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svgMeltedModules.php
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svgMeltedModules.php
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<?php
/**
* "melted" modules example
*
* This code generates an SVG QR code with rounded corners. It uses a round rect for each square and then additional
* paths to fill in the gap where squares are next to each other. Adjacent squares overlap - to almost completely
* eliminate hairline antialias "cracks" that tend to appear when two SVG paths are exactly adjacent to each other.
*
* @see https://github.com/chillerlan/php-qrcode/issues/127
* @see ./shapes.svg
*/
declare(strict_types=1);
use chillerlan\QRCode\{QRCode, QROptions};
use chillerlan\QRCode\Common\EccLevel;
use chillerlan\QRCode\Data\QRMatrix;
use chillerlan\QRCode\Output\QRMarkupSVG;
require_once __DIR__.'/../vendor/autoload.php';
/*
* Class definition
*/
/**
* the extended SVG output module
*/
class MeltedSVGQRCodeOutput extends QRMarkupSVG{
protected function path(string $path, int $M_TYPE):string{
// omit the "fill" and "opacity" attributes on the path element
return sprintf('<path class="%s" d="%s"/>', $this->getCssClass($M_TYPE), $path);
}
protected function collectModules(Closure $transform):array{
$paths = [];
$melt = $this->options->melt; // avoid magic getter in long loops
// collect the modules for each type
foreach($this->matrix->getMatrix() as $y => $row){
foreach($row as $x => $M_TYPE){
$M_TYPE_LAYER = $M_TYPE;
if($this->connectPaths && !$this->matrix->checkTypeIn($x, $y, $this->excludeFromConnect)){
// to connect paths we'll redeclare the $M_TYPE_LAYER to data only
$M_TYPE_LAYER = QRMatrix::M_DATA;
if($this->matrix->isDark($M_TYPE)){
$M_TYPE_LAYER = QRMatrix::M_DATA_DARK;
}
}
// if we're going to "melt" the matrix, we'll declare *all* modules as dark,
// so that light modules with dark parts are rendered in the same path
if($melt){
$M_TYPE_LAYER |= QRMatrix::IS_DARK;
}
// collect the modules per $M_TYPE
$module = $transform($x, $y, $M_TYPE, $M_TYPE_LAYER);
if(!empty($module)){
$paths[$M_TYPE_LAYER][] = $module;
}
}
}
// beautify output
ksort($paths);
return $paths;
}
protected function module(int $x, int $y, int $M_TYPE):string{
$bits = $this->matrix->checkNeighbours($x, $y, null);
$check = fn(int $all, int $any = 0):bool => ($bits & ($all | (~$any & 0xff))) === $all;
$template = ($M_TYPE & QRMatrix::IS_DARK) === QRMatrix::IS_DARK
? $this->darkModule($check, $this->options->inverseMelt)
: $this->lightModule($check, $this->options->inverseMelt);
$r = $this->options->meltRadius;
return sprintf($template, $x, $y, $r, (1 - $r), (1 - 2 * $r));
}
/**
* returns a dark module for the given values
*/
protected function darkModule(Closure $check, bool $invert):string{
switch(true){
// 4 rounded
case !$invert && $check(0b00000000, 0b01010101):
case $invert && $check(0b00000000, 0b00000000):
return 'M%1$s,%2$s m0,%3$s v%5$s q0,%3$s %3$s,%3$s h%5$s q%3$s,0 %3$s,-%3$s v-%5$s q0,-%3$s -%3$s,-%3$s h-%5$s q-%3$s,0 -%3$s,%3$sZ';
// 3 rounded
case $invert && $check(0b01000000, 0b00000000): // 135
return 'M%1$s,%2$s m0,1 h%4$s q%3$s,0 %3$s,-%3$s v-%5$s q0,-%3$s -%3$s,-%3$s h-%5$s q-%3$s,0 -%3$s,%3$sZ';
