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  1. Qt
  2. QTBUG-75824

QIcon ignores high DPI setting on pixmaps

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Details

    • Bug
    • Resolution: Incomplete
    • P2: Important
    • None
    • 5.12.3, 5.15.2
    • GUI: High-DPI, GUI: Painting, Image formats
    • None
    • tested on mac with hidpi monitor
    • All

    Description

      QIcon doc suggests using files to create Hi DPI icons. but if that's not possible, because you programmatically create QPixMaps, or because your existing subsystem uses QPixMaps for everything, or any other valid reason, then it is not possible to create Hi DPI QIcons.

      When attempting to create QIcon from QPixMap, you'd expect to be able to do this:

      qPix->setDevicePixelRatio(devicePixelRatio());
      QIcon icon(qPix);

      and have the aspect ratio to be preserved in the icon, but it is not

      previously reported here, but then ignored for some reason?

      Attachments

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-44486 QIcon has problem handling high DPI pixmaps

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-90571 QIconButton does not provide high rez image when supplied

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-73587 QIcon::pixmap() double scaling when Qt::AA_UseHighDpiPixmaps set

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

            People

              sorvig Morten Sørvig
              davecotter David M. Cotter
              Veli-Pekka Heinonen Veli-Pekka Heinonen
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              Dates

                Created:
                Updated:
                Resolved:

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