public APngAnimationProvider(string path, NConvert meta) : base(path, meta)
{
if (!IsAnimatedPng(path))
{
_nativeImageProvider = new NativeImageProvider(path, meta);
Animator = _nativeImageProvider.Animator;
return;
}
var decoder = new APNGBitmap(path);
_baseFrame = decoder.DefaultImage;
_frames = new List <FrameInfo>(decoder.Frames.Length);
_renderedFrames = new List <BitmapSource>(decoder.Frames.Length);
Enumerable.Repeat(0, decoder.Frames.Length).ForEach(_ => _renderedFrames.Add(null));
Animator = new Int32AnimationUsingKeyFrames {
RepeatBehavior = RepeatBehavior.Forever
};
var wallclock = TimeSpan.Zero;
for (var i = 0; i < decoder.Frames.Length; i++)
{
var frame = decoder.Frames[i];
_frames.Add(new FrameInfo(decoder.IHDRChunk, frame));
Animator.KeyFrames.Add(new DiscreteInt32KeyFrame(i, KeyTime.FromTimeSpan(wallclock)));
wallclock += _frames[i].Delay;
}
}
public override void Dispose()
{
if (_nativeImageProvider != null)
{
_nativeImageProvider.Dispose();
_nativeImageProvider = null;
return;
}
_frames.Clear();
_renderedFrames.Clear();
}
