protected override string GetDownloadUrl(IGeoSpatialDownloadTile tile)
{
return string.Format(CultureInfo.InvariantCulture,
m_formatString, m_serverUri,
m_dataSetName, tile.Level, tile.Col, tile.Row,
tile.West, tile.South, tile.East, tile.North);
}
internal ArcIMSDownloadRequest(IGeoSpatialDownloadTile oTile, ArcIMSImageStore oImageStore, string strLocalFilePath, CultureInfo oInfo)
: base(oTile, oImageStore, strLocalFilePath, oImageStore.ServerUri.ToBaseUri())
{
m_oCultureInfo = oInfo;
CalculateArtificialZoom();
}
internal DapTileDownload(string imagePath, IGeoSpatialDownloadTile oTile, DAPImageStore imageStore)
: base()
{
m_oTile = oTile;
m_oImageStore = imageStore;
Url = imageStore.Server.Url;
}
protected override void QueueDownload(IGeoSpatialDownloadTile oTile, string strLocalFilePath)
{
oTile.TileSet.AddToDownloadQueue(oTile.TileSet.Camera,
new ArcIMSDownloadRequest(oTile, this, strLocalFilePath, m_oCultureInfo));
}
protected override void QueueDownload(IGeoSpatialDownloadTile tile, string filePath)
{
tile.TileSet.AddToDownloadQueue(tile.TileSet.Camera,
new DAPDownloadRequest(tile, this, filePath));
}
protected virtual void QueueDownload(IGeoSpatialDownloadTile tile, string filePath)
{
string url = GetDownloadUrl(tile);
tile.TileSet.AddToDownloadQueue(tile.TileSet.Camera,
new GeoSpatialDownloadRequest(tile, this, filePath, url));
}
/// <summary>
/// Figure out how to download the image.
/// TODO: Allow subclasses to have control over how images are downloaded,
/// not just the download url.
/// </summary>
protected virtual string GetDownloadUrl(IGeoSpatialDownloadTile tile)
{
// No local image, return our "duplicate" tile if any
if (m_duplicateTexturePath != null && File.Exists(m_duplicateTexturePath))
return m_duplicateTexturePath;
// No image available anywhere, give up
return "";
}
internal Texture LoadFile(IGeoSpatialDownloadTile tile)
{
string filePath = GetLocalPath(tile);
tile.ImageFilePath = filePath;
// remove broken files
if (File.Exists(filePath))
{
FileInfo fi = new FileInfo(filePath);
if (fi.Length == 0)
File.Delete(filePath);
}
if (!File.Exists(filePath))
{
string badFlag = filePath + ".txt";
if (File.Exists(badFlag))
{
FileInfo fi = new FileInfo(badFlag);
if (DateTime.Now - fi.LastWriteTime < TimeSpan.FromDays(1))
{
return null;
}
// Timeout period elapsed, retry
File.Delete(badFlag);
}
if (IsDownloadableLayer)
{
QueueDownload(tile, filePath);
return null;
}
if (DuplicateTexturePath == null)
// No image available, neither local nor online.
return null;
filePath = DuplicateTexturePath;
}
// Use color key
Texture texture = null;
if (tile.TileSet.ColorKeyMax != 0)
{
texture = ImageHelper.LoadTexture(filePath, tile.TileSet.ColorKey,
tile.TileSet.ColorKeyMax);
}
else
{
texture = ImageHelper.LoadTexture(filePath, tile.TileSet.ColorKey);
}
if (texture == null) return null;
SurfaceDescription sd = texture.GetLevelDescription(0);
if (sd.Width != sd.Height)
Log.Write(Log.Levels.Error, "ISTOR", "non-square texture in file " + filePath + "may cause export issues :");
tile.TextureSizePixels = sd.Width;
if (tile.TileSet.CacheExpirationTime != TimeSpan.MaxValue)
{
FileInfo fi = new FileInfo(filePath);
DateTime expiry = fi.LastWriteTimeUtc.Add(tile.TileSet.CacheExpirationTime);
if (DateTime.UtcNow > expiry)
QueueDownload(tile, filePath);
}
return texture;
}
internal virtual string GetLocalPath(IGeoSpatialDownloadTile tile)
{
if (tile.Level >= m_levelCount)
throw new ArgumentException(string.Format("Level {0} not available.",
tile.Level));
string relativePath = String.Format(@"{0}\{1:D4}\{1:D4}_{2:D4}.{3}",
tile.Level, tile.Row, tile.Col, m_imageFileExtension);
if (m_dataDirectory != null)
{
// Search data directory first
string rawFullPath = Path.Combine(m_dataDirectory, relativePath);
if (File.Exists(rawFullPath))
return rawFullPath;
}
// If cache doesn't exist, fall back to duplicate texture path.
