Pdf/Resource/Image/Png.php
inherited
Classes
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 [email protected] so we can send you a copy immediately.
- 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 24593 2012-01-05 20:35:02Z matthew $
\Zend_Pdf_Resource_Image_Png
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
PNG_COMPRESSION_DEFAULT_STRATEGY
= 0
PNG_COMPRESSION_FILTERED
= 1
PNG_COMPRESSION_HUFFMAN_ONLY
= 2
PNG_COMPRESSION_RLE
= 3
PNG_FILTER_NONE
= 0
PNG_FILTER_SUB
= 1
PNG_FILTER_UP
= 2
PNG_FILTER_AVERAGE
= 3
PNG_FILTER_PAETH
= 4
PNG_INTERLACING_DISABLED
= 0
PNG_INTERLACING_ENABLED
= 1
PNG_CHANNEL_GRAY
= 0
PNG_CHANNEL_RGB
= 2
PNG_CHANNEL_INDEXED
= 3
PNG_CHANNEL_GRAY_ALPHA
= 4
PNG_CHANNEL_RGB_ALPHA
= 6
Properties
$_height = - Type
- n/a
$_imageProperties =
- Type
- n/a
\Zend_Pdf_ElementFactory_Interface $_objectFactory = Each Pdf resource (fonts, images, .
Inherited from: \Zend_Pdf_Resource::$$_objectFactory\Zend_Pdf_Resource_Image::$$_objectFactory..) interacts with a PDF itself. It creates appropriate PDF objects, structures and sometime embedded files. Resources are referenced in content streams by names, which are stored in a page resource dictionaries.
Thus, resources must be attached to the PDF.
Resource abstraction uses own PDF object factory to store all necessary information. At the render time internal object factory is appended to the global PDF file factory.
Resource abstraction also cashes information about rendered PDF files and doesn't duplicate resource description each time then Resource is rendered (referenced).
- Type
- \Zend_Pdf_ElementFactory_Interface
- Inherited_from
- \Zend_Pdf_Resource::$$_objectFactory
- Inherited_from
- \Zend_Pdf_Resource_Image::$$_objectFactory
\Zend_Pdf_Element_Object $_resource = Main resource object
Inherited from: \Zend_Pdf_Resource::$$_resource\Zend_Pdf_Resource_Image::$$_resource- Type
- \Zend_Pdf_Element_Object
- Inherited_from
- \Zend_Pdf_Resource::$$_resource
- Inherited_from
- \Zend_Pdf_Resource_Image::$$_resource
$_width =
- Type
- n/a
Methods
__clone() : voidClone page, extract it and dependent objects from the current document, so it can be used within other docs.
Inherited from: \Zend_Pdf_Resource::__clone()\Zend_Pdf_Resource_Image::__clone()__construct(string $imageFileName) : voidObject constructor
If resource is not a Zend_Pdf_Element object, then stream object with specified value is generated.
| Name | Type | Description |
|---|---|---|
| $imageFileName | string |
| Exception | Description |
|---|---|
| \Zend_Pdf_Exception |
- 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.
getPixelHeight() : integerImage height
| Type | Description |
|---|---|
| integer |
getPixelWidth() : integerImage width
| Type | Description |
|---|---|
| integer |
getProperties() : arrayImage properties
| Type | Description |
|---|---|
| array |