Qt Embedded Font rendered as squares



  • Hi all !

    I've been developping using Qt 2.3 for a very long time and now as I switched
    to Qt 4.7, I have a small problem regarding to font rendering. I compiled Qt with
    the -prefix /usr option and, in the final target FS image, libraries are in /usr/lib
    and fonts are all in /usr/lib/fonts.

    I tried to compile the mousecalibration example and everything went fine until I
    wanted to launch the app: characters where rendered as squares. So I added
    a few lines of code to display what was happening:

    First of all I specified a default font (helvetica_120_50.qpf is present).

    @ QApplication::setFont(QFont("helvetica", 12));@

    Then I listed all the fonts available:

    @
    {
    QFontDatabase *fdb = new QFontDatabase ;
    QStringList fam = fdb->families();

        qDebug() << "QFontDatabase::Any: available font families -> " << fam.count();
        for (int i = 0 ; i < fam.count() ; i++)
        {
                qDebug() << fam[i];
        }
    }
    

    @

    Here is the output:

    QFontDatabase::Any: available font families -> 1
    "helvetica"
    .

    When I add more qpf fonts, they are all listed. However no TTF font
    (such as DejaVuSans) are listed... Not only that, but even specifying
    helvetica, which is a known font to the system, characters are still
    rendered as squares.

    After that I tried to explicitly load the DejaVuSans font:

    @
    int id = fdb->addApplicationFont("/usr/lib/fonts/DejaVuSans.ttf");
    qDebug() << "Loaded ttf font: " << id;
    @

    But the result was: "Loaded ttf font: -1"

    Does anyone know what I'm missing here ?



  • I forgot to mention that the program is run on an embedded arm
    platform with buildroot 2011-02, and that freetype is installed and
    (possibly) used by Qt.

    Please, anyone ?



  • Did you ever resolve this issue? I have a similar problem, but with Qt 5.3.



  • http://qt-project.org/doc/qt-4.8/qfontdatabase.html#addApplicationFont

    maybe this will be helpfull, doеs your system have fontconfig?
    Have you tried to addFromData ?



  • [quote author="Xooch" date="1415895249"]Did you ever resolve this issue? I have a similar problem, but with Qt 5.3.[/quote]

    This was discussed in other thread, see if this helps? "Link to other thread":http://qt-project.org/forums/viewthread/8331/



  • [quote author="Xooch" date="1415895249"]Did you ever resolve this issue? I have a similar problem, but with Qt 5.3.[/quote]

    This was discussed in other thread, see if this helps? "Link to other thread":http://qt-project.org/forums/viewthread/8331/


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