How to position the background image on the canvas. One of the following symbols:

:scaled

Scale the image to the canvas width and height.

:tiled

Tile the image across the canvas.

:fit

Scale the image to fit within the canvas while retaining the image proportions. Center the image on the canvas. Color any part of the canvas not covered by the image with the background color.

Source Code

# File rvg/rvg.rb, line 163
def background_position=(pos)
    warn "background_position= has no effect in nested RVG objects" if @nested
    bg_pos = pos.to_s.downcase
    if ! ['scaled', 'tiled', 'fit'].include?(bg_pos)
        raise ArgumentError, "background position must be `scaled', `tiled', or `fit' (#{pos} given)"
    end
    @background_position = bg_pos.to_sym
end