How to combine two bitmapData with blendMode?

I will simplify my case with an example:

Set 2 clips on the stage, each with a rectangle in it that have different colors. Put one on the other and apply upwards a certain blending mode that shows a visual difference. OK so what I have to do now is to capture the bitmapData both and it redraw in a single MovieClip, so what I need is to merge the bitmapData 2, which has worked well without a blendMode, but I can't make it work just with blendMode, can anyone help?

Here is the code I have so far (he located on the 1 frame of the main timeline):

import flash.display.Sprite;
import flash.display.BitmapData;
import flash.geom.Point;
import flash.display.MovieClip;
function makeTrans(targetArr:Array, container:*):void
{
 var targetBitmapDataArr:Array = [];
 var maxBitmapDataWidth:Number = 0;
 var maxBitmapDataHeight:Number = 0;
 for(var i:Number = 0; i < targetArr.length; i++){
  var target:* = targetArr[i];
  var myRectangle:Rectangle = new Rectangle(0,0,target.width,target.height);
  var myMatrix:Matrix = new Matrix();
  var myBitmapData:BitmapData = new BitmapData(target.width,target.height,true,0xFFFFFFFF);
  myBitmapData.draw(target,myMatrix,null,target.blendMode,myRectangle,false);
  targetBitmapDataArr.push(myBitmapData);
  maxBitmapDataWidth = Math.max(maxBitmapDataWidth,target.width);
  maxBitmapDataHeight = Math.max(maxBitmapDataHeight,target.height);
 }
 var finalBitmapData:BitmapData = new BitmapData(maxBitmapDataWidth,maxBitmapDataHeight,true,0xFFFFFFFF);
 var startPoint:Point = new Point(0,0);
 var mult:uint = 0x100;
 for (var j:Number = 0; j < targetBitmapDataArr.length; j++){
  finalBitmapData.merge(targetBitmapDataArr[j],targetBitmapDataArr[j].rect,startPoint,mult,mult,mult,mult);
 }
 container.graphics.clear();
 container.graphics.beginBitmapFill(finalBitmapData,null,false,false);
 container.graphics.drawRect(0,0,finalBitmapData.width,finalBitmapData.height);
 container.graphics.endFill();
}
var transition:Sprite = new Sprite();
addChild(transition);
makeTrans([mc1,mc2],transition);

If the two MovieClips are normal blendMode, it works very well, blendMode setting does not have the desired result, test and please let me know how to do this correctly. I do this for purposes of optimization, because in my real case, I have an entire Web site, I want to apply the mix mode affecting the performance of the current animations much and given that the blend mode is applied mainly background + a few decorations more on this, I think it would probably eliminate the need for permanent blendMode being all the time and just to get the result final background and then I can show only that and hide/disable everything else.

Thanks in advance!

Can you give an example more short which doesn't work as expected? I just did a little test with some bitmap icons - put the two on stage - one above the other the value mode of inverses of mixture, then a new bitmap of them... worked perfect. Here's the code I used:

var c:BitmapData = new BitmapData (32.37);
c.Draw (a);
c.Draw (b, NULL, NULL, b.blendMode);

var f: Bitmap = new Bitmap (c);
addChild (f);

First icon has an instance name, second is b... The new bitmap is exactly the same as the two on stage.

Tags: Adobe Animate

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