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Make filter, zlib level and strategy deterministic (#179)

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Felix Hanau 2019-06-27 15:05:35 +01:00 committed by Josh Holmer
parent 5b5aeaa683
commit c09e8f6d12
1 changed files with 2 additions and 2 deletions
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4
src/lib.rs
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@ -446,7 +446,7 @@ pub fn optimize_from_memory(data: &[u8], opts: &Options) -> PngResult<Vec<u8>> {
}
}
#[derive(Debug, PartialEq, Clone, Copy)]
#[derive(Debug, PartialEq, PartialOrd, Clone, Copy)]
/// Defines options to be used for a single compression trial
struct TrialOptions {
pub filter: u8,
@ -636,7 +636,7 @@ fn optimize_png(
}
});
let best: Option<TrialWithData> =
best.reduce_with(|i, j| if i.1.len() <= j.1.len() { i } else { j });
best.reduce_with(|i, j| if i.1.len() < j.1.len() || (i.1.len() == j.1.len() && i.0 < j.0) { i } else { j });
if let Some(better) = best {
png.idat_data = better.1;