Blitmask trouble

[ekessler]

I am having trouble with using a blitmask. It is most probably newbee mistakes.

Here is my code:

 

 

var myBlitMask:BlitMask = new BlitMask(help_mc, 0, 0, stage.width, stage.height,false);

help_btn1.addEventListener(MouseEvent.CLICK, helpMove_fn1); 
function helpMove_fn1(event:MouseEvent):void {
hideHelpClose_btn ();
TweenMax.to(help_mc,1.5,{x:helpMove * 0, ease:Expo.easeOut, onStart:myBlitMask.enableBitmapMode, onUpdate:myBlitMask.update});
}

 

help_mc is 10,240 wide.

 

I get the following error:

 

ArgumentError: Error #2015: Invalid BitmapData.

at flash.display::BitmapData/ctor()

at flash.display::BitmapData()

at com.greensock::BlitMask()

at dikdukgamewithtextfile_fla::MainTimeline/onload()

at flash.events::EventDispatcher/dispatchEventFunction()

at flash.events::EventDispatcher/dispatchEvent()

at flash.net::URLLoader/onComplete()

 

What am I doing wrong?

Thanks as always.

[Carl]

My first guess would be that help_mc is too large. Flash has limitations on how much BitmapData can be stored.

 

Try the same code but make help_mc 1000px wide. If it works you you know the code is good.

 

Let us know what happens.

[GreenSock]

Yep, it sounds like you hit the memory limit in Flash - this is unrelated to BlitMask. You can replicate the problem by creating a loop that instantiates multiple large BitmapData objects and Flash will burp eventually throwing that cryptic error. I'm not aware of any workarounds besides using smaller assets that don't require so much memory.

[ekessler]

I guess that was it. When I tested it by making the mc 1000 it worked. I guess I will have to do without it.

Thanks.

[Applauz]

this isn't true... as I am using blitmask with a 25,000 pixel wide movie clip. I have seen this error when I use stage.width and stage.height in the parameters.

 

Try changing your width and height in your parameters to actual numeric values. i.e. 1024, 768

 

also .. add the smoothing parameter ,true or ,false