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Make sure correct bKGD is retained

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Andrew 2022-11-28 18:50:04 +13:00
parent 181c6dd96f
commit 37161bf05d
1 changed files with 7 additions and 0 deletions
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7
src/reduction/mod.rs
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@ -76,6 +76,13 @@ pub fn reduced_palette(png: &PngImage) -> Option<PngImage> {
color_val(a.0).cmp(&color_val(b.0)) color_val(a.0).cmp(&color_val(b.0))
}); });
// Make sure the background is also included, but only after sorting since it may not be used in idat
if let Some(&idx) = png.aux_headers.get(b"bKGD").and_then(|b| b.first()) {
if !used[idx as usize] {
used_enumerated.push((idx as usize, &true));
}
}
let mut next_index = 0_u16; let mut next_index = 0_u16;
let mut seen = IndexMap::with_capacity(palette.len()); let mut seen = IndexMap::with_capacity(palette.len());
for (i, used) in used_enumerated.iter().cloned() { for (i, used) in used_enumerated.iter().cloned() {