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<?php |
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|
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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 <smiley@chillerlan.net> |
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* @copyright 2022 smiley |
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* @license MIT |
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*/ |
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namespace WCPOS\Vendor\chillerlan\QRCode\Output; |
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|
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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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public const MIME_TYPE = 'application/postscript'; |
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/** |
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* @inheritDoc |
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*/ |
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public static function moduleValueIsValid($value) : bool |
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{ |
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if (!is_array($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) : string |
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{ |
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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 $this->formatColor($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) : string |
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{ |
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return $this->formatColor($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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* Set the color format string |
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* |
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* 4 values in the color array will be interpreted as CMYK, 3 as RGB |
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* |
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* @throws \chillerlan\QRCode\Output\QRCodeOutputException |
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*/ |
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protected function formatColor(array $values) : string |
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{ |
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$count = count($values); |
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if ($count < 3) { |
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throw new QRCodeOutputException('invalid color value'); |
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} |
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$format = $count === 4 ? '%f %f %f %f C' : '%f %f %f R'; |
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return sprintf($format, ...$values); |
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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 $file = null) : string |
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{ |
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[$width, $height] = $this->getOutputDimensions(); |
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$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 %s %s', $width, $height), |
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'%%EndComments', |
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// function definitions |
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'%%BeginProlog', |
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'/F { rectfill } def', |
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'/R { setrgbcolor } def', |
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'/C { setcmykcolor } def', |
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'%%EndProlog', |
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]; |
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if ($this::moduleValueIsValid($this->options->bgColor)) { |
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$eps[] = $this->prepareModuleValue($this->options->bgColor); |
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$eps[] = sprintf('0 0 %s %s F', $width, $height); |
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} |
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// create the path elements |
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/** @phan-suppress-next-line PhanDeprecatedFunction */ |
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$paths = $this->collectModules(fn(int $x, int $y, int $M_TYPE): string => $this->module($x, $y, $M_TYPE)); |
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foreach ($paths as $M_TYPE => $path) { |
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if ($path === []) { |
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continue; |
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} |
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$eps[] = $this->getModuleValue($M_TYPE); |
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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, int $M_TYPE) : string |
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{ |
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if (!$this->drawLightModules && !$this->matrix->isDark($M_TYPE)) { |
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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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