public bool ProcessTileRenderedQueue()
{
base.VerifyAccess();
using (this.processTileRenderedQueueRegion.UseEnterScope())
{
if (this.IsDisposed)
{
bool flag = false;
do
{
KeyValuePair <PointInt32, RenderedTileInfo> pair;
while (this.tilesRenderedQueue.TryDequeue(out pair))
{
DisposableUtil.Free <IBitmap <ColorPbgra32> >(ref pair.Value.Buffer);
flag = true;
}
}while (Interlocked.Exchange(ref this.isProcessTileRenderedQueueQueued, 0) == 1);
return(flag);
}
if (Interlocked.Exchange(ref this.isProcessTileRenderedQueueQueued, 0) == 0)
{
return(false);
}
List <PointInt32> collection = new List <PointInt32>();
List <PointInt32> cancelledTileOffsets = null;
bool flag3 = false;
int count = this.tilesRenderedQueue.Count;
for (int i = 0; i < count; i++)
{
KeyValuePair <PointInt32, RenderedTileInfo> pair2;
if (this.tilesRenderedQueue.TryDequeue(out pair2))
{
PointInt32 key = pair2.Key;
RenderedTileInfo info2 = pair2.Value;
IBitmap <ColorPbgra32> buffer = info2.Buffer;
if (this.tilesRenderingCancelledSet.Remove(key) || !info2.Completed)
{
DisposableUtil.Free <IBitmap <ColorPbgra32> >(ref buffer);
if (this.tilesRenderQueue.Contains(key))
{
flag3 = true;
}
else if (info2.Error is OperationCanceledException)
{
if (cancelledTileOffsets == null)
{
cancelledTileOffsets = new List <PointInt32>();
}
cancelledTileOffsets.Add(key);
}
}
else
{
if ((buffer.IsNullReference <IBitmap <ColorPbgra32> >() || buffer.IsDisposed) || !pair2.Value.Completed)
{
throw new PaintDotNet.InternalErrorException();
}
IBitmap <ColorPbgra32> disposeMe = this.tileBuffers[key.Y][key.X];
DisposableUtil.Free <IBitmap <ColorPbgra32> >(ref disposeMe);
this.tileBuffers[key.Y][key.X] = buffer;
this.tileIsValid[key.Y][key.X] = true;
collection.Add(key);
}
if (!this.tilesRenderingSet.Remove(key))
{
throw new PaintDotNet.InternalErrorException();
}
}
}
if (collection.Any <PointInt32>())
{
this.owner.NotifyTileCacheFinishedRendering <List <PointInt32> >(this, collection);
}
if (flag3)
{
this.ProcessTileRenderQueue();
}
if (!this.tilesRenderingSet.Any <PointInt32>())
{
this.owner.NotifyTileCacheIsIdle(this);
}
if (cancelledTileOffsets != null)
{
this.syncContext.Post(delegate(object _) {
this.InvalidateCancelledTiles(cancelledTileOffsets);
});
}
return(collection.Any <PointInt32>());
}
}