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  1. Qt
  2. QTBUG-122432

D3D11 RHI flickers black border when resizing

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    • Icon: Bug Bug
    • Resolution: Duplicate
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    • None
    • 6.5.3
    • Qt RHI
    • None
    • Windows

      Please check this video: flicker.mp4
      Steps:
      1) Set QT_WIDGETS_RHI=1 and QT_WIDGETS_RHI_BACKEND=d3d11
      2) Run linguist.exe
      3) Resize window quickly

      This can be reproduced with any Qt application when using QT_WIDGETS_RHI=1 and QT_WIDGETS_RHI_BACKEND=d3d11.
      Or adding any qml/webengine/openglwidget child to change the native window to be RHI widget.

      Windows only.
      OpenGL RHI is good.

      Qt uses DXGI_SCALING_NONE mode. It seems that the black area comes from the swap chain's background color. (i.e. IDXGISwapChain1::SetBackgroundColor, default is 0,0,0,1)

        1. flicker.mp4
          1.45 MB
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            lagocs Laszlo Agocs
            mingxiang Mingxiang Xu
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              Created:
              Updated:
              Resolved:

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