Store Thumbnails with image hashes

This drastically improves the time it takes to select a dive
with several pictures at the expense of longer startup and
bigger hash files.

Signed-off-by: Robert C. Helling <helling@atdotde.de>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/subsurface-core/qthelper.cpp b/subsurface-core/qthelper.cpp
index 40c507a7e..63248f6c4 100644
--- a/subsurface-core/qthelper.cpp
+++ b/subsurface-core/qthelper.cpp
@@ -1129,6 +1129,7 @@ extern "C" void reverseGeoLookup(degrees_t latitude, degrees_t longitude, uint32
 QHash<QString, QByteArray> hashOf;
 QMutex hashOfMutex;
 QHash<QByteArray, QString> localFilenameOf;
+QHash <QString, QImage > thumbnailCache;
 
 extern "C" char * hashstring(char * filename)
 {
@@ -1152,6 +1153,7 @@ void read_hashes()
 		QDataStream stream(&hashfile);
 		stream >> localFilenameOf;
 		stream >> hashOf;
+		stream >> thumbnailCache;
 		hashfile.close();
 	}
 }
@@ -1163,6 +1165,7 @@ void write_hashes()
 		QDataStream stream(&hashfile);
 		stream << localFilenameOf;
 		stream << hashOf;
+		stream << thumbnailCache;
 		hashfile.commit();
 	} else {
 		qDebug() << "cannot open" << hashfile.fileName();