QGraphicsView performance in 2019

Hi, to dev CatchChallenger I had a problem in QWidget: I had low performance on android, 9FPS

My mix QGraphicsView + QWidget is not supported if I enable OpenGL on android and on other platform it do bug.

Then I have tested lot of stuff, QGraphicsView + OpenGL + native widget for 2D game have correct performance: 60FPS on all platform with <6% of CPU on android (and cortex A53). Then Qt via QGraphicsView seam 100% ready for game in 2019.

For webassembly and android: no windows manager, then I need remake all in one windows.


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