vendor/khanamiryan/qrcode-detector-decoder/lib/common/PerspectiveTransform.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\Common;

/**
 * <p>This class implements a perspective transform in two dimensions. Given four source and four
 * destination points, it will compute the transformation implied between them. The code is based
 * directly upon section 3.4.2 of George Wolberg's "Digital Image Warping"; see pages 54-56.</p>
 *
 * @author Sean Owen
 */
final class PerspectiveTransform {

    private $a11;
    private $a12;
    private $a13;
    private $a21;
    private $a22;
    private $a23;
    private $a31;
    private $a32;
    private $a33;

    private function __construct($a11, $a21, $a31,
                                          $a12, $a22, $a32,
                                          $a13, $a23, $a33) {
        $this->a11 = $a11;
        $this->a12 = $a12;
        $this->a13 = $a13;
        $this->a21 = $a21;
        $this->a22 = $a22;
        $this->a23 = $a23;
        $this->a31 = $a31;
        $this->a32 = $a32;
        $this->a33 = $a33;
    }

    public static function quadrilateralToQuadrilateral($x0, $y0,
                                                        $x1, $y1,
                                                        $x2, $y2,
                                                        $x3, $y3,
                                                        $x0p, $y0p,
                                                        $x1p, $y1p,
                                                        $x2p, $y2p,
                                                        $x3p, $y3p) {