Function layout_2013::display_list::background::placement

pub fn placement(
    bg: &Background,
    viewport_size: Size2D<Au>,
    absolute_bounds: Rect<Au>,
    intrinsic_size: Option<Size2D<Au>>,
    border: SideOffsets2D<Au>,
    border_padding: SideOffsets2D<Au>,
    border_radii: BorderRadius,
    index: usize,
) -> Option<BackgroundPlacement>

Determines where to place an element background image or gradient.

Images have their resolution as intrinsic size while gradients have no intrinsic size.

Return None if the background size is zero, otherwise a BackgroundPlacement.