Can't save an image from a QLabel to disc

[georgiav]

Hi, I am trying to convert a QPixmap to a QImage from a QLabel named label2 , and then save the image .

QImage image;
QString imagePath = QFileDialog::getSaveFileName( this,tr("Save File"),"", tr("JPEG (*.jpg .jpeg);;PNG (.png)" ));

         QPixmap pixmap = ui->label2->pixmap();
        if (!pixmap.isNull() )
        {
             image =pixmap.toImage() ;
        }

image.save(imagePath);

This is what I've tried but it's not working, it doesn't save the image. Do you know why?

[Christian Ehrlicher]

@georgiav said in Can't save an image from a QLabel to disc:

but it's not working, it doesn't save the image.

Please be more specific - is a file generated? Is imagePath valid (with a proper extension)? Is pixmap not null? Simply add some debug output to see what exactly does not work.

[georgiav]

I checked and the imagePath is right but it seems like pixmap is null and it shouldn't be. Is that the correct way to get a QPixmap from a QLabel?

[Christian Ehrlicher]

@georgiav said in Can't save an image from a QLabel to disc:

way to get a QPixmap from a QLabel?

When you set a pixmap on the label previously, yes.

[georgiav]

@Christian-Ehrlicher

so I changed it to this:

        if (!pm.isNull() && !imagePath.isEmpty() )
        {    cout<<"rfsd";
             image =pm.toImage() ;
             image.save(imagePath);
        }

and it prints rfsd but doesn't save the image.

[Christian Ehrlicher]

@Christian-Ehrlicher said in Can't save an image from a QLabel to disc:

Is imagePath valid (with a proper extension)?

do you have write access in the selected given directory?

[georgiav]

@Christian-Ehrlicher could you please tell me how can I check that?

[SGaist]

Hi,

Go to that folder and try to create a file for example.

[georgiav]

@SGaist I tried now by naming the file image.jpeg and it works but when I name it only "image" it doesn't work even if I get the auto JPEG extention . How can I make it work in the last case?

[SGaist]

Either ensure your file name ends with the proper extension or add the format to use in the save call.

[georgiav]

@SGaist Okay, and how can I update this to save the extension?

QString imagePath = QFileDialog::getSaveFileName( this,tr("Save File"),"", tr("JPEG (*.jpg .jpeg);;PNG (.png)" ));

if I'd like the user to be able to choose if the image will be JPEG or PNG

[SGaist]

Use the selectedFilter output parameter to get the information.