vendor/khanamiryan/qrcode-detector-decoder/lib/qrcode/detector/AlignmentPatternFinder.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\Detector;

use Zxing\NotFoundException;
use Zxing\ResultPointCallback;
use Zxing\Common\BitMatrix;


/**
 * <p>This class attempts to find alignment patterns in a QR Code. Alignment patterns look like finder
 * patterns but are smaller and appear at regular intervals throughout the image.</p>
 *
 * <p>At the moment this only looks for the bottom-right alignment pattern.</p>
 *
 * <p>This is mostly a simplified copy of {@link FinderPatternFinder}. It is copied,
 * pasted and stripped down here for maximum performance but does unfortunately duplicate
 * some code.</p>
 *
 * <p>This class is thread-safe but not reentrant. Each thread must allocate its own object.</p>
 *
 * @author Sean Owen
 */
final class AlignmentPatternFinder {

    private $image;
    private $possibleCenters;
    private $startX;
    private $startY;
    private $width;
    private $height;
    private $moduleSize;
    private $crossCheckStateCount;
    private $resultPointCallback;

    /**
     * <p>Creates a finder that will look in a portion of the whole image.</p>
     *
     * @param image image to search
     * @param startX left column from which to start searching
     * @param startY top row from which to start searching
     * @param width width of region to search
     * @param height height of region to search
     * @param moduleSize estimated module size so far
     */