/// <summary>
/// データを追加し、バッファサイズが大きくなったときは古いものを削除
/// </summary>
/// <param name="dictionary"></param>
public static void AddOrExtrude
(this ConcurrentDictionary <string, ImageBufferItem> dictionary,
string key, ImageBufferItem value, int size)
{
if (dictionary.Count > size)
{
dictionary.ReleaseOldImage();
}
dictionary.AddOrUpdate(key, value,
(oldkey, oldvalue) => (oldvalue.Quality <= value.Quality) ? value : oldvalue);
}
private bool TryGetImageData
(string path, ImageQuality quality, out ImageBufferItem result)
{
if (path == null)
{
result = null;
return(false);
}
/*
#if DEBUG
* if (this.thumbNailImages.Count > 0)
* {
* result = this.thumbNailImages.First().Value;
* if (result != null)
* {
* return true;
* }
* }
#endif*/
var key = path;
if (quality == ImageQuality.ThumbNail)
{
return(this.thumbNailImages.TryGetOrRemove(key, out result));
}
if (this.images.TryGetOrRemoveWithQuality(key, quality, out result))
{
return(true);
}
if (quality == ImageQuality.LowQuality)
{
if (this.thumbNailImages.TryGetOrRemove(key, out result))
{
return(true);
}
}
result = null;
return(false);
}