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<?php/** * Zend Framework * * LICENSE * * This source file is subject to the new BSD license that is bundled * with this package in the file LICENSE.txt. * It is also available through the world-wide-web at this URL: * http://framework.zend.com/license/new-bsd * If you did not receive a copy of the license and are unable to * obtain it through the world-wide-web, please send an email * to license@zend.com so we can send you a copy immediately. * * @category Zend * @package Zend_Pdf * @subpackage Fonts * @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com) * @license http://framework.zend.com/license/new-bsd New BSD License * @version $Id$ */
/** Zend_Pdf_Cmap */// require_once 'Zend/Pdf/Cmap.php';
/** * Implements the "trimmed table mapping" character map (type 6). * * This table type is preferred over the {@link Zend_Pdf_Cmap_SegmentToDelta} * table when the Unicode characters covered by the font fall into a single * contiguous range. * * @package Zend_Pdf * @subpackage Fonts * @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com) * @license http://framework.zend.com/license/new-bsd New BSD License */class Zend_Pdf_Cmap_TrimmedTable extends Zend_Pdf_Cmap{ /**** Instance Variables ****/
/** * The starting character code covered by this table. * @var integer */ protected $_startCode = 0;
/** * The ending character code covered by this table. * @var integer */ protected $_endCode = 0;
/** * Glyph index array. Stores the actual glyph numbers. * @var array */ protected $_glyphIndexArray = array();
/**** Public Interface ****/
/* Concrete Class Implementation */
/** * Returns an array of glyph numbers corresponding to the Unicode characters. * * If a particular character doesn't exist in this font, the special 'missing * character glyph' will be substituted. * * See also {@link glyphNumberForCharacter()}. * * @param array $characterCodes Array of Unicode character codes (code points). * @return array Array of glyph numbers. */ public function glyphNumbersForCharacters($characterCodes) { $glyphNumbers = array(); foreach ($characterCodes as $key => $characterCode) {
if (($characterCode < $this->_startCode) || ($characterCode > $this->_endCode)) { $glyphNumbers[$key] = Zend_Pdf_Cmap::MISSING_CHARACTER_GLYPH; continue; }
$glyphIndex = $characterCode - $this->_startCode; $glyphNumbers[$key] = $this->_glyphIndexArray[$glyphIndex];
} return $glyphNumbers; }
/** * Returns the glyph number corresponding to the Unicode character. * * If a particular character doesn't exist in this font, the special 'missing * character glyph' will be substituted. * * See also {@link glyphNumbersForCharacters()} which is optimized for bulk * operations. * * @param integer $characterCode Unicode character code (code point). * @return integer Glyph number. */ public function glyphNumberForCharacter($characterCode) { if (($characterCode < $this->_startCode) || ($characterCode > $this->_endCode)) { return Zend_Pdf_Cmap::MISSING_CHARACTER_GLYPH; } $glyphIndex = $characterCode - $this->_startCode; return $this->_glyphIndexArray[$glyphIndex]; }
/** * Returns an array containing the Unicode characters that have entries in * this character map. * * @return array Unicode character codes. */ public function getCoveredCharacters() { $characterCodes = array(); for ($code = $this->_startCode; $code <= $this->_endCode; $code++) { $characterCodes[] = $code; } return $characterCodes; }
/** * Returns an array containing the glyphs numbers that have entries in this character map. * Keys are Unicode character codes (integers) * * This functionality is partially covered by glyphNumbersForCharacters(getCoveredCharacters()) * call, but this method do it in more effective way (prepare complete list instead of searching * glyph for each character code). * * @internal * @return array Array representing <Unicode character code> => <glyph number> pairs. */ public function getCoveredCharactersGlyphs() { $glyphNumbers = array(); for ($code = $this->_startCode; $code <= $this->_endCode; $code++) { $glyphNumbers[$code] = $this->_glyphIndexArray[$code - $this->_startCode]; }
return $glyphNumbers; }
/* Object Lifecycle */
/** * Object constructor * * Parses the raw binary table data. Throws an exception if the table is * malformed. * * @param string $cmapData Raw binary cmap table data. * @throws Zend_Pdf_Exception */ public function __construct($cmapData) { /* Sanity check: The table should be at least 9 bytes in size. */ $actualLength = strlen($cmapData); if ($actualLength < 9) { // require_once 'Zend/Pdf/Exception.php';
throw new Zend_Pdf_Exception('Insufficient table data', Zend_Pdf_Exception::CMAP_TABLE_DATA_TOO_SMALL); }
/* Sanity check: Make sure this is right data for this table type. */ $type = $this->_extractUInt2($cmapData, 0); if ($type != Zend_Pdf_Cmap::TYPE_TRIMMED_TABLE) { // require_once 'Zend/Pdf/Exception.php';
throw new Zend_Pdf_Exception('Wrong cmap table type', Zend_Pdf_Exception::CMAP_WRONG_TABLE_TYPE); }
$length = $this->_extractUInt2($cmapData, 2); if ($length != $actualLength) { // require_once 'Zend/Pdf/Exception.php';
throw new Zend_Pdf_Exception("Table length ($length) does not match actual length ($actualLength)", Zend_Pdf_Exception::CMAP_WRONG_TABLE_LENGTH); }
/* Mapping tables should be language-independent. The font may not work * as expected if they are not. Unfortunately, many font files in the * wild incorrectly record a language ID in this field, so we can't * call this a failure. */ $language = $this->_extractUInt2($cmapData, 4); if ($language != 0) { // Record a warning here somehow?
}
$this->_startCode = $this->_extractUInt2($cmapData, 6);
$entryCount = $this->_extractUInt2($cmapData, 8); $expectedCount = ($length - 10) >> 1; if ($entryCount != $expectedCount) { // require_once 'Zend/Pdf/Exception.php';
throw new Zend_Pdf_Exception("Entry count is wrong; expected: $expectedCount; actual: $entryCount", Zend_Pdf_Exception::CMAP_WRONG_ENTRY_COUNT); }
$this->_endCode = $this->_startCode + $entryCount - 1;
$offset = 10; for ($i = 0; $i < $entryCount; $i++, $offset += 2) { $this->_glyphIndexArray[] = $this->_extractUInt2($cmapData, $offset); }
/* Sanity check: After reading all of the data, we should be at the end * of the table. */ if ($offset != $length) { // require_once 'Zend/Pdf/Exception.php';
throw new Zend_Pdf_Exception("Ending offset ($offset) does not match length ($length)", Zend_Pdf_Exception::CMAP_FINAL_OFFSET_NOT_LENGTH); } }
}
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