berrypod/node_modules/pngjs/lib/paeth-predictor.js
jamey 9528700862 rename project from SimpleshopTheme to Berrypod
All modules, configs, paths, and references updated.
836 tests pass, zero warnings.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-02-18 21:23:15 +00:00

17 lines
372 B
JavaScript

"use strict";
module.exports = function paethPredictor(left, above, upLeft) {
let paeth = left + above - upLeft;
let pLeft = Math.abs(paeth - left);
let pAbove = Math.abs(paeth - above);
let pUpLeft = Math.abs(paeth - upLeft);
if (pLeft <= pAbove && pLeft <= pUpLeft) {
return left;
}
if (pAbove <= pUpLeft) {
return above;
}
return upLeft;
};