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Diffstat (limited to 'src/gui/text/qfontdatabase_qpa.cpp')
| -rw-r--r-- | src/gui/text/qfontdatabase_qpa.cpp | 393 |
1 files changed, 393 insertions, 0 deletions
diff --git a/src/gui/text/qfontdatabase_qpa.cpp b/src/gui/text/qfontdatabase_qpa.cpp new file mode 100644 index 0000000..19ce1be --- /dev/null +++ b/src/gui/text/qfontdatabase_qpa.cpp @@ -0,0 +1,393 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtGui module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qlibraryinfo.h" +#include <QtCore/qsettings.h> + +#include "qfontengine_qpa_p.h" +#include "qplatformdefs.h" + +#include <QtGui/private/qapplication_p.h> +#include <QtGui/qplatformfontdatabase_qpa.h> + +#include <QtCore/qmath.h> + +QT_BEGIN_NAMESPACE + +Q_GUI_EXPORT void qt_registerFont(const QString &familyName, const QString &foundryname, int weight, + QFont::Style style, int stretch, bool antialiased, bool scalable, int pixelSize, + const QSupportedWritingSystems &writingSystems, void *handle) +{ + QFontDatabasePrivate *d = privateDb(); + // qDebug() << "Adding font" << familyname << weight << italic << pixelSize << file << fileIndex << antialiased; + QtFontStyle::Key styleKey; + styleKey.style = style; + styleKey.weight = weight; + styleKey.stretch = stretch; + QtFontFamily *f = d->family(familyName, true); + + for (int i = 0; i < QFontDatabase::WritingSystemsCount; ++i) { + if (writingSystems.supported(QFontDatabase::WritingSystem(i))) { + f->writingSystems[i] = QtFontFamily::Supported; + } else { + f->writingSystems[i] = QtFontFamily::Unsupported; + } + } + + QtFontFoundry *foundry = f->foundry(foundryname, true); + QtFontStyle *fontStyle = foundry->style(styleKey, true); + fontStyle->smoothScalable = scalable; + fontStyle->antialiased = antialiased; + QtFontSize *size = fontStyle->pixelSize(pixelSize?pixelSize:SMOOTH_SCALABLE, true); + size->handle = handle; +} + +static QStringList fallbackFamilies(const QString &family, const QFont::Style &style, const QUnicodeTables::Script &script) +{ + QStringList retList = QApplicationPrivate::platformIntegration()->fontDatabase()->fallbacksForFamily(family,style,script); + QFontDatabasePrivate *db = privateDb(); + + QStringList::iterator i; + for (i = retList.begin(); i != retList.end(); ++i) { + bool contains = false; + for (int j = 0; j < db->count; j++) { + QtFontFamily *qtFamily = db->families[j]; + if (!(i->compare(qtFamily->name,Qt::CaseInsensitive))) { + contains = true; + break; + } + } + if (!contains) { + i = retList.erase(i); + i--; + } + } + return retList; +} + +static void initializeDb() +{ + static int initialized = false; + + if (!initialized) { + //init by asking for the platformfontdb for the first time :) + QApplicationPrivate::platformIntegration()->fontDatabase()->populateFontDatabase(); + initialized = true; + } +} + +#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(); +} + +static +QFontEngine *loadSingleEngine(int script, + const QFontDef &request, + QtFontFoundry *foundry, + QtFontStyle *style, QtFontSize *size) +{ + Q_UNUSED(foundry); + + Q_ASSERT(size); + int pixelSize = size->pixelSize; + if (!pixelSize || (style->smoothScalable && pixelSize == SMOOTH_SCALABLE)) + pixelSize = request.pixelSize; + + QFontDef def = request; + def.pixelSize = pixelSize; + + QFontCache::Key key(def,script); + QFontEngine *engine = QFontCache::instance()->findEngine(key); + if (!engine) { + QPlatformFontDatabase *pfdb = QApplicationPrivate::platformIntegration()->fontDatabase(); + if (size->handle) { + engine = pfdb->fontEngine(def,QUnicodeTables::Script(script),size->handle); + if (engine) { + QFontCache::Key key(def,script); + QFontCache::instance()->instance()->insertEngine(key,engine); + } + } + + } + return engine; +} + +static +QFontEngine *loadEngine(int script, const QFontDef &request, + QtFontFamily *family, QtFontFoundry *foundry, + QtFontStyle *style, QtFontSize *size) +{ + + QFontEngine *engine = loadSingleEngine(script, request, foundry, style, size); + //make sure that the db has all fallback families + if (engine + && !