vendor/endroid/qrcode/src/Writer/PngWriter.php

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<?php

/*
 * (c) Jeroen van den Enden <info@endroid.nl>
 *
 * This source file is subject to the MIT license that is bundled
 * with this source code in the file LICENSE.
 */

namespace Endroid\QrCode\Writer;

use BaconQrCode\Renderer\Image\Png;
use BaconQrCode\Writer;
use Endroid\QrCode\Exception\MissingFunctionException;
use Endroid\QrCode\Exception\ValidationException;
use Endroid\QrCode\LabelAlignment;
use Endroid\QrCode\QrCodeInterface;
use QrReader;

class PngWriter extends AbstractBaconWriter
{
    /**
     * {@inheritdoc}
     */
    public function writeString(QrCodeInterface $qrCode)
    {
        $renderer = new Png();
        $renderer->setWidth($qrCode->getSize());
        $renderer->setHeight($qrCode->getSize());
        $renderer->setMargin(0);
        $renderer->setForegroundColor($this->convertColor($qrCode->getForegroundColor()));
        $renderer->setBackgroundColor($this->convertColor($qrCode->getBackgroundColor()));

        $writer = new Writer($renderer);
        $string = $writer->writeString($qrCode->getText(), $qrCode->getEncoding(), $this->convertErrorCorrectionLevel($qrCode->getErrorCorrectionLevel()));

        $image = imagecreatefromstring($string);
        $image = $this->addMargin($image, $qrCode->getMargin(), $qrCode->getSize(), $qrCode->getForegroundColor(), $qrCode->getBackgroundColor());

        if ($qrCode->getLogoPath()) {
            $image = $this->addLogo($image, $qrCode->getLogoPath(), $qrCode->getLogoWidth());
        }

        if ($qrCode->getLabel()) {
            $image = $this->addLabel($image, $qrCode->getLabel(), $qrCode->getLabelFontPath(), $qrCode->getLabelFontSize(), $qrCode->getLabelAlignment(), $qrCode->getLabelMargin(), $qrCode->getForegroundColor(), $qrCode->getBackgroundColor());
        }

        $string = $this->imageToString($image);

        if ($qrCode->getValidateResult()) {
            $reader = new QrReader($string, QrReader::SOURCE_TYPE_BLOB);
            if ($reader->text() !== $qrCode->getText()) {
                throw new ValidationException(
                    'Built-in validation reader read "'.$reader->text().'" instead of "'.$qrCode->getText().'".
                     Adjust your parameters to increase readability or disable built-in validation.');
            }
        }

        return $string;
    }