<?php
/**
 * GdImage with logo output example
 *
 * @created      18.11.2020
 * @author       smiley <smiley@chillerlan.net>
 * @copyright    2020 smiley
 * @license      MIT
 *
 * @noinspection PhpComposerExtensionStubsInspection, PhpIllegalPsrClassPathInspection
 */

use chillerlan\QRCode\{QRCode, QROptions};
use chillerlan\QRCode\Common\EccLevel;
use chillerlan\QRCode\Data\QRMatrix;
use chillerlan\QRCode\Output\{QRGdImage, QRCodeOutputException};

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

/*
 * Class definition
 */

class QRImageWithLogo extends QRGdImage{

	/**
	 * @param string|null $file
	 * @param string|null $logo
	 *
	 * @return string
	 * @throws \chillerlan\QRCode\Output\QRCodeOutputException
	 */
	public function dump(string $file = null, string $logo = null):string{
		// set returnResource to true to skip further processing for now
		$this->options->returnResource = true;

		// of course, you could accept other formats too (such as resource or Imagick)
		// I'm not checking for the file type either for simplicity reasons (assuming PNG)
		if(!is_file($logo) || !is_readable($logo)){
			throw new QRCodeOutputException('invalid logo');
		}

		// there's no need to save the result of dump() into $this->image here
		parent::dump($file);

		$im = imagecreatefrompng($logo);

		// get logo image size
		$w = imagesx($im);
		$h = imagesy($im);

		// set new logo size, leave a border of 1 module (no proportional resize/centering)
		$lw = (($this->options->logoSpaceWidth - 2) * $this->options->scale);
		$lh = (($this->options->logoSpaceHeight - 2) * $this->options->scale);

		// get the qrcode size
		$ql = ($this->matrix->getSize() * $this->options->scale);

		// scale the logo and copy it over. done!
		imagecopyresampled($this->image, $im, (($ql - $lw) / 2), (($ql - $lh) / 2), 0, 0, $lw, $lh, $w, $h);

		$imageData = $this->dumpImage();

		$this->saveToFile($imageData, $file);

		if($this->options->outputBase64){
			$imageData = $this->toBase64DataURI($imageData, 'image/'.$this->options->outputType);
		}

		return $imageData;
	}

}


/*
 * Runtime
 */

$options = new QROptions;

$options->version             = 5;
$options->outputBase64        = false;
$options->scale               = 6;
$options->imageTransparent    = false;
$options->drawCircularModules = true;
$options->circleRadius        = 0.45;
$options->keepAsSquare        = [
	QRMatrix::M_FINDER,
	QRMatrix::M_FINDER_DOT,
];
// ecc level H is required for logo space
$options->eccLevel            = EccLevel::H;
$options->addLogoSpace        = true;
$options->logoSpaceWidth      = 13;
$options->logoSpaceHeight     = 13;


$qrcode = new QRCode($options);
$qrcode->addByteSegment('https://github.com');

$qrOutputInterface = new QRImageWithLogo($options, $qrcode->getQRMatrix());

// dump the output, with an additional logo
// the logo could also be supplied via the options, see the svgWithLogo example
$out = $qrOutputInterface->dump(null, __DIR__.'/octocat.png');


header('Content-type: image/png');

echo $out;

exit;
