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  1. Qt
  2. QTBUG-96465

Text's underline thickness is unstable on fractional screen's scale factors

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Details

    Description

      Text's underline thickness is unstable on fractional screen's scale factors.
      Reproduced at least on 125% screen's scale factor.

      import QtQuick 2
import QtQuick.Window 2

Window {
    width: 640
    height: 480
    visible: true

    ListView {
        anchors.fill: parent
        model: 100
        delegate: Text {
            text: "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s..."
            font.pixelSize: 16 // not reproduced on 12, 15, 18, 21, etc
            font.underline: true
            renderType: Text.NativeRendering // reproduced on Text.QtRendering as well
        }
    }
}

      Pay attention that to reproduce this on Qt 5 you need call

      QGuiApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
QGuiApplication::setHighDpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy::PassThrough);

      before creation of the application object

      Attachments

        1. 5.15.2_fontengine.txt
          3 kB
          Vladimir Belyavsky
        2. 6.2.2_fontengine.txt
          2 kB
          Vladimir Belyavsky
        3. image-2021-09-14-13-54-18-762.png
          114 kB
          Vladimir Belyavsky
        4. image-2021-12-15-20-00-37-841.png
          88 kB
          Vladimir Belyavsky
        5. image-2021-12-16-15-02-17-675.png
          12 kB
          Vladimir Belyavsky
        6. image-2021-12-16-15-03-15-998.png
          13 kB
          Vladimir Belyavsky

        Issue Links

          relates to

          Task - A task that needs to be done. QTBUG-86344 Investigate UI rendering at fractional scale factors

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

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-99266 [Qt Quick 2D Renderer] Text underlines rendering is broken on fractional screen's scale factors

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

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-86977 Qml Text underline changes on resize with fractional display scale factors

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

          Suggestion - Public suggestions QTBUG-97494 support CSS border and height on <hr>

          • Not Evaluated - Not yet evaluated/prioritized
          • Reported

          Activity

            People

              esabraha Eskil Abrahamsen Blomfeldt
              studiosus Vladimir Belyavsky
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              10 Vote for this issue
              Watchers:
              7 Start watching this issue

              Dates

                Created:
                Updated: