[flexcoders] Re: Image Loader COMPLETE event wont fire for some images

Fri, 10 Jul 2009 19:35:37 -0700 

I think this explains it -
>From 
>http://livedocs.adobe.com/flex/gumbo/langref/flash/display/BitmapData.html:

"In AIR 1.5 and Flash Player 10, the maximum size for a BitmapData object is 
8,191 pixels in width or height, and the total number of pixels cannot exceed 
16,777,215 pixels. (So, if a BitmapData object is 8,191 pixels wide, it can 
only be 2,048 pixels high.) In Flash Player 9 and earlier and AIR 1.1 and 
earlier, the limitation is 2,880 pixels in height and 2,880 in width."

-Lance


--- In [email protected], "toofah_gm" <ga...@...> wrote:
>
> Tim,
> 
> Thanks for your help on this.  I feel like I am getting a little closer, but 
> would like to get full understanding so that I can make a good decision on 
> how to proceed.
> 
> The 2880 limit seems to be related to the problem, however it is interesting 
> that this limit only seems to affect transparent images, or at least I 
> haven't hit a limit yet for non transparent images.
> 
> Also, I am using FP10, which is supposed to have higher limits.  Do you know 
> if this is dependent on the SDK that the app is compiled with?
> 
> If I change the image to "http://www.mangumfamily.org/pedigreeLargeBook.png";, 
> which is 3764 x 2610 with transparency...it doesn't load.
> 
> "http://www.mangumfamily.org/pedigreeLargeBook2.png";, which is the same 
> image, saved at 2880 x 1997 with transparency...loads great.
> 
> "http://www.mangumfamily.org/pedigreeLargeBook3.png";, which is the same 
> image, saved at 2885 x 2000 with transparency...does not load.
> This seems to prove that there is some sort of 2880 limit still with 
> transparent images.
> 
> Interesting thing is that 
> "http://www.mangumfamily.org/backgroundOriginal.jpg";, which is much larger, 
> 4200 x 3188, but has no transparency, loads just fine.
> 
> Does anybody have some good understanding on this issue? or can you point me 
> to some better documentation on such?
> 
> Thanks!
> 
> Gary
> 
> 
> 
> --- In [email protected], "Tim Hoff" <TimHoff@> wrote:
> >
> > 
> > Well, probably a question better answered by Alex.  I suspect that the
> > transparency is adding to the file size and hitting the size limit. 
> > But, at this point, it's just a guess.  Try cropping the image down to
> > see if you get to a point that it works.
> > 
> > -TH
> > 
> > --- In [email protected], "toofah_gm" <garym@> wrote:
> > >
> > > I tried this as well...I think that the original file is actually a
> > PNG and not a JPG...unfortunately, this does not make a difference
> > either.
> > >
> > > Gary
> > >
> > >
> > > --- In [email protected], "Tim Hoff" TimHoff@ wrote:
> > > >
> > > >
> > > > What happens if you convert the jpg to a png with transparency? I
> > seem
> > > > to remember a problem with the alphas for a jpg.
> > > >
> > > > -TH
> > > >
> > > > --- In [email protected], "toofah_gm" <garym@> wrote:
> > > > >
> > > > > TH,
> > > > >
> > > > > Thanks for the quick response. If the image is too wide, why does
> > > > "http://www.mangumfamily.org/bar3.jpg"; work? It has the same
> > dimensions,
> > > > just no transparency.
> > > > >
> > > > > Gary
> > > > >
> > > > > --- In [email protected], "Tim Hoff" TimHoff@ wrote:
> > > > > >
> > > > > >
> > > > > > Hi Gary,
> > > > > >
> > > > > > There is a 2880 pixel limit for images. Your image is too wide.
> > > > > >
> > > > > > -TH
> > > > > >
> > > > > > --- In [email protected], "toofah_gm" <garym@> wrote:
> > > > > > >
> > > > > > > I am seeing cases when the image loader COMPLETE event will
> > not
> > > > fire.
> > > > > > Does anyone know why this is the case? I wonder if there is
> > > > something
> > > > > > wrong with some of my images that causes a bug in FLEX.
> > > > > > >
> > > > > > > Here is an example:
> > > > > > >
> > > > > > > <?xml version="1.0" encoding="utf-8"?>
> > > > > > > <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml";
> > > > > > layout="absolute" applicationComplete="init()">
> > > > > > > <mx:Script>
> > > > > > > <![CDATA[
> > > > > > > private function init():void
> > > > > > > {
> > > > > > > myImage.addEventListener(ProgressEvent.PROGRESS,
> > > > > > progressEventHandler);
> > > > > > > myImage.addEventListener(Event.COMPLETE,
> > completeEventHandler);
> > > > > > > myImage.addEventListener(Event.UNLOAD, unloadEventHandler);
> > > > > > >
> > > > > > > reload();
> > > > > > > }
> > > > > > >
> > > > > > > private function reload():void
> > > > > > > {
> > > > > > > //
> > > > myImage.load("http://www.google.com/intl/en_ALL/images/logo.gif";);
> > > > > > > myImage.load("http://www.mangumfamily.org/bar.jpg";);
> > > > > > > }
> > > > > > >
> > > > > > > private function progressEventHandler(evt:ProgressEvent):void
> > > > > > > {
> > > > > > > trace("PROGRESS: bytesLoaded="+evt.bytesLoaded+",
> > > > > > bytesTotal="+evt.bytesTotal);
> > > > > > > }
> > > > > > >
> > > > > > > private function completeEventHandler(evt:Event):void
> > > > > > > {
> > > > > > > trace("COMPLETE");
> > > > > > > }
> > > > > > >
> > > > > > > private function unloadEventHandler(evt:Event):void
> > > > > > > {
> > > > > > > trace("UNLOAD");
> > > > > > > }
> > > > > > > ]]>
> > > > > > > </mx:Script>
> > > > > > > <mx:Image id="myImage"/>
> > > > > > > <mx:Button label="Reload Image" y="308" click="reload()"/>
> > > > > > > </mx:Application>
> > > > > > >
> > > > > > > Notice that COMPLETE never gets called. If you copy the URL
> > into a
> > > > web
> > > > > > browser it loads fine.
> > > > > > >
> > > > > > > If you change the url in the code to the Google one, it loads
> > > > fine.
> > > > > > >
> > > > > > > What is wrong with my image? Maybe I need to log a bug to
> > FLEX.
> > > > > > >
> > > > > > > Thanks for your help!
> > > > > > >
> > > > > > > Gary
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>

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