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enovision/gist:5c547d0d2be1bb4520f72a738d76aba7

Created October 10, 2020 09:43
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  1. enovision created this gist Oct 10, 2020.
    103 changes: 103 additions & 0 deletions gistfile1.txt
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    Original file line number Diff line number Diff line change
    @@ -0,0 +1,103 @@
    <?php
    /*
    * author: Tres Finocchiaro transposed to PHP by Johan van de Merwe
    * date: 2020-08-10
    * license: Public Domain; Use as you wish.
    * source: http://qz.io
    *
    * usage:
    *
    * $data = '^XA...your zpl data.. XZ';
    * $zplconverter = new ZebraDPIConverter(203, 300);
    * $zplconverter->setSource($data, 'string'); // when a string is used
    * /* or */
    * /* $zplconverter->setSource($path, 'path'); // when a path to your zpl template is used */
    * $data = $zplconverter->scale();
    *
    */
    namespace ZebraConverter;

    class ZebraDPIConverter
    {
    private $baseDPI;
    private $targetDPI;

    private $sourceData;

    private $scaleFactor = 1;

    private static $cmds = ['FT', 'FO', 'A0', 'A@', 'LL', 'LH', 'GB', 'FB', 'BY', 'B3'];

    function __construct($baseDPI = 203, $targetDPI = 300, $source = null, $type = null)
    {
    $this->baseDPI = intval($baseDPI);
    $this->targetDPI = intval($targetDPI);

    $this->scaleFactor = $this->targetDPI / $this->baseDPI;

    if ($source !== null) {
    $this->setSource($source, $type);
    }

    return $this;
    }

    public function setSource($source, $type = 'string')
    {
    if (in_array(strtolower($type), ['string', 'text', 'data'])) {
    $this->sourceData = $source;
    } else if (in_array(strtolower($type), ['file', 'path'])) {
    $this->loadSourceFromPath($source);
    }

    return $this;
    }

    public function loadSourceFromPath($path)
    {
    if (file_exists($path)) {
    $this->sourceData = file_get_contents($path);
    } else {
    $this->sourceData = 'File not found in path : ' . $path;
    }

    return $this;
    }

    /*
    * Scales text from a raw ZPL label from 203 DPI to 300 DPI
    */
    function scale()
    {
    $sections = explode('^', $this->sourceData);

    foreach (self::$cmds as $cmd) {
    foreach ($sections as $idx => $section) {

    if (substr($section, 0, strlen($cmd)) === $cmd) {
    $sections[$idx] = $this->scaleSection($cmd, $section);
    }
    }
    }

    return implode('^', $sections);
    }

    /*
    * Scales all integers found in a designated section
    */
    function scaleSection($cmd, $section)
    {
    $section = substr($section, strlen($cmd), strlen($section));

    $parts = explode(',', $section);

    foreach ($parts as $idx => $part) {
    if (is_numeric($part)) {
    $parts[$idx] = round($this->scaleFactor * intval($part));
    }
    }

    return $cmd . implode(',', $parts);
    }
    }