/// <summary>
/// Request a texture download. The download will be processed asynchronously. If there is
/// already a request in progress for this URL a second request will *not* be queued.
/// </summary>
/// <param name="url">URL to download.</param>
/// <param name="layerNameToSet">Layer identifier for this request.</param>
/// <param name="dateTimeToSet">Date of this request.</param>
/// <param name="handler">Callback that will be invoked when the texture is ready.</param>
/// <param name="prepareForRendering">True if the texture will be used for rendering. If
/// true mipmaps will be generated and an aniso bias set. If false the texture will be
/// loaded and returned with no further processing.</param>
/// <param name="queueNum">The download queue to use for this request. Queues are identified
/// by index, and all downloads in a queue can be cancelled without affecting other
/// queues.</param>
public void RequestTexture(string url, string layerNameToSet, DateTime dateTimeToSet,
TextureDownloadHandler handler, bool prepareForRendering = true, int queueNum = 0)
{
DownloadStatus status;
bool haveEntry = downloadRequests.TryGetValue(url, out status);
bool requestInProgress = haveEntry && status == DownloadStatus.InProgress;
if (!requestInProgress)
{
DownloadTask globeTileLayerSet = new DownloadTask
{
url = url,
layerName = layerNameToSet,
date = dateTimeToSet,
handler = handler,
prepareTextureForRendering = prepareForRendering
};
downloadRequests[url] = DownloadStatus.InProgress;
SwarmManager.Instance.EnqueueRequest(new DownloadRequest
{
url = url,
callbackAction = t =>
{
Texture2D myTexture = new Texture2D(2, 2, TextureFormat.RGB24, true, linearTextures);
myTexture.LoadImage(t.downloadHandler.data, false);
//HACK: Unity does not provide a callback if the image for the texture is unrecognized.
//The default texture for an unrecognized image is a red question mark that is 8x8.
//Here we check for that and swap it for a black texture.
if (myTexture.height == 8)
{
myTexture = Texture2D.blackTexture;
}
if (globeTileLayerSet.prepareTextureForRendering)
{
myTexture.wrapMode = TextureWrapMode.Clamp;
myTexture.mipMapBias = globalMipMapBias;
myTexture.anisoLevel = globalAnisoLevel;
myTexture.Apply(true, false);
}
globeTileLayerSet.texture = myTexture;
globeTileTexturesToLoadQueue.Enqueue(globeTileLayerSet);
}
});
if (!globeTileQueueLookup.ContainsKey(url))
{
globeTileQueueLookup.Add(url, globeTileLayerSet);
}
}
else
{
DownloadTask globeTileLayerSet = globeTileQueueLookup[url];
globeTileLayerSet.handler += handler;
globeTileLayerSet.prepareTextureForRendering =
globeTileLayerSet.prepareTextureForRendering || prepareForRendering;
}
}
/// <summary>
/// Request a texture download. The download will be processed asynchronously. If there is
/// already a request in progress for this URL a second request will *not* be queued.
/// </summary>
/// <param name="url">URL to download.</param>
/// <param name="layerNameToSet">Layer identifier for this request.</param>
/// <param name="dateTimeToSet">Date of this request.</param>
/// <param name="handler">Callback that will be invoked when the texture is ready.</param>
/// <param name="prepareForRendering">True if the texture will be used for rendering. If
/// true mipmaps will be generated and an aniso bias set. If false the texture will be
/// loaded and returned with no further processing.</param>
/// <param name="queueNum">The download queue to use for this request. Queues are identified
/// by index, and all downloads in a queue can be cancelled without affecting other
/// queues.</param>
public void RequestTexture(string url, string layerNameToSet, DateTime dateTimeToSet,
TextureDownloadHandler handler, bool prepareForRendering = true, int queueNum = 0)
{
DownloadStatus status;
bool haveEntry = downloadRequests.TryGetValue(url, out status);
bool requestInProgress = haveEntry && status == DownloadStatus.InProgress;
if (!requestInProgress)
{
DownloadTask globeTileLayerSet = new DownloadTask
{
url = url,
layerName = layerNameToSet,
date = dateTimeToSet,
handler = handler,
prepareTextureForRendering = prepareForRendering
};
downloadRequests[url] = DownloadStatus.InProgress;
SwarmManager.Instance.EnqueueRequest(new DownloadRequest
{
url = url,
callbackAction = t =>
{
Texture2D myTexture = new Texture2D(2, 2, TextureFormat.RGB24, true, linearTextures);
myTexture.LoadImage(t.downloadHandler.data, false);
if (globeTileLayerSet.prepareTextureForRendering)
{
myTexture.wrapMode = TextureWrapMode.Clamp;
myTexture.mipMapBias = globalMipMapBias;
myTexture.anisoLevel = globalAnisoLevel;
myTexture.Apply(true, true);
}
globeTileLayerSet.texture = myTexture;
globeTileTexturesToLoadQueue.Enqueue(globeTileLayerSet);
}
});
if (!globeTileQueueLookup.ContainsKey(url))
{
globeTileQueueLookup.Add(url, globeTileLayerSet);
}
}
else
{
DownloadTask globeTileLayerSet = globeTileQueueLookup[url];
globeTileLayerSet.handler += handler;
globeTileLayerSet.prepareTextureForRendering =
globeTileLayerSet.prepareTextureForRendering || prepareForRendering;
}
}
private void RequestTexture(Layer layer, DateTime date, TextureDownloadHandler handler, int layerNum)
{
url = layer.WmtsToUrl(coords, date);
//Debug.Log(url);
// Load from cache if possible
if (globe.tileTextureCache.ExistsInCache(url))
{
handler(layer.identifier, date, globe.tileTextureCache.GetTexture(url));
}
else
{
globe.downloader.RequestTexture(url, layer.identifier, date, handler, queueNum: layerNum + 1);
}
}
