public BitmapSource GetImage(string fullPath)
{
if (!_cache.TryGetValue(fullPath, out var result))
{
if (!File.Exists(fullPath))
{
return(null);
}
try
{
var image = GraphicsUtils.Downsize(fullPath, MaxImageWidth, MaxImageHeight);
if (image != null)
{
result = new ImageAndLastUsed {
BitmapImage = image, LastUsedUtc = DateTime.UtcNow
};
_cache.AddOrUpdate(
fullPath,
result,
(s, value) =>
{
value.LastUsedUtc = DateTime.UtcNow;
return(value);
});
}
if (_cache.Count > MaxItemCount)
{
RemoveOldImages();
}
}
catch (Exception ex)
{
Log.Logger.Error(ex, $"Could not cache image {fullPath}");
}
}
else
{
Log.Logger.Debug($"Image in cache: {fullPath}");
result.LastUsedUtc = DateTime.UtcNow;
}
return(result?.BitmapImage);
}
private static ImageSource CreateThumbnailImage(Bitmap image, int thumbnailWidth, int thumbnailHeight)
{
var bmp = GraphicsUtils.BitmapToBitmapImage(image);
return(GraphicsUtils.Downsize(bmp, thumbnailWidth, thumbnailHeight));
}