QGraphicsScene rendering to a Pixmap

[DonCoder]

I am capturing the Pixmap at resolution 8K * 6K

1. It is taking around 2 - 3 sec for complete scene render in my case. Is there any way to improve the time
2. I think Pixmap rendering cannot be done using non Gui Thread. Its giving a crash. Any Suggessions

[JKSH]

@DonCoder said in QGraphicsScene rendering to a Pixmap:

I am capturing the Pixmap at resolution 8K * 6K

That is a very large pixmap.

QGraphicsScene/QGraphicsView uses CPU rendering, which is slow. Consider a different method that uses GPU rendering.

How are you capturing the pixmap?

I think Pixmap rendering cannot be done using non Gui Thread

That's correct. QPixmap is tied to GUI resources which are not thread-safe, so it can only be used in the GUI thread.

QImage can be used from a non-GUI thread, however.