Function imageproc::integralimage::row_running_sum

pub fn row_running_sum(
    image: &GrayImage, 
    row: u32, 
    buffer: &mut [u32], 
    padding: u32
)

Computes the running sum of one row of image, padded at the beginning and end. The padding is by continuity. Takes a reference to buffer so that this can be reused for all rows in an image.