DPFPApi how to convert data_blob to qpixmap in qt5

Question

I'm currently integrating DigitalPersona U.are.U into a Qt Application. I've been able to obtain image DATA_BLOB from the DPFPApi. The only problem I have now is to preview the image by setting pixmap to a QLabel. I've tried using

QPixmap pix(QByteArray((const char*)imgBlob->pbData, imgBlob->cbData));

but that returns a null pixmap. How can I achieve that?

Answer 1

If the image is a bitmap, use the QBitmap::fromData function to create the QPixmap. It is documented here.

Or use QPixmap::loadFromData to allow Qt to attempt to detect the data format based on information in the image header.