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<?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\EOT;

use Exception;
use FontLib\Font;

/**
 * TrueType font file header.
 *
 * @package php-font-lib
 *
 * @property File $font
 */
class Header extends \FontLib\Header {
  protected $def = array(
    "format"        => self::uint32,
    "numTables"     => self::uint16,
    "searchRange"   => self::uint16,
    "entrySelector" => self::uint16,
    "rangeShift"    => self::uint16,
  );

  public function parse() {
    $font = $this->font;

    $this->data = $font->unpack(array(
      "EOTSize"            => self::uint32,
      "FontDataSize"       => self::uint32,
      "Version"            => self::uint32,
      "Flags"              => self::uint32,
      "FontPANOSE"         => array(self::uint8, 10),
      "Charset"            => self::uint8,
      "Italic"             => self::uint8,
      "Weight"             => self::uint32,
      "fsType"             => self::uint16,
      "MagicNumber"        => self::uint16,
      "UnicodeRange1"      => self::uint32,
      "UnicodeRange2"      => self::uint32,
      "UnicodeRange3"      => self::uint32,
      "UnicodeRange4"      => self::uint32,
      "CodePageRange1"     => self::uint32,
      "CodePageRange2"     => self::uint32,
      "CheckSumAdjustment" => self::uint32,
      "Reserved1"          => self::uint32,
      "Reserved2"          => self::uint32,
      "Reserved3"          => self::uint32,
      "Reserved4"          => self::uint32,
    ));

    $this->data["Padding1"] = $font->readUInt16();
    $this->readString("FamilyName");

    $this->data["Padding2"] = $font->readUInt16();
    $this->readString("StyleName");

    $this->data["Padding3"] = $font->readUInt16();
    $this->readString("VersionName");

    $this->data["Padding4"] = $font->readUInt16();
    $this->readString("FullName");

    switch ($this->data["Version"]) {
      default:
        throw new Exception("Unknown EOT version " . $this->data["Version"]);

      case 0x00010000:
        // Nothing to do more
        break;

      case 0x00020001:
        $this->data["Padding5"] = $font->readUInt16();
        $this->readString("RootString");
        break;

      case 0x00020002:
        $this->data["Padding5"] = $font->readUInt16();
        $this->readString("RootString");

        $this->data["RootStringCheckSum"] = $font->readUInt32();
        $this->data["EUDCCodePage"]       = $font->readUInt32();

        $this->data["Padding6"] = $font->readUInt16();
        $this->readString("Signature");

        $this->data["EUDCFlags"]    = $font->readUInt32();
        $this->data["EUDCFontSize"] = $font->readUInt32();
        break;
    }

    if (!empty($this->data["RootString"])) {
      $this->data["RootString"] = explode("\0", $this->data["RootString"]);
    }
  }

  private function readString($name) {
    $font = $this->font;
    $size = $font->readUInt16();

    $this->data["{$name}Size"] = $size;
    $this->data[$name]         = Font::UTF16ToUTF8($font->read($size));
  }

  public function encode() {
    //return $this->font->pack($this->def, $this->data);
  }
}

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