vendor/phenx/php-font-lib/src/FontLib/TrueType/Collection.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\TrueType;
  10
  11 use Countable;
  12 use FontLib\BinaryStream;
  13 use Iterator;
  14 use OutOfBoundsException;
  15
  16 /**
  17  * TrueType collection font file.
  18  *
  19  * @package php-font-lib
  20  */
  21 class Collection extends BinaryStream implements Iterator, Countable {
  22   /**
  23    * Current iterator position.
  24    *
  25    * @var integer
  26    */
  27   private $position = 0;
  28
  29   protected $collectionOffsets = array();
  30   protected $collection = array();
  31   protected $version;
  32   protected $numFonts;
  33
  34   function parse() {
  35     if (isset($this->numFonts)) {
  36       return;
  37     }
  38
  39     $this->read(4); // tag name
  40
  41     $this->version  = $this->readFixed();
  42     $this->numFonts = $this->readUInt32();
  43
  44     for ($i = 0; $i < $this->numFonts; $i++) {
  45       $this->collectionOffsets[] = $this->readUInt32();
  46     }
  47   }
  48
  49   /**
  50    * @param int $fontId
  51    *
  52    * @throws OutOfBoundsException
  53    * @return File
  54    */
  55   function getFont($fontId) {
  56     $this->parse();
  57
  58     if (!isset($this->collectionOffsets[$fontId])) {
  59       throw new OutOfBoundsException();
  60     }
  61
  62     if (isset($this->collection[$fontId])) {
  63       return $this->collection[$fontId];
  64     }
  65
  66     $font    = new File();
  67     $font->f = $this->f;
  68     $font->setTableOffset($this->collectionOffsets[$fontId]);
  69
  70     return $this->collection[$fontId] = $font;
  71   }
  72
  73   function current() {
  74     return $this->getFont($this->position);
  75   }
  76
  77   function key() {
  78     return $this->position;
  79   }
  80
  81   function next() {
  82     return ++$this->position;
  83   }
  84
  85   function rewind() {
  86     $this->position = 0;
  87   }
  88
  89   function valid() {
  90     $this->parse();
  91
  92     return isset($this->collectionOffsets[$this->position]);
  93   }
  94
  95   function count() {
  96     $this->parse();
  97
  98     return $this->numFonts;
  99   }
 100 }