AffineTransform at = new AffineTransform(positionTransform);
at.concatenate(viewingTransform);
at = at.createInverse(); // clip in user space
clip = at.createTransformedShape(clip);
Filter filter = cgn.getGraphicsNodeRable(true);
cgn.setClip(new ClipRable8Bit(filter, clip));
} catch (NoninvertibleTransformException ex) {}
}
// 'enable-background'
Rectangle2D r = CSSUtilities.convertEnableBackground(e);