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main.cpp Example File
^{opengl/samplebuffers/main.cpp}

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    ** Copyright (C) 2005-2006 Trolltech AS. All rights reserved.
    **
    ** This file is part of the documentation of the Qt Toolkit.
    **
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    ** License version 2.0 as published by the Free Software Foundation
    ** and appearing in the file LICENSE.GPL included in the packaging of
    ** this file.  Please review the following information to ensure GNU
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    #include <QtGui/QApplication>
    #include <QtGui/QMessageBox>
    #include "glwidget.h"

    int main(int argc, char **argv)
    {
        QApplication a(argc, argv);

        QGLFormat f = QGLFormat::defaultFormat();
        f.setSampleBuffers(true);
        QGLFormat::setDefaultFormat(f);
        if (!QGLFormat::hasOpenGL()) {
            QMessageBox::information(0, "OpenGL samplebuffers",
                                     "This system does not support OpenGL.",
                                     QMessageBox::Ok);
            return 0;
        }

        GLWidget widget(0);

        if (!widget.format().sampleBuffers()) {
            QMessageBox::information(0, "OpenGL samplebuffers",
                                     "This system does not have sample buffer support.",
                                     QMessageBox::Ok);
            return 0;
        }

        widget.resize(640, 480);
        widget.show();

        return a.exec();
    }