\item{splash_obj}{Object created by a call to \url{splash}}
\item{file_path}{Absolute path to a filename on the local host. \strong{This only works with a locally running Splash instance started with \url{start_splash}.}}
\item{output}{either \code{html} or \code{png} to get the page content or an image capture}
\item{viewport}{View width and height (in pixels) of the browser viewport to render the web page. Format is "\code{<width>x<height>}". e.g. 800x600. Default value is 1024x768.}