S60 3rd (N73) - image loading, CActiveScheduler

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Thu, 2007-09-06 20:32
jakubmisek
Joined: 2006-01-12
 Forum posts: 7

hi,
I'm loading image from file to CFbsBitmap (and converting to 24bit) using the code below. It works on Symbian 6 (S60 1.2), 7 (UIQ 2) - on emulator even on the real phone, BUT it works on Symbian 9.2(S60 3) on emulator only AND on Nokia N73 it crashes while starting CActiveScheduler. Its view-based application, so active scheduler is installed. Do you know where could be the problem ?

thnx for ideas

Jakub

bool   CPictureLoader::LoadPicture(const TDesC&iFileName)
{
      iStatus = KErrNone;
      CMdaImageFileToBitmapUtility* util;
      util = CMdaImageFileToBitmapUtility::NewL( *this ) ;

      util->OpenL( iFileName );
      CActiveScheduler::Start();   /* CRASH */
      if ( iStatus != KErrNone )
      {
         delete util;
         return false;
      }

      TFrameInfo frameInfo;
      util->FrameInfo( 0, frameInfo );
     
      if ( KErrNone != iCurrentBitmap.Create( frameInfo.iOverallSizeInPixels, EColor16M ) )
      {
         delete util;
         return false;
      }
     
      util->ConvertL( iCurrentBitmap );  
      CActiveScheduler::Start();
      if ( iStatus != KErrNone )
      {
         delete util;
         return false;
      }
     
      delete util;
      return true;
}
void   CPictureLoader::MiuoConvertComplete( TInt aError )
{
   iStatus = aError;
   CActiveScheduler::Stop();
}
void   CPictureLoader::MiuoCreateComplete( TInt /*aError*/ )
{
   // manual create...
}
void   CPictureLoader::MiuoOpenComplete( TInt aError )
{
   iStatus = aError;
   CActiveScheduler::Stop();
}

_________________
Jakub Misek

Thu, 2007-09-06 20:58
Mr. Buttington ...
Joined: 2004-07-10
 Forum posts: 364
Re: S60 3rd (N73) - image loading, CActiveScheduler

If you're using the applciation/eikon framework to write an application as you imply then there's no need to start and stop the active scheduler. I'm surprised it works on those over platforms/devices.

 
Thu, 2007-09-06 21:50
jakubmisek
Joined: 2006-01-12
 Forum posts: 7
Re: S60 3rd (N73) - image loading, CActiveScheduler

util->OpenL(); and util->ConvertL(); are doing asynchronous calls, so there must be some waiting for finished call. This procedure was posted even here on newLC/Image-loading-and-color-reduction

 
Thu, 2007-09-06 23:13
Mr. Buttington ...
Joined: 2004-07-10
 Forum posts: 364
Re: S60 3rd (N73) - image loading, CActiveScheduler

I didn't say anything about not waiting for finished calls, I said you shouldn't be starting and stopping the active scheuduler if your program is an application*.

From that link you gave the files only include basic header files so its not an application so that means it has to install and start an active scheduler if it wants to use active objects. If you're an application then an active scheduler is already installed and has been started for you by the framework.
The code in that link is a mess, it and your code is confused about when/when not to use active objects and how to incorporate callbacks into them and the the code.

Read the stuff about active objects and the scheduler in here
http://www.newlc.com/topic-13580

* You say its view based so I'm assuming its an app i.e. its a graphical UI using apparc and cone and eikon (or avkon etc.).
You say the scheduler is installed, if you are an app then you shouldn't install one if you are doing so explicitly.

 
Fri, 2007-09-07 07:16
Werries
Joined: 2006-09-18
 Forum posts: 68
Re: S60 3rd (N73) - image loading, CActiveScheduler

That is some depricated code, but as you used it on Symbian 6 thats understandable. You should use CActiveSchedulerWait to start and stop specific sheduling loops.
Add code like this.

class CPictureLoader
{
// This will be compiled for Symbian 8.1 and up
#ifdef EKA2
private:
    CActiveSchedulerWait *iWait;
#endif
};

Change CActiveScheduler::Start(); with

#ifdef EKA2
iWait->Start();
#else
CActiveScheduler::Start();
#endif

and CActiveScheduler::Stop(); with
#ifdef EKA2
iWait->AsyncStop();
#else
CActiveScheduler::Stop();
#endif

I'm not sure if this will work, but it's the way starting and stopping the ActiveScheduler should be done. You might try to switch to CImageDecoder, instead of CMdaImageFileToBitmapUtility.

 
Fri, 2007-09-07 21:15
jakubmisek
Joined: 2006-01-12
 Forum posts: 7
Re: S60 3rd (N73) - image loading, CActiveScheduler

its quite strange
iWait->Start(), CActiveScheduler::Start(), SetActive() /* i've switched to CImageDecoder and i'm using CActive object */ ... every of these methods are closing the application ... on another phones and on emulator its working fine.

 
Mon, 2007-09-10 15:51
Werries
Joined: 2006-09-18
 Forum posts: 68
Re: S60 3rd (N73) - image loading, CActiveScheduler

Then I think it is a problem with that specific phone, see if you can get a firmware update on that phone, can you view bitmaps in the phone's gallery? If you can get your hands on another n73, or ohter 3rd edition phone, that would show if it's a problem with the phone or your application. If you like you could send a copy of your sis file to me, and I'll check if it works on my E60(S60 3rd MR). Just send me a private msg. and I'll give you my e-mail details.

 
Mon, 2007-09-10 17:34
jakubmisek
Joined: 2006-01-12
 Forum posts: 7
Re: S60 3rd (N73) - image loading, CActiveScheduler

the phones firmware is updated, everything is working. Other Active objects and ActiveSchedulers in this application are working on this phone. I thing I have bug somewhere, but the code is to simple to be wrong. Are there some other limitations of ActiveScheduling ? I'll try it on other phones ... thank you for hints

But now I changed CMdaImageFileToBitmapUtility to CImageDecoder - and there is NEW bug Smiling (not working even on emulator) ( CImageDecoder::Convert never finishes (S60 3rd) )

 
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