private void InitializeRequestThreads(Context context, RasterDataDetails details, ClipmapLevel clipmapLevelZero, RasterLevel rasterLevelZero)
{
details.WorkerWindow = Device.CreateWindow(1, 1);
context.MakeCurrent();
#if !SingleThreaded
Thread requestThread = new Thread(RequestThreadEntryPoint);
requestThread.IsBackground = true;
requestThread.Start(details);
#endif
// Preload the entire world at level 0
RasterTileRegion[] regions = rasterLevelZero.GetTilesInExtent(0, 0, rasterLevelZero.LongitudePosts - 1, rasterLevelZero.LatitudePosts - 1);
foreach (RasterTileRegion region in regions)
{
RequestTileLoad(details, clipmapLevelZero, region.Tile);
}
}