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  1. Qt
  2. QTBUG-64229

setMask does not work well on retina due to QRegion resolving QRegion::Ellipse to rects without scale factor

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    Description

      When setting a mask on a top level window it will not display correctly on retina displays. This can be tested using the shapedclock example in qtbase/examples/widgets/widgets, the outline is not smooth, whereas on a non-retina display it is smooth.

      Attachments

        1. image-2019-12-05-16-26-35-737.png
          90 kB
          Tor Arne Vestbø
        2. image-2019-12-05-16-27-08-750.png
          28 kB
          Tor Arne Vestbø
        3. image-2019-12-06-16-20-45-931.png
          90 kB
          Tor Arne Vestbø
        4. rasterwindow_smoothmasked.png
          47 kB
          Eirik Aavitsland
        5. rasterwindow.diff
          2 kB
          Eirik Aavitsland
        6. shapedclock.diff
          1 kB
          Eirik Aavitsland

        Issue Links

          is required for

          Suggestion - Public suggestions QTBUG-71951 add QML API for window mask

          • P4: Low - Would be nice to fix, but it's not very important.
          • Reported
          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-97642 When a mask is set on a widget after being moved to a different display with a different DPR then it can end up not being set correctly because it is seen as the same as the previous one

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
          For Gerrit Dashboard: QTBUG-64229
          # Subject Branch Project Status CR V
          284086,3 Modernize shapedclock example 5.14 qt/qtbase Status: MERGED +2 0

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            People

              vestbo Tor Arne Vestbø
              andysh Andy Shaw
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              6 Vote for this issue
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              Dates

                Created:
                Updated:
                Resolved:

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