Save JPG from CDROM to PC - actionscript-3

Question

I am using following function to Save the output from SWF and send it to a PHP page so that it creates JPG, my problem if there is not INTERNET connection and the SWF is in a CDROM can the Save function be used in FLASH so that it outputs JPG and save it on a computer.
In short can we Save movieclip output as an JPG
/**
Screenshot and jpg output
**/
import flash.display.BitmapData;
import flash.geom.Matrix;
//Buttons handlers. Should add an extra function because delegate doesn't allow to pass parameters
shaF.onPress = mx.utils.Delegate.create(this,makeShadow);
//Helper functions to pass parameters
function makeShadow() { capture(0) }
/*
create a function that takes a snapshot of the Video object whenever it is called
and shows in different clips
*/
function capture(nr){
this["snapshot"+nr] = new BitmapData(abc._width,abc._height);
//the bitmap object with no transformations applied
this["snapshot"+nr].draw(abc,new Matrix());
var t:MovieClip = createEmptyMovieClip("bitmap_mc"+nr,nr);
//positions clip in correct place
//t._x = 350; t._y = 10+(nr*130); t._xscale = t._yscale = 50
//display the specified bitmap object inside the movie clip
t.attachBitmap(this["snapshot"+nr],1);
output(nr);
//attachMovie("print_but", "bot"+nr, 100+nr, {_x:t._x+t._width+50, _y:t._y+t._height/2})
}
//Create a new bitmapdata, resize it 50 %, pass image data to a server script
// using a LoadVars object (large packet)
function output(nr){
//Here we will copy pixels data
var pixels:Array = new Array()
//Create a new BitmapData
var snap = new BitmapData(this["snapshot"+nr].width, this["snapshot"+nr].height);
//Matrix to scale the new image
myMatrix = new Matrix();
myMatrix.scale(1, 1)
//Copy image
snap.draw(this["snapshot"+nr], myMatrix);
var w:Number = snap.width, tmp
var h:Number = snap.height
//Build pixels array
for(var a=0; a<=w; a++){
for(var b=0; b<=h; b++){
tmp = snap.getPixel32(a, b).toString(16)
//if(tmp == "-fcffff")
//{
//tmp="-ff0000";
//}
pixels.push(tmp.substr(1))
}
}
//Create the LoadVars object and pass data to PHP script
var output:LoadVars = new LoadVars()
output.img = pixels.toString()
output.height = h
output.width = w
//The page (and this movie itself) should be in a server to work
output.send("show.php", "output", "POST")
}
stop()

Answer 1

Since you already have the BitmapData, this is fairly easy. Modifying your output function:
//Copy image
snap.draw(this["snapshot"+nr], myMatrix);
//Now check if we want to save as JPG instead of sending data to the server
if (runningFromCdrom) {
var encoder:JPEGEncoder = new JPEGEncoder();
var bytes:ByteArray = encoder.encode(snap);
var file:FileReference = new FileReference();
file.save(bytes);
} else {
// ...the rest of your output method...
}
How to determine the runningFromCdrom value is up to you. If the SWF is being run inside an HTML document, the best way to tell if the program is being run from a CD-ROM would be to specify it in the FlashVars.

Answer 2

Yes, you can save JPEG's directly from Flash. There is no need for the intermediate step to PHP.
You can use one of these JPEG encoders:
https://github.com/mikechambers/as3corelib
http://www.switchonthecode.com/tutorials/flex-tutorial-an-asynchronous-jpeg-encoder
I would recommend the second as it can work asynchronously (kind of) which means your UI shouldn't lock up while encoding the JPEG.