/// <summary>
/// Serialize/deserialize index.
/// </summary>
/// <param name="index"></param>
/// <param name="position"></param>
/// <returns></returns>
private ITagsCollectionIndexReadonly SerializeDeserializeLimitedStream(ITagsCollectionIndex index, int position)
{
MemoryStream memoryStream = new MemoryStream();
memoryStream.Seek(position, SeekOrigin.Begin);
LimitedStream stream = new LimitedStream(memoryStream);
TagIndexSerializer.Serialize(stream, index);
stream.Seek(0, SeekOrigin.Begin);
return TagIndexSerializer.Deserialize(stream);
}
/// <summary>
/// Fills the given simple scene with objects inside the given view and for the given zoomFactor.
/// </summary>
/// <param name="scene"></param>
/// <param name="view"></param>
/// <param name="zoomFactor"></param>
public void Get(Scene2DSimple scene, View2D view, float zoomFactor)
{
lock (_stream) { // make sure there is only synchonous access to the stream.
// check what is in the non-simplified scene.
IScene2DPrimitivesSource simpleSource = this.GetNonSimplifiedStream ();
simpleSource.Get (scene, view, zoomFactor);
// check what index this zoomfactor is for.
int idx = this.SearchForScene (zoomFactor);
if (idx >= 0) { // the index was found.
if (!_loadedScenes.TryGetValue (idx, out simpleSource)) { // the scene was not found.
long position = _index.SceneIndexes [idx];
_stream.Seek (position, SeekOrigin.Begin);
LimitedStream stream = new LimitedStream (_stream);
//Scene2DRTreeSerializer serializer = new Scene2DRTreeSerializer(true);
//simpleSource = new Scene2DPrimitivesSource(serializer.Deserialize(stream));
OsmSharp.UI.Renderer.Scene.Storage.Styled.Scene2DStyledSerializer serializer =
new Styled.Scene2DStyledSerializer ();
simpleSource = serializer.Deserialize (stream, true);
_loadedScenes.Add (idx, simpleSource);
}
simpleSource.Get (scene, view, zoomFactor);
OsmSharp.Logging.Log.TraceEvent ("Scene2DLayeredSource", System.Diagnostics.TraceEventType.Verbose,
string.Format ("Deserialized from scene at zoom {0} and idx {1} synchronized.", zoomFactor, idx));
}
}
}
/// <summary>
/// Returns the non-simplified scene.
/// </summary>
/// <returns></returns>
private IScene2DPrimitivesSource GetNonSimplifiedStream()
{
if (_nonSimplifiedScene == null)
{
long position = _index.SceneIndexes[_index.SceneIndexes.Length - 1];
_stream.Seek(position, SeekOrigin.Begin);
LimitedStream stream = new LimitedStream(_stream);
//Scene2DRTreeSerializer serializer = new Scene2DRTreeSerializer(true);
//_nonSimplifiedScene = new Scene2DPrimitivesSource(serializer.Deserialize(stream));
OsmSharp.UI.Renderer.Scene.Storage.Styled.Scene2DStyledSerializer serializer =
new Styled.Scene2DStyledSerializer();
_nonSimplifiedScene = serializer.Deserialize(stream, true);
}
return _nonSimplifiedScene;
}
/// <summary>
/// Serialize/deserialize index.
/// </summary>
/// <param name="index"></param>
/// <param name="blockSize"></param>
/// <param name="position"></param>
/// <returns></returns>
private ITagsIndexReadonly SerializeDeserializeBlockLimitedStream(ITagsIndex index, uint blockSize, int position)
{
MemoryStream memoryStream = new MemoryStream();
memoryStream.Seek(position, SeekOrigin.Begin);
LimitedStream stream = new LimitedStream(memoryStream);
stream.Seek(position, SeekOrigin.Begin);
TagIndexSerializer.SerializeBlocks(stream, index, blockSize);
stream.Seek(position, SeekOrigin.Begin);
return TagIndexSerializer.DeserializeBlocks(stream);
}