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wip retooling some bits

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better handling of reserved color
This commit is contained in:
Brooke Vibber 2023-03-24 13:11:56 -07:00
parent 37b06789b0
commit 0c8ca1380d
1 changed files with 17 additions and 2 deletions
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19
dither-image.js
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@ -617,8 +617,23 @@ function decimate(input, palette, n) {
); );
}); });
let topRanges = ranges.map((rgb) => Math.max(rgb.r, rgb.g, rgb.b)); let topRanges = ranges.map((rgb) => Math.max(rgb.r, rgb.g, rgb.b));
let greatest = Math.max(...topRanges); //let greatest = Math.max(...topRanges);
let index = topRanges.indexOf(greatest); //let index = topRanges.indexOf(greatest);
let greatest = 0;
let index = -1;
for (let i = 0; i < topRanges.length; i++) {
if (topRanges[i] >= greatest) {
greatest = topRanges[i];
index = i;
}
}
if (index == -1) {
// We just ran out of colors! Pad the buckets.
while (buckets.length < n) {
buckets.push([new RGB(0, 0, 0)]);
}
break;
}
let [lo, hi] = medianCut(buckets[index], ranges[index]); let [lo, hi] = medianCut(buckets[index], ranges[index]);
buckets.splice(index, 1, lo, hi); buckets.splice(index, 1, lo, hi);
} }