CustomWWW getCachedWWW(string url, TileInfo ti)
{
string filePath = GetLocalFilePathForURL(url, ti);
CustomWWW www;
bool useCached = false;
useCached = _tileEnableLocalCache && System.IO.File.Exists(filePath);
if (useCached)
{
if (!_tilePreloadTiles || !filePath.Contains(PREFIX_MIN_ZOOM_LEVEL))
{
//check how old
System.DateTime written = File.GetLastWriteTimeUtc(filePath);
System.DateTime now = System.DateTime.UtcNow;
double totalHours = now.Subtract(written).TotalHours;
if (totalHours > 300)
{
File.Delete(filePath);
useCached = false;
}
}
}
ti.source = useCached ? TILE_SOURCE.Cache : TILE_SOURCE.Online;
if (useCached)
{
#if UNITY_STANDALONE_WIN || UNITY_WSA
string pathforwww = "file:///" + filePath;
#else
string pathforwww = "file://" + filePath;
#endif
www = new CustomWWW(pathforwww);
}
else
{
www = new CustomWWW(url);
}
return(www);
}
internal IEnumerator LoadTileContentBackground(TileInfo ti)
{
yield return(new WaitForEndOfFrame());
string url = GetTileURL(_tileServer, ti);
if (string.IsNullOrEmpty(url))
{
Debug.LogError("Tile server url not set. Aborting");
yield break;
}
long downloadedBytes = 0;
string error = null;
string filePath = "";
byte[] textureBytes = null;
ti.source = TILE_SOURCE.Unknown;
// Check if tile is given by external event
if (OnTileRequest != null)
{
if (OnTileRequest(ti.zoomLevel, ti.x, ti.y, out ti.texture, out error) && ti.texture != null)
{
ti.source = TILE_SOURCE.Resources;
}
}
// Check if tile is in Resources
if (ti.source == TILE_SOURCE.Unknown && _tileEnableOfflineTiles)
{
string path = GetTileResourcePath(ti.x, ti.y, ti.zoomLevel, false);
ResourceRequest request = Resources.LoadAsync <Texture2D> (path);
yield return(request);
if (request.asset != null)
{
ti.texture = (Texture2D)request.asset;
ti.source = TILE_SOURCE.Resources;
}
else if (tileOfflineTilesOnly)
{
ti.texture = tileResourceFallbackTexture;
ti.source = TILE_SOURCE.Resources;
}
}
CustomWWW www = null;
if (ti.source == TILE_SOURCE.Unknown)
{
www = getCachedWWW(url, ti);
yield return(www);
error = www.error;
}
for (int tries = 0; tries < 100; tries++)
{
if (spreadLoadAmongFrames > 0)
{
break;
}
yield return(new WaitForEndOfFrame());
}
spreadLoadAmongFrames--;
_concurrentLoads--;
if (!ti.visible) // non visible textures are ignored
{
ti.loadStatus = TILE_LOAD_STATUS.InQueue;
yield break;
}
if (!string.IsNullOrEmpty(error))
{
_tileLastError = "Error getting tile: " + error + " url=" + url;
_tileLastErrorDate = DateTime.Now;
if (_tileDebugErrors)
{
Debug.Log(_tileLastErrorDate + " " + _tileLastError);
}
ti.loadStatus = TILE_LOAD_STATUS.InQueue;
yield break;
}
// Load texture
if (ti.source != TILE_SOURCE.Resources)
{
downloadedBytes = www.bytesDownloaded;
textureBytes = www.bytes;
ti.texture = www.textureNonReadable;
www.Dispose();
www = null;
// Check texture consistency
if (ti.loadedFromCache || _tileEnableLocalCache)
{
filePath = GetLocalFilePathForURL(url, ti);
}
if (ti.loadedFromCache && ti.texture.width <= 16) // Invalid texture in local cache, retry
{
if (File.Exists(filePath))
{
File.Delete(filePath);
}
ti.loadStatus = TILE_LOAD_STATUS.Inactive;
ti.queueTime = Time.time;
yield break;
}
}
ti.texture.wrapMode = TextureWrapMode.Clamp;
_tileSize = ti.texture.width;
// Save texture
if (_tileEnableLocalCache && ti.source != TILE_SOURCE.Resources && !File.Exists(filePath))
{
_tileCurrentCacheUsage += textureBytes.Length;
BackgroundSaver saver = new BackgroundSaver(textureBytes, filePath);
saver.Start();
}
// Update stats
switch (ti.source)
{
case TILE_SOURCE.Cache:
_cacheLoads++;
_cacheLoadTotalSize += downloadedBytes;
break;
case TILE_SOURCE.Resources:
_resourceLoads++;
break;
default:
