Convert drawn lines into bitmapdata - Bitmap.draw() + Sprite.graphics - wont work - actionscript-3

Question

EDIT: The convertation / copy process it self works, I just cant figure out how to tell the bitmapdata, which part of the stage to copy - I tried to solve that problem by movie the canvas to x=0 y=0 didnt show anychanges.
The only thing that showed a change was that I did move the canvas BEFORE drawing to zero, but this is totally buggy because the part of the drawing which has negativ coordinates wont be copied since the coordinate change only affect the bitmap if you do it before you start to paint
OLDER ENTRY:
I want to convert the Sprite.graphics into bitmapData, because I have a drawTool which allowes the user to paint lines, which are located inside the Sprite.grahpics I think.
I need to convert these lines to bitmapdata, because this allows me to deform them later on, but I cant use this
Bitmapdata.draw(Sprite.graphics);
And using only the Sprite instead of Sprite.graphics doesnt show any result =\
help is needed!

Answer 1

Use a matrix if you want to draw only a certain portion and from an origin other than (0,0). There's plenty in the Adobe docs on this, or a good example here:
http://www.quasimondo.com/archives/000670.php

Answer 2

Only use graphics when drawing. The actual Sprite object contains what you want, so following your convention, simply do:
BitmapData.draw(Sprite);
Although for a literal example:
var mySprite:Sprite = new Sprite();
// add lines etc using mySprite.graphics
var myBitmapData:BitmapData = new BitmapData(mySprite.width, mySprite.height);
myBitmapData.draw(mySprite);

Answer 3

I think, you've not completely understand usage BitmapData.draw().
BitmapData.draw() is a All DisplayObject(Sprite, MovieClip, Shape, Text, Video...) drawing possible. because they are have a IBitmapDrawable.(more information refer a adobe document Is the best teacher.)
If you want implement Paint Board. refer a below code. very simple Paint Board. but some help you.
try copy & paste.
import flash.display.Sprite;
import flash.events.Event;
import flash.display.BitmapData;
import flash.display.Bitmap;
import flash.events.MouseEvent;
var isDraw:Boolean = false;
var brush:Sprite =new Sprite();
brush.graphics.beginFill(0x0000ff);
brush.graphics.drawCircle(0,0,5);
brush.graphics.endFill();
var canvasData:BitmapData = new BitmapData(600,400, false);
var canvas:Bitmap = new Bitmap(canvasData);
addChild(canvas);
stage.addEventListener(MouseEvent.MOUSE_DOWN, onDrawStart);
stage.addEventListener(MouseEvent.MOUSE_UP, onDrawStop);
stage.addEventListener(Event.ENTER_FRAME, render);
function onDrawStart(e:MouseEvent):void
{
isDraw = true;
}
function onDrawStop(e:MouseEvent):void
{
isDraw = false;
}
function render(e:Event):void
{
if(!isDraw) return;
brush.x = mouseX;
brush.y = mouseY;
canvasData.draw(brush,brush.transform.matrix);
}