ICL and TPngEncodeData problems

[tamhanna]

Hello folks,
I have yet another problem with code taken more-less from the Symbian ICL reference.

My particular code is as follows:

        TPngEncodeData imageData= new (ELeave) TPngEncodeData;
        imageData.iBitsPerPixel=16;
        imageData.iColor=true;
        imageData.iLevel=TPngEncodeData::EDefaultCompression;
        imageData.iPaletted=false;
        
        CFrameImageData* iFrameData=CFrameImageData::NewL();
        iFrameData->AppendImageData(imageData);

It generates the following compiler errors:

..\src\mobilepaint\csaveimageao.cpp:48: function call '[TPngEncodeData].TPngEncodeData(TPngEncodeData *)' does not match
..\src\mobilepaint\csaveimageao.cpp:48: 'TPngEncodeData::TPngEncodeData()'
..\src\mobilepaint\csaveimageao.cpp:48: 'TPngEncodeData::TPngEncodeData(const TPngEncodeData &)'
..\src\mobilepaint\csaveimageao.cpp:55: function call '[CFrameImageData].AppendImageData({lval} TPngEncodeData)' does not match
..\src\mobilepaint\csaveimageao.cpp:55: 'CFrameImageData::AppendImageData(const TImageDataBlock *)' (non-static)

Errors caused tool to abort.

Does anyone of you have any ideas what is happening here? I took the code straight from the Symbian web site...

[wizard_hu_]

Follow the suggestion in http://discussion.forum.nokia.com/fo...d.php?t=158079, and read those messages.

[tamhanna]

Hi,
H have looked at the thread, but it is not related.

Could you please check the URL for me?

All the best
Tam

[A.A.M.]

Try to check params which you passes to functions. See SDK documentation:
http://www.symbian.com/developer/tec...mageData%28%29
and
http://www.symbian.com/developer/tec...DataClass.html

[symbianyucca]

And, I would also look into Symbian naming conventions, most often you should not use new operators with T-Classes, and if you do, you should then thread it as a pointer I suppose..

[lenclud]

Actually for this specific API the T class needs to be instantiated on the heap using the new operator as CFrameImageData will then assume ownership of the pointer given to AppendImageData thus causing USER 42 panics when deleting your CFrameImageData if you passed a pointer to a stack allocated object.

See: http://www.developer.nokia.com/Commu...Image_Encoding