您可以使用 BitmapData 类的copyPixels()方法来实现这种结果。为此,您需要使用Loader
. 加载图像时,您有两个Bitmap
对象。从那里,您可以访问BitmapData
每个对应的Bitmap
并可以将它们拼接在一起。
拼接后,您Bitmap
从组合的BitmapData
. 然后你将组合Bitmap
提供给其他一些组件。不幸的是, aCanvas
不会接受 aBitmap
的backgroundImage
风格。但是您可以将组合添加Bitmap
到 aUIComponent
或将其设置为source
组件的Image
。
最后,将UIComponent
或添加Image
到Canvas
. 由于您可以Canvas
在Canvas
.
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical"
minWidth="955" minHeight="600"
creationComplete="onCreationComplete()">
<mx:Script>
<![CDATA[
import mx.containers.Canvas;
import mx.controls.Image;
import mx.core.UIComponent;
import mx.events.FlexEvent;
private var loader1:Loader;
private var loader2:Loader;
private var bitmap1:BitmapData;
private var bitmap2:BitmapData;
protected function onCreationComplete():void
{
loader1 = new Loader();
loader1.load(new URLRequest("Android_Robot_100.png"));
loader1.contentLoaderInfo.addEventListener(Event.COMPLETE, onLoader1Complete, false,0,true);
loader2 = new Loader();
loader2.load(new URLRequest("rails.png"));
loader2.contentLoaderInfo.addEventListener(Event.COMPLETE, onLoader2Complete, false,0,true);
}
protected function onLoader1Complete(event:Event):void
{
bitmap1 = (loader1.content as Bitmap).bitmapData;
if (bitmap1 && bitmap2)
copyPixels();
}
private function onLoader2Complete(event:Event):void
{
bitmap2 = (loader2.content as Bitmap).bitmapData;
if (bitmap1 && bitmap2)
copyPixels();
}
protected function copyPixels():void
{
// false = non-transparent background
var combined:BitmapData = new BitmapData(200,200, false);
var sourceRect1:Rectangle = new Rectangle(0,0,bitmap1.width, bitmap1.height);
var sourceRect2:Rectangle = new Rectangle(0,0,bitmap2.width, bitmap2.height);
combined.copyPixels(bitmap1, sourceRect1, new Point(0,0));
combined.copyPixels(bitmap2, sourceRect2, new Point(bitmap1.width, 0));
var result:Bitmap = new Bitmap(combined);
var image:Image = new Image();
image.source = result;
var canvas:Canvas = new Canvas();
canvas.addChildAt(image, 0);
addChild(canvas);
// as an alternative, just add the bitmap to a UIComponent
// note you can't do this and the above at the same time,
// becuase the 'result` Bitmap can only be the child of one
// object, adding it to one thing removes it from the other...
// var uic:UIComponent = new UIComponent();
// uic.addChild(result);
// addChild(uic);
}
]]>
</mx:Script>
</mx:Application>