A bug in NGRegion makes it so that the following code has the wrong resize behavior. The image is being stretched, but should always maintain the correct aspect ratio.


        Region r = new Region();
        r.setStyle("-fx-background-image: url(\"https://www.devoxx.com/plugins/servlet/builder/resource/DEVOXX2012/bg.jpg?1339672736848\");" +
                   "-fx-background-size: cover;");


The bug is due to the code that computes how to draw in NGRegion.