Display Images in Qt-supported Formats
  
  This example displays images which are in any format
  supported by Qt.  Combining this with the Qt ImageIO
  Extension adds PNG image support to your browser.
  It demonstrates the use of the QNPInstance::streamAsFile()
  function.
  
  To build the example, you must first build the
  Qt Netscape Plugin Extension library.
  Then type make in extensions/nsplugin/examples/qtimage/
  and copy the resulting qtimage.so or npqtimage.dll
  to the Plugins directory of your WWW browser.
  
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This plugin supports transparency and scaling of the image, just like
GIFs in most WWW browsers.