mirror of
https://github.com/chillerlan/php-qrcode.git
synced 2026-08-18 15:40:06 +00:00
smiley
232 lines
6.5 KiB
PHP
232 lines
6.5 KiB
PHP
<?php
|
|
/**
|
|
* @see https://github.com/chillerlan/php-qrcode/discussions/137
|
|
*
|
|
* @created 09.07.2022
|
|
* @author smiley <smiley@chillerlan.net>
|
|
* @copyright 2022 smiley
|
|
* @license MIT
|
|
*
|
|
* @noinspection PhpIllegalPsrClassPathInspection
|
|
*/
|
|
|
|
use chillerlan\QRCode\Common\EccLevel;
|
|
use chillerlan\QRCode\Data\QRMatrix;
|
|
use chillerlan\QRCode\Output\QRMarkupSVG;
|
|
use chillerlan\QRCode\{QRCode, QROptions};
|
|
|
|
require_once __DIR__.'/../vendor/autoload.php';
|
|
|
|
/*
|
|
* Class definition
|
|
*/
|
|
|
|
/**
|
|
* the extended SVG output module
|
|
*/
|
|
class RoundQuietzoneSVGoutput extends QRMarkupSVG{
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
protected function createMarkup(bool $saveToFile):string{
|
|
// some Pythagorean magick
|
|
$diameter = sqrt(2 * pow($this->moduleCount + $this->options->additionalModules, 2));
|
|
// calculate the quiet zone size, add 1 to it as the outer circle stroke may go outside of it
|
|
$quietzoneSize = (int)ceil(($diameter - $this->moduleCount) / 2) + 1;
|
|
// add the quiet zone to fill the circle
|
|
$this->matrix->setQuietZone($quietzoneSize);
|
|
// update the matrix dimensions to avoid errors in subsequent calculations
|
|
// the moduleCount is now QR Code matrix + 2x quiet zone
|
|
$this->setMatrixDimensions();
|
|
// color the quiet zone
|
|
$this->colorQuietzone($quietzoneSize, $diameter / 2);
|
|
|
|
// start SVG output
|
|
$svg = $this->header();
|
|
|
|
if(!empty($this->options->svgDefs)){
|
|
$svg .= sprintf('<defs>%1$s%2$s</defs>%2$s', $this->options->svgDefs, $this->options->eol);
|
|
}
|
|
|
|
$svg .= $this->paths();
|
|
$svg .= $this->addCircle($diameter / 2);
|
|
|
|
// close svg
|
|
$svg .= sprintf('%1$s</svg>%1$s', $this->options->eol);
|
|
|
|
// transform to data URI only when not saving to file
|
|
if(!$saveToFile && $this->options->imageBase64){
|
|
$svg = $this->base64encode($svg, 'image/svg+xml');
|
|
}
|
|
|
|
return $svg;
|
|
}
|
|
|
|
/**
|
|
* Sets random modules of the quiet zone to dark
|
|
*/
|
|
protected function colorQuietzone(int $quietzoneSize, float $radius):void{
|
|
$l1 = $quietzoneSize - 1;
|
|
$l2 = $this->moduleCount - $quietzoneSize;
|
|
// substract 1/2 stroke width and module radius from the circle radius to not cut off modules
|
|
$r = $radius - $this->options->circleRadius * 2;
|
|
|
|
foreach($this->matrix->matrix() as $y => $row){
|
|
foreach($row as $x => $value){
|
|
|
|
// skip anything that's not quiet zone
|
|
if($value !== QRMatrix::M_QUIETZONE){
|
|
continue;
|
|
}
|
|
|
|
// leave one row of quiet zone around the matrix
|
|
if(
|
|
($x === $l1 && $y >= $l1 && $y <= $l2)
|
|
|| ($x === $l2 && $y >= $l1 && $y <= $l2)
|
|
|| ($y === $l1 && $x >= $l1 && $x <= $l2)
|
|
|| ($y === $l2 && $x >= $l1 && $x <= $l2)
|
|
){
|
|
continue;
|
|
}
|
|
|
|
// we need to add 0.5 units to the check values since we're calculating the element centers
|
|
// ($x/$y is the element's assumed top left corner)
|
|
if($this->checkIfInsideCircle($x + 0.5, $y + 0.5, $r)){
|
|
$this->matrix->set($x, $y, (bool)rand(0, 1), QRMatrix::M_QUIETZONE);
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* @see https://stackoverflow.com/a/7227057
|
|
*/
|
|
protected function checkIfInsideCircle(float $x, float $y, float $radius):bool{
|
|
$dx = abs($x - $this->moduleCount / 2);
|
|
$dy = abs($y - $this->moduleCount / 2);
|
|
|
|
if($dx + $dy <= $radius){
|
|
return true;
|
|
}
|
|
|
|
if($dx > $radius || $dy > $radius){
