Uploaded image for project: 'Qt'
  1. Qt
  2. QTBUG-77637

macOS: not possible to make QWindow background transparent

    XMLWordPrintable

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
          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
          • 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
          No reviews matched the request. Check your Options in the drop-down menu of this sections header.

          Activity

            People

              vestbo Tor Arne Vestbø
              e.nemtsev Egor Nemtsev
              Votes:
              0 Vote for this issue
              Watchers:
              4 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved:

                Gerrit Reviews

                  There are no open Gerrit changes