private static void CloseAnimationOrImage(Image?imageControl)
{
if (imageControl == null)
{
return;
}
ImageSource source = GetAnimatedSource(imageControl);
if (source != null)
{
AnimationCache.DecrementReferenceCount(source, GetRepeatBehavior(imageControl));
}
ImageAnimationController controller = GetAnimationController(imageControl);
if (controller != null)
{
controller.Dispose();
}
SetAnimationController(imageControl, null);
SetIsAnimationLoaded(imageControl, false);
}
private static ObjectAnimationUsingKeyFrames?GetAnimation(Image imageControl, BitmapSource source)
{
ObjectAnimationUsingKeyFrames?animation = AnimationCache.GetAnimation(source,
GetRepeatBehavior(imageControl));
if (animation != null)
{
return(animation);
}
GifFile?gifMetadata;
var decoder = GetDecoder(source, out gifMetadata) as GifBitmapDecoder;
if (decoder != null && decoder.Frames.Count > 1)
{
Int32Size fullSize = GetFullSize(decoder, gifMetadata);
int index = 0;
animation = new ObjectAnimationUsingKeyFrames();
TimeSpan totalDuration = TimeSpan.Zero;
BitmapSource?baseFrame = null;
foreach (BitmapFrame rawFrame in decoder.Frames)
{
FrameMetadata metadata = GetFrameMetadata(decoder, gifMetadata, index);
BitmapSource frame = MakeFrame(fullSize, rawFrame, metadata, baseFrame);
var keyFrame = new DiscreteObjectKeyFrame(frame, totalDuration);
animation.KeyFrames.Add(keyFrame);
totalDuration += metadata.Delay;
switch (metadata.DisposalMethod)
{
case FrameDisposalMethod.None:
case FrameDisposalMethod.DoNotDispose:
baseFrame = frame;
break;
case FrameDisposalMethod.RestoreBackground:
if (IsFullFrame(metadata, fullSize))
{
baseFrame = null;
}
else
{
baseFrame = ClearArea(frame, metadata);
}
break;
case FrameDisposalMethod.RestorePrevious:
// Reuse same base frame
break;
}
index++;
}
animation.Duration = totalDuration;
animation.RepeatBehavior = GetActualRepeatBehavior(imageControl, decoder, gifMetadata);
AnimationCache.AddAnimation(source, GetRepeatBehavior(imageControl), animation);
return(animation);
}
return(null);
}
private static void InitAnimationOrImage(Image?imageControl)
{
if (imageControl == null)
{
return;
}
var source = GetAnimatedSource(imageControl) as BitmapSource;
bool isInDesignMode = DesignerProperties.GetIsInDesignMode(imageControl);
bool animateInDesignMode = GetAnimateInDesignMode(imageControl);
bool shouldAnimate = !isInDesignMode || animateInDesignMode;
// For a BitmapImage with a relative UriSource, the loading is deferred until
// BaseUri is set. This method will be called again when BaseUri is set.
bool isLoadingDeferred = IsLoadingDeferred(source);
if (source != null && shouldAnimate && !isLoadingDeferred)
{
// Case of image being downloaded: retry after download is complete
if (source.IsDownloading)
{
EventHandler?handler = null;
handler = (sender, args) =>
{
source.DownloadCompleted -= handler;
InitAnimationOrImage(imageControl);
};
source.DownloadCompleted += handler;
imageControl.Source = source;
return;
}
ObjectAnimationUsingKeyFrames?animation = GetAnimation(imageControl, source);
if (animation != null)
{
if (animation.KeyFrames.Count > 0)
{
// For some reason, it sometimes throws an exception the first time... the second time it works.
TryTwice(() => imageControl.Source = (ImageSource)animation.KeyFrames[0].Value);
}
else
{
imageControl.Source = source;
}
RepeatBehavior repeatBehavior = GetRepeatBehavior(imageControl);
bool synchronized = GetSynchronizedBySource(imageControl);
AnimationCache.IncrementReferenceCount(source, repeatBehavior);
AnimationClock?clock;
if (synchronized)
{
clock = AnimationCache.GetClock(source, repeatBehavior);
if (clock == null)
{
clock = animation.CreateClock();
AnimationCache.AddClock(source, repeatBehavior, clock);
}
}
else
{
clock = animation.CreateClock();
}
var controller = new ImageAnimationController(imageControl, animation, clock);
SetAnimationController(imageControl, controller);
SetIsAnimationLoaded(imageControl, true);
imageControl.RaiseEvent(new RoutedEventArgs(AnimationLoadedEvent, imageControl));
return;
}
}
imageControl.Source = source;
}
