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  1. Qt
  2. QTBUG-129839

6.8: Programmatically resized window stalls for initial part of resize animation

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    • macOS
    • 72e4cb967 (dev), 8b9c25998 (6.8), a9412bca7 (dev), d59c9d6c7 (dev), 1a55bd974 (6.8)

      Reproducer attached. Click the button and the animation severely shutters (even temporarily freezes) when Window is being resized. The problem was there in 6.7.3 but the situation is much worse in 6.8.0. If you do something to the window when it's struggling with resizing, you may very well crash it.

      By far only observed on macOS. Windows is unaffected.

        1. WindowResizeTest.zip
          9 kB
        2. 6.5 threaded render loop.mov
          1.07 MB
        3. 6.5 basic render loop.mov
          992 kB
        4. 6.7 threaded render loop.mov
          1.07 MB
        5. 6.7 basic render loop.mov
          1.44 MB
        6. dev, threaded render loop.mov
          5.28 MB
        7. dev, basic render loop.mov
          2.19 MB
        8. dev, threaded render loop, QT_MTL_NO_TRANSACTION.mov
          2.13 MB
        9. image-2024-10-14-13-15-55-260.png
          image-2024-10-14-13-15-55-260.png
          526 kB
        10. image-2024-10-14-13-17-44-356.png
          image-2024-10-14-13-17-44-356.png
          577 kB
        11. image-2024-10-14-13-20-37-329.png
          image-2024-10-14-13-20-37-329.png
          573 kB
        12. image-2024-10-14-13-23-02-510.png
          image-2024-10-14-13-23-02-510.png
          573 kB
        13. screenshot-1.png
          screenshot-1.png
          3.01 MB
        14. (gpu.expert-case-config-data)
          2 kB
        15. (gpu.quicklook-preview)
          0.5 kB
        16. (gpu.shared-tab-ui-state)
          0.2 kB
        17. index
          14 kB
        18. metadata
          4 kB
        19. store0
          27 kB
        For Gerrit Dashboard: QTBUG-129839
        # Subject Branch Project Status CR V
        597766,3 macOS: Release main thread transaction block as soon as we're done with it dev qt/qtbase Status: MERGED +2 0
        598184,8 macOS: Don't stop display-link once started and window is exposed dev qt/qtbase Status: MERGED +2 0
        598369,8 Defer polishAndSync animation advance to event loop if handling expose dev qt/qtdeclarative Status: MERGED +2 0
        598611,2 macOS: Release main thread transaction block as soon as we're done with it 6.8 qt/qtbase Status: MERGED +2 0
        599380,2 Defer polishAndSync animation advance to event loop if handling expose 6.8 qt/qtdeclarative Status: MERGED +2 0

            vestbo Tor Arne Vestbø
            luqiaochen Luqiao Chen
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              Created:
              Updated:
              Resolved: