QSharedPointer<QGeoTileTexture> QGeoTileCache::get(const QGeoTileSpec &spec)
{
QSharedPointer<QGeoTileTexture> tt = textureCache_.object(spec);
if (tt)
return tt;
QSharedPointer<QGeoCachedTileMemory> tm = memoryCache_.object(spec);
if (tm) {
QPixmap pixmap;
if (!pixmap.loadFromData(tm->bytes)) {
handleError(spec, QLatin1String("Problem with tile image"));
return QSharedPointer<QGeoTileTexture>(0);
}
QSharedPointer<QGeoTileTexture> tt = addToTextureCache(spec, pixmap);
if (tt)
return tt;
}
QSharedPointer<QGeoCachedTileDisk> td = diskCache_.object(spec);
if (td) {
QStringList parts = td->filename.split('.');
QFile file(td->filename);
file.open(QIODevice::ReadOnly);
QByteArray bytes = file.readAll();
file.close();
QPixmap pixmap;
const char *format = (parts.size() == 2 ? parts.at(1).toLocal8Bit().constData() : 0);
if (!pixmap.loadFromData(bytes, format)) {
handleError(spec, QLatin1String("Problem with tile image"));
return QSharedPointer<QGeoTileTexture>(0);
}
addToMemoryCache(spec, bytes, (parts.size() == 2 ? parts.at(1) : QLatin1String("")));
QSharedPointer<QGeoTileTexture> tt = addToTextureCache(td->spec, pixmap);
if (tt)
return tt;
}
return QSharedPointer<QGeoTileTexture>();
}
void QGeoTileCache::insert(const QGeoTileSpec &spec,
const QByteArray &bytes,
const QString &format,
QGeoTiledMappingManagerEngine::CacheAreas areas)
{
if (areas & QGeoTiledMappingManagerEngine::DiskCache) {
QString filename = tileSpecToFilename(spec, format, directory_);
QFile file(filename);
file.open(QIODevice::WriteOnly);
file.write(bytes);
file.close();
addToDiskCache(spec, filename);
}
if (areas & QGeoTiledMappingManagerEngine::MemoryCache) {
addToMemoryCache(spec, bytes, format);
}
/* inserts do not hit the texture cache -- this actually reduces overall
* cache hit rates because many tiles come too late to be useful
* and act as a poison */
}
