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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;

/**
 * EOT font file.
 *
 * @package php-font-lib
 */
class File extends \FontLib\TrueType\File {
  const TTEMBED_SUBSET                   = 0x00000001;
  const TTEMBED_TTCOMPRESSED             = 0x00000004;
  const TTEMBED_FAILIFVARIATIONSIMULATED = 0x00000010;
  const TTMBED_EMBEDEUDC                 = 0x00000020;
  const TTEMBED_VALIDATIONTESTS          = 0x00000040; // Deprecated
  const TTEMBED_WEBOBJECT      = 0x00000080;
  const TTEMBED_XORENCRYPTDATA = 0x10000000;

/**
   * @var Header
   */
  public $header;

function parseHeader() {
    if (!empty($this->header)) {
      return;
    }

$this->header = new Header($this);
    $this->header->parse();
  }

function parse() {
    $this->parseHeader();

$flags = $this->header->data["Flags"];

if ($flags & self::TTEMBED_TTCOMPRESSED) {
      $mtx_version    = $this->readUInt8();
      $mtx_copy_limit = $this->readUInt8() << 16 | $this->readUInt8() << 8 | $this->readUInt8();
      $mtx_offset_1   = $this->readUInt8() << 16 | $this->readUInt8() << 8 | $this->readUInt8();
      $mtx_offset_2   = $this->readUInt8() << 16 | $this->readUInt8() << 8 | $this->readUInt8();
      /*
      var_dump("$mtx_version $mtx_copy_limit $mtx_offset_1 $mtx_offset_2");

$pos = $this->pos();
      $size = $mtx_offset_1 - $pos;
      var_dump("pos: $pos");
      var_dump("size: $size");*/
    }

if ($flags & self::TTEMBED_XORENCRYPTDATA) {
      // Process XOR
    }
    // TODO Read font data ...
  }

/**
   * Little endian version of the read method
   *
   * @param int $n The number of bytes to read
   *
   * @return string
   */
  public function read($n) {
    if ($n < 1) {
      return "";
    }

$string = (string) fread($this->f, $n);
    $chunks = mb_str_split($string, 2, '8bit');
    $chunks = array_map("strrev", $chunks);
    return implode("", $chunks);
  }

public function readUInt32() {
    $uint32 = parent::readUInt32();

return $uint32 >> 16 & 0x0000FFFF | $uint32 << 16 & 0xFFFF0000;
  }

/**
   * Get font copyright
   *
   * @return string|null
   */
  function getFontCopyright() {
    return null;
  }

/**
   * Get font name
   *
   * @return string|null
   */
  function getFontName() {
    return $this->header->data["FamilyName"];
  }

/**
   * Get font subfamily
   *
   * @return string|null
   */
  function getFontSubfamily() {
    return $this->header->data["StyleName"];
  }

/**
   * Get font subfamily ID
   *
   * @return string|null
   */
  function getFontSubfamilyID() {
    return $this->header->data["StyleName"];
  }

/**
   * Get font full name
   *
   * @return string|null
   */
  function getFontFullName() {
    return $this->header->data["FullName"];
  }

/**
   * Get font version
   *
   * @return string|null
   */
  function getFontVersion() {
    return $this->header->data["VersionName"];
  }

/**
   * Get font weight
   *
   * @return string|null
   */
  function getFontWeight() {
    return $this->header->data["Weight"];
  }

/**
   * Get font Postscript name
   *
   * @return string|null
   */
  function getFontPostscriptName() {
    return null;
  }
}