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Also sort when reducing to palette

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This commit is contained in:
Felix Hanau 2019-07-22 13:30:27 +01:00
parent b302ae4246
commit d240c612f1
1 changed files with 8 additions and 0 deletions
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8
src/reduction/mod.rs
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@ -226,6 +226,14 @@ pub fn reduce_color_type(png: &PngImage) -> Option<PngImage> {
}
}
//Make sure that palette gets sorted. Ideally, this should be done within reduced_color_to_palette.
if should_reduce_bit_depth && reduced.ihdr.color_type == ColorType::Indexed {
if let Some(r) = reduced_palette(&reduced) {
reduced = Cow::Owned(r);
should_reduce_bit_depth = true;
}
}
if should_reduce_bit_depth {
// Some conversions will allow us to perform bit depth reduction that
// wasn't possible before