Silverlight中称之为“效果(Effect)”的东东，在Flash里叫“滤镜(Filter)"，而且Flash里内置的滤镜要比Silverlight丰富很多，几乎所有对象都有一个filters的属性，它是一个数组，可以将一个或多个滤镜同时应用于某一对象，类似的，如果要去除已经应用的滤镜效果，只要将filters数组清空即可
01 var _data:DataProvider = new DataProvider();
02
03 _data.addItem({label:"不应用任何滤镜",data:""});
04 _data.addItem({label:"Blur(模糊滤镜)",data:"Blur"});
05 _data.addItem({label:"Drop shadow(投影滤镜)",data:"DropShadow"});
06 _data.addItem({label:"Glow(发光滤镜)",data:"Glow"});
07 _data.addItem({label:"Gradient bevel(渐变斜角滤镜)",data:"GradientBevel"});
08 _data.addItem({label:"Convolution(卷积滤镜)",data:"Convolution"});
09 _data.addItem({label:"Blur(模糊滤镜)+DropShadow(投影滤镜)",data:"Blur&DropShadow"});
10
11 cbo1.dataProvider=_data;
12
13 cbo1.addEventListener(Event.CHANGE,ChangeHandler);
14
15 function ChangeHandler(e:Event):void {
16 var _item:Object = (e.currentTarget as ComboBox).selectedItem;
17 //trace(_item.data);
18 switch (_item.data) {
19 case "Blur" :
20 img.filters=[new BlurFilter(5,5,3)];
21 break;
22 case "DropShadow" :
23 var _shadow:DropShadowFilter = new DropShadowFilter();
24 _shadow.distance=10;
25 _shadow.alpha=0.3;
26 img.filters=[_shadow];
27 break;
28 case "Glow" :
29 img.filters=[new GlowFilter(0xffff99,0.5,40,40,3,1,false)];
30 break;
31 case "GradientBevel" :
32 var bgColor:uint=0xCCCCCC;
33 var size:uint=80;
34 var offset:uint=50;
35 var distance:Number=5;
36 var angleInDegrees:Number=225;// opposite 45 degrees
37 var colors:Array=[0xFFFFFF,0xCCCCCC,0x000000];
38 var alphas:Array=[1,0.1,1];
39 var ratios:Array=[0,128,255];
40 var blurX:Number=8;
41 var blurY:Number=8;
42 var strength:Number=2;
43 var quality:Number=BitmapFilterQuality.HIGH;
44 var type:String=BitmapFilterType.FULL;
45 var knockout:Boolean=false;
46
47 img.filters = [new GradientBevelFilter(distance,
48 angleInDegrees,
49 colors,
50 alphas,
51 ratios,
52 blurX,
53 blurY,
54 strength,
55 quality,
56 type,
57 knockout)];
58 break;
59 case "Convolution" :
60 var clamp:Boolean=false;
61 var clampColor:Number=0xFF0000;
62 var clampAlpha:Number=1;
63 var bias:Number=0;
64 var preserveAlpha:Boolean=false;
65 var matrixCols:Number=3;
66 var matrixRows:Number=3;
67 var matrix:Array = [ 1,1,1,
68 1,1,1,
69 1,1,1 ];
70
71 var filter:ConvolutionFilter=new ConvolutionFilter(matrixCols,matrixRows,matrix,matrix.length,bias,preserveAlpha,clamp,clampColor,clampAlpha);
72
73 img.filters=[filter];
74 break;
75 case "Blur&DropShadow" :
76 var _shadow2:DropShadowFilter = new DropShadowFilter();
77 _shadow2.distance=10;
78 _shadow2.alpha=0.3;
79 img.filters=[new BlurFilter(5,5,3),_shadow2];
80 break;
81 case "" :
82 default :
83 img.filters=[];
84 break;
85 }
86
87 }
01 package {
02 import flash.display.Sprite;
03 import flash.events.Event;
04 import flash.filters.DropShadowFilter;
05 import flash.filters.BlurFilter;
06 public class DynamicFilter extends Sprite {
07
08 private var dropShadowFilter:DropShadowFilter;
09 private var blurFilter:BlurFilter;
10
11
12 public function DynamicFilter() {
13 init();
14 }
15
16 private function init():void {
17 //注：mm是舞台上的一个图片实例
18 mm.x = stage.stageWidth/2;
19 mm.y = stage.stageHeight/2;
20
21 dropShadowFilter = new DropShadowFilter();
22 dropShadowFilter.alpha = 0.3;
23 blurFilter = new BlurFilter();
24
25 addEventListener(Event.ENTER_FRAME, EnterFrameHandler);
26 }
27
28 private function EnterFrameHandler(event:Event):void {
29 var dx:Number = mouseX - mm.x;
30 var dy:Number = mouseY - mm.y;
31 dropShadowFilter.distance = - Math.sqrt(dx*dx+dy*dy)/10;
32 dropShadowFilter.angle = Math.atan2(dy,dx)*180/Math.PI;
33 blurFilter.blurX = Math.abs(dx)/30;
34 blurFilter.blurY = Math.abs(dy)/30;
35 mm.filters = [blurFilter,dropShadowFilter];
36 }
37 }
38 }