vendor/khanamiryan/qrcode-detector-decoder/lib/qrcode/decoder/BitMatrixParser.php

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<?php
/*
 * Copyright 2007 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

namespace Zxing\Qrcode\Decoder;

use Zxing\FormatException;
use Zxing\Common\BitMatrix;

/**
 * @author Sean Owen
 */
final class BitMatrixParser {

    private $bitMatrix;
    private $parsedVersion;
    private $parsedFormatInfo;
    private $mirror;

    /**
     * @param bitMatrix {@link BitMatrix} to parse
     * @throws FormatException if dimension is not >= 21 and 1 mod 4
     */
    function __construct($bitMatrix) {
        $dimension = $bitMatrix->getHeight();
        if ($dimension < 21 || ($dimension & 0x03) != 1) {
            throw FormatException::getFormatInstance();
        }
        $this->bitMatrix = $bitMatrix;
    }

    /**
     * <p>Reads format information from one of its two locations within the QR Code.</p>
     *
     * @return {@link FormatInformation} encapsulating the QR Code's format info
     * @throws FormatException if both format information locations cannot be parsed as
     * the valid encoding of format information
     */
    function readFormatInformation() {

        if ($this->parsedFormatInfo != null) {
            return $this->parsedFormatInfo;
        }

        // Read top-left format info bits
        $formatInfoBits1 = 0;
        for ($i = 0; $i < 6; $i++) {