title: Gaussian blur cutoff at edges
body: <p>I am working on an svg export utility for a drawing program on android. I am having a problem that the behind blur is cutoff past the shape boundaries - looks like i need to resize the viewBox or increase the margin or something. Does anyone know the best way?</p>
  
  <p>The test file url is <a href="http://www.robmunro.net/misc/test.svg" rel="noreferrer">here</a> - it downloads as the mime type isn't setup correctly on the server and I cant restart it at the moment :(. There are embedded images and fonts in the file, Which is why it's big. But if you save it to disk you can open in chrome, ff, etc...</p>
  
  <p>An enlarged example of this problem is given. Notice the square edges on the orange glow.</p>
  
  <p><img src="https://i.stack.imgur.com/Z1UWx.png"/></p>