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257 lines
9.4 KiB
257 lines
9.4 KiB
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Pdf
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* @subpackage Fonts
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* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id$
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*/
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/** Internally used classes */
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// require_once 'Zend/Pdf/Element/Array.php';
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// require_once 'Zend/Pdf/Element/Name.php';
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/** Zend_Pdf_Resource_Font */
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// require_once 'Zend/Pdf/Resource/Font.php';
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/**
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* Adobe PDF composite fonts implementation
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*
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* A composite font is one whose glyphs are obtained from other fonts or from fontlike
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* objects called CIDFonts ({@link Zend_Pdf_Resource_Font_CidFont}), organized hierarchically.
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* In PDF, a composite font is represented by a font dictionary whose Subtype value is Type0;
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* this is also called a Type 0 font (the Type 0 font at the top level of the hierarchy is the
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* root font).
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*
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* In PDF, a Type 0 font is a CID-keyed font.
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*
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* CID-keyed fonts provide effective method to operate with multi-byte character encodings.
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*
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* The CID-keyed font architecture specifies the external representation of certain font programs,
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* called CMap and CIDFont files, along with some conventions for combining and using those files.
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*
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* A CID-keyed font is the combination of a CMap with one or more CIDFonts, simple fonts,
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* or composite fonts containing glyph descriptions.
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*
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* The term 'CID-keyed font' reflects the fact that CID (character identifier) numbers
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* are used to index and access the glyph descriptions in the font.
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*
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*
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* Font objects should be normally be obtained from the factory methods
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* {@link Zend_Pdf_Font::fontWithName} and {@link Zend_Pdf_Font::fontWithPath}.
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*
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* @package Zend_Pdf
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* @subpackage Fonts
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* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Pdf_Resource_Font_Type0 extends Zend_Pdf_Resource_Font
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{
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/**
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* Descendant CIDFont
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*
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* @var Zend_Pdf_Resource_Font_CidFont
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*/
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private $_descendantFont;
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/**
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* Generate ToUnicode character map data
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*
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* @return string
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*/
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static private function getToUnicodeCMapData()
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{
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return '/CIDInit /ProcSet findresource begin ' . "\n"
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. '12 dict begin ' . "\n"
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. 'begincmap ' . "\n"
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. '/CIDSystemInfo ' . "\n"
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. '<</Registry (Adobe) ' . "\n"
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. '/Ordering (UCS) ' . "\n"
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. '/Supplement 0' . "\n"
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. '>> def' . "\n"
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. '/CMapName /Adobe-Identity-UCS def ' . "\n"
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. '/CMapType 2 def ' . "\n"
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. '1 begincodespacerange' . "\n"
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. '<0000> <FFFF> ' . "\n"
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. 'endcodespacerange ' . "\n"
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. '1 beginbfrange ' . "\n"
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. '<0000> <FFFF> <0000> ' . "\n"
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. 'endbfrange ' . "\n"
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. 'endcmap ' . "\n"
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. 'CMapName currentdict /CMap defineresource pop ' . "\n"
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. 'end '
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. 'end ';
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}
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/**
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* Object constructor
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*
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*/
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public function __construct(Zend_Pdf_Resource_Font_CidFont $descendantFont)
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{
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parent::__construct();
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$this->_objectFactory->attach($descendantFont->getFactory());
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$this->_fontType = Zend_Pdf_Font::TYPE_TYPE_0;
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$this->_descendantFont = $descendantFont;
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$this->_fontNames = $descendantFont->getFontNames();
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$this->_isBold = $descendantFont->isBold();
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$this->_isItalic = $descendantFont->isItalic();
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$this->_isMonospaced = $descendantFont->isMonospace();
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$this->_underlinePosition = $descendantFont->getUnderlinePosition();
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$this->_underlineThickness = $descendantFont->getUnderlineThickness();
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$this->_strikePosition = $descendantFont->getStrikePosition();
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$this->_strikeThickness = $descendantFont->getStrikeThickness();
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$this->_unitsPerEm = $descendantFont->getUnitsPerEm();
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$this->_ascent = $descendantFont->getAscent();
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$this->_descent = $descendantFont->getDescent();
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$this->_lineGap = $descendantFont->getLineGap();
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$this->_resource->Subtype = new Zend_Pdf_Element_Name('Type0');
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$this->_resource->BaseFont = new Zend_Pdf_Element_Name($descendantFont->getResource()->BaseFont->value);
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$this->_resource->DescendantFonts = new Zend_Pdf_Element_Array(array( $descendantFont->getResource() ));
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$this->_resource->Encoding = new Zend_Pdf_Element_Name('Identity-H');
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$toUnicode = $this->_objectFactory->newStreamObject(self::getToUnicodeCMapData());
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$this->_resource->ToUnicode = $toUnicode;
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}
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/**
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* Returns an array of glyph numbers corresponding to the Unicode characters.
