mirror of
https://github.com/chillerlan/php-qrcode.git
synced 2026-10-26 05:35:15 +00:00
smiley
132 lines
3.0 KiB
PHP
132 lines
3.0 KiB
PHP
<?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 <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 chillerlan\QRCode\Output;
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use function 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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protected function moduleValueIsValid($value):bool{
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if(!is_array($value) || count($value) < 3){
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return false;
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}
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// check the first 3 values of the array
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for($i = 0; $i < 3; $i++){
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if(!is_numeric($value[$i])){
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return false;
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}
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}
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return true;
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}
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/**
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* @inheritDoc
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*/
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protected function getModuleValue($value):array{
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$val = [];
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for($i = 0; $i < 3; $i++){
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// clamp value and convert from 0-255 to 0-1 RGB range
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$val[] = round(max(0, min(255, $value[$i])) / 255, 6);
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}
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return $val;
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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 $file = null):string{
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$file ??= $this->options->cachefile;
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$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', $this->length),
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'%%EndComments',
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// function definitions
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'%%BeginProlog',
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'/F { rectfill } def',
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'/S { setrgbcolor } def',
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'%%EndProlog'
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];
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// create the path elements
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$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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$eps[] = sprintf('%f %f %f S', ...$this->moduleValues[$M_TYPE]);
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$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", $eps);
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if($file !== null){
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$this->saveToFile($data, $file);
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}
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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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