DiaShape functions for X11 rendering

ArtSVP*     dia_shape_x_update              (DiaShape *shape,
                                             DiaCanvasViewItem *item,
                                             double *affine,
                                             ArtSVP *clip_path,
                                             int flags);

void        dia_shape_x_render              (DiaShape *shape,
                                             DiaCanvasViewItem *item,
                                             GdkDrawable *drawable,
                                             int x,
                                             int y,
                                             int width,
                                             int height);

PangoLayout* dia_shape_x_new_pango_layout   (void);