public override void SetImageDrawable(Drawable drawable)
{
var gifDrawable = drawable as FFGifDrawable;
if (gifDrawable != null)
{
_tcs?.Cancel();
_tcs = new CancellationTokenSource();
var previous = Drawable;
_drawableRef = new WeakReference <Drawable>(drawable);
base.SetImageDrawable(drawable);
UpdateDrawableDisplayedState(drawable, true);
UpdateDrawableDisplayedState(previous, false);
PlayGif(gifDrawable, _tcs.Token);
return;
}
GifDecoder currenGifDecoder = null;
Drawable currentDrawable = null;
if (_drawableRef != null && _drawableRef.TryGetTarget(out currentDrawable) && currentDrawable != null)
{
var currentGifDrawable = currentDrawable as FFGifDrawable;
currenGifDecoder = currentGifDrawable?.GifDecoder;
}
var bitmapDrawable = drawable as BitmapDrawable;
if (bitmapDrawable == null || currenGifDecoder == null || !currenGifDecoder.ContainsBitmap(bitmapDrawable?.Bitmap))
{
_tcs?.Cancel();
var previous = Drawable;
_drawableRef = new WeakReference <Drawable>(drawable);
base.SetImageDrawable(drawable);
UpdateDrawableDisplayedState(drawable, true);
UpdateDrawableDisplayedState(previous, false);
}
else
{
base.SetImageDrawable(drawable);
}
}
