Generate image checksum

[bunjee]

Here is what I'm doing to calculate an Image checksum :

quint16 ZePicturePool::generateChecksum(const QPixmap & pixmap)
{
	QImage image = pixmap.toImage();
	quint16 checksum = qChecksum((char *) (image.bits()), image.numBytes());
 
	return checksum;
}

quint16 ZePicturePool::generateChecksum(const QPixmap & pixmap)
{
	QImage image = pixmap.toImage();
	quint16 checksum = qChecksum((char *) (image.bits()), image.numBytes());
	
	return checksum;
}

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Is it the good approach ?