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<?php
/**
* Class QRImageWithLogo
*
* @filesource QRImageWithLogo.php
* @created 18.11.2020
* @package chillerlan\QRCodeExamples
* @author smiley <[email protected]>
* @copyright 2020 smiley
* @license MIT
*
* @noinspection PhpComposerExtensionStubsInspection
*/
namespace chillerlan\QRCodeExamples;
use chillerlan\QRCode\Output\{QRCodeOutputException, QRImage};
use function imagecopyresampled, imagecreatefrompng, imagesx, imagesy, is_file, is_readable;
/**
* @property \chillerlan\QRCodeExamples\LogoOptions $options
*/
class QRImageWithLogo extends QRImage{
/**
* @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');
}
$this->matrix->setLogoSpace(
$this->options->logoSpaceWidth,
$this->options->logoSpaceHeight
// not utilizing the position here
);
// 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->size() * $this->options->scale;
// scale the logo and copy it over. done!
imagecopyresampled($this->image, $im, ($ql - $lw) / 2, ($ql - $lh) / 2, 0, 0, $lw, $lh, $w, $h);
$imageData = $this->dumpImage();
if($file !== null){
$this->saveToFile($imageData, $file);
}
if($this->options->imageBase64){
$imageData = 'data:image/'.$this->options->outputType.';base64,'.base64_encode($imageData);
}
return $imageData;
}
}
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