My first commit of codes

vendor/phenx/php-font-lib/classes/Font_Table_loca.php

@@ -0,0 +1,73 @@
+<?php
+/**
+ * @package php-font-lib
+ * @link    https://github.com/PhenX/php-font-lib
+ * @author  Fabien Ménager <fabien.menager@gmail.com>
+ * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
+ */
+
+/**
+ * `loca` font table.
+ * 
+ * @package php-font-lib
+ */
+class Font_Table_loca extends Font_Table {
+  protected function _parse(){
+    $font = $this->getFont();
+    $offset = $font->pos();
+    
+    $indexToLocFormat = $font->getData("head", "indexToLocFormat");
+    $numGlyphs = $font->getData("maxp", "numGlyphs");
+    
+    $font->seek($offset);
+    
+    $data = array();
+    
+    // 2 bytes
+    if ($indexToLocFormat == 0) {
+      $d = $font->read(($numGlyphs + 1) * 2);
+      $loc = unpack("n*", $d);
+      
+      for ($i = 0; $i <= $numGlyphs; $i++) {
+        $data[] = $loc[$i+1] * 2;
+      }
+    }
+    
+    // 4 bytes
+    else if ($indexToLocFormat == 1) {
+      $d = $font->read(($numGlyphs + 1) * 4);
+      $loc = unpack("N*", $d);
+      
+      for ($i = 0; $i <= $numGlyphs; $i++) {
+        $data[] = $loc[$i+1];
+      }
+    }
+    
+    $this->data = $data;
+  }
+  
+  function _encode(){
+    $font = $this->getFont();
+    $data = $this->data;
+    
+    $indexToLocFormat = $font->getData("head", "indexToLocFormat");
+    $numGlyphs = $font->getData("maxp", "numGlyphs");
+    $length = 0;
+    
+    // 2 bytes
+    if ($indexToLocFormat == 0) {
+      for ($i = 0; $i <= $numGlyphs; $i++) {
+        $length += $font->writeUInt16($data[$i] / 2);
+      }
+    }
+    
+    // 4 bytes
+    else if ($indexToLocFormat == 1) {
+      for ($i = 0; $i <= $numGlyphs; $i++) {
+        $length += $font->writeUInt32($data[$i]);
+      }
+    }
+    
+    return $length;
+  }
+}