How draw( ) handles Alpha channel values : BitmapData « Graphics « Flash / Flex / ActionScript

How draw( ) handles Alpha channel values

  import flash.display.*;
    import flash.utils.*;
  import flash.geom.*;
  import flash.text.*;
  public class Main extends Sprite{
    public function Main(){

        var redSquare:BitmapData = new BitmapData(20, 20, true, 0xFFFF0000);
        var blueSquare:BitmapData = new BitmapData(20, 20, true, 0xFF0000FF);
        var sourceRect:Rectangle = new Rectangle(5, 5, 10, 5);
        var destPoint:Point = new Point(0,0);
        redSquare.copyPixels(blueSquare, sourceRect, destPoint);
        var b:Bitmap = new Bitmap(redSquare);



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16.Assigning the Color of a Region of Pixels
17.Applying Color Transformations
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20.Adding Perlin Noise
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