystem *create(const QString&);
};

QStringList QGLGraphicsSystemPlugin::keys() const
{
    QStringList list;
    list << QLatin1String("OpenGL") << QLatin1String("OpenGL1");
#if !defined(QT_OPENGL_ES_1)
    list << QLatin1String("OpenGL2");
#endif
#if defined(Q_WS_X11) && !defined(QT_NO_EGL)
    list << QLatin1String("X11GL");
#endif
    return list;
}

QGraphicsSystem* QGLGraphicsSystemPlugin::create(const QString& system)
{
    if (system.toLower() == QLatin1String("opengl1")) {
        QGL::setPreferredPaintEngine(QPaintEngine::OpenGL);
        return new QGLGraphicsSystem(false);
    }

#if !defined(QT_OPENGL_ES_1)
    if (system.toLower() == QLatin1String("opengl2")) {
        QGL::setPreferredPaintEngine(QPaintEngine::OpenGL2);
        return new QGLGraphicsSystem(false);
    }
#endif

#if defined(Q_WS_X11) && !defined(QT_NO_EGL)
    if (system.toLower() == QLatin1String("x11gl"))
        return new QGLGraphicsSystem(true);
#endif

    if (system.toLower() == QLatin1String("opengl"))
        return new QGLGraphicsSystem(false);

    return 0;
}

Q_EXPORT_PLUGIN2(opengl, QGLGraphicsSystemPlugin)

QT_END_NAMESPACE