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  1. Qt
  2. QTBUG-63100

grabToImage: wrong image resolution with high dpi scaling

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    • Icon: Bug Bug
    • Resolution: Fixed
    • Icon: P3: Somewhat important P3: Somewhat important
    • 6.7
    • 5.9.0, 5.10.0 Alpha
    • Quick: Core Declarative QML
    • None
    • Samsung Galaxy S7
    • iOS/tvOS/watchOS

      When high dpi scaling is activated (QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling) then grabToImage produces a low resolution image with the size=screen_size/scaling_factor. When high dpi scaling is deactivated then the grabToImage creates an image with the correct resolution.

      import QtQuick 2.7
import QtQuick.Controls 2.0
import QtQuick.Layouts 1.3

import QtLocation 5.9
import QtPositioning 5.8

ApplicationWindow {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    Map {
        id: map
        anchors.fill: parent

        plugin: Plugin {
            name: "osm"
        }
    }

    footer: Button {
        text: "Popup"

        onClicked: map.grabToImage(function(result) {
            result.saveToFile("/storage/emulated/0/DCIM/something.png");
        });
    }
}

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            esabraha Eskil Abrahamsen Blomfeldt
            DanielSt Peter Staab
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              Created:
              Updated:
              Resolved:

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