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*
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* Zend_Pdf uses 'Identity-H' encoding for Type 0 fonts.
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* So we don't need to perform any conversion
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*
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* See also {@link glyphNumberForCharacter()}.
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*
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* @param array $characterCodes Array of Unicode character codes (code points).
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* @return array Array of glyph numbers.
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*/
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public function glyphNumbersForCharacters($characterCodes)
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{
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return $characterCodes;
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}
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/**
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* Returns the glyph number corresponding to the Unicode character.
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*
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* Zend_Pdf uses 'Identity-H' encoding for Type 0 fonts.
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* So we don't need to perform any conversion
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*
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* @param integer $characterCode Unicode character code (code point).
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* @return integer Glyph number.
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*/
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public function glyphNumberForCharacter($characterCode)
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{
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return $characterCode;
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}
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/**
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* Returns a number between 0 and 1 inclusive that indicates the percentage
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* of characters in the string which are covered by glyphs in this font.
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*
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* Since no one font will contain glyphs for the entire Unicode character
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* range, this method can be used to help locate a suitable font when the
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* actual contents of the string are not known.
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*
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* Note that some fonts lie about the characters they support. Additionally,
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* fonts don't usually contain glyphs for control characters such as tabs
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* and line breaks, so it is rare that you will get back a full 1.0 score.
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* The resulting value should be considered informational only.
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*
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* @param string $string
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* @param string $charEncoding (optional) Character encoding of source text.
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* If omitted, uses 'current locale'.
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* @return float
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*/
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public function getCoveredPercentage($string, $charEncoding = '')
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{
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return $this->_descendantFont->getCoveredPercentage($string, $charEncoding);
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}
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/**
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* Returns the widths of the glyphs.
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*
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* The widths are expressed in the font's glyph space. You are responsible
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* for converting to user space as necessary. See {@link unitsPerEm()}.
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*
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* Throws an exception if the glyph number is out of range.
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*
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* See also {@link widthForGlyph()}.
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*
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* @param array &$glyphNumbers Array of glyph numbers.
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* @return array Array of glyph widths (integers).
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* @throws Zend_Pdf_Exception
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*/
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public function widthsForGlyphs($glyphNumbers)
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{
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return $this->_descendantFont->widthsForChars($glyphNumbers);
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}
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/**
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* Returns the width of the glyph.
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*
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* Like {@link widthsForGlyphs()} but used for one glyph at a time.
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*
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* @param integer $glyphNumber
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* @return integer
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* @throws Zend_Pdf_Exception
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*/
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public function widthForGlyph($glyphNumber)
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{
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return $this->_descendantFont->widthForChar($glyphNumber);
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}
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/**
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* Convert string to the font encoding.
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*
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* The method is used to prepare string for text drawing operators
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*
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* @param string $string
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* @param string $charEncoding Character encoding of source text.
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* @return string
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*/
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public function encodeString($string, $charEncoding)
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{
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return iconv($charEncoding, 'UTF-16BE', $string);
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}
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/**
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* Convert string from the font encoding.
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*
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* The method is used to convert strings retrieved from existing content streams
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*
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* @param string $string
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* @param string $charEncoding Character encoding of resulting text.
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* @return string
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*/
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public function decodeString($string, $charEncoding)
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{
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return iconv('UTF-16BE', $charEncoding, $string);
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}
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}
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