/**
* Return a texture from a url that points to an image resource
*
* This method does not block but queues a request to fetch the image and return null.
* When the image has been fetched this method will return the image texture downloaded.
*/
public static CachedAssetStoreImage TextureFromUrl(string url, string label, int textureSize, GUIStyle labelStyle, GUIStyle iconStyle, bool onlyCached)
{
if (string.IsNullOrEmpty(url))
{
return(Instance.m_DummyItem);
}
CachedAssetStoreImage cached;
bool newentry = true;
if (CachedAssetStoreImages.TryGetValue(url, out cached))
{
cached.lastUsed = EditorApplication.timeSinceStartup;
// Refetch the image if the size has changed and is not in the progress of being fetched
bool refetchInitiated = cached.requestedWidth == textureSize;
bool correctSize = cached.image != null && cached.image.width == textureSize;
bool cacheRequestAborted = cached.requestedWidth == -1;
if ((correctSize || refetchInitiated || onlyCached) && !cacheRequestAborted)
{
Instance.CacheHit++;
// Use cached image (that may be null) if we're in progress of fetching the image
// or if we have rendered the images correctly
//return cached;
bool fetchingImage = cached.client != null;
bool labelDrawn = cached.label == null;
bool valid = fetchingImage || labelDrawn;
bool convPerTickExceeded = Instance.m_ConvertedThisTick > kMaxConvertionsPerTick;
s_NeedsRepaint = s_NeedsRepaint || convPerTickExceeded;
return((valid || convPerTickExceeded) ?
cached :
RenderEntry(cached, labelStyle, iconStyle));
}
//Debug.Log(string.Format("Found {0} {1} {2} {3}", correctSize, refetchInitiated, onlyCached, cacheRequestAborted));
newentry = false;
if (Downloading >= kMaxConcurrentDownloads)
{
return(cached.image == null ? Instance.m_DummyItem : cached);
}
}
else
{
if (onlyCached || Downloading >= kMaxConcurrentDownloads)
{
return(Instance.m_DummyItem);
}
cached = new CachedAssetStoreImage();
cached.image = null;
cached.lastUsed = EditorApplication.timeSinceStartup;
//Debug.Log("url is " + textureSize.ToString() + " " + url);
}
// Only set fetch time when there is not image in order to use it for
// fading in the image when it becomes available
if (cached.image == null)
{
cached.lastFetched = EditorApplication.timeSinceStartup;
}
cached.requestedWidth = textureSize;
cached.label = label;
AsyncHTTPClient client = null;
client = SetupTextureDownload(cached, url, "previewSize-" + textureSize);
ExpireCacheEntries();
if (newentry)
{
CachedAssetStoreImages.Add(url, cached);
}
client.Begin();
Instance.Requested++;
return(cached);
}
