Nice-looking rounded QR code

[Meldiron]

As a follow-up for the issue: #297

The solution to my problem with the expected design is a custom output interface, here is an example that makes it rounded: https://github.com/chillerlan/php-qrcode/blob/main/examples/imageWithRoundedShapes.php

Two adjustments I made to make it look nicer:

• Make circle radius +2px, to prevent blocky edges
• Remove inner rounding to look less "fluidy", more like real-world rounded QR codes

I was also able to port it for Imagick by extending QRImagick instead, and using methods $this->imagickDraw->rectangle() and $this->imagickDraw->circle().

Additionally, I found a nicer marker design and overlayed it over the generated QR code. I also added a logo in the center. This was the final look:

If anyone is looking to make similar-lookign qr codes, here is the source code:

use chillerlan\QRCode\Data\QRMatrix;
use chillerlan\Settings\SettingsContainerInterface;
use chillerlan\QRCode\Common\EccLevel;
use chillerlan\QRCode\Output\QRImagick;
use chillerlan\QRCode\QRCode;
use chillerlan\QRCode\QROptions;

        $options = new QROptions([
            'quietzoneSize' => $margin,
            'addQuietzone' => $margin > 0,
            'readerUseImagickIfAvailable' => true,
            'outputInterface' => QRGdRounded::class,
            'returnResource' => true,
            'outputBase64' => false,
            'scale' => 64,
            'quality' => 75,
            'imagickFormat' => 'png',
            'drawCircularModules' => true,
            'addLogoSpace' => true,
            'eccLevel' => EccLevel::H, // Needed for addLogoSpace
            'logoSpaceWidth' => 10,
            'logoSpaceHeight' => 10,
        ]);

        $qrcode = new QRCode($options);

        $output = $qrcode->render($text); // Binary data

class QRGdRounded extends QRImagick {
	protected function module(int $x, int $y, int $M_TYPE):void {
    	if(!$this->matrix->isDark($M_TYPE)){
    		return;
    	}
    
    	$this->imagickDraw->setFillColor($this->getModuleValue($M_TYPE));
     
        $neighbours = $this->matrix->checkNeighbours($x, $y);
        $x1         = ($x * $this->scale);
		$y1         = ($y * $this->scale);
		$x2         = (($x + 1) * $this->scale);
		$y2         = (($y + 1) * $this->scale);
		$rectsize   = (int)($this->scale / 2);

		if(($neighbours & (1 << 7))) {
			$this->imagickDraw->rectangle($x1, $y1, ($x1 + $rectsize), ($y1 + $rectsize));
			$this->imagickDraw->rectangle($x1, ($y2 - $rectsize), ($x1 + $rectsize), $y2);
		}

		if(($neighbours & (1 << 3))) {
			$this->imagickDraw->rectangle(($x2 - $rectsize), $y1, $x2, ($y1 + $rectsize));
			$this->imagickDraw->rectangle(($x2 - $rectsize), ($y2 - $rectsize), $x2, $y2);
		}

		if(($neighbours & (1 << 1))) {
			$this->imagickDraw->rectangle($x1, $y1, ($x1 + $rectsize), ($y1 + $rectsize));
			$this->imagickDraw->rectangle(($x2 - $rectsize), $y1, $x2, ($y1 + $rectsize));
		}

		if(($neighbours & (1 << 5))) {
			$this->imagickDraw->rectangle($x1, ($y2 - $rectsize), ($x1 + $rectsize), $y2);
			$this->imagickDraw->rectangle(($x2 - $rectsize), ($y2 - $rectsize), $x2, $y2);
		}
		
        $this->imagickDraw->circle(
			(($x + 0.5) * $this->scale),
			(($y + 0.5) * $this->scale),
			((($x + 0.5 + $this->circleRadius) * $this->scale) + 2),
			((($y + 0.5) * $this->scale) + 2)
		);

  		return;
	}
}