Using PDFPath methods to draw image

I am trying to draw an image using the PdfPath methods. I am setting my fill color and the add the path to the fill path, but it is not drawing anything on the page. How am i suppose to use this function in order to draw a page specific image?

if u mean output an image in a path, then using clip op first and then show image.
if u mean fill a path with color, set color first and then fill path.
after all finished, u shall invoke Page.AddContent to attach contents to page.
and then using PDFView.vRenderSync PDFReader.invalidate to display.