qfontdatabase_qws.cpp

奇趣公司比较新的qt/emd版本

#else
        fontpath = QLatin1String("/lib/fonts");
#endif
    }

    return fontpath;
}

/*!
    \internal
*/
static void initializeDb()
{
    QFontDatabasePrivate *db = privateDb();
    if (!db || db->count)
        return;

    if (db->reregisterAppFonts) {
        db->reregisterAppFonts = false;
        for (int i = 0; i < db->applicationFonts.count(); ++i)
            if (!db->applicationFonts.at(i).families.isEmpty()) {
                registerFont(&db->applicationFonts[i]);
            }
    }

    QString fontpath = qwsFontPath();
    QString fontDirFile = fontpath + QLatin1String("/fontdir");

    if(!QFile::exists(fontpath)) {
        qFatal("QFontDatabase: Cannot find font directory %s - is Qt installed correctly?",
               fontpath.toLocal8Bit().constData());
    }

    if (db->loadFromCache(fontpath))
        return;

    QString dbFileName = qws_fontCacheDir() + QLatin1String("/fontdb");

    QFile binaryDb(dbFileName + QLatin1String(".tmp"));
    binaryDb.open(QIODevice::WriteOnly | QIODevice::Truncate);
    db->stream = new QDataStream(&binaryDb);
    *db->stream << DatabaseVersion << quint8(db->stream->version()) << fontpath;
//    qDebug() << "creating binary database at" << binaryDb.fileName();

    // Load in font definition file
    FILE* fontdef=fopen(fontDirFile.toLocal8Bit().constData(),"r");
    if (fontdef) {
        char buf[200]="";
        char name[200]="";
        char render[200]="";
        char file[200]="";
        char isitalic[10]="";
        char flags[10]="";
        do {
            fgets(buf,200,fontdef);
            if (buf[0] != '#') {
                int weight=50;
                int size=0;
                sscanf(buf,"%s %s %s %s %d %d %s",name,file,render,isitalic,&weight,&size,flags);
                QString filename;
                if (file[0] != '/')
                    filename.append(fontpath).append(QLatin1Char('/'));
                filename += QLatin1String(file);
                bool italic = isitalic[0] == 'y';
                bool smooth = QByteArray(flags).contains('s');
                if (file[0] && QFile::exists(filename))
                    db->addFont(QString::fromUtf8(name), /*foundry*/"", weight, italic, size/10, QFile::encodeName(filename), /*fileIndex*/ 0, smooth);
            }
        } while (!feof(fontdef));
        fclose(fontdef);
    }


    QDir dir(fontpath, QLatin1String("*.qpf"));
    for (int i=0; i<int(dir.count()); i++) {
        int u0 = dir[i].indexOf(QLatin1Char('_'));
        int u1 = dir[i].indexOf(QLatin1Char('_'), u0+1);
        int u2 = dir[i].indexOf(QLatin1Char('_'), u1+1);
        int u3 = dir[i].indexOf(QLatin1Char('.'), u1+1);
        if (u2 < 0) u2 = u3;

        QString familyname = dir[i].left(u0);
        int pixelSize = dir[i].mid(u0+1,u1-u0-1).toInt()/10;
        bool italic = dir[i].mid(u2-1,1) == QLatin1String("i");
        int weight = dir[i].mid(u1+1,u2-u1-1-(italic?1:0)).toInt();

        db->addFont(familyname, /*foundry*/ "qt", weight, italic, pixelSize, QFile::encodeName(dir.absoluteFilePath(dir[i])),
                    /*fileIndex*/ 0, /*antialiased*/ true);
    }

#ifndef QT_NO_FREETYPE
    dir.setNameFilters(QStringList() << QLatin1String("*.ttf")
                       << QLatin1String("*.ttc") << QLatin1String("*.pfa")
                       << QLatin1String("*.pfb"));
    dir.refresh();
    for (int i = 0; i < int(dir.count()); ++i) {
        const QByteArray file = QFile::encodeName(dir.absoluteFilePath(dir[i]));
//        qDebug() << "looking at" << file;
        db->addTTFile(file);
    }
#endif
#ifndef QT_NO_QWS_QPF2
    dir.setNameFilters(QStringList() << QLatin1String("*.qpf2"));
    dir.refresh();
    for (int i = 0; i < int(dir.count()); ++i) {
        const QByteArray file = QFile::encodeName(dir.absoluteFilePath(dir[i]));
//        qDebug() << "looking at" << file;
        db->addQPF2File(file);
    }
#endif

