flash.system.JPEGLoaderContext - Adobe® Flex® 4 Language Reference (Flex 4)

Package	flash.system
Class	public class JPEGLoaderContext
Inheritance	JPEGLoaderContext LoaderContext Object

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10, AIR 1.5

The JPEGLoaderContext class includes a property for enabling a deblocking filter when loading a JPEG image. The deblocking filter improves an image's quality at higher compression settings by smoothing neighboring pixels. To apply deblocking when loading a JPEG image, create a JPEGLoaderContext object, and set its deblockingFilter property. Then use the JPEGLoaderContext object name as the value of the context parameter of the load() method of the Loader object used to load the image.

The JPEGLoaderContext class extends the LoaderContext class. Set the checkPolicyFile property to true if you need programmatic access to the pixels of the loaded image (for example, if you're using the BitmapData.draw() method). Setting the checkPolicyFile property is not necessary for AIR content running in the application sandbox.

Public Properties

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	Property		Defined By
		allowLoadBytesCodeExecution : Boolean = false Specifies whether you can use the loadBytes() method of a Loader object to load content with executable code, such as a SWF file.	LoaderContext
		applicationDomain : ApplicationDomain = null Specifies the application domain to use for the Loader.load() or Loader.loadBytes() method.	LoaderContext
		checkPolicyFile : Boolean = false Specifies whether the application should attempt to download a URL policy file from the loaded object's server before beginning to load the object itself.	LoaderContext
		constructor : Object A reference to the class object or constructor function for a given object instance.	Object
		deblockingFilter : Number = 0.0 Specifies the strength of the deblocking filter.	JPEGLoaderContext
		prototype : Object [static] A reference to the prototype object of a class or function object.	Object
		securityDomain : SecurityDomain = null Specifies the security domain to use for a Loader.load() operation.	LoaderContext

Public Methods

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	Method		Defined By
		JPEGLoaderContext(deblockingFilter:Number = 0.0, checkPolicyFile:Boolean = false, applicationDomain:ApplicationDomain = null, securityDomain:SecurityDomain = null) Creates a new JPEGLoaderContext object with the specified settings.	JPEGLoaderContext
		hasOwnProperty(name:String):Boolean Indicates whether an object has a specified property defined.	Object
		isPrototypeOf(theClass:Object):Boolean Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter.	Object
		propertyIsEnumerable(name:String):Boolean Indicates whether the specified property exists and is enumerable.	Object
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Sets the availability of a dynamic property for loop operations.	Object
		toLocaleString():String Returns the string representation of this object, formatted according to locale-specific conventions.	Object
		toString():String Returns the string representation of the specified object.	Object
		valueOf():Object Returns the primitive value of the specified object.	Object

Property Detail

deblockingFilter

property

public var deblockingFilter:Number = 0.0

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10, AIR 1.5

Specifies the strength of the deblocking filter. A value of 1.0 applies a full strength deblocking filter, a value of 0.0 disables the deblocking filter.

Constructor Detail

JPEGLoaderContext

()

Constructor

public function JPEGLoaderContext(deblockingFilter:Number = 0.0, checkPolicyFile:Boolean = false, applicationDomain:ApplicationDomain = null, securityDomain:SecurityDomain = null)

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10, AIR 1.5

Creates a new JPEGLoaderContext object with the specified settings.

Parameters

	`deblockingFilter:Number` (default = `0.0`) — Specifies the strength of the deblocking filter. A value of 1.0 applies a full strength deblocking filter, a value of 0.0 disables the deblocking filter.

	`checkPolicyFile:Boolean` (default = `false`) — Specifies whether Flash Player should check for the existence of a URL policy file before loading the object.

	`applicationDomain:ApplicationDomain` (default = `null`) — Specifies the ApplicationDomain object to use for a Loader object.

	`securityDomain:SecurityDomain` (default = `null`) — Specifies the SecurityDomain object to use for a Loader object.