case $invert && $check(0b00000001, 0b00000000): // 357
return 'M%1$s,%2$s v%4$s q0,%3$s %3$s,%3$s h%5$s q%3$s,0 %3$s,-%3$s v-%5$s q0,-%3$s -%3$s,-%3$sZ';
case $invert && $check(0b00000100, 0b00000000): // 571
return 'M%1$s,%2$s m1,0 v%4$s q0,%3$s -%3$s,%3$s h-%5$s q-%3$s,0 -%3$s,-%3$s v-%5$s q0,-%3$s %3$s,-%3$sZ';
case $invert && $check(0b00010000, 0b00000000): // 713
return 'M%1$s,%2$s m1,1 h-%4$s q-%3$s,0 -%3$s,-%3$s v-%5$s q0,-%3$s %3$s,-%3$s h%5$s q%3$s,0 %3$s,%3$sZ';
// 2 rounded
case !$invert && $check(0b00100000, 0b01010101): // 13
case $invert && $check(0b00000000, 0b01110000):
return 'M%1$s,%2$s m0,1 h1 v-%4$s q0,-%3$s -%3$s,-%3$s h-%5$s q-%3$s,0 -%3$s,%3$sZ';
case !$invert && $check(0b10000000, 0b01010101): // 35
case $invert && $check(0b00000000, 0b11000001):
return 'M%1$s,%2$s v1 h%4$s q%3$s,0 %3$s,-%3$s v-%5$s q0,-%3$s -%3$s,-%3$sZ';
case !$invert && $check(0b00000010, 0b01010101): // 57
case $invert && $check(0b00000000, 0b00000111):
return 'M%1$s,%2$s v%4$s q0,%3$s %3$s,%3$s h%5$s q%3$s,0 %3$s,-%3$s v-%4$sZ';
case !$invert && $check(0b00001000, 0b01010101): // 71
case $invert && $check(0b00000000, 0b00011100):
return 'M%1$s,%2$s m1,1 v-1 h-%4$s q-%3$s,0 -%3$s,%3$s v%5$s q0,%3$s %3$s,%3$sZ';
// diagonal
case $invert && $check(0b01000100, 0b00000000): // 15
return 'M%1$s,%2$s m0,1 h%4$s q%3$s,0 %3$s,-%3$s v-%4$s h-%4$s q-%3$s,0 -%3$s,%3$sZ';
case $invert && $check(0b00010001, 0b00000000): // 37
return 'M%1$s,%2$s h%4$s q%3$s,0 %3$s,%3$s v%4$s h-%4$s q-%3$s,0 -%3$s,-%3$sZ';
// 1 rounded
case !$invert && $check(0b00101000, 0b01010101): // 1
case $invert && $check(0b00000000, 0b01111100):
return 'M%1$s,%2$s m0,1 h1 v-1 h-%4$s q-%3$s,0 -%3$s,%3$sZ';
case !$invert && $check(0b10100000, 0b01010101): // 3
case $invert && $check(0b00000000, 0b11110001):
return 'M%1$s,%2$s h%4$s q%3$s,0 %3$s,%3$s v%4$s h-1Z';
case !$invert && $check(0b10000010, 0b01010101): // 5
case $invert && $check(0b00000000, 0b11000111):
return 'M%1$s,%2$s h1 v%4$s q0,%3$s -%3$s,%3$s h-%4$sZ';
case !$invert && $check(0b00001010, 0b01010101): // 7
case $invert && $check(0b00000000, 0b00011111):
return 'M%1$s,%2$s v%4$s q0,%3$s %3$s,%3$s h%4$s v-1Z';
default:
// full square
return 'M%1$s,%2$s h1 v1 h-1Z';
}
}
/**
* returns a light module for the given values
*/
protected function lightModule(Closure $check, bool $invert):string{
switch(true){
// 4 rounded
case !$invert && $check(0b11111111, 0b01010101):
case $invert && $check(0b10101010, 0b01010101):
return 'M%1$s,%2$s h%3$s q-%3$s,0 -%3$s,%3$sz m1,0 v%3$s q0,-%3$s -%3$s,-%3$sz m0,1 h-%3$s q%3$s,0 %3$s,-%3$sz m-1,0 v-%3$s q0,%3$s %3$s,%3$sZ';
// 3 rounded
case !$invert && $check(0b10111111, 0b00000000): // 135
return 'M%1$s,%2$s h%3$s q-%3$s,0 -%3$s,%3$sz m1,0 v%3$s q0,-%3$s -%3$s,-%3$sz m0,1 h-%3$s q%3$s,0 %3$s,-%3$sZ';
case !$invert && $check(0b11111110, 0b00000000): // 357
return 'M%1$s,%2$s m1,0 v%3$s q0,-%3$s -%3$s,-%3$sz m0,1 h-%3$s q%3$s,0 %3$s,-%3$sz m-1,0 v-%3$s q0,%3$s %3$s,%3$sZ';
case !$invert && $check(0b11111011, 0b00000000): // 571
return 'M%1$s,%2$s h%3$s q-%3$s,0 -%3$s,%3$sz m0,1 v-%3$s q0,%3$s %3$s,%3$sz m1,0 h-%3$s q%3$s,0 %3$s,-%3$sZ';
case !$invert && $check(0b11101111, 0b00000000): // 713
