code: public static void scale(Bitmap src, Bitmap dest,
                               int x, int y, int sw, int sh,
                               int dx, int dy,
                               int dw, int dh) {
          scale(src, dest, CLEAR_COLOR, x, y, sw, sh, dx, dy, dw, dh);
      }
docs: Scaling region of bitmap to destination bitmap region
  
  @param src  source bitmap
  @param dest destination bitmap
  @param x    source x
  @param y    source y
  @param sw   source width
  @param sh   source height
  @param dx   destination x
  @param dy   destination y
  @param dw   destination width
  @param dh   destination height