My first commit of codes

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

@@ -0,0 +1,41 @@
+<?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
+ */
+
+/**
+ * `hhea` font table.
+ * 
+ * @package php-font-lib
+ */
+class Font_Table_hhea extends Font_Table {
+  protected $def = array(
+    "version"             => self::Fixed,
+    "ascent"              => self::FWord,
+    "descent"             => self::FWord,
+    "lineGap"             => self::FWord,
+    "advanceWidthMax"     => self::uFWord,
+    "minLeftSideBearing"  => self::FWord,
+    "minRightSideBearing" => self::FWord,
+    "xMaxExtent"          => self::FWord,
+    "caretSlopeRise"      => self::int16,
+    "caretSlopeRun"       => self::int16,
+    "caretOffset"         => self::FWord,
+                             self::int16,
+                             self::int16,
+                             self::int16,
+                             self::int16,
+    "metricDataFormat"    => self::int16,
+    "numOfLongHorMetrics" => self::uint16,
+  );
+  
+  function _encode(){
+    $font = $this->getFont();
+    $this->data["numOfLongHorMetrics"] = count($font->getSubset());
+    
+    return parent::_encode();
+  }
+}