//! [0]
QImageWriter writer;
writer.setFormat("png"); // same as writer.setFormat("PNG");
//! [0]


//! [1]
QImage image("some/image.jpeg");
QImageWriter writer("images/outimage.png", "png");
writer.setText("Author", "John Smith");
writer.write(image);
//! [1]


//! [2]
QImageWriter writer(fileName);
if (writer.supportsOption(QImageIOHandler::Description))
    writer.setText("Author", "John Smith");
//! [2]