lukelukeluke

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 ?

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 .

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 .

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 ?