graphical ->draw_image: image,
x=int, y=int, sx=[int], sy=[int], sw=[int], sh=[int], transparent=[bool]Draw a bitmap or pixmap image. The image is drawn from X,Y. SX,SY,SW,SH
define the source-area on the image. The default area is the entire image
object. If the image is monochrome, (image<-kind),
the on pixels are painted in the current foreground and the
off pixels in the current background. If transparent is @on,
the off pixels are not painted.
This method is part of the user-defined graphics infra-structure
described with graphical->_redraw_area
and should not be called outside this context.
