Pdf/Resource/Font.php

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Zend Framework

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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
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Package: Zend_Pdf\Fonts

Abstract class which manages PDF fonts.

Defines the public interface and creates shared storage for concrete subclasses which are responsible for generating the font's information dictionaries, mapping characters to glyphs, and providing both overall font and glyph-specific metric data. 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
Children: \Zend_Pdf_Resource_Font_CidFont; \Zend_Pdf_Resource_Font_Extracted; \Zend_Pdf_Resource_Font_Type0; \Zend_Pdf_Resource_Font_Simple
Copyright: Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
License: New BSD License

Properties

integer $_ascent = 0

Typographical ascent. See {@link getAscent()}.

Default value0Details

Type: integer

integer $_descent = 0

Typographical descent. See {@link getDescent()}.

Default value0Details

Type: integer

array $_fontNames = array()

Array containing descriptive names for the font. See {@link fontName()}.

Default valuearray()Details

Type: array

integer $_fontType = \Zend_Pdf_Font::TYPE_UNKNOWN

The type of font. Use TYPE_ constants defined in {@link Zend_Pdf_Font}.

Default value\Zend_Pdf_Font::TYPE_UNKNOWNDetails

Type: integer

boolean $_isBold = false

Flag indicating whether or not this font is bold.

Default valuefalseDetails

Type: boolean

boolean $_isItalic = false

Flag indicating whether or not this font is italic.

Default valuefalseDetails

Type: boolean

boolean $_isMonospace = false

Flag indicating whether or not this font is monospaced.

Default valuefalseDetails

Type: boolean

integer $_lineGap = 0

Typographical line gap. See {@link getLineGap()}.

Default value0Details

Type: integer

integer $_strikePosition = 0

The position above the text baseline of the strikethrough (in glyph units).

Default value0Details

Type: integer

integer $_strikeThickness = 0

The thickness of the strikethrough (in glyph units).

Default value0Details

Type: integer

integer $_underlinePosition = 0

The position below the text baseline of the underline (in glyph units).

Default value0Details

Type: integer

integer $_underlineThickness = 0

The thickness of the underline (in glyph units).

Default value0Details

Type: integer

integer $_unitsPerEm = 0

Number of glyph units per em. See {@link getUnitsPerEm()}.

Default value0Details

Type: integer

Methods

__construct() : void

Object constructor.

__toString() : string

Returns the full name of the font in the encoding method of the current locale. Transliterates any characters that cannot be naturally represented in that character set.

Returns

Type	Description
string

decodeString(string $string, string $charEncoding) : string

abstract

Convert string from the font encoding.

The method is used to convert strings retrieved from existing content streams

Parameters

Name	Type	Description
$string	string
$charEncoding	string	Character encoding of resulting text.

Returns

Type	Description
string

encodeString(string $string, string $charEncoding) : string

abstract

Convert string to the font encoding.

The method is used to prepare string for text drawing operators

Parameters

Name	Type	Description
$string	string
$charEncoding	string	Character encoding of source text.

Returns

Type	Description
string

getAscent() : integer

Returns the typographic ascent in font glyph units.

The typographic ascent is the distance from the font's baseline to the top of the text frame. It is frequently used to locate the initial baseline for a paragraph of text inside a given rectangle.

Returns

Type	Description
integer

getCoveredPercentage(string $string, string $charEncoding = '') : float

abstract

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

Name	Type	Description
$string	string
$charEncoding	string	(optional) Character encoding of source text. If omitted, uses 'current locale'.

Returns

Type	Description
float

getDescent() : integer

Returns the typographic descent in font glyph units.

The typographic descent is the distance below the font's baseline to the bottom of the text frame. It is always negative.

Returns

Type	Description
integer

getFontName(integer $nameType, mixed $language, string $characterSet = null) : string

Returns the specified descriptive name for the font.

The font name type is usually one of the following:

{@link Zend_Pdf_Font::NAME_FULL}
{@link Zend_Pdf_Font::NAME_FAMILY}
{@link Zend_Pdf_Font::NAME_PREFERRED_FAMILY}
{@link Zend_Pdf_Font::NAME_STYLE}
{@link Zend_Pdf_Font::NAME_PREFERRED_STYLE}
{@link Zend_Pdf_Font::NAME_DESCRIPTION}
{@link Zend_Pdf_Font::NAME_SAMPLE_TEXT}
{@link Zend_Pdf_Font::NAME_ID}
{@link Zend_Pdf_Font::NAME_VERSION}
{@link Zend_Pdf_Font::NAME_POSTSCRIPT}
{@link Zend_Pdf_Font::NAME_CID_NAME}
{@link Zend_Pdf_Font::NAME_DESIGNER}
{@link Zend_Pdf_Font::NAME_DESIGNER_URL}
{@link Zend_Pdf_Font::NAME_MANUFACTURER}
{@link Zend_Pdf_Font::NAME_VENDOR_URL}
{@link Zend_Pdf_Font::NAME_COPYRIGHT}
{@link Zend_Pdf_Font::NAME_TRADEMARK}
{@link Zend_Pdf_Font::NAME_LICENSE}
{@link Zend_Pdf_Font::NAME_LICENSE_URL}

Note that not all names are available for all fonts. In addition, some fonts may contain additional names, whose indicies are in the range 256 to 32767 inclusive, which are used for certain font layout features. If the preferred language translation is not available, uses the first available translation for the name, which is usually English. If the requested name does not exist, returns null. All names are stored internally as Unicode strings, using UTF-16BE encoding. You may optionally supply a different resulting character set.

Parameters

Name	Type	Description
$nameType	integer	Type of name requested.
$language	mixed	Preferred language (string) or array of languages in preferred order. Use the ISO 639 standard 2-letter language codes.
$characterSet	string	(optional) Desired resulting character set. You may use any character set supported by {@link iconv()};

Returns

Type	Description
string

getFontNames() : array

Returns whole set of font names.

Returns

Type	Description
array

getFontType() : integer

Returns the type of font.

Returns

Type	Description
integer	One of the TYPE_ constants defined in {@link Zend_Pdf_Font}.

getLineGap() : integer

Returns the typographic line gap in font glyph units.

The typographic line gap is the distance between the bottom of the text frame of one line to the top of the text frame of the next. It is typically combined with the typographical ascent and descent to determine the font's total line height (or leading).

Returns

Type	Description
integer

getLineHeight() : integer

Returns the suggested line height (or leading) in font glyph units.

This value is determined by adding together the values of the typographic ascent, descent, and line gap. This value yields the suggested line spacing as determined by the font developer. It should be noted that this is only a guideline; layout engines will frequently modify this value to achieve special effects such as double- spacing.

Returns

Type	Description
integer

getStrikePosition() : integer

Returns the suggested position above the text baseline of the strikethrough in glyph units.

Returns

Type	Description
integer

getStrikeThickness() : integer

Returns the suggested line thickness of the strikethrough in glyph units.

Returns

Type	Description
integer

getUnderlinePosition() : integer

Returns the suggested position below the text baseline of the underline in glyph units.

This value is usually negative.

Returns

Type	Description
integer

getUnderlineThickness() : integer

Returns the suggested line thickness of the underline in glyph units.

Returns

Type	Description
integer

getUnitsPerEm() : integer

Returns the number of glyph units per em.

Used to convert glyph space to user space. Frequently used in conjunction with {@link widthsForGlyphs()} to calculate the with of a run of text.

Returns

Type	Description
integer

glyphNumberForCharacter(integer $characterCode) : integer

abstract

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.

Parameters

Name	Type	Description
$characterCode	integer	Unicode character code (code point).

Returns

Type	Description
integer	Glyph number.

glyphNumbersForCharacters(array $characterCodes) : array

abstract

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()}.

Parameters

Name	Type	Description
$characterCodes	array	Array of Unicode character codes (code points).

Returns

Type	Description
array	Array of glyph numbers.

isBold() : boolean

Returns true if font is bold.

Returns

Type	Description
boolean

isItalic() : boolean

Returns true if font is italic.

Returns

Type	Description
boolean

isMonospace() : boolean

Returns true if font is monospace.

Returns

Type	Description
boolean

widthForGlyph(integer $glyphNumber) : integer

abstract

Returns the width of the glyph.

Like {@link widthsForGlyphs()} but used for one glyph at a time.

Parameters

Name	Type	Description
$glyphNumber	integer

Returns

Type	Description
integer

Throws

Exception	Description
\Zend_Pdf_Exception

widthsForGlyphs(array $glyphNumbers) : array

abstract

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()}. See also {@link widthForGlyph()}.

Parameters

Name	Type	Description
$glyphNumbers	array	Array of glyph numbers.

Returns

Type	Description
array	Array of glyph widths (integers).

Throws

Exception	Description
\Zend_Pdf_Exception

Pdf/Resource/Font.php

\Zend_Pdf_Resource_Fontjump to top

Properties

Methods

\Zend_Pdf_Resource_Font
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