#ifdef QFONTDATABASE_DEBUG
    // print the database
    for (int f = 0; f < db->count; f++) {
        QtFontFamily *family = db->families[f];
        FD_DEBUG("'%s' %s", qPrintable(family->name), (family->fixedPitch ? "fixed" : ""));
#if 0
        for (int i = 0; i < QFont::LastPrivateScript; ++i) {
            FD_DEBUG("\t%s: %s", qPrintable(QFontDatabase::scriptName((QFont::Script) i)),
                     ((family->scripts[i] & QtFontFamily::Supported) ? "Supported" :
                      (family->scripts[i] & QtFontFamily::UnSupported) == QtFontFamily::UnSupported ?
                      "UnSupported" : "Unknown"));
        }
#endif

        for (int fd = 0; fd < family->count; fd++) {
            QtFontFoundry *foundry = family->foundries[fd];
            FD_DEBUG("\t\t'%s'", qPrintable(foundry->name));
            for (int s = 0; s < foundry->count; s++) {
                QtFontStyle *style = foundry->styles[s];
                FD_DEBUG("\t\t\tstyle: style=%d weight=%d\n"
                         "\t\t\tstretch=%d",
                         style->key.style, style->key.weight,
                         style->key.stretch);
                if (style->smoothScalable)
                    FD_DEBUG("\t\t\t\tsmooth scalable");
                else if (style->bitmapScalable)
                    FD_DEBUG("\t\t\t\tbitmap scalable");
                if (style->pixelSizes) {
                    FD_DEBUG("\t\t\t\t%d pixel sizes",  style->count);
                    for (int z = 0; z < style->count; ++z) {
                        QtFontSize *size = style->pixelSizes + z;
                        FD_DEBUG("\t\t\t\t  size %5d",
                                  size->pixelSize);
                    }
                }
            }
        }
    }
#endif // QFONTDATABASE_DEBUG

#ifndef QT_NO_LIBRARY
    QStringList pluginFoundries = loader()->keys();
//    qDebug() << "plugin foundries:" << pluginFoundries;
    for (int i = 0; i < pluginFoundries.count(); ++i) {
        const QString foundry(pluginFoundries.at(i));

        QFontEngineFactoryInterface *factory = qobject_cast<QFontEngineFactoryInterface *>(loader()->instance(foundry));
        if (!factory) {
            qDebug() << "Could not load plugin for foundry" << foundry;
            continue;
        }

        QList<QFontEngineInfo> fonts = factory->availableFontEngines();
        for (int i = 0; i < fonts.count(); ++i) {
            QFontEngineInfo info = fonts.at(i);

            int weight = info.weight();
            if (weight <= 0)
                weight = QFont::Normal;

            db->addFont(info.family(), foundry.toLatin1().constData(),
                        weight, info.style() != QFont::StyleNormal,
                        qRound(info.pixelSize()), /*file*/QByteArray(),
                        /*fileIndex*/0, /*antiAliased*/true,
                        info.writingSystems());
        }
    }
#endif

    // the empty string/familyname signifies the end of the font list.
    *db->stream << QString();

    {
        bool coveredWritingSystems[QFontDatabase::WritingSystemsCount] = { 0 };

        db->fallbackFamilies.clear();

        for (int i = 0; i < db->count; ++i) {
            QtFontFamily *family = db->families[i];
            bool add = false;
            if (family->count == 0)
                continue;
            if (family->bogusWritingSystems)
                continue;
            for (int ws = 1; ws < QFontDatabase::WritingSystemsCount; ++ws) {
                if (coveredWritingSystems[ws])
                    continue;
                if (family->writingSystems[ws] & QtFontFamily::Supported) {
                    coveredWritingSystems[ws] = true;
                    add = true;
                }
            }
            if (add)
                db->fallbackFamilies << family->name;
        }
        //qDebug() << "fallbacks on the server:" << db->fallbackFamilies;
        *db->stream << db->fallbackFamilies;
    }

    delete db->stream;
    db->stream = 0;
    QFile::remove(dbFileName);
    binaryDb.rename(dbFileName);
}

