vendor/phenx/php-font-lib/src/FontLib/Table/Type/hmtx.php

   1 <?php
   2 /**
   3  * @package php-font-lib
   4  * @link    https://github.com/PhenX/php-font-lib
   5  * @author  Fabien Ménager <fabien.menager@gmail.com>
   6  * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
   7  */
   8
   9 namespace FontLib\Table\Type;
  10 use FontLib\Table\Table;
  11
  12 /**
  13  * `hmtx` font table.
  14  *
  15  * @package php-font-lib
  16  */
  17 class hmtx extends Table {
  18   protected function _parse() {
  19     $font   = $this->getFont();
  20     $offset = $font->pos();
  21
  22     $numOfLongHorMetrics = $font->getData("hhea", "numOfLongHorMetrics");
  23     $numGlyphs           = $font->getData("maxp", "numGlyphs");
  24
  25     $font->seek($offset);
  26
  27     $data = array();
  28     $metrics = $font->readUInt16Many($numOfLongHorMetrics * 2);
  29     for ($gid = 0, $mid = 0; $gid < $numOfLongHorMetrics; $gid++) {
  30       $advanceWidth    = isset($metrics[$mid]) ? $metrics[$mid] : 0;
  31       $mid += 1;
  32       $leftSideBearing = isset($metrics[$mid]) ? $metrics[$mid] : 0;
  33       $mid += 1;
  34       $data[$gid]      = array($advanceWidth, $leftSideBearing);
  35     }
  36
  37     if ($numOfLongHorMetrics < $numGlyphs) {
  38       $lastWidth = end($data);
  39       $data      = array_pad($data, $numGlyphs, $lastWidth);
  40     }
  41
  42     $this->data = $data;
  43   }
  44
  45   protected function _encode() {
  46     $font   = $this->getFont();
  47     $subset = $font->getSubset();
  48     $data   = $this->data;
  49
  50     $length = 0;
  51
  52     foreach ($subset as $gid) {
  53       $length += $font->writeUInt16($data[$gid][0]);
  54       $length += $font->writeUInt16($data[$gid][1]);
  55     }
  56
  57     return $length;
  58   }
  59 }