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  1. Qt
  2. QTBUG-50693

QQuickItem::grabToImage ignores scale factor

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    • Icon: Bug Bug
    • Resolution: Invalid
    • Icon: P2: Important P2: Important
    • None
    • 5.15
    • Quick: SceneGraph
    • None
    • 91e75fc34 (dev)

      QQuickItem::grabToImage always captures the item with scale factor 1, ignoring retina scale factors. For instance, if an item is drawn with 300x300 pixels on the screen on a device with scale factor 3 then grabToImage will only capture a 100x100 version of the item.

      Can be reproduced with the following QML snippet:

      import QtQuick 2.0

Text {
    width: 200;
    height: 100;
    id: root;

    function grab() {
        root.grabToImage(function(result) { result.saveToFile("grab.png"); });
    }
    
    Timer {
        interval: 500; running: true; repeat: false
        onTriggered: grab()
    }

    text: "Hello World!"
    font.pointSize: 24
}

        1. repro.tar.gz
          15 kB
        For Gerrit Dashboard: QTBUG-50693
        # Subject Branch Project Status CR V
        494129,4 QQuickDefaultTextureFactory: Support QImage with devicePixelRatio dev qt/qtdeclarative Status: NEW 0 0
        494128,4 QQuickItemGrabResult: Grab with window devicePixelRatio dev qt/qtdeclarative Status: MERGED +2 0

            janichol Andy Nichols
            DanielSt Peter Staab
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            3 Vote for this issue
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              Created:
              Updated:
              Resolved:

                There is 1 open Gerrit change