update v1.0.3.3

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

@@ -0,0 +1,72 @@
+<?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
+ */
+
+/**
+ * `kern` font table.
+ * 
+ * @package php-font-lib
+ */
+class Font_Table_kern extends Font_Table {
+  protected function _parse(){
+    $font = $this->getFont();
+    
+    $data = $font->unpack(array(
+      "version"    => self::uint16,
+      "nTables"    => self::uint16,
+    
+      // only the first subtable will be parsed
+      "subtableVersion" => self::uint16,
+      "length"     => self::uint16,
+      "coverage"   => self::uint16,
+    ));
+    
+    $data["format"] = ($data["coverage"] >> 8);
+    
+    $subtable = array();
+    
+    switch($data["format"]) {
+      case 0:
+      $subtable = $font->unpack(array(
+        "nPairs"        => self::uint16,
+        "searchRange"   => self::uint16,
+        "entrySelector" => self::uint16,
+        "rangeShift"    => self::uint16,
+      ));
+      
+      $pairs = array();
+      $tree = array();
+       
+      for ($i = 0; $i < $subtable["nPairs"]; $i++) {
+        $left  = $font->readUInt16();
+        $right = $font->readUInt16();
+        $value = $font->readInt16();
+        
+        $pairs[] = array(
+          "left"  => $left,
+          "right" => $right,
+          "value" => $value,
+        );
+        
+        $tree[$left][$right] = $value;
+      }
+      
+      //$subtable["pairs"] = $pairs;
+      $subtable["tree"] = $tree;
+      break;
+      
+      case 1:
+      case 2:
+      case 3:
+      break;
+    }
+    
+    $data["subtable"] = $subtable;
+    
+    $this->data = $data;
+  }
+}