// called from qwindowsystem_qws.cpp
void qt_qws_init_fontdb()
{
    initializeDb();
}

#ifndef QT_NO_SETTINGS
// called from qapplication_qws.cpp
void qt_applyFontDatabaseSettings(const QSettings &settings)
{
    initializeDb();
    QFontDatabasePrivate *db = privateDb();
    for (int i = 0; i < db->count; ++i) {
        QtFontFamily *family = db->families[i];
        if (settings.contains(family->name))
            family->fallbackFamilies = settings.value(family->name).toStringList();
    }

    if (settings.contains(QLatin1String("Global Fallbacks")))
        db->fallbackFamilies = settings.value(QLatin1String("Global Fallbacks")).toStringList();
}
#endif // QT_NO_SETTINGS

static inline void load(const QString & = QString(), int = -1)
{
    initializeDb();
}

#ifndef QT_NO_FREETYPE

#if (FREETYPE_MAJOR*10000+FREETYPE_MINOR*100+FREETYPE_PATCH) >= 20105
#define X_SIZE(face,i) ((face)->available_sizes[i].x_ppem)
#define Y_SIZE(face,i) ((face)->available_sizes[i].y_ppem)
#else
#define X_SIZE(face,i) ((face)->available_sizes[i].width << 6)
#define Y_SIZE(face,i) ((face)->available_sizes[i].height << 6)
#endif

#endif // QT_NO_FREETYPE

static
QFontEngine *loadSingleEngine(int script, const QFontPrivate *fp,
                              const QFontDef &request,
                              QtFontFamily *family, QtFontFoundry *foundry,
                              QtFontStyle *style, QtFontSize *size)
{
    Q_UNUSED(script);
    Q_UNUSED(fp);
#ifdef QT_NO_FREETYPE
    Q_UNUSED(foundry);
#endif
#ifdef QT_NO_QWS_QPF
    Q_UNUSED(family);
#endif
    Q_ASSERT(size);

    int pixelSize = size->pixelSize;
    if (!pixelSize || style->smoothScalable && pixelSize == SMOOTH_SCALABLE)
        pixelSize = request.pixelSize;

#ifndef QT_NO_QWS_QPF2
    if (foundry->name == QLatin1String("prerendered")) {
        int f = ::open(size->fileName, O_RDONLY);
        if (f >= 0) {
            QFontEngineQPF *fe = new QFontEngineQPF(request, f);
            if (fe->isValid())
                return fe;
            qDebug() << "fontengine is not valid!";
            delete fe; // will close f
        }
    } else
#endif
#ifndef QT_NO_FREETYPE
    if ( foundry->name != QLatin1String("qt") ) { ///#### is this the best way????
        QString file = QFile::decodeName(size->fileName);

        QFontDef def = request;
        def.pixelSize = pixelSize;

        static bool dontShareFonts = !qgetenv("QWS_NO_SHARE_FONTS").isEmpty();
        bool shareFonts = !dontShareFonts;

        QFontEngine *engine = 0;

        if (file.isEmpty()) {
#ifndef QT_NO_LIBRARY
            QFontEngineFactoryInterface *factory = qobject_cast<QFontEngineFactoryInterface *>(loader()->instance(foundry->name));
            if (factory) {
                QFontEngineInfo info;
                info.setFamily(request.family);
                info.setPixelSize(request.pixelSize);
                info.setStyle(QFont::Style(request.style));
                info.setWeight(request.weight);
                // #### antialiased

                QAbstractFontEngine *customEngine = factory->create(info);
                if (customEngine) {
                    engine = new QProxyFontEngine(customEngine, def);

                    if (shareFonts) {
                        QVariant hint = customEngine->fontProperty(QAbstractFontEngine::CacheGlyphsHint);
                        if (hint.isValid())
                            shareFonts = hint.toBool();
                        else
                            shareFonts = (pixelSize < 64);
                    }
                }
            }
#endif // QT_NO_LIBRARY