Embed 标记指示 ActionScript 编译器在它创建 SWF 文件时嵌入 Pixel Bender 内核即pbj格式文件。

您必须包含 MIME 类型声明, 如以下示例所示:

[Embed(source="channelscrambler.pbj", mimeType="application/octet-stream")]

var ChannelScramblerKernel:Class;

要使用内核, 创建一个类实例, 本例中为 ChannelScramblerFilter。以下代码使用一个嵌入的内核新建 Shader 和 ShaderFilter 对象, 它们被应用于一个 Image 实例:

<?xml version="1.0" encoding="utf-8"?>

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" applicationComplete="applyFilter()"

width="476" height="281" backgroundGradientAlphas="[1.0, 1.0]" backgroundGradientColors="[#FFFFFF, #FFFFFF]">

<mx:Script>

<![CDATA[

//Embed the PixelBender kernel in the output SWF

[Embed(source="kernels/channelscrambler.pbj", mimeType="application/octet-stream")]

private var ChannelScramblerKernel:Class;

private function applyFilter():void

{

var shader:Shader = new Shader(new ChannelScramblerKernel() );

var shaderFilter:ShaderFilter = new ShaderFilter( shader );

camellia.filters = [ shaderFilter ];

}

]]>

</mx:Script>

<mx:HBox width="410" height="100%">

<mx:VBox height="100%">

<mx:Image source="p_w_picpaths/camellia.jpg" scaleContent="false" autoLoad="true"/>

<mx:Label text="Original" width="200" textAlign="center"/>

</mx:VBox>

<mx:VBox height="100%">

<mx:Image source="p_w_picpaths/camellia.jpg" id="camellia" scaleContent="false" autoLoad="true"/>

<mx:Label text="Channel Scrambler" width="199" textAlign="center"/>

</mx:VBox>

</mx:HBox>

</mx:Application>

使用 Embed 标记通常是载入 Pixel Bender 内核最简单的方法, 但您也可以在运行时载入内核。以下示例说明如何使用 URLLoader 类载入内核:

function loadFilter()

{

var urlRequest:URLRequest = new URLRequest( "channelscrambler.pbj" );

var urlLoader:URLLoader = new URLLoader();

urlLoader.dataFormat = URLLoaderDataFormat.BINARY;

urlLoader.addEventListener( Event.COMPLETE, applyFilter );

urlLoader.load( urlRequest );

}

function applyFilter( event:Event ):void

{

trace("apply");

urlLoader.removeEventListener( Event.COMPLETE, applyFilter );

var shader:Shader = new Shader( event.target.data );

var shaderFilter:ShaderFilter = new ShaderFilter( shader );

camellia.filters = [ shaderFilter ];

}

如果需要动态设置加载的内核的值可以在加载pbj文件时断点调试查看即可