* @copyright 2024 smiley
* @license MIT
*/
declare(strict_types=1);
use chillerlan\QRCode\{QRCode, QROptions};
use chillerlan\QRCode\Data\QRMatrix;
use chillerlan\QRCode\Output\QRMarkupSVG;
use chillerlan\Settings\SettingsContainerInterface;
require_once __DIR__.'/../vendor/autoload.php';
/*
* Class definition
*/
/**
* the extended SVG output module
*/
class ModuleJitterSVGoutput extends QRMarkupSVG{
protected const ROUND_PRECISION = 5;
protected readonly float $sideLength;
public function __construct(QROptions|SettingsContainerInterface $options, QRMatrix $matrix){
parent::__construct($options, $matrix);
// copy the value to a local property to avoid excessive magic getter calls
$this->sideLength = $this->options->sideLength;
}
// emulates JS Math.random()
protected function random():float{
return (random_int(0, PHP_INT_MAX) / PHP_INT_MAX);
}
protected function moduleTransform(int $x, int $y, int $M_TYPE, int $M_TYPE_LAYER):string|null{
// skip light modules
if((!$this->options->drawLightModules && !$this->matrix->check($x, $y))){
return null;
}
// early exit on pure square modules
if($this->matrix->checkTypeIn($x, $y, $this->options->keepAsSquare)){
// phpcs:ignore
return "M$x,$y h1 v1 h-1Z";
}
// calculate the maximum tilt angle of the square with the previously determined side length
$maxAngle = (45 - rad2deg(acos(1 / hypot($this->sideLength, $this->sideLength))));
// set the maximum angle from the options and clamp between valid min/max
$maxAngle = max(0, min($maxAngle, $this->options->maxAngle));
// randomize the tilt angle
$a = ($this->random() * $maxAngle);
// calculate the opposite and adjacent sides of the triangle
$opp = round((cos(deg2rad($a)) * $this->sideLength), self::ROUND_PRECISION);
$adj = round((sin(deg2rad($a)) * $this->sideLength), self::ROUND_PRECISION);
// tilt to the left
if($this->random() > 0.5){
$x = round(($x + 0.5 - $opp / 2 - $adj / 2), self::ROUND_PRECISION);
$y = round(($y + 0.5 - $opp / 2 + $adj / 2), self::ROUND_PRECISION);
// phpcs:ignore
return "M$x,$y l$opp,-$adj l$adj,$opp l-$opp,$adj Z";
}
// tilt right
$x = round(($x + 0.5 - $opp / 2 + $adj / 2), self::ROUND_PRECISION);
$y = round(($y + 0.5 - $opp / 2 - $adj / 2), self::ROUND_PRECISION);
// phpcs:ignore
return "M$x,$y l$opp,$adj l-$adj,$opp l-$opp,-$adj Z";
}
}
/**
* the augmented options class
*
* @property float $sideLength
* @property float $maxAngle
*/
class ModuleJitterOptions extends QROptions{
/**
* the side length of the modules (calmped internally between square root of 0.5 (at 45°) and 1 (full length))
*/
protected float $sideLength = 0.8;
/**
* The maximum tilt angle (clamped inside the 1x1 module, at a maximum of 45 degrees)
*/
protected float $maxAngle = 45.0;
/**
* clamp the side length
*/
protected function set_sideLength(float $sideLength):void{
$this->sideLength = max(M_SQRT1_2, min(1.0, $sideLength));
}
}
/*
* Runtime
*/
$options = new ModuleJitterOptions;
// settings from the custom options class
$options->sideLength = 0.85;
$options->maxAngle = 45.0;
$options->version = 7;
$options->outputInterface = ModuleJitterSVGoutput::class;
$options->drawLightModules = false;
$options->svgUseFillAttributes = false;
$options->outputBase64 = false;
$options->addQuietzone = true;
$options->connectPaths = true;
$options->keepAsSquare = [
QRMatrix::M_FINDER_DARK,
QRMatrix::M_FINDER_DOT,
QRMatrix::M_ALIGNMENT_DARK,
];
$options->svgDefs = '
';
$out = (new QRCode($options))->render('https://www.youtube.com/watch?v=dQw4w9WgXcQ');
if(PHP_SAPI !== 'cli'){
header('Content-type: image/svg+xml');
if(extension_loaded('zlib')){
header('Vary: Accept-Encoding');
header('Content-Encoding: gzip');
$out = gzencode($out, 9);
}
}
echo $out;
exit;