[blitMask runs fine on pc slow on iOS]

This thing is confusing me I made a bmp 320*120000 and scrolled it up the stage and it was still running at a solid 60 fps with out blitMask. ... I don't get it. The whole point of me trying to use blitMask is that i thought scrolling a big bitmap would be slow , is that not a big bitmap ? because its running fine. Is it something to do with the GPU ? are blitMasks benefits only noticeable on CPU ? if this is so maybe It would still be useful for older devices ? but the problem still stands is that should using blitMask in my test make things slower ?

[blitMask runs fine on pc slow on iOS]

I just did a test in a brand new project with this code on the first frame and a symbol in the library with text field.

 

 

import flash.display.MovieClip;
import hiResStats.net.hires.debug.Stats;
import flash.display.BitmapData;
import flash.display.Bitmap;
import com.greensock.*;
import flash.events.*;

var stats:Stats = new Stats();


var holder:MovieClip = new MovieClip();
addChild(holder);
for (var i=0; i<1000; i++) {
var newitem:item = new item();
newitem.label.text=String(Math.random());
var bmp:BitmapData=new BitmapData(320,60);
bmp.draw(newitem);
var bitmap:Bitmap=new Bitmap(bmp);
bitmap.y=i*60;
holder.addChild(bitmap);
}

var blitMask:BlitMask=new BlitMask(holder,0,0,320,480,true,true);
addChild(stats);

addEventListener(Event.ENTER_FRAME,go);

function go(e:Event) {
holder.y-=10
}

 

iPhone 4s ,GPU ,full screen , 60fps

 

with blitMask on it runs at 55fps(quite noticeable) and sometimes crashes at start up

without blitMask it runs flawlessly at 60fps .

[blitMask runs fine on pc slow on iOS]

Hello and thanks for your reply , also thank you very much for your work.

I just did a test on the pc to see if my code had a problem.

I created a 320*180000 clip with out bitMask it was scrolling around 50fps with bitMask 55fps.

So I can confirm on the PC there is an improvement.

 

so its not my code. must be an iOS problem.

I guess ill have to go without .

[blitMask runs fine on pc slow on iOS]

Hi there,

Here is my code :

 

package {
	  import flash.display.MovieClip;
	  import com.greensock.*;
	  import flash.events.*;
	  public class test extends MovieClip {
				public var blitMask:BlitMask;
				public var holder:CONTENT;
				public var moving=true;
				public function test() {
						  holder = new CONTENT();
						  addChild(holder);
						  addEventListener(Event.ENTER_FRAME,update);
						  blitMask=new BlitMask(holder,0,0,320,185,true);
				}


				private function update(e:Event) {
						  if (moving) {
									holder.x+=1;
									blitMask.bitmapMode=true;
									blitMask.update();
						  } else {
									blitMask.bitmapMode=false;
						  }
				}


				public function addMoreClips(clip) {
						  holder.addChild(clip);
						  ///What shoud I do here to update the blitmask ?
				}
	  }
}

 

 

like i said this runs fine on pc but really slow on iOS .

without blitMask it is running at 60 fps on iOS with blitMask is much slower.

the content is just about 20 clips with text in each.

I am running it GPU mode and the whole movie gets scaled to the size of the screen once when starting the app.

 

what have I done wrong ?