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  1. Qt
  2. QTBUG-77637

macOS: not possible to make QWindow background transparent

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Details

    • macOS
    • ee82f866152a27ef7a0d69f3aa41608d4a058610 (qt/qtbase/5.12)

    Description

      When using QBackingStore to render raster in QWindow on Linux it is enough to add to constructor of child class of QWindow (as described in docs https://doc.qt.io/qt-5/qwindow.html#setFormat) :

      {
   ...

   QSurfaceFormat fmt = format(); 
   fmt.setAlphaBufferSize(8); 
   setFormat(fmt);

   create();

   ...
   //new QBackingStore(this)
}

      and background becomes transparent.

      On MacOS with the same code it is filled with gray color.

      Attachments

        1. linux.png
          21 kB
          Egor Nemtsev
        2. macos.png
          21 kB
          Egor Nemtsev
        3. rasterwindow.zip
          9 kB
          Egor Nemtsev

        Issue Links

          is required for

          Epic - Created by Jira Software - do not edit or delete. Issue type for a big user story that needs to be broken down. AUTOSUITE-1199 Integration of the Qt Safe Renderer app into the start process of the Neptune UI by systemd

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. AUTOSUITE-1183 On macOS qsr window is not transparent and not following cluster window

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Closed
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            People

              vestbo Tor Arne Vestbø
              e.nemtsev Egor Nemtsev
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              Dates

                Created:
                Updated:
                Resolved:

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