Hello,
we have problems embedding fonts in our application using QFontDatabase::addApplicationFontFromData:

Qt Code: 
  2.     QFontDatabase::removeAllApplicationFonts();
  3.     list << "qdsFont1.ttf" << "qdsFont2.ttf" << "qdsFont3.ttf" << "qdsFont4.ttf";
  4.     int fontID(-1);
  5.     bool fontWarningShown(false);
  6.     for (QStringList::const_iterator constIterator = list.constBegin(); constIterator != list.constEnd(); ++constIterator) {
  7.         QFile res(":/polices/" + *constIterator);
  8.         if (res.open(QIODevice::ReadOnly) == false) {
  9.             if (fontWarningShown == false) {
  10.                 QMessageBox::warning(0, argv[0], (QString)"Impossible to open font file " + QChar(0x00AB) + *constIterator + QChar(0x00BB) + ".");
  11.                 fontWarningShown = true;
  12.             }
  13.         } else {
  14.             fontID = QFontDatabase::addApplicationFontFromData(res.readAll());
  15.             if (fontID == -1 && fontWarningShown == false) {
  16.                 QMessageBox::warning(0, argv[0], (QString)"Impossible to load " + QChar(0x00AB) + *constIterator + QChar(0x00BB) + ".");
  17.                 fontWarningShown = true;
  18.             }
  19.             QStringList fntList = QFontDatabase::applicationFontFamilies ( fontID );
  20.             for (QStringList::const_iterator constIt = fntList.constBegin(); constIt != fntList.constEnd(); ++constIt) {
  21.                 qDebug() << argv[0] << "QFont=" << *constIterator << "QFont=" << *constIt;
  22.             }
  23.         }
  24.     }
  25.     a.setFont(QFont("qdsFont1"),13);
  26.  
  27. #define FUNCIDENT "main"
  28.     int ps=13;
  29.     QString str="qdsfont1";
  30.     QFont testFont(str,ps);
  31.     qDebug() << FUNCIDENT << "font=" << str << "pointsize=" << ps;
  32.     QFontInfo info(testFont);
  33.     qDebug() << FUNCIDENT << "font=" << info.family() << "pixelsize=" << info.pointSize() << info.pixelSize() << info.weight() << info.exactMatch();
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The fonts are stored in a qt resource file.

a.setFont() does not work. ( QApplication a(argc, argv); )

After creating the testFont QFontInfo allways tells me, that Arial is used, not my own font.

Qt 4.8.4 / Linux
created with
Qt Code: 
  1. /opt/qt-4.8.4-src/configure --prefix=/opt/qt-4.8.4-i386 --platform=linux-g++-32 -no-glib 
  2. -nomake demos -nomake examples -confirm-license -opensource -no-openssl -no-opengl -no-nis
  3. -xinput -no-cups -no-dbus -no-webkit -xrender -fontconfig
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ldd shows me that the application uses these libs:
linux-gate.so.1 => (0xffffe000)
libqwt.so.6 => /opt/qwt-6.0.2/lib/libqwt.so.6 (0xb7e40000)
libqdswidget.so => /home/qdsemu/qdsemu/home/lib/libqdswidget.so (0xb7d0a000)
libqdsemu.so.1.0.6 => /home/qdsemu/qdsemu/home/lib/libqdsemu.so.1.0.6 (0xb7d03000)
libitp.so => /home/qdsemu/qdsemu/home/lib/libitp.so (0xb7cfd000)
libXi.so.6 => /usr/X11R6/lib/libXi.so.6 (0xb7cdf000)
libQt3Support.so.4 => /opt/qt-4.8.4-i386/lib/libQt3Support.so.4 (0xb79ee000)
libQtSql.so.4 => /opt/qt-4.8.4-i386/lib/libQtSql.so.4 (0xb79ad000)
libQtXml.so.4 => /opt/qt-4.8.4-i386/lib/libQtXml.so.4 (0xb7965000)
libQtNetwork.so.4 => /opt/qt-4.8.4-i386/lib/libQtNetwork.so.4 (0xb783a000)
libQtGui.so.4 => /opt/qt-4.8.4-i386/lib/libQtGui.so.4 (0xb6d17000)
libQtCore.so.4 => /opt/qt-4.8.4-i386/lib/libQtCore.so.4 (0xb6a0a000)
libpthread.so.0 => /lib/libpthread.so.0 (0xb69f4000)
libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0xb6910000)
libm.so.6 => /lib/libm.so.6 (0xb68eb000)
libgcc_s.so.1 => /lib/libgcc_s.so.1 (0xb68e0000)
libc.so.6 => /lib/libc.so.6 (0xb67b3000)
libQtSvg.so.4 => /opt/qt-4.8.4-i386/lib/libQtSvg.so.4 (0xb675a000)
librt.so.1 => /lib/librt.so.1 (0xb6751000)
libXext.so.6 => /usr/X11R6/lib/libXext.so.6 (0xb6743000)
libX11.so.6 => /usr/X11R6/lib/libX11.so.6 (0xb664c000)
libz.so.1 => /lib/libz.so.1 (0xb6639000)
libpng12.so.0 => /usr/lib/libpng12.so.0 (0xb6615000)
libfreetype.so.6 => /usr/lib/libfreetype.so.6 (0xb65a8000)
libSM.so.6 => /usr/X11R6/lib/libSM.so.6 (0xb659f000)
libICE.so.6 => /usr/X11R6/lib/libICE.so.6 (0xb6587000)
libXrender.so.1 => /usr/X11R6/lib/libXrender.so.1 (0xb657f000)
libfontconfig.so.1 => /usr/lib/libfontconfig.so.1 (0xb6545000)
libdl.so.2 => /lib/libdl.so.2 (0xb6541000)
/lib/ld-linux.so.2 (0xb7f2d000)
libexpat.so.1 => /usr/lib/libexpat.so.1 (0xb6522000)