/**
  * Convert an AWT Shape to an SWT Path.
  *
  * @param shape
  * @return the SWT Path or <code>null</code> if <code>shape == null</code>
  */
 private Path convertToPath(Shape shape) {
   if (shape == null) {
     return null;
   }
   Path path = new Path(_gc.getDevice());
   PathIterator iter = shape.getPathIterator(null);
   float[] coords = new float[6];
   while (!iter.isDone()) {
     int op = iter.currentSegment(coords);
     switch (op) {
       case PathIterator.SEG_MOVETO:
         path.moveTo(coords[0], coords[1]);
         break;
       case PathIterator.SEG_LINETO:
         path.lineTo(coords[0], coords[1]);
         break;
       case PathIterator.SEG_QUADTO:
         path.quadTo(coords[0], coords[1], coords[2], coords[3]);
         break;
       case PathIterator.SEG_CUBICTO:
         path.cubicTo(coords[0], coords[1], coords[2], coords[3], coords[4], coords[5]);
         break;
       case PathIterator.SEG_CLOSE:
         path.close();
         break;
     }
     iter.next();
   }
   return path;
 }
 public void setClip(Shape s) {
   Path path = convertToPath(s);
   if (path == null) {
     _gc.setClipping((Rectangle) null);
   } else {
     _gc.setClipping(path);
   }
   if (_clippingPath != null) {
     _clippingPath.dispose();
   }
   _clippingPath = path;
   _clippingArea = (s == null ? null : new Area(s));
 }
 /** Clean used resources. */
 public void clean() {
   if (_clippingPath != null) {
     _gc.setClipping((Rectangle) null);
     _clippingPath.dispose();
     _clippingPath = null;
     _clippingArea = null;
   }
   if (_color != null) {
     _color.dispose();
     _color = null;
   }
   if (_transform != null) {
     _gc.setTransform(null);
     _transform.dispose();
   }
 }
 public void fill(Shape s) {
   Path p = convertToPath(s);
   _gc.fillPath(p);
   p.dispose();
 }