$global['$github.com/oov/psd$'] = {
    decodePackBitsLines: function(buf, lines, large) {
        var r = new Uint32Array(lines);
        var lens = new DataView(buf.buffer);
        if (large) {
            for (var i = 0; i < lines; ++i) {
                r[i] = lens.getUint32(i << 2, false);
            }
        } else {
            for (var i = 0; i < lines; ++i) {
                r[i] = lens.getUint16(i << 1, false);
            }
        }
        return r;
    },
    decodePackBits: function(dest, buf, lens) {
        var ofs = 0,
            d = 0;
        for (var i = 0; i < lens.length; ++i) {
            for (var j = 0, ln = lens[i]; j < ln;) {
                if (buf[ofs] <= 0x7f) {
                    var l = buf[ofs++] + 1;
                    if (dest.length < d+l || ln-j-1 < l) {
                        return false;
                    }
                    for (var k = 0; k < l; ++k) {
                        dest[d++] = buf[ofs++];
                    }
                    j += l + 1;
                    continue;
                }
                if (buf[ofs] == 0x80) {
                    ofs++;
                    continue;
                }
                var l = 256 - buf[ofs++] + 1;
                if (dest.length < d+l || j+1 >= ln) {
                    return false;
                }
                for (var k = 0, c = buf[ofs++]; k < l; ++k) {
                    dest[d++] = c;
                }
                j += 2;
            }
        }
        return true;
    }
}