title: save an image as a bitmap without losing quality
body: <p>I had a problem of printing quality and I described it in this link :
  <a href="https://stackoverflow.com/questions/11644115/how-to-improve-printed-text-quality-after-using-graphics-drawstring">enter link description here</a></p>
  
  <p>I tried many different solutions that helped other guys with similar prob but they don't work for me because I have a new prob of saving image as bitmap(with low quality) </p>
  
  <p>finally I decided to ask my current question , because as u see in above link , my prob starts after saving the image in system(96dpi) and restoring it . but I have no way so I'm looking for a way that make it possible to save an image (that has pixels drawn from a graphic) without losing quality.</p>
  
  <p>thanx in advance</p>