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(0.00126935368114843 * Y -
              0.00265090189010898 * k +
              0.25802910206845) +
          k * (-0.000318913117588328 * k - 0.213742400323665);
        data[offset++] =
          -20.810012546947 +
          Cb *
            (-0.000570115196973677 * Cb -
              2.63409051004589e-5 * Cr +
              0.0020741088115012 * Y -
              0.00288260236853442 * k +
              0.814272968359295) +
          Cr *
            (-1.53496057440975e-5 * Cr -
              0.000132689043961446 * Y +
              0.000560833691242812 * k -
              0.195152027534049) +
          Y *
            (0.00174418132927582 * Y -
              0.00255243321439347 * k +
              0.116935020465145) +
          k * (-0.000343531996510555 * k + 0.24165260232407);
      }
      
      return data.subarray(0, offset);
    },
    _convertYcckToCmyk: function convertYcckToCmyk(data) {
      var Y, Cb, Cr;
      for (var i = 0, length = data.length; i < length; i += 4) {
        Y = data[i];