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Code from Flex 4 Documentation "Using Adobe Flex 4".
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<!-- behaviors\SparkShaderBitmap.mxml -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:mx="library://ns.adobe.com/flex/mx" xmlns:s="library://ns.adobe.com/flex/spark">
<s:layout>
<s:VerticalLayout />
</s:layout>
<fx:Script>
import mx.core.BitmapAsset;
[Embed(source='a.jpg')]
[Bindable]
public var beforeImage:Class;
[Bindable]
public var beforeImageBitmap:BitmapAsset = new beforeImage();
[Embed(source='a.jpg')]
[Bindable]
public var afterImage:Class;
[Bindable]
public var afterImageBitmap:BitmapAsset = new afterImage();
</fx:Script>
<fx:Declarations>
<s:CrossFade id="forwardCF" target="{myImage}"
bitmapFrom="{beforeImageBitmap.bitmapData}" bitmapTo="{afterImageBitmap.bitmapData}"
effectEnd="myImage.source=afterImage;" />
<s:CrossFade id="backwardCF" target="{myImage}"
bitmapFrom="{afterImageBitmap.bitmapData}" bitmapTo="{beforeImageBitmap.bitmapData}"
effectEnd="myImage.source=beforeImage;" />
</fx:Declarations>
<mx:Image id="myImage" source="{beforeImage}" />
<s:Button id="fwd" label="Forward" click="forwardCF.end();forwardCF.play();" />
<s:Button id="bwd" label="Backward" click="backwardCF.end();backwardCF.play();" />
</s:Application>
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