title: Image resizing algorithm
body: <p>I want to write a function to downsize an image to fit specified bounds. For example i want to resize a 2000x2333 image to fit into 1280x800. The aspect ratio must be maintained. I've come up with the following algorithm:</p>
  
  <pre><code>NSSize mysize = [self pixelSize]; // just to get the size of the original image
  int neww, newh = 0;
  float thumbratio = width / height; // width and height are maximum thumbnail's bounds
  float imgratio = mysize.width / mysize.height;
  
  if (imgratio &gt; thumbratio)
  {
      float scale = mysize.width / width;
      newh = round(mysize.height / scale);
      neww = width;
  }
  else
  {
      float scale = mysize.height / height;
      neww = round(mysize.width / scale);
      newh = height;
  }
  </code></pre>
  
  <p>And it seemed to work. Well ... seemed. But then i tried to resize a 1280x1024 image to a 1280x800 bounds and it gave me a result of 1280x1024 (which obviously doesn't fit in 1280x800). </p>
  
  <p>Does anybody have any ideas how this algorithm should work?</p>