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Improved tared maps scrolling performance

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This commit is contained in:
Martin Tůma 2017-03-21 09:01:30 +01:00
parent 70ddbe192f
commit b8eede21c0
2 changed files with 8 additions and 2 deletions
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9
src/ozimap.cpp
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@ -4,6 +4,7 @@
#include <QMap>
#include <QDir>
#include <QBuffer>
#include <QPixmapCache>
#include "misc.h"
#include "rd.h"
#include "wgs84.h"
@ -348,8 +349,12 @@ void OziMap::draw(QPainter *painter, const QRectF &rect)
QPixmap pixmap;
if (_tar.isOpen()) {
QByteArray ba = _tar.file(tileName);
pixmap = QPixmap::fromImage(QImage::fromData(ba));
QString key = _tar.fileName() + "/" + tileName;
if (!QPixmapCache::find(key, &pixmap)) {
QByteArray ba = _tar.file(tileName);
pixmap = QPixmap::fromImage(QImage::fromData(ba));
QPixmapCache::insert(key, pixmap);
}
} else
pixmap = QPixmap(tileName);

1
src/tar.h
View File

@ -13,6 +13,7 @@ public:
QStringList files() const {return _index.keys();}
QByteArray file(const QString &name);
QString fileName() const {return _file.fileName();}
bool isOpen() const {return _file.isOpen();}
private: