QImage

[mickey]

hi,
anyone know what can be the reason why sometimes this don't load the image and appear warning?

QImage img("");	
cout << "text file name " << texFileName << endl; 
//this above print the name  "file.jpg"; it print same thing when load works and when dosn't work!!
if ( !img.load(texFileName)) 
               qWarning( "Could not read image file ONE ");

QImage img("");	
cout << "text file name " << texFileName << endl; 
//this above print the name  "file.jpg"; it print same thing when load works and when dosn't work!!
if ( !img.load(texFileName)) 
               qWarning( "Could not read image file ONE ");

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[jacek]

Do you use absolute paths?

[mickey]

no i don't; the path printed is "image/imm.png";

[jacek]

no i don't;

Then use them. If you run your program from a different directory, it won't be able to find that image.

You can use QApplication::applicationDirPath() to construct an absolute path.

[mickey]

I change its position and texNameFIle ="../dir/image.png"

dir/myApp/images
dir/other/image.png

dir/myApp/images
dir/other/image.png

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now it's working; under images directory doesn't work...

[jacek]

now it's working; under images directory doesn't work...

Does it work with absolute paths?

Do you use PNG or JPEG images?

[mickey]

Does it work with absolute paths?

I didin't try it; now it works with path above; maybe I changed the dir App in some place....?!

Do you use PNG or JPEG images?

both them.....thanks

[jacek]

maybe I changed the dir App in some place....?!

Relative paths are relative to current directory, which might change depending on how you start your program.

both them....

If JPEG images sometimes work and sometimes don't, then the problem lies in paths. If they aren't working at all, then you must make sure that you have a proper image format plugin.