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  1. Qt
  2. QTBUG-77637

macOS: not possible to make QWindow background transparent

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    Details

    • Platform/s:
      macOS
    • Commits:
      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
          linux.png
          21 kB
        2. macos.png
          macos.png
          21 kB
        3. rasterwindow.zip
          9 kB

          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
          • Open

          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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            Activity

              People

              • Assignee:
                vestbo Tor Arne Vestbø
                Reporter:
                e.nemtsev Egor Nemtsev
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                Dates

                • Created:
                  Updated:
                  Resolved:

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