20#include <QAbstractNetworkCache>
24QCache<QUrl, QImage> QgsTileCache::sTileCache( 256 );
25QMutex QgsTileCache::sTileCacheMutex;
30 const QMutexLocker locker( &sTileCacheMutex );
31 sTileCache.insert( url,
new QImage( image ) );
36 QNetworkRequest req( url );
39 const QUrl adjUrl = req.url();
41 const QMutexLocker locker( &sTileCacheMutex );
43 if ( QImage *i = sTileCache.object( adjUrl ) )
52 const QByteArray imageData = data->readAll();
55 image = QImage::fromData( imageData );
59 if ( ! image.isNull( ) )
61 sTileCache.insert( adjUrl,
new QImage( image ) );
71 const QMutexLocker locker( &sTileCacheMutex );
72 return sTileCache.totalCost();
77 const QMutexLocker locker( &sTileCacheMutex );
78 return sTileCache.maxCost();
void preprocessRequest(QNetworkRequest *req) const
Preprocesses request.
static QgsNetworkAccessManager * instance(Qt::ConnectionType connectionType=Qt::BlockingQueuedConnection)
Returns a pointer to the active QgsNetworkAccessManager for the current thread.
static bool tile(const QUrl &url, QImage &image)
Try to access a tile and load it into "image" argument.
static int totalCost()
how many tiles are stored in the in-memory cache
static void insertTile(const QUrl &url, const QImage &image)
Add a tile image with given URL to the cache.
static int maxCost()
how many tiles can be stored in the in-memory cache