Greetings to all!
Today, I am proud of this very interesting article.
Not that the other ones are not interesting but this one beats them all from my point of view.
Have you ever thought on how to extract an image of format .png from a SWF?
With Actionscript 2.0, I personally had done it for an application using the BitmapData class and the library GD of PHP. It was certainly not very performing but it was the only way to do it at the time.
With Actionscript 3.0, we have the ByteArray class available that allows us to script a BitmapData into a ByteArray.
As my knowledge of binary programming are not sufficient to realise all of it on my own, I found on the web a script from
Adobe, which scripts a BitmapData and returns a ByteArray.
I then realised that the ByteArray was not ready to be passed to a server side script and so I asked help to a friend of mine, an engineer named
Daniele Lazzara of OrigamiStudio.it with a real virtue in informatics and a big passion for Flash. He used a codification created by
Steve Webster & dynamicflash.com to convert the ByteArray to a String and implemented a PHP script to complete the job.
Finally, I implemented a call to the PHP script from Flash and?it works wonderfully!
Read more
The result:
The main steps of Main.as, the Document Class of this project are as follow:
Properties
a BitmapData
private var bitmap_data:BitmapData;
a ByteArray
private var byte_array:ByteArray;
I instance the Adobe PNGEncoder class
var encoding:PNGEncoder;
I create a new BitmapData
bitmap_data=new BitmapData(stage.stageWidth,stage.stageHeight,fals e,0xDEDEDE);
Using the method ?draw? of the BitmapData, I take a ?screenshot? of the MovieClip that realise the drawing
bitmap_data.draw(clip);
I assign to my ByteArray a value returned by the method ?encode? of the Adobe PNGEncoder class, passing to it the BitmapData
byte_array=PNGEncoder.encode(bitmap_data);
I create a String variable and assign to it the value returned by the static method ?encodeByteArray? of the Base64 class by Steve Webster, passing to it the ByteArray
var encoded:String=Base64.encodeByteArray(byte_array);
By now, you should understand easily the rest as I send the data to the PHP script
var variables:URLVariables=new URLVariables();
variables.png=encoded;
var richiesta:URLRequest=new URLRequest();
richiesta.url='http://www.flepstudio.org/swf/mix/SWF_to_PNG/prova2.php';
richiesta.method=URLRequestMethod.POST;
richiesta.data=variables;
var loader:URLLoader=new URLLoader();
loader.dataFormat=URLLoaderDataFormat.BINARY;
Source files:
28-09-07, 06:58
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