Type: method
prints an image.w and h are the width and height of the image. At least one of these parameters must be specified. If the other parameter is not specified, it will be calculated to keep the image's aspect ratio.
x and y to specify an absolute position of the top left corner of the image. (0,0) is the lower left corner of the page. If x or y or both are missing, the image gets inserted at the current text cursor position (more precisely the top left corner of the charbox)
dx and dy are optional distances to be added to x and y.