Flash shader滤镜的使用

import flash.net.URLLoader;
import flash.events.Event;
import flash.net.URLRequest;
import flash.display.Shader;
import flash.net.URLLoaderDataFormat;
import flash.filters.ShaderFilter;

var shader:Shader;
var i:int = 0,j:int = 0;
var loader:URLLoader=new URLLoader();
loader.addEventListener(Event.COMPLETE,onComplete);
loader.dataFormat = URLLoaderDataFormat.BINARY;
loader.load(new URLRequest("offset.pbj"));

function onComplete(e:Event):void
{
  shader = new Shader(e.target.data);
  setInterval(updata,100);
  function updata():void
  {
    j++,i++;
    shader.data.offset.value = [i,j];
    var shaderFilter:ShaderFilter = new ShaderFilter(shader);

    mc.filters = [shaderFilter];
  }



}

1, 生成了一个pbj文件。

2, offset是pbj设置的变量值。

<languageVersion : 1.0;>

kernel offset
<   namespace : "Your Namespace";
    vendor : "Your Vendor";
    version : 1;
>
{
    input image4 src;
    output pixel4 dst;
    parameter float2 offset
    <
      defaultValue:float2(0.0,0.0);
      minValue:float2(-10.0,-10.0);
      maxValue:float2(10.0,10.0);
    >;
    void
    evaluatePixel()
    {
        dst = sampleNearest(src,outCoord());
        pixel4 image=sampleNearest(src,outCoord()+offset);
        dst+=image;
        dst/=2.0;
       
       
    }
}