纯 AS3 将图片转换为 SWF(转自同行“古树悬叶”的博客)

比较简单方便的通过纯 AS3 代码将图片转换为 SWF 格式，可以免去 SWFTools 需要通过命令行将 *.jpg / *.png 之类的文件转换成 *.swf。

package

{

import flash.display.Bitmap;

import flash.display.BitmapData;

import flash.display.JPEGEncoderOptions;

import flash.display.Loader;

import flash.display.LoaderInfo;

import flash.display.Sprite;

import flash.events.Event;

import flash.net.FileReference;

import flash.net.URLRequest;

import flash.utils.ByteArray;

import flash.utils.Endian;

public class Image2Swf extends Sprite

{

private var isCompress:Boolean = true;//是否为压缩格式的SWF

private var loader:Loader;

private var bitmapData:BitmapData;

public function Image2Swf()

{

loader = new Loader();

loader.contentLoaderInfo.addEventListener(Event.INIT, initHandler);

loader.load(new URLRequest("test.jpg"));

}

private function initHandler(e:Event):void

{

e.target.removeEventListener(Event.INIT, initHandler);

var bitmap:Bitmap = e.target.content
as Bitmap;

if(bitmap)

{

bitmapData = bitmap.bitmapData;

var byteArray:ByteArray = new ByteArray();

bitmapData.encode(bitmapData.rect, new JPEGEncoderOptions(),
byteArray);

loader = null;

loader = new Loader();

loader.contentLoaderInfo.addEventListener( Event.COMPLETE, completeHandler );

loader.loadBytes(byteArray);

}

}

private function completeHandler(e:Event):void

{

e.target.removeEventListener( Event.COMPLETE, completeHandler );

if(isCompress)

{

//保存为压缩格式的SWF

saveContentToSWF_compress( e );

}

else

{

//保存为非压缩格式的SWF

saveContentToSWF( e );

}

loader.unload();

loader = null;

bitmapData.dispose();

bitmapData = null;

}

//压缩格式

private function saveContentToSWF_compress( e:Event ):void

{

var swf_head:ByteArray = new ByteArray();

swf_head.endian = Endian.LITTLE_ENDIAN;

swf_head.writeBytes((e.target
as LoaderInfo).bytes, 0, 8 );

swf_head[0] = 0x43; //
'C';

swf_head.position = 0;

var swf_body:ByteArray = new ByteArray();

swf_body.endian = Endian.LITTLE_ENDIAN;

swf_body.writeBytes((e.target
as LoaderInfo).bytes, 8 );

swf_body.position = 0;

swf_body.compress();

swf_body.position = 0;

var swf_ByteArray:ByteArray = new ByteArray();//包含
head 与 body 的二进制

swf_ByteArray.writeBytes(swf_head);

swf_ByteArray.writeBytes(swf_body);

var file:FileReference = new FileReference();

file.save(swf_ByteArray, "压格式的SWF.swf");//SWF
head CWS

}

//非压缩格式

private function saveContentToSWF( e:Event ):void

{

var file:FileReference = new FileReference();

file.save((e.target
as LoaderInfo).bytes, "非压格式的SWF.swf");//SWF
head 为FWS

}

}

}