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  1. Qt
  2. QTBUG-63159

QSvgGenerator does not render QSvgIconEngine based icons

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      QSvgGenerator does not render QSvgIconEngine based icons if they are drawn using QIcon::paint method. This seems to be a regression from Qt 5.8.1

      Example (from the attached project):

          QIcon icon_svg(":/test/input.svg");
    assert(!icon_svg.isNull());
    QPixmap icn_pix(icon_svg.pixmap(32));
    assert(!icn_pix.isNull());
    QSvgGenerator gen;
    gen.setViewBox(QRect(0, 0, 256, 256));
    QBuffer contents;
    gen.setOutputDevice(&contents);
    QPainter p(&gen);

    icon_svg.paint(&p, QRect(0, 0, 32, 32));  // This does not work ...
    p.drawPixmap(QRect(64, 0, 32, 32), icn_pix);  // ... but this does

    qDebug() << "devicePixelRatioF: " << p.device()->devicePixelRatioF() << "\n";

    p.end();

    qDebug() << QString::fromUtf8(contents.buffer());

      Note that QSvgGenerator has a very peculiar devicePixelRatioF of 1.52588e-05.
      This is probably the cause of this behavior because this value is multiplied into requested size by QSvgIconEngine::paint

        1. qt-svg-generator.zip
          3 kB
        For Gerrit Dashboard: QTBUG-63159
        # Subject Branch Project Status CR V
        205307,2 Return correct PdmDevicePixelRatioScaled metric 5.9 qt/qtsvg Status: MERGED +2 0

            vgt Eirik Aavitsland
            aleserjavec Ales Erjavec
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              Created:
              Updated:
              Resolved:

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