API Documentation

Zend/Pdf/Resource/Image/Png.php

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Zend Framework

LICENSE

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Category
Zend  
Copyright
Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)  
License
New BSD License  
Package
Zend_Pdf  
Version
$Id: Png.php 24594 2012-01-05 21:27:01Z matthew $  

\Zend_Pdf_Resource_Image_Png

Package: Zend\Pdf

PNG image

Parent(s)
\Zend_Pdf_Resource_Image < \Zend_Pdf_Resource
Copyright
Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)  
License
New BSD License  

Constants

Constant  PNG_COMPRESSION_DEFAULT_STRATEGY = 0
Constant  PNG_COMPRESSION_FILTERED = 1
Constant  PNG_COMPRESSION_HUFFMAN_ONLY = 2
Constant  PNG_COMPRESSION_RLE = 3
Constant  PNG_FILTER_NONE = 0
Constant  PNG_FILTER_SUB = 1
Constant  PNG_FILTER_UP = 2
Constant  PNG_FILTER_AVERAGE = 3
Constant  PNG_FILTER_PAETH = 4
Constant  PNG_INTERLACING_DISABLED = 0
Constant  PNG_INTERLACING_ENABLED = 1
Constant  PNG_CHANNEL_GRAY = 0
Constant  PNG_CHANNEL_RGB = 2
Constant  PNG_CHANNEL_INDEXED = 3
Constant  PNG_CHANNEL_GRAY_ALPHA = 4
Constant  PNG_CHANNEL_RGB_ALPHA = 6

Properties

Propertyprotected  $_height= ''
Details
Type
Propertyprotected  $_imageProperties= ''
Details
Type
Propertyprotected  $_width= ''
Details
Type

Methods

methodpublic__construct( string $imageFileName ) : void

Object constructor

Parameters
Name Type Description
$imageFileName string
Throws
Exception Description
\Zend_Pdf_Exception
Details
Todo
Add compression conversions to support compression strategys other than PNG_COMPRESSION_DEFAULT_STRATEGY.  
Todo
Add pre-compression filtering.  
Todo
Add interlaced image handling.  
Todo
Add support for 16-bit images. Requires PDF version bump to 1.5 at least.  
Todo
Add processing for all PNG chunks defined in the spec. gAMA etc.  
Todo
Fix tRNS chunk support for Indexed Images to a SMask.  
methodpublicgetPixelHeight( ) : void

Image height

methodpublicgetPixelWidth( ) : void

Image width

methodpublicgetProperties( ) : void

Image properties

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