Quote Originally Posted by ChrisW67 View Post
None that I have found. On my Linux machine attempting to create a 100k by 100k QPixmap generates an error message to the console from the underlying X library but nonetheless returns a QPixmap with the requested size and isNull() == false.
Good that you mention that... I found out that if I check against QImage::isNull, I can see when things go wrong. isNull() returns true whenever the image is too big for export, so now I can detect when the export fails. Thanks!