Function png_filters::fallbacks::recon_up

pub fn recon_up(filtered_row: &mut [u8], previous_row: &[u8])

Recon(x) = Filt(x) + Recon(b)

This function doesn’t specialize on the bytes per pixel like most others do, since it doesn’t use the leftward pixel data.

This function does not have a “top” variant. There’s no effect when doing a wrapping add of 0.

Panic

• debug_assert_eq!(filtered_row.len(), previous_row.len());