private void ApplyNewData(Context context, RasterDataDetails details)
{
// This is the start of a new frame, so the next request goes at the end
details.RequestInsertionPoint = null;
#if SingleThreaded
details.RequestQueue.ProcessQueue();
#endif
List <TileLoadRequest> tiles = new List <TileLoadRequest>();
EventHandler <MessageQueueEventArgs> handler = delegate(object sender, MessageQueueEventArgs e)
{
TileLoadRequest tile = (TileLoadRequest)e.Message;
details.LoadedTiles[tile.Tile.Identifier] = tile.Texture;
details.LoadingTiles.Remove(tile.Tile.Identifier);
tiles.Add(tile);
};
details.DoneQueue.MessageReceived += handler;
details.DoneQueue.ProcessQueue();
details.DoneQueue.MessageReceived -= handler;
foreach (TileLoadRequest tile in tiles)
{
ApplyNewTile(context, details, tile.Level, tile.Tile);
}
}
private void RequestTileLoad(RasterDataDetails details, ClipmapLevel level, RasterTile tile)
{
LinkedListNode <TileLoadRequest> requestNode;
bool exists = details.LoadingTiles.TryGetValue(tile.Identifier, out requestNode);
if (!exists)
{
// Create a new request.
TileLoadRequest request = new TileLoadRequest();
request.Level = level;
request.Tile = tile;
requestNode = new LinkedListNode <TileLoadRequest>(request);
}
lock (details.RequestList)
{
if (exists)
{
// Remove the existing request from the queue so we can re-insert it
// in its new location.
if (requestNode.List == null)
{
// Request was in the queue at one point, but it's not anymore.
// That means it's been loaded, so we don't need to do anything.
return;
}
details.RequestList.Remove(requestNode);
}
if (details.RequestInsertionPoint == null || details.RequestInsertionPoint.List == null)
{
details.RequestList.AddLast(requestNode);
}
else
{
details.RequestList.AddBefore(details.RequestInsertionPoint, requestNode);
}
details.RequestInsertionPoint = requestNode;
// If the request list has too many entries, delete from the beginning
const int MaxRequests = 500;
while (details.RequestList.Count > MaxRequests)
{
LinkedListNode <TileLoadRequest> nodeToRemove = details.RequestList.First;
details.RequestList.RemoveFirst();
details.LoadingTiles.Remove(nodeToRemove.Value.Tile.Identifier);
}
Monitor.Pulse(details.RequestList);
}
details.LoadingTiles[tile.Identifier] = requestNode;
}
private void RequestThreadEntryPoint(object state)
{
RasterDataDetails details = (RasterDataDetails)state;
details.WorkerWindow.Context.MakeCurrent();
while (true)
{
TileLoadRequest request = null;
lock (details.RequestList)
{
LinkedListNode <TileLoadRequest> lastNode = details.RequestList.Last;
if (lastNode != null)
{
request = lastNode.Value;
details.RequestList.RemoveLast();
}
else
{
Monitor.Wait(details.RequestList);
lastNode = details.RequestList.Last;
if (lastNode != null)
{
request = lastNode.Value;
details.RequestList.RemoveLast();
}
}
}
if (request != null)
{
RasterTile tile = request.Tile;
request.Texture = tile.LoadTexture();
Fence fence = Device.CreateFence();
fence.ClientWait();
details.DoneQueue.Post(request);
}
}
}
private void RequestTileLoad(RasterDataDetails details, ClipmapLevel level, RasterTile tile)
{
LinkedListNode<TileLoadRequest> requestNode;
bool exists = details.LoadingTiles.TryGetValue(tile.Identifier, out requestNode);
if (!exists)
{
// Create a new request.
TileLoadRequest request = new TileLoadRequest();
request.Level = level;
request.Tile = tile;
requestNode = new LinkedListNode<TileLoadRequest>(request);
}
lock (details.RequestList)
{
if (exists)
{
// Remove the existing request from the queue so we can re-insert it
// in its new location.
if (requestNode.List == null)
{
// Request was in the queue at one point, but it's not anymore.
// That means it's been loaded, so we don't need to do anything.
return;
}
details.RequestList.Remove(requestNode);
}
if (details.RequestInsertionPoint == null || details.RequestInsertionPoint.List == null)
{
details.RequestList.AddLast(requestNode);
}
else
{
details.RequestList.AddBefore(details.RequestInsertionPoint, requestNode);
}
details.RequestInsertionPoint = requestNode;
// If the request list has too many entries, delete from the beginning
const int MaxRequests = 500;
while (details.RequestList.Count > MaxRequests)
{
LinkedListNode<TileLoadRequest> nodeToRemove = details.RequestList.First;
details.RequestList.RemoveFirst();
details.LoadingTiles.Remove(nodeToRemove.Value.Tile.Identifier);
}
Monitor.Pulse(details.RequestList);
}
details.LoadingTiles[tile.Identifier] = requestNode;
}