/**
* Encodes string into QR code image
* @param $data
* @return Image
*/
public static function encode($data)
{
$process = ProcessBuilder::create(['qrencode', '-l', 'L', '-s', '8', '-m', '0', '-o', '-', $data])->getProcess();
$process->run();
if ($process->isSuccessful()) {
$image = Image::fromBinary($process->getOutput());
return $image;
}
}
/**
* @param $png string binary content of image
*/
public static function fromImage(Image $image)
{
$bytesPerRow = $image->getWidth() / 8;
$bits = '';
for ($y = 0; $y < $image->getHeight(); $y++) {
for ($x = 0; $x < $image->getWidth(); $x++) {
$bits .= $image->isFilledAt($x, $y) ? '1' : '0';
}
}
// split bits array to one-byte packs
$bytes = implode('', array_map(function ($byte) {
return str_pad(dechex(bindec($byte)), 2, '0', STR_PAD_LEFT);
}, str_split($bits, 8)));
return new self($bytes, $bytesPerRow, true);
}
