Exemplo n.º 1
0
QFontEngine *QBasicFontDatabase::fontEngine(const QFontDef &fontDef, QChar::Script script, void *usrPtr)
{
    QFontEngineFT *engine;
    FontFile *fontfile = static_cast<FontFile *> (usrPtr);
    QFontEngine::FaceId fid;
    fid.filename = QFile::encodeName(fontfile->fileName);
    fid.index = fontfile->indexValue;
    engine = new QFontEngineFT(fontDef);

    bool antialias = !(fontDef.styleStrategy & QFont::NoAntialias);
    QFontEngineFT::GlyphFormat format = antialias? QFontEngineFT::Format_A8 : QFontEngineFT::Format_Mono;
    if (!engine->init(fid,antialias,format)) {
        delete engine;
        engine = 0;
        return engine;
    }
    if (engine->invalid()) {
        delete engine;
        engine = 0;
    } else if (scriptRequiresOpenType(script)) {
        if (!engine->supportsScript(script)) {
            delete engine;
            engine = 0;
        }
    }

    return engine;
}
Exemplo n.º 2
0
QFontEngine *QFontconfigDatabase::fontEngine(const QFontDef &f, QChar::Script script, void *usrPtr)
{
    if (!usrPtr)
        return 0;
    QFontDef fontDef = f;

    QFontEngineFT *engine;
    FontFile *fontfile = static_cast<FontFile *> (usrPtr);
    QFontEngine::FaceId fid;
    fid.filename = QFile::encodeName(fontfile->fileName);
    fid.index = fontfile->indexValue;

    bool antialias = !(fontDef.styleStrategy & QFont::NoAntialias);
    engine = new QFontEngineFT(fontDef);

    QFontEngineFT::GlyphFormat format;
    // try and get the pattern
    FcPattern *pattern = FcPatternCreate();

    FcValue value;
    value.type = FcTypeString;
        QByteArray cs = fontDef.family.toUtf8();
    value.u.s = (const FcChar8 *)cs.data();
    FcPatternAdd(pattern,FC_FAMILY,value,true);

    value.u.s = (const FcChar8 *)fid.filename.data();
    FcPatternAdd(pattern,FC_FILE,value,true);

    value.type = FcTypeInteger;
    value.u.i = fid.index;
    FcPatternAdd(pattern,FC_INDEX,value,true);

    FcResult result;
    FcPattern *match = FcFontMatch(0, pattern, &result);
    if (match) {
        QFontEngineFT::HintStyle default_hint_style;
        if (f.hintingPreference != QFont::PreferDefaultHinting) {
            switch (f.hintingPreference) {
            case QFont::PreferNoHinting:
                default_hint_style = QFontEngineFT::HintNone;
                break;
            case QFont::PreferVerticalHinting:
                default_hint_style = QFontEngineFT::HintLight;
                break;
            case QFont::PreferFullHinting:
            default:
                default_hint_style = QFontEngineFT::HintFull;
                break;
            }
        } else {
            int hint_style = 0;
            if (FcPatternGetInteger (match, FC_HINT_STYLE, 0, &hint_style) == FcResultNoMatch)
                hint_style = QFontEngineFT::HintFull;
            switch (hint_style) {
            case FC_HINT_NONE:
                default_hint_style = QFontEngineFT::HintNone;
                break;
            case FC_HINT_SLIGHT:
                default_hint_style = QFontEngineFT::HintLight;
                break;
            case FC_HINT_MEDIUM:
                default_hint_style = QFontEngineFT::HintMedium;
                break;
            default:
                default_hint_style = QFontEngineFT::HintFull;
                break;
            }
        }

        if (antialias) {
            // If antialiasing is not fully disabled, fontconfig may still disable it on a font match basis.
            FcBool fc_antialias;
            if (FcPatternGetBool(match, FC_ANTIALIAS,0, &fc_antialias) != FcResultMatch)
                fc_antialias = true;
            antialias = fc_antialias;
        }

        if (f.hintingPreference == QFont::PreferDefaultHinting) {
            const QPlatformServices *services = QGuiApplicationPrivate::platformIntegration()->services();
            if (services && (services->desktopEnvironment() == "GNOME" || services->desktopEnvironment() == "UNITY")) {
                void *hintStyleResource =
                        QGuiApplication::platformNativeInterface()->nativeResourceForScreen("hintstyle",
                                                                                            QGuiApplication::primaryScreen());
                int hintStyle = int(reinterpret_cast<qintptr>(hintStyleResource));
                if (hintStyle > 0)
                    default_hint_style = QFontEngine::HintStyle(hintStyle - 1);
            }
        }

        engine->setDefaultHintStyle(default_hint_style);

        if (antialias) {
            QFontEngineFT::SubpixelAntialiasingType subpixelType = QFontEngineFT::Subpixel_None;
            int subpixel = FC_RGBA_NONE;

            FcPatternGetInteger(match, FC_RGBA, 0, &subpixel);
            if (subpixel == FC_RGBA_UNKNOWN)
                subpixel = FC_RGBA_NONE;

            switch (subpixel) {
                case FC_RGBA_NONE: subpixelType = QFontEngineFT::Subpixel_None; break;
                case FC_RGBA_RGB: subpixelType = QFontEngineFT::Subpixel_RGB; break;
                case FC_RGBA_BGR: subpixelType = QFontEngineFT::Subpixel_BGR; break;
                case FC_RGBA_VRGB: subpixelType = QFontEngineFT::Subpixel_VRGB; break;
                case FC_RGBA_VBGR: subpixelType = QFontEngineFT::Subpixel_VBGR; break;
                default: break;
            }

            format = subpixelType == QFontEngineFT::Subpixel_None
                        ? QFontEngineFT::Format_A8 : QFontEngineFT::Format_A32;
            engine->subpixelType = subpixelType;
        } else
            format = QFontEngineFT::Format_Mono;

        FcPatternDestroy(match);
    } else
        format = antialias ? QFontEngineFT::Format_A8 : QFontEngineFT::Format_Mono;

    FcPatternDestroy(pattern);

    if (!engine->init(fid,antialias,format)) {
        delete engine;
        engine = 0;
        return engine;
    }
    if (engine->invalid()) {
        delete engine;
        engine = 0;
    } else if (!engine->supportsScript(script)) {
        qWarning("  OpenType support missing for script %d", int(script));
        delete engine;
        engine = 0;
    }

    return engine;
}