return 'M%1$s,%2$s h%3$s q-%3$s,0 -%3$s,%3$sz m0,1 v-%3$s q0,%3$s %3$s,%3$sz m1,-1 v%3$s q0,-%3$s -%3$s,-%3$sZ';
// 2 rounded
case !$invert && $check(0b10001111, 0b01110000): // 13
case $invert && $check(0b10001010, 0b01010101):
return 'M%1$s,%2$s h%3$s q-%3$s,0 -%3$s,%3$sz m1,0 v%3$s q0,-%3$s -%3$s,-%3$sZ';
case !$invert && $check(0b00111110, 0b11000001): // 35
case $invert && $check(0b00101010, 0b01010101):
return 'M%1$s,%2$s m1,0 v%3$s q0,-%3$s -%3$s,-%3$sz m0,1 h-%3$s q%3$s,0 %3$s,-%3$sZ';
case !$invert && $check(0b11111000, 0b00000111): // 57
case $invert && $check(0b10101000, 0b01010101):
return 'M%1$s,%2$s m1,1 h-%3$s q%3$s,0 %3$s,-%3$sz m-1,0 v-%3$s q0,%3$s %3$s,%3$sZ';
case !$invert && $check(0b11100011, 0b00011100): // 71
case $invert && $check(0b10100010, 0b01010101):
return 'M%1$s,%2$s h%3$s q-%3$s,0 -%3$s,%3$sz m0,1 v-%3$s q0,%3$s %3$s,%3$sZ';
// diagonal
case !$invert && $check(0b10111011, 0b00000000): // 15
return 'M%1$s,%2$s h%3$s q-%3$s,0 -%3$s,%3$sz m1,1 h-%3$s q%3$s,0 %3$s,-%3$sZ';
case !$invert && $check(0b11101110, 0b00000000): // 37
return 'M%1$s,%2$s m1,0 v%3$s q0,-%3$s -%3$s,-%3$sz m-1,1 v-%3$s q0,%3$s %3$s,%3$sZ';
// 1 rounded
case !$invert && $check(0b10000011, 0b01111100): // 1
case $invert && $check(0b10000010, 0b01010101):
return 'M%1$s,%2$s h%3$s q-%3$s,0 -%3$s,%3$sZ';
case !$invert && $check(0b00001110, 0b11110001): // 3
case $invert && $check(0b00001010, 0b01010101):
return 'M%1$s,%2$s m1,0 v%3$s q0,-%3$s -%3$s,-%3$sZ';
case !$invert && $check(0b00111000, 0b11000111): // 5
case $invert && $check(0b00101000, 0b01010101):
return 'M%1$s,%2$s m1,1 h-%3$s q%3$s,0 %3$s,-%3$sZ';
case !$invert && $check(0b11100000, 0b00011111): // 7
case $invert && $check(0b10100000, 0b01010101):
return 'M%1$s,%2$s m0,1 v-%3$s q0,%3$s %3$s,%3$sZ';
default:
// empty block
return '';
}
}
}
/**
* the augmented options class
*
* @property bool $melt
* @property bool $inverseMelt
* @property float $meltRadius
*/
class MeltedOutputOptions extends QROptions{
/**
* enable "melt" effect
*/
protected bool $melt = false;
/**
* whether to let the melt effect flow along the dark or light modules
*/
protected bool $inverseMelt = false;
/**
* the corner radius for melted modules
*/
protected float $meltRadius = 0.15;
/**
* clamp/set melt corner radius
*/
protected function set_meltRadius(float $meltRadius):void{
$this->meltRadius = max(0.01, min(0.5, $meltRadius));
}
}
/*
* Runtime
*/
$options = new MeltedOutputOptions;
// settings from the custom options class
$options->melt = true;
$options->inverseMelt = true;
$options->meltRadius = 0.4;
$options->version = 7;
$options->outputInterface = MeltedSVGQRCodeOutput::class;
$options->outputBase64 = false;
$options->addQuietzone = true;
$options->eccLevel = EccLevel::H;
$options->addLogoSpace = true;
$options->logoSpaceWidth = 13;
$options->logoSpaceHeight = 13;
$options->connectPaths = true;
$options->excludeFromConnect = [
QRMatrix::M_FINDER_DARK,
QRMatrix::M_FINDER_DOT,
];
$options->svgDefs = '
<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[
.light, .dark{fill: url(#rainbow);}
]]></style>';
$out = (new QRCode($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;