src/modules/filters.js
function (buffer1, buffer2) {
    var combinedBuffer = new Uint8Array(buffer1.byteLength + buffer2.byteLength);
    combinedBuffer.set(new Uint8Array(buffer1), 0);
    combinedBuffer.set(new Uint8Array(buffer2), buffer1.byteLength);
    return combinedBuffer;
  }
function (buffer1, buffer2) {
    var combinedBuffer = new Uint8Array(buffer1.byteLength + buffer2.byteLength);
    combinedBuffer.set(new Uint8Array(buffer1), 0);
    combinedBuffer.set(new Uint8Array(buffer2), buffer1.byteLength);
    return combinedBuffer;
  }
/*
var FlatePredictors = {
None: 1,
TIFF: 2,
PNG_None: 10,
PNG_Sub: 11,
PNG_Up: 12,
PNG_Average: 13,
PNG_Paeth: 14,
PNG_Optimum: 15
};