Function render_write_eol_relative_buffer 

pub fn render_write_eol_relative_buffer(
    width: u32,
    coordinate_to_rgba: &dyn Fn(u32, u32) -> (u8, u8, u8, u8),
    write_eol: bool,
    top: u32,
    bottom: u32,
    buffer: &mut [u8],
) -> u64