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main.cpp Example File
opengl/pbuffers2/main.cpp

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 #include <QtGui/QApplication>
 #include <QtGui/QMessageBox>
 #include "glwidget.h"

 int main(int argc, char **argv)
 {
     Q_INIT_RESOURCE(pbuffers2);

     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();
 }