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main.cpp Example File
^{opengl/pbuffers2/main.cpp}

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 ** This file is part of the example classes 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
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 #include <QtGui/QApplication>
 #include <QtGui/QMessageBox>
 #include "glwidget.h"

 int main(int argc, char **argv)
 {
     QApplication a(argc, argv);
     if (!QGLFormat::hasOpenGL() || !QGLPixelBuffer::hasOpenGLPbuffers()) {
         QMessageBox::information(0, "OpenGL pbuffers 2",
                                  "This system does not support OpenGL/pbuffers.");
         return -1;
     }

     GLWidget widget(0);
     widget.resize(640, 480);
     widget.show();
     return a.exec();
 }