106 lines
3.2 KiB
PHP
106 lines
3.2 KiB
PHP
<?php
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namespace Zxing;
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use Zxing\Common\HybridBinarizer;
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use Zxing\Qrcode\QRCodeReader;
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final class QrReader
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{
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const SOURCE_TYPE_FILE = 'file';
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const SOURCE_TYPE_BLOB = 'blob';
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const SOURCE_TYPE_RESOURCE = 'resource';
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private $bitmap;
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private $reader;
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private $result;
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public function __construct($imgSource, $sourceType = QrReader::SOURCE_TYPE_FILE, $useImagickIfAvailable = true)
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{
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if (!in_array($sourceType, [
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self::SOURCE_TYPE_FILE,
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self::SOURCE_TYPE_BLOB,
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self::SOURCE_TYPE_RESOURCE,
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], true)) {
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throw new \InvalidArgumentException('Invalid image source.');
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}
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$im = null;
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switch ($sourceType) {
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case QrReader::SOURCE_TYPE_FILE:
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if ($useImagickIfAvailable && extension_loaded('imagick')) {
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$im = new \Imagick();
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$im->readImage($imgSource);
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} else {
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$image = file_get_contents($imgSource);
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$im = imagecreatefromstring($image);
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}
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break;
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case QrReader::SOURCE_TYPE_BLOB:
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if ($useImagickIfAvailable && extension_loaded('imagick')) {
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$im = new \Imagick();
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$im->readImageBlob($imgSource);
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} else {
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$im = imagecreatefromstring($imgSource);
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}
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break;
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case QrReader::SOURCE_TYPE_RESOURCE:
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$im = $imgSource;
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if ($useImagickIfAvailable && extension_loaded('imagick')) {
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$useImagickIfAvailable = true;
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} else {
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$useImagickIfAvailable = false;
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}
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break;
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}
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if ($useImagickIfAvailable && extension_loaded('imagick')) {
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if (!$im instanceof \Imagick) {
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throw new \InvalidArgumentException('Invalid image source.');
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}
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$width = $im->getImageWidth();
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$height = $im->getImageHeight();
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$source = new IMagickLuminanceSource($im, $width, $height);
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} else {
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if (!is_resource($im) && !is_object($im)) {
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throw new \InvalidArgumentException('Invalid image source.');
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}
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$width = imagesx($im);
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$height = imagesy($im);
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$source = new GDLuminanceSource($im, $width, $height);
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}
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$histo = new HybridBinarizer($source);
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$this->bitmap = new BinaryBitmap($histo);
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$this->reader = new QRCodeReader();
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}
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public function decode()
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{
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try {
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$this->result = $this->reader->decode($this->bitmap);
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} catch (NotFoundException $er) {
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$this->result = false;
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} catch (FormatException $er) {
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$this->result = false;
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} catch (ChecksumException $er) {
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$this->result = false;
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}
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}
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public function text()
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{
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$this->decode();
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if (method_exists($this->result, 'toString')) {
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return $this->result->toString();
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}
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return $this->result;
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}
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public function getResult()
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{
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return $this->result;
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}
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}
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