Pdf/Resource/Font/Type0.php

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Category
Zend  
Copyright
Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)  
License
New BSD License  
Package
Zend_Pdf  
Subpackage
Fonts  
Version
$Id$  

\Zend_Pdf_Resource_Font_Type0
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Package: Zend_Pdf\Fonts
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}.
Parent(s)
\Zend_Pdf_Resource_Font < \Zend_Pdf_Resource
Copyright
Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)  
License
New BSD License  

Properties

>VPropertyprivate\Zend_Pdf_Resource_Font_CidFont $_descendantFont
Descendant CIDFont
Details
Type
\Zend_Pdf_Resource_Font_CidFont

Methods

methodpublic__construct( $descendantFont) : void

Object constructor

Parameters
NameTypeDescription
$descendantFont
methodpublicdecodeString(string $string, string $charEncoding) : string

Convert string from the font encoding.

The method is used to convert strings retrieved from existing content streams
Parameters
NameTypeDescription
$stringstring
$charEncodingstring

Character encoding of resulting text.

Returns
TypeDescription
string
methodpublicencodeString(string $string, string $charEncoding) : string

Convert string to the font encoding.

The method is used to prepare string for text drawing operators
Parameters
NameTypeDescription
$stringstring
$charEncodingstring

Character encoding of source text.

Returns
TypeDescription
string
methodpublicgetCoveredPercentage(string $string, string $charEncoding = '') : float

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.
Parameters
NameTypeDescription
$stringstring
$charEncodingstring

(optional) Character encoding of source text. If omitted, uses 'current locale'.

Returns
TypeDescription
float
methodprivategetToUnicodeCMapData() : string
static

Generate ToUnicode character map data

Returns
TypeDescription
string
methodpublicglyphNumberForCharacter(integer $characterCode) : integer

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
Parameters
NameTypeDescription
$characterCodeinteger

Unicode character code (code point).

Returns
TypeDescription
integerGlyph number.
methodpublicglyphNumbersForCharacters(array $characterCodes) : array

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()}.
Parameters
NameTypeDescription
$characterCodesarray

Array of Unicode character codes (code points).

Returns
TypeDescription
arrayArray of glyph numbers.
methodpublicwidthForGlyph(integer $glyphNumber) : integer

Returns the width of the glyph.

Like {@link widthsForGlyphs()} but used for one glyph at a time.
Parameters
NameTypeDescription
$glyphNumberinteger
Returns
TypeDescription
integer
Throws
ExceptionDescription
\Zend_Pdf_Exception
methodpublicwidthsForGlyphs( $glyphNumbers) : array

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()}.
Parameters
NameTypeDescription
$glyphNumbers
Returns
TypeDescription
arrayArray of glyph widths (integers).
Throws
ExceptionDescription
\Zend_Pdf_Exception
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