// vim: set tabstop=4 shiftwidth=4 expandtab: /* Gwenview: an image viewer Copyright 2012 Aurélien Gâteau This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Cambridge, MA 02110-1301, USA. */ // Self #include "thumbnailwriter.h" // Local #include "gwenview_lib_debug.h" #include "gwenviewconfig.h" // Qt #include #include namespace Gwenview { #undef ENABLE_LOG #undef LOG // #define ENABLE_LOG #ifdef ENABLE_LOG #define LOG(x) // qCDebug(GWENVIEW_LIB_LOG) << x #else #define LOG(x) ; #endif static void storeThumbnailToDiskCache(const QString &path, const QImage &image) { if (GwenviewConfig::lowResourceUsageMode()) { return; } LOG(path); QTemporaryFile tmp(path + QStringLiteral(".gwenview.tmpXXXXXX.png")); if (!tmp.open()) { qCWarning(GWENVIEW_LIB_LOG) << "Could not create a temporary file."; return; } if (!image.save(tmp.fileName(), "png")) { qCWarning(GWENVIEW_LIB_LOG) << "Could not save thumbnail"; return; } QFile::rename(tmp.fileName(), path); } void ThumbnailWriter::queueThumbnail(const QString &path, const QImage &image) { if (GwenviewConfig::lowResourceUsageMode()) { return; } LOG(path); QMutexLocker locker(&mMutex); mCache.insert(path, image); start(); } void ThumbnailWriter::run() { QMutexLocker locker(&mMutex); while (!mCache.isEmpty() && !isInterruptionRequested()) { Cache::ConstIterator it = mCache.constBegin(); const QString path = it.key(); const QImage image = it.value(); // This part of the thread is the most time consuming but it does not // depend on mCache so we can unlock here. This way other thumbnails // can be added or queried locker.unlock(); storeThumbnailToDiskCache(path, image); locker.relock(); mCache.remove(path); } } QImage ThumbnailWriter::value(const QString &path) const { QMutexLocker locker(&mMutex); return mCache.value(path); } bool ThumbnailWriter::isEmpty() const { QMutexLocker locker(&mMutex); return mCache.isEmpty(); } } // namespace #include "moc_thumbnailwriter.cpp"