Unsolved cache QImage on grapics card for fast blitting?

[davecotter]

On the mac, i can cache a bitmap on the graphics card by converting it to a CGLayerRef, then blitting that into my CGContext instead of directly from my bitmap. This makes the blit much faster.

Is there an equivalent for QImage / QPainter?

looking for a solution that works on windows too.

[davecotter]

note i'm drawing into a QGraphicsView for all this. Would it be better to instead draw into a QOpenGLWidget ?