gtk-render-background (context cr x y width height)

context -- a gtk-style-context object
cr -- a cairo-t context
x -- a number, coerced to a double float, with the x origin of the render area
y -- a number, coerced to a double float, with the y origin of the render area
width -- a number, coerced to a double float, with the rectangle width
height -- a number, coerced to a double float, with the rectangle height

Renders the background of an element.