the GtkIconSource specifying the icon to render
a text direction
a state
(type int) the size to render the icon at. A size of (GtkIconSize)-1 means render at the size of the source and don't scale.
the widget. [allow-none]
a style detail. [allow-none]
a newly-created GdkPixbuf containing the rendered icon. [transfer full]
Renders the icon specified by source at the given size according to the given parameters and returns the result in a pixbuf.