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<?php |
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/** |
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* Class QREps |
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* |
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* @created 09.05.2022 |
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* @author smiley <[email protected]> |
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* @copyright 2022 smiley |
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* @license MIT |
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*/ |
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namespace chillerlan\QRCode\Output; |
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use function array_values, count, date, implode, is_array, is_numeric, max, min, round, sprintf; |
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/** |
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* Encapsulated Postscript (EPS) output |
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* |
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* @see https://github.com/t0k4rt/phpqrcode/blob/bb29e6eb77e0a2a85bb0eb62725e0adc11ff5a90/qrvect.php#L52-L137 |
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* @see https://web.archive.org/web/20170818010030/http://wwwimages.adobe.com/content/dam/Adobe/en/devnet/postscript/pdfs/5002.EPSF_Spec.pdf |
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* @see https://web.archive.org/web/20210419003859/https://www.adobe.com/content/dam/acom/en/devnet/actionscript/articles/PLRM.pdf |
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* @see https://github.com/chillerlan/php-qrcode/discussions/148 |
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*/ |
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class QREps extends QROutputAbstract{ |
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/** |
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* @inheritDoc |
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*/ |
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public static function moduleValueIsValid($value):bool{ |
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if(!is_array($value) || count($value) < 3){ |
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return false; |
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} |
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// check the first values of the array |
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foreach(array_values($value) as $i => $val){ |
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if($i > 3){ |
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break; |
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} |
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if(!is_numeric($val)){ |
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return false; |
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} |
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} |
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return true; |
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} |
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/** |
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* @param array $value |
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* |
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* @inheritDoc |
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*/ |
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protected function prepareModuleValue($value):array{ |
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$values = []; |
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foreach(array_values($value) as $i => $val){ |
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if($i > 3){ |
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break; |
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} |
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// clamp value and convert from int 0-255 to float 0-1 RGB/CMYK range |
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$values[] = round((max(0, min(255, intval($val))) / 255), 6); |
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} |
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return $values; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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protected function getDefaultModuleValue(bool $isDark):array{ |
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return ($isDark) ? [0.0, 0.0, 0.0] : [1.0, 1.0, 1.0]; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function dump(string $file = null):string{ |
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$eps = [ |
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// main header |
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'%!PS-Adobe-3.0 EPSF-3.0', |
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'%%Creator: php-qrcode (https://github.com/chillerlan/php-qrcode)', |
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'%%Title: QR Code', |
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sprintf('%%%%CreationDate: %1$s', date('c')), |
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'%%DocumentData: Clean7Bit', |
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'%%LanguageLevel: 3', |
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sprintf('%%%%BoundingBox: 0 0 %1$s %1$s', $this->length), |
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'%%EndComments', |
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// function definitions |
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'%%BeginProlog', |
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'/F { rectfill } def', |
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'/R { setrgbcolor } def', |
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'/C { setcmykcolor } def', |
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'%%EndProlog', |
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]; |
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// create the path elements |
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$paths = $this->collectModules(fn(int $x, int $y):string => $this->module($x, $y)); |
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foreach($paths as $M_TYPE => $path){ |
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if(empty($path)){ |
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continue; |
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} |
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// 4 values will be interpreted as CMYK, 3 as RGB |
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$val = $this->getModuleValue($M_TYPE); |
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$format = (count($val) === 4) ? '%f %f %f %f C' : '%f %f %f R'; |
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$eps[] = sprintf($format, ...$val); |
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$eps[] = implode("\n", $path); |
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} |
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// end file |
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$eps[] = '%%EOF'; |
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$data = implode("\n", $eps); |
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$this->saveToFile($data, $file); |
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return $data; |
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} |
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/** |
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* returns a path segment for a single module |
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*/ |
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protected function module(int $x, int $y):string{ |
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if(!$this->options->drawLightModules && !$this->matrix->check($x, $y)){ |
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return ''; |
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} |
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$outputX = ($x * $this->scale); |
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// Actual size - one block = Topmost y pos. |
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$top = ($this->length - $this->scale); |
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// Apparently y-axis is inverted (y0 is at bottom and not top) in EPS, so we have to switch the y-axis here |
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$outputY = ($top - ($y * $this->scale)); |
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return sprintf('%d %d %d %d F', $outputX, $outputY, $this->scale, $this->scale); |
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} |
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} |
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chillerlan /
php-qrcode
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