gistfile1.as

<?xml version="1.0" encoding="utf-8"?>
<mx:Module xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/halo" creationComplete="init()" layout="vertical" width="100%" height="100%">
        <fx:Script>
                <![CDATA[
                        import flash.filters.ShaderFilter;
                        
                        [Embed(source="assets/bicubicResampling.pbj", mimeType="application/octet-stream")]  
                        private var ResampleFilter:Class;
                            
                        
                        private function init():void{
                                var width:int = int(newWidth.text);
                                var height:int = int(newHeight.text);
                                
                                var bitmapData:BitmapData = new BitmapData(img.width, img.height);
                                bitmapData.draw(img); 
                                                                
                                var shader:Shader = new Shader(new ResampleFilter());
                                shader.data.src.input = bitmapData;
                                shader.data.scale.value = [img.width/width, img.height/height];
                                var res:BitmapData = new BitmapData(width, height);
                                var job:ShaderJob = new ShaderJob(shader);      
                                job.target = res;
                                job.addEventListener(ShaderEvent.COMPLETE, completeHandler);
                                job.start(true);      
                        }
                        
                        function completeHandler(event:ShaderEvent):void 
                        { 
                                out.removeChildAt(1);
                                out.addChild(new Bitmap(event.bitmapData));   
                        }
                        
                ]]>
        </fx:Script>
        <mx:HBox>
                <mx:VBox>
                        <mx:Image id="img" source="@Embed('assets/nikki.jpg')" />
                        <mx:Image id="out" />
                </mx:VBox>    
                
                <mx:Grid>
                        <mx:GridRow>
                                <mx:GridItem>
                                        <mx:Label text="New width" />
                                </mx:GridItem>
                                <mx:GridItem>
                                        <mx:TextInput id="newWidth" text="75" />
                                </mx:GridItem>
                        </mx:GridRow>  
                        <mx:GridRow>
                                <mx:GridItem>
                                        <mx:Label text="New height" />
                                </mx:GridItem>
                                <mx:GridItem>
                                        <mx:TextInput id="newHeight" text="75" />
                                </mx:GridItem>
                        </mx:GridRow>
                        <mx:GridRow>
                                <mx:GridItem>
                                        
                                </mx:GridItem>
                                <mx:GridItem>
                                        <mx:Button label="Resize" click="init()" />
                                </mx:GridItem>
                        </mx:GridRow>
                        
                </mx:Grid>
        </mx:HBox>
</mx:Module>