public void EnterReadLock()
{
Lock.AcquireReaderLock();
}
// tile consumer thread
void ProcessLoadTask()
{
LoadTask?task = null;
long lastTileLoadTimeMs;
bool stop = false;
Thread ct = Thread.CurrentThread;
string ctid = "Thread[" + ct.ManagedThreadId + "]";
while (!stop && IsStarted)
{
task = null;
Monitor.Enter(tileLoadQueue);
try
{
while (tileLoadQueue.Count == 0)
{
Debug.WriteLine(ctid + " - Wait " + loadWaitCount + " - " + DateTime.Now.TimeOfDay);
if (++loadWaitCount >= GThreadPoolSize)
{
loadWaitCount = 0;
#region -- last thread takes action --
{
LastTileLoadEnd = DateTime.Now;
lastTileLoadTimeMs = (long)(LastTileLoadEnd - LastTileLoadStart).TotalMilliseconds;
}
#region -- clear stuff--
if (IsStarted)
{
GMaps.Instance.MemoryCache.RemoveOverload();
tileDrawingListLock.AcquireReaderLock();
try
{
Matrix.ClearLevelAndPointsNotIn(Zoom, tileDrawingList);
}
finally
{
tileDrawingListLock.ReleaseReaderLock();
}
}
#endregion
UpdateGroundResolution();
#if UseGC
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
#endif
Debug.WriteLine(ctid + " - OnTileLoadComplete: " + lastTileLoadTimeMs + "ms, MemoryCacheSize: " + GMaps.Instance.MemoryCache.Size + "MB");
if (OnTileLoadComplete != null)
{
OnTileLoadComplete(lastTileLoadTimeMs);
}
#endregion
}
if (!IsStarted || false == Monitor.Wait(tileLoadQueue, WaitForTileLoadThreadTimeout, false) || !IsStarted)
{
stop = true;
break;
}
}
if (IsStarted && !stop || tileLoadQueue.Count > 0)
{
task = tileLoadQueue.Pop();
}
}
finally
{
Monitor.Exit(tileLoadQueue);
}
if (task.HasValue && IsStarted)
{
try
{
#region -- execute --
var m = Matrix.GetTileWithReadLock(task.Value.Zoom, task.Value.Pos);
if (!m.NotEmpty)
{
Debug.WriteLine(ctid + " - try load: " + task);
Tile t = new Tile(task.Value.Zoom, task.Value.Pos);
foreach (var tl in provider.Overlays)
{
int retry = 0;
do
{
PureImage img = null;
Exception ex = null;
if (task.Value.Zoom >= provider.MinZoom && (!provider.MaxZoom.HasValue || task.Value.Zoom <= provider.MaxZoom))
{
if (skipOverZoom == 0 || task.Value.Zoom <= skipOverZoom)
{
// tile number inversion(BottomLeft -> TopLeft)
if (tl.InvertedAxisY)
{
img = GMaps.Instance.GetImageFrom(tl, new GPoint(task.Value.Pos.X, maxOfTiles.Height - task.Value.Pos.Y), task.Value.Zoom, out ex);
}
else // ok
{
img = GMaps.Instance.GetImageFrom(tl, task.Value.Pos, task.Value.Zoom, out ex);
}
}
}
if (img != null && ex == null)
{
if (okZoom < task.Value.Zoom)
{
okZoom = task.Value.Zoom;
skipOverZoom = 0;
Debug.WriteLine("skipOverZoom disabled, okZoom: " + okZoom);
}
}
else if (ex != null)
{
if ((skipOverZoom != okZoom) && (task.Value.Zoom > okZoom))
{
if (ex.Message.Contains("(404) Not Found"))
{
skipOverZoom = okZoom;
Debug.WriteLine("skipOverZoom enabled: " + skipOverZoom);
}
}
}
// check for parent tiles if not found
if (img == null && okZoom > 0 && fillEmptyTiles && Provider.Projection is MercatorProjection)
{
int zoomOffset = task.Value.Zoom > okZoom ? task.Value.Zoom - okZoom : 1;
long Ix = 0;
GPoint parentTile = GPoint.Empty;
while (img == null && zoomOffset < task.Value.Zoom)
{
Ix = (long)Math.Pow(2, zoomOffset);
parentTile = new GPoint((task.Value.Pos.X / Ix), (task.Value.Pos.Y / Ix));
img = GMaps.Instance.GetImageFrom(tl, parentTile, task.Value.Zoom - zoomOffset++, out ex);
}
if (img != null)
{
// offsets in quadrant
long Xoff = Math.Abs(task.Value.Pos.X - (parentTile.X * Ix));
long Yoff = Math.Abs(task.Value.Pos.Y - (parentTile.Y * Ix));
img.IsParent = true;
img.Ix = Ix;
img.Xoff = Xoff;
img.Yoff = Yoff;
// wpf
//var geometry = new RectangleGeometry(new Rect(Core.tileRect.X + 0.6, Core.tileRect.Y + 0.6, Core.tileRect.Width + 0.6, Core.tileRect.Height + 0.6));
//var parentImgRect = new Rect(Core.tileRect.X - Core.tileRect.Width * Xoff + 0.6, Core.tileRect.Y - Core.tileRect.Height * Yoff + 0.6, Core.tileRect.Width * Ix + 0.6, Core.tileRect.Height * Ix + 0.6);
// gdi+
//System.Drawing.Rectangle dst = new System.Drawing.Rectangle((int)Core.tileRect.X, (int)Core.tileRect.Y, (int)Core.tileRect.Width, (int)Core.tileRect.Height);
//System.Drawing.RectangleF srcRect = new System.Drawing.RectangleF((float)(Xoff * (img.Img.Width / Ix)), (float)(Yoff * (img.Img.Height / Ix)), (img.Img.Width / Ix), (img.Img.Height / Ix));
}
}
if (img != null)
{
//Debug.WriteLine(ctid + " - tile loaded: " + img.Data.Length / 1024 + "KB, " + task);
{
t.AddOverlay(img);
}
break;
}
else
{
if (ex != null)
{
lock (FailedLoads)
{
if (!FailedLoads.ContainsKey(task.Value))
{
FailedLoads.Add(task.Value, ex);
if (OnEmptyTileError != null)
{
if (!RaiseEmptyTileError)
{
RaiseEmptyTileError = true;
OnEmptyTileError(task.Value.Zoom, task.Value.Pos);
}
}
}
}
}
if (RetryLoadTile > 0)
{
Debug.WriteLine(ctid + " - ProcessLoadTask: " + task + " -> empty tile, retry " + retry);
{
Thread.Sleep(1111);
}
}
}
}while (++retry < RetryLoadTile);
}
if (t.HasAnyOverlays && IsStarted)
{
Matrix.SetTile(t);
}
else
{
t.Dispose();
}
}
#endregion
}
catch (Exception ex)
{
Debug.WriteLine(ctid + " - ProcessLoadTask: " + ex.ToString());
}
finally
{
if (Refresh != null)
{
Refresh.Set();
}
}
}
}
Monitor.Enter(tileLoadQueue);
try
{
Debug.WriteLine("Quit - " + ct.Name);
lock (GThreadPool)
{
GThreadPool.Remove(ct);
}
}
finally
{
Monitor.Exit(tileLoadQueue);
}
}