pub(crate) fn reduce(
source: &Path,
share: u64,
advised: u32,
out: &Path,
) -> Option<(u32, u8, u64)>Expand description
A picture made fit for its share: written to out as fit says, from
source; its long side, its quality and its size. None: it cannot be
made small enough, or is no picture Qt reads here.