Rendering the contents of a QGLWidget into a high resolution image

Hello, 

My vewier renders models in a QGLWidget. what I want is to render the
current contents of the QGLWidget into a high resolution image and
save it to disk. I tried this by rendering into a QPixmap as follows:


QGLWidget *drawArea = m_QGLViewer->getDrawArea();
   QPixmap pix = drawArea->renderPixmap ( 1000, 1000, false );
   QImage img = pix.convertToImage();


   QFileDialog mQFileDialog;
   mQFileDialog.setMode(QFileDialog::AnyFile);
   QString s = mQFileDialog.getSaveFileName( "d:/", "Images (*.bmp);;
*.*", this ) ;
    if ( !s.isEmpty() ) {
       const char  *fName = s.latin1();
       if (fName != 0) 
          img.save(fName,"BMP",100);       
   }



m_QGLViewer is my viewer.
m_QGLViewer->getDrawArea() returns the QGLQidget where rendering occurs.


UNFORTUNATELY, I am getting only a white image!!! could anybody
perhapse guess what the error is? Does any body habe a better idea to
achieve the goal?


Many thanks,
yein
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-- 
Author: Zein Salah
  INET: [email protected]

Fat City Hosting, San Diego, California -- http://www.fatcity.com
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