/// <summary>
/// Gets the cache key.
/// </summary>
protected override Tuple <ICacheKey, int> GetKey(
IProducerContext producerContext)
{
return(new Tuple <ICacheKey, int>(
_cacheKeyFactory.GetBitmapCacheKey(
producerContext.ImageRequest,
producerContext.CallerContext),
producerContext.LowestPermittedRequestLevel));
}
/// <summary>
/// Returns whether the image is stored in the bitmap memory cache.
/// </summary>
/// <param name="imageRequest">
/// The imageRequest for the image to be looked up.
/// </param>
/// <returns>
/// true if the image was found in the bitmap memory cache,
/// false otherwise.
/// </returns>
public bool IsInBitmapMemoryCache(ImageRequest imageRequest)
{
if (imageRequest == null)
{
return(false);
}
ICacheKey cacheKey = _cacheKeyFactory.GetBitmapCacheKey(imageRequest, null);
CloseableReference <CloseableImage> reference = _bitmapMemoryCache.Get(cacheKey);
try
{
return(CloseableReference <CloseableImage> .IsValid(reference));
}
finally
{
CloseableReference <CloseableImage> .CloseSafely(reference);
}
}