if (m_cacheDirectory == null)
return m_duplicateTexturePath;
// Try cache with default file extension
string cacheFullPath = Path.Combine(m_cacheDirectory, relativePath);
if (File.Exists(cacheFullPath))
return cacheFullPath;
// Try cache but accept any valid image file extension
const string ValidExtensions = ".bmp.dds.dib.hdr.jpg.jpeg.pfm.png.ppm.tga.gif.tif";
string cacheSearchPath = Path.GetDirectoryName(cacheFullPath);
if (Directory.Exists(cacheSearchPath))
{
foreach (string imageFile in Directory.GetFiles(
cacheSearchPath,
Path.GetFileNameWithoutExtension(cacheFullPath) + ".*"))
{
string extension = Path.GetExtension(imageFile).ToLower();
if (ValidExtensions.IndexOf(extension) < 0)
continue;
return imageFile;
}
}
return cacheFullPath;
}
/// <summary>
/// Deletes the cached copy of the tile.
/// </summary>
/// <param name="tile"></param>
internal virtual void DeleteLocalCopy(IGeoSpatialDownloadTile tile)
{
string filename = GetLocalPath(tile);
if (File.Exists(filename))
File.Delete(filename);
}
/// <summary>
/// Initializes a new instance of the <see cref= "T:WorldWind.Renderable.GeoSpatialDownloadRequest"/> class.
/// </summary>
/// <param name="tile"></param>
public GeoSpatialDownloadRequest(IGeoSpatialDownloadTile tile, ImageStore imageStore, string localFilePath, string downloadUrl)
{
m_tile = tile;
m_url = downloadUrl;
m_localFilePath = localFilePath;
m_imageStore = imageStore;
}
internal DAPDownloadRequest(IGeoSpatialDownloadTile tile, DAPImageStore imageStore, string localFilePath)
: base(tile, imageStore, localFilePath, "")
{
m_DapImageStore = imageStore;
}
internal DapTileDownload(string imagePath, IGeoSpatialDownloadTile oTile, DAPImageStore imageStore)
: base()
{
m_oTile = oTile;
m_oImageStore = imageStore;
Url = imageStore.Server.Url;
}
internal DAPDownloadRequest(IGeoSpatialDownloadTile tile, DAPImageStore imageStore, string localFilePath)
: base(tile, imageStore, localFilePath, "")
{
m_DapImageStore = imageStore;
}
internal ArcIMSDownloadRequest(IGeoSpatialDownloadTile oTile, ArcIMSImageStore oImageStore, string strLocalFilePath, CultureInfo oInfo)
: base(oTile, oImageStore, strLocalFilePath, oImageStore.ServerUri.ToBaseUri())
{
m_oCultureInfo = oInfo;
CalculateArtificialZoom();
}
/// <summary>
/// This can be used by mesh calculation to calculate projected meshes for tiles
/// </summary>
internal virtual void GetProjectionCorners(IGeoSpatialDownloadTile tile, out UV ul, out UV ur, out UV ll, out UV lr)
{
// For normal quad tiles this is equal to the geographic coordinates
ul = new UV(tile.West, tile.North);
ur = new UV(tile.East, tile.North);
ll = new UV(tile.West, tile.South);
lr = new UV(tile.East, tile.South);
}
protected override void QueueDownload(IGeoSpatialDownloadTile oTile, string strLocalFilePath)
{
oTile.TileSet.AddToDownloadQueue(oTile.TileSet.Camera,
new ArcIMSDownloadRequest(oTile, this, strLocalFilePath, m_oCultureInfo));
}
protected override void QueueDownload(IGeoSpatialDownloadTile tile, string filePath)
{
tile.TileSet.AddToDownloadQueue(tile.TileSet.Camera,
new DAPDownloadRequest(tile, this, filePath));
}