/framework/vendor/zend/Zend/Pdf/Cmap/TrimmedTable.php
PHP | 231 lines | 87 code | 33 blank | 111 comment | 18 complexity | 92a67c13540a39f804d02674f6efcb67 MD5 | raw file
Possible License(s): BSD-3-Clause, LGPL-2.1
- <?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) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
- * @license http://framework.zend.com/license/new-bsd New BSD License
- * @version $Id: TrimmedTable.php 20096 2010-01-06 02:05:09Z bkarwin $
- */
- /** 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) 2005-2010 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);
- }
- }
- }