Embedding custom fonts in Qt 4.8.4

[itpenguin]

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

@ QStringList list;
QFontDatabase::removeAllApplicationFonts();
list << "qdsFont1.ttf" << "qdsFont2.ttf" << "qdsFont3.ttf" << "qdsFont4.ttf";
int fontID(-1);
bool fontWarningShown(false);
for (QStringList::const_iterator constIterator = list.constBegin(); constIterator != list.constEnd(); ++constIterator) {
QFile res(":/polices/" + *constIterator);
if (res.open(QIODevice::ReadOnly) == false) {
if (fontWarningShown == false) {
QMessageBox::warning(0, argv[0], (QString)"Impossible to open font file " + QChar(0x00AB) + *constIterator + QChar(0x00BB) + ".");
fontWarningShown = true;
}
} else {
fontID = QFontDatabase::addApplicationFontFromData(res.readAll());
if (fontID == -1 && fontWarningShown == false) {
QMessageBox::warning(0, argv[0], (QString)"Impossible to load " + QChar(0x00AB) + *constIterator + QChar(0x00BB) + ".");
fontWarningShown = true;
}
QStringList fntList = QFontDatabase::applicationFontFamilies ( fontID );
for (QStringList::const_iterator constIt = fntList.constBegin(); constIt != fntList.constEnd(); ++constIt) {
qDebug() << argv[0] << "QFont=" << *constIterator << "QFont=" << *constIt;
}
}
}
a.setFont(QFont("qdsFont1"),13);

#define FUNCIDENT "main"
int ps=13;
QString str="qdsfont1";
QFont testFont(str,ps);
qDebug() << FUNCIDENT << "font=" << str << "pointsize=" << ps;
QFontInfo info(testFont);
qDebug() << FUNCIDENT << "font=" << info.family() << "pixelsize=" << info.pointSize() << info.pixelSize() << info.weight() << info.exactMatch();
@

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
@/opt/qt-4.8.4-src/configure --prefix=/opt/qt-4.8.4-i386 --platform=linux-g++-32 -no-glib
-nomake demos -nomake examples -confirm-license -opensource -no-openssl -no-opengl -no-nis
-xinput -no-cups -no-dbus -no-webkit -xrender -fontconfig
@
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)@

[jazzycamel]

If you have your TTF's in a resource why use addApplicationFontFromData() at all? Why not simply do:

@
QFontDatabase.addApplicationFont(':/polices/qdsFont1.ttf')
@

I successfully add 10+ custom fonts to my application this way.

Hope this helps ;o)

[itpenguin]

Well, that makes no difference:
@ QStringList list;
QFontDatabase::removeAllApplicationFonts();
list << "qdsFont1.ttf" << "qdsFont2.ttf" << "qdsFont3.ttf" << "qdsFont4.ttf";
int fontID(-1);
bool fontWarningShown(false);
for (QStringList::const_iterator constIterator = list.constBegin(); constIterator != list.constEnd(); ++constIterator) {
QString res(":/polices/" + *constIterator);
fontID = QFontDatabase::addApplicationFont(res);
if (fontID == -1 && fontWarningShown == false) {
QMessageBox::warning(0, argv[0], (QString)"Impossible to load " + QChar(0x00AB) + *constIterator + QChar(0x00BB) + ".");
fontWarningShown = true;
}
QStringList fntList = QFontDatabase::applicationFontFamilies ( fontID );
for (QStringList::const_iterator constIt = fntList.constBegin(); constIt != fntList.constEnd(); ++constIt) {
qDebug() << argv[0] << "QFont=" << *constIterator << "QFont=" << *constIt;
}
}
a.setFont(QFont("qdsFont1"),13);

#define FUNCIDENT "main"
int ps=13;
QString str="qdsFont1";
QFont testFont(str);
qDebug() << FUNCIDENT << "font=" << str << "pointsize=" << ps;
QFontInfo info(testFont);
qDebug() << FUNCIDENT << "font=" << info.family() << "pixelsize=" << info.pointSize() << info.pixelSize() << info.weight() << info.exactMatch();
@
The shortened output of my program:
@QFont= "qdsFont1.ttf" QFont= "qdsFont1"
QFont= "qdsFont2.ttf" QFont= "qdsFont2"
QFont= "qdsFont3.ttf" QFont= "qdsFont3"
QFont= "qdsFont4.ttf" QFont= "qdsFont4"
font= "qdsFont1" pointsize= 13
font= "Arial" pixelsize= 12 12 50 false
@

As you can see:

• fonts are added to the application
• font is not used

[SGaist]

Hi,

Are you sure your font family name is correct ?

[jazzycamel]

[quote author="SGaist" date="1371123158"]Hi,

Are you sure your font family name is correct ?[/quote]

This must be correct because its being returned by QFontDatabase::applicationFontFamilies() for fontID.

Is a point size of 13 available with your font? Maybe try one of the standard sizes as returned by QFontDatabase::standardSizes(). I remember this being an issue for me as MacOSX seems to default to 13pt and I had to override it to 12pt to prevent errors with font widgets.

Hope this helps ;o)

[itpenguin]

I did not specify a point size, when creating the font ( QFont testFont(str); ).
Nevertheless the point size of font 1 is 13.

[jazzycamel]

No, but you do when settings the application font.

Anywho, stupid question, but I take it that the fonts you are loading are proven to work elsewhere? The only reason I ask is because I have just run all the steps that you have with a number of different TTF's and I can't reproduce the problem. If the fonts are freely available somewhere I can try my tests with the actual TTF's.

[itpenguin]

Well, actually the origin for my fonts are *.fon files (windows font format).
I had to translate them to ttf using fontforge.
I have no problem sending you one of these fontfiles.