private static void AnimatedSourceChanged(
DependencyObject o,
DependencyPropertyChangedEventArgs e)
{
if (!(o is Image imageControl))
{
return;
}
ImageSource oldValue = e.OldValue as ImageSource;
ImageSource newValue = e.NewValue as ImageSource;
if (oldValue == newValue)
{
return;
}
if (oldValue != null)
{
imageControl.Loaded -= new RoutedEventHandler(ImageBehavior.ImageControlLoaded);
imageControl.Unloaded -= new RoutedEventHandler(ImageBehavior.ImageControlUnloaded);
AnimationCache.DecrementReferenceCount(oldValue, ImageBehavior.GetRepeatBehavior(imageControl));
ImageBehavior.GetAnimationController(imageControl)?.Dispose();
imageControl.Source = (ImageSource)null;
}
if (newValue == null)
{
return;
}
imageControl.Loaded += new RoutedEventHandler(ImageBehavior.ImageControlLoaded);
imageControl.Unloaded += new RoutedEventHandler(ImageBehavior.ImageControlUnloaded);
if (!imageControl.IsLoaded)
{
return;
}
ImageBehavior.InitAnimationOrImage(imageControl);
}
private static void ImageControlUnloaded(object sender, RoutedEventArgs e)
{
if (!(sender is Image imageControl))
{
return;
}
ImageSource animatedSource = ImageBehavior.GetAnimatedSource(imageControl);
if (animatedSource != null)
{
AnimationCache.DecrementReferenceCount(animatedSource, ImageBehavior.GetRepeatBehavior(imageControl));
}
ImageBehavior.GetAnimationController(imageControl)?.Dispose();
}
private static RepeatBehavior GetActualRepeatBehavior(
Image imageControl,
BitmapDecoder decoder,
GifFile gifMetadata)
{
RepeatBehavior repeatBehavior = ImageBehavior.GetRepeatBehavior(imageControl);
if (repeatBehavior != new RepeatBehavior())
{
return(repeatBehavior);
}
int num = gifMetadata == null?ImageBehavior.GetRepeatCount(decoder) : (int)gifMetadata.RepeatCount;
return(num == 0 ? RepeatBehavior.Forever : new RepeatBehavior((double)num));
}
private static ObjectAnimationUsingKeyFrames GetAnimation(
Image imageControl,
BitmapSource source)
{
ObjectAnimationUsingKeyFrames animation1 = AnimationCache.GetAnimation((ImageSource)source, ImageBehavior.GetRepeatBehavior(imageControl));
if (animation1 != null)
{
return(animation1);
}
GifFile gifFile;
if (!(ImageBehavior.GetDecoder(source, out gifFile) is GifBitmapDecoder decoder) || decoder.Frames.Count <= 1)
{
return((ObjectAnimationUsingKeyFrames)null);
}
ImageBehavior.Int32Size fullSize = ImageBehavior.GetFullSize((BitmapDecoder)decoder, gifFile);
int frameIndex = 0;
ObjectAnimationUsingKeyFrames animation2 = new ObjectAnimationUsingKeyFrames();
TimeSpan zero = TimeSpan.Zero;
BitmapSource baseFrame = (BitmapSource)null;
foreach (BitmapFrame frame1 in decoder.Frames)
{
ImageBehavior.FrameMetadata frameMetadata = ImageBehavior.GetFrameMetadata((BitmapDecoder)decoder, gifFile, frameIndex);
BitmapSource frame2 = ImageBehavior.MakeFrame(fullSize, (BitmapSource)frame1, frameMetadata, baseFrame);
DiscreteObjectKeyFrame discreteObjectKeyFrame = new DiscreteObjectKeyFrame((object)frame2, (KeyTime)zero);
animation2.KeyFrames.Add((ObjectKeyFrame)discreteObjectKeyFrame);
zero += frameMetadata.Delay;
switch (frameMetadata.DisposalMethod)
{
case ImageBehavior.FrameDisposalMethod.None:
case ImageBehavior.FrameDisposalMethod.DoNotDispose:
baseFrame = frame2;
break;
case ImageBehavior.FrameDisposalMethod.RestoreBackground:
baseFrame = !ImageBehavior.IsFullFrame(frameMetadata, fullSize) ? ImageBehavior.ClearArea(frame2, frameMetadata) : (BitmapSource)null;
break;
}
++frameIndex;
}
animation2.Duration = (Duration)zero;
animation2.RepeatBehavior = ImageBehavior.GetActualRepeatBehavior(imageControl, (BitmapDecoder)decoder, gifFile);
AnimationCache.AddAnimation((ImageSource)source, ImageBehavior.GetRepeatBehavior(imageControl), animation2);
AnimationCache.IncrementReferenceCount((ImageSource)source, ImageBehavior.GetRepeatBehavior(imageControl));
return(animation2);
}