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vendor/khanamiryan/qrcode-detector-decoder/lib/qrcode/QRCodeReader.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;
+
+use Zxing\BarcodeFormat;
+use Zxing\BinaryBitmap;
+use Zxing\ChecksumException;
+use Zxing\DecodeHintType;
+use Zxing\FormatException;
+use Zxing\NotFoundException;
+use Zxing\Reader;
+use Zxing\Result;
+use Zxing\ResultMetadataType;
+use Zxing\ResultPoint;
+use Zxing\Common\BitMatrix;
+use Zxing\Common\DecoderResult;
+use Zxing\Common\DetectorResult;
+use Zxing\Qrcode\Decoder\Decoder;
+use Zxing\Qrcode\Decoder\QRCodeDecoderMetaData;
+use Zxing\Qrcode\Detector\Detector;
+
+
+
+/**
+ * This implementation can detect and decode QR Codes in an image.
+ *
+ * @author Sean Owen
+ */
+class QRCodeReader implements Reader {
+
+
+    private static $NO_POINTS = array();
+    private $decoder;
+
+    function __construct(){
+        $this->decoder =  new Decoder();
+
+    }
+
+    protected final function  getDecoder() {
+        return $this->decoder;
+    }
+
+    /**
+     * Locates and decodes a QR code in an image.
+     *
+     * @return a String representing the content encoded by the QR code
+     * @throws NotFoundException if a QR code cannot be found
+     * @throws FormatException if a QR code cannot be decoded
+     * @throws ChecksumException if error correction fails
+     */
+    //@Override
+
+
+    // @Override
+    public function decode($image, $hints=null){/* Map<DecodeHintType,?> hints*/
+        $decoderResult = null;
+        $points = array();
+        if ($hints != null && $hints['PURE_BARCODE']) {//hints.containsKey(DecodeHintType.PURE_BARCODE)) {
+            $bits = $this->extractPureBits($image->getBlackMatrix());
+            $decoderResult = $this->decoder->decode($bits, $hints);
+            $points = self::$NO_POINTS;
+        } else {
+            $detector = new Detector($image->getBlackMatrix());
+            $detectorResult = $detector->detect($hints);
+
+            $decoderResult = $this->decoder->decode($detectorResult->getBits(), $hints);
+            $points = $detectorResult->getPoints();
+        }
+
+        // If the code was mirrored: swap the bottom-left and the top-right points.
+        if ($decoderResult->getOther() instanceof QRCodeDecoderMetaData) {
+            $decoderResult->getOther()->applyMirroredCorrection($points);
+        }
+
+        $result = new Result($decoderResult->getText(), $decoderResult->getRawBytes(), $points, 'QR_CODE');//BarcodeFormat.QR_CODE
+        $byteSegments = $decoderResult->getByteSegments();
+        if ($byteSegments != null) {
+            $result->putMetadata('BYTE_SEGMENTS', $byteSegments);//ResultMetadataType.BYTE_SEGMENTS
+        }
+        $ecLevel = $decoderResult->getECLevel();
+        if ($ecLevel != null) {
+            $result->putMetadata('ERROR_CORRECTION_LEVEL', $ecLevel);//ResultMetadataType.ERROR_CORRECTION_LEVEL
+        }
+        if ($decoderResult->hasStructuredAppend()) {
+            $result->putMetadata('STRUCTURED_APPEND_SEQUENCE',//ResultMetadataType.STRUCTURED_APPEND_SEQUENCE
+                $decoderResult->getStructuredAppendSequenceNumber());
+            $result->putMetadata('STRUCTURED_APPEND_PARITY',//ResultMetadataType.STRUCTURED_APPEND_PARITY
+                $decoderResult->getStructuredAppendParity());
+        }
+        return $result;
+    }
+
+    //@Override
+    public function reset() {
+        // do nothing
+    }
+
+    /**
+     * This method detects a code in a "pure" image -- that is, pure monochrome image
+     * which contains only an unrotated, unskewed, image of a code, with some white border
+     * around it. This is a specialized method that works exceptionally fast in this special
+     * case.
