first commit

2026-09-08 20:28:54 +08:00
commit 2ada8d3d5a
37380 changed files with 4886169 additions and 0 deletions
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+'use strict';
+
+module.exports = function paethPredictor(left, above, upLeft) {
+
+  var paeth = left + above - upLeft;
+  var pLeft = Math.abs(paeth - left);
+  var pAbove = Math.abs(paeth - above);
+  var pUpLeft = Math.abs(paeth - upLeft);
+
+  if (pLeft <= pAbove && pLeft <= pUpLeft) {
+    return left;
+  }
+  if (pAbove <= pUpLeft) {
+    return above;
+  }
+  return upLeft;
+};