Initial commit: apps.supersam24.ru

vendor/phenx/php-font-lib/src/FontLib/Table/DirectoryEntry.php

@@ -0,0 +1,129 @@
+<?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
+ */
+namespace FontLib\Table;
+
+use FontLib\TrueType\File;
+use FontLib\Font;
+use FontLib\BinaryStream;
+
+/**
+ * Generic Font table directory entry.
+ *
+ * @package php-font-lib
+ */
+class DirectoryEntry extends BinaryStream {
+  /**
+   * @var File
+   */
+  protected $font;
+
+  /**
+   * @var Table
+   */
+  protected $font_table;
+
+  public $entryLength = 4;
+
+  public $tag;
+  public $checksum;
+  public $offset;
+  public $length;
+
+  protected $origF;
+
+  static function computeChecksum($data) {
+    $len = strlen($data);
+    $mod = $len % 4;
+
+    if ($mod) {
+      $data = str_pad($data, $len + (4 - $mod), "\0");
+    }
+
+    $len = strlen($data);
+
+    $hi = 0x0000;
+    $lo = 0x0000;
+
+    for ($i = 0; $i < $len; $i += 4) {
+      $hi += (ord($data[$i]) << 8) + ord($data[$i + 1]);
+      $lo += (ord($data[$i + 2]) << 8) + ord($data[$i + 3]);
+      $hi += $lo >> 16;
+      $lo = $lo & 0xFFFF;
+      $hi = $hi & 0xFFFF;
+    }
+
+    return ($hi << 8) + $lo;
+  }
+
+  function __construct(File $font) {
+    $this->font = $font;
+    $this->f    = $font->f;
+  }
+
+  function parse() {
+    $this->tag = $this->font->read(4);
+  }
+
+  function open($filename, $mode = self::modeRead) {
+    // void
+  }
+
+  function setTable(Table $font_table) {
+    $this->font_table = $font_table;
+  }
+
+  function encode($entry_offset) {
+    Font::d("\n==== $this->tag ====");
+    //Font::d("Entry offset  = $entry_offset");
+
+    $data = $this->font_table;
+    $font = $this->font;
+
+    $table_offset = $font->pos();
+    $this->offset = $table_offset;
+    $table_length = $data->encode();
+
+    $font->seek($table_offset);
+    $table_data = $font->read($table_length);
+
+    $font->seek($entry_offset);
+
+    $font->write($this->tag, 4);
+    $font->writeUInt32(self::computeChecksum($table_data));
+    $font->writeUInt32($table_offset);
+    $font->writeUInt32($table_length);
+
+    Font::d("Bytes written = $table_length");
+
+    $font->seek($table_offset + $table_length);
+  }
+
+  /**
+   * @return File
+   */
+  function getFont() {
+    return $this->font;
+  }
+
+  function startRead() {
+    $this->font->seek($this->offset);
+  }
+
+  function endRead() {
+    //
+  }
+
+  function startWrite() {
+    $this->font->seek($this->offset);
+  }
+
+  function endWrite() {
+    //
+  }
+}
+