QR-CODE 1 bit (black and white without gray)

sviluppatoreLaRegione commented 3 years ago

I am not sure if this it's an issue with this library or another one where I add the QR Code generated to a PDF, but seem that the qr-code is not totally black and white but has some shades of gray. It's possible to fix this?

Thanks

endroid commented 3 years ago

Hi @sviluppatoreLaRegione please provide some information on what version of the library you are using, what writer and settings / options and an example of the problematic output so I can check or reproduce the issue.

sviluppatoreLaRegione commented 3 years ago

This is the code that I use:


<?php

    require_once __DIR__ . '/vendor/autoload.php';

    use Endroid\QrCode\QrCode;

    $codes = "1234-5678-9ABC-DEFG-HILMN-OPQR\n1234-5678-9ABC-DEFG-HILMN-OPQR";
    $qrCode = new QrCode($codes);
    $qrCode->setSize(1000);
    $qrCode->setMargin(0);
    $qrCode->setRoundBlockSize(false);
    $qrCode->setValidateResult(true);
    $qrCode->writeFile(__DIR__.'/qrcode.png');

    $box = '
        <table style="border: 1px solid black; border-radius: 5px;">
            <tr>
                <td style="font-size: 30px; padding: 10px;">
                    '.nl2br($codes).'
                </td>
                <td style="padding: 10px;">
                    <img src="http://etlux.test/qrcode.png" width="145px">
                </td>
            </tr>
        </table>
    ';

    if(isset($_GET['pdf'])) :
        $mpdf = new \Mpdf\Mpdf();
        $mpdf->WriteHTML($box);
        $mpdf->Output();
        die;
    endif;
?>
<!DOCTYPE HTML>
<html>
<head>
    <meta charset="utf-8" />
    <title>App</title>
    <meta name="viewport" content="width=device-width, initial-scale=1" />
</head>
<body>
    <h1>ETLUX</h1>

    <?= $box ?>

    <p style="font-size: 30px;"><a href="index.php?pdf">Genera PDF</a></p>

</body>
</html>

The version from composer:

    "require-dev": {
        "endroid/quality": "^1.3.7",
        "setasign/fpdf": "^1.8"
    },

Thanks

endroid commented 3 years ago

Hi @sviluppatoreLaRegione I generated the code here following the exact same script.

$codes = "1234-5678-9ABC-DEFG-HILMN-OPQR\n1234-5678-9ABC-DEFG-HILMN-OPQR";
$qrCode = new QrCode($codes);
$qrCode->setSize(1000);
$qrCode->setMargin(0);
$qrCode->setRoundBlockSize(false);
$qrCode->setValidateResult(true);
$qrCode->writeFile(__DIR__.'/qrcode.png');

And I got this result. As you can see a perfectly white / black image. So image generation from this library seems OK so you should look at the PDF generation or display.

qrcode

sviluppatoreLaRegione commented 3 years ago

Yeah, I see... something get wrong when image is resized and added on PDF. Thanks

endroid / qr-code

QR-CODE 1 bit (black and white without gray) #300