<?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 $Id$
*/
/** Internally used classes */
require_once 'Zend/Pdf/Element/Array.php';
require_once 'Zend/Pdf/Element/Name.php';
/** Zend_Pdf_Resource_Font */
require_once 'Zend/Pdf/Resource/Font.php';
/**
* Adobe PDF composite fonts implementation
*
* A composite font is one whose glyphs are obtained from other fonts or from fontlike
* objects called CIDFonts ({@link Zend_Pdf_Resource_Font_CidFont}), organized hierarchically.
* In PDF, a composite font is represented by a font dictionary whose Subtype value is Type0;
* this is also called a Type 0 font (the Type 0 font at the top level of the hierarchy is the
* root font).
*
* In PDF, a Type 0 font is a CID-keyed font.
*
* CID-keyed fonts provide effective method to operate with multi-byte character encodings.
*
* The CID-keyed font architecture specifies the external representation of certain font programs,
* called CMap and CIDFont files, along with some conventions for combining and using those files.
*
* A CID-keyed font is the combination of a CMap with one or more CIDFonts, simple fonts,
* or composite fonts containing glyph descriptions.
*
* The term 'CID-keyed font' reflects the fact that CID (character identifier) numbers
* are used to index and access the glyph descriptions in the font.
*
*
* Font objects should be normally be obtained from the factory methods
* {@link Zend_Pdf_Font::fontWithName} and {@link Zend_Pdf_Font::fontWithPath}.
*
* @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_Resource_Font_Type0 extends Zend_Pdf_Resource_Font
{
/**
* Descendant CIDFont
*
* @var Zend_Pdf_Resource_Font_CidFont
*/
private $_descendantFont;
/**
* Generate ToUnicode character map data
*
* @return string
*/
static private function getToUnicodeCMapData()
{
return '/CIDInit /ProcSet findresource begin ' . "\n"
. '12 dict begin ' . "\n"
. 'begincmap ' . "\n"
. '/CIDSystemInfo ' . "\n"
. '<</Registry (Adobe) ' . "\n"
. '/Ordering (UCS) ' . "\n"
. '/Supplement 0' . "\n"
. '>> def' . "\n"
. '/CMapName /Adobe-Identity-UCS def ' . "\n"
. '/CMapType 2 def ' . "\n"
. '1 begincodespacerange' . "\n"
. '<0000> <FFFF> ' . "\n"
. 'endcodespacerange ' . "\n"
. '1 beginbfrange ' . "\n"
. '<0000> <FFFF> <0000> ' . "\n"
. 'endbfrange ' . "\n"
. 'endcmap ' . "\n"
. 'CMapName currentdict /CMap defineresource pop ' . "\n"
. 'end '
. 'end ';
}
/**
* Object constructor
*
*/
public function __construct(Zend_Pdf_Resource_Font_CidFont $descendantFont)
{
parent::__construct();
$this->_objectFactory->attach($descendantFont->getFactory());
$this->_fontType = Zend_Pdf_Font::TYPE_TYPE_0;
$this->_descendantFont = $descendantFont;
$this->_fontNames = $descendantFont->getFontNames();
$this->_isBold = $descendantFont->isBold();
$this->_isItalic = $descendantFont->isItalic();
$this->_isMonospaced = $descendantFont->isMonospace();
$this->_underlinePosition = $descendantFont->getUnderlinePosition();
$this->_underlineThickness = $descendantFont->getUnderlineThickness();
$this->_strikePosition = $descendantFont->getStrikePosition();
$this->_strikeThickness = $descendantFont->getStrikeThickness();
$this->_unitsPerEm = $descendantFont->getUnitsPerEm();
$this->_ascent = $descendantFont->getAscent();
$this->_descent = $descendantFont->getDescent();
$this->_lineGap = $descendantFont->getLineGap();
$this->_resource->Subtype = new Zend_Pdf_Element_Name('Type0');
$this->_resource->BaseFont = new Zend_Pdf_Element_Name($descendantFont->getResource()->BaseFont->value);
$this->_resource->DescendantFonts = new Zend_Pdf_Element_Array(array( $descendantFont->getResource() ));
$this->_resource->Encoding = new Zend_Pdf_Element_Name('Identity-H');
$toUnicode = $this->_objectFactory->newStreamObject(self::getToUnicodeCMapData());
$this->_resource->ToUnicode = $toUnicode;
}
/**
* Returns an array of glyph numbers corresponding to the Unicode characters.
*
* Zend_Pdf uses 'Identity-H' encoding for Type 0 fonts.
* So we don't need to perform any conversion
*
* See also {@link glyphNumberForCharacter()}.
*
* @param array $characterCodes Array of Unicode character codes (code points).
* @return array Array of glyph numbers.
*/
public function glyphNumbersForCharacters($characterCodes)
{
return $characterCodes;
}
/**
* Returns the glyph number corresponding to the Unicode character.
*
* Zend_Pdf uses 'Identity-H' encoding for Type 0 fonts.
* So we don't need to perform any conversion
*
* @param integer $characterCode Unicode character code (code point).
* @return integer Glyph number.
*/
public function glyphNumberForCharacter($characterCode)
{
return $characterCode;
}
/**
* Returns a number between 0 and 1 inclusive that indicates the percentage
* of characters in the string which are covered by glyphs in this font.
*
* Since no one font will contain glyphs for the entire Unicode character
* range, this method can be used to help locate a suitable font when the
* actual contents of the string are not known.
*
* Note that some fonts lie about the characters they support. Additionally,
* fonts don't usually contain glyphs for control characters such as tabs
* and line breaks, so it is rare that you will get back a full 1.0 score.
* The resulting value should be considered informational only.
*
* @param string $string
* @param string $charEncoding (optional) Character encoding of source text.
* If omitted, uses 'current locale'.
* @return float
*/
public function getCoveredPercentage($string, $charEncoding = '')
{
return $this->_descendantFont->getCoveredPercentage($string, $charEncoding);
}
/**
* Returns the widths of the glyphs.
*
* The widths are expressed in the font's glyph space. You are responsible
* for converting to user space as necessary. See {@link unitsPerEm()}.
*
* Throws an exception if the glyph number is out of range.
*
* See also {@link widthForGlyph()}.
*
* @param array &$glyphNumbers Array of glyph numbers.
* @return array Array of glyph widths (integers).
* @throws Zend_Pdf_Exception
*/
public function widthsForGlyphs($glyphNumbers)
{
return $this->_descendantFont->widthsForChars($glyphNumbers);
}
/**
* Returns the width of the glyph.
*
* Like {@link widthsForGlyphs()} but used for one glyph at a time.
*
* @param integer $glyphNumber
* @return integer
* @throws Zend_Pdf_Exception
*/
public function widthForGlyph($glyphNumber)
{
return $this->_descendantFont->widthForChar($glyphNumber);
}
/**
* Convert string to the font encoding.
*
* The method is used to prepare string for text drawing operators
*
* @param string $string
* @param string $charEncoding Character encoding of source text.
* @return string
*/
public function encodeString($string, $charEncoding)
{
return iconv($charEncoding, 'UTF-16BE', $string);
}
/**
* Convert string from the font encoding.
*
* The method is used to convert strings retrieved from existing content streams
*
* @param string $string
* @param string $charEncoding Character encoding of resulting text.
* @return string
*/
public function decodeString($string, $charEncoding)
{
return iconv('UTF-16BE', $charEncoding, $string);
}
}