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  1. Qt
  2. QTBUG-141936

Text: Inaccurate font opacity

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      In recent versions of Qt, I found that the font opacity rendering in Text component is incorrect. The transparency blending results in Qt 5.13 are more in line with expectations, both in appearance and numerically.

      Here's the code I use to demonstrate this issue:

      import QtQuick 2.12
import QtQuick.Window 2.12

Window {
    width: 256
    height: 256
    visible: true
    color: "black"
    title: qsTr("Font Opacity Test")

    Row {
        anchors.centerIn: parent

        spacing: 16

        Text {
            id: bigText
            font.family: "Arial"
            font.pixelSize: 64
            text: "BIG"
            color: "#CCFFFFFF"
            // disable subpixel antialiasing
            style: Text.Outline
            styleColor: "transparent"
        }

        Text {
            id: smallText
            anchors.baseline: bigText.baseline
            font.family: "Arial"
            font.pixelSize: 16
            text: "Small"
            color: "#CCFFFFFF"
            // disable subpixel antialiasing
            style: Text.Outline
            styleColor: "transparent"
        }
    }
}

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          inaccurate_font_opacity.png
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            esabraha Eskil Abrahamsen Blomfeldt
            gpbeta Joshua GPBeta
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              Created:
              Updated:

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