+     *
+     * @see com.google.zxing.datamatrix.DataMatrixReader#extractPureBits(BitMatrix)
+     */
+    private static function extractPureBits($image) {
+
+        $leftTopBlack = $image->getTopLeftOnBit();
+        $rightBottomBlack = $image->getBottomRightOnBit();
+        if ($leftTopBlack == null || $rightBottomBlack == null) {
+            throw NotFoundException::getNotFoundInstance();
+        }
+
+        $moduleSize = self::moduleSize($leftTopBlack, $image);
+
+        $top = $leftTopBlack[1];
+        $bottom = $rightBottomBlack[1];
+        $left = $leftTopBlack[0];
+        $right = $rightBottomBlack[0];
+
+        // Sanity check!
+        if ($left >= $right || $top >= $bottom) {
+            throw NotFoundException::getNotFoundInstance();
+        }
+
+        if ($bottom - $top != $right - $left) {
+            // Special case, where bottom-right module wasn't black so we found something else in the last row
+            // Assume it's a square, so use height as the width
+            $right = $left + ($bottom - $top);
+        }
+
+        $matrixWidth = round(($right - $left + 1) / $moduleSize);
+        $matrixHeight = round(($bottom - $top + 1) / $moduleSize);
+        if ($matrixWidth <= 0 || $matrixHeight <= 0) {
+            throw NotFoundException::getNotFoundInstance();
+        }
+        if ($matrixHeight != $matrixWidth) {
+            // Only possibly decode square regions
+            throw NotFoundException::getNotFoundInstance();
+        }
+
+        // Push in the "border" by half the module width so that we start
+        // sampling in the middle of the module. Just in case the image is a
+        // little off, this will help recover.
+        $nudge = (int) ($moduleSize / 2.0);// $nudge = (int) ($moduleSize / 2.0f);
+        $top += $nudge;
+        $left += $nudge;
+
+        // But careful that this does not sample off the edge
+        // "right" is the farthest-right valid pixel location -- right+1 is not necessarily
+        // This is positive by how much the inner x loop below would be too large
+        $nudgedTooFarRight = $left + (int) (($matrixWidth - 1) * $moduleSize) - $right;
+        if ($nudgedTooFarRight > 0) {
+            if ($nudgedTooFarRight > $nudge) {
+                // Neither way fits; abort
+                throw NotFoundException::getNotFoundInstance();
+            }
+            $left -= $nudgedTooFarRight;
+        }
+        // See logic above
+        $nudgedTooFarDown = $top + (int) (($matrixHeight - 1) * $moduleSize) - $bottom;
+        if ($nudgedTooFarDown > 0) {
+            if ($nudgedTooFarDown > $nudge) {
+                // Neither way fits; abort
+                throw NotFoundException::getNotFoundInstance();
+            }
+            $top -= $nudgedTooFarDown;
+        }
+
+        // Now just read off the bits
+        $bits = new BitMatrix($matrixWidth, $matrixHeight);
+        for ($y = 0; $y < $matrixHeight; $y++) {
+            $iOffset = $top + (int) ($y * $moduleSize);
+            for ($x = 0; $x < $matrixWidth; $x++) {
+                if ($image->get($left + (int) ($x * $moduleSize), $iOffset)) {
+                    $bits->set($x, $y);
+                }
+            }
+        }
+        return $bits;
+    }
+
+    private static function moduleSize($leftTopBlack,  $image) {
+        $height = $image->getHeight();
+        $width = $image->getWidth();
+        $x = $leftTopBlack[0];
+        $y = $leftTopBlack[1];
+        $inBlack = true;
+        $transitions = 0;
+        while ($x < $width && $y < $height) {
+            if ($inBlack != $image->get($x, $y)) {
+                if (++$transitions == 5) {
+                    break;
+                }
+                $inBlack = !$inBlack;
+            }
+            $x++;
+            $y++;
+        }
+        if ($x == $width || $y == $height) {
+            throw NotFoundException::getNotFoundInstance();
+        }
+        return ($x - $leftTopBlack[0]) / 7.0; //return ($x - $leftTopBlack[0]) / 7.0f;
+    }
+
+}