82 lines
2.2 KiB
PHP
82 lines
2.2 KiB
PHP
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<?php
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/**
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* Class QRImageWithLogo
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*
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* @filesource QRImageWithLogo.php
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* @created 18.11.2020
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* @package chillerlan\QRCodeExamples
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* @author smiley <smiley@chillerlan.net>
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* @copyright 2020 smiley
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* @license MIT
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*
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* @noinspection PhpComposerExtensionStubsInspection
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*/
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namespace chillerlan\QRCodeExamples;
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use chillerlan\QRCode\Output\{QRCodeOutputException, QRImage};
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use function imagecopyresampled, imagecreatefrompng, imagesx, imagesy, is_file, is_readable;
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/**
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* @property \chillerlan\QRCodeExamples\LogoOptions $options
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*/
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class QRImageWithLogo extends QRImage{
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/**
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* @param string|null $file
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* @param string|null $logo
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*
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* @return string
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* @throws \chillerlan\QRCode\Output\QRCodeOutputException
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*/
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public function dump(string $file = null, string $logo = null):string{
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// set returnResource to true to skip further processing for now
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$this->options->returnResource = true;
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// of course you could accept other formats too (such as resource or Imagick)
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// i'm not checking for the file type either for simplicity reasons (assuming PNG)
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if(!is_file($logo) || !is_readable($logo)){
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throw new QRCodeOutputException('invalid logo');
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}
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$this->matrix->setLogoSpace(
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$this->options->logoWidth,
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$this->options->logoHeight
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// not utilizing the position here
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);
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// there's no need to save the result of dump() into $this->image here
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parent::dump($file);
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$im = imagecreatefrompng($logo);
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// get logo image size
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$w = imagesx($im);
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$h = imagesy($im);
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// set new logo size, leave a border of 1 module
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$lw = ($this->options->logoWidth - 2) * $this->options->scale;
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$lh = ($this->options->logoHeight - 2) * $this->options->scale;
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// get the qrcode size
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$ql = $this->matrix->size() * $this->options->scale;
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// scale the logo and copy it over. done!
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imagecopyresampled($this->image, $im, ($ql - $lw) / 2, ($ql - $lh) / 2, 0, 0, $lw, $lh, $w, $h);
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$imageData = $this->dumpImage();
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if($file !== null){
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$this->saveToFile($imageData, $file);
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}
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if($this->options->imageBase64){
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$imageData = 'data:image/'.$this->options->outputType.';base64,'.base64_encode($imageData);
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}
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return $imageData;
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}
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}
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