private static void SetImage(LazyImage image, ImageSource source, Uri sourceFrom)
{
try
{
if (image.UriSource != sourceFrom)
{
return;
}
if (source == null)
{
// unset value
image.Source = null;
return;
}
if (!source.IsFrozen)
{
throw new ArgumentException("Image is not frozen.");
}
image.Source = source;
}
// ReSharper disable EmptyGeneralCatchClause
catch
// ReSharper restore EmptyGeneralCatchClause
{
}
}
private static void PushDecodeTask(Uri uriSource, LazyImage targetImage,
byte[] bytes, int dpw, int dph)
{
_decodeStack.Push(Tuple.Create(uriSource, targetImage, bytes, dpw, dph));
if (Interlocked.Increment(ref _decodeThreadConcurrency) > MaxDecodeConcurrency)
{
Interlocked.Decrement(ref _decodeThreadConcurrency);
return;
}
// run task
RunNextDecodeTask();
}
private static void ReloadImage(LazyImage img, Uri uri, int dpw, int dph)
{
try
{
img.Source = null;
if (uri.Scheme == "pack")
{
// PACK image
var bi = new BitmapImage(uri)
{
CacheOption = BitmapCacheOption.OnLoad
};
bi.Freeze();
SetImage(img, bi, uri);
}
else
{
byte[] cache;
if (GetCache(uri, out cache))
{
// decode image
PushDecodeTask(uri, img, cache, dpw, dph);
return;
}
IObservable <byte[]> observable;
Subject <byte[]> publisher = null;
lock (_imageObservables)
{
if (!_imageObservables.TryGetValue(uri, out observable))
{
observable = publisher = new Subject <byte[]>();
_imageObservables.Add(uri, publisher);
}
}
observable.Subscribe(b => PushDecodeTask(uri, img, b, dpw, dph), ex => { });
if (publisher != null)
{
PushLoadTask(uri, publisher);
}
}
}
// ReSharper disable EmptyGeneralCatchClause
catch
// ReSharper restore EmptyGeneralCatchClause
{
}
}
private static void SetImage(LazyImage image, ImageSource source, Uri sourceFrom)
{
try
{
if (image.UriSource != sourceFrom) return;
if (source == null)
{
// unset value
image.Source = null;
return;
}
if (!source.IsFrozen)
{
throw new ArgumentException("Image is not frozen.");
}
image.Source = source;
}
// ReSharper disable EmptyGeneralCatchClause
catch
// ReSharper restore EmptyGeneralCatchClause
{
}
}
private static void ReloadImage(LazyImage img, Uri uri, int dpw, int dph)
{
try
{
img.Source = null;
if (uri.Scheme == "pack")
{
// PACK image
var bi = new BitmapImage(uri) { CacheOption = BitmapCacheOption.OnLoad };
bi.Freeze();
SetImage(img, bi, uri);
}
else
{
byte[] cache;
if (GetCache(uri, out cache))
{
// decode image
PushDecodeTask(uri, img, cache, dpw, dph);
return;
}
IObservable<byte[]> observable;
Subject<byte[]> publisher = null;
lock (_imageObservables)
{
if (!_imageObservables.TryGetValue(uri, out observable))
{
observable = publisher = new Subject<byte[]>();
_imageObservables.Add(uri, publisher);
}
}
observable.Subscribe(b => PushDecodeTask(uri, img, b, dpw, dph), ex => { });
if (publisher != null)
{
PushLoadTask(uri, publisher);
}
}
}
// ReSharper disable EmptyGeneralCatchClause
catch
// ReSharper restore EmptyGeneralCatchClause
{
}
}
private static void PushDecodeTask(Uri uriSource, LazyImage targetImage,
byte[] bytes, int dpw, int dph)
{
_decodeStack.Push(Tuple.Create(uriSource, targetImage, bytes, dpw, dph));
if (Interlocked.Increment(ref _decodeThreadConcurrency) > MaxDecodeConcurrency)
{
Interlocked.Decrement(ref _decodeThreadConcurrency);
return;
}
// run task
RunNextDecodeTask();
}
private static void PushDecodeTask(Uri uriSource, LazyImage targetImage,
byte[] bytes, int dpw, int dph)
{
_decodeStack.Push(Tuple.Create(uriSource, targetImage, bytes, dpw, dph));
_decodeSignal.Set();
}
private static void ReloadImage(LazyImage img, Uri uri, int dpw, int dph)
{
try
{
if (uri.Scheme == "pack")
{
// PACK image
var bi = new BitmapImage(uri) { CacheOption = BitmapCacheOption.OnLoad };
bi.Freeze();
SetImage(img, bi, uri);
}
else
{
byte[] cache;
if (GetCache(uri, out cache))
{
_taskFactory.StartNew(() =>
{
var b = CreateImage(cache, dpw, dph);
DispatcherHolder.Enqueue(() => SetImage(img, b, uri), DispatcherPriority.Loaded);
});
return;
}
img.Source = null;
Subject<byte[]> publisher = null;
_imageStreamer.GetOrAdd(uri, _ => publisher = new Subject<byte[]>())
.Select(b => CreateImage(b, dpw, dph))
.Subscribe(b => DispatcherHolder.Enqueue(
() => SetImage(img, b, uri), DispatcherPriority.Loaded)
, ex => { });
if (publisher != null)
{
_taskFactory.StartNew(() => LoadBytes(uri, publisher));
}
}
}
// ReSharper disable EmptyGeneralCatchClause
catch
// ReSharper restore EmptyGeneralCatchClause
{
}
}
private static void SetImage(LazyImage image, ImageSource source, Uri sourceFrom)
{
try
{
if (source != null && image.UriSource == sourceFrom)
{
if (!source.IsFrozen)
throw new ArgumentException("Image is not frozen.");
image.Source = source;
}
}
// ReSharper disable EmptyGeneralCatchClause
catch
// ReSharper restore EmptyGeneralCatchClause
{
}
}