|
|
return false;
|
|
}
|
|
|
|
if(pow($dx, 2) + pow($dy, 2) <= pow($radius, 2)){
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* add a solid circle around the matrix
|
|
*/
|
|
protected function addCircle(float $radius):string{
|
|
return sprintf(
|
|
'%4$s<circle id="circle" cx="%1$s" cy="%1$s" r="%2$s" stroke-width="%3$s"/>',
|
|
$this->moduleCount / 2,
|
|
round($radius, 5),
|
|
$this->options->circleRadius * 2,
|
|
$this->options->eol
|
|
);
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* the augmented options class
|
|
*/
|
|
class RoundQuietzoneOptions extends QROptions{
|
|
|
|
/**
|
|
* The amount of additional modules to be used in the circle diameter calculation
|
|
*
|
|
* Note that the middle of the circle stroke goes through the (assumed) outer corners
|
|
* or centers of the QR Code (excluding quiet zone)
|
|
*
|
|
* Example:
|
|
*
|
|
* - a value of -1 would go through the center of the outer corner modules of the finder patterns
|
|
* - a value of 0 would go through the corner of the outer modules of the finder patterns
|
|
* - a value of 3 would go through the center of the module outside next to the finder patterns, in a 45 degree angle
|
|
*/
|
|
protected int $additionalModules = 0;
|
|
|
|
}
|
|
|
|
|
|
/*
|
|
* Runtime
|
|
*/
|
|
|
|
$options = new RoundQuietzoneOptions([
|
|
'additionalModules' => 5,
|
|
|
|
'version' => 7,
|
|
'eccLevel' => EccLevel::H, // maximum error correction capacity, esp. for print
|
|
'addQuietzone' => false, // we're not adding a quiet zone, this is done internally in our own module
|
|
'imageBase64' => false, // avoid base64 URI output
|
|
'outputType' => QRCode::OUTPUT_CUSTOM,
|
|
'outputInterface' => RoundQuietzoneSVGoutput::class, // load our own output class
|
|
'markupDark' => '', // avoid "fill" attributes on paths
|
|
'markupLight' => '',
|
|
'imageTransparent' => true, // set to false to add the light modules
|
|
|
|
'connectPaths' => true,
|
|
'excludeFromConnect' => [
|
|
QRMatrix::M_FINDER|QRMatrix::IS_DARK,
|
|
QRMatrix::M_FINDER_DOT|QRMatrix::IS_DARK,
|
|
QRMatrix::M_ALIGNMENT|QRMatrix::IS_DARK,
|
|
QRMatrix::M_QUIETZONE|QRMatrix::IS_DARK
|
|
],
|
|
|
|
'drawCircularModules' => true,
|
|
'circleRadius' => 0.4,
|
|
'keepAsSquare' => [
|
|
QRMatrix::M_FINDER|QRMatrix::IS_DARK,
|
|
QRMatrix::M_FINDER_DOT|QRMatrix::IS_DARK,
|
|
QRMatrix::M_ALIGNMENT|QRMatrix::IS_DARK,
|
|
],
|
|
// https://developer.mozilla.org/en-US/docs/Web/SVG/Element/linearGradient
|
|
'svgDefs' => '
|
|
<linearGradient id="blurple" x1="100%" y2="100%">
|
|
<stop stop-color="#D70071" offset="0"/>
|
|
<stop stop-color="#9C4E97" offset="0.5"/>
|
|
<stop stop-color="#0035A9" offset="1"/>
|
|
</linearGradient>
|
|
<linearGradient id="rainbow" x1="100%" y2="100%">
|
|
<stop stop-color="#e2453c" offset="2.5%"/>
|
|
<stop stop-color="#e07e39" offset="21.5%"/>
|
|
<stop stop-color="#e5d667" offset="40.5%"/>
|
|
<stop stop-color="#51b95b" offset="59.5%"/>
|
|
<stop stop-color="#1e72b7" offset="78.5%"/>
|
|
<stop stop-color="#6f5ba7" offset="97.5%"/>
|
|
</linearGradient>
|
|
<style><![CDATA[
|
|
.dark{ fill: url(#rainbow); }
|
|
.light{ fill: #dedede; }
|
|
.qr-2304{ fill: url(#blurple); }
|
|
#circle{ fill: none; stroke: url(#blurple); }
|
|
]]></style>',
|
|
]);
|
|
|
|
$qrcode = (new QRCode($options))->render('https://www.youtube.com/watch?v=dQw4w9WgXcQ');
|
|
|
|
if(php_sapi_name() !== 'cli'){
|
|
header('Content-type: image/svg+xml');
|
|
|
|
if(extension_loaded('zlib')){
|
|
header('Vary: Accept-Encoding');
|
|
header('Content-Encoding: gzip');
|
|
$qrcode = gzencode($qrcode, 9);
|
|
}
|
|
}
|
|
|
|
echo $qrcode;
|
|
|
|
exit;
|