_webDownloads++;
_webDownloadTotalSize += downloadedBytes;
break;
}
if (loadQueue.Contains(ti))
{
loadQueue.Remove(ti);
}
FinishLoadingTile(ti);
}
void Estimate()
{
// Manage downloads
int activeDownloads = 0;
for (int k = 0; k < concurrentDownloads; k++)
{
if (downloads [k].busy)
{
CustomWWW www = downloads [k].www;
if (www.isDone)
{
bool good = string.IsNullOrEmpty(www.error);
// Check texture consistency
if (good)
{
Texture2D tex = www.textureNonReadable;
if (tex == null)
{
good = false;
}
else if (tex.width < 16)
{
good = false;
DestroyImmediate(tex);
}
}
if (good)
{
// save to resources
estimationTotalSize += www.bytesDownloaded * www.bytesDownloaded;
estimationDownloads++;
storageSize = numTiles * Mathf.Sqrt(estimationTotalSize / estimationDownloads) / ONE_MEGABYTE;
downloads [k].busy = false;
}
else
{
if (downloads [k].retries < 3)
{
downloads [k].retries++;
Debug.LogError("Retrying " + downloads [k].retries + " times due error on tile XYZ = " + downloads [k].x + "/" + downloads [k].y + "/" + downloads [k].zoomLevel + " : " + www.error);
downloads [k].www = new CustomWWW(www.url);
activeDownloads++;
}
else
{
downloads [k].busy = false;
}
}
www.Dispose();
}
else
{
activeDownloads++;
}
}
}
for (int k = 0; k < concurrentDownloads; k++)
{
if (!downloads [k].busy)
{
if (activeDownloads >= concurrentDownloads)
{
return;
}
// Get next tile
bool remainingTiles = GetNextTileRandom();
// Have we finished?
if (!remainingTiles)
{
if (activeDownloads == 0)
{
StopOperation();
}
return;
}
ti.x = x;
ti.y = y;
ti.zoomLevel = zoomLevel;
string url = map.GetTileURL(map.tileServer, ti);
downloads [k].busy = true;
downloads [k].retries = 0;
downloads [k].x = x;
downloads [k].y = y;
downloads [k].zoomLevel = zoomLevel;
downloads [k].www = new CustomWWW(url);
activeDownloads++;
}
}
}
void Download()
{
// Manage downloads
int activeDownloads = 0;
for (int k = 0; k < concurrentDownloads; k++)
{
if (downloads [k].busy)
{
CustomWWW www = downloads [k].www;
if (www.isDone)
{
bool good = string.IsNullOrEmpty(www.error);
// Check texture consistency
if (good)
{
Texture2D tex = www.textureNonReadable;
if (tex == null)
{
good = false;
}
else if (tex.width < 16)
{
good = false;
DestroyImmediate(tex);
}
}
if (good)
{
// save to resources
bytesDownloaded += www.bytes.Length;
File.WriteAllBytes(downloads [k].path, www.bytes);
downloadedTilesCount++;
downloadedTilesSize += bytesDownloaded;
downloads [k].busy = false;
}
else
{
if (downloads [k].retries < 3)
{
downloads [k].retries++;
Debug.LogError("Retrying " + downloads [k].retries + " times due error on tile XYZ = " + downloads [k].x + "/" + downloads [k].y + "/" + downloads [k].zoomLevel + " : " + www.error);
downloads [k].www = new CustomWWW(www.url);
activeDownloads++;
}
else
{
downloads [k].busy = false;
}
}
www.Dispose();
}
else
{
activeDownloads++;
}
}
}
int iterations = 0;
for (int k = 0; k < concurrentDownloads; k++)
{
if (!downloads [k].busy)
{
if (activeDownloads >= concurrentDownloads)
{
return;
}
// Get next tile
bool remainingTiles = GetNextTile();
// Have we finished?
if (!remainingTiles)
{
if (activeDownloads == 0)
{
StopOperation();
}
return;
}
ti.x = x;
ti.y = y;
ti.zoomLevel = zoomLevel;
string url = map.GetTileURL(map.tileServer, ti);
// Is current tile already in Resources path?
string tilePath = map.GetTileResourcePath(x, y, zoomLevel);
if (File.Exists(tilePath))
{
if (++iterations < 128)
{
k--;
}
}
else
{
downloads [k].busy = true;
downloads [k].retries = 0;
downloads [k].x = x;
downloads [k].y = y;
downloads [k].zoomLevel = zoomLevel;
downloads [k].path = tilePath;
downloads [k].www = new CustomWWW(url);
activeDownloads++;
}
}
}
}