(request.styleStrategy & QFont::NoFontMerging) && !engine->symbol ) { + + if (family && !family->askedForFallback) { + family->fallbackFamilies = fallbackFamilies(family->name,QFont::Style(style->key.style),QUnicodeTables::Script(script)); + + family->askedForFallback = true; + } + + QStringList fallbacks = privateDb()->fallbackFamilies; + if (family && !family->fallbackFamilies.isEmpty()) + fallbacks = family->fallbackFamilies; + + engine = new QFontEngineMultiQPA(engine, script, fallbacks); + } + + return engine; +} + +static void registerFont(QFontDatabasePrivate::ApplicationFont *fnt) +{ + QFontDatabasePrivate *db = privateDb(); + + fnt->families = QApplicationPrivate::platformIntegration()->fontDatabase()->addApplicationFont(fnt->data,fnt->fileName); + + db->reregisterAppFonts = true; +} + +bool QFontDatabase::removeApplicationFont(int handle) +{ + QMutexLocker locker(fontDatabaseMutex()); + + QFontDatabasePrivate *db = privateDb(); + if (handle < 0 || handle >= db->applicationFonts.count()) + return false; + + db->applicationFonts[handle] = QFontDatabasePrivate::ApplicationFont(); + + db->reregisterAppFonts = true; + db->invalidate(); + return true; +} + +bool QFontDatabase::removeAllApplicationFonts() +{ + QMutexLocker locker(fontDatabaseMutex()); + + QFontDatabasePrivate *db = privateDb(); + if (db->applicationFonts.isEmpty()) + return false; + + db->applicationFonts.clear(); + db->invalidate(); + return true; +} + +bool QFontDatabase::supportsThreadedFontRendering() +{ + return true; +} + +/*! + \internal +*/ +QFontEngine * +QFontDatabase::findFont(int script, const QFontPrivate *fp, + const QFontDef &request) +{ + QMutexLocker locker(fontDatabaseMutex()); + + const int force_encoding_id = -1; + + if (!privateDb()->count) + initializeDb(); + + QFontEngine *engine; + QFontCache::Key key(request, script); + engine = QFontCache::instance()->findEngine(key); + if (engine) { + qDebug() << "Cache hit level 1"; + return engine; + } + + QString family_name, foundry_name; + + parseFontName(request.family, foundry_name, family_name); + + if (qt_enable_test_font && request.family == QLatin1String("__Qt__Box__Engine__")) { + engine =new QTestFontEngine(request.pixelSize); + engine->fontDef = request; + } + + QtFontDesc desc; + match(script, request, family_name, foundry_name, force_encoding_id, &desc); + if (desc.family != 0 && desc.foundry != 0 && desc.style != 0) { + engine = loadEngine(script, request, desc.family, desc.foundry, desc.style, desc.size); + } else { + FM_DEBUG(" NO MATCH FOUND\n"); + } + + if (engine) { + initFontDef(desc, request, &engine->fontDef); + + if (fp) { + QFontDef def = request; + if (def.family.isEmpty()) { + def.family = fp->request.family; + def.family = def.family.left(def.family.indexOf(QLatin1Char(','))); + } + } + } + + if (!engine) { + if (!request.family.isEmpty()) { + QStringList fallbacks = fallbackFamilies(request.family,QFont::Style(request.style),QUnicodeTables::Script(script)); + for (int i = 0; i < fallbacks.size(); i++) { + QFontDef def = request; + def.family = fallbacks.at(i); + QFontCache::Key key(def,script); + engine = QFontCache::instance()->findEngine(key); + if (!engine) { + QtFontDesc desc; + match(script, def, def.family, QLatin1String(""), 0, &desc); + if (desc.family == 0 && desc.foundry == 0 && desc.style == 0) { + continue; + } + engine = loadEngine(script, def, desc.family, desc.foundry, desc.style, desc.size); + if (engine) { + initFontDef(desc, def, &engine->fontDef); + break; + } + } + } + } + + if (!engine) + engine = new QFontEngineBox(request.pixelSize); + + FM_DEBUG("returning box engine"); + } + + if (fp && fp->dpi > 0) { + engine->fontDef.pointSize = qreal(double((engine->fontDef.pixelSize * 72) / fp->dpi)); + } else { + engine->fontDef.pointSize = request.pointSize; + } + + return engine; +} + +void QFontDatabase::load(const QFontPrivate *d, int script) +{ + QFontDef req = d->request; + + if (req.pixelSize == -1) { + req.pixelSize = floor(((req.pointSize * d->dpi) / 72) * 100 + 0.5) / 100; + req.pixelSize = qRound(req.pixelSize); + } + if (req.pointSize < 0) + req.pointSize = req.pixelSize*72.0/d->dpi; + if (req.weight == 0) + req.weight = QFont::Normal; + if (req.stretch == 0) + req.stretch = 100; + + QFontCache::Key key(req, script); + + if (!d->engineData) + getEngineData(d, key); + + // the cached engineData could have already loaded the engine we want + if (d->engineData->engines[script]) + return; + + QFontEngine *fe = QFontCache::instance()->findEngine(key); + + // list of families to try + QStringList family_list; + + if (!req.family.isEmpty()) { + family_list = familyList(req); + + // add the default family + QString defaultFamily = QApplication::font().family(); + if (! family_list.contains(defaultFamily)) + family_list << defaultFamily; + + } + + // null family means find the first font matching the specified script + family_list << QString(); + + QStringList::ConstIterator it = family_list.constBegin(), end = family_list.constEnd(); + for (; !fe && it != end; ++it) { + req.family = *it; + + fe = QFontDatabase::findFont(script, d, req); + if (fe && (fe->type()==QFontEngine::Box) && !req.family.isEmpty()) + fe = 0; + } + + if (fe->symbol || (d->request.styleStrategy & QFont::NoFontMerging)) { + for (int i = 0; i < QUnicodeTables::ScriptCount; ++i) { + if (!d->engineData->engines[i]) { + d->engineData->engines[i] = fe; + fe->ref.ref(); + } + } + } else { + d->engineData->engines[script] = fe; + fe->ref.ref(); + } +} + +QT_END_NAMESPACE |