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  1. Qt
  2. QTBUG-58416

QtQuick Image: SVG Images are not properly scaled with High DPI Scaling

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Details

    • Bug
    • Resolution: Fixed
    • P4: Low
    • 6.2.3, 6.3.0 Alpha
    • 5.8.0
    • Quick: Core Declarative QML , SVG Support
    • None
    • * Qt 5.8.0
      * QtQuick 2.8
      * Any Device, Tested on Manjaro (normal DPI) and Android 5.1 (high DPI)
    • b6f085a275c76912862463657c2a91e35bd8936b (qt/qtdeclarative/dev) f42d4593ef3fc95a7808db4b370a0b03fb940694 (qt/qtdeclarative/6.2)

    Description

      If you use the QtQuick Image on a device with a high-DPI scaling higher than 1, and set a size for a svg image, it will be loaded for the given size, and not the real, scaled size. Simple example:

      Image {
    anchors.centerIn: parent
    source: "https://storage.googleapis.com/material-icons/external-assets/v4/icons/svg/ic_autorenew_black_24px.svg"
}

      If running on a normal display, it's fine. But on Android, for example, with the DPI-Scaling Factor 2 (automatic value), it becomes blurred, because it's loaded for 24x24 pixels, but drawn with the double resolution!

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          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-89734 The "sourceSize" property value of the "Image" item is wrong

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

          Suggestion - Public suggestions QTBUG-97450 Default sourceSize to implicit size * DPR for scalable images

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-44863 Scaled SVG degraded quality in QML

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

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-99533 SVG Icons are fuzzy on high DPI displays

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

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-81018 Image sourceSize binding causes the size to become smaller unexpectedly

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Closed
          For Gerrit Dashboard: QTBUG-58416
          # Subject Branch Project Status CR V
          351243,1 WIP: Add "devicePixelRatio" property for QQuickImageBase dev qt/qtdeclarative Status: NEW -2 0
          376579,10 Image: make default sourceSize respect DPR for scalable images dev qt/qtdeclarative Status: MERGED +2 0
          376789,1 QSvgIOHandler: support DevicePixelRatio dev qt/qtsvg Status: ABANDONED 0 0
          376791,1 WIP: Add DevicePixelRatio support to QImageReader, QImageIOHandler dev qt/qtbase Status: ABANDONED -2 0
          377213,2 Image: make default sourceSize respect DPR for scalable images 6.2 qt/qtdeclarative Status: MERGED +2 0

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            People

              mitch_curtis Mitch Curtis
              SkyCoder Felix Barz
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              Dates

                Created:
                Updated:
                Resolved:

